Equipment
Centrifugal Chillers
Manufacturer: Trane or McQuay
Reciprocating/Scroll Chillers
Manufacturer: Trane, York or Carrier
Residential Cooling Systems
- Manufacturer: Carrier or Trane
- Filters to be accessible without removing panel covers
Energy Control System
Residential
- Manufacturer: Carrier or Trane
- Nonprogrammable room thermostats
- Carrier model Debonair 71 preferred
- Internal limit settings ( separate setpoints for heating and cooling max/min temp)
- Winter max 76 degrees F, Summer min 70 degrees F
- Secure access to limit settings
- No batteries
- Not on central energy system
Non Residential
- Manufacturer: Automated Logic, Johnson Controls, or Trane Tracker
- Central energy system
- Room thermostats with set point by BAS and +/- 3 degree adjustment by occupant., (rotary dial is acceptable if dial can be disabled)
- Economizer mode preferred with enthalpy control
- Provide changeable reset schedule for HW heat and CHW cooling
Control Requirements – Minimum
Air Handlers
HW & CHW valves to be Proportional Control, EMS Sensors to read:
- Room return air temperature, humidity, mixed air temperature, supply air temperature
- Fan start/stop, fan status, cfm
- VSD status ( inlet vane damper position)
- Static pressure
- HW & CHW valve position
- Damper positions
VAV Boxes
HW & CHW valves to be Proportional Control, EMS Sensors to read:
- Discharge temp
- Fan start/stop, fan status, cfm
- Damper position
- Valve position
Chillers
EMS Sensors to read:
- Start/stop ( enable/disable)
- Pumps start/stop and status
- Automatic alternating lead/lag for multiple chillers/pumps
- CHW supply/return temperature & valve position
- Condenser water supply/return temperature & valve position
- Outside air temperature and humidity
Boilers
EMS Sensors to read:
- Start/stop ( enable/disable)
- Pumps start/stop and status
- HW supply/return temperature
- HW valve position
- Automatic alternating lead/lag for multiple boilers
Variable Speed Drives
VSD to have internal line bus reactor and an undervoltage/overvoltage protection relay to protect the bypass control circuitry
General Notes
- Copper pipe to be Type L or K only
- Pumps to be Bell & Gossett, Weinman, or Armstrong
- Exterior piping: All non-metallic pipes to have #14 tracer wire stubbed up at proper access points (valve box, eqpt room, etc.)
- Install floor drain in all mechanical rooms with air handling units
- EMS to provide graphics for all sensor data