Specifications | Carrier 19XB Oxygen Equipment User Manual

19XB
Positive Pressure Storage System
50/60 Hz
Installation, Operating, and Maintenance
Instructions
For Use With Positive Pressure Chillers
SAFETY CONSIDERATIONS
Positive pressure storage systems are designed to provide safe and reliable service when operated within design specifications. When operating this equipment, use
good judgment and safety precautions to avoid damage
to equipment and property or injury to personnel.
Be sure you understand and follow the procedures and
safety precautions contained in this guide.
DO NOT VENT refrigerant relief valves within a building. Outlet
from rupture disc or relief valve must be vented outdoors in accordance with the latest edition of ASHRAE 15 (American Society
of Heating, Refrigeration, and Air Conditioning Engineers). 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 irregularities, unconsciousness, or death. Misuse can be fatal. Vapor is heavier
than air and reduces the amount of oxygen available for breathing.
Product causes eye and skin irritation. Decomposition products are
hazardous.
DO NOT USE OXYGEN to purge lines or to pressurize a machine
for any purpose. Oxygen gas reacts violently with oil, grease, and
other common substances.
NEVER EXCEED specified test pressures, VERIFY the allowable
test pressure by checking the instruction literature and the design
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.
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. Refrigerant in contact 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 qualified electrician.
DO NOT WORK ON electrical components, including control panels, 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 deenergized before resuming work.
DO NOT syphon refrigerant by mouth.
AVOID SPILLING liquid refrigerant on skin or getting it into the
eyes. USE SAFETY GOGGLES. Wash any spills from the skin
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 cylinder. 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 transferring 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). Contact 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 relief
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.
DO NOT STEP on refrigerant lines. Broken lines can whip about
and cause personal injury and damage to the machine.
DO NOT climb over a machine. Use platform, catwalk, or staging.
Follow safe practices when using ladders.
USE MECHANICAL EQUIPMENT (crane, hoist, etc.) to lift or
move inspection covers or other heavy components. Even if components are light, use such equipment when there is a risk of slipping or losing your balance.
BE AWARE that certain automatic start arrangements CAN ENGAGE 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 requirements 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.
DO NOT MIX REFRIGERANT from chillers that use different compressor oils. Compressor damage can result.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
PC 211
Catalog No. 531-927
Printed in U.S.A.
Form 19XB-1SI
Pg 1
6-96
Replaces: New
Tab 5a
CONTENTS
INTRODUCTION
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Complete Pre-Installation Checks . . . . . . . . . . . . . 2
• IDENTIFY UNIT
• INSPECT SHIPMENT
Mount the Pumpout Unit . . . . . . . . . . . . . . . . . . . . . 3
• MOUNTING ON THE CHILLER
• FLOOR MOUNTING
Rig the Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . 3
Make Piping Connections . . . . . . . . . . . . . . . . . . . . 7
• INSTALL VENT PIPING TO RELIEF DEVICES
Make Electrical Connections . . . . . . . . . . . . . . . . . . 7
CONTROLS AND COMPONENTS . . . . . . . . . . . . . . 11
Pumpout Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
• CONTROLS
• SAFETY CONTROL SETTINGS
• COMPRESSOR
• CONDENSER
• OIL SEPARATOR
• SUCTION AND DISCHARGE VALVES
Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
• DRAIN VALVE
• DUAL RELIEF VALVES
• PRESSURE GAGE
• LEVEL GAGE
OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-15
Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
• REFRIGERANT TRANSFER
• TRANSFERRING LIQUID REFRIGERANT FROM
THE CHILLER COOLER TO THE CHILLER
CONDENSER OR PUMPOUT STORAGE TANK
• TRANSFERRING LIQUID REFRIGERANT FROM
THE CHILLER CONDENSER OR PUMPOUT
STORAGE TANK TO THE CHILLER COOLER
• DISTILLING THE REFRIGERANT
Pumpout and Refrigerant Transfer
Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
• OPERATING THE PUMPOUT UNIT
• TO READ REFRIGERANT PRESSURES
• POSITIVE PRESSURE CHILLERS WITH STORAGE
TANKS
• CHILLERS WITH ISOLATION VALVES
• DISTILLING THE REFRIGERANT
MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15,16
Pumpout Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
• PUMPOUT COMPRESSOR OIL CHARGE
Storage Tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Ordering Replacement Parts . . . . . . . . . . . . . . . . . 16
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 16
The 19XB Positive Pressure Storage (PPS) System has
been designed to help owners and operators of positive pressure chillers store refrigerants HCFC-22 and HFC-134a during service and repair work. The 19XB system conserves
these refrigerants and prevents the release of excessive amounts
of refrigerant into the atmosphere. The proper use of this
equipment minimizes the loss of HFCs and HCFCs.
The 19XB PPS system shown in Fig. 1 consists of a pumpout unit mounted on a storage tank. The pumpout unit is offered as a free-standing unit that can be used with chillers
that have an existing storage tank or with chillers that have
isolation valves that permit built-in refrigerant storage.
The 19XB PPS systems are factory tested and certified to
the American Society of Mechanical Engineers (ASME) pressure vessel code. The tanks are constructed of certified steel
and are pressure rated at 300 psig (2068 kPa). The PPS storage tank is equipped with dual relief valves for proper venting per ASHRAE 15 (American Society of Heating Refrigeration, and Air Conditioning Engineers) guidelines. An
automatic level switch is prewired to the control circuit to
ensure proper storage levels.
The 19EA pumpout unit is a complete, hermetic, compact
unit that consists of:
• a spring-mounted reciprocating compressor with a directdrive motor
• a water-cooled refrigerant condenser
• an oil separator
• suction and discharge valves to control refrigerant flow
• prewired safety and control devices.
When referencing refrigerant charges in this manual, the
HCFC-22 charge will be listed first and the HFC-134a value
will follow in brackets.
INSTALLATION
Complete Pre-Installation Checks
IDENTIFY UNIT — Identify the assembly number
(Table 1) printed on the pumpout unit and storage tank nameplates. Check this information against the job requirements.
Fig. 1 shows the PPS system and its major components.
Refer to Tables 2 and 3 for physical data.
INSPECT SHIPMENT — Inspect unit for damage before
removing unit from shipping conveyance. If unit appears damaged, it should be inspected by a shipping inspector before
removal. File a claim with the shipping company if shipment 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.
2
Table 1 — Positive Pressure System Assembly Numbers
POSITIVE PRESSURE
SYSTEM ASSEMBLY
NUMBER
19XB04280205
19XB04280206
19XB04280207
19XB04280208
19XB04280213
19XB04280214
19XB04280215
19XB04280216
19XB04280601
19XB04280602
19XB04280603
19XB04280604
19XB04280605
19XB04280606
19XB04280607
19XB04280608
19XB04520205
19XB04520206
19XB04520207
19XB04520208
19XB04520213
19XB04520214
19XB04520215
19XB04520216
PUMPOUT UNIT
ASSEMBLY NO.
REFRIGERANT
COMPRESSOR MOTOR
(V-Ph-Hz)
MAXIMUM
RLA
LRA
STORAGE
TANK
19EA42-748
19EA44-748
19EA46-748
19EA47-748
19EA48-748
19EA49-748
19EA51-748
19EA52-748
19EA42-748
19EA44-748
19EA46-748
19EA47-748
19EA48-658
19EA49-658
19EA51-658
19EA52-658
19EA42-748
19EA44-748
19EA46-748
19EA47-748
19EA48-748
19EA49-748
19EA51-748
19EA52-748
R-22
R-22
R-22
R-22
R-134a
R-134a
R-134a
R-134a
R-22
R-22
R-22
R-22
R-134a
R-134a
R-134a
R-134a
R-22
R-22
R-22
R-22
R-134a
R-134a
R-134a
R-134a
208-3-60
230-3-60
400/460-3-50/60
575-3-60
208-3-60
230-3-60
400/460-3-50/60
575-3-60
208-3-60
230-3-60
400/460-3-50/60
575-3-60
208-3-60
230-3-60
400/460-3-50/60
575-3-60
208-3-60
230-3-60
400/460-3-50/60
575-3-60
208-3-60
230-3-60
400/460-3-50/60
575-3-60
13.2
11.5
5.8
4.6
13.2
11.5
5.8
4.6
13.2
11.5
5.8
4.6
13.2
11.5
5.8
4.6
13.2
11.5
5.8
4.6
13.2
11.5
5.8
4.6
63.5
57.5
28.8
23.0
63.5
57.5
28.8
23.0
63.5
57.5
28.8
23.0
63.5
57.5
28.8
23.0
63.5
57.5
28.8
23.0
63.5
57.5
28.8
23.0
28 cu ft
28 cu ft
28 cu ft
28 cu ft
28 cu ft
28 cu ft
28 cu ft
28 cu ft
None
None
None
None
None
None
None
None
52 cu ft
52 cu ft
52 cu ft
52 cu ft
52 cu ft
52 cu ft
52 cu ft
52 cu ft
LEGEND
LRA — Locked Rotor Amps
RLA — Rated Load Amps
NOTES:
1. All storage vessels are 300 psig (2068 kPa) designs per the ASME
(American Society of Mechanical Engineers) Boiler Pressure
Vessel Code, Section VIII Division 1.
2. All units above are shipped with a 15 psig (103 kPa) nitrogen charge.
3. Nominal horsepower for all pumpout units is 3.0.
Mount the Pumpout Unit — The pumpout unit, if purchased separately, may be mounted directly on the chiller or
it may be floor mounted.
MOUNTING ON THE CHILLER — See instructions provided with the chiller for mounting the pumpout unit. A typical chiller mount is shown in Fig. 2.
FLOOR MOUNTING — Select a ventilated and accessible
area, free of traffic or other hazards. Remove and discard the
4 angle supports at the base of the pumpout unit and bolt the
unit to the floor through the 47⁄16 in. holes at the base of the
pumpout unit. Special isolation is unnecessary. Contact surface and dimensions for the pumpout unit are given in
Fig. 3.
Rig the Storage Tank — The complete 19XB system
can be rigged as a single assembly. See the rigging instructions on the label attached to the assembly. Also refer to the
rigging guide (Fig. 4), physical data in Tables 2 and 3, and
contact surface and dimensions for the complete system in
Fig. 5. Lift the assembly only from the 4 points indicated in
the rigging guide. Each rigging cable must be capable of
supporting the entire weight of the assembly.
Lifting the assembly from points other than those specified may result in serious damage to the assembly and
personal injury. Rigging equipment and procedures must
be adequate for assembly. See Tables 2 and 3 for weights.
NOTE: These weights are broken down into pumpout
unit and storage tank weights. For the complete assembly weight, add all components together.
3
VENT VALVE
VALVES
CONTROL BOX
(WIRING BY
CONTRACTOR)
VALVES
COMPRESSOR
CONDENSER
WATER
CONNECTIONS
(FIELD PIPING)
REFRIGERANT
INLET VALVE
19EA PUMPOUT UNIT
19EA CONTROL BOX (INTERIOR)
19EA PUMPOUT UNITS
Fig. 1 — 19XB Positive Pressure Storage System
4
*3⁄8-16 bolts × 1-in. lg; 4 required.
Fig. 2 — 19EA Pumpout Unit: Typical Chiller Mount
ELECTRICAL CONNECTION
OPTION LIST
TRADE SIZE
1⁄2(
3⁄4(
1(
11⁄4(
QTY
1
1
1
1
LOCATION
TOP
BOTTOM
MIDDLE
MIDDLE
Fig. 3 — Pumpout Unit Contact Surfaces and Dimensions
5
NOTES:
1. Each chain must be capable of supporting the entire weight of the
machine.
2. Minimum chain length:
28 ft3 tank — 108-09
52 ft3 tank — 158-69
3. Total weight equals empty weight from chart and charge weight
given on label.
STORAGE
TANK SIZE
28 Ft3
52 Ft3
CENTER OF GRAVITY
APPROX. DIM. — ft-in. (mm)
A
B
4- 51⁄4
1-77⁄8
(1353)
(505)
6-101⁄8
1-83⁄4
(2086)
(527)
EMPTY WEIGHT
LB (Kg)
2380
(1080)
3460
(1569)
Fig. 4 — Rigging Guide
Table 2 — Physical Data
19EA Pumpout Unit
Pumpout Unit Weight*
Pumpout Condenser Water Flow Rate
Pumpout Condenser Water Pressure Drop
Maximum Entering Condenser Water Temperature
Maximum Leaving Condenser Water Temperature
Condenser Relief Valve (Fusible Plug)
Condenser Pressure Rating
Refrigerant Side
Waterside
Compressor Rating 1750 rpm (29 r/s) Reciprocating
Valves (4-Valve Manifold, Copper with
Brass Turn Knob Valves)
lb (kg)
gpm (L/s)
psig (kPa)
F (C)
F (C)
psig (kPa)
ENGLISH
210
5 to 7
6 to 10.7
85
100
385
(SI)
(95)
(.32 to .44)
(41.4 to 73.8)
(29)
(37)
(2655)
385
150
8.7
(2655)
(1034)
(.25)
⁄
12
psig (kPa)
psig (kPa)
cfm (L/s)
in. OD
*The pumpout unit weight includes the compressor/condenser, control box, and the oil separator.
NOTES:
1. The motor is hermetic with thermal protection.
2. The control box is mounted and wired with a fuse on/off switch according to NEMA 1 (National
Electrical Manufacturing Association).
3. The starter contactor is located in the control box. The overloads on the motor are wired and the
disconnect switch is supplied by the customer.
4. The condenser tube is copper.
6
12
⁄
Table 3 — 19XB Storage Tank Rated Dry Weight and Refrigerant Capacity
English
SIZE CODE
TANK OD
(in.)
DRY WEIGHT*
(lb)
0428
0452
24.00
27.25
2380
3460
MAXIMUM REFRIGERANT CAPACITY (lb)
ASHRAE/ANSI 15
UL 1963
R-22
R-134a
R-22
R-134a
1842
1860
1704
1716
3527
3563
3264
3286
SI
SIZE CODE
TANK OD
(mm)
DRY WEIGHT*
(kg)
0428
0452
610
592
1080
1569
MAXIMUM REFRIGERANT CAPACITY (kg)
ASHRAE/ANSI 15
UL 1963
R-22
R-134a
R-22
R-134a
836
844
773
778
1600
1616
1481
1491
LEGEND
ANSI
— American National Standards Institute
ASHRAE — American Society of Heating, Refrigeration,
and Air Conditioning Engineers
UL
— Underwriters’ Laboratories
*The above dry weight includes the pumpout unit weight of 210 lbs (95 kg).
1. If relief devices are manifolded, the cross-sectional area
of the relief pipe must at least equal the sum of the areas
required for individual relief pipes.
2. Provide a pipe plug near outlet side of each relief device
for leak testing. Provide pipe fittings that allow vent piping to be disconnected periodically for inspection of valve
mechanism.
3. Piping to relief devices must not apply stress to the device. Adequately support piping. A length of flexible tubing or piping near the device is essential on springisolated machines.
4. Cover the outdoor vent with a rain cap and place a condensation drain at the low point in the vent piping to prevent water build-up on the atmospheric side of the relief
device.
Make Piping Connections — Figure 6 represents typical pumpout unit/chiller piping connections. Standard connections for 1⁄2-in. OD copper tubing are provided. Install
the field-supplied FPT tee with pipe plug in the piping as
shown in Fig. 6. This tee is used for refrigerant charging.
NOTE: If any field piping runs exceed 50 ft in length, use
7⁄8-in. OD copper tubing to minimize pressure drop.
Pumpout unit water piping connections are shown in
Fig. 6. Both connections are 1⁄2-in. NPT (female). A shutoff
valve should be installed in the water line. Provide a means
for blowing water from the condenser coil at winter shutdown to prevent freeze-up damage. Refer to the Job Data for
water piping particulars.
INSTALL VENT PIPING TO RELIEF DEVICES — The
pumpout storage tank is factory-equipped with relief devices. Refer to Fig. 5 and Table 2 for size and location of the
relief devices. Vent the relief devices to the outdoors in accordance with ANSI/ASHRAE 15 Safety Code (latest edition) for Mechanical Refrigeration and all other applicable
codes. Relief devices are set to relieve at 300 psig
(2068 kPa).
Make Electrical Connections — See nameplate on
compressor of pumpout unit and Table 1 for motor electrical
data. Wire unit according to the diagram inside the control
box.
Fig. 7 is the wiring schematic for a complete system that
includes the 19XB storage tank and the pumpout unit.
Fig. 8 is the wiring schematic for the pumpout unit. Use this
schematic for installations that do not include an auxiliary
pumpout storage tank.
NOTE: Use copper conductors only.
Refrigerant discharged into confined spaces can displace oxygen and cause asphyxiation.
7
DIMENSIONS
ENGLISH (ft-in.)
TANK
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
SIZE
0428 10- 5
9-10
4-9
2-43⁄4 1-23⁄8 3-13⁄16 4-11
3-81⁄8 3- 8
2-97⁄16 3-2
0-31⁄2 4-83⁄4 1-77⁄8 1-75⁄16 3-73⁄4 5-01⁄4
0452 14-111⁄4 14- 41⁄2 5-07⁄8 2-81⁄2 1-41⁄4 3-47⁄16 7- 21⁄4 4-0
3-117⁄8 3-15⁄16 3-57⁄8 0-33⁄8 7-11⁄2 1-83⁄4 1-79⁄16 3-8
5-01⁄2
SI (mm)
TANK
SIZE
0428
0452
A
B
C
D
E
F
G
H
J
K
L
M
N
P
R
S
T
3175
4553
2997
4382
1448
1546
730
826
365
413
945
1027
1499
2191
1121
1219
1118
1216
849
948
965
1064
89
86
1442
2172
505
528
491
497
1111
1118
1530
1537
NOTES:
1.
Denotes center of gravity.
2. Dimensions in ( ) are in millimeters.
3. The weights and center of gravity values given are for an empty storage
tank.
4. For additional information on the pumpout unit, see certified drawings.
5. The available conduit knockout sizes are:
TRADE
SIZE
1⁄2(
3⁄4(
1(
11⁄4(
QTY
LOCATION
1
1
1
1
top
bottom
middle
middle
Fig. 5 — PPS Contact Surface and Dimensions
8
CHILLERS WITHOUT ISOLATION VALVES
CHILLERS WITH ISOLATION VALVES
(WITH OR WITHOUT PUMPOUT STORAGE TANKS)
LEGEND
GENERAL PIPING CONNECTION SIZES
CONNECTION
Refrigerant Transfer Connections
Condenser Water Cooling Connectors
Safety Relief Head Pumpdown Condenser
Factory-Supplied Tubing
Field-Supplied Tubing
Field-Supplied Tubing (Multiple Chillers)
SIZE (in.)
⁄ ODS (female)
1⁄2 NPT (female)
3⁄8 Flare (male)
12
Service Valve (Factory Supplied)
Service Valve (Field Supplied)
ODS — Outside Diameter, Sweat
NOTES:
1. The field-supplied tubing is to be 1⁄2-in. OD tubing (min.) and must
be arranged and supported to avoid stresses on the equipment,
transmission of vibrations, and interference with routine access
during the reading, adjusting, and servicing of the equipment. If
the distance from the chiller to the pumpout unit is over 50 ft, then
7⁄8-in. OD tubing (min.) must be used. Provisions should be made
for adjustment in each plane of the tubing and for both periodic
and major servicing of the equipment. Special care must be taken
so that the safety head does not experience tubing strain. Vent
the safety head per ASHRAE 15 (American Society of Heating,
Refrigeration, and Air Conditioning Engineers), latest revision.
2. The tubing and valve from the storage tank to the pumpout compressor is factory supplied when the unit is factory mounted.
Fig. 6 — Typical Pumpout Unit/Chiller Connection Schematic
9
Table 4 — Relief Devices
STORAGE
TANK SIZE
28
52
RELIEF VALVE
OUTLET SIZE
QUANTITY
1 in. NPT
Female Connector
1 in. NPT
Female Connector
REQUIRED FACTOR
lb air
Kg air
min
min
2
31.4
14.2
2
52.3
23.7
LEGEND
Ground
Field Wiring
Factory Wiring
Contactor Term.
Overload Term.
Pumpdown Term.
Pumpdown Comp’r.
Term.
Fig. 7 — 19XB Pumpout System Wiring Schematic
LEGEND
C
Fu
HP
L
LL
OL
T’stat
—
—
—
—
—
—
—
Contactor
Fuse, 3 Amps
High-Pressure Cutout
Compressor Motor Voltage Line (3-phase)
Low-Line Control Voltage (single-phase)
Compressor Overload
Internal Thermostat
Compressor Terminal
Contactor Terminal
Overload Terminal
Pumpout Unit Terminal
*Bimetal thermal protector imbedded in motor winding.
Fig. 8 — Pumpout Unit Wiring Schematic
10
LEVEL GAGE — Liquid level gage (magnetically coupled
dial type) with electronic shut-off at 90% liquid capacity.
CONTROLS AND COMPONENTS
Figure 1 shows the major components of the PPS system.
Pumpout Unit — The pumpout unit consists of a springmounted direct motor-driven reciprocating compressor, a watercooled refrigerant condenser, an oil separator, suction and
discharge valves to control refrigerant flow, and prewired safety
and control devices. The pumpout unit comes equipped with
a 4-way transfer valve manifold to interconnect both liquid
and vapor transfer and to pressurize the chiller during transfer of refrigerant from chiller to storage tank.
CONTROLS — The pumpout unit has the following controls: an on/off switch, a 3-amp fuse, compressor overloads,
an internal thermostat, a compressor contactor, and a refrigerant high pressure cutout.
SAFETY CONTROL SETTINGS — The pumpout unit highpressure switch (Fig. 1) is set to open at the settings listed
in Table 5. The switch setting is checked by operating the
pumpout condenser and slowly throttling the pumpout condenser water.
During transfer of refrigerant into and out of the pumpout storage tank, carefully monitor the storage tank level
gage. Do not fill the tank more than 90% of capacity to
allow for refrigerant expansion. Overfilling may result
in damage to the tank and personal injury. For maximum refrigerant capacity, refer to Table 2.
OPERATION
Overview — Transferring refrigerant from one vessel to
another is accomplished by using either gravity or pressure
differential. A difference in elevation between 2 vessels results in a gravity flow of liquid; a difference in pressure forces
the liquid from one vessel to the other. The latter method
requires lowering the pressure in one vessel. If there is liquid in that vessel, its temperature must be lowered, and the
pressure in the other vessel must be simultaneously
increased.
Under most circumstances, creating the pressure differential is not a difficult process. Some applications, such as
ice storage, outdoor installations, or installations with high
temperature differentials between the storage tank and the
chiller may require additional consideration. In some instances, it may be necessary to add auxiliary heat to one of
the vessels or to insulate the storage tank at job sites where
high ambient temperature or sun load make it difficult to reduce the temperature and pressure in the tank. Outdoor installations must have a roof or cover over the storage tank to
ensure that the pressure in the tank does not exceed the chiller
relief pressure setting.
REFRIGERANT TRANSFER — When refrigerant is being
evacuated from the chiller cooler or condenser vessels, any
liquid refrigerant left in a vessel will flash off, lowering the
temperature in that vessel enough to freeze the fluid (usually
water) flowing through the cooler or condenser tubes. This
event, called tube freeze-up, can cause extensive damage to
the chiller; therefore, all liquid refrigerant must be removed
from a vessel before evacuation of refrigerant vapor is started.
If all the liquid cannot be removed, then the cooler water
and condenser water pumps must be operated throughout the
process of evacuating refrigerant vapor to keep fluid moving
through the cooler and condenser tubes.
TRANSFERRING LIQUID REFRIGERANT FROM THE
CHILLER COOLER TO THE CHILLER CONDENSER OR
PUMPOUT STORAGE TANK — Chiller and pumpout unit
valves are set to permit the pumpout compressor to discharge refrigerant vapor into the cooler vessel, lowering pressure in the condenser vessel/storage tank. The pressure differential forces liquid from the cooler vessel into the condenser
vessel/storage tank. After all the liquid is transferred, the refrigerant vapor remaining in the cooler vessel can be drawn
off by reducing pressure in the chiller and discharging the
vapor through the pumpout unit condenser into the condenser vessel/storage tank.
TRANSFERRING LIQUID REFRIGERANT FROM THE
CHILLER CONDENSER OR PUMPOUT STORAGE TANK
TO THE CHILLER COOLER — Chiller and pumpout unit
valves are set to increase pressure in the chiller condenser
vessel/storage tank and to reduce pressure in the cooler vessel. Pressure in the cooler vessel is lowered to correspond to
a saturated refrigerant liquid temperature 2 F (1.1 C) above
the freezing temperature of the liquid circulating through the
chiller cooler/condenser tubes (34 F [1.1 C] for water). The
valves are set so that the pressure in the cooler vessel is lower
than that of the condenser vessel/storage tank, forcing the
liquid into the cooler vessel.
Table 5 — High Condition Pressure Switch Settings
English
REFRIGERANT
R-134a
R-22
HIGH-PRESSURE SWITCH
Cutout
CutIn
+0
161 ± 5 psig
130 − 5 psig
+0
220 ± 5 psig
185 − 5 psig
SI
REFRIGERANT
R-134a
R-22
HIGH-PRESSURE SWITCH
Cutout
Cut-In
+0
1110 ± 34 kPa
896 − 34 kPa
+0
1517 ± 34 kPa
1276 − 34 kPa
NOTES:
1. R-22 units use high-pressure cutout switch HK01UA181.
2. R-134a units use high-pressure cutout switch HK01UA187.
COMPRESSOR — The pumpout compressor assembly has
a positive displacement of 1750 rpm (29 r/s) and 8.7 cfm
(0.004 m3/s). It comes equipped with thermal protection on
the motor and an in-line oil separator.
CONDENSER — The water-cooled condenser is fully ASME
constructed. During transfer, it condenses refrigerant vapor
to liquid. The condenser transfer tank safety relief valves comply with ASHRAE 15 standards.
OIL SEPARATOR — The pumpout unit includes an in-line
oil separator to remove oil that becomes mixed with refrigerant and returns the oil to the compressor.
SUCTION AND DISCHARGE VALVES — The pumpout
unit comes with a 4-way transfer valve manifold to interconnect both liquid and vapor transfer and to pressurize the
chiller during transfer of refrigerant from chiller to storage
tank or from one chiller vessel to another.
Storage Tank — The storage tank is rated for positive
pressure refrigerants under ASME Section VIII pressure vessel codes with a minimum of 300 psig (2068 kPa) rating.
The tank components include:
DRAIN VALVE — Located at its lowest point of drain with
a minimum of 1 in. NPT.
DUAL RELIEF VALVES — Two relief valves and a 3-way
shut-off valve.
PRESSURE GAGE — A 30 in.-0-400 psig (101-0-2760 kPa)
compound pressure gage.
11
NOTE: During this operation, maintain water circulation
through the chiller cooler and condenser vessels to prevent
tube freeze-up.
DISTILLING THE REFRIGERANT — Refrigerant vapor
is transferred from the chiller cooler vessel or pumpout storage tank through the pumpout condenser, condensed to a liquid, and pumped to the chiller condenser vessel. During this
operation, water circulation must be maintained in the pumpout condenser. Refrigerant impurities left in the chiller cooler
vessel or storage tank are then drained off. This operation
can take from 4 to 14 hours, depending on the type and amount
of refrigerant being distilled.
The Pumpout and Refrigerant Transfer Procedures section gives step-by-step instructions on performing these
operations.
VENT VALVE 8
OIL RETURN
LINE
CONNECTION
PUMPOUT
CONTROL BOX
(WIRING BY
CONTRACTOR)
Pumpout and Refrigerant Transfer Procedures
— Three possibilities are available:
1. If there are no isolation valves on the chiller, a complete
pumpout system with a pumpout storage tank and pumpout unit is needed.
2. Whether or not isolation valves are available on the chiller,
the refrigerant can be pumped to and isolated in a pumpout storage tank by using the pumpout unit.
3. If isolation valves are available on the chiller, the refrigerant can be pumped to either the cooler vessel or the
condenser vessel using the pumpout unit.
The following procedures describe how to transfer refrigerant from one vessel to another and how to evacuate the
chiller.
CONDENSER
WATER
CONNECTIONS
REFRIGERANT
INLET VALVE
Fig. 9 — Pumpout Unit
2. Attach a 30 in.-0-400 psi (101-0-2760 kPa) gage to the
storage tank to determine its pressure.
POSITIVE PRESSURE CHILLERS WITH STORAGE
TANKS — In the Valve/Condition tables that accompany
these instructions, the letter 9C9 indicates a closed valve.
Figures 9 and 10 show the locations of the valves.
Always run chiller cooler and condenser water pumps
and always charge or transfer refrigerant as a gas when
chiller vessel pressure is less than 60 psig (414 kPa)
[30 psig (207 kPa)]. Below these pressures, liquid refrigerant flashes into gas, resulting in extremely low temperatures in the cooler/condenser tubes and possibly causing
tube freeze-up.
Do not mix refrigerants from chillers that use different
compressor oils. Compressor damage can result. For example, the compressor oil in a 23XL chiller that uses
HCFC-22 refrigerant can cause severe lubrication problems in a 19XL chiller that uses HCFC-22 refrigerant.
OPERATING THE PUMPOUT UNIT
1. Be sure that the suction and the discharge service valves
on the pumpout compressor (Fig. 9) are open (backseated) during operation. Rotate the valve stem fully counterclockwise to open. Frontseating the valve closes the
refrigerant line and opens the gage port to compressor
pressure.
2. Make sure that the pumpout compressor holddown bolts
(Fig. 2) have been loosened to allow free spring travel.
Transfer Refrigerant from Pumpout Storage Tank to Chiller:
During transfer of refrigerant into and out of the 19XB
storage tank, carefully monitor the storage tank level gage.
Do not fill the tank more than 90% of capacity to allow
for refrigerant expansion. Overfilling may result in damage to the tank and personal injury.
1. Equalize refrigerant pressure.
a. Turn on chiller water pumps and monitor chiller
pressures.
b. Close pumpout and storage tank valves 2, 4, 5, 8, and
10, and close refrigerant charging valve 7; open chiller
isolation valve 11 and any other chiller isolation valves,
if present.
c. Open pumpout and storage tank valves 3 and 6; open
chiller valves 1a and 1b.
Transfer, addition, or removal of refrigerant in springisolated chillers may place severe stress on external piping if springs on the chiller have not been blocked in
both up and down directions.
3. Open the refrigerant inlet valve (Fig. 9) on the pumpout
compressor.
4. Oil should be visible in the pumpout compressor sight
glass under all operating conditions and during shutdown. If oil is low, add oil as described in the Maintenance section.
TO READ REFRIGERANT PRESSURES — During pumpout or leak testing:
1. Refer to the display on the chiller control center to determine refrigerant-side pressures and low (soft) vacuum.
Use a quality vacuum indicator or manometer to measure
evacuation and dehydration and to ensure the desired range
and accuracy.
VALVE
CONDITION
1a
1b
2
C
3
4
C
5
C
6
7
C
8
C
10
C
11
d. Gradually crack open valve 5 to increase chiller pressure to 60 psig (414 kPa), [ 30 psig (207 kPa)]. Slowly
feed refrigerant to prevent freeze-up.
12
Fig. 10 — Valve Locations for 19XB Pumpout Unit With 19XB Storage Tank
k. Close valves 1a, 1b, 2, 5, and 6.
e. Open valve 5 fully after the chiller pressure rises above
the freezing point of the refrigerant. Let the storage
tank and chiller pressure equalize. Open refrigerant charging valve 7 and storage tank charging valve 10 to let
liquid refrigerant drain into the chiller.
VALVE
CONDITION
1a
1b
2
C
3
4
C
5
6
7
8
C
10
VALVE
CONDITION
1a
1b
2
C
3
4
5
C
6
7
8
C
1a
1b
2
3
C
4
C
5
6
7
C
8
C
2
C
3
C
4
C
5
C
6
C
7
C
8
C
10
C
11
l. Turn off pumpout condenser water.
Transfer the Refrigerant from Chiller to Pumpout Storage
Tank.
10
1. Equalize refrigerant pressure.
a. Valve positions:
11
VALVE
CONDITION
b. Turn off the pumpout condenser water, and turn on the
pumpout compressor to push liquid refrigerant out of
the storage tank. Monitor the storage tank level until
the tank is empty.
c. Close refrigerant charging valves 7 and 10.
d. Turn off the pumpout compressor.
e. Turn off the chiller water pumps.
f. Close valves 3 and 4.
g. Open valves 2 and 5.
VALVE
CONDITION
1b
C
11
2. Transfer remaining refrigerant.
a. Close valve 5 and open valve 4.
VALVE
CONDITION
1a
C
10
C
1a
1b
2
C
3
4
C
5
C
6
7
C
8
C
10
C
11
b. Slowly open valve 5 and refrigerant charging valves 7
and 10 to allow liquid refrigerant to drain by gravity
into the storage tank.
VALVE
CONDITION
1a
1b
2
C
3
4
C
5
6
7
8
C
10
11
2. Transfer the remaining liquid.
a. Turn off pumpout condenser water. Place valves in the
following positions:
11
VALVE
CONDITION
h. Turn on pumpout condenser water.
i. Run the pumpout compressor until the storage tank pressure reaches 5 psig (34 kPa), 18 in. Hg (41 kPa
absolute).
j. Turn off the pumpout compressor.
1a
1b
2
3
C
4
C
5
6
7
8
C
10
11
b. Run the pumpout compressor for approximately 30 minutes, then close valve 7 and 10.
VALVE
CONDITION
1a
1b
2
3
C
4
C
5
6
c. Turn off the pumpout compressor.
13
7
C
8
C
10
C
11
Transfer All Refrigerant to Chiller Condenser Vessel:
1. Push refrigerant into chiller condenser vessel.
a. Turn on the chiller water pumps and monitor the chiller
pressure.
b. Valve positions:
3. Remove any remaining refrigerant.
a. Turn on chiller water pumps.
b. Turn on pumpout condenser water.
c. Place valves in the following positions:
VALVE
CONDITION
1a
1b
2
C
3
4
5
C
6
7
C
8
C
10
C
11
VALVE
CONDITION
d. Run the pumpout compressor until the chiller pressure reaches 60 psig (414 kPa), [30 psig (207 kPa)];
then, shut off the pumpout compressor. Warm chiller
condenser water will boil off any entrapped liquid refrigerant and chiller pressure will rise.
e. When chiller pressure rises to 70 psig (483 kPa),
[40 psig (276 kPa)]; turn on the pumpout compressor
until the pressure again reaches 60 psig (414 kPa)
[30 psig (207 kPa)]; then, turn off the pumpout compressor. Repeat this process until the chiller pressure
no longer rises; then, turn on the pumpout compressor
and pump out until the chiller pressure reaches
18 in. Hg (41 kPa absolute).
f. Close valves 1a, 1b, 3, 4, and 6.
VALVE
CONDITION
1a
C
1b
C
2
C
3
C
4
C
5
C
6
C
7
C
8
C
10
C
1a
1b
2
3
C
4
C
5
8
C
11
c. Equalize the refrigerant in the chiller cooler and
condenser.
d. Turn off chiller water pumps and pumpout condenser
water supply.
e. Turn on pumpout compressor to push liquid out of the
chiller cooler vessel.
f. When all liquid has been pushed into the chiller condenser vessel, close the cooler refrigerant isolation valve
(11).
g. Turn on the chiller water pumps.
h. Turn off the pumpout compressor.
2. Evacuate gas from chiller cooler vessel.
a. Close pumpout valves 2 and 5; open valves 3 and 4.
11
VALVE
CONDITION
g. Turn off the pumpout condenser water.
4. Establish vacuum for service. To conserve refrigerant, operate the pumpout compressor as described in Step 3e until the chiller pressure is reduced to 18 in. Hg (41 kPa
absolute).
CHILLERS WITH ISOLATION VALVES — The valves referred to in the following instructions are shown in Fig. 9
and 11. Valve 7 remains closed.
1a
1b
2
C
3
4
5
C
8
C
11
C
b. Turn on pumpout condenser water.
c. Run pumpout compressor until the chiller cooler vessel pressure reaches 18 in. Hg vac (41 kPa absolute).
Monitor pressures on the chiller control panel and on
refrigerant gages.
Fig. 11 — Valve Locations for 19XB Pumpout Unit Without Storage Tank
14
6. Open valve 5 fully.
d. Close valve 1a.
e. Turn off pumpout compressor.
f. Close valves 1b, 3, and 4.
VALVE
CONDITION
1a
C
1b
C
2
C
3
C
VALVE
CONDITION
4
C
5
C
8
C
11
C
VALVE
CONDITION
Transfer All Refrigerant to Chiller Cooler Vessel:
1. Push refrigerant into the chiller cooler vessel.
a. Turn on the chiller water pumps and monitor the chiller
pressure.
b. Valve positions:
1a
1b
2
3
C
4
C
5
8
C
1a
1b
2
3
C
4
C
5
8
C
11
VALVE
CONDITION
1a
C
1b
C
2
C
3
C
4
C
5
C
8
C
11
C
VALVE
CONDITION
11
C
VALVE
CONDITION
Return Refrigerant to Normal Operating Conditions
1. Be sure that the chiller vessel that was opened has been
evacuated.
2. Turn on chiller water pumps.
3. Open valves 1a, 1b, and 3.
1a
1b
2
C
3
4
C
5
C
8
C
4
C
5
8
C
11
C
1a
C
1b
C
2
C
3
C
4
C
5
C
8
C
11
1a
1b
2
C
3
4
C
5
C
6
7
C
8
C
10
C
11
1a
1b
2
3
C
4
C
5
6
7
C
8
C
10
C
11
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the storage tank
pressure reaches 5 psig (34 kPa), 18 in. Hg (41 kPa
absolute).
e. Turn off the pumpout compressor.
f. Close valves 1a, 1b, 2, 5, and 6.
g. Turn off pumpout condenser water.
h. Turn off pumpout condenser water.
i. Turn off chiller water pumps and lock out chiller compressor.
VALVE
CONDITION
3
d. Gradually crack open valve 5 to increase chiller pressure to 60 psig (414 kPa), [30 psig (207 kPa)]. Slowly
feed refrigerant to prevent freeze-up.
e. Open valve 5 fully after the chiller pressure rises above
the freezing point of the refrigerant. Let the storage
tank and chiller pressure equalize.
3. Transfer remaining refrigerant.
a. Close valve 3.
b. Open valve 2.
c. Turn on pumpout condenser water.
d. Run the pumpout compressor until the chiller condenser reaches 18 in. Hg (41 kPa absolute). Monitor
pressure at the chiller control panel and refrigerant gages.
e. Close valve 1b.
f. Turn off pumpout compressor.
g. Close valves 1a, 2, and 5.
VALVE
CONDITION
2
C
9. Turn off chiller water pumps.
DISTILLING THE REFRIGERANT
1. Transfer the refrigerant from the chiller to the pumpout
storage tank as described in the Transfer the Refrigerant
from Chiller to Pumpout Storage Tank section.
2. Equalize the refrigerant pressure.
a. Turn on chiller water pumps and monitor chiller
pressures.
b. Close pumpout and storage tank valves 2, 4, 5, 8, and
10, and close chiller charging valve 7; open chiller isolation valve 11 and any other chiller isolation valves,
if present.
c. Open pumpout and storage tank valves 3 and 6; open
chiller valves 1a and 1b.
c. Equalize the refrigerant in the chiller cooler and
condenser.
d. Turn off chiller water pumps and pumpout condenser
water.
e. Turn on pumpout compressor to push refrigerant out
of the chiller condenser.
f. When all liquid is out of the chiller condenser, close
valve 11 and any other liquid isolation valves on the
chiller.
g. Turn off the pumpout compressor.
2. Evacuate gas from chiller condenser vessel.
a. Turn on chiller water pumps.
b. Make sure that pumpout valves 3 and 4 are closed and
valves 2 and 5 are open.
VALVE
CONDITION
1b
7. Close valves 1a, 1b, 3, and 5.
8. Open chiller isolation valve 11 and any other isolation
valves, if present.
g. Turn off pumpout condenser water.
h. Turn off chiller water pumps and lock out chiller
compressor.
VALVE
CONDITION
1a
1a
C
1b
C
2
C
3
C
4
C
5
C
6
C
7
C
8
C
10
C
11
4. Drain the contaminants from the bottom of the storage
tank into a container. Dispose of contaminants safely.
MAINTENANCE
Periodic maintenance is necessary to keep all components
functioning as designed. A maintenance log is recommended to ensure a proper maintenance schedule is
followed.
11
C
4. Crack open valve 5, gradually increasing pressure in the
evacuated chiller vessel to 60 psig (414 kPa), [30 psig
(207 kPa)]. Feed refrigerant slowly to prevent tube
freeze-up.
5. Leak test to ensure chiller vessel integrity.
Pumpout Unit — For maintenance details, refer to the
06D, 07D Installation, Start-Up, and Service Instructions.
15
PUMPOUT COMPRESSOR OIL CHARGE — Use oil conforming to Carrier specifications for reciprocating compressor use. Oil requirements are listed in Table 6.
Table 6 — Pumpout Compressor Oil Requirements
REFRIGERANT
ISO
VISCOSITY
R-22
R-134a
86
68
CARRIER
SPECIFICATION
NO.
PP49-7
PP47-31
CARRIER
PART NO.
PP23BZ101
PP23BZ103
The total oil charge, 4.5 pints (2.6 L), consists of 3.5 pints
(2.0 L) for the compressor and one additional pint (0.6 L)
for the oil separator.
Oil should be visible in one of the pumpout compressor
sight glasses both during operation and at shutdown. Always
check the oil level before operating the pumpout compressor. Before adding or changing oil, relieve the refrigerant
pressure as follows:
1. Attach a pressure gage to the gage port of either pumpout
compressor service valve (Fig. 10).
2. Close the suction service valve and open the discharge
line to the pumpout storage tank or the chiller.
3. Operate the compressor until the crankcase pressure drops
to 2 psig (13 kPa).
4. Stop the pumpout compressor and isolate the pumpout
system by closing the discharge service valve.
5. Slowly remove the oil return line connection (Fig. 9). Add
oil as required.
6. Replace the connections and reopen the pumpout compressor service valves.
Storage Tank — To prevent moisture and contaminants from entering the storage tank, maintain positive pressure in the tank when not transferring refrigerant. Leak test
the storage tank according to your normal vessel leak test
procedures and schedule.
Ordering Replacement Parts — The following information must accompany an order for Carrier-specified parts:
• machine model number and serial number
• name, quantity, and part number of the part required
• delivery address and method of shipment
TROUBLESHOOTING
Information on troubleshooting for the PPS is included in
Table 7.
Table 7 — Troubleshooting
SYMPTOM
Compressor does not run
Compressor cycles on
high-pressure control
Unit operates too long
System Noises
Compressor Loses Oil
PROBABLE CAUSE
Main power line open
Loose terminal connection
Improperly wired controls
Low line voltage
Compressor motor defective
Seized compressor
High level gage alarm
High-pressure control erratic in action
Discharge valve partially closed.
Air in system
Condenser scaled.
Condenser water pump or fans not operating.
Isolation valves partially open
Piping vibrations
Compressor noisy
Insufficient compressor oil
Leak in system
Plugged or stuck compressor oil return
check valve
Dirty accumulator
REMEDY
Replace fuse or reset circuit breaker.
Check connections.
Check wiring and rewire.
Check line voltage; determine location of voltage drop.
Check motor winding for open or short. Replace compressor if
necessary.
Replace compressor.
Check refrigerant level and remove excess.
Check capillary tube for pinches. Set control as required..
Open valve.
Purge system.
Clean condenser.
Start pump or fans.
Close valves.
Support piping as required. Check for loose pipe connectors.
Check valve plates for valve noise. Replace compressor (worn
bearings). Check for loose compressor holddown bolts.
Add oil.
Locate and repair leak.
Repair or replace valve.
Clean accumulator.
Copyright 1996 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 2
PC 211
Catalog No. 531-927
Printed in U.S.A.
Form 19XB-1SI
Pg 16
6-96
Replaces: New
Tab 5a
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