Trane CAUJ-C20, Инструкция по установке, эксплуатации и обслуживанию

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CAUJ-SVX01E-EN 43
above the minimum operating temperature shown in
Table 21, p. 50 .
The condensing unit operation starts and stops
automatically when the cooling demand is initiated and
terminated by the cooling circuit interlock relays.
The control components are mounted in the various
areas of the unit. See diagrams 2307-9123, 2307-9124,
2307-9125, and 2307-9126 for additional information.
Condenser Fans
20 to 60 Ton Specs
Condenser fan cycling is accomplished through
interlocking the fan operation with remote compressor
operation (5K1 & 5K2), liquid line pressure switches
(4S11 & 4S12). When the low ambient option is applied,
ambient temperature thermostats (1S36 & 1S37) are
used to provide additional fan cycling control.
Table 17,
p. 43 lists the condenser fan sequencing data. See
“Condenser Fans,” p. 42 for condenser fan locations
and designators.
Table 17. CAUJ condenser fan sequencing data: 20 to 60 ton units
Controlling Device
Fan "ON" Fan "OFF" Fan Identification
Customer Interlock Circuit 1 5K1 Closed
5K1 Open 2B2, 2B3 (a)
Customer Interlock Circuit 2 5K2 Closed
5K2 Open 2B5
(b)
, 2B6
(c)
Fan Temperature Switch (d)
1S36
67.5°F 65°F
2B3 (a)
1S37
67.5°F 65°F
2B6 (c)
Fan Pressure Switch
4S11
444 psig 255 psig
2B1
4S12
444 psig 255 psig 2B4 (b)
(a) Fan used on 25, 30, 50 and 60 ton units only.
(b)
Fan used on 40, 50 and 60 ton units only.
(c) Fan used on 50 and 60 ton units only.
(d) 1S36 and 1S37 normally-closed contacts open on ambient temperature drop to 65°F. Contacts reclose on ambient temperature rise to 65°F and 67.5°.
80 to 120 Ton Specs
Condenser fan cycling is accomplished through
interlocking the fan operation with remote compressor
operation (6K1 & 6K2), and ambient temperature
thermostats (1S42 & 1S43) are used to provide
additional fan cycling control. Table 18, p. 43 lists the
condenser fan sequencing data. See “Condenser
Fans,” p. 42 for condenser fan locations and
designators.
Table 18. CAUJ condenser fan sequencing data: 80 to 120 ton units
Controlling Device Stage
Fan ON Fan OFF Fan Identification
Customer Interlock
Circuit 1
6K1 Closed
6K1 Open 4B2, 4B5, 4B6 (a)
Customer Interlock
Circuit 2
6K2 Closed
6K2 Open 5B2, 5B5, 5B6 (a)
Fan Temperature Switch
1S42 (b)
Stage 1
53°F 45°F
4B3 (a)
Stage 2
73°F 65°F
4B1, 4B4
Fan Temperature Switch
1S43 (b)
Stage 1
53°F 45°F
5B3 (a)
Stage 2
73°F 65°F 5B1, 5B4
(a) Fan used on 100 and 120 ton units only.
(b) 1S42 and 1S43 normally-closed contacts open on ambient temperature drop to "OFF" setpoints. Contacts reclose on ambient temperature rise on "ON"
setpoints.
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