AMX PTM-D15 Service Manual download pdf (Page 49)

Valve

Single valve

Charge liquid refrigerant with

cylinder in up-side-down position.

Single valve (with siphon tube)

Charge with cylinder in normal position.

Liquid

Valve

Liquid

Charging

cylinder

Open

Refrigerant

cylinder

Liquid

NO!

CAUTION

Never charge a large amount

of liquid refrigerant at once to

the unit. This may cause

damage to the compressor.

CAUTION

To prevent the composition

of R410A from changing,

never bleed the refrigerant

gas into the atmosphere

while transferring the

refrigerant. (Fig. 3)

(5) Recharging

Be sure to charge the specified amount of

refrigerant in liquid state

using the service port

of the wide tube service valve. The proper

amount is listed on the unit's nameplate.

When the entire amount cannot be charged all at

once, charge gradually while operating the unit in

Cooling Operation.

When charging with a refrigerant cylinder, use an

electronic scale for charging refrigerant. In this

case, if the volume of refrigerant in the cylinder

becomes less than 20% of the fully-charged

amount, the composition of the refrigerant starts

to change. Thus,

do not use the refrigerant if

the amount in the charging cylinder is less

than 20%.

Also, charge the minimum necessary amount to

the charging cylinder before using it to charge

the air conditioning unit.

Example:

In case of charging refrigerant to a unit requiring

1.68 lb. (0.76 Kg) using a capacity of a 22 lb. (10

Kg) cylinder, the minimum necessary amount for

the cylinder is:

1.68 + 22 0.20 = 6.08 lb.

(0.76 + 10 0.20 = 2.76 Kg)

For the remaining refrigerant, refer to the

instructions of the refrigerant manufacturer.

If using a charging cylinder, transfer the specified

amount of liquid refrigerant from the refrigerant

cylinder to the charging cylinder.

Prepare an evacuated charging cylinder

beforehand.

Do not use the refrigerant if the amount in the

charging cylinder is less than 20%.

Configuration and characteristics of cylinders

Fig. 1

Fig. 2

Fig. 3

1 ... 48 49 50 ... 77

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AMX PTM-D15 Service Manual Page 49

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