Carrier 30GA - Manual (Page 3)

$»«je8ER Fl.AN«ED
WASHER
MEORRERE
SNUB8ER
. COMPRESSOR POOT
(SOCATJON SPRiNC
Fig. 2 — Compressor Mounting
Chilled Water and Drain Piping — Facing the cooler
side of the unit, the return water connection is on
the left and the leaving water connection is on the
riglrt (see Fig. 1). The connections are oriented
vertically to minimize pressure losses and to facili­
tate field piping for roof-mounted installations. A
means of venting air from the high point of the
field-installed piping should be provided. After
field piping is complete, wrap all piping with elec­
tric heating tape and cover with suitable thickness
of closed-cell insulation. The power source for the
electric heating is the 115-volt (60-FIertz only) con­
venience outlet in the bottom of the cooler section,
at compressor end. The cooler drain connection is
at compressor end (see Fig. 1). Drain piping can be
installed directly thru hole provided in cooler
section base pan. Insulate this piping, similar to
the chilled water piping, for at least one foot
from cooler.
Water Treatment — Consult local water authority
on characteristics of water in the area and add a
recommended inliibitor to the chilled water.
Power Supply ~ Electrical characteristics of avail­
able power supply must agree with unit nameplate
rating. Supply voltage must be within the limits
shown in Table 4.
IMPORTANT; Operation on improper supply
voltage or with excessive phase unbalance con-
.stitutes abuse and is not covered by Carrier
Warranty,
Power Wiring — All power wiring must comply
with applicable local and national codes. Install a
field-supplied branch circuit disconnect switch per
NEC of a type that can be locked OFF or OPEN.
FIELD CONNECTIONS
1. Main Power — Bring wires from the disconnect
switch thru hole in bottom of unit control box
(Fig. 1) and connect to terminals LI, L2, L3 on
line side of terminal block TBl (see Fig. 3).
2. Auxiliary Power — Bring separate source power
(115-1-60) into unit as shown in Fig. 1 and Fig. 3.
This supplies power for control circuit, compres­
sor crankcase heater, cooler heater and conven­
ience outlet for miscellaneous auxiliary 115-volt
applications. Connect incoming wires to TB2 in
unit control box (LI toQ] and L2 to[2]). In the
auxiliary power supply, a field-supplied dis­
connect with 15-amp circuit protection must be
provided to take care of crankcase heater and
cooler heater cable.
In compliance with NEC Article 440-14, the dis­
connect must be located within sight of and
readily accessible from the unit.
Table 4 — Electrical Data
UNIT COMPRESSOR EACi-
V d U s Max
CCB
“ F l
30GA Mode I Supp lied* MCA >"use RLA LRA Fan
Min Max P 1 MTA It
530 208/230 187 253 103 175 ......... 76 ...... ^ 345 ~6 S3 4.5
020 630 460 414 508 51 80 36 173 3 DO 1 9
130 575 518 632 41 60 28 6 120 3 1 40 1 6
530 208/230 187 253 145 225 100 446 6 ....... 7(Г“ 6.2
025 630 460 414 508 69 1 10 48 223 6 3 0
130 575 518 632 61,7 70 4d> .6 164 3 1 oT 2.4
530 208/230 187 253 168 275 \\o 506 6 83 6 2
030 630 460 414 508 72 110 ZiO 253 6 ; 35 3 0
130 575 518 632 63 5 80 45 176 3 63 2 4
No.
2.3
4 6
1 9
1 6
6 6
3 0
2 4
6 6
3 0
2.4
CCB -
FCB -
FLA -
LRA -
MCA -
RLA for each motor winding is half the value shown
MTA shown is for eacli 3-pole section of the CB (each
motor winding)
Compressor Circuit Breaker
Fan Circuit Breaker (one for all fans)
Full Load Amps (fan motors)
Locked Rotor Amps
Minimum Circuit Amps Complies with NEC, Section
430-24
FCB
MTA
29
18
14
29
18
14
29
18
14
MTA — Must Trip Amps (factory-installed circuit breaker)
P — No of poles in CCB
RLA — Rated Load Amps (compressor)
*Units are suitable for use on electrical systems where voltage
supplied to the unit terminals is not below or above the min
and max limits shown
■fAdjacent to compressor compartment (non-cycling)
NOTE Maximum allowable phase unbalance is volts, 2%:
amps, 10%