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5.2. Connecting to the PQFY unit
5.2.1. Five Wire Adapter
[Fig 5.1 [C] and 5.2]
Attach the 5 wires on the adapter to ACH1 (CN52) starting with black to terminal 13, followed by red (14), white (15), yellow (16) and green (17). Insert plug
end to CN52 on the PQFY water heating unit PCB. Please note power to the ACH1 box is provided through the 5 wire adapter.
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover . Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension may break, or overheat and burn
.
•
After wiring is complete, make sure again that there is no slack on the connections, and attach the cover onto the control box in the reverse order
removal.
5.2.1. TH1H
[Fig. 5.2 [E] & 5.3]
Attach 2 core Non-polarised 1.25mm shielded wire to both terminals 21 and 22, and then feed back to PQFY TH1H terminals ‘inlet air’ on PCB (see PQFY
manual).
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover . Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension may break, or overheat and burn
.
•
After wiring is complete, make sure again that there is no slack on the connections, and attach the cover onto the control box in the reverse order
removal.
5.3. Connecting the Immersion Signal
If immersion heating is required (check set up [Section 5.1.2]), then a connection has to be made between the ACH1 unit and the immersion
heater. When water has reached 44°C, the IH drive will become energised, and send a signal to the immersion heater to start.
Attach 2 core 1.25mm shielded wire to both terminals 18 and 19 on the ACH1 [Fig 5.1 [D]] and then to immersion heater, noting polarity.
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover . Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension may break, or overheat and burn
.
•
After wiring is complete, make sure again that there is no slack on the connections, and attach the cover onto the control box in the reverse order
removal.
5.4. Connecting the Mode Select
Attach 2 core 1.25mm shielded wire on the following terminal blocks on ACH1 [Fig 5.1 [B]].
o
For DHW select, connect wires between terminals 7 and 8.
o
For UFH select, connect wires between terminals 9 and 10.
o
For UFC select, connect wires between terminals 11 and 12.
When a volt free connection is made, the mode will become selected and the unit will operate accordingly.
Note:
Ensure that the wiring is not pinched when fitting the terminal box cover . Pinching the wiring may cut it.
Caution:
Install wiring so that it is not tight and under tension. Wiring under tension may break, or overheat and burn
.
•
After wiring is complete, make sure again that there is no slack on the connections, and attach the cover onto the control box in the reverse order
removal.
Notes:
•
Check that the bunch of wir es do not com e off even if they are pulled strongly.
