5.3003.38 Condensate Drainage of Heating and Air Conditioning Equipment—Low Rise

Topic: 
Forced Air
Subtopic: 
System Assessment and Maintenance
Desired Outcome: 
Equipment and condensate drain operate as designed
TitleSpecification(s)Objective(s)
5.3003.38a
Connection

Connections in condensate drain system will be watertight

Ensure condensate drain connection does not leak

5.3003.38b
Insulation

Condensate drain lines will be insulated with a minimum 1" of insulation with a vapor retarder Vapor retarder A material that slows the passage of water vapor and contains a perm rating above 1 when there is potential for condensation or freezing on the drain line

Ensure condensate drain connections do not leak

5.3003.38c
Overflow protection: up flow

Secondary drain pan and float switch will be installed when overflow could damage finished surfaces or up flow systems will have a float switch installed in the primary condensate drain when overflow could damage finished surfaces

Float switch will be interlocked with the cooling circuit and will break the circuit when a leak occurs

Ensure condensate drain connections do not leak

5.3003.38d
Pumps

Condensate drain pumps will be installed when condensate cannot be drained by gravity

Power source for pumps will be installed

Operation and drainage of pump will be verified

Ensure condensate drain connections do not leak

5.3003.38e
Vents and traps

Vents and traps will be installed on condensate drain lines, including condensing heating systems in accordance with manufacturer specifications

For combustion-heating equipment, trap supplied with the equipment will be used in accordance with manufacturer specifications

Ensure condensate drain operates as designed

Ensure condensate drain does not leak

5.3003.38f
Drain pan

A secondary drain pan will be installed for all air conditioning, air handler, or evaporator coil installations where water damage may occur

The secondary pan will contain a drain, which will be ran separately from the primary condensate drain to a visible termination point

The secondary drain pan will be pitched toward the drain line to ensure that moisture is removed from the building

Prevent water damage from a malfunctioning drain system

To alert building owner or maintenance staff that a problem exists

5.3003.38g
Water level detection device

All secondary drain pans will have a water level detection device interlocked with the cooling control circuit that shuts down the unit when a leak occurs

Prevent water from overflowing the pan and draining onto the ceiling below

5.3003.38h
Termination

Condensate drain will be terminated in accordance with local codes

Ensure condensate does not leak into the building

Ensure condensate drain does not freeze