APC INROOM ACPSC3000 Operations Instructions download pdf (Page 41)

InRoom CW/DX – Operating Instructions

TCE

PSL

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- Systems without refrigerant receiver or sight glass must always be ﬁ lled according to weight.

- Systems with refrigerant receiver should be ﬁ lled according to weight but can also be ﬁ lled by checking

the sight glass.

Note:

If you use the refrigerant R407C, note that R407C is a ternary blend. Take care that you add

refrigerant in a liquid state, as the ratio of the refrigerant components changes if one of

the three compounds passes over into the gaseous phase.

- Before the system is ﬁ lled with refrigerant, it must be clean and dry inside. Then proceed as follows:

The standing refrigerant bottle is connected to the suction side with a pressure gauge station. The weight

is noted shortly before ﬁ lling. The speciﬁ ed amount of refrigerant is now added when the system is ope-

rating. During ﬁ lling the

pressure in the refrigerant bottle will adjust to that of the system. Filling is then no

longer necessary.

This can be seen by the icing up of the bottle or by checking the pressure gauge. The bottle valve must

then be closed until a pressure increase has taken place which is above the suction pressure of the

system. This process can be accelerated if the bottle is wrapped in hot moist towels or it is placed in a

water bath at a maximum temperature of 50°C (120°F).

Danger:

Never heat up the refrigerant bottle with an open ﬂ ame as there is a risk of explosion.

6.3.2.3 Filling systems with R407C refrigerants

Open the stop valves, provide the expansion valve with 24 VAC and ﬁ ll the refrigerant circuit with refrigerant

until both sides of the refrigerant system equalizes.

Compressor

Condenser

Check valve

(optional)

Receiver

Safety valve

Cooling unit

external installation

Open stop

valves

connect to

24 VAC

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APC INROOM ACPSC3000 Operations Instructions Page 41