Mitsubishi Electric PUMY-P36NKMU4 Technical & Service Manual page 3

The refrigerant oil applied to flare and flange
connections must be ester oil, ether oil or
alkylbenzene oil in a small amount.
If large amount of mineral oil enters, that can cause
deterioration of refrigerant oil, etc.
Charge refrigerant from liquid phase of gas
cylinder.
If the refrigerant is charged from gas phase, composition
change may occur in refrigerant and the efficiency will be
lowered.
Do not use refrigerant other than R410A.
If other refrigerant (R22, etc.) is used, chlorine in refrige-
rant can cause deterioration of refrigerant oil, etc.
[1] Cautions for service
(1) Perform service after recovering the refrigerant left in unit completely.
(2) Do not release refrigerant in the air.
(3) After completing service, charge the cycle with specified amount of refrigerant.
(4) If moisture or foreign matter might have entered the refrigerant piping during service, ensure to remove them.
[2] Additional refrigerant charge
When charging directly from cylinder
(1) Check that cylinder for R410A on the market is a syphon type.
(2) Charging should be performed with the cylinder of syphon stood vertically. (Refrigerant is charged from liquid phase.)
Electronic weighing scale
[3] Service tools
Use the below service tools as exclusive tools for R410A refrigerant.
No. Tool name
1 Gauge manifold
2 Charge hose
3 Electronic weighing scale
4 Gas leak detector
5 Adaptor for reverse flow check
6 Refrigerant charge base
Refrigerant cylinder
7
8 Refrigerant recovery equipment
OCH811A
Use the specified refrigerant only.
Never use any refrigerant other than that specified.
Doing so may cause a burst, an explosion, or fire when
the unit is being used, serviced, or disposed of.
Correct refrigerant is specified in the manuals and on the
spec labels provided with our products.
We will not be held responsible for mechanical failure,
system malfunction, unit breakdown or accidents caused
by failure to follow the instructions.
Do not pump down the system when a gas leak
has been detected.
The intake of air or other gases causes abnormally high
pressure in the refrigeration cycle, which may cause
explosion or injury.
· Only for R410A
· Use the existing fitting specifications . (UNF1/2)
· Use high-tension side pressure of 768.7 PSIG [5.3 MPa.G] or over.
· Only for R410A
· Use pressure performance of 738.2 PSIG [5.09 MPa.G] or over.
· Use the detector for R134a, R407C or R410A.
· Attach on vacuum pump.
· Only for R410A · Top of cylinder (Pink)
· Cylinder with syphon
3
Unit
Specifications
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