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Installation
The heating mode may be one of the following options:
1. A fan coil/air handler (Figure 14).
2. A hydronic baseboard (finned tube) loop (Figure 15).
3. A hydronic in-floor heating loop (Figure 16).
The following is a list of requirements for the installation of
the heating loop to the water heater.
1. Install shut-off valves and unions so that the water
heater can be isolated from the heating module should
servicing of the water heater become necessary.
2. Install a drain valve at the lowest point of the heating
loop so that water can be drained from the heating mod-
ule without affecting the water heater.
3. If the air handler does not have a venting means at the
highest point of the piping arrangement, install an air
bleed at the highest point of the plumbing arrangement.
4. If solenoid valves are used for zone heating applica-
tions, they must include electrical proof of valve full
open position and must be connected to the water
pump.
WATER
HEATER
200mm TO
300mm (8 in.
TO 12 in.)
HOT
OUTLET
EXPANSION TANK
(OPTIONAL)
MIXING
VALVE
COLD
INLET
CHECK VALVE (IF
USED REQUIRES
EXPANSION TANK)
COLD SUPPLY
HOSE BIB
(OPTIONAL)
FLOW
CONTROL
SUPPLY
RETURN
CHECK
VALVE
EXTERNAL
CIRCULATOR
AIR HANDLER
HOT WATER
TO HOUSE
FIXTURE
Figure 14 Combo Heating - Air Handler
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INTERNAL
CIRCULATOR
DRAIN/PURGE
VALVE
WATER
HEATER
200mm TO
300mm (8 in.
TO 12 in.)
HOT
OUTLET
EXPANSION TANK
(OPTIONAL)
MIXING
VALVE
COLD
INLET
CHECK VALVE (IF
USED REQUIRES
EXPANSION TANK)
COLD SUPPLY
HOSE BIB
(OPTIONAL)
FLOW
CONTROL
SUPPLY
RETURN
CHECK
VALVE
EXTERNAL
CIRCULATOR
HYDRONIC
BASEBOARDS
(SERIES CON-
NECTED
SHOWN)
HOT WATER
TO HOUSE
FIXTURE
Figure 15 Combo Heating - Baseboard
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WATER
HEATER
200mm TO
300mm (8 in.
TO 12 in.)
HOT
OUTLET
EXPANSION TANK
(OPTIONAL)
MIXING
VALVE
COLD
INLET
CHECK VALVE (IF
USED REQUIRES
EXPANSION TANK)
COLD SUPPLY
HOSE BIB
(OPTIONAL)
FLOW
CONTROL
SUPPLY
RETURN
CHECK
VALVE
EXTERNAL
CIRCULATOR
HYDRONIC
IN-FLOOR
LOOP
HOT WATER
TO HOUSE
FIXTURE
Figure 16 Combo Heating - In-Floor Loop
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