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COMMISSIONING THE PCB
PCB commissioning steps are ONLY to be done if the PCB is being replaced or after
a gas conversion.
IMPORTANT
1.
Turn on the gas and power supply.
Press the 'Test' button, the display will now show the gas code ( A1 = Natural, L1 = Propane). Press the
2.
'Up' and 'Down' buttons to obtain the gas code for the unit, and press 'Set' to lock in the code.
Commissioning of the PCB is now complete and the gas pressures can now be checked.
ROOM THERMISTOR OFFSET
The PCB has an additional LED display sequence which will appear after the gas code. This is for
the setting of room thermistor offset. By default this is factory pre-set to 0 (0°C) and ONLY needs
adjustment if there is significant variation in the thermistor reading and the actual temperature of
IMPORTANT
the room. Adjustment of this setting is typically NOT required and is NOT part of commissioning.
Thermistor Offset Adjustment
When required adjustment of the offset can be made in 1/3°C steps to ±5°C. Pressing the 'Up' button offsets the
temperature +°C, pressing the 'Down' button offsets the temperature -°C. Refer below for the full adjustment range.
± Display Value
0
± Temp. Offset °C
0
1/3
GAS CONTROL SOLENOIDS
Gas control RHFE0800F/1000
1
2
3
1
Inlet pressure test point screw
2
Pilot pressure test point screw
Rinnai
1
2
3
4
2/3
1
1 1/3
1 2/3
4
5
6
7
8
2
2 1/3
2 2/3
Gas control RHFE1500 (additional solenoid)
1
2
3
3
Pilot pressure adjustment screw
4
Main burner pressure test point screw
23
COMMISSIONING
9
10
11
12
13
3
3 1/3
3 2/3
4
4 1/3
4
RHFE0800F_1000_1500 IM
14
15
4 2/3
5
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