installation & application guidelines for airsys stand alone free...

FCB

Product Information

136 W. Canon Perdido St., Suite 100, Santa Barbara CA 93101 www.tempesttelecom.com

HVAC Support: 855-874-5380 / 805-879-4807 [email protected]

Installation & Application Guidelines

For AIRSYS Stand Alone Free Cooling Box

Model

FCB PCK36F2

CONTENTS

Product Introduction

Locating the FCB on the Shelter

Electrical Connections

FCB Specifications

Product and est. installation costs

FCB

Product Information



Product Introduction The AIRSYS FCB (Free Cooling Box) is one of several energy saving AIRSYS HVAC products

available to Verizon Wireless. The FCB system described in this document is a stand-alone

economizer that can be installed into a shelter configured with any existing 3rd

party HVAC

systems. When installed, the FCB takes master control over the existing HVAC system to

manage the environment for lowest cost operation.

The FCB has two key benefits:

1. Optimization of free air cooling Free Air Cooling Defined: Simply put, is using the outside air to cool a shelter instead of

running a compressor to cool. The AIRSYS FCB consumes 1% to 10% of the energy to cool

a site when compared to a compressor trying to cool the same site. There are some

limitations to the ability to Free Cool:

Outside temperature must be cooler than inside temperature. In fact the colder the outside air

the greater the cooling capacity of the FCB. As the outside air temperature warms up to the inside

air temperature the FCB will be unable to cool the site sufficiently to keep it with the set points

(77+2/-4°F). It is at this point the FCB will allow the existing HVAC system to provide cooling.

Relative Humidity in the shelter must stay below 85%. In order to prevent water vapor from

condensing on sensitive electronic equipment, the relative humidity inside the shelter is managed

by a humidity sensor that is part of the FCB control package.

Getting to the highest energy efficiency:

As stated above the FCB requires<10% of the energy consumed by a standard HVAC

system, to keep a site cool. As such the more the FCB can run the more energy is saved.

The AIRSYS FCB is designed to provide cooling benefit even when the outside temperature

is nearly equal to the inside temp. This is mostly due to the fact that the air being exhausted

at the site is extracted up higher, which is commonly much warmer air than the nominal

inside temperature. AIRSYS has years of experience optimizing their control schemes to

remove as much heat as possible while consuming the least amount of energy.

2. DC operation to preserve cooling during prime power outages. Shelters with no generator on site: The loss of prime power often means the loss of air

conditioning. Once the air conditioning is lost many sites will last 45 – 90 minutes before

shelter temperatures rise enough to cause critical equipment failures (>110 °F). If you have a

DC powered FCB installed the site can maintain temperature with a small additional load on

the DC reserve. Even if the outside temperatures are higher than the inside temperature, a

DC powered FCB will provide emergency ventilation to stave off the rise in site temp and

improve site reliability.

FCB

Product Information



Physical Location of the FCB

Where on the shelter should the FCB be located?

FCB location is best if it can be located according to the drawing below:

Mounted on short side of the shelter so there is maximum Air flow

Centered on the wall to facilitate good air flow

With a minimum of 24“ clearance between supply vent and partial1 blockage

Do not place directly behind complete supply blockage suck as a battery bank.

1. Partial is referring to an open equipment rack whereby the space in the rack directly in front of the supply air

grill is at least 50% open.

Recommended

Clearance

Equipment Shelter

Good

Rack1 Rack2

Rack3 Rack4 Rack5

BEST BEST

OK

OK Good

Good

Good

OK OK

FCB OK OK

Least

desirable

Least

desirable

Least

desirable

Least

desirable

24” clearance

FCB

Product Information



AIRSYS

FCB

3rd Party

HVAC 2 3rd Party

HVAC 1

FCB

Product Information



EXTERNAL DIMENSIONS

Dimensions of Basic Unit for Architectural and Installation Requirements (Nominal) NOTE: Dimensional tolerance ± 1/16” (2 mm)

MODEL UNIT WIDTH

(W/W’)

DEPTH

(D)

HEIGHT

(H)

SUPPLY RETURN

A B C B E F G I J K L M N

36F2 MM 830/750 635 1620 438 615 240 615 828 50 790 630 169 131 107 50 1600

IN 32.68/29.53 25 63.78 17.24 24.21 9.45 24.21 32.6 1.97 31.1 24.8 6.65 5.16 4.23 1.97 62.99

Supply air

Discharge

AIR

Air Inlet

Return air

Air Inlet

Discharge AIR

O

W'

HW

B

B

L

MM

II

J

CE

AF

G

K

D

FCB

Product Information



Electrical Connections for the FCB

Electrical Connection List

# Connection Description

1 *HVAC1 Control Prevents operation of HVAC 1 when FCB relay KA1 is open

2 *HVAC2 Control Prevents operation of HVAC 2 when FCB relay KA2 is open

3 48 VDC Supplies operating power to FCB (10 Amps MAX)

4 Earth Ground Should meet local electrical codes

5 Smoke/Fire Alarm Input SignalForm C contact relay that can be NO or NC

(6) FCB Alarm (Optional) Output Signal Indicates FCB has a fault (NO or NC)

(7) Diesel Generator run (Optional) Input Signal Indicates generator is running (NO or NC)

* This connection is made as an interrupt in the low voltage control line from the HVAC controller to

each HVAC. Consult the HVAC controller manual for details on choosing a low voltage line for HVAC 1

and HVAC 2.

HVAC1 HVAC2

FCB

HVAC controller

48 VDC Rectifier

Smoke/Fire detector

HVAC1 Control Break In

HVAC2 Control Break In

-48 VDC In

-48 VDC Rtn

Smoke/Fire

alarm signal

Earth

Ground

1 2

3

4

5

FCB

Product Information



Field Wiring Power & Control

Field WIRING Alarm Connections

FCB

Product Information



Field Wiring Alarm Connections

5 Required: o NAME: Fire/Smoke Alarm Input o CONFIG: NC or NO via software (NC default) o CONNECT: J4 ID4 & IDC1 Shuts down outside Air damper and HVACs

6 Optional: o NAME: FCB Alarm Output o CONFIG: NC via NC5 or NO via NO5 o CONNECT: J11 C5 and NC5 or NO5 Provides signal to NOC that maintenance is needed

7 Optional: o NAME: DG Run Alarm o CONFIG: NC or NO via software (NC default) o CONNECT: J4 ID1 & IDC1 Shuts outside Air damper when DG is running

FCB Alarm

Output

J11

Smoke/Fire Alarm

Input

J4: ID4 & IDC1

DG Run

Input

J4: ID1 & IDC1

5

7

6

FCB

Product Information



FCB Performance & Mechanical Specifications

For more information contact Tempest Telecom Solutions:

(855) 874-5380

[email protected]

OPCK18F1 OPCK36F2

TBD 5100007560

Power Input kW 0.2 0.40

Air Volume CFM 854 1,800

kW 2.4 5.0

Btu 8,164 16,880

kW 4.8 9.90

Btu 16,327 33,770

kW 5.7 11.9

Btu 19,593 40,530

Width in 25.6 29.5

Depth in 21.7 24.8

Height in 52.0 63.8

Weight lbs 143.3 253.5

48VDC

EC Centrifugal Fan

Power supply

Type

Model

Capacity

Fan

Dimensions &

Weight

Sensible

cooling capacity

△t=5

℃

/9°F

△t=10

℃

/18°F

△t=12

℃

/21.6°F

Product No.

Model

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