Mitsubishi Electronics PEH-5MYA, PE-8MYC Airtight test, Evacuation, Additional refrigerant charge

The outdoor unit of PE-5,8,10 have side blow type and upper blow type.

Factory charge refer to the table below.

Airtight test

Airtight test should be made by pressurizing nitrogen gas to 3Mpa. For the test method, refer to the following figure.

(Make a test with the valve closed. Be also sure to pressurize both liquid and gas pipe.) The test result can be judged good if the pressure has not been reduced after leaving for about one day after completion of nitrogen pressurization.

a.	Nitrogen gas
b.	To indoor unit
c.	System analyzer
d.	Low knob
e.	High knob
f.	Valve
g.	Liquid gas
h.	Gas pipe
i.	Outdoor unit
j.	Service port

			f
		b	g
			i
		c	h
a	d	e	j

Evacuation

Evacuation should be made from the service port provided on the outdoor unit’s valve to the vacuum pump commonly used for both liquid pipe and gas pipe.

(Make evacuation from both liquid pipe and gas pipe with valve closed.) Remember :Never carry out air purge by refrigerant.

a.	System analyzer
b.	To indoor unit
c.	Low knob
d.	High knob
e.	Valve
f.	Liquid gas
g.	Gas pipe
h.	Outdoor unit
i.	Service port
j.	Vacuum pump

e

bf

h

a g

cd

i j

Additional refrigerant charge

The mount of refrigerant charged in this unit is a appropriate for 5-meter long refrigerant pipes. Refer to the table below and add the corresponding amount of refrigerant if the pipes are extended.

(The refrigerant is charged in the outdoor unit.)

														Factory charge
				Refrigerant piping length
														Outdoor unit
	unit	5m	10m	15m	20m	25m	30m	35m	40m	45m	50m
	PU-7												Side blow		Upper blow
	PU-8	0	0.8	1.6	2.4	3.2	4.0	4.8	5.6	6.4	7.2				PU-7	5.7
charge	PU-10														PU-8	5.0
	PU-15														PU-10	8.7
mount		0	2x0.8	2x1.6	2x2.4	2x3.2	2x4.0	2x4.8	2x5.6	2x6.4	2x7.2
	PU-20											charge			PU-15	2x4.8
R-22
(kg)	PUH-5	0	0.5	1.0	1.5	2.0	2.5	3.0	3.5	4.0	4.5	mount			PU-20	2x9.7
	PUH-7	0	0.8	1.6	2.4	3.2	4.0	4.8	5.6	6.4	7.2	R-22	PUH-5	5.0
												(kg)
	PUH-8	0	0.8	1.7	2.5	3.3	4.2	5.0	5.8	6.7	7.5				PUH-7	5.7
	PUH-10												PUH-8	6.6	PUH-8	6.6
	PUH-15	0	2x0.8	2x1.7	2x2.5	2x3.3	2x4.2	2x5.0	2x5.8	2x6.7	2x7.5		PUH-10	9.9	PUH-10	9.9
	PUH-20														PUH-15	2x6.6
															PUH-20	2x9.7

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