Precision Air Conditioning
SmartCool
TM
– D
Precision Air Conditioning
Installation, Maintenance and Commissioning Manual :6877419 02/2013
If the system is configured with the SmartCool higher than the condenser unit h it may
be required to increase the degree of sub cooling to prevent flashing gas. This flashing is
caused by excess pressure drop caused by the static head of refrigerant and can cause
poor operation of the evaporator and metering device.
Careful pipe sizing is recommended to ensure that the liquid does not form gas due to
excess pressure drop
Increasing the liquid line size minimizes pipe friction and flashing due to friction pressure
drop.
However as a fail safe it is recommended that the condenser is installed below the
indoor unit to allow for correct liquid drain.
The liquid line of the system must be insulated if passing through extremely warm places
(Boiler houses etc). Ensuring that the refrigerant does not become flash gas.
Condenser above Air Handling Unit
Condenser below Air Handling Unit
t
4m
t
Discharge Line Liquid Diagrams above for illustration only
The following information can be used to estimate the refrigerant quantity required in a
typical split system installation.
(kg/Circuit)
The following table shows the refrigerant charge / circuit for the indoor and outdoor units.
Indoor Unit Standard Condenser Larger Condenser
(Indoor Unit) kg/Circuit
HGRH
kg/Circuit (Outdoor Unit) kg/Circuit (Outdoor Unit) kg/Circuit
SC19D055-X2X2
4.41 4.56
CR50
4.9
CR65
9.78
SC19D070-X2X2
4.66 4.81
CR65
9.78
CR80
8.37
SC19D080-X2X2
4.66 4.81
CR65
9.78
CR80
8.37
SC25D080-X2X2
5.84 6.04
CR65
9.78
CR80
8.37
SC25D090-X2X2
6.37 6.60
CR65
9.78
CR80
8.37
SC25D100-X2X2
6.38 6.60
CR80
8.37
CR105
16.72
SC31D100-X2X2
7.56 7.83
CR80
8.37
CR105
16.72
SC31D120-X2X2
7.57 7.83
CR105
16.72
CR130
22.05
SC31D130-X2X2
7.67 7.94
CR105
16.72
CR130
22.05
SC19D033-X2C0
4.34 4.49
CR50
4.9
CR65
9.78
SC19D038-X2C0
4.59 4.74
CR65
9.78
CR80
8.37
SC19D045-X2C0
4.59 4.74
CR65
9.78
CR80
8.37
SC19D064-X2C0
5.13 5.33
CR105
16.72
CR130
22.05
SC19D070-X2C0
5.13 5.34
CR105
16.72
CR130
22.05
SC19D076-X2C0
5.14 5.34
CR105
16.72
CR130
22.05
SC25D045-X2C0
5.77 5.97
CR65
9.78
CR80
8.37
SC25D050-X2C0
6.31 6.53
CR65
8.37
CR80
8.37
SC25D055-X2C0
6.31 6.53
CR80
8.37
CR105
16.72
SC25D067-X2C0
6.31 6.56
CR105
16.72
CR130
22.05
SC25D073-X2C0
6.32 6.57
CR105
16.72
CR130
22.05
SC25D080-X2C0
6.32 6.57
CR105
16.72
CR130
22.05
SC31D055-X2C0
7.49 7.75
CR80
8.37
CR105
16.72
SC31D065-X2C0
7.49 7.76
CR105
16.72
CR130
22.05
SC31D075-X2C0
7.49 7.76
CR105
16.72
CR130
22.05
SC31D077-X2C0
7.50 7.79
CR105
16.72
CR130
22.05
SC31D080-X2C0
7.50 7.79
CR105
16.72
CR130
22.05
SC31D083-X2C0
7.50 7.79
CR105
16.72
CR130
22.05
(1)Fitted with optional hot gas re-heat
Installation
Warning: May have flash gas occurring
in liquid line if riser friction losses are
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