Carrier 30GT User Manual
HEATING L
COOLlNG
30GT
1
K,HL
/ckage
SAFETY CONSIDERATIONS
Installing, starting-up and servicing air conditioning
equipment can be hazardous due to system pressures,
electrical components and equipment location,
Only trained, qualified installers and service technicians should install, start up and service this equipment.
When working on air conditioning equipment, observe
precautions in the literature and on tags, stickers and
labels attached to the equipment.
Follow all safety codes. Wear safety glasses and work
gloves. Use care in handling equipment.
INTRODUCTION
These instructions cover field installation of the Acces-
sory Hot Gas
ByPass Valve and solenoid pilot valve on
the following chi lers:
30HK,HL015 through 060 (50 and 60 Hz)
30GB040,045,055,070 (60 Hz), Flotronic’”
30GB040,046,050,055,070 (50 Hz), Flotronic’”
30GB075 through 200 (50 and 60 Hz), Flotronic’”
30GTOl5,025,030,035 (60 Hz)
30GT020,025,030 (50 Hz)
On Flotronic chillers with no unloaders or 2 unloaders,
the accessory hot gas bypass must be added to both
circuits because of
ati
automatic lead-lag feature.
INSTALLATION
Step 1
age includes hot gas bypass va ve, solenoid pilot valve
and instructions. Examine each item. If any part is
damaged or missing, file a claim immediately with the
shipping agent.
Step 2
-
Examine
-
Install Piping
Packa
e Contents
B
-
Pack-
I II
COOLER
w&i+
STUB
(SEALED FROM
SEE NOTE I
TXV -
TH ER MOSTATI.C EXPANSION VALVE
b &
FACTORY PIPING
---
b a---
FIELD PIPING
NOTES:
1. %-in. OD for 30HI5,HL and 30GT;
2. The bypass valve In this package has %-in. connections and can be used directly on 30HK,HL and 30GT units.
3. On 30GB units, a change from
’
FACTORY
1
FIELD-SUPPLIED BYPASS LINE
Fig. 1- Schematic Piping;
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
PC111 Catalog No. 533-039
I
I mm
S/sin.
d--t
3
LINE
BYPASS VALVE {;.OD CONN.) SEE NOTE 2
%-in.
OD for 30GB.
to gin. must be made either at the valve or at the stubs.
30HK,HLO15-060; 30GT015-035
Printed in U.S.A. Form 30G,H-1 SI
SUCTION LINE
LIQUID
LINE (CIRCUIT ~0.1)
;;;BN&<A;ED
HOT GAS DISCHARGE
RI
FROM FACTORY
c
CONDENSER
2-89
1
1
Replaces: 30GB,H-1SI
.-
UNITS 30HK,HLO15-060 and
Bvnass
Line - Connect the field-supplied line to the
factory-provided stubs in the discharge line
circuit no. 1 compressor and in the circurt no. 1
between expansion valve and cooler (stubs are sealed
from factory).
Bypass Valve - Install the valve in the
close to the cooler as possible. This
storage between valve and cooler when valve is closed
and prevents flood of liquid refrigerant when the valve
opens. To ensure proper closing, install the bypass valve
in a horizontal section of the bypass line, with the pilot
valve installed vertically (coil on top).
Solenoid Pilot Valve - Install on the bypass valve at the
external equalizer
outlet side of the pilot valve is a l/4-in. SAE thread. Run
a l/4-in. OD tube from this connection to the thermostatic expansion valve (TXV) equalizer line, If the
connection is made directly to the TXV, use a
x l/4-in. female flare tee. If the connection is made into
the equalizer line, use a standard l/4-in. FL tee.
@/&in.
$?TO%-035
OD sweat connection). The
(See Fig. 1.)
*fro-m
hquld
bypass
mimmrzes
l/4-in.
the
line,
line as
liquid
FL
FLOTLWWW” UNITS,
Bypass Line - Install field-supplied line between the
header on inlet side of lead coil and the entrance to the
cooler. Two factory-sealed stubs are provided in each
circuit, one on the lead coil header and one on the liquid
line between the Flotronic expansion valve (EXV) and
the cooler.
NOTE: The 30GB 1 lo-200 units have 2 stubs in the high
side of each circuit, one on each lead coil header; it is
necessary to connect piping to only one of these stubs.
Bvpass Valve - Install the valve in the bypass line as
close to the cooler as possible. This minimizes liquid
storage between the valve and cooler when valve is
closed and prevents flood of liquid refrigerant when the
valve opens. To ensure proper closing, install the by ass
valve in a horizontal section of the bypass line, witRthe
pilot valve installed vertically (coil on top).
Solenoid Pilot Valve - Install on the bypass valve at
the external equalizer. The outlet side of the pilot valve is
a l/4-in. SAE thread. Run a l/4-in. OD tube from this
connection to the suction valve of the lead compressor
in the circuit.
30GB040-200
(See Fig. 2.)
SUCTION LINE VALVE
EXV- ELECTRONIC EXPANSION VALVE
TXV- THERMOSTATIC EXPANSION VALVE
-FACTORY
NOTE: Circuit 2 should be piped same as circuit 1. The %-in, tube should be connected to the lead compressor in both circuits.
PIPING
CKT CKT CKT
b
b
040-
060
CKT
&o
Fig. 2 -Schematic Piping; 3OGBO40-200, with Electronic Controls (Flotronic)
E=ZaFIELD
p&J
TT
q
ma
150 175 200
PIPING
TiT
pJ
070 075,080
pJ&-JpJ
Compressor numbers, viewed facing compressor side of unit.
CKT CKT CKT CKT CKT CKT
&j
&g
$J
p-&
CKT
j-?JpJa
q l2Jlml-g
090,100 110,125
TT
m
CKT
b
pJ
q 2pJ
YT
IxJTJmB
2
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