Haier HDU-42H03/H Installation Manual For Outdoor Unit, 6Additional charge of refrigerant

INSTALLATION MANUAL FOR OUTDOOR UNIT

(6)Additional charge of refrigerant

Outdoor unit is precharged at a factory for the piping length up to 5m. Additional charge is not required up to 5m.

	Item	Basic	Factory charge amount		Additional	Length that	Maximum
		refrigerant	of refrigerant		charge	additional
							piping
Model		charge			amount (ii)	charge is not	length
			Outdoor unit	Indoor unit
		amount (i)			per meter	required
Heat	HDU-42H03/H	3.44	3.52	0	0.06	5m (viii)(v)	50m
pump	HDU-24H03/H	2.32	2.40	0	0.06	5m (viii)(vii)	30m
	HDU-28H03/H

Notes (i) Basic refrigerant charge amount means refrigerant amount when refrigerant piping length is 5m.

(ii)When the refrigerant piping length exceeds the length that additional refrigerant charge is not required, charge additional refrigerant based on to the calculated amount of refrigerant per unit piping length.

Example of additional charge amount calculation

Calculate the additional charge amount when the piping length is 25 m. (25 - 5 ) x 0.06 = 1.2

Additional charge amount (kg)

Additional charge amount per 1m (kg/m)

Length that additional refrigerant charge is not required (m)

Total length of the piping (one way) (m)

Additional charge amount of refrigerant =0.70kg(Calculate the amount in any case.)

If air perge with the refrigerant is forbidden at the local, please use the vacuum method (Please see the below figure)

To use vacuum pump

1

Detach the service port's cap of 3-way valve, the valve rod's cap for 2-way valve and 3-way's, connect the service port into the projection of charge hose (low) for gaugemanifold. Then connect the projection of charge hose (center) for gaugemanifold into vacuum pump.

2

Open the handle at low in gaugemanifold, operate

vacuum pump. If the scale-moves of gause (low) 2 Open reach vacuum condition in a moment, check 1 again.

2-way valve 3-way valve

Gaugemanifold

Vacuum pump

2-way valve 3-way valve

Gaugemanifold

Vacuum pump

3

Vacuumize for over 15min. And check the level gauge which should read -0.1 MPa (-76 cm Hg) at low pressure side. After the completion of vacuumizing,

close the handle 'Lo' in gaugemanifold and stop the 3 Close operation of the vacuum pump.

Check the condition of the scale and hold it for 1-2min. If the scale-moves back in spite of tightening, make flaring work again, the return to the beginning of 3 .

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