John Wood Superflue Power Vent (75 Gallon) - Manual (Page 19)

• Fill the tank with water and check all connections for
leaks. Open the nearest hot-water faucet and let it run
for 3 minutes to purge the water lines of air and sedi-
ment and to ensure complete filling of the tank. The
electrical power may then be turned on. Verify proper
operation after servicing.
Note: Always reference the wiring diagram for the correct
electrical connections.
– 19 –
GAS CONTROL
SIDE VIEW
QUICK CONNECTS FOR
POWER SUPPLY AND IGNITER
LOCATED ON UNDERSIDE
OUTLET
PRESSURE
PORT
MANIFOLD PRESSURE
ADJUSTMENT (REMOVE
CAP FOR ACCESS)
3/4” NPT. WRAP
WITH TEFLON TAPE
(2 WRAPS MIN.)
GROUND
CONNECTION
GAS CONTROL
FRONT VIEW
GAS OUTLET
TO BURNER
GAS INLET
1/2” NPT
TEMPERATURE
ADJUSTMENT
BUTTONS
TEMPERATURE
INDICATORS
IGNITER AND FLAME
PROBE ASSEMBLY
COMBUSTION
BLOWER
AIR
PRESSURE
SWITCH
HIGH
LIMIT
SWITCH
TO POWER SUPPLY
DISCONNECT AND
OVERLOAD
PROTECTION
WHITE
BLACK
GREEN
INTELLI-VENT TM
CONTROL
BOTTOM VIEW
Figure 21 Gas Control/Thermostat Details and Wiring Diagram (White-Rodgers)
CONNECTOR
GREEN
MAXIMUM SUPPLY INLET PRESSURE
14.0 in. w.c. (3.5kPa) ALL GASES
THIS GAS CONTROL IS EQUIPPED WITH AN ECO (ENERGY CUT-OFF)
THE ECO WILL SHUT THE GAS OFF SHOULD THE OUTLET WATER
TEMPERATURE EXCEED 93° (200°F)
SUPPLY INLET
PRESSURE PORT
SUPPLY GAS
INLET 1/2” NPT
MANIFOLD CON-
NECTION UNDER
CONTROL
MANIFOLD PRESSURE
PORT UNDER CONTROL
LED INDICATOR
BURNER MANIFOLD
PRESSURE ADJUST-
MENT (REMOVE
DIAL FOR ACCESS
SAFETY
COVER
INCREASE
PRESSURE
DECREASE PRESSURE
GAS CONTROL VIEWED FROM GAS INLET
WITH TEMPERATURE DIAL REMOVED
Figure 20 Gas Valve/Temperature Control
BURNER MANIFOLD GAS PRESSURE
NATURAL GAS 3.5 in. w.c. (0.9kPa)
PROPANE GAS 10.0 in. w.c. (2.5kPa)
SUPPLY INLET GAS PRESSURE
NATURAL GAS 7.0 in. w.c. (1.7kPa)
PROPANE GAS 11.0 in. w.c. (2.7kPa)
GAS CONTROL SWITCH
GAS VALVE CONNECTOR
GAS VALVE
CONNECTOR
GND
QUICK CONNECTORS
MAIN AND IGNITER
PRESSURE SWITCH
AND INDUCER
GAS CONTROL/THERMOSTAT - VIEW OF ELECTRICAL
CONNECTIONS, WITH COVER REMOVED (WDER 2000N)