Carrier 19QA User Manual
Refrigerant Management System
Installation, Operating and Maintenance
Instructions
For Use With Low-Pressure Centrifugal Liquid Chillers
SAFETY CONSIDERATIONS
Refrigerant recovery devices are designed to provide safe
and reliable service when operated within design spec
ifications. When operating this equipment, use good judg
ment and safety precautions to avoid damage to equip
ment and property or injury to personnel.
Be sure you understand and follow the procedures and
safety precautions contained in this guide.
A DANGER
DO NOT VENT refrigerant relief valves within a building. Outlet
from rupture disc or relief valve must be vented outdoors in ac
cordance with the latest edition of ASHRAE 15 (Safety Code for
Mechanical Refrigeration). The accumulation of refrigerant in an
enclosed space can displace oxygen and cause asphyxiation.
PROVIDE adequate ventilation in accordance with ASHRAE 15,
especially for enclosed and low overhead spaces. Inhalation of
high concentrations of vapor is harmful and may cause heart ir
regularities, unconsciousness, or death. Misuse can be fatal. Va
por is heavier than air and reduces the amount of oxygen available
for breathing. Product causes eye and skin irritation. Decomposi
tion products are hazardous.
DO NOT USE OXYGEN to purge lines or to pressurize a ma
chine for any purpose. Oxygen gas reacts violently with oil, grease,
and other common substances.
NEVER EXCEED specified test pressures, VERIFY the allow
able test pressure by checking the instruction literature and the de
sign pressures on the equipment nameplate.
DO NOT USE air for leak testing. Use only tracer gases and dry
nitrogen.
DO NOT VALVE OFF any safety device.
BE SURE that all pressure relief devices are properly installed
and functioning before operating any machine.
A WARNING
DO NOT WELD OR FLAMECUT any refrigerant line or vessel
until all refrigerant (liquid and vapor) has been removed from chiller.
Traces of vapor should be displaced with dry air or nitrogen and
the work area should be well ventilated.
with an open flame produces toxic gases.
DO NOT USE eyebolts or eyebolt holes to rig machine sections
or the entire assembly.
DO NOT work on high-voltage equipment unless you are a qual
ified electrician.
DO NOT WORK ON electrical components, including control pan
els, switches, starters, or oil heater until you are sure ALL POWER
IS OFF and no residual voltage can leak from capacitors or solidstate components.
LOCK OPEN AND TAG electrical circuits during servicing. IF
WORK IS INTERRUPTED, confirm that all circuits are de
energized before resuming work.
DO NOT siphon refrigerant by mouth.
AVOID SPILLING liquid refrigerant on skin or getting it into the
eyes. USE SAFETY GOGGLES. Wash any spills from the skin
Refrigerant in contact
with soap and water. If any enters the eyes, IMMEDIATELY FLUSH
EYES with water and consult a physician.
NEVER APPLY an open flame or live steam to a refrigerant cyl
inder. Dangerous overpressure can result. When necessary to heat
refrigerant, use only warm (110 F [43 C]) water,
DO NOT REUSE disposable (nonreturnable) cylinders or
attempt to refill them. It is DANGEROUS AND ILLEGAL. When
cylinder is emptied, evacuate remaining gas pressure, loosen
the collar and unscrew and discard the valve stem. DO NOT
INCINERATE.
CHECK THE REFRIGERANT TYPE before adding refrigerant
to the machine. The introduction of the wrong refrigerant can cause
damage or malfunction to this machine.
Operation of this equipment with refrigerants other than those
cited herein should comply with ASHRAE-15 (latest edition). Con
tact Carrier for further information on use of this machine with
other refrigerants.
DO NOT ATTEMPT TO REMOVE fittings, covers, etc., while
machine is under pressure or while machine is running. Be sure
pressure is at 0 psig (0 kPa) before breaking any refrigerant
connection.
CAREFULLY INSPECT all relief devices, rupture discs, and other
relief devices AT LEAST ONCE A YEAR. If machine operates
in a corrosive atmosphere, inspect the devices at more frequent
intervals.
DO NOT ATTEMPT TO REPAIR OR RECONDITION any re
lief device when corrosion or build-up of foreign material (rust,
dirt, scale, etc.) is found within the valve body or mechanism.
Replace the device.
DO NOT install relief devices in series or backwards.
USE CARE when working near or in line with a compressed spring.
Sudden release of the spring can cause it and objects in its path to
act as projectiles.
A CAUTION
DO NOT STEP on refrigerant lines. Broken lines can whip about
and cause personal injury.
DO NOT climb over a machine. Use platform, catwalk, or stag
ing. Follow safe practices when using ladders.
USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift or
move inspection covers or other heavy components. Even if com
ponents are light, use such equipment when there is a risk of slip
ping or losing your balance.
BE AWARE that certain automatic start arrangements CAN EN
GAGE THE STARTER. Open the disconnect ahead of the starter
in addition to shutting off the machine or pump.
USE only repair or replacement parts that meet the code require
ments of the original equipment.
DOUBLE-CHECK that coupling nut wrenches, dial indicators, or
other items have been removed before rotating any shafts.
DO NOT LOOSEN a packing gland nut before checking that the
nut has a positive thread engagement.
PERIODICALLY INSPECT all valves, fittings, and piping for
corrosion, rust, leaks, or damage.
19QA
50/60 Hz
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book|2 |2 PC 221 Catalog No 531-963 Printed in U S A Form 19QA-2SI Pg 1 9-94 Replaces: 19QA-1 SI
Tab |5a|5d
CONTENTS
Page
SAFETY CONSIDERATIONS
INTRODUCTION
.........................................................
.....................................
INSTALLATION ..........................................................2-7
Complete Pre-Installation Checks............................2
• IDENTIFY UNIT
• INSPECT SHIPMENT
Make Piping Connections
Make Electrical Connections
Optional Caster Installation
CONTROLS AND COMPONENTS
.........................................
....................................
......................................
.............................
7,8
Pump and Motor .........................................................7
Oil Separator...............................................................7
Heater ..........................................................................7
Tube-in-Tube Condenser...........................................7
Level Gage ..................................................................7
Water Separation Sight Glass
Purge Separator Assembly
..................................
.......................................
7
Refrigerant Hoses ......................................................8
Liquid Indicator
..........................................................
8
Filter Drier ...................................................................8
OPERATION .............................................................9-14
Evacuation ..................................................................9
Liquid Refrigerant Transfer.......................................9
• BEFORE TRANSFERRING LIQUID
REFRIGERANT
• TO TRANSFER LIQUID REFRIGERANT
Refrigerant Vapor Transfer
• BEFORE TRANSFERRING REFRIGERANT
VAPOR
• TRANSFER REFRIGERANT
......................................
10
Purge Separator Assembly ......................................12
Oil Separation ............................................................12
Water Separation .......................................................13
MAINTENANCE
Maintaining the Pump
Pump Coupling
High-Pressure Cutout Switches
.........................................................
..............................................
.........................................................
..............................
15
15
15
15
Refrigerant Storage Tank.........................................15
Refrigerant Hoses
.....................................................
15
TROUBLESHOOTING................................................16
Table 1 — Interconnecting Refrigerant Hoses,
Valves, and Fittings
NUMBER
1
2
2
2
2
1
2
1 KA73PS012
1 19QA020-152 Liquid Indicator
8
1 19QA015-142
NOTE: Refer to Fig. 1 for model number description and accessory
caster package part numbers.
PART NUMBER PART
KA73PS003 3 ft (.91 m) Hose
KA73PS006 6 ft (1.88 m) Hose
12 ft (3.66 m) hose
19QA020-132 Valve and Coupler
Chiller Vapor Valve
INSTALLATION
Complete Pre-Installation Checks
IDENTIFY UNIT — Identify the model number and serial
number printed on the nameplate. Check this information
against the job requirements.
7
INSPECT SHIPMENT — Inspect unit for damage before
removing unit from shipping conveyance. If unit appears
damaged, it should be inspected by a shipping inspector be
fore removal. File claim with shipping company if ship
ment is damaged or incomplete. The manufacturer is not
responsible for damage incurred during transit.
Check all components. Notify the supplier immediately
if any item is missing. To prevent loss or damage, leave all
parts in their original package until they are needed.
Make Piping Connections — All connections be
tween the pump, tube-in-tube condenser, storage tank, and
chiller can be made using the factory supplied refrigerant
hoses. A hand valve with coupler is factory supplied, but
must be field installed at each end of the 4 hoses. See
Fig. 5. Field supplied copper tubing and valve manifolds
must be used if a permanent installation is required.
The 19QA is factory equipped with a dual relief valve
assembly. See Fig. 4. The outlet of the valves is 1-1/2 in.
MPT. Vent the dual relief assembly outdoors in accordance
with ASHRAE 15 (Safety Code for Mechanical Refrigera
tion), latest edition, and all applicable local codes. Use a
minimum 1-1/2 in. pipe for the relief valve outlet. Provide
fittings so vent piping can be disconnected periodically for
inspection and testing of valves.
Cover the outdoor vent with a rain cap and place a field
supplied condensate drain at the low point in vent piping to
prevent water build up on the atmospheric side of the valve.
INTRODUCTION
The 19QA Refrigerant Management System (RMS) has
been designed to help owners and operators of centrifugal
chillers conserve low pressure refrigerants and prevent the
release of excessive amounts of refrigerant into the atmo
sphere. The proper use of this equipment will minimize the
loss of CFCs and HCFCs. The 19QA will also recycle re
frigerant contaminated with water, oil, or acid. See Fig. 1
and Table 1 for component information.
The 19QA is ARI (Air Conditioning & Refrigeration In
stitute) certified as a refrigerant recovery/recycling device
and is registered with ETL (Electrical Testing Laboratory)
for safety. The Refrigerant Management System’s storage
tanks are rated for 20, 30, or 40 cu ft (.57, .85, 1.13 cu
meters). See Table 2. Casters are available as an option on
all storage tanks. See Fig. 1-3. See Fig. 4 and 5 for addi
tional RMS component descriptions and dimensions.
Make Electrical Connections — The 19QA has 2
electrical cords. See Table 3 and Fig. 6. One electrical cord
is attached to the pump and the other is attached to the stor
age tank heater. If both electrical cords are used at the same
time, separate outlets are required. Connect electrical power
in accordance with minimum circuit amps (MCA) and max
imum overcurrent protection amps (MOCP) as specified on
the unit nameplate. Be sure that the unit is connected and
grounded in accordance with all applicable electrical codes.
Optional Caster Installation — if optional casters
have been provided, bolt the 4 caster assemblies to the stor
age tank. See Fig. 1-3. Size 020 and 030 storage tanks have
2 rigid casters mounted on one end of the tank and 2 swivel
casters with brakes mounted on the other end of the storage
tank. The size 040 storage tanks have 2 swivel casters with
brakes mounted on one end of the storage tank and 2 swivel
casters with locks mounted on the other end of the storage
tank.
Table 2 — Physical Data
19QA
DRY WEIGHT OF RMS
DRY WEIGHT OF RST
TANK SIZE
TANK STORAGE CAPACITY
CFC-11 Liquid
DESIGN PRESSURE
MAX. OPERATING PRESSURE
CONNECTION SIZES
HIGH-PRESSURE SWITCHES
Tank Heater and Pump
Cutout
Manual Reset
PUMP
Motor Hp
Max. Discharge Pressure
Min. Vacuum (Gage)
Flow Rate
60 Hz
50 Hz
RMS — Refrigerant Management System
RST — Refrigerant Storage Tank
ENGLISH
Size
lb 740
lb
cu ft 20 30 40
lb 1600 2450 3300
psig 15 kPa 103
psig 10 kPa 69
in. Va Flare in.
psig
psig
psig
in. Hg 29 kPa -98
cfm
020 030
841 942
495 546 586
10
<4
%
10 kPa
10.5
8.8
040
Size
kg
kg
CU m .57
kg
kPa
kPa
L/s
SI
020 030
336
225 248 266
727 1114
382
.85 1.13
У2 Flare
69
<28
%
69
4.96
4.16
040
428
1500
19QA - 020 - 2 74
19QA
Size
020 — 20 cu ft (.57 cu meters)
030 — 30 cu ft (.85 cu meters)
040 — 40 cu ft (1.13 cu meters)
- Refrigerant
Management
System
NOTE: Accessory caster packages are avaiiabie for use with the
19QA. Refer to the following table for specific part numbers.
ACCESSORY CASTER
PACKAGE PART NUMBER
19QA 020 213 020
19QA 030 213
19QA 040 213
RMS — Refrigerant Management System
RST — Refrigerant Storage Tank
Fig. 1 — Model Number Description
74 — Refrigerant Management
System
84 — Refrigerant Storage Tank
V-Ph-Hz
2 — 115-1-50/60
3 — 230-1-50/60
RMS/RST SIZE
030
040
UNIT
SIZE
19QA020
19QA030
19QA040
A B
4'-9"
[1448]
7'-3"
[2209]
Q'-Q"
[2972]
5'-4%''
[1648]
7'-10%"
[2410]
10'-4%"
[3172]
NOTE: Dimensions in [ ] are in mm.
Fig. 2 — 19QA Refrigerant Management System Dimensions
WEIGHT
EMPTY
MAXIMUM REFRIGERANT
lbs kg lbs
740 336 1600
841 382 2450
942 428 3300
CHARGE
ACCESSORY
CASTERS
kg
727 34 15
1114 48
1500
lbs kg
62 28
22
PRESSURE GAGE
VAPOR
VALVE
UNIT
SIZE
19QA020
19QA030
19QA040
A
4'-9"
[1448]
7'-3"
[2209]
Q'.Q"
[2972]
B
5'-4%"
[1648]
7'-10%”
[2410]
10'-4%"
[3172]
NOTE: Dimensions in [ ] are in mm.
WEIGHT
EMPTY
lbs
495 225 1600 727
546 248 2450 1114
586 266
MAXIMUM REFRIGERANT
kg
lbs kg
3300 1500 62
CHARGE
RELIEF
-VALVE
ASSEMBLY
■ LEVEL GAGE
ACCESSORY
CASTERS
lbs
34 15
48 22
kg
28
Fig. 3 — 19QA Refrigerant Storage Tank Dimensions
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