Carrier 50HS018 Dimensions and installation guide

Installation, Start-Up and
Service Instructions
CONTENTS Page
SAFETY CONSIDERATIONS .................1-6
General ......................................1
RECEIVING AND INSTALLATION ............7-17
Step 1 — Check Equipment ...................7
• IDENTIFY UNIT
• INSPECT SHIPMENT
Step 2 — Provide Unit Support ...............7
• ROOF CURB
• SLAB MOUNT
Step 3 — Provide Clearances .................7
Step 4 — Rig and Place Unit ..................8
• UNITS WITHOUT BASE RAILS
• UNITS WITH OPTIONAL BASE RAILS
Step 5 — Select and Install Ductwork ........10
• CONVERTING HORIZONTAL DISCHARGE
UNITS TO DOWNFLOW (VERTICAL)
DISCHARGE
• ACCESSORY DUCT FLANGE KIT
INSTALLATION
Step 6 — Provide for Condensate Disposal ...14
Step 7 — Install Electrical Connections ......14
• HIGH-VOLTAGE CONNECTIONS
• ROUTING POWER LEADS INTO UNIT
• CONNECTING GROUND LEAD TO
GROUND LUG
• ROUTING CONTROL POWER WIRES (24 v)
• SPECIAL PROCEDURES FOR 208-V
OPERATION
PRE-START-UP .............................17
START-UP ................................18-27
Check for Refrigerant Leaks .................18
Unit Start-Up Adjustments ...................18
MAINTENANCE ............................28-31
Air Filter ....................................28
Unit Top Removal ...........................28
Indoor Blower and Motor ....................28
Outdoor Coil, Indoor Coil, and Condensate
Drain Pan .................................29
Outdoor Fan ................................29
Electrical Controls and Wiring ...............29
Refrigerant Circuit ..........................29
Indoor Airflow ..............................30
Metering Devices ...........................30
Liquid Line Strainers ........................30
START-UP CHECKLIST .....................CL-1
NOTE TO INSTALLER — Before the installation, READ
THESE INSTRUCTIONS CAREFULLY AND COM-
PLETELY. Also, make sure the Owner’s Manual and Serv-
ice Instructions are left with the unit after installation.
SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment
can be hazardous due to system pressure and electrical com-
ponents. Only trained and qualified personnel should install,
repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance func-
tions of cleaning coils and filters.All other operations should
be performed by trained service personnel. When working
on air-conditioning equipment, observe precautions in the
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves.
Use quenching cloth for unbrazing operations. Have fire ex-
tinguisher available for all brazing operations.
Before performing service or maintenance operations on
system, turn off main power to unit. Turn off accessory
heater power switch if applicable. Electrical shock can
cause personal injury.
General — 50HS heat pumps are fully self-contained and
designed for outdoor installation. See Fig. 1. As shown in
Fig. 2-5, all units are shipped in a horizontal-discharge con-
figuration for installation on a ground-level slab. All units
can be converted to downflow (vertical) discharge configu-
rations for rooftop applications. See Fig. 6 for roof curb
dimensions.
Fig. 1 — Model 50HS
50HS018-060
Single-Package Heat Pump Units
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 5a 5a PC 111 Catalog No. 565-041 Printed in U.S.A. Form 50HS-9SI Pg 1 2-97 Replaces: 50HS-8SI

UNIT ELECTRICAL
CHARACTERISTICS UNIT WT CORNER WT (Lb/Kg) UNIT HEIGHT (in./mm) DIMENSION (in./mm)
LbKgABCD E F
50HS018 208/230-1-60 233 106 66/30 45/20 95/43 42/19 24.1/613 18.2/462
50HS024 208/230-1-60 256 117 68/31 46/21 97/44 45/20 24.1/613 18.2/462
50HS030 208/230-1-60, 208/230-3-60 268 122 66/30 58/26 91/41 53/24 24.1/613 18.2/462
50HS036 208/230-1-60, 208/230-3-60, 460-3-60 288 131 71/32 63/29 96/44 58/26 28.1/714 22.2/563
50HS042 208/230-1-60, 208/230-3-60, 460-3-60 295 134 73/33 65/30 97/44 60/27 28.1/714 22.2/563
UNIT CENTER OF GRAVITY (in./mm)
XYZ
50HS018 20.7/525 19.2/487 10.6/270
50HS024 20.4/517 19.3/491 10.6/270
50HS030 20.3/515 20.1/510 10.6/270
50HS036 20.1/511 20.2/513 12.4/314
50HS042 20.0/509 20.3/516 12.4/314
REQ’D CLEARANCES FOR SERVICING — in. (mm)
Indoor Coil Access Side .................30(762)
Control Box Access Side ................30(762)
(Except for NEC requirements)
Unit Top .........................36(914)
Side Opposite Ducts ..................30(762)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L — in. (mm)
Unit Top .............................0
Duct Side of Unit ........................0
Side Opposite Ducts ......................0
Bottom of Unit .........................0
Vertical Discharge, First 12 in. (305) of Supply Duct . . . 1 (25)
NEC REQ’D CLEARANCES — in. (mm)
Between Units, Control Box Side ...........42(1067)
Unit and Ungrounded Surfaces, Control Box Side . . . .36 (914)
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Control Box Side ........42(1067)
LEGEND
CG — Center of Gravity
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
NOTE: Clearances must be maintained to prevent recirculation of
air from outdoor-fan discharge.
Fig. 2 — Dimensions; Sizes 018-042; Without Base Rail
2

UNIT ELECTRICAL
CHARACTERISTICS UNIT WT CORNER WT (Lb/Kg) UNIT HEIGHT (in./mm) DIMENSION (in./mm)
Lb Kg A B C D E F
50HS018 208/230-1-60 268 122 70/32 50/23 100/45 48/22 27.43/697 21.50/546
50HS024 208/230-1-60 276 125 73/33 51/23 102/46 50/23 27.43/697 21.50/546
50HS030 208/230-1-60, 208/230-3-60 288 131 71/32 63/29 96/44 58/26 27.43/697 21.50/546
50HS036 208/230-1-60, 208/230-3-60, 460-3-60 308 140 76/35 68/31 101/46 63/29 31.43/798 25.50/648
50HS042 208/230-1-60, 208/230-3-60, 460-3-60 315 143 78/35 70/32 102/46 65/30 31.43/798 25.50/648
UNIT CENTER OF GRAVITY (in./mm)
XYZ
50HS018 20.4/518 19.4/493 12.9/329
50HS024 20.2/513 19.5/495 12.9/329
50HS030 20.1/511 20.2/513 12.9/329
50HS036 20.0/508 20.3/515 14.7/373
50HS042 19.9/506 20.4/518 14.7/373
REQ’D CLEARANCES FOR SERVICING — in. (mm)
Indoor Coil Access Side .................30(762)
Control Box Access Side ................30(762)
(Except for NEC requirements)
Unit Top .........................36(914)
Side Opposite Ducts ..................30(762)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L — in. (mm)
Unit Top .............................0
Duct Side of Unit ........................0
Side Opposite Ducts ......................0
Bottom of Unit .........................0
Vertical Discharge, First 12 in. (305) of Supply Duct . . . 1 (25)
NEC REQ’D CLEARANCES — in. (mm)
Between Units, Control Box Side ...........42(1067)
Unit and Ungrounded Surfaces, Control Box Side . . . .36 (914)
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Control Box Side ........42(1067)
LEGEND
CG — Center of Gravity
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
NOTE: Clearances must be maintained to prevent recirculation of
air from outdoor-fan discharge.
Fig. 3 — Dimensions; Sizes 018-042; With Optional Base Rail
3

UNIT ELECTRICAL
CHARACTERISTICS UNIT WT CORNER WT (Lb/Kg)
Lb Kg A B C D
50HS048 208/230-1-60, 208/230-3-60, 460-3-60 359 163 89/40 81/37 113/51 76/35
50HS060 208/230-1-60, 208/230-3-60, 460-3-60 373 170 92/42 85/39 116/53 80/36
UNIT CENTER OF GRAVITY (in./mm)
XYZ
50HS048 19.7/500 20.5/522 15.0/381
50HS060 19.7/499 20.6/523 15.0/381
REQ’D CLEARANCES FOR SERVICING — in. (mm)
Indoor Coil Access Side .................30(762)
Control Box Access Side ................30(762)
(Except for NEC requirements)
Unit Top .........................36(914)
Side Opposite Ducts ..................30(762)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L — in. (mm)
Unit Top .............................0
Duct Side of Unit ........................0
Side Opposite Ducts ......................0
Bottom of Unit .........................0
Vertical Discharge, First 12 in. (305) of Supply Duct . . . 1 (25)
NEC REQ’D CLEARANCES — in. (mm)
Between Units, Control Box Side ...........42(1067)
Unit and Ungrounded Surfaces, Control Box Side . . . .36 (914)
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Control Box Side ........42(1067)
LEGEND
CG — Center of Gravity
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
NOTE: Clearances must be maintained to prevent
recirculation of air from outdoor-fan discharge.
Fig. 4 — Dimensions; Sizes 048,060; Without Base Rail
4

UNIT ELECTRICAL
CHARACTERISTICS UNIT WT CORNER WT (Lb/Kg)
Lb Kg A B C D
50HS048 208/230-1-60, 208/230-3-60, 460-3-60 379 172 94/43 86/39 118/54 81/37
50HS060 208/230-1-60, 208/230-3-60, 460-3-60 393 179 97/44 90/41 121/55 85/39
UNIT CENTER OF GRAVITY (in./mm)
XYZ
50HS048 19.6/498 20.6/524 17.3/440
50HS060 19.6/497 20.6/524 17.3/440
REQ’D CLEARANCES FOR SERVICING — in. (mm)
Indoor Coil Access Side .................30(762)
Control Box Access Side ................30(762)
(Except for NEC requirements)
Unit Top .........................36(914)
Side Opposite Ducts ..................30(762)
REQ’D CLEARANCES TO COMBUSTIBLE MAT’L — in. (mm)
Unit Top .............................0
Duct Side of Unit ........................0
Side Opposite Ducts ......................0
Bottom of Unit .........................0
Vertical Discharge, First 12 in. (305) of Supply Duct . . . 1 (25)
NEC REQ’D CLEARANCES — in. (mm)
Between Units, Control Box Side ...........42(1067)
Unit and Ungrounded Surfaces, Control Box Side . . . .36 (914)
Unit and Block or Concrete Walls and Other
Grounded Surfaces, Control Box Side ........42(1067)
LEGEND
CG — Center of Gravity
MAT’L — Material
NEC — National Electrical Code
REQ’D — Required
Fig. 5 — Dimensions; Sizes 048,060; With Optional Base Rail
NOTE: Clearances must be maintained to prevent
recirculation of air from outdoor-fan discharge.
5

PART NUMBER ‘‘A’’
Flat CPRFCURB001A00 89[203] CPRFCURB002A00 119[279]
CPRFCURB003A00 149[356]
NOTES:
1. Roof curb must be set up for unit being installed.
2. Seal strip must be applied as required for unit being installed.
3. Dimensions in [ ] are in millimeters.
4. Roof curb is made of 16 gage steel.
5. Attach ductwork to curb (flanges of duct rest on curb).
6. Service clearance 4 ft on each side.
7. Direction of airflow.
8. Insulated panels: 1-in. thick fiberglass, 1-lb density.
Fig. 6 — Roof Curb Dimensions
6

RECEIVING AND INSTALLATION
Step 1 — Check Equipment
IDENTIFYUNIT — The unit model number and serial num-
ber are stamped on the unit identification plate. Check this
information against shipping papers.
INSPECT SHIPMENT— Inspect for shipping damage while
unit is still on shipping pallet. If unit appears to be damaged
or is torn loose from its anchorage, have it examined by trans-
portation inspectors before removal. Forward claim papers
directly to transportation company. Manufacturer is not re-
sponsible for any damage incurred in transit.
Check all items against shipping list. Immediately notify
the nearest Carrier Air Conditioning office if any item is
missing.
To prevent loss or damage, leave all parts in original pack-
ages until installation.
Step 2 — Provide Unit Support
ROOF CURB — Install accessory roof curb in accordance
with instructions shipped with curb. See Fig. 6. Install in-
sulation, cant strips, roofing, and flashing. Ductwork must
be attached to curb.
IMPORTANT: The gasketing of the unit to the roof
curb is critical for a watertight seal. Install gasketing
material supplied with the roof curb. Improperly ap-
plied gasketing also can result in air leaks and poor
unit performance.
Curb should be level to within
1
⁄ 4 inch. This is necessary
for unit drain to function properly. Refer to accessory roof
curb installation instructions for additional information as
required.
SLAB MOUNT — Place the unit on a solid, level concrete
pad that is a minimum of 4 in. thick with 2 in. above grade.
The slab should extend approximately 2 in. beyond the cas-
ing on all 4 sides of the unit. Install a 6-in. gravel apron in
front of outdoor coil air inlet to prevent obstruction of air-
flow by grass or shrubs. Do not secure the unit to the slab
except when required by local codes. In areas where pro-
longed subfreezing temperatures or snowfall occur, increase
clearance to 12 to 18 in. by constructing an angle-iron frame
to support unit. See Fig. 7 for recommended frame construc-
tion. Alternate construction should follow dimensions pro-
vided in Fig. 7.
Step 3 — Provide Clearances — The required mini-
mum service clearances and clearances to combustibles are
shown in Fig. 2-5.Adequate ventilation and outdoor air must
be provided.
The outdoor fan pushes air through the outdoor coil and
discharges it through louvers on the top cover, the decora-
tive grille, and the compressor access panel. Be sure that the
fan discharge does not recirculate to the outdoor coil. Do not
locate the unit in either a corner or under an overhead ob-
struction. The minimum clearance under a partial overhang
(such as a normal house overhang) is 48 in. above the unit
top. The maximum horizontal extension of a partial over-
hang must not exceed 48 inches.
Do not restrict outdoor airflow. An air restriction at ei-
ther the outdoor-air inlet or the fan discharge can be det-
rimental to compressor life.
Do not place the unit where water, ice, or snow from an
overhang or roof will damage or flood the unit. Do not in-
stall the unit on carpeting, tile, or other combustible mate-
rials. The unit may be installed on wood flooring or on Class
A, B, or C roof covering materials.
Fig. 7 — Heat Pump Mounting Frame
NOTES:
1. Material consists of angle iron — 31.8 mm (1
1
⁄ 4 in.) to 38 mm (1
1
⁄ 2 in.)
commercial standard.
2 Weld frame together.
3. Paint with zinc-rich paint (rustproof).
7

Step 4 — Rig and Place Unit — Use spreader bars
or crate top when rigging the unit. The units must be rigged
for lifting as shown in Fig. 8 and 9. Refer to Fig. 8 and 9 and
Table 1 for rigging weights. See Fig. 2-5 for operating weights.
Use extreme caution to prevent damage when moving the
unit. Unit must remain in an upright position during all rig-
ging and moving operations. The unit must be level for proper
condensate drainage; the ground-level pad or accessory roof
curb must be level before setting the unit in place. When a
field-fabricated support is used, be sure that the support is
level and that it properly supports the unit.
UNITS WITHOUTBASE RAILS —Accessory rigging brack-
ets are recommended to be used for rigging.
Secure screws and paint protectors solidly against unit
basepan to hold lifting brackets in position.
Never use lifting brackets when the temperature is
below −10 F.
Never exceed 200 lbs per bracket of lifting force.
Never use lifting brackets for lifting other models of air
conditioning units.
Lifting point should be directly over the unit center of
gravity.
Install accessory rigging brackets as follows:
1. Position brackets as close to the corners of unit as pos-
sible. Be sure brackets are well outside of center of grav-
ity. (See Fig. 2, 4, and 8.)
2. Position paint protectors and foam strips between screws
and painted surface of unit. Tighten screws until they make
contact with the paint protectors.
3. Secure device or hook of sufficient strength to hole in bracket
as shown in detail ‘‘A’’ of Fig. 8.
4. If wood top is available, use it for a spreader bar to pre-
vent straps from damaging unit. If wood top is not avail-
able, use spreader bars of sufficient length.
UNITS WITH OPTIONAL BASE RAILS — Keep unit up-
right and do not drop. Use spreader bars or top crate when
rigging unit. Rollers may be used to move unit across roof.
The unit must be level for proper condensate disposal. Rig
unit as shown in Fig. 9. See Fig. 3 and 5 for additional in-
formation. Lifting holes are provided in base rails as shown
in Fig. 9. Refer to rigging instructions on unit.
NOTICE TO RIGGERS
Hook rigging shackles through holes in lifting brackets, as shown in
detail ‘‘A.’’ Lifting brackets to be centered around the unit center of
gravity. Use wood top skid when rigging, to prevent rigging straps
from damaging unit.
All panels MUST be in place when rigging.
UNIT
50HS
SIZE
SHIPPING
WEIGHT ABC
Lb Kg in. mm in. mm in. mm
018 300 136 36.8 934 17.3 439 24.1 613
024 308 140 36.8 934 16.1 409 24.1 613
030 320 145 36.8 934 16.1 411 24.1 613
036 340 154 36.8 934 16.3 415 28.1 714
042 347 157 36.8 934 16.5 417 28.1 714
048 411 186 36.8 934 16.8 426 34.1 867
060 425 193 36.8 934 16.8 427 34.1 867
Fig. 8 — Suggested Rigging for Units Without Base Rail
8

Table 1 — Physical Data
UNIT 50HS 018 024 030 036 042 048 060
REFRIGERANT R-22
Refrigerant Control* Acutrol™ System
SHIPPING WEIGHT (lb)
Without Base Rails 300 308 320 340 347 411 425
With Optional Base Rails 287 295 307 327 334 398 412
COMPRESSOR TYPE Reciprocating Reciprocating Reciprocating Reciprocating Reciprocating Scroll Scroll
INDOOR FAN Centrifugal — Direct Drive
Speeds 2333222
Rpm (High Speed) 825 1025 1025 1100 1100 1100 1100
Diameter (in.) 10 10 10 10 10 10 10
Width (in.) 999991010
Nominal Airflow (Cfm) 675 800 1000 1300 1400 1600 1995
Motor Hp
1
⁄ 41 ⁄ 41 ⁄ 41 ⁄ 23 ⁄ 43 ⁄ 4 1
INDOOR COIL
Rows...Fins/in. 3...15 3...15 3...15 3...15 3...15 3...15 4...15
Face Area (sq ft) 1.83 2.29 3.06 2.70 3.60 4.50 4.50
OUTDOOR FAN Propeller — Direct Drive
Cfm 1700 1900 1900 1900 1900 2400 2400
Rpm 850 1050 850 1050 1050 1050 1050
Diameter (in.) 18 18 18 18 20 20 20
Motor Hp
1
⁄ 81 ⁄ 41 ⁄ 41 ⁄ 41 ⁄ 41 ⁄ 31 ⁄ 3
OUTDOOR COIL
Rows...Fins/in. 2...17 2...17 2...17 2...17 2...17 2...17 2...17
Face Area (sq ft) 5.7 5.7 5.7 6.7 6.7 8.2 8.2
FILTER SIZE (in.)†
Throwaway 20x20 20x20 20x24 24x24 24x24 24x30 24x30
*Operating charge listed on unit nameplate.
†Recommended field-supplied filters are 1 in. thick.
NOTICE TO RIGGERS
Hook rigging shackles through holes in lifting brackets, as shown in
detail ‘‘A.’’ Lifting brackets to be centered around the unit center of
gravity. Use wood top skid when rigging, to prevent rigging straps
from damaging unit. Remove 4 screws to slide wood support through
rectangular hole in rail.
All panels must be in place when rigging.
UNIT
50HS
SIZE
SHIPPING
WEIGHT ABC
Lb Kg in. mm in. mm in. mm
018 287 130
36.5 926
16.1 408 28.2 715
024 295 134 16.3 413 28.2 715
030 307 139 16.3 415 28.2 715
036 327 148 16.5 418 32.2 817
042 334 151 16.5 420 32.2 817
048 398 180 16.9 428 38.2 969
060 412 187 16.9 429 38.2 969
Fig. 9 — Suggested Rigging for Units With Optional Base Rail
9

Step 5 — Select and Install Ductwork — The de-
sign and installation of the duct system must be in accor-
dance with the standards of the NFPA(National Fire Protec-
tion Association) for installation of nonresidence-type air
conditioning and ventilating systems, NFPA90Aor residence-
type, NFPA90B; and/or local codes and residence-type, NFPA
90B; and/or local codes and ordinances.
Select and size ductwork, supply-air registers and
return-air grilles according to ASHRAE (American Society
of Heating, Refrigeration, and Air Conditioning Engineers)
recommendations.
The unit has duct flanges on the supply- and return-air
openings on the side of the unit. See Fig. 2-5 for connection
sizes and locations.
When designing and installing ductwork, consider the
following:
When connecting ductwork to units, do not drill deeper
than
1
⁄ 2 inch in shaded area in Fig. 10 or coil may be
damaged.
• All units should have field-supplied filters or accessory fil-
ter rack installed in the return-air side of the unit. Rec-
ommended sizes for filters are shown in Table 1.
• Avoid abrupt duct size increases and reductions. Abrupt
change in duct size adversely affects air performance.
IMPORTANT: Use flexible connectors between
ductwork and unit to prevent transmission of vibra-
tion. Use suitable gaskets to ensure weathertight and
airtight seal. When electric heat is installed, use fire-
proof canvas (or similar heat resistant material) con-
nector between ductwork and unit discharge connec-
tion. If flexible duct is used, insert a sheet metal sleeve
inside duct. Heat resistant duct connector (or sheet metal
sleeve) must extend 24-in. from electric heater
element.
• Size ductwork for cooling air quantity (cfm). The mini-
mum air quantity for proper electric heater operation is
listed in Table 2. Heater limit switches may trip at air quan-
tities below those recommended.
• Insulate and weatherproof all external ductwork. Insulate
and cover with a vapor barrier all ductwork passing through
conditioned spaces. Follow latest Sheet Metal andAir Con-
ditioning Contractors NationalAssociation (SMACNA) and
Air Conditioning Contractors Association (ACCA) mini-
mum installation standards for residential heating and air
conditioning systems.
• Secure all ducts to building structure. Flash, weather-
proof, and vibration-isolate duct openings in wall or roof
according to good construction practices.
Figure 11 shows a typical duct system with 50HS
installed.
Table 2 — Minimum Airflow for
Safe Electric Heater Operation
SIZE 018 024 030 036 042 048 060
CFM 700 700 875 1200 1225 1400 1750
NOTE: Do not drill more than
1
⁄ 2 -in. deep into shaded area.
Fig. 10 — Area Not To Be Drilled
Power Wiring
Control Wiring
Outdoor Airflow
Indoor Airflow
*Separate disconnect per NEC
(NationalElectricCode)required
for electric heater when single-
point connection is not used.
Fig. 11 — Typical Installation
10