Trane CGWH 115 - Page 9

9CGWH-SVX01D-E4
Installation
The minimum required subcooling
at the remote condenser level when
installed below is defined in the
following table.
Example : If the remote condenser
is 10m below the CCUH and the
condensing temperature is 50°C,
the refrigerant subcooling leaving
the remote condenser shall not be
below 4°C. To increase the amount of
subcooling, more refrigerant charge
is required.
For refrigerant piping longer than
50 m (distance of the condensing
unit to the evaporator), a pressure
relief valve on each circuit is
Table 5 - Required discharge line diameter CCUH circuit 1 (for vertical risers)
Leaving chilled water temperature (°C)
Unit size -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
115 7/8” 1”1/8
120 7/8” 1”1/8 1”3/8
125 7/8” 1”1/8 1”3/8
225 7/8” 1”1/8
230 7/8” 1”1/8 1”3/8
235 7/8” 1”1/8 1”3/8
240 7/8” 1”1/8 1”3/8
250 7/8” 1”1/8 1”3/8
Table 6 - Required discharge line diameter CCUH circuit 2 (for vertical risers)
Leaving chilled water temperature (°C)
Unit size -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
225 7/8” 1”1/8
230 7/8” 1”1/8
235 7/8” 1”1/8
240 7/8” 1”1/8 1”3/8
250 7/8” 1”1/8 1”3/8
Table 7 - Required discharge line diameter CCUH circuit 1 (either vertical or horizontal)
Leaving chilled water temperature (°C)
Unit size -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
115 5/8” 7/8”
120 5/8” 7/8” 1”1/8
125 5/8” 7/8” 1”1/8
225 5/8” 7/8”
230 5/8” 7/8” 1”1/8
235 5/8” 7/8” 1”1/8
240 5/8” 7/8” 1”1/8
250 5/8” 7/8” 1”1/8
Table 8 - Required discharge line diameter CCUH circuit 2 (either vertical or horizontal)
Leaving chilled water temperature (°C)
Unit size -12 -10 -8 -6 -4 -2 0 2 4 6 8 10 12 14
225 5/8” 7/8”
230 5/8” 7/8”
235 5/8” 7/8”
240 5/8” 7/8” 1”1/8
250 5/8” 7/8” 1”1/8
Table 4 - Maximum elevation (H) of CCUH above remote condenser
Condensing dew temperature °C
Subcooling °C 20°C 35°C 50°C 65°C
4°C 4 m 6 m 8 m 10 m
6°C 8 m 12 m 16 m 20 m
8°C 12 m 17 m 23 m 30 m
10°C 16 m 23 m 30 m 40 m
12°C 20 m 28 m 38 m 49 m
necessary. It has to be located on the
suction side.