Toshiba MMW-AP0481CHQ-E Service Manual page 105

No. Part to be replaced
11 Heat exchanger
assembly
(Water - Refrigerant)
TC2 (TWO) Temp. sensor
Heat exchanger
fixing plate
Fixing plate for
water pipe
Nut
TA (TWI) Temp. sensor
Work procedure
1. Detachment
1) Carry out the detachment of item 1 and 2 .
2) Recover R134a gas from check joint.
3) Remove the pipe connected to connection port for
refrigerant pipe.
4) Remove the parts (following parts) around the
heat exchanger assembly
(water - refrigerant).
• Side cabinet (Right)
• Electric parts box assembly
• Reactor cover
• Reactor
• Reactor base
• Sub-base
• Electric parts box base
• Electric parts box fixing plate
• Support plate (Side-Front)
• Fixing plate for water pipe
• Fixing band for water pipe
5) Remove the PMV assembly connected to the heat
exchanger assembly (water - refrigerant) by the
burner. (It works, while cooling down a PMV body.)
6) Remove the discharge pipe connected to the heat
exchanger assembly (water - refrigerant) by burner.
7) Remove the TA (TWI) or TC2 (TWO) temperature
sensors.
8) Cut the binding band fixing the liquid side pipe.
9) Remove the nuts and remove the heat exchanger
assembly (water - refrigerant) from heat exchange
plate and replace it.
NOTE:
• Protect the peripheral parts so that flame won't
touch them directly.
• Be sure to remove collar from the removed heat
exchanger and attach to a new heat exchanger.
2. Attachment
1) Carry out installation by following the detachment
procedure in reverse.
2) Attach the pipe cover removed and the heat
insulation.
Fixing band for Water pipe
Liquid side pipe
Fixing band for
water pipe
Cut the binding band
Heat exchanger
Collar
– 105 –
Remarks
Check joint
(Low pressure side)
(High pressure side)
Side cabinet (Right)
Electric parts box
assembly
Reactor cover
Reactor
Reactor base
Connection port for water pipe
Electric parts box fixing plate
Support (Side/Front)
Electric parts box base
Sub-base
Heat exchanger assembly
(Water - Refrigerant)
Discharge pipe
Remove it by burner
Remove it by burner
PMV assembly
Wrap the heat insulation
Attach the
around pipe
pipe cover
Check joint