COOLING CYCLE HEAVY REPAIR
* Pipe Connection
Connect a red hose to the high pressure side and a blue hose
to the low pressure side.
* Vacuum Sequence
Open 1,2 valves and evacuate for 40 minutes.
Close valve 1.
3.Vacuum degassing
Precautions
Items
* Charging sequence
1) Check the amount of refrigerant supplied to each model after
completing vacuum degassing.
2) Evacuate bombe with a vacuum pump.
3) Measure the amount of refrigerant charged.
- Measure the weight of an evacuated bombe with an electronic scale.
- Charge refrigerant into a bombe and measure the weight. Calculate
the weight of refrigerant charged into the bombe by subtracting the
weight of an evacuated bombe.
4.Refrigerant charging
Compresso
Evaporato
Drye
Condense
Vaccu
m
Hot
Blu
Yello
Re
High
Pressur
Low
Pressur
①
②
KEYPOINTING
1) If power is applied during vacuum degassing, vacuum degassing
shall be more effective.
2) Operate compressor while charging refrigerant. (It is easier and
more certain to do like this.)
the amount of refrigerant charged
= a weight after charging
- a weight before charging
(a weight of an evacuated cylinder)
Calculation of amount of refrigerant
h
d
- KEYPOINTING
1) Be sure to charge
the refrigerant at
around 25C.
2) Be sure to keep
-5g in the winter
and +5g in summer.
Indicate the weight
of
52
Summary of Contents for FRU-541 Series
Page 1: ...Mar 2010 S M No FRSU20IA05...
Page 4: ...2 External Size SPECIFICATIONS 3...
Page 30: ...1 Inner Basic Model 2 Basic Model 3 Dispenser Model WIRING DIAGRAM Refrigerant R 134a Type 29...
Page 31: ...1 Inner Basic Model 2 Basic Model 3 Dispenser Model WIRING DIAGRAM Refrigerant R 600a Type 30...
Page 32: ...1 Inner Basic Model 2 Basic Model 3 Dispenser Model WIRING DIAGRAM for Inverter Compress 31...
Page 55: ...COOLING CYCLE HEAVY REPAIR Brzing Reference Drawings 54...
Page 56: ...Water System for Dispenser Model 55...
Page 57: ...How to install water line Dispenser models only 56...
Page 58: ...How to install water line Dispenser models only 57...
