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Cabinet
No. Part to be replaced
Work procedure
Remarks
1. Detachment
1) Carry out the detachment of item
7
(Heat exchanger
assembly).
2) Remove the screws for the cabinet and then remove
the attachment plate, as shown below.(4x10, 4pcs.)
8
3) Remove the screws for the cabinet, tilt the cabinet and
then lift the cabinet upward, as shown below.(4x10, 4pcs.)
2. Attachment
1) Carry out installation by following the detachment
procedure in reverse.
Right side
Left side
Attachment plate
Right side
Left side
Heat exchanger
assembly
(Continued)
7
CAUTION
After the vacuuming is completed, carry out the following procedure before adding refrigerant.
• Plate heat exchanger may explode because the water in the plate heat exchanger frozen.
To avoid this phenomenon, add refrigerant before carrying out a water supply to the water pipe
system of the Hot water module.
• After connecting the refrigerant pipes, check that the connection has no leakage, and then carry out
vacuuming.
• Control the tightening torque for the liquid side from 33 to 42 N•m, and the gas side is from 63 to 77
N•m.
• After the heat exchanger assembly is replaced, open the water supply source valve and water piping
valve to pass water through the unit, and check that the flow switch connection has no water leakage.
• Carry out the work of air ventilation in water circuit.
Drain pan
1. Detachment
1) Remove the drain pipe.
2) Carry out the detachment of item
8
(Cabinet).
3) Remove the screws for the drain pan.(4x10, 4pcs.)
CAUTION
• Be careful of using the different screw, as shown below.
9
2. Attachment
1) Carry out installation by following the detachment
procedure in reverse.
The screws fixing the drain pan are with
serration. These screws are different from
other one.
