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COMMISSIONING
78
TO CHECK OR ADJUST THE PRESET OUTLET TEMPERATURE SETTING
The temperature setting will be displayed by a series of flashes from the red LED, with a three (3) second
pause between each series of flashes. The preset outlet temperature settings and series of flashes are:
874 series 55°C (1 flash), 60°C (2 flashes), 70°C (3 flashes)
876 series 43°C (1 flash), 45°C (2 flashes), 48°C (3 flashes)
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. Close the cold water isolation valve at the inlet to the water heater.
5. Switch on the electrical supply at the power outlet to the water heater.
Note: Wait five (5) seconds for the electronic system to initialise.
6. 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 8, as no
further adjustment is necessary.
7. 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 55°C (1 flash), 60°C (2 flashes), 70°C
(3 flashes).
876 series
The increments are 43°C (1 flash), 45°C (2 flashes), 48°C
(3 flashes).
8. Switch DIP SWITCHES 3 and 4 to the off (down) position.
The red LED will go out.
Note: Wait five (5) seconds for the setting to be saved. The
preset outlet temperature setting is now set.
9. Switch off the electrical supply at the power outlet to the water
heater.
10. Refit the front panel and screws to the water heater.
11. Open the cold water isolation valve fully at the inlet to the water
heater.
12. Switch on the electrical supply at the power outlet to the water heater.
max
button
min
button
dip
switches
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