1- FILLING THE INNER TANK
(Domestic Water)
CAUTION
Never use water heater unless it is complete-
ly filled with water.
CAUTION
Always fill the inner tank before filling the
outer tank to prevent any damage to the
inner tank.
1. Close domestic water drain valve and pri-
mary (outer) tank isolation valves located
in front of water heater.
2. Open domestic water isolation valves for
water heater.
3. Vent air from inner (domestic water) tank
by opening nearest hot water faucet. Fill
domestic water tank completely by allow-
ing water to run until there is a constant
flow of water.
4. Close hot water faucet
2- FILLING THE OUTER TANK - (Fig.: 15)
(Primary Water)
1. Close drain valve located on the bottom
rear of water heater.
2. Open water heater's system isolation
valves. Located in front of water heater
3. Allow air to escape from outer (system
water) tank by opening cap on automatic
air vent, located on top of water heater.
4. Fill to correct system pressure. Correct
pressure will vary with each application.
Normal cold water fill pressure is 12 psig.
NOTICE
For proper water heater operation, always
leave vent cap unscrewed one full turn.
5. When tank is full, air will stop escaping,
and vent will close. If air vent does not
seat properly (i.e., water leaks out),
remove cap A. Briefly push in valve B and
release it to clean valve seat. Screw cap A
on completely, then unscrew one turn.
A
B
6. If antifreeze is used in primary water,
ensure concentration never exceeds a
50/50 ratio. System water (including addi-
tives) must be practically non-toxic, hav-
ing a toxicity rating or class of 1, as listed
in Clinical Toxicology of Commercial
Products. Inhibited propylene glycol is
recommended. Follow antifreeze manu-
facturer's instructions.
WARNING
Do not use automotive or ethylene glycol
antifreeze, or any undiluted antifreeze. This
can cause severe personal injury, death or sub-
stantial property damage if ignored.
3- BURNER OPERATION
1. Check to see if the HM water heater is filled
with water (10-12 psi on Pressure &
Temperature gauge on console).
2. Set the thermostat on console to call for hot
water.
3. Turn ON-OFF switch on the console ON.
4. Refer to burner manufacturer's installation
manual "Starting the Burner". Refer to
attached specification sheet when adjusting
the burner to rated input.
24
Water Heater Start-Up
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