6 720 608 032
Operation instructions
15
4.2 Lighting 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 “B” in chapter 4.1. If you do not smell gas, go
to the next step.
B 3. This water heater is equipped with a safety pilot
burner and an automatic ignition control system.
B 4. Set the ON/OFF switch (open cover plate on left
panel strip) to the position ON . In this position,
the water heater is ready to use.
Fig. 18
B 5. Open hot water tap to a flow rate above the
minimum activation rates listed in table 4. The
automatic ignition system first ignites the safety pilot
burner which then ignites the main burner in about 4
seconds.
B 6. The green LED indicator is on when the main
burner is on.
B 7. The pilot flame will extinguish 10-30 seconds after
the burners come on. The burners will remain on until
the hot water tap is turned off.
Note: The GWH 1600 H operates in two modes. See
SETTING THE WATER TEMPERATURE.
4.3 To turn off appliance
B Set the ON/OFF switch to the position OFF .
Fig. 19
B Shut installer supplied manual gas shutoff valve on
the supply line to the heater.
Note: On first time initial
installation, existence of air in the
gas supply line and in the water
line may cause some ignition
delay. In that case, repeat the
ignition process until all the air
has been purged.
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