Toshiba HWS-P805XWHM3-E(TR) Service Manual page 190

No. Exchange parts name
17 Water heat
exchanger assembly
Work procedure
• Close the water piping source valve and the valve
of water pipe connected to the hydro unit, and
then remove the refrigerant and water piping.
• Perform refrigerant recovery with the outdoor
unit.
• Disconnect all the power source cable, outdoor
unit connection cable, and cylinder connection
cable.
1. How to remove
1) Perform the step 1-1, step 5, 6, and 8.
2) Remove the water pipe fixing board.
(ST2T Ø4 × 8, 2 screws)
3) Remove the refrigerant piping fixing board.
(ST2T Ø4 × 8, 3 screws)
4) Remove the nut of the heater connection.
5) Remove the fixed screws of the electrical control
box fixing board.
(ST2T Ø4 × 8, 4 screws)
6) Remove the side reinforcing board (left).
(ST2T Ø4 × 8, 6 screws) 3 for inside, 3 for outside
7) Remove the water heat exchanger fixing band.
(ST2T Ø4 × 8, 6 screws)
8) Remove the water heat exchanger assembly.
The heater connection uses a packing for water
seal. Be careful not to scratch the packing;
otherwise, water leakage may occur.
2. How to attach
1) Attach a new water heat exchanger assembly in the
reverse order of the removal.
2) Restore all piping and wiring as in the original state,
and check that there is no water or refrigerant
leakage.
• After the water heat exchanger assembly
replacement repair, open the water supply source
valve and water piping source valve to pass
water through the hydro unit, and check that the
connection has no water leakage.
• After connecting the refrigerant pipe, check that
the connection has no refrigerant leakage.
The piping structure
slightly differs in
11 kW and 8 kW
specifications.
189
Remarks
Water Water Water
piping fixing piping fixing piping fixing
Refrigerant Refrigerant Refrigerant
piping fixing piping fixing piping fixing
board board board
Nut Nut Nut
Electrical
control
box fixing
Side Side Side
reinforcing reinforcing reinforcing
board (left) board (left) board (left)
Water heat exchanger
fixing band
Water heat exchanger assembly