Pmfy-P32Vbm-Er3; Pmfy-P40Vbm-Er3; Technical Changes; Safety Precaution - Mitsubishi Electric PMFY-P20VBM-E1 Technical & Service Manual

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TECHNICAL CHANGES

PMFY-P20VBM-E#2
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2
PMFY-P40VBM-E#2
1. DRAIN PIPE has been changed.
2. JOINT SOCKET (FOR DRAIN PIPE) has been added.
PMFY-P20VBM-E
1
PMFY-P25VBM-E
1
PMFY-P32VBM-E
1
PMFY-P40VBM-E
1
1. CONTROLLER BOARD (I.B) has been changed.
2. PANEL has been changed.
PMP-40BM
(White : 0.98Y 8.99/0.63)
3. FAN MOTOR (MF) has been changed.
4. THERMISTOR (TH22, TH23) have been changed.
PMFY-P20VBM-E
PMFY-P25VBM-E
PMFY-P32VBM-E
PMFY-P40VBM-E
1. FAN MOTOR (MF) has been changed.
2. CONTROLLER BOARD (I.B) has been changed.
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SAFETY PRECAUTION

CAUTIONS RELATED TO NEW REFRIGERANT
Cautions for units utilizing refrigerant R407C
Use new refrigerant pipes.
In case of using the existing pipes for R22, be careful with
the followings.
· Change flare nut to the one provided with this product.
Use a newly flared pipe.
· Avoid using thin pipes.
Make sure that the inside and outside of refrige-
rant piping is clean and it has no contamination
such as sulfur hazardous for use, oxides, dirt,
shaving particles, etc.
In addition, use pipes with specified thickness.
Contamination inside refrigerant piping can cause deterio-
ration of refrigerant oil etc.
Store the piping to be used indoors during
installation, and both ends sealed until just
before brazing.
(Store elbows and other joints in a plastic bag.)
If dust, dirt, or water enters the refrigerant cycle,
deterioration of the oil and compressor trouble may result.
PMFY-P20VBM-ER3
PMFY-P25VBM-ER3

PMFY-P32VBM-ER3

PMFY-P40VBM-ER3

PMFY-P20VBM-E#2
PMFY-P25VBM-E#2
PMFY-P32VBM-E#2
PMFY-P40VBM-E#2
→ PMP-40BMW
(Pure white : 6.4Y 8.9/0.4)
PMFY-P20VBM-E
1
PMFY-P25VBM-E
1
PMFY-P32VBM-E
1
PMFY-P40VBM-E
1
Use ESTR , ETHER or HAB as the lubricant to
coat flares and flange connection parts.
If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil etc.
Use liquid refrigerant to seal the system.
If gas refrigerant is used to seal the system, the composition
of the refrigerant in the cylinder will change and performance
may drop.
Do not use a refrigerant other than R407C.
If another refrigerant (R22, etc.) is used, the chlorine in the
refrigerant may cause the lubricant deterioration.
Use a vacuum pump with a reverse flow check valve.
The vacuum pump oil may flow back into the refrigerant
cycle and cause the lubricant deterioration.
Ventilate the room if refrigerant leaks during
operation. If refrigerant comes into contact with
a flame, poisonous gases will be released.
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