digital-flotm digital instantaneous steam/water plate & frame heat … · 2011. 6. 16. · 5...

Digital-FloTM

Digital Instantaneous Steam/Water Plate & Frame Heat Exchanger

Product ManualThis Water Heater has been supplied for this application based upon information provided to Armstrong at the time the order was accepted.

This Digital Instantaneous Steam/Water Plate & Frame Heat Exchanger has been designed, fabricated and confi gured specifi cally for this installation and, as such, there may be customized components which are not specifi cally addressed within this document.

Supplemental Product Manual’s and Installation and Maintenance Guides specifi c to the peripheral components supplied on/with Digital Instantaneous Steam/Water Shell & Tube Heat Exchanger are available online at: http://www.armstronginternational.com or by calling Armstrong Toll Free at 1-888-HOT-HOSE.

Model Number ________________________________

Serial Number_________________________________

Ship Date_____________________________________

Customer Support:

Armstrong Hot Water GroupPhone: (269) 279-3602Fax: (269) 279-3130E-mail: [email protected]

IOM-786-B

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The Digital-Flo Steam/Water Plate & Frame Heat Exchanger assembly covered by this IOM features installation, commissioning, operation and general maintenance detail.

Each Digital-Flo Steam/Water Plate & Frame Heat Exchanger is serialized and the serial number is maintained on fi le in the Technical Department at Armstrong.

For any installation, operational or maintenance detail not covered in this Product Manual please call Armstrong Toll Free at 1-888-HOT HOSE and reference this serial number.

Supplemental Product Manual’s and Installation and Maintenance Guides specifi c to the peripheral components supplied on/with Digital-Flo Steam/Water Plate & Frame Heat Exchangers are available online at: http://www.armstronginternational.com

Customer Support:Armstrong Hot Water Group

Phone: (269) 279-3602Fax: (269) 279-3130

e-mail: [email protected]

Digital-FloTM Steam/Water Plate & Frame Heat Exchanger

Armstrong has technical support personnel available from 8:00 a.m. to 5:00 p.m. EST. Call Toll Free 1-888-468-4673.

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Table of Contents

Safety Warnings ..................................................................................................................................................5

Installation Details Form (IDF) .............................................................................................................................8

Installation Schematic........................................................................................................................................12

Operating Specifi cations....................................................................................................................................10

Standard Materials of Construction ..............................................................................................................10-11

Standard Dimensions and Weights ..................................................................................................................7-8

Installation ..................................................................................................................................................10-11

Commissioning .............................................................................................................................................14-29

Operation .......................................................................................................................................................33

Maintenance - Heat Exchanger .........................................................................................................................34

Maintenance - DRV80 ..................................................................................................................................35-41

Component Identifi cation Guide ........................................................................................................................44

Spare Parts - DRV80 Only ................................................................................................................................41

Troubleshoot Guide ......................................................................................................................................42-43

Warranty Information .........................................................................................................................................46


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Digital-FloTM Steam/Water Shell & Tube Heat Exchanger


Digital Controller

Single integral digital control valve (DRV80) REPLACES:- Steam Control Valve

- PID Controller- High Temperature Limit Thermostat- High Temperature Limit Controller

- Cold Water Injection Valve- Internal Circulating Pump

- Compressed Air Requirement

ASSE 1017 CSA B125 and CE certified

Outlet Temperature to system +/- 2°F/1°C

4-20mA Connection Port

Hot water shutoff upon power failure

Serial data port for BAS Module (BrainScan™) connectivity. Transmits/receives all field programmable and LED display features

IRDA Port for PC programming

Field programmable Set point High temperature alert High temperature hot water shutoff Thermal disinfection

Battery back-up for emergency shutdown and default setting retention

316L Stainless steel construction

LED Display

Indicates Set point °C or °FOperating Temp °C or °F

Integral relay for auxiliary connection (alarm, solenoid)

Self diagnostics. Digital valve runs internal component check and reports out of specification performance on display

Port to port travel in 2.6 seconds

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Safety Warnings

Digital-Flo Steam/Water Plate & Frame Heat Exchangers are precision engineered and crafted with pride to deliver years of superior performance and customer satisfaction provided:

1. They are installed, commissioned, operated and maintained in accordance with the recommendations provided in this Product Guide and generally accepted plumbing, pipe-fi tting and general maintenance guidelines.

2. Periodic attention is given, as necessary, to maintain the product, the accessory fi ttings & components and the overall plumbing/distribution system is operated in good functional order.

General Safety

1. This product is designed and constructed to withstand the forces encountered during normal use.2. Use of the product for any purpose other than its intended use could cause damage to the product and may

cause an injury or fatality.3. Installation or maintenance must be carried out in accordance with the instructions provided in this product

manual by designated, qualifi ed and competent personnel.4. A licensed electrician familiar with local code requirements should be engaged to perform all electrical work.5. A licensed plumber or pipe fi tter familiar with local code requirements should be engaged to perform

installation and should be on hand to oversee commissioning.6. When installing, commissioning or servicing this product:

• Always ensure that all primary steam and condensate return lines and secondary water lines are isolated.• Ensure any residual internal pressure in the system or connecting pipe work is carefully relieved.• Always allow hot parts to cool before commencing work, to avoid the risk of burns.• Always wear appropriate safety clothing before carrying out any installation or maintenance work.


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Digital Plate & Frame Steam to Water Double Wall

Model Part Number Certifi edDrawing

Secondary Side Primary Side

Connections @ 7.5 ft/sec(2.3 m/s)

Flow @ 7.5 ft/sec(2.3 m/s) Connections

Capacity @ 15 psi (1 bar)Hot/Cold Recirc. Capacity @ 90°F (50°C) Delta T

Typical @120°F (49°C) Setpoint Steam Inlet Condensate Outlet

D1S DW D27603 CD2518 1” (25 mm) 1” (25 mm) 18.4 gpm (4.2 m3/hr) 2.5” (63.5 mm) 1” (25 mm) 973 lb/hr (441 kg/hr)

D2S DW D27604 CD2519 1.5” (40 mm) 1” (25 mm) 41.3 gpm (9.4 m3/hr) 3” (80 mm) 1.5” (40 mm) 2,185 lb/hr (991 kg/hr)

D3S DW D27605 CD2520 2” (50 mm) 2” (50 mm) 73.4 gpm (16.7 m3/hr) 3” (80 mm) 1.5” (40 mm) 3,883 lb/hr (1,761 kg/hr))

D4S DW D27606 CD2521 3” (80 mm) 2” (50 mm) 165.2 gpm (37.5 m3/hr) 6” (153 mm) 2” (50 mm) 8,741 lb/hr (3,965 kg/hr)

Digital Plate & Frame Steam to Water

Model Part Number Certifi edDrawing

Secondary Side Primary Side

Connections @ 7.5 ft/sec(2.3 m/s)

Flow @ 7.5 ft/sec(2.3 m/s) Connections

Capacity @ 15 psi (1 bar)Hot/Cold Recirc. Capacity @ 90°F (50°C) Delta T

Typical @120°F (49°C) Setpoint Steam Inlet Condensate Outlet

D1S D27593 CD2508 1” (25 mm) 1” (25 mm) 18.4 gpm (4.2 m3/hr) 2.5” (63.5 mm) 1” (25 mm) 973 lb/hr (441 kg/hr)

D2S D27594 CD2509 1.5” (40 mm) 1” (25 mm) 41.3 gpm (9.4 m3/hr) 3” (80 mm) 1.5” (40 mm) 2,185 lb/hr (991 kg/hr)

D3S D27595 CD2510 2” (50 mm) 2” (50 mm) 73.4 gpm (16.7 m3/hr) 3” (80 mm) 1.5” (40 mm) 3,883 lb/hr (1,761 kg/hr)

D4S D27596 CD2511 3” (80 mm) 2” (50 mm) 165.2 gpm (37.5 m3/hr) 6” (153 mm) 2” (50 mm) 8,741 lb/hr (3,965 kg/hr)

Maximum Allowable Steam Pressure = 15.0 psi (1 bar), Maximum Allowable Water Pressure = 150 psi (10 bar), Maximum Allowable Setpoint = 158°F (70°C)

*Consult factory for pressure drop information.

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Dimensions and Weight

ModelDimensions

in (mm) WeightA B C D E

D1S* 66.0 (1676) 50.7 (1288) 62.8 (1595) 62.8 (1595) 24.0 (610) Consult Factory




*Consult factory for Double Wall (DW) dimensional changes.

Standard Components

• Thermometers• DRV80 Digital Recirculating Valve• Steam Trap• Automatic Steam Safety Shut Off Valve

• Check Valves• Inlet Strainer(s)• Isolation Valves

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Digital-Flo Installation Details Form (IDF)We are unable to enter purchase orders into the system or guarantee delivery dates without a technically accurate and fully completed IDF.

The review and acceptance of the information on the IDF by Armstrong:1. Approves the order for processing which triggers an e-mail confi rmation2. Indicates that AHWG supports you by endorsing the application3. Initiates the warranty4. Delivers a complete, AHWG supported performance guarantee to the fi nal user of the product5. Drives the relevant point of specifi cation/infl uence, point of installation and point of order fi nancial allocation if appropriate

Section 1, Ordering Processing/Tracking Detail:Point of Order (Sold To): ____________________________________________________________________________

City: _______________________ State: _______________________ Rep Firm: _______________________

Point of Installation:___________________________________________________________________________________


Point of Specifi cation: ______________________________________________________________________________


Other Infl uence: ____________________________________________________________________________

Section 2, Product Technical Detail:

Constant Steam Pressure

Low Surface Temperature (Modulating Steam)

1. Primary Side Steam Pressure: ________PSI

2. Incoming Water Pressure: ________PSI

3. DRV80 Set Point: ________°F

4. Secondary Side Pump Flow Rate: ________GPM

5. Pre-piped PRV Station: Y _____ N _____

(eg: ABC Mechanical)

(eg: Mercy Hospital)

(eg: point of installation recommended product to point of specifi ation)

(eg: DEF Consulting Engineers)

PACKAGE REFERENCE INFORMATION

Reference Drawing # ___________________ Package Model # ___________________(Drawing Included With Quotation If Provided)

List any non standard variations: _________________________________________________________ __________________________________________________________________________________________


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Operating Specifi cations - Digital-Flo

Materials of Construction - Primary Side

Materials of Construction - Secondary Side

Operating Specifi cationsSteam Supply Pressure 2-15 psig (.14-1 bar)

Water Supply Pressure 20-150 PSI (1.4-10 bar)

Minimum Inlet Supply Water Temperature 34°F (1°C)

Set Point Range (DRV80) 81-158°F (27-70°C)

Minimum System Recirculation Flow 10 GPM (38 LPM)

Minimum System Draw Off 0 GPM

Minimum Distance to First Outlet 50 ft (15 m)

Minimum Recirculation Loop Temperature Loss 2°F (1°C)

Supply Fuse/Circuit Breaker (DRV80) 3 amp

Protection Rating (DRV80) IPX4

Signal Cable Fittings (DRV80) 3/8” Light Tight Conduit Fitting

Battery (DRV80) 2 x CR - P2 6V

Power Supply (DRV80) 120/240 V AC50-60 Hz

Power Supply - Safety Solenoid 120 V AC


Component MaterialPFX Plates 316 Stainless Steel

PFX Frame Carbon Steel Painted Acrylic

Gasket EPDM

Condensate/Steam Piping Cast Iron/Carbon Steel

PRV Station (Option) SG Iron/Carbon Steel

Control Valve SG Iron

Component MaterialDRV80 316L Stainless Steel

Pipework Copper

Fittings Brass/Bronze

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InstallationCommissioning must be carried out in accordance with these instructions by designated, qualifi ed and competent personnel.

ElectricalDigital-Flo requires electrical power to be supplied to the DRV80 and the Hot Water shut off valve. DRV80 is suitably rated (US NEMA 5) 12V DC electrical device which is supplied with a “smart” transformer capable of receiving 110V or 220V service. The electrical cable from the DRV80 transformer terminates in a two pronged plug suitable for insertion into a typical receptacle/outlet. A fused set of circuit blocks is provided in an enclosure to power the safety solenoid valve.

Digital-Flo requires a secondary side circulating pump which is not supplied as standard by Armstrong.

If the Digital-Flo low surface temperature option is selected an optional Sauter valve will need to be powered/wired.

A licensed electrician familiar with local code requirements should be engaged to install an outlet(s) with suitable amperage and circuit protection to power both the DRV80 and the safety solenoid valve.

Installation

1. Before any installation or maintenance procedure, always ensure that all primary steam and condensate return lines and secondary water lines are isolated.

2. Ensure any residual internal pressure in the system or connecting pipework is carefully relieved.3. Allow hot parts to cool before commencing work, to avoid the risk of burns.4. Always wear appropriate safety clothing before carrying out any installation or maintenance work.5. Place Digital-Flo in its desired location ensuring that there is adequate space left for service and maintenance

access. Secure stand to fl oor if necessary.

6. Connect an appropriately sized inlet steam supply pipe to the inlet of the heat exchanger shell. Note: The steam supply must be controlled such that the maximum operating conditions are not exceeded (see page 10). A pressure reducing valve should be used to achieve these conditions where necessary. In addition where the steam pressure might exceed the maximum rating of Digital-Flo a suitably sized safety relief valve should be fi tted to the incoming steam supply.

7. Connect the condensate return to the integral steam trap outlet (tagged accordingly).

8. Connect inlet cold water supply (tagged accordingly).9. Connect outlet (to system) (tagged accordingly).10. Connect recirculation return pipework (tagged accordingly).

Note: A system side recirculation pump must be maintained at all times installed on the inlet to the unit.

Note: Balance valves should be fi tted to all circuits per generally accepted piping practices.

Note: Satisfactory condensate removal is important to achieving optimum heater performance. As such an integral steam trap is supplied. Under certain conditions, constant pressure steam installations aid condensate removal prior to system stall point without the requirement for ancillary equipment.

Constant pressure steam systems which require condensate lift in excess of the inlet pressure available and low surface temperature models will require the use of a mechanical or electric pumping trap.

Note: Digital-Flo is supplied with an enable/disable high temperature limit protection for the secondary circuit.

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Commissioning Digital-Flo

Commissioning must be carried out in accordance with these instructions by designated, qualifi ed and competent personnel.

1. Check all plumbing, piping and electrical connections to ensure the installation meets specifi cation and generally accepted trade practices.

2. Ensure that the inlet steam supply valve to Digital-Flo is closed.

3. Ensure that all mixed water outlets on the system are closed.

4. Open condensate drain valve.

5. Vent air from system.

6. Flood the system by opening the appropriate isolation valves.

7. Turn the power to the DRV80 and the hot water outlet safety solenoid valve ON.

t

8. Start re-circulating pump.

9. Check for water circulation through Digital-Flo.

10. Slowly open the inlet steam supply valve to Digital-Flo.

11. Adjust Steam Pressure Reducing Valve (if installed)

12. Check the LED display on the DRV80. The display will indicate the secondary side delivery temperature and the system setpoint.

Note: Hot Water safety solenoid is controlled by a relay output on DRV80. Relay will open the normally closed solenoid valve AFTER it has gone through it full start up sequence providing no errors or faults are present.

Note: DRV80 is supplied factory preset to system temperature based upon information previously supplied toArmstrong.

Note: DRV80 is factory preset with a high limit default 18°F/10°C above DRV80 set point. To adjust DRV80 set point, high limit default or to enable/disable other integral valve features refer to pages 25-27.

Note: At system start up the display on the DRV80 may read a “temp low”.


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Installation Schematic


SteamInlet

F&T TrapCondensate Outlet

Mixed WaterOutlet

The BrainDRV80

RecirculationReturn

Cold WaterInlet

Condensate Trap

Pump

Solenoid Valve

Pressure Reducing Valve

Seperator

Expansion Tank

Shower

Flow Indicator

StrainerCheck Valve

Isolation Valve

SYMBOL KEY


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Commissioning the System


Commissioning must be carried out in accordance with these instructions by designated, qualifi ed and competent personnel.

Commissioning:1. Ensure that the system is powered and the display on the DRV80 is illuminated. Note: At system start up the display on the DRV80 may read an error message. This will correct itself automatically during commissioning.* 2. Flood the system by sequentially opening the inlet cold water isolation valve(s), the outlet fl ow isolation valve(s) and the inlet hot isolation valve(s). Ensure that the hot and cold inlet supplies are at their designated pressures and temperatures. 3. Ensure that all mixed water outlets are closed and turn on the circulating pump. 4. The display on the DRV80 will initially indicate the outlet water temperature and the default outlet water temperature set point which was programmed at the factory per installation details which were specifi ed at the time of order.

* If an error message appears in the LCD and does not correct itself automatically during commissioning, see “DRV80 Display Errors” on Page 29.

Temp. 119˚FSetpoint 120˚F

Temp. 119˚FSetpoint 120˚F

Display as seen during normal operating mode

Current Outlet Temperature

Current Setpoint

The following sections show temperature values in °F. This is region dependant setting and can be altered within the DRV80 Control Software.

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Adjusting Temperature


Important: The DRV80 is supplied to the job site preprogrammed to an outlet temperature set point specifi ed to Armstrong at the time the order was placed. In addition, Armstrong has enabled two levels of “out of temperature range” alerts. The alert presets can be adjusted by using the control software. Out of Temperature Range Alert Level 1 preset: +/- 5°F from set point = DRV80 will display “Temp High” or “Temp Low” only.

Out of Temperature Range Alert Level 2 preset: +/- 10°F from set point = DRV80 will display “Error Temp” and shut off inlet hot water supply.

The following example shows how the above settings affect the DRV80’s operation:

Note! The “Setpoint” value does not need to be the same as the “Default” value. Both “Setpoint” and “Default” are adjustable within the “Max.” and “Min.” range only.

Important! The software will not allow an “Error Temp.” value to be set lower than the “Max.” value plus the “Above” value.

There are three options for on site temperature adjustment:1. Temperature Adjustment using a Laptop Computer with software and a USB port adapter (supplied with

valve).2. Temperature Adjustment using a Building Automation System (BAS) or local area computer network (LAN)

with a direct 12 to 30vdc, 4-20mA connection to the DRV80. This is termed “Remote Setpoint Adjustment”.3. Temperature Adjustment using a Web Browser via the integral serial port and BrainScan™ supplied by

Armstrong.*

* This option is detailed in a separate Installation, Operation and Maintenance (IOM) Guide for BrainScan™. Available by contacting Armstrong technical support.

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Temperature Adjust Using Laptop or PC


System Requirements

Operating System: Windows XP or Windows Vista.

Minimum Screen Resolution: 1024 x 768 (Recommended 1280 x 1024 or higher.)

Wireless Connection to DRV80

1. Connect the IrDA Wireless Adapter to an available USB port on a laptop or PC.2. The IrDA Wireless Adapter needs to be within range of the DRV80 and pointing toward the black IrDA sensor on the front, below the LCD Display.

3. When the Adapter is in range, an icon will appear on the Windows Taskbar to confi rm.

4. When transferring data to and from the DRV80, the icon changes to confi rm button.

Software Installation

1. Insert the CD-ROM. The CD should run automatically. If the CD does not start automatically, then please use the support instructions on the CD wallet.2. Select the “Control Software” button from the menu and follow the on-screen instructions.3. The “Rada” Icon will automatically be placed on the desktop. Double-click the icon to launch the software.4. If the icon does not appear, locate and double click on the “Rada” icon in “C:\Program Files\Kohler Mira\ Rada Digital”.

The Control Software can be downloaded at https://armstronginternational.com/resource-library and search for “DRV80 Laptop”.

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DRV80 Control Screen


On launching an initial session, it is good practice to establish the DRV80’s current settings before making a change. Point the IrDA Infrared Adapter at the valve until the icon appears on the taskbar to confi rm a connection is established (see page 21), then press “Read”. The box above the “Read” and “Write” buttons shows the progress of the transfer. The DRV80’s current settings are now displayed.

To transfer data from the screen to the valve, press “Write”.

Press “Online/Offl ine” to change the DRV80’s control state.

“Online” - the DRV80 is controlling the temperature of the blend circuit within the programmed parameters.

“Offl ine” - the valve is switched to full cold fl ow and all temperature control functions and alarms are suspended.

Switching the DRV80 “Offl ine” makes the blend circuit safe when writing changes to the valve.

The current settings can be save to a recipe fi le (*.rcp) by choosing “File”, “Save”.

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Options


Switch “Offl ine” to make changes to “Options”.

The “Address” of the DRV80 as used by the BrainScan™ can be set to “Standard” or “Alternate”. This allows the use of two DRV80s on one serial line, such as DMC2 or DMC3 recirculation systems.Set the fi rst DRV80 to “Standard” and the second DRV80 to “Alternate”. The “Write” button must be pressed after this option is changed.Important Note: This function will only work with DRV80 version 9 and onwards. This can be found under “Valve Information” on the “DRV80 Control Screen”.

The “Offset” enables the system to correct for temperature loss and mixing conditions by creating a temperature offset to the valve. The offset temperature is subtracted from the setpoint temperature, this allows the valve to produce water at the correct temperature at the required point in the circuit. The offset is limited to ± 9°F (± 5°C). The “Write” button must be pressed after this option is changed.Important Note: This function will only work with DRV80 Version 9 and onwards. This can be found under “Valve Information” on the “DRV80 Control Screen”.

The temperature conversion units can be changed from °F to °C.

If the setpoint is required to be controlled via external software, switch the setpoint source to “Ext. 4-20mA”. Refer to section “DRV80 using Building Automation System (BAS)” for further details (page 35).Note! After changing the temperature display units or the setpoint source, the valve must be unplugged (powered off/on electrically) to complete the change. Press “Read” to confi rm the settings.

The “Disinfection Timeout” is the maximum number of minutes the temperature error messages are disabled to allow for disinfection and cool down before automatically switching back to normal operation. The “Disinfection Enable” box must be checked before the disinfection mode can be armed and triggered.

Caution! All temperature error messages could remain disabled after disinfection has been completed. During “Disinfection Timeout”, the temperature within the blend circuit is not thermostatically controlled until the “Cool Down” button is pressed.

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Disinfection


Switch “Online” to perform “Disinfection Cycle”.

The disinfection mode must first be enabled under “Options” before it can be armed and triggered. Due to the scalding temperature, the disinfection process must be supervised. The DRV80 should be monitored whilst in disinfection mode and no one should be allowed to approach within 3 metres of any affected outlets.

Press “Arm” to make ready. The green box will confi rm the operation.

Press “Trigger” while the box is green to start the disinfection cycle. The box will turn from green to red to confi rm the operation.

19

Disinfection (continued)

Water fl ow commences when the nine second countdown reaches zero and the display on the DRV80 changes to confi rm the disinfection mode. Press “Abort” at any time to stop the cycle.

Note! Pressing “Abort” could cause a temperature error to be displayed.

Full Hot 160˚FDisinfection

Press “Cool Down” as per the on screen instructions. The display on the DRV80 changes to confi rm the cool down mode. After the cool down period has been initiated, the blend circuit takes time to return to normal temperature. This must be considered when setting the “Disinfection Timeout” value under “Options”.

At the end of the “Disinfection Timeout” period, the DRV80 will return to it’s normal operating mode.

Temp 119˚FCooling Down

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Commission, Calibration and Servicing


Altering the “Calibration No.” will affect the performance of the DRV80. The “Calibration No.” must match the value printed on the valve body.Enter a name for the location of the DRV80 (maximum 16 characters). Press “Commission” and the location will be stored along with the date and time.

Switch “Online” to make changes to “Engineer”.

The location will now appear at the top of the window every time the “Read” button is pressed..

Press “Serviced” to record the time and date from the Laptop or PC.

21

Altering Absolute Setpoint Range and Alarms


Switch “Offl ine” to make changes to “Setpoints”.

1. Alter values to their required settings.

2. Turn DRV80 Offline by pressing “Valve Online/Offl ine”.

3. Transfer the settings to DRV80 by pressing “Write”.

4. Turn DRV80 back Online by pressing “Valve Online/Offl ine”.

5. Press “Read” to confi rm the settings have transferred to the DRV80.

Altering Local Setpoint Value

Setpoint - Explained

1. Alter the Setpoint to the required value.

2. Transfer the settings to DRV80 by pressing “Set”. (Valve does not have to be “Offl ine”.)

3. Alter the Setpoint back to the “Default” value by pressing “Reset to Default”.

4. The Setpoint value is shown on the DRV80.

Switch “Online” to make changes to “Temperatures”.

The setpoint is the required outlet water temperature supplied to the blend circuit. This area controls the range in which the setpoint can be adjusted to, but not the current setpoint itself (valve display). The Default value is the setpoint the valve will return to should the power be lost and the DRV80 reset. The “Default” is adjustable, but cannot be more than the “Max.” (maximum) value or less than the “Min.” (minimum) value.

22

Alarms - Explained


Example 1:

The DRV80 does not contain an audible alarm, however, the error relay may be used to send an alarm signal from the DRV80 if the blend temperature falls outside either the “Above” or “Below” tolerance values of the setpoint. If the blend temperature exceeds the “Error Temp.” value, the DRV80 activates the error relay and closes down to full cold. For more details on the error relay connection see section “DRV80 using Building Automation System (BAS)” in the Installation and Maintenance Guide.

Note! The “Setpoint” value does not need to be the same as the “Default” value. Both “Setpoint” and “Default” are adjustable within the “Max.” and “Min.” range only.

23

Example 2:

Important! The software will not allow an “Error Temp.” value to be set lower than the “Max.” value plus the “Above” value.

24

Temperatures


The current inlet and outlet temperatures are displayed. The setpoint is the current blend temperature the DRV80is instructed to control to. Pressing “Reset to Default” will alter to match the “Default” value in the “Setpoints” area.Switch valve to the “on” state and press “Read” to show the current settings. Press “Set” to transfer the setpoint to the valve. The display appears on the DRV80 indicating the normal operating mode.

25

Error Messages - PC Display

Armstrong has technical support personnel available from

Connection was lost during data transfer. Make sure IrDA adapter remains in the range of DRV80 (see IrDA symbolsbelow). If the error persists, make sure the IrDA adapter is inrange and cycle the power to DRV80 off/on once to reset.

Connection was not established before data transfer. Makesure IrDA adapter is in range of DRV80 (see IrDA symbolsbelow). If the error persists, make sure the IrDA adapter is in range and cycle the power to DRV80 off/on to reset.

Connection was not established before data transfer. Make sure IrDA adapter is in range of DRV80 (see IrDA symbolsbelow).

The “Enable Disinfection” box has not been checked and transferred to DRV80 prior to initiating a disinfection cycle.Check “Enabled Disinfection” box and press “Write”.

DRV80 is in range of IrDA adapter. If symbol is not displayedwhen IrDA is at close range, check USB connection (removeand reconnect IrDA) or cycle power to DRV80 off/on once.

Data is being transferred to/from DRV80. If symbol is not displayed, check IrDA adapter is in range of DRV80.

IrDA Symbols (Windows Tasker)

26

DRV80 Display Alerts


DRV80 Display Errors

Temp High 127˚FSetpoint 120˚F

Temp Low 100˚FSetpoint 120˚F

Emergency 85 FSetpoint 120 F

Temp 120˚FError PCB

Temp 120˚FError Motor

Temp 120˚FError Thermistor

Temp High 120˚FError Temp

Outlet temperature exceeds the alarm range. This condition causes an alarm signal to be activated.

Outlet temperature is below the alarm range. This condition causes an alarm signal to be activated.

Maintenance to the DRV80 internal motor is required. DRV80 continues to operate safely, but with reduced performance.

Reset the DRV80. If the error persists, replace the PCB.

Reset the DRV80. If the error persists, replace the Motor.

Reset the DRV80. If the error persists, check the Thermistor connections or replace the Thermistors.

Outlet temperature exceeds the “Error Temp” value. This condition causes the DRV80 to switch to full cold.

Temp 120˚FError Battery

Reset the DRV80. If the error persists, replace the battery (see “Fitting the Cable Conduit and Changing the Battery”).

27

DRV80 using Building Automation System (BAS)


DRV80 contains three integral connection points for component/system integration.1. Building Automation SystemThe DRV80 can be adjusted remotely when linked via its integral 12 to 30vdc, 4-20mA connection to a Building Automation System (BAS) or Local Area Computer Network (LAN).

Two signal connections can be made via a 3/8” Liquitight connector conduit fi tting.

The connections are:Remote Setpoint Adjustment. The ability to change the setpoint on the DRV80 via a Building Automation System (BAS) or Local Area Computer Network (LAN). This is an opto-isolated input intended for connection to a 12 to 30vdc, 4-20mA self powered transmitter with a maximum output of 12V. The connection is used to determine the DRV80’s setpoint and is scaled at 4-20 mA for 0 - 100°C. The input signal is only active when the DRV80 is con-fi gured to “Ext. 4-20 mA”. These settings can only be altered when the DRV80 is switched to its “Offl ine” state.

Actual Outlet Temperature Reading. The ability to link the computer signal from the DRV80 outlet temperature thermistor to a Building Automation System (BAS) or Local Area Computer Network (LAN).This is an opto-isolated signal intended for connection to a 4-20 mA self powered indicator with a maximum out-put of 12V. The signal sends the DRV80’s outlet temperature and is scaled at 4-20 mA for 1 - 100°C.

2. Error Relay ConnectionThe DRV80 can be connected to a downstream audible alarm, a solenoid valve or another ancillary device via a direct connection to its error relay via a liquitight connector conduit fi tting.

This provides a connection to a set of single pole changeover relay contacts fused at 2 Amps. When the DRV80 is operating normally, the relay is energized and therefore the contacts are closed. The relay is de-energized and the contacts are open under the following circumstances:

1. Power failure.2. Start up sequence.3. Outlet temperature causing an alarm signal.4. Outlet temperature causing an error signal.5. Internal fault on PCB.6. Battery failure.7. Thermistor failure.

3. Serial Line Connection*The DRV80 provides an RS485 serial interface for connection to BrainScan™.

Note: BrainScan™ is not specifically addressed by this Installation Manual.

* Serial Line Connection is detailed in a separate Installation, Operation and Maintenance (IOM) Guide for Brain-Scan™. Available by contacting Armstrong technical support.

28

DRV80 using Building Automation System (BAS) (continued)


29

DRV80 connected to generic BAS


30


Testing DRV80/BAS connections using two multimeters

Set Multimeters to mA dc current range.

Fault Diagnosis for BAS

Possible causes for BAS indicating an incorrect fl ow value:

• BAS analog input terminals resistance is too high causing current to be limited to the analog input giving a lower reading than expected on the BAS display.

• BAS signal scaling is incorrect. Consult BAS engineer.

Current Loop Check

31


Use Charts 1.1 and 1.2 to check the temperature output from the DRV80 against the current input from the BAS.

Cha

rt 1

.1 D

RV8

0 m

A ch

art (

ºC).

ºCm

AºC

mA

ºCm

AºC

mA

ºCm

AºC

mA

ºCm

AºC

mA

ºCm

AºC

mA

04

105.

620

7.2

308.

840

10.4

5012

6013

.670

15.2

8016

.890

18.4

14.

1611

5.76

217.

3631

8.96

4110

.56

5112

.16

6113

.76

7115

.36

8116

.96

9118

.56

24.

3212

5.92

227.

5232

9.12

4210

.72

5212

.32

6213

.92

7215

.52

8217

.12

9218

.72

34.

4813

6.08

237.

6833

9.28

4310

.88

5312

.48

6314

.08

7315

.68

8317

.28

9318

.88

44.

6414

6.24

247.

8434

9.44

4411

.04

5412

.64

6414

.24

7415

.84

8417

.44

9419

.04

54.

815

6.4

258

359.

645

11.2

5512

.865

14.4

7516

8517

.695

19.2

64.

9616

6.56

268.

1636

9.76

4611

.36

5612

.96

6614

.56

7616

.16

8617

.76

9619

.36

75.

1217

6.72

278.

3237

9.92

4711

.52

5713

.12

6714

.72

7716

.32

8717

.92

9719

.52

85.

2818

6.88

288.

4838

10.0

848

11.6

858

13.2

868

14.8

878

16.4

888

18.0

898

19.6

89

5.44

197.

0429

8.64

3910

.24

4911

.84

5913

.44

6915

.04

7916

.64

8918

.24

9919

.84

100

20

C

hart

1.2

DR

V80

mA

char

t (ºF

)

ºFm

AºF

mA

ºFm

AºF

mA

ºFm

AºF

mA

ºFm

AºF

mA

ºFm

AºF

mA

324

505.

668

7.2

868.

810

410

.412

212

140

13.6

158

15.2

176

16.8

194

18.4

33.8

4.16

51.8

5.76

69.8

7.36

87.8

8.96

105.

810

.56

123.

812

.16

141.

813

.76

159.

815

.36

177.

816

.96

195.

818

.56

35.6

4.32

53.6

5.92

71.6

7.52

89.6

9.12

107.

610

.72

125.

612

.32

143.

613

.92

161.

615

.52

179.

617

.12

197.

618

.72

37.4

4.48

55.4

6.08

73.4

7.68

91.4

9.28

109.

410

.88

127.

412

.48

145.

414

.08

163.

415

.68

181.

417

.28

199.

418

.88

39.2

4.64

57.2

6.24

75.2

7.84

93.2

9.44

111.

211

.04

129.

212

.64

147.

214

.24

165.

215

.84

183.

217

.44

201.

219

.04

414.

859

6.4

778

959.

611

311

.213

112

.814

914

.416

716

185

17.6

203

19.2

42.8

4.96

60.8

6.56

78.8

8.16

96.8

9.76

114.

811

.36

132.

812

.96

150.

814

.56

168.

816

.16

186.

817

.76

204.

819

.36

44.6

5.12

62.6

6.72

80.6

8.32

98.6

9.92

116.

611

.52

134.

613

.12

152.

614

.72

170.

616

.32

188.

617

.92

206.

619

.52

46.4

5.28

64.4

6.88

82.4

8.48

100.

410

.08

118.

411

.68

136.

413

.28

154.

414

.88

172.

416

.48

190.

418

.08

208.

419

.68

48.2

5.44

66.2

7.04

84.2

8.64

102.

210

.24

120.

211

.84

138.

213

.44

156.

215

.04

174.

216

.64

192.

218

.24

210.

219

.84

212

20

Operational Check

32

Fitting the Cable Conduit and Changing the Battery

Figure 22-1Isolate electricity to DRV80. Removeall 8 cover screws, make sure coveris constantly supported.

Figure 22-2.Caution heavy parts.Carefully remove cover anddisconnect display cable.

Figure 22-3.If required, pull batteries from housing andreplace with new batteries of same type.Do not mix old and new batteries.Do not use rechargeable batteries.

Figure 22-4.Remove blanking plugs as requiredand connect 3/8” Liquitight conduitfi ttings (not supplied) as shown usinga suitable spanner.

Figure 22-5.Fit 3/8” Liquitight conduit tube (notsupplied) and feed the wires throughas required. Do not overtighten theconduit fi ttings.

Figure 22-6.Reconnect display cover and carefully refi t cover. Loosely refi tscrews to locate cover correctly.Tighten all screws to secure cover.Restore electricity to DRV80.

Battery replacement and conduit connection must be carried out in accordance with these instructions by designated and competent personnel.


33

Operation

Digital-Flo™ employs digital technology to monitor inlet hot supply, inlet cold/system return water temperature.

In constant pressure steam supply systems this eliminates the requirement for a steam control valve.

Digital-Flo is supplied pre-piped and pressure tested with an integral digital re-circulating valve (The Brain – Model DRV80).

Inlet (2) and outlet (2) thermistors integral to The Brain and the time proven water temperature control accuracy eliminate the requirement for the external temperature sensors, programmers and controllers typically associated with steam heat exchangers.

A low surface temperature option is available which requires a secondary controller for applications where higher mineral content water portends a scaling concern.


34

Maintenance - Plate & Frame Heat Exchanger Module

Performance: Check temperatures and fl ow rates against commissioning data.

Plate Pack: Check tightening dimension and look for signs of leakage.

Nozzles: Check in general condition, and for signs of leakage.

Frame: Wipe clean all painted parts and check surfaces for signs of damage - “touch up” if required.

Bolts & Bars: Check for ruse, and clean. Lightly coat threaded parts with molybdenum grease, or a corrosion inhibitor (ensure that not grease etc falls onto the plate gaskets).

Gaskets: Check and replace when required.

Rollers: If fi tted to the follower frame plate, lubricate bearings with light machine oil.

Spare Parts: Note serial number on PHE and refer to IOM guide for specifi c PHE module supplied with heater.


A separate IOM is available for specifi c Plate & Frame Module supplied with your Digital-Flo™ Model

Note serial number on PHE and refer to IOM guide for specifi c PHE module supplied with heater.

Please call Armstrong Technical Support at 1-888-HOT-HOSE.

35

Maintenance - Digital Re-Circulating Valve

Time Interval: Minimum once per year.

Performance: Check temperatures and fl ow rates against commissioning data.

Batteries: Batteries are supplied to ensure the valve switches to a “Safe Mode” in the event of a primary power supply failure.

Battery life is variable depending on usage. A battery error message appears on the valve display when they require changing.

Where primary power supply failure occurs regularly or the valve is installed within a supply system where safety is critical, the batteries MUST be changed at least every 12 months as part of an annual maintenance routine.

In noncritical systems or where battery usage is low, longer replacement cycles may be considered up to a maximum of fi ve (5) years.


36

Servicing and Maintenance (continued)

WARNING - ISOLATE POWER AND WATER SUPPLIES BEFORE REMOVINGCOVER!

CAUTION - HEAVY EQUIPMENT! DISASSEMBLE WITH CARE. A MINIMUM OF 2PEOPLE REQUIRED TO SAFELY REMOVE APPLIANCE FROM PIPEWORK.

• DO NOT DAMAGE ELECTRONIC CONNECTIONS WHEN REMOVING COVER.• DO NOT TRAP ANY WIRES WHEN REFITTING COVER.

CAUTION - PARTS ARE EASILY DAMAGED!REASSEMBLE WITH CARE!


37


• ONLY USE 2 X CR - P2 6V BATTERIES (NOT INCLUDED IN SPARE PARTS).• DISCONNECT ALL WIRES BEFORE REMOVING PBC.• USE GREASE PROVIDED ON REPLACEMENT SEALS.• CHECK PCB FOR SIGNS OF RUST. SEE SECTION “FAULT DIAGNOSTICS - PROBLEM 9”.

*Directly affects digital water temperature control. Contact Armstrong for technical advice prior to fi tting.


+12V 0V

D8414 (us)D33170 (eu) Blue Wire = Cold Inlet

D8418

D8406

D8408

D8409D8412

D8413 (us)D33169 (eu)

*

38



39


• REMOVE SEALS USING NONMETALLIC TOOLS TO PREVENT SEAL GROOVE DAMAGE• CLEAN ALL GROOVES BEFORE REASSEMBLY.• USE GREASE PROVIDED WHEN REASSEMBLING SEALS.


40



D8410

D8405

D8407

D8406

D8411

• DO NOT DAMAGE MOTOR PCB.

REPLACE SEAL ONLY IF NECESSARY. D8404 *

*

*

Directly affects digital

41

Spare Parts - DRV80

D84

12

D84

11

D84

07

D84

10

D84

04

D84

05D

8406

D84

06

D84

15

D84

14 (u

s)D

3317

0 (e

u)

D84

18

x3D84

06

D84

08

D84

06

D84

08

D89

72

x2

D84

16

D84

15

D84

06x4

D84

09

D84

13 (u

s)D

3316

9 (e

u)

D84

17

D8404 Drive Mechanism.D8405 Spool Assembly.D8406 Screw and Seal Pack.D8407 Seal Housing.D8408 Thermistor Loom.D8409 Thermistor Retainers.D8410 Stepper Motor.D8411 Stepper Motor Loom.D8412 Battery Holder.D8413 PCB (US compatible).D8414 PSU (US compatible).D8415 Cover Seals.D8416 Display Window Assembly.D8417 LCD Display.D8418 Grommet Spare.D8972 Data Cable Spare.D33169 PCB (EU compatible).D33170 PSU (EU compatible).

42

Troubleshoot Guide

Problem Cause Solution

1. Unable to bring Secondary Side to temperature.

1. Primary side system fault. a. Check the steam system valve.b. Check the high temperature shut off valve is open. Spindle should be in the

down position.c. Ensure the high temperature trip setting in the DRV80 is set at least 10°C higher

than the desired hot water temperature.d. Check steam trap isolation valves are open.e. Check that the condensate temperature after the steam trap is at steam

temperature. If not, the steam trap may be blocked or the back pressure in the condensate line may be too high. Disconnect the pipework after the steam traps, running the condensate to drain, and see if the hot water comes up to temperature. If not, investigate potential problems on the condensate system or install a pump trap to overcome the higher back pressure. It no condensate exits the steam trap, disassemble and check for blockage.

f. If the “Low Surface Temperature” option is fi tted ensure the set point in the Econotrol panel (normally 90°C) is set higher than the hot water temperature set point on the DRV80. Please consult the LST/Econotrol IOM.

2. Secondary Side system fault. a. Check that the Secondary Side re-circulation line is hot. If it cool, then the non return valve may not be working correctly. A failed NRV may cause the cold water to bypass heat exchanger.

2. Secondary Side system temperature rises during periods of no system demand.

1. Secondary Side system fault. a. Flow rate is less than 10 GPM - reset fl ow rate, check for air locks, closed valves, pump failure, etc.

b. Return temperature less than 2°F below DRV80 set point. Ensure minimum temp drop around circuit of 2°F.

c. Check valve problem. Make sure placement of check valve is correct. Refer to installation schematics. Ensure that check vales are fully functional.

d. Water pressure. Ensure maintained supply pressures are balanced. Ensure that there is mixed return to water heater.

e. Flow problem. Ensure maintained supply pressures are balanced. Ensure that there is mixed return to water heater.

2. DRV80 fault a. Refer to DRV80 display error messages.

3. Secondary Side system temperature fl uctuates more than +/- 5°F.

1. Secondary Side system fault. a. Maintained supply pressures are unequal. Ensure that pressures are balanced. Check for blocked fi lters, closed valves, air locks, etc.

b. Supply temperatures. Check for reasonable temperature differential between set point and hot and cold inlet supply temperatures to DRV80.

2. DRV80 fault. a. Spool sticking. Clean and descale pool. Renew separator seal and lubricate assembly.

b. Refer to DRV80 display error messages.c. Poor calibration. Refer to DRV80 “Valve Calibration” screen.

3. Primary side system fault. a. Check the steam pressure before the high limit valve or before the pressure reducing valve (if fi tted). If the steam pressure is decreasing under normal conditions, there may be insuffi cient steam available to meet the higher hot water demands.

If the “Low Surface Temperature” option is fi tted ensure the control valve is set 30 second travel time. Refer to the actuator IOM for more information.b. The demand from the hot water system is greater than the designed capacity of

the PHE. Take measures to reduce Secondary Side hot water demand.

4. DRV80 display shows any of the following.

1. System fault. a. Water supply problem. Check supply temperature between PHE and DRV80.b. Perform hard set: Turn power to DRV80 off 10 seconds and restart.

2. DRV80 fault. a. Spool sticking. Clean and descale spool. Renew separator seal and lubricate assembly.b. Refer to DRV80 display error messages.

a. System does not fully return to normal temperature within the “Disinfection Timeout” period. Check the following: • Disinfection Timeout value (Valve Setup: screen). • Cool down start and fi nish times. • Use Dump Valve to speed up Cool Down time.b. Early abort of disinfection process.


43

Troubleshoot Guide

Problem Cause Solution

5. Constant difference between Secondary Side system temperature and DRV80 display.

1. Secondary Side system fault. a. Outlet thermometer inaccurate - replace.

2. DRV80 fault. a. Thermistor problem - refer to thermistor error message.

6. Reduced heater capacity. 1. PHE fault. a. Heat exchanger may be becoming blocked due to scaling. Clean the heat exchanger using a suitable de-scaling fl uid via the CIP connections. If the heat exchanger has become completely blocked then dismantle and clean the heat exchanger as per the relevant IOM.

7. Unable to adjust Secondary Side system temperature.

1. Digital-Flo fault. a. Pump fl ow rate to low. Reset circuit fl ow rate. Check for blocked fi lters, closed valves, air locks, pump failure, etc .

b. Return temperature less than 2°F below DRV80 set point. Ensure minimum temp drop around circuit of 2°F.

c. Check valve problem. Make sure placement of check valve is correct. Refer to installation schematics. Ensure that check valves are fully functional.d. Water Pressure. Ensure maintained supply pressures are balanced. Ensure that there is mixed return to water heater.e. Flow problem. Check for air locks, blocked fi lters, closed valves etc.f. Maintained supply pressures are unequal. Ensure that pressures are balanced. Check for blocked fi lters, closed valves, air locks etc.g. Supply temperatures. Check for reasonable temperature differential between set point and hot and cold inlet supply temperatures to DRV80.

1. DRV80 fault. a. Refer to DRV80 display error messages.

8. No display on DRV80 and/or no control.

1. Secondary Side system fault. a. No power to DRV80 - Check electrical supply.

2. DRV80 fault. a. Internal power connection or display connection is loose or not made. Check and reconnect.b. DRV80 power transformer has failed – replace.c. Internal fuse failure – replace fuse and investigate cause.d. PCB failure - replace.

9. High pitched noise from DRV80. 1. Secondary Side system fault. a. Maintained supply pressures are unequal. Ensure that pressures are balanced. Check for blocked fi lters, closed valves, air locks etc.b. Supply temperatures. Check for reasonable temperature differential between set point and hot and cold inlet supply temperatures to DRV80.

2. DRV80 fault. a. Motor is worn – replaceb. Refer to DRV80 display error messages.

10. Water leaking from DRV80. 1. DRV80 fault. a. Check all seals for wear and/or damage. Clean, lubricate or replace.b. Body casting failure - replace DRV80.

11. Water/moisture visible in DRV80 cover.

1. DRV80 fault. a. Water left in DRV80 during previous maintenance, interior of cover must be kept dry, as moisture will condense and corrode PCB.

b. Check thermistor seals for wear and/or damage. Clean, lubricate or replace.

12. Water leaking from plate & frame module.

1. PHE fault. a. Note serial number on PHE and refer to IOM guide for specifi c PHE module supplied with heater.


44

Item DescriptionD1S D2S D3S D4S

Part Number

ConnectionSize

Part Number

ConnectionSize

PartNumber

ConnectionSize

PartNumber

ConnectionSize

A Plate & Frame HX D28017D28027

SWDW

D28018D28028

SWDW

D28019D28029

SWDW

D28020D28030

SWDW

B Trap D501988 1” (25 mm) D500056 1.5” (40 mm) 5000690 1.5” (40 mm) C6126 2” (50 mm)

C Pressure Relief Valve D8312 N/A D8312 N/A D8312 N/A D8312 N/A

D Steam Shut Off Valve D27562 2.5” (63.5 mm) D2763 3” (80 mm) D27563 3” (80 mm) D27565 6” (153 mm)

E Ball/Butterfl y Valve D10182 1” (25 mm) D9341 1.5” (40 mm) D10275 2” (50 mm) D15147 3” (80 mm)

F Gate Valve D7341 1” (25 mm) D8967 1.5” (40 mm) D7343 2” (50 mm) D7345 3” (80 mm)

G Thermometer D8931 2.5” (63.5 mm) D8969 4” (102 mm) D8969 4” (102 mm) D8746 6” (153 mm)

H Thermowell D8933 2.5” (63.5 mm) D8970 4” (102 mm) D8970 4” (102 mm) D8747 6” (153 mm)

I Terminator (Ball/Strainer Combo) Valve D10763 1” (25 mm) D10769 1.5” (40 mm) D10292 2” (50 mm) D17889 3” (80 mm)

J Spring Check Valve D10779 1” (25 mm) D10770 1.5” (40 mm) D10293 2” (50 mm) D8745 3” (80 mm)

K Swing Check Valve D7347 1” (25 mm) D8964 1.5” (40 mm) D7349 2” (50 mm) D8745 3” (80 mm)

L Actuator D28688 N/A D28688 N/A D28688 N/A D28688 N/A

M DRV80 D6774 2” (50 mm) D677 3” (80 mm) D6774 3” (80 mm) D6774 3” (80 mm)

N Controller Panel D29952 N/A D29952 N/A D29952 N/A D29952 N/A

O Swing Check Valve D7347 1” (25 mm) D7347 1” (25 mm) D7349 2” (50 mm) D7349 2” (50 mm)

P Terminator Valve D10763 1” (25 mm) D10763 1” (25 mm) D10292 2” (50 mm) D10292 2” (50 mm)

Q Swing/Spring Check Valve D7347 1” (25 mm) D10779 1” (25 mm) D10779 1” (25 mm) D10779 1” (25 mm)

R Thermometer D8931 2.5” (63.5 mm) D8969 4” (102 mm) D8969 4” (102 mm) D8969 4” (102 mm)

S Thermowell D8933 2.5” (63.5 mm) D8970 4” (102 mm) D8970 4” (102 mm) D8970 4” (102 mm)


Component Identifi cation Guide

45

Notes

46

Armstrong Hot Water Group221 Armstrong Blvd., Three Rivers, Michigan 49093 - USA Ph: (269) 279-3602 Fax: (269) 279-3130armstronginternational.com Toll Free: (888) HOT-HOSE

IOM-786-B 6/11 Printed in U.S.A.

Armstrong Hot Water Group Warranty

Armstrong Hot Water Group, Inc. (“Armstrong”) warrants to the original user of those products supplied by it and used in the service and in the manner for which they are intended, that such products shall be free from defects in material and workmanship for a period of one (1) year from the date of installation, but not longer than 15 months from the date of shipment from the factory [unless a Special Warranty Period applies, as listed below]. This warranty does not extend to any product that has been subject to misuse, neglect, or alteration after shipment from the Armstrong factory. Except as may be expressly provided in a written agreement between Armstrong and the user, which is signed by both parties, Armstrong DOES NOT MAKE ANY OTHER REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR ANY IMPLIED WARRANTY OF FITNESS FOR A PARTICULAR PURPOSE. The sole and exclusive remedy with respect to the above limited warranty or with respect to any other claim relating to the products or to defects or any condition or use of the products supplied by Armstrong, however caused, and whether such claim is based upon warranty, contract, negligence, strict liability, or any other basis or theory, is limited to Armstrong’s repair or replacement of the part or product, excluding any labor or any other cost to remove or install said part or product, or, at Armstrong’s option, to repayment of the purchase price. As a condition of enforcing any rights or remedies relating to Armstrong products, notice of any warranty or other claim relating to the products must be given in writing to Armstrong: (i) within 30 days of last day of the applicable warranty period, or (ii) within 30 days of the date of the manifestation of the condition or occurrence giving rise to the claim, whichever is earlier. IN NO EVENT SHALL ARMSTRONG BE LIABLE FOR SPECIAL, DIRECT, INDIRECT, INCIDENTAL OR CONSE-QUENTIAL DAMAGES, INCLUDING, BUT NOT LIMITED TO, LOSS OF USE OR PROFITS OR INTERRUPTION OF BUSINESS. The Limited Warranty and Remedy terms herein apply notwithstanding any contrary terms in any purchase order or form submitted or issued by any user, purchaser, or third party and all such contrary terms shall be deemed rejected by Armstrong.

Special Warranty Periods are as follows:

Flo-Direct Gas Fired Water Heater—The stainless steel structure and stainless steel internals shall have a 10-year guarantee against failure caused by materials or workmanship provided by Armstrong. All external componenets shall have a 2-year guarantee against failure caused by materials or workmanship provided by Armstrong.

digital-flotm digital instantaneous steam/water plate & frame heat … · 2011. 6. 16. · 5...

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