PRESSURE RELIEF VALVE
THIS VALVE IS A SAFETY COMPONENT AND MUST
NOT BE REMOVED FOR ANY REASON OTHER
THAN REPLACEMENT.
This water heater is equipped
with a pressure relief valve that complies with the standard
for Relief Valves and Automatic Gas Shutoff Devices for
Hot Water Systems, ANSI Z21.22 / CSA 4.4.
This valve protects against excessive water expansion only.
This water heater has separate and dedicated protection for
excessive heat.
If you use a discharge line, do not use a reducing coupling or
other restriction smaller than the outlet of the relief valve.
Allow complete drainage of both valve and line.
FOR REPLACEMENT PARTS:
•
DO NOT install anything less than a pressure relief
valve certified by a nationally recognized testing
laboratory that maintains periodic inspection of
product of listed equipment or materials, as meeting
requirements for Relief Valves and Automatic Gas
Shutoff Devices of Hot Water Supply Systems,
ANSI Z21.22 / CSA 4.4. Valve must have
maximum set pressure
not to exceed 100 psi.
•
Install replacement valve into opening provided and
designated for this purpose on water heater.
•
Installation must conform with local codes or in the
absence of local codes, Standard on Recreational
Vehicles, ANSI A119.2 or CAN/CSA-Z240RV.
CAUTION ELECTRICAL DAMAGE
Label all wires prior to disconnection when servicing controls.
Wiring errors can cause improper and dangerous operation.
Verify proper operation after servicing.
3
WIRING INSTRUCTIONS
Heater must be connected to fully rectified
12 VDC current, taking care to assure
RED
lead is connected to +12 VDC (positive)
supply and
green wire connected to -12VDC
(negative)
connections. Reversing polarity
or connecting to AC power will damage the
equipment which is not covered by
warranty.
The appliance, when installed, must be
electrically grounded in accordance with
local codes or, in the absence of local
codes, with the
National Electrical Code,
ANSI/NFPA 70
and/or the
CSA C22.1,
Canadian Electrical Code.
The appliance must be disconnected from the gas
supply piping system during any pressure testing of the
system at test pressures in excess of
½
psi. The
appliance must be isolated from the gas piping system
during any pressure testing at test pressures equal to or
less than
½
psi. Pressure inlet to valve, 13” W.C.
maximum, 11” W.C. minimum. Pressure at outlet of
valve is factory set at 10”. Burner manifold pressure is
W.C. 8.9” W.C. +/- .2” at tap on burner manifold.
550-NSP EC SCHEMATIC
Flow Meter
Fuse
GND
Green
Black
Red
Green
Red
Brown
Brown
