Friedrich MRM09Y1J Service Manual

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Installation and Maintenance
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– Connect the charge hose which you dis-connected from the
vacuum pump to the valve at the bottom of the cylinder.
– If you are using a gas cylinder, also use a scale and reverse
the cylinder so that the system can be charged with liquid.
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– Open the valve at the bottom of the cylinder and press the
check valve on the charge set to purge the air. (Be careful of
the liquid refrigerant).
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– If the system can not be charged with the specified amount of
refrigerant, it can be charged with a little at a time
(approximately 150g each time) while operating the air
conditioner in the cooling cycle; however, one time is not
sufficient, wait approximately 1 minute and then repeat the
procedure (pumping down-pin).
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– Stopping partway will allow the gas to be discharged.
– If the system has been charged with liquid refrigerant while
operating the air conditioner turn off the air conditioner before
disconnecting the hose.
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– Use torque wrench to tighten the service port nut to a torque
of 1.8 kg.m.
– Be sure to check for gas leakage.
Lo
Open
Open
3-Way
valve
3-Way
valve
Gas side
CLOSEOPEN
Outdoor unit
Liquid side
Indoor unit
This is different from previous procedures.
Because you are charging with liquid refrigerant
from the gas side, absolutely do not attempt to
charge with larger amounts of liquid refrigerant
while operating the air conditioner.

Friedrich MRM09Y1J Specifications

General

Brand	Friedrich
Model	MRM09Y1J
Category	Air Conditioner
Language	English