22 | Operation instructions
To turn off appliance
▶ Slide the gas valve button all the way to the left and turn off
the installer supplied manual gas shutoff on the supply line
to the heater.
Setting the water temperature
The 330 PN has a gas control that modulates burner input in
response to flow. Its purpose is to ensure that the hot water
temperature will remain steady, although the water flow
demand might vary. The output temperature can be adjusted
with either the temperature adjustment knob or the gas control
Temperature adjustment knob
The temperature adjustment knob on the front bottom of the
heater (see Fig. 21) adjusts temperature by adjusting flow
capacity. See table 12 for details.
6 720 644 951 (2014/11)
Max flow rate
Table 12 Temperature rise (slide control to the right)
As the temperature adjustment knob is turned counter-
clockwise, the output temperature will lower and the activation
rate will be raised. Turning the knob clockwise will raise the
temperature and lower the activation rate.
Gas control slide button
The gas control slide button adjusts temperature by adjusting
how much gas is allowed to flow to the burners.
As the slide is adjusted to the left, the output temperature will
lower, with the lowest setting being the small flame position.
The hottest position is the highest flame position all the way to