26
TESTING
1. Purge gas, hot water and cold water supply lines before making the final connection
of the water heater. Swarf in either the gas or water supplies may cause damage.
2. Turn on gas and cold water supplies.
3. Test for water leaks and gas escapes near the unit.
4. Isolate gas and electric supply. Remove test point screw located on the inlet gas
valve connection inside the heater and attach pressure gauge.
5. Turn the power on at the switch and turn on gas.
Warning:
There are 230V AC live
supplies inside the heater.
6. If remote controllers are fitted, turn the controller on, select the maximum delivery
temperature and open ALL available hot water outlets. If remote controllers are not
fitted, simply open all available hot water outlets. (CAUTION: Ensure building
occupants do not have access to hot water outlets during this procedure).
7. The gas pressure check must be carried out with all other appliances on the same
main operating at maximum capacity to ensure that there is sufficient gas pressure.
8. With all other appliances operating the pressure at the test point on the inlet to the
gas valve should read
20 mbar
for Natural Gas. For LPG (Propane) the pressure
should be
37 mbar
. If the pressure is lower, the gas supply is inadequate and the
water heater will not operate to specification. Check gas meter, regulator and
pipework for correct operation/sizing and rectify as required. Note that the gas
regulator on the appliance is electronically controlled and factory pre-set. Under
normal circumstances it does not need adjustment during installation.
9. Close hot water outlets.
10.Inspect and clean the strainer and the filter located on the cold water inlet pipe. This
procedure may need to be repeated to ensure the strainer remains clear.
11.If temperature controllers are fitted, it is necessary to test their operation through the
complete range of functions.
12.Confirm the hot water delivery temperature using a thermometer. If controllers are
fitted, compare the measured value to the set point.
13.After testing is completed, explain to the user the functions and operation of the
water heater and temperature controllers.
CAUTION
RISK OF ELECTRIC SHOCK
