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Operating instructions
27
4 Operating instructions
4.1 Initial filling instructions
Before proceeding with the operation of the heater
make sure that the system is filled with water:
B Turn off power supply to heater.
B Open the cold water inlet supply to the heater fully.
B Open a hot water faucet to permit the water to fill the
heater and the piping and to eliminate the air trapped
in the system.
B Close the hot water faucet after the water flows freely
and all the air has escaped from the system. Turn on
power supply to heater. The water heater is now
ready to operate.
Fig. 31
4 On/Off button
5 Reset button
6 Recirculation water temperature selector
7 LED - (ON) warning light (blinks during lock-out error)
8 Domestic hot water temperature selector
27 Digital display
4.2 For your safety read before
operating your water heater
WHAT TO DO IF YOU SMELL GAS
B Do not try to operate any appliance.
B Do not touch any electric switch; do not use any
phone in your building.
B Immediately call your gas supplier from a neighbors
phone. Follow the gas supplier’s instructions.
B If you cannot reach your gas supplier, call the fire
department.
B Use only your hand to press the on/off control switch.
Never use tools. Follow these instructions exactly. If
control switch is jammed, close the gas supply and
call a qualified service technician. Attempted forceful
repair may result in a fire or explosion.
B Do not use this appliance if any part has been under
water. Immediately call a qualified service technician
to inspect the appliance and to replace any part of
the control system and any gas control which has
been under water.
4.3 Startup instructions
B 1. STOP! Read the previous safety information.
B 2. The gas valve must be shut off by putting the ON/
OFF switch to position OFF. Wait five (5) minutes to
clear out any gas. If you smell gas, STOP! Follow the
safety information in Chapter 4.2 above. If you do not
smell gas, go to the next step.
B 3. This appliance is equipped with electronic ignition
for lighting the main burners. When turning the
heater on, follow these instructions exactly.
B 4. Press the ON/OFF switch to the ON position. In
this position, the water heater is ready to use.
B 5. Connect tank Aquastat to the TT (thermostat)
connection on the heater's printed circuit board.
(Fig. 6, page 8). Close circuit on Aquastat to activate
heater.
B 6. The burners will remain on until the heat demand
is met.
When the heater is in operation you may hear its
induced draft vent fan and burner operating. After a call
for heat is satisfied, the fan will continue to operate for
up to 5 seconds to exhaust all flue gases.
TO TURN OFF GAS TO APPLIANCE
B Turn off the manual gas shut off on the supply line to
the heater and set the ON/OFF switch to the OFF
position. Note: a manual gas shut off valve is not
supplied with the heater.
Warning: If you do not follow these
instructions exactly, a fire or explosion
may result causing property damage,
personal injury or loss of life.
i
NOTE: upon installation or after
gas line work has been done, air
in the gas line may cause a
lockout error. Reset the unit
(Fig.
31, pos. 5). The heater will
reattempt ignition.