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GENERAL
Refer to the Features and Components section of this manual
(pages 9 & 10) for the location of components mentioned in the
instructions that follow.
NEVER operate the heating elements without being certain
the water heater is filled with water, and a temperature and
pressure relief valve is installed in the relief valve opening on
top of the heater.
An electric type low water cutoff is provided on all heaters as
standard equipment. The water probe is installed near the top
of the tank to monitor the presence of water. The control circuit
is opened if the water level is below this point.
The pilot switch (power on/off toggle switch) on the cabinet front
permits the heater to be turned on and off without having to
operate the electrical disconnect switch.
Full power is present whenever the
cabinet door is opened even with
the pilot switch turned off.
Optional manual override switches on the cabinet front allow
elements to be manually de-energized if full capacity is not needed.
FILLING THE WATER HEATER
CAUTION
Property Damage Hazard
In order to avoid water heater damage, fill tank with
water before operating.
To fill the water heater with water:
1. Turn off the electrical disconnect switch.
2. Turn off pilot toggle switch.
3. Close the heater drain valve.
4. Open a nearby hot water faucet to allow the air in the system to escape.
5. Fully open the cold water inlet valve, filling the heater and piping.
6. Close the hot water faucet when water starts to flow from the
faucet. Leave the cold water inlet valve fully open. The heater
is now ready for start up and temperature regulation.
OPERATION
WIRING DIAGRAMS
DANGER
7. Close the cabinet door and perform start up checks listed below
before turning on the electricity.
INITIAL START UP
The following checks should be made by the installer when the
water heater is placed into operation for the first time:
1. Check all factory and field made water and electrical connections
for tightness. Also check connections on top of the heater. Repair
water leaks and tighten electrical connections as necessary.
2. Turn on the electrical disconnect switch and pilot toggle switch.
The pilot toggle switch is located on cabinet.
3. Observe the operation of the electrical components during
the first heating cycle. USE CARE AS THE ELECTRICAL
CIRCUITS ARE ENERGIZED.
Temperature control and contactor operation should be checked
by allowing heater to come up to temperature and shut off
automatically. USE CARE AS THE ELECTRICAL CIRCUITS
ARE ENERGIZED.
DRAINING THE WATER HEATER
The water heater must be drained if it is to be shut down and/
or exposed to freezing temperatures. Maintenance and service
procedures may also require draining the heater.
1. Turn off the electrical disconnect switch.
2. Turn off pilot toggle switch.
3. Close the cold water inlet valve to heater.
4. Open a nearby hot water faucet to vent the system.
5. Open drain valve.
6. If the heater is being drained for an extended shutdown, it is
suggested the drain valve be left open during this period.
Follow FILLING instructions when restoring hot water service, see
the list above.
DANGER
18
•
Burn hazard.
•
Hot water discharge.
•
Keep clear of drain valve
discharge outlet.
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