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INSTALLATION
NOTE: DO NOT INSTALL THE WATER HEATER ON ITS SIDE OR UPSIDE DOWN
1. Locate water heater at engine level as close to engine as possible.
2. Secure mounting brackets to structure with eight #12 minimum screws or 1/4 - 20
minimum cap screws and nuts.
3. Connect cold water supply and hot water outlet to heater as marked, 1/2" N.P.T.
ttings.
4. Connect heat exchanger system described in Figure 1. Make sure coolant system is
completely purged of air and full of coolant before operating.
5. Pressure temperature relief valve is factory installed. The pressure relief shall limit the
pressure to 127.5 PSI (879.3 KPA) minimum, 150 PSI (1034.2 KPA) maximum.
The valve must be oriented, provided with tubing, or otherwise installed so that
discharge can exit no more than 6 inches above, or at any distance below the structural
oor, and cannot contact any live electrical part.
Install replacement temperature and pressure protective equipment required by local
codes, but not less than a combination temperature and pressure relief valve certied
as meeting the requirements for relief valves and automatic gas shutoff devices for
hot water supply systems, ANSI Z21.22 by a nationally recognized testing laboratory
that maintains periodic inspection of production of listed equipment or materials.
6. Connect the electrical supply by a qualied electrician. The electrical supply shall be
permanent wiring, armored cable or conduit, per national electrical code NFPA 70,
with a minimum capacity of 1500 watts.
On 120 volt circuits, use a UL approved 15 amp circuit breaker. On 240 volt circuits,
use a 10 amp approved circuit breaker per leg.
7. GROUNDING INSTRUCTIONS: The supply ground shall be connected to the green
wire located in the water heater wiring compartment. Do not place switch in the
grounding circuit.
8. RESET INSTRUCTIONS: The heater is equipped with a high limit switch which can
be manually reset. If the limit switch activates, proceed as follows:
• Turn power off at main power panel or remote switch
• Remove wiring access cover
• Depress red button on high temperature limit switch
• Replace cover and turn power on
• If temperature limit switch reactivates, contact a Whale-Seaward
Authorized service center.
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