Carrier 30H - Manual (Page 5)

COMPLETE UNIT
Table 4 — Electrical Data; 3-Phase, 60-Hertz
Nameplate
VOLTS
200 230 460 575 06E COMPR
Supply Range" 180-229 207-264 414-528 518-660 USAGEt
Max Max Max Max
UNIT 30 MKW MCA Fuse MCA Fuse MCA Fuse MCA Fuse
Cl rcuit
Amps Amps Amps Amps l' ( l (^''' 2'{R) /^
040 50.4 194 250 167 225 84 110 68 90 B250 B250
H 050 61.1 230 300 207 300 104 150 84 125 I J275 B250
060 71.8 259 350 239 300 120 150 97 125 J275 ; J275
INDIVIDUAL COMPRESSORS
COMPR 200 V 230 V 460 V ... 575........................
UNIT 30 nctr KW
06 E RLA LRA ; MTA RLA LRA MTA RLA LRA MTA RLA LRA MTA
; 040 250 (2) 25 2 86 345 ; eo..; 74 300 102 37 150 50 30 120 42
275 (L) 35.9 11 5 506 ' 80 " 106 440 "i 72.......... '' 53 220 73 43 176 58
П L/OU
250 (R) 25.2 86 345 74 300 ; 102 37 150 50 30 ; 120 42
060 275 (2) 35.9 115 506 Í" 80" 106 440 1......72 ' 1 53 220 73 43 176 : 58
6-Pole Breakers: values shown are for each 3-poie
section.
KW — Maximum Power Input (compressor)
LRA — Locked Rotor Amps
MCA — M inimum Circuit Amps. Complies with National Elec­
trical Code (NEC), Section 430-24.
MKW — Unit Power Input at operating conditions of 50 F Leaving
Chilled Water Temperature (44 F Saturated Suction
Temperature) and 145 F Saturated Discharge
Temperature.
MTA — Must Trip Amps (Factory-installed circuit breaker)
RLA — Rated Load Amps
*Untts are suitable for use on electrical systems where voltage
supplied to the unit terminals is not below or above the range
limits shown.
fPrefix: B, J = 1 electric unloader.
ELECTRICAL BOX CONTROL SECTION
Inside this section are: relays, high- and low-
pressure cut-outs, low water-temperature cut-out,
timer, terminal strips and a 4-step temperature
controller. On the outside (control panel) are: con­
trol
circuit ON-OFE switch, partial load switch,
compressor transfer switch, compressor run light,
safety trip lights and control circuit fuse. The control
panel is hinged to provide easy access to the controls
inside.
ELECTRICAL BOX, POWER SECTION
The main electrical power supply is brought in
thru the top of the electrical box, on the left-hand
side (see Fig. 1). The hole is suitable for accommo­
dating
3-in. conduit. Pressure-lug connections on
the terminal block are suitable for copper, copper-
clad aluminum or aluminum wire.
In this section are: main power terminal block,
compressor circuit breakers with calibrated mag­
netic trip (for compressor motor overload and
locked rotor protection) and compressor motor con­
tactors. The panel over this section is secured with
screws as a safety measure against casual entry for
purposes other than service.
START-UP AND SERVICE
WARNING: Shut off all power to the unit
before proceeding with any service work.
INITIAL CHECK
Do not start the liquid chiller even momentarily
until the following steps have been completed.
1. Check all auxiliary components such as chilled
liquid circulating pump, cooling tower if used,
air handling equipment, or other equipment to
which the chiller supplies liquid. Consult the
manufacturer’s instructions.
2. Check safety thermostat. See Safety
Thermostat.
3. Determine if there is a refrigerant charge in the
system. See Check Refrigerant Charge.
4. Backseat (open) compressor suction and dis­
charge shutoff valves.
5. Open liquid line shutoff valves.
6. Fill chilled liquid circuit completely with clean
water or other noncorrosive fluid to be cooled.
Bleed all air out of high points of system.
7. Fill cooling tower for condenser cooling water.
8. Set temperature controller.
9. Check tightness of all electrical connections..
10. Check compressor oil (should be visible in
bull’s-eye). Refer to Check Oil Charge.
11. Be sure crankcase of each compressor is warm
(heaters should be on for 24 hours before
starting compressors).
12. Be sure compressors are floating freely. See
INSTALLATION, Step 3.