6 720 608 124
Operation instructions
15
4.2 Lighting instructions
BSTOP! Read the previous safety information.
BThe gas valve must be turned off by sliding the gas
valve button to all the way to the left.
Fig. 17
BWait five (5) minutes to clear out any gas. If you smell
gas, STOP! Follow “B” in the safety information
above on this plate. If you don’t smell gas, go to next
step.
BThe pilot burner window is located in the front center
of the cover.
BSlide the gas valve button to the position .
Fig. 18
BFully depress gas valve button.
Fig. 19
BWith the gas valve button fully depressed, light pilot
by pushing the piezo button. This step may have to
be repeated.
Fig. 20
BObserve the pil ot flame through the peephole. The
gas valve button should be held down for at least 15
seconds with pilot burning before releasing. When
the gas valve butto n is released, the pilot should
continue to burn.
- If the gas valve button does not pop out when
released, stop and immediately call your service
technician or gas supplier.
- If pilot does not stay lit, repeat all steps.
- If pilot will not stay lit after several tries, slide the gas
valve button all the way to the left and call service
technician or gas supplier.
BThe heater will now fire at minimum power when
water is drawn at a rate greater than the required
activation flow rate.
Note: If main burner should fail to ignite, make sure pilot
is burning. If not, repeat lighting steps.
Note: The GWH 1000 P operates in two modes. See
SETTING THE WATER TEMPERATURE.
4.3 To turn off appliance
BSlide the gas valve button all the way to the left and
turn off the installer supplied manual gas shutof f on
the supply line to the heater.
Fig. 21
4.4 Setting the water temperature
The GWH 1000 P has a gas control that modulates
burner input in response to flow. Its purpose is to