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Multi Tenant HVAC Systems
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Agenda
• Who Is Jacco
• What Is A Multi Tenant Facility?
• What HVAC Systems Can Function In These Facilities?
• How Can We Grade An HVAC System For These Facilities?
• Review Various Systems
• Summary Of Systems
• Project Profiles
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• Established 1968 – Hudson, Ohio – Columbus, Ohio – Toledo, Ohio
• Focused on the Engineered Environment
– Systems Knowledgeable • HVAC Systems • Service & Maintenance • Parts
• Full Circle Support • 30 Minute Design
Who is Jacco
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•Operations Group –Brenda Homjak
–Mike Spangler
–Chad Russell
Who is Jacco
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Purpose Statement
The purpose of our Company is to solve our customers problems, in the most economical way, at all times optimizing the owning experience.
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•30 Minute Design –Unit Performance
–Drawing
–Weights
–Electrical
–Specifications?
–Sequence of Operation?
–Cartoon?
–Narrative?
Who is Jacco
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2015 Seminars
Who is Jacco
Seminars Instructor Date Psychrometrics JKC 14-Jan
The Refrigeration Cycle JKC 11-Feb
Energy Recovery GAD 11-Mar
Applied Rooftop Systems JKC 8-Apr
VRF Design & Installation GAD 13-May
Geothermal Systems GAD 10-Jun
Chilled Beam, Radiant Cooling & DOAS JKC 12-Aug
Vertical Market Systems GAD 9-Sep
Building Pressure & Air Flow Measurement GAD 14-Oct
Controlling HVAC Systems - Sequence of Operations JKC 11-Nov
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Multi Tenant Facilities
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List Some Multi Tenant Facilities
• Hotels/Motels
• Assisted Living
• Dorms
• Condos
• Resorts
• Apartments
• Mixed Use Buildings
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HVAC Systems
• PTAC
• One To One Mini Splits
• Packaged Indoor Units
• Fan Coil
• Heat Pump
• VRF
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How Do We Evaluate These Systems
• Comfort
• Flexibility
• Redundancy
• Equipment Cost
• Installation Cost
• Energy Efficiency
• Controls
• Maintenance
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PTAC
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PTAC
System
• Air Cooled/Heat Pump/Gas Heat
• DOAS
• Separate Systems for Large/Common Areas
Comfort
• Multi Speed Fans (Manual Change)
• Potential IAQ Issues
• Loud
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PTAC
Flexibility
• Typically 4 Sizes Ranging 0.5-1.5 Tons
• Any Number Floors
• Eliminate Diversity
Redundancy
• Quick Changeout Of Chassis
• Some Have Dual Fans
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PTAC
Equipment Cost
• Low Cost
Installation Cost
• Wall Sleeve
• Electrical
• Thermostat (?)
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PTAC
Energy Efficiency
• 10-12 EER
• Some Have 2 Stage Compressors
Controls
• Unit Mounted
• Remote Mounted
• Wireless Stat
• InComm Communications
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PTAC
Maintenance
• Clean Filters
• Inspect Electrical Connections, Fans, Compressors
• Maintain Spare Chassis And Quick Changeout
• No System Diagnostics
• Multiple Manufacturers Fit Same Chassis – Watch Out For Specialty Ones
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One To Mini Splits
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Mini Splits
System
• Heat Pump
• Fan Coil Units
• DOAS
Comfort
• Low Sound
• Multi Speed Fans
• Electronic Expansion Valves
• Variable Speed Compressors
• Heat Capacity?
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Mini Splits
Flexibility
• 4 Cooling Only/Heat Pump Models From 0.75-2 Tons
• 5 Indoor Models From 0.5 to 2 Tons
• Max Line Length 50-100’
• Max Vertical Rise 25-100’
• Eliminate Diversity
Redundancy
• Each System Is Standalone – 1 Goes Down, Doesn’t Affect Entire Building
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Mini Splits
Equipment Cost
• Moderate Cost
Installation Cost
• Heat Pump
• Electric Heat (?)
• Refrigerant Piping
• HP, FCU, Thermostat & Comm. Wiring
• Concrete Pad / Roof Rails
• Power For HP, FCU, EH
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Mini Splits
Energy Efficiency
• 13-15 EER, 20-23 SEER
• Modulating Compressors
• Multi Speed Evaporator Fans
• Electronic Expansion Valves
Controls
• Wireless or Wired Controller
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Mini Splits
Maintenance
• Indoor Units – Removable Panels For Filter, Fan, Coil Access
– Clean Filter
– Check Fans
– Check/Clean Fan, Coil, Cond Drain, Elect Conn
• Outdoor Units – Check/Clean Condenser Coils, Fans, Elect Conn
– Check Compressors
• Must Be Replaced With Same Mfr
• Where are the CU/HP’s Located?
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Packaged Indoor Units
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Packaged Indoor Units
System
• Indoor Packaged Electric Cooling/Gas Heat
• DOAS
Comfort
• ECM Fans
• Medium Compressor Noise
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Packaged Indoor Units
Flexibility
• 9 Models From 1-3 Tons
• Can Serve Multiple Rooms From Single Unit
• No Limit On Number Floors
• Must Be On Outside Wall
Redundancy
• Each System Is Standalone – 1 Goes Down, Doesn’t Affect Entire Building
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Packaged Indoor Units
Equipment Cost
• Slightly Higher Than PTAC
Installation Cost
• IPU
• Gas Piping
• IPU & Thermostat Wiring
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Packaged Indoor Units
Energy Efficiency
• 10-11 EER, 11-12.5 SEER
• Modulating Compressors
• Multi Speed Evaporator Fans
• Electronic Expansion Valves
Controls
• Wired Thermostat
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Packaged Indoor Units
Maintenance
• Indoor Units – Removable Panels For Filter, Fan, Coil Access
– Clean Filter
– Check Fans
– Check/Clean Fan, Coil, Cond Drain, Elect Conn
– Check/Clean Cond Coils, Fans, Elect Conn
– Check Compressors
• Can Be Replaced With Different Manufacturer
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Fan Coil Units
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Fan Coil Units
System
• Indoor CW/HW Fan Coils
• Typical 4 Pipe
• DOAS (?)
• AHU’s For Larger Areas
• Chiller
• Boiler
• Pumps
• Controls
Comfort
• Modulating Heating & Cooling
• ECM/VFD Controlled Fans
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Fan Coil Units
Flexibility
• Unlimited FCU/AHU Sizing, Position – Horizontal, Vertical, Stacker
• Unlimited Chiller/Boiler/Pump Sizing
Redundancy
• Each FCU/AHU Is Standalone – 1 Goes Down, Doesn’t Affect Entire Building
• Redundancy In Chillers, Boilers, Pumps? – Need For Space, Power, Etc.
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Fan Coil Units
Equipment Cost
• Moderate To High
Installation Cost
• Fan Coil
• Chiller
• Boiler
• Pumps
• Electrical For Each
• Gas Piping
• Individual Control & System Communication Wiring
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Fan Coil Units
Energy Efficiency
• Each Component Has Own Efficiency – Chillers Up To 28 EER
– Boilers Up To 98%
– Pumps Up To 90%
• Modulating Compressors
• Multi Speed Evaporator Fans
• Modulating Valves
Controls
• Individual Thermostat
• Communications System With PC Front End
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Fan Coil Units
Maintenance
• FCU Units – Removable Panels For Filter, Fan, Coil Access
– Clean Filter
– Check Fans
– Check/Clean Fan, Coil, Condensate Drain, Electrical Connections
• Chiller – Check Compressor, Electrical Connections
– Tubes? Brazed Plate?
– Air Cooled/Water Cooled?
• Boiler – Check Burner, Water, Electrical Connections
• Pumps – Check Pump, Electrical Connections
• Units Can Be Replaced With Different Manufacturer
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Heat Pumps
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Heat Pumps
System
• HP’s
• DOAS
• Tower/Boiler/Pumps
• Geothermal Well Field/Pumps
Comfort
• Multi Speed Fans
• Variable Speed Compressors
• Moderate Noise
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Heat Pumps
Flexibility
• Available Indoor/Outdoor from 0.5-300 Tons
Redundancy
• Each HP Own System
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Heat Pumps
Equipment Cost
• Moderate To High
Installation Cost
• Geothermal (High)
• Water Source (Moderate) – Cooling Tower
– Pumps
– Boiler
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Heat Pumps
Energy Efficiency
• Up To 22 EER
• Heat Recovery
• Modulating Compressors
• ECM/VFD Evaporator Fans
Controls
• BACnet, Lon
• Tenant Billing
• Touchscreen Or PC Interface
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Heat Pumps
Maintenance
• Indoor Units – Removable Panels For Filter, Fan, Coil Access
– Clean Filter
– Check Fans
– Check/Clean Fan, Coil, Cond Drain, Comp, Elect Conn
• Cooling Tower – Check/Clean Fan, Coil, Water Quality, Chemicals
• Boiler – Check/Clean Burner, Water Quality, Elect Conn
• Well Field – Check/Clean Strainers, Water Quality
• Units Can Be Replaced With Different Manufacturers
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VRF
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VRF
System
• Heat Pump/Heat Recovery Units
• Fan Coil Units
• Mode Change Units
• DOAS
Comfort
• Multi Speed Fans
• Electronic Expansion Valves
• Variable Speed Compressors
• Heat Available To -4F
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VRF
Flexibility
• 20 Heat Recovery Systems Available From 6 to 44 Tons
• Heat Pumps Can Be Indoor/Outdoor and Air Cooled/Water Cooled
• 13 Indoor Models From 0.5 to 8 Tons – New Multi Position AHU (1-6 Tons)
– New Floor Standing Concealed or Exposed (0.5-2 Tons)
– New Large Under Ceiling Units (3-4 Tons)
• Diversity Range 50-130% Capacity
• 656’ Available Piping (130-360’ drop/lift)
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VRF
Redundancy
• Each HP/HR Has Minimum 2 Compressors
• Multiple HP/HR Per System
• Multiple Systems Per Project
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VRF
Equipment Cost
• Moderate To High
• Depends On Type Of FCU
Installation Cost
• Refrigerant Piping
• Power For HP, FCU, MCU
• Control Wiring
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VRF
Energy Efficiency
• 38 SCHE (Simultaneous Heating & Cooling Efficiency)
• Heat Recovery
• Modulating Compressors
• Multi Speed Evaporator Fans
• Electronic Expansion Valves
• Constantly Compared To Water Source & Geothermal
Controls
• BACnet, Lon
• Tenant Billing
• Touchscreen Or PC Interface
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VRF
Maintenance
• Indoor Units – Removable Panels For Filter, Fan, Coil Access
– Clean Filter
– Check/Clean Fan, Coil, Cond Drain, Elect Conn
• Heat Pump – Check/Clean Fan, Coil, Elect. Connection
• System Diagnostics
• Units Can Not Be Replaced With Different Manufacturers
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Summary
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System Cross Reference
PTAC Mini Splits Indoor Pkg FCU HP VRF
Air Cooled Y Y Y Y Y
Water Cooled Y Y Y
Comfort 1 3 3 5 4 5
Flexibility 1 2 1 5 5 5
Construction Cost 1 2 1 4 5 4
Efficiency 1 3 2 4 5 5
Maintenance 1 3 2 5 5 3
1 2 3 4 5
Low Moderate High
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Project Profiles
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52
Schofield Building
Project Profiles
• Mixed Use Facility
• Retail
• Hotel
• Condos
• Water Source
• (2) Dedicated OA Systems
• (129) Stacker HPs
• (19) Vertical HPs
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Tudor Arms Hotel
Project Profiles
• Hotel/Conference Center
• (5) Systems
• (186) FCUs
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AMHA Martin P Lauer Building
Project Profiles
• Metro Housing
• (104) Mini Splits
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Steel Mansion
Project Profiles
• Hotel
• (2) HP Systems
• (19) FCUs
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Thank You!