Rheem GAS BOOSTED SOLAR WATER HEATER - Manual (Page 50)

COMMISSIONING
50
Maximum test point gas pressure
Refer to the rating label on the water heater for the maximum test point gas pressure.
Follow Steps 1 to 7 of the “Minimum test point gas pressure” procedure, but open the hot tap fully and
use the MAX button instead of the MIN button.
Note: In Step 2, “3H” or “4H” will be shown on the LED display, depending on the model of the water
heater.
After setting the minimum and maximum test point gas pressures:
• Close the hot tap.
• Remove the manometer and refit and tighten the test point screw.
• Open a hot tap again so the burners ignite.
• Test for gas leaks.
• Refit the front panel and screws to the water heater.
• Close the hot tap.
TO TURN OFF THE WATER HEATER
If it is necessary to turn off the water heater on completion of the installation, such as on a building site
or where the premises is vacant, then:
• Switch off the electrical supply at the power outlet to the water heater (refer to note below).
• Close the gas isolation valve at the inlet to the water heater.
• Close the cold water isolation valve at the inlet to the water heater.
• Drain the gas booster if there is a risk of freezing conditions occurring (refer to “Draining The Water
Heater” on page 51).
Note: The frost protection system of the gas booster will be rendered inoperable if electrical power is
not available at the water heater. Damage caused by freezing due to the unavailability of power at the
water heater is not covered by warranty (refer to
“Warranty Exclusions” on page 53). If the power has
been switched off to the water heater and there is a risk of freezing, then it is necessary to drain the gas
booster (refer to
“Draining the Water Heater” on page 51).