Trane AquaStream 2 CGWN Series - Interconnection between CCUN and Remote Condenser

25CG-SVX06F-GB
Installation
Interconnection
between CCUN and Remote
Condenser
The CCUN has the capability to
control the fan staging of the remote
condenser if the option is taken. Each
refrigerant circuit can control from
one up to 6 fans per circuit using
a 4 output relays (10A/250VAC/
AC1/SPDT) card option provided
in the control box of the CCUN.
The external wiring to the remote
Table 8 - Control output relays
Output relay Fan 1 Fan 2 Fan 3 Fan 4 Fan 5 Fan 6
Fan Option
Low Speed High Speed Single speed
2
Two fan speed first fan
1&4 3 Single speed only fans
3
1234 Two fan speed first fan
1 3 4 Single speed only fans
4
12344 Two fan speed first fan
1 3 4 4 Single speed only fans
5
123444 Two fan speed first fan
1 3444 Single speed only fans
6
1233444Two fan speed first fan
1 33444Single speed only fans
Table 9 - Fan staging - Example : 4 fans per circuit, single speed
Stage Number of Fans
Standard - 4 fans per circuit Relays Energized
Capacity [%]
1234
0 0 00000.00
1 1 100025.00
2 2 101050.00
3 3 001175.00
4 4 1011100.00
Table 10 - Fan staging - Example : 4 fans per circuit with first fan 2-speed
Stage Number of Fans
Low Ambient 2 Speed 4 fans per circuit Relays Energized
Capacity [%]
1234
0 0 00000.00
10.5100012.50
2 1 001025.00
31.5101037.50
4 2 000150.00
52.5100162.50
6 3 001175.00
73.5101187.50
8 4 0111100.00
condenser shall be connected directly
to the terminal block for the optional
fan relay cards.
CAUTION:
Power supply to the outdoor fan
relays shall not be provided from
the CCUN unless special care to
the Voltage and to the power
consumption was evaluated.