5.3003.37 Heating and Cooling Controls—Low Rise

Topic: 
Forced Air
Subtopic: 
System Assessment and Maintenance
Desired Outcome: 
Heating and cooling controls installed and set properly
For supporting material, see Referenced Standards.
TitleSpecification(s)Objective(s)
5.3003.37a
Removal of mercury-based thermostats

Mercury-based thermostats will be removed safely and disposed of in accordance with EPA EPA U.S. Environmental Protection Agency, www.epa.gov regulations

Protect workers and occupants from injury

Protect the environment from damage

5.3003.37b
Removal of existing controls

Existing controls will be removed in accordance with EPA EPA U.S. Environmental Protection Agency, www.epa.gov lead-safe work rules

Protect workers and occupants from injury

Protect environment from damage

5.3003.37c
Penetrations

Penetrations for control wiring will be sealed with a durable sealant (e.g., caulk, silicone, foam)

Penetrations through fire walls will be sealed with a fire-rated material

Ensure controls operate as designed

Minimize infiltration Infiltration The uncontrolled passage of outside air into a building through unintended leaks in the building envelope and exfiltration Exfiltration The uncontrolled passage of inside air out of a building through unintended leaks in the building envelope from building

Prevent pest infestation

5.3003.37d
Thermostat location

Thermostats will be installed to reflect the temperature of the zone in which they are installed

Thermostats will not be exposed to extreme temperatures, radiant heat sources, warm/cold walls, and drafts

Ensure controls operate as designed

5.3003.37e
Blower speed

Total airflow will be measured in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Standard 5 or ANSI ANSI American National Standards Institute, www.ansi.org / ASHRAE ASHRAE American Society of Heating, Refrigerating and Air-Conditioning Engineers, www.ashrae.org Standard 111 and adjusted to meet design requirements

Ensure the equipment has correct air flow

5.3003.37f
Thermostat selection: heat pump

A thermostat with equipment supplementary heat lockout that can interface with an outdoor temperature sensor will be selected

Maximize the heating output of the compressor (heat pump mode eliminates supplementary heat) to achieve energy efficiency

5.3003.37g
Heat pump: supplementary heat

Thermal and economic balance point will be calculated and an optimum thermal balance point will be selected in accordance with ANSI ANSI American National Standards Institute, www.ansi.org / ACCA ACCA Air Conditioning Contractors of America, www.acca.org Manual S

The design of variable refrigerant flow systems are permitted to not require supplementary heat

Maximize the heating output

Maximize the heating output of the compressor (heat pump mode eliminates supplementary heat) to achieve energy efficiency

5.3003.37h
Heat pump: outdoor temperature sensor

An outdoor temperature sensor will be installed in accordance with manufacturer specifications

Ensure equipment operates as designed

5.3003.37i
Heat pump: supplementary heat control wiring

Supplementary heat will be wired onto second stage heating terminal (W2)

Do not operate supplementary heat in stage one heating

5.3003.37j
Thermostat: installer programming

The installer options will be set to match the thermostat to the equipment and control board settings

Ensure equipment operates as designed

5.3003.37k
Time delay settings

Time delay for equipment will be set in accordance with manufacturer specifications and as appropriate for the climate zone (e.g., no time delay for hot humid climates)

Maximize the transfer of the heat without adversely affecting indoor humidity levels

5.3003.37l
Humidistat: location

Humidistat will be installed to accurately reflect humidity of the zone in which it is installed

Ensure controls operate as designed

5.3003.37m
Occupant education

Occupants will be educated on proper use of thermostat, including:

  • Proper use of setbacks for air conditioners and heat pumps
  • Allowing occupant comfort to determine setback for combustion-heating appliances
  • Using emergency heat appropriately

Ensure equipment and controls operate as designed

Provide comfort throughout building

5.3003.37n
Central controller

Wiring and sensors will be installed in accordance with manufacturer specifications

Educate building manager to monitor and control the entire building