cellarking CXE 70 Technical Manual - Page 16

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IF NO ADDITIONAL REFRIGERANT CHARGE IS REQUIRED:

Open the valves very slowly using a 5 or 8mm Allen key. Replace the caps on the service ports, (torque to 25NM).

IF ADDITIONAL REFRIGERANT IS REQUIRED:

After evacuating the indoor unit and interconnecting pipework, slowly open the valves using 5 or 8mm Allen

key. The high and low pressure should equalise within a minute.

Additional charge should be introduced with the system running in the air conditioning mode

(including heat pumps). See indoor unit instruction for additional system charge.

All units are fitted with head pressure control. The link wire across the orange terminals allows

the fan to operate at full speed. THIS SHOULD BE REMOVED AFTER CHARGING

ADDITIONAL REFRIGERANT - pipe runs over 7.5m.

Add refrigerant and oil for each additional metre over 7.5m, based on the following:

Expansion line size.

Additional refrigerant (g/m).

Additional POE oil

If a manual HP cutout is fitted, ensure that the reset button is depressed.

A random start delay of up to 1 minute occurs when mains is first applied. A 3 minute delay occurs

between successive compressor operations on all systems.

Additional refrigerant and polyolester oil should be introduced through the Schrader valve on the indoor

unit, or the service port on the suction service valve on the outdoor unit. Ensure the refrigerant is the

correct type, as shown on the rating plate. R407C must always be added in the liquid state.

Run the system for a few minutes to allow it to stabilize. Where possible, charge to a sweat line on the

evaporator. Typical suction pressures on short lines at UK conditions, with high speed evaporator fan, high

speed condenser fan, should be; electromechanical comfort system approx 4.4 bar (65 psig); electronic

comfort system approx 3.8 bar (55 psig); heat pump system approx (58 psig). Systems should not be

overcharged, to avoid liquid return to the compressor.

HEAD PRESSURE CONTROL SAGINOMIYA (RGE – ZIN4 – SH)

The head pressure controller is factory set to suit the refrigerant. It may be necessary to adjust this to suit site

conditions, to raise or lower the nominal head pressure.

MCU+ REFRIGERANT

FACTORY CHARGE

FOR 7.5M RUNS AT UK CONDITIONS

MCU+

100

130

150

165

180

3/8"

1/2"

25g per 350g of additional

refrigerant to a maximum of 300g

gms

1690

1880

2060

2520

4170

4540

4640

Additional polyolester oil:

5/8"

L'Unite 181-023,

ICI Emkarate RL32S or

RL32CF, Mobil Arctic

EAL22 or EAL22C.

55908039-02