Installation - John Wood JWF307 Installation And Operating Instructions Manual

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.
HOT WATER
TO HOUSE
COLD SUPPLY
FIXTURE
MIXING
VALVE
C
M
H
200mm TO
300mm (8 in.
TO 12 in.)
HOT
OUTLET
WATER
HEATER
Figure 14 Combo Heating - Air Handler
CHECK VALVE (IF
USED REQUIRES
EXPANSION TANK)
EXPANSION TANK
(OPTIONAL)
CHECK
FLOW
VALVE
CONTROL
EXTERNAL
COLD CIRCULATOR
INLET
HOSE BIB
(OPTIONAL)
RETURN
SUPPLY
DRAIN/PURGE
VALVE
INTERNAL
CIRCULATOR
AIR HANDLER
HOT WATER
TO HOUSE
FIXTURE
MIXING
VALVE
C
M
H
200mm TO
300mm (8 in.
TO 12 in.)
HOT
OUTLET
WATER
HEATER
Figure 15 Combo Heating - Baseboard
HOT WATER
TO HOUSE
FIXTURE
MIXING
VALVE
C
M
H
200mm TO
300mm (8 in.
TO 12 in.)
HOT
OUTLET
WATER
HEATER
Figure 16 Combo Heating - In-Floor Loop
– 21 –
COLD SUPPLY
CHECK VALVE (IF
USED REQUIRES
EXPANSION TANK)
EXPANSION TANK
(OPTIONAL)
FLOW
CONTROL
COLD
INLET
SUPPLY
COLD SUPPLY
CHECK VALVE (IF
USED REQUIRES
EXPANSION TANK)
EXPANSION TANK
(OPTIONAL)
FLOW
CONTROL
COLD
INLET
SUPPLY
CHECK
VALVE
EXTERNAL
CIRCULATOR
HOSE BIB
(OPTIONAL)
RETURN
HYDRONIC
BASEBOARDS
(SERIES CON-
NECTED
SHOWN)
CHECK
VALVE
EXTERNAL
CIRCULATOR
HOSE BIB
(OPTIONAL)
RETURN
HYDRONIC
IN-FLOOR
LOOP