ActronAir PKY470T-6Q2, Инструкция по установке и наладке

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Installation & Commissioning Guide PKY470-700 Tri-Capacity Package with CM100 Control
Doc. No.0525-032
Ver. 9 180921
Record the discharge pressure, suction pressure, liquid line temperature and suction line temperature for both of the
systems.
Circuit 1 System (Small Compressor) Circuit 2 System (Large Compressor)
Discharge Pressure = ________________ kPa Discharge Pressure = ________________ kPa
Suction Pressure = __________________ kPa Suction Pressure = __________________ kPa
Liquid Line Temperature (LLT) = ________
0
C Liquid Line Temperature (LLT) = ________
0
C
Suction Line Temperature (SLT) = _______
0
C Suction Line Temperature (SLT) = _______
0
C
NOTE:
Accurate pressure and temperature measuring tools should be used to achieve satisfactory results.
The sensors of thermocouple must be in good contact with the area being measured and must be insulated
in order to obtain correct reading.
Checking for Subcooling:
1. From the R-410a Pressure/Temperature Chart record the corresponding Saturated Condensing Temperature
(SCT)
at the given discharge pressure.
2. Calculate the system sub-cooling using the formula below:
Subcooling = SCT - LLT
3. If subcooling is within the range 4-8K, there is no need to add/remove refrigerant.
• If subcooling is lower than 4K, the system is undercharged, it is necessary to add refrigerant.
• If subcooling is higher than 8K,the system is over charged . It is necessary to remove refrigerant.
Allow the systems to stabilise and repeat the step 1-3 until sub-cooling falls within 4-8K.
Checking for Superheat:
Maintaining the correct superheat is important for ensuring the evaporator is achieving maximum capacity and avoiding
excessive liquid refrigerant returning to the compressor.
1. From the R-410a Pressure/Temperature Chart record the corresponding Saturated Suction Temperature
(SST) at
the given suction pressure.
2. Calculate the system super heat using the formula below:
Superheat = SLT -SST
3. If superheat is within the range 2-8K, there is no need to add/remove refrigerant.
• If superheat is lower than 2K, it means that liquid refrigerant may be returning to compressor.
It is necessary to remove refrigerant or check TXV settings.
• If superheat is higher than 8K, it means that refrigeration capability of evaporator is not fully maximised.
It is necessary to add refrigerant charge or check TXV settings.
Allow the systems to stabilise and repeat the step 1-3 until superheat falls within 2-8K.
NOTE:
The above recommendations are based on design conditions of 35
0
C DB (outdoor), air entering
indoor at 27
0
C DB / 19
0
C WB (as per AS/NZS 3823.1.2).
REFRIGERANT CHARGING