Carrier 30GA User Manual
Number One
AirConditbninq
Maker
^8^ Oivision of
Carrier Corporation
Carrier Parkway • Syracus
All units have single-pumpout control. Low-voltage units have extended voltage (208/230 v)
compressor motors. All units have compressors with suction cutoff electric unloaders.
N Y 13221
Reciprocating Liquid Chillers
60-Hertz Air-Cooled Packages
0 0 0
OVERHEAD AIR SPACE MUST
Control Box
3-5/8 in diameter hole in control box
for field main power supply
7/8-in diameter hole in control box
for control circuit wiring
3-in FPT water inlet (return)
3-in FPT water outlet (leaving)
LEGEND
RP — Removable Panel
TOP VIEW
1-in FPT water drain
5/8-in diameter hole for floor
mounting — 6 legs
1/2-13 thd for lifting eyebolt — 4 holes
115-1-60 receptacle box
Fig. 1 — Dimension Drawing
UNIT
30 G A
a”
B
c
D
E
F
'Common
4-0-
—1 SPACE FOR SERVICE
AND AIRFLOW
r\ AIRFLOW THRU
t/ CONDENSER
DIMENSIONS (ft-in.)*
020
5- 4 Va
2- 4Va
3- 1IV
025
5- 4V8
2- 4Va
3- 1IV2
3- 1%
3- 9V4
dimensions
shown on
030
6- 2V8
3- r/a
4- 10
drawing
© Carrier Coiporation 1980
Form 30GA-28SI
Table 1 — Weight Distribution
UNIT
30GA
020 ”
025
030
APPROX
OPER WT
(lb)
2695
2875 790
3270 830
CONDENSER SECTION
COOLER SECTION
1.
756 190
location
.3 J J. .
2
Weight (lb)
905
960
200
330 990
372
415 235
540
4
COMPR SECTION
3 5
6
5
2^'2
260
275
270 310
PLAN VIEW — SUPPORT POINTS
^ SAFETY CONSIDERATIONS
Installation, start-up and servicing of this equip
ment can be hazardous due to system pressures,
electrical components and equipment location
(roofs, elevated structures, etc.).
Only trained, qualified installers and service
mechanics should install, start-up and service this
equipment.
Untrained personnel can perfonn basic main
tenance functions of cleaning coils, cleaning and
replacing filters. All other operations should be
performed by trained service personnel.
When working on the equipment, observe pre
cautions in the literature, tags, stickers and labels
attached to the equipment and to any other
safety precautions that apply.
• Follow all safety codes.
• Wear safety glasses and work gloves.
• Use care in handling, rigging and setting bulky
equipment.
WARNING; Be sure power to equipment is shut
off before performing maintenance or service.
INSTALLATION
Rigging — Preferred method is with spreader bars
from above the unit, utilizing the 4 eyebolts and
washers provided in fastener package (Table 3,
items 4, 5). Otherwise, rig with chains or cables
from above, using the eyebolts. Adjust cable or
chain length so that suspension angle with top of
unit is 45° or greater. If movement with rollers is
required, do not remove the unit from the skid
until it is in final position.
Placing Unit — Locate so condenser airflow is un
restricted on all sides and on top (see Fig. 1 ).
Provide ample room for servicing cooler For re
moval from compressor end, the 4-ft clearance
shown is sufficient for all units. For removal from
opposite end, see clearance dimension on Fig. 1.
"fàble*^2 — Physical Data
025
UNIT 30 G A
APPROX NET WT (lb)
REFRIG CHARGE, R-22 (lb)
COMPR 06E*
No. Cyl...Rpm
Oil Charge (pt)t
6
COND FANS, Rpm
Motor Hp
Total Airflow (cfm)
COND COILS
Rows...Fins/ln.
Total Face Area (sq ft)
COOLER
Max Work. Press, (psig)
RefrIg Side
Water Side
Refrig Circuits
*N0 of electric unloaders: 2 = one: 3
fSee OH Charge for Carrier approved oil
020 ’
2600
55
2250
4 Ï 750
14
Propel 1 er.
V4 1
18,200 ! 25,200
V Type, Plate
2780
57 5
3265
3 124
35 4 I 39
30HR030
235
250
2
6
19
030
3175
63
3275
1750
irive, 1140
1
28,200
49 6
Erecting Unit — When unit is in proper location,
attach the 6 legs. Legs are lagged to skid at com
pressor end; screws, lockwashers and nuts are in
fastener package (Table 3, items 1, 2, 3), taped to
unit frame at condenser end. Remove 8 bolts and
2 nuts holding unit to skid and raise unit to remove
skid. Secure legs at 1,2, 3, 4, 5, 6 (Table 1). Three
mounting holes are provided at each of the 6 desig
nated points. Ten of the holes (inside compressor
section) are provided with weld nuts. Loose nuts
are furnished for the other 8 holes. In the bearing
plate at the bottom of each leg is a hole for secur
ing to supporting structure or mounting on vibra
tion isolators if required (see Fig. 1 ). Fasteners for
this mounting must be field supplied.
Table 3 — Fastener Package
TEM
i
2
3
4
5
6
7
REQ
PER
UNIT
Ï8
18
8
4
4
1
1
Screw, Hex Hd %
Lockwasher, %
Nut, Hex % - 16
Eyebolt, ^/2 — 13x1 in Lg
Washer, SAE %
Clamp, Tube
Screw, Hex Hd no 8 — 32 x %
DESCRIPTION
16x1
Lg
Lg
Compressor Mounting — As shipped, compressor is
held down by special self-locking bolts and plain
lock washers. After unit is installed, remove the
self-locking bolts one at a time and reassemble with
flanged washers and neoprene snubbers as shown in
Fig. 2. Special flanged washers and neoprene snub
bers are shipped in a cloth bag tied to one of the
compressor feet. Tighten all 4 bolts. Then loosen
each until the flanged washer can be moved side
ways with finger pressure.
$»«je8ER Fl.AN«ED
WASHER
MEORRERE
SNUB8ER
Water Treatment — Consult local water authority
on characteristics of water in the area and add a
recommended inliibitor to the chilled water.
. 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.
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.
30GA Mode I
530 208/230
020
025
030
CCB -
FCB FLA LRA -
MCA -
630
130
530 208/230
630 460 414 508 69
130
530 208/230 187
630 460
130
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
Table 4 — Electrical Data
UNIT COMPRESSOR
V
dUs
Supp lied* MCA >"use RLA LRA
Min Max
187
460
575
575
575 518 632 63 5
414
518 632 41
187
518 632 61,7
414 508 72
253
508 51
253 145
253
103 175
168 275
Max
..
.......76......
80
60
225 100 446 6
1 10
70
110
80
36 173
28 6
48
4d> .6
\\o
ZiO
45 176 3 63
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%
^ 345 ~6
120 3
223 6
164 3
506 6
253
P
3
6
CCB
1 MTA
S3
DO 1 9
1 40
.......
7(Г“
1 oT
83
; 35
“ Fl
EACi-
Fan
It
4.5
1 6
6.2
3 0
2.4
6 2
3 0
2 4
No.
2.3
4 6
1 9
1 6
6 6
3 0
2 4
6 6
3 0
2.4
FCB
MTA
29
18
14
29
18
14
29
18
14
IMPORTANT: Make provisi-on for the auxiiiaxy power to be always on (except for servicmg or prolonged shutdown) to ensure power
to the heaters.
A toggle switch (marked SW) in the control box
allows the control circuit to be manually discon
nected when necessary. This switch does not
affect the crankcase heater, cooler heater cable
or convenience outlet.
3. Control Circuit Interlocks — A flow switch
should be installed in the chilled water line to
prevent the unit from running when water is not
circulating thru the cooler. This switch (no.
HR81LG005) is available as an accessory from
the Syracuse parts center, or equivalent can be
field purchased. Also, auxiliary contacts for the
chilled water pump starter should be installed in
the control circuit as additional protection
against unit operation when pump is not run
ning. Both of these items should be electrically
interlocked in the control circuit, between
terminals [T] and [2 on TBS. See Fig. 3 for field
wiring.
UNIT CONTROL BOX
T8 I
CD [I]
L3 L2 LI
FIELD POWER SUPPLY
CWFS — Chilled Water Flow Switch
CWPS — Chilled Water Pump Starter Auxiliary Contacts
SW — On.Off Switch, Control Circuit
TB — Terminal Board
START-UP AND SERVICE
Initial Check — Do not attempt to start the liquid
EQUIP
GND
TB4
Fig. 3 — Field Wiring Connections
chiller, even momentarily, until the following steps
have been completed.
1. Check all auxiliary components such as chilled
liquid circulating pump, air handling equip
ment, or other equipment to which the chiller
supplies liquid. Consult the manufacturer’s
instructions. Pump auxiliary contactor and
flow switch interlocks must be properly in
stalled (see Fig. 3, Field Wiring Connections).
2. Check chilled water safety thermostat. (See
Safety Thermostat for adjustment.)
3. Backseat (open) compressor suction and dis
charge shutoff valves. Close valves one turn to
allow pressure to reach test gages.
4. Open liquid line valve.
5. Fill chilled liquid circuit with clean water or
other noncorrosive fluids to be cooled. Bleed
all air out of high points of system.
6. Set temperature controller (see Multiple-Step
Controller).
7. Check tightness of all electrical connections.
LEGEND
A-
SW
REMOVE RED WIRE BETWEEN Q] AND
TBS TB3
m
L_
-|cWFsh'*~'ICWPsM
CONTROL CIRCUIT
INTERLOCKS (ACCESS)
[T]
I I
(AUX)'--
___
Field Control Wiring
— Field Power Wiring
_ Factory Wiring
8. Compressor oil should be visible in bull’s-eye
(see Oil Charge).
9. Be sure there are no refrigerant leaks (see Leak
Test and Dehydration).
10. Be sure unit is fully charged with refrigerant
(see Refrigerant Charge).
11. Electrical power source must agree with name
plate rating.
12. Temperature sensor of fan cycling control must
be unobstructed (see Fan Cycling).
13. Crankcase heater must be firmly locked into
compressor crankcase. Be sure crankcase is
warm (heater should be on for 24 hours before
starting compressor).
14. Be sure compressor floats freely on the mount
ing springs. See Compressor Mounting section
and Fig. 2 for installation of loose washers and
snubbers.
Leak Test and Dehydration — All 30GA units are
shipped with complete operating charge of Refrig
erant 22 (Table 1) and should be under sufficient
pressure to conduct leak test after installation. If
there is no system pressure, admit refrigerant until
a pressure is observed and then proceed to test for
EQUIP GND
(Z)—1
TB2
p
3 q
LI L2
AUXILIARY
POWER SUPPLY
r+-
DISCONNECT PER NEC
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