John Wood Superflue Power Vent (75 Gallon) - Manual (Page 32)

Installation
The heating mode may be one of the following options:
A
A fan coil (air handler)
B A hydronic baseboard (finned tube) loop/In-floor heating
Fan Coil
The following is a list of requirements for the installation of
the heating loop to the water heater (see Figure 28).
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.
Baseboard Radiator Heating
The following is a list of requirements for the installation of
the heating loop to the water heater (see Figure 29).
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. A drain valve must be installed at the lowest point of the
heating loop so that water can be drained from the heat-
ing module without affecting the water heater.
3. Install air bleed valves at the highest points to purge air
from the system.
Maintenance
The installation and maintenance of the water heater must
follow all of the instructions described in sections I to VII of
this manual. Heater failure that is a result of the heating sys-
tem is not covered by warranty.
– 32 –
SIDE-TAPPED PIPING OF GSW
POWER-VENTED GAS-FIRED
WATER HEATERS (INTERNAL
OR EXTERNAL CIRCULATOR)
IF USED CHECK VALVE
REQUIRES EXPANSION TANK
COLD SUPPLY
EXPANSION TANK
(OPTIONAL)
MIXING
VALVE
M
H
C
300mm (8 in.)
MAX.
HOT
OUTLET
COLD INLET
SUPPLY RETURN
WATER
HEATER
DRAIN PURGE V
A
LV
E
INTERNAL
CIRCULA
TO
R
EXTERNAL
CIRCULATOR
CHECK
VALVE
HOSE BIB
(OPTIONAL)
AIR HANDLER
HOT
W
A
TER T
O
HOUSE FIXTURE
HYDRONIC BASEBOARDS (SERIES CONNECTED SHOWN)
HOT
W
A
TER T
O
HOUSE FIXTURE
EXPANSION TANK
(OPTIONAL)
MIXING
VALVE
M
H
C
BASEBOARD PIPING OF
GSW POWER-VENTED
GAS-FIRED WATER
HEATERS (SIDE-TAPPED)
FLOW CONTROL FLOW CONTROL
Figure 28 Combo Heating - Air Handler Figure 29 Combo Heating - Baseboard
IF USED CHECK VALVE
REQUIRES EXPANSION TANK
COLD SUPPLY
300mm (8 in.)
MAX.
HOT
OUTLET
COLD INLET
SUPPL
Y
RETURN
WATER
HEATER
CIRCULATOR
CHECK
VALVE
HOSE BIB
(OPTIONAL)