ActronAir PKV160T, Руководство по установке и пусконаладке

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Installation and Commissioning Guide - Package Ducted Variable Capacity Commercial
Doc. Part No. 0525-076 Ver. 3 210414
Installation and Commissioning Guide
Variable Capacity Commercial
50
Record the discharge pressure, suction pressure, liquid line temperature and suction line temperature for all of the
refrigeration circuits:
Discharge Pressure: kPa
Liquid Line Temperature ( LLT ): °C
Suction Pressure: kPa
Suction Line Temperature (
SLT
) °C
NOTE
Accurate pressure and temperature measuring tools should be used to achieve satisfactory results.
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 subcooling using the formula below:
Subcooling = SCT - LLT
3. If subcooling is within the range (see charging table below), there is no need to add/remove refrigerant.
●
If subcooling is lower than minimum, the system is undercharged, it is necessary to add refrigerant.
●
If subcooling is higher than maximum, the system is over charged . It is necessary to remove refrigerant.
Allow the systems to stabilise (15-30 mins) and repeat the step 1-3 until subcooling falls within the range specified in the
table below.
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 superheat using the formula below:
Superheat = SLT -SST
3. If superheat is within the range (see charging table below), there is no need to add/remove refrigerant.
●
If superheat is lower than minimum, it means that liquid refrigerant may be returning to compressor. It is
necessary to remove refrigerant or check EEV settings.
●
If superheat is higher than maximum, it means that refrigeration capability of evaporator is not fully maximised.
It is necessary to add refrigerant charge or check EEV settings. Allow the systems to stabilise (15-30 mins) and
repeat the step 1-3 until superheat falls within the range specified in the table below:
Models
COOLING HEATING
Subcooling Superheat Subcooling Superheat
PKV160T 7 �1 3 �1 12 �1 2 �1
PKV180T
8 �1 4 �1 13 �1 6 �1
PKV210T
8 �1 4 �1 14 �1 2 �1
PKV240T 9 �1 7 �1 14 �1 1 �1
NOTES
The above subcooling and superheat recommendations are based on the following rated conditions:
• Cooling: 35°C DB outdoor, air entering indoor at 27°C DB / 19°C WB.
• Heating: 7°C DB / 6°C WB outdoor, air entering indoor at 20°C DB Nominal indoor airflow.