COMMISSIONING
75
It is necessary to have the electrical supply to the water heater switched on during stages of checking or
adjusting the preset outlet temperature setting procedure.
Warning:
The removal of the front panel will expose 240 volt wiring. Take care not to touch wiring
terminals. The adjustment must be carried out by a qualified person.
Warning:
This procedure will involve the adjustment of dip switches. Adjustment of a dip switch should
only be made with an insulated tool.
To check or adjust the preset outlet temperature setting:
1.
Switch off the electrical supply at the power outlet to the water heater.
2.
Remove the screws holding the front panel to the jacket.
3.
Gently disengage the front panel and pull forward to remove from the water heater.
4.
Switch on the electrical supply at the power outlet to the water heater.
5.
Switch DIP SWITCHES 3 and 4 to the on (up) position on the I.C. Board.
The red LED will commence a series of flashes, with
three (3) seconds between each series.
If the red LED is flashing the correct number of flashes for
the desired preset temperature, then proceed to step 7, as
no further adjustment is necessary (refer to
“Preset
Temperature Settings”
table on page 74).
874 series
If the water heater is to be used as a gas booster to a solar
water heater and there are three flashes of the red LED,
then proceed to step 7, as no further adjustment is
necessary.
6.
Press the MAX button to increase or the MIN button to
decrease the preset outlet temperature setting.
Each press of the MAX or MIN button will increase or
decrease the preset temperature by one increment.
The MAX and MIN buttons are located above the DIP
switches.
874 series
The increments are 50 C (1 flash), 55 C (2 flashes), 60 C
(3 flashes).
Set the temperature to 60°C (3 flashes) on an 874 series
water heater if it is installed as a gas booster to a solar
water heater.
876 series
The increments are 40 C (1 flash), 43 C (2 flashes), 48 C
(3 flashes).
7.
Switch DIP SWITCHES 3 and 4 to the off (down) position.
The red LED will go out. The preset outlet temperature
setting is now set.
8.
Switch off the electrical supply at the power outlet to the
water heater.
9.
Refit the front panel and screws to the water heater.
ON
OFF
(DOWN)
(UP)
ON
OFF
(DOWN)
(UP)
max
button
min
button
dip
switches
