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8 

CAUTION 

7. 

Leak detection methods 

 

Electronic leak detectors shall be used to detect flammable refrigerants, but the sensitivity may not be adequate, or may need re-
calibration. 
(Detection equipment shall be calibrated in a refrigerant-free area.) 

 

Ensure that the detector is not a potential source of ignition and is suitable for the refrigerant used. 

 

Leak detection equipment shall be set at a percentage of the LFL of the refrigerant and shall be calibrated to the refrigerant 
employed and the appropriate percentage of gas (25 % maximum) is confirmed. 

 

Leak detection fluids are suitable for use with most refrigerants but the use of detergents containing chlorine shall be avoided as the 
chlorine may react with the refrigerant and corrode the copper pipe-work. 

 

If a leak is suspected, all naked flames shall be removed/extinguished. 

 

If a leakage of refrigerant is found which requires brazing, all of the refrigerant shall be recovered from the system, or isolated (by 
means of shut off valves) in a part of the system remote from the leak. Oxygen free nitrogen (OFN) shall then be purged through 
the system both before and during the brazing process. 

8. 

Removal and evacuation 

 

When breaking into the refrigerant circuit to make repairs – or for any other purpose – conventional procedures shall be used. 
However, it is important that best practice is followed since flammability is a consideration. 
The following procedure shall be adhered to: 

 

• remove refrigerant -> • purge the circuit with inert gas -> • evacuate -> • purge again with inert gas -> 
• open the circuit by cutting or brazing 

 

 

The refrigerant charge shall be recovered into the correct recovery cylinders. 

 

The system shall be “flushed” with OFN to render the unit safe. 

 

This process may need to be repeated several times. 

 

Compressed air or oxygen shall not be used for this task. 

 

Flushing shall be achieved by breaking the vacuum in the system with OFN and continuing to fill until the working pressure is 
achieved, then venting to atmosphere, and finally pulling down to a vacuum. 

 

This process shall be repeated until no refrigerant is within the system. 

 

When the final OFN charge is used, the system shall be vented down to atmospheric pressure to enable work to take place. 

 

This operation is absolutely vital if brazing operations on the pipe work are to take place. 

 

Ensure that the outlet for the vacuum pump is not close to any ignition sources and there is ventilation available. 

9. 

Charging procedures 

 

In addition to conventional charging procedures, the following requirements shall be followed. 
-       Ensure that contamination of different refrigerants does not occur when using charging equipment. 
-       Hoses or lines shall be as short as possible to minimize the amount of refrigerant contained in them. 
-       Cylinders shall be kept upright. 
-       Ensure that the refrigeration system is earthed prior to charging the system with refrigerant. 
-       Label the system when charging is complete (if not already). 
-       Extreme care shall be taken not to over fill the refrigeration system. 

 

Prior to recharging the system it shall be pressure tested with OFN (refer to #7). 

 

The system shall be leak tested on completion of charging but prior to commissioning. 

 

A follow up leak test shall be carried out prior to leaving the site. 

 

Electrostatic charge may accumulate and create a hazardous condition when charging and discharging the refrigerant. 
To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before 
charging/discharging. 

10. 

Decommissioning 

 

Before carrying out this procedure, it is essential that the technician is completely familiar with the equipment and all its details. 

 

It is recommended good practice that all refrigerants are recovered safely. 

 

Prior to the task being carried out, an oil and refrigerant sample shall be taken in case analysis is required prior to re-use of 
reclaimed refrigerant. 

 

It is essential that electrical power is available before the task is commenced. 

a)

 

Become familiar with the equipment and its operation. 

b)

 

Isolate system electrically. 

c)

 

Before attempting the procedure ensure that: 

 

• mechanical handling equipment is available, if required, for handling refrigerant cylinders; 
• all personal protective equipment is available and being used correctly; 
• the recovery process is supervised at all times by a competent person; 
• recovery equipment and cylinders conform to the appropriate standards. 

 
d)

 

Pump down refrigerant system, if possible. 

e)

 

If a vacuum is not possible, make a manifold so that refrigerant can be removed from various parts of the system. 

f)

 

Make sure that cylinder is situated on the scales before recovery takes place. 

g)

 

Start the recovery machine and operate in accordance with manufacturer’s instructions. 

h)

 

Do not over fill cylinders. (No more than 80 % volume liquid charge). 

i)

 

Do not exceed the maximum working pressure of the cylinder, even temporarily. 

j)

 

When the cylinders have been filled correctly and the process completed, make sure that the cylinders and the  

 

equipment are removed from site promptly and all isolation valves on the equipment are closed off. 

k)

 

Recovered refrigerant shall not be charged into another refrigeration system unless it has been cleaned and checked. 

 

Electrostatic charge may accumulate and create a hazardous condition when charging or discharging the refrigerant.  
To avoid fire or explosion, dissipate static electricity during transfer by grounding and bonding containers and equipment before 
charging/discharging. 

9 

CAUTION 

11. 

Labelling 

 

Equipment shall be labelled stating that it has been de-commissioned and emptied of refrigerant. 

 

The label shall be dated and signed. 

 

Ensure that there are labels on the equipment stating the equipment contains flammable refrigerant. 

12. 

Recovery 

 

When removing refrigerant from a system, either for servicing or decommissioning, it is recommended good practice that all 
refrigerants are removed safely. 

 

When transferring refrigerant into cylinders, ensure that only appropriate refrigerant recovery cylinders are employed. 

 

Ensure that the correct number of cylinders for holding the total system charge are available. 

 

All cylinders to be used are designated for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders for the 
recovery of refrigerant). 

 

Cylinders shall be complete with pressure relief valve and associated shut-off valves in good working order. 

 

Recovery cylinders are evacuated and, if possible, cooled before recovery occurs. 

 

The recovery equipment shall be in good working order with a set of instructions concerning the equipment that is at hand and shall 
be suitable for the recovery of flammable refrigerants. 

 

In addition, a set of calibrated weighing scales shall be available and in good working order. 

 

Hoses shall be complete with leak-free disconnect couplings and in good condition. 

 

Before using the recovery machine, check that it is in satisfactory working order, has been properly maintained and that any 
associated electrical components are sealed to prevent ignition in the event of a refrigerant release. 
Consult manufacturer if in doubt. 

 

The recovered refrigerant shall be returned to the refrigerant supplier in the correct recovery cylinder, and the relevant Waste 
Transfer Note arranged. 

 

Do not mix refrigerants in recovery units and especially not in cylinders. 

 

If compressors or compressor oils are to be removed, ensure that they have been evacuated to an acceptable level to make certain 
that flammable refrigerant does not remain within the lubricant. 

 

The evacuation process shall be carried out prior to returning the compressor to the suppliers. 

 

Only electric heating to the compressor body shall be employed to accelerate this process. 

 

When oil is drained from a system, it shall be carried out safely. 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

10 

Performance Test Condition 

EUROVENT 

Power Supply 

Phase, Hz 

Single, 50 

V 230 

 Min. 

Mid. 

Max. 

Cooling 

Capacity 

kW 1.80  2.00  2.90 

BTU/h 6140 

6820 

9890 

Running Current 

A 

– 

2.70 

– 

Input Power 

W 

340 

550 

860 

Annual Consumption 

kWh 

– 

275 

– 

EER W/W 

5.29  3.64  3.37 

Indoor Noise (H / L / QLo) 

dB-A 

34 / 29 / 26 

Power Level dB 

50 / – / – 

Heating

 

Capacity 

kW 1.20  3.20  4.10 

BTU/h 4090 

10900  14000 

Running Current 

A 

– 

4.10 

– 

Input Power 

W 

300 

840 

1.33k 

COP W/W 

4.00  3.81  3.08 

Indoor Noise (H / L / QLo) 

dB-A 

36 / 29 / 26 

Power Level dB 

52 / – / – 

Indoor Fan

 

Type  

SIROCCO 

Material  

GFZ010A 

/ 

GF20 

Motor Type 

 

DC / Transistor (8-poles) 

Input Power 

W 

– 

Output Power 

W 

51 

Speed 

QLo 

Cool rpm 

800 

Heat rpm 

790 

Lo 

Cool rpm 

880 

Heat rpm 

860 

Me 

Cool rpm 

970 

Heat rpm 

960 

Hi 

Cool rpm 

1070 

Heat rpm 

1070 

SHi 

Cool rpm 

1120 

Heat rpm 

1120 

Moisture Removal 

L/h (Pt/h) 

1.3 (2.7) 

Indoor 

Airflow 

QLo 

Cool m

3

/min (ft

3

/min.) 7.3 

(260) 

Heat m

3

/min (ft

3

/min.) 7.2 

(250) 

Lo 

Cool m

3

/min (ft

3

/min.) 8.2 

(290) 

Heat m

3

/min (ft

3

/min.) 7.9 

(280) 

Me 

Cool m

3

/min (ft

3

/min.) 9.0 

(320) 

Heat m

3

/min (ft

3

/min.) 8.9 

(310) 

Hi 

Cool m

3

/min (ft

3

/min.) 10.1 

(355) 

Heat m

3

/min (ft

3

/min.) 10.1 

(355) 

SHi 

Cool m

3

/min (ft

3

/min.) 10.5 

(370) 

Heat m

3

/min (ft

3

/min.) 10.5 

(370) 

Dimension 

Height (I/D) 

mm (inch) 

200 (7-7/8) 

Width (I/D) 

mm (inch) 

750 (29-17/32) 

Depth (I/D) 

mm (inch) 

640 (25-7/32) 

11 

Weight 

Net (I/D) 

kg (lb) 

19 (42) 

Piping 

Pipe Diameter  

(Liquid / Gas) 

mm (inch) 

6.35 (1/4) / 9.52 (3/8) 

Drain Hose 

Inner Diameter 

mm  

16 

Length mm 

117.5 

Indoor Heat 

Exchanger 

Fin Material 

 

Aluminium (Pre Coat) 

Fin Type 

 

Slit Fin 

Row × Stage × FPI 

 

3 × 12 × 18 

Size (W × H × L) 

mm 

590 × 282 × 38.1 

Air Filter 

Material  

– 

Type  

– 

Power Supply 

 

Outdoor 

Power Supply Cord 

A 

Nil 

Thermostat  

Electronic 

Contol 

Protection Device 

 

Electronic Contol 

 

Dry Bulb 

Wet Bulb 

Indoor 

Operation 

Range 

Cooling 

Maximum °C 

32 

23 

Minimum °C 

16 

11 

Heating 

Maximum °C 

30 

– 

Minimum °C 

16 

– 

 
1. 

Cooling capacities are based on indoor temperature of 27°C Dry Bulb (80.6°F Dry Bulb), 19.0°C Wet Bulb (66.2°F Wet Bulb) and outdoor air 
temperature of 35°C DRY BULB (95°F Dry Bulb), 24°C Wet Bulb (75.2°F Wet Bulb). 

2. 

Heating capacities are based on indoor temperature of 20°C Dry Bulb (68°F Dry Bulb) and outdoor air temperature of 7°C Dry Bulb (44.6°F 
Dry Bulb), 6°C Wet Bulb (42.8°F Wet Bulb). 

3. 

Heating low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor 2/1°C. 

4. 

Heating extreme low temperature capacity, Input Power and COP measured at 230 V, indoor temperature 20°C, outdoor -7/-8°C. 

5. 

Standby power consumption ≤10.0w (when switched OFF by remote control, except under self protection control). 

6. 

Specifications are subjected to change without prior notice for further improvement.