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