65
16 Plumbing Applications
Gas Supply
Backflow
Preventer
(optional)
Cold Water
Supply
Hot Water
Hot Water Return Line
Fixtures
Air Handler
Flow Switch
Set the flow switch to deactivate
the Air Handler when the
domestic hot water flow reaches
3 GPM (11.3 L/min).
Adjust as necessary to prevent
cycle.
Service Valve Kit with Pressure Relief Valve
It is recommended the use of Service Valve
Kit with Pressure Relief Valve with the
installation. This kit includes an integrated
shut-off and service valve with unions and a
pressure relief valve.
Mixing Valve
If the system requires water for space
heating at temperatures higher than
required for other uses, a means such as
a mixing valve shall be installed to
temper the water for those uses in order
to reduce scald hazard potential.
Drain Valve
Valve
Air Vent and Air Out
Check Valve
Check Valve required if it is
not included with the pump.
Optional Expansion Tank
Expansion tank required if a
backflow preventer is installed.
Air Vent
Air Out
Pump
Size the pump to provide a
maximum of 3 GPM (11.3
L/min) with a head pressure
equal to the loss through
the water heater and Air
Handler.
Combination Potable Water and Space Heating System
• The Water Heater cannot be used for space heating applications only.
• Only POTABLE water may be plumbed through the Water Heater.
• Change the recirculation setting to “Always Recirc ON” mode referring to page 59.
• Crossover valve is not available for the Space Heating system.
Plumbing Applications
Summary of Contents for GQ-C3260WXQ-FF PB US
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