Carrier 50ZP036300 User manual

50ZP
10 SEER
Single Packaged Air Conditioner
3-—5 Nominal Tons (Sizes 036—060)
turn to the experts
UNIT SHIPPED DRY, CHARGE WITH R-—22
REFRIGERANT BEFORE START—UP
Installation
NOTE: Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS ........ 0.00.00 ce eee eee 1
General 2... eee eee 2
RECEIVING AND INSTALLATION ...............005 5-9
Check Equipment .. 0.0.0... 00. eee eee 5
Identify Unit 2... ene 5
Inspect Shipment ..... 0.0.0... . eee eee 5
Provide Unit Support .. 2.0.0... eee ee eee 5
Slab Mount 2.00.0... 0. 0c eee 5
Provide Clearances 2.0... 0... eee eee 5
Place Unit 2.0.0... eee ene 5
Select and Install Ductwork... 0... ee 5
Install Flanges for Ductwork Connections (SOZP060 only) . 5
Converting Horizontal Discharge Units to Downflow (Vertical)
Discharge 2.0.0... ee eee eens 6
Charging Unit .. 0.0... 0... ee 6
Provide for Condensate Disposal .. 2.0.0.0... 0.000.000 05 6
Install Electrical Connections ©... 0.0... eee 8
High Voltage Connections .. 0.0.0... 0.0.0 e eevee eee 8
Routing Power Leads into Unit... 0.0.0.0... 0. 0.00000- 8
Connecting Ground Lead to Unit Ground .............. 8
Routing Control Power Wires . 2.0.0.0... 0.000000 ee eee 8
Special Procedures for 208-V Operation ............... 9
PRE-START-UP .. 0.2... eee 9
START-UP... ee 10-11
MAINTENANCE ..... 0.0.00 .0. 000000 eee eee 11-13
TROUBLESHOOTING .............0.0 000000 eee 13
START-UP CHECKLIST ................0. 0.0 .000005 13
NOTE: TO INSTALLER - Before the installation , READ
THESE INSTRUCTIONS CAREFULLY AND COMPLETELY.
Also, make sure the User’s Manual is left with the unit after
installation.
SAFETY CONSIDERATIONS
Improper installation adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product Refer to the individual instructions
packaged with the kits or accessories when installing.
Instructions
2
°
e
L
Mf
MLL
ELE
LLL
a
fe
ML
|
LL
AKI
G
AE
Aa
MMM
AT
AI
AUC
LMM
Mt
\
ss
00001
Fig. 1 - 50ZP (Size 036 Shown)
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have a fire extinguisher available. Read these instructions
thoroughly and follow ail warnings or cautions included in
literature and attached to the unit. Consult local building codes, the
current editions of the National Electrical Code (NEC) NFPA 70.
In Canada refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. This is the safety-alert symbol AY
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury. Understand
these signal words; DANGER, WARNING, and CAUTION. These
words are used with the safety-alert symbol. DANGER identifies
the most serious hazards which will result in severe personal injury
or death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify unsafe
practices which may result in minor personal injury or product and
property damage. NOTE is used to highlight suggestions which
will result in enhanced installation, reliability, or operation.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before installing or servicing system, always turn off main
power to system and install lockout tag. There may be
more than one disconnect switch.

11.57 16.06
[294.0] [408.0]
p=
REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
TOP OF UNIT
DUCT SIDE OF UNIT...
SIDE OPPOSITE DUCTS
BOTTOM OF UNIT
INCHES [mm]
NEC. REQUIRED CLEARANCES.
INCHES [rnm]
BETWEEN UNITS, POWER ENTRY SIDE... ee 42,00 [1066.8]
° UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE......000000... 42,00 [1066.8]
9.75 REQUIRED CLEARANCE FOR OPERATION AND SERVICING
[247.6] . INCHES [m m|
CONDENSER COIL ACCESS SIDE... [
POWER ENTRY SIDE 00 [
ft (EXCEPT FOR NEC REQUIREMENTS)
UNIT TOP 00 [1219.2]
SIDE OPPOSITE DUCTS 0 [762.0]
14.0 DIA. LEGEND
[356.0]
REAR VIEW DUCT OPENINGS
NEC — National Electrical Code
50.98 NOTES:
[1295.0] . Clearances must be maintained to prevent recirculation of air from outdoor
BOTTOM OF UNIT fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm], A
removable fence or barricade requires no clearance,
EVAP, COIL i ¢ 2, Dimensions are in inches. Dimensions in [] are in millimeters.
COND H
COIL
oN
rt m m m
31.99
[812.5]
BOTTOM OF UNIT
<< BLOWER, CONTROL BOX AND EVAP.
ACCESS PANEL
COMPRESSOR PANEL
FIELD ENTRY TO
SERVICE PORTS
COIL
272 21.61
[69.0] [594.0]
1.75 DIA.
[44.5]
17.60
[447.0]
, . h . . i
La. 20
[30.6] 19.61 2.50
LEFT SIDE VIEW FRONT VIEW [498.1] [63.5}
1.0540 1.DB x 50 DEEP
[26.772 x 12.7] RIGHT SIDE VIEW
Co00002
Fig. 2 - Base Unit Dimensions, 50ZP036
UNIT WEIGHT CENTER OF GRAVITY IN. (MM)
UNIT ELECTRICAL CHARACTERISTICS
ib kg X Y Zz
50ZP036 208/230-1-60, 208/230-3-60 234 406 (3:00) (0.00) (0.50)
bo

__ 11.57
[294.0]
Eos
REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
TOP OF UNIT...
DUCT SIDE OF
SIDE OPPOSITE DU:
BOTTOM OF UNIT........
INCHES [mm]
2000
NEC. REQUIRED CLEARANCES.
INCHES [mm]
BETWEEN UNITS, POWER ENTRY SIDE.. 2.00 [1066.8}
UNIT AND UNGROUNDED SURFACES, POWER ENTRY ‘SIDE 38. 00 [914.0]
UNIT AND BLOCK OR CONCRETE WALLS AND OTHE
GROUNDED SURFACES, POWER ENTRY GE 42.00 [1066.8}
REQUIRED CLEARANCE FOR OPERATION AND SERVICING
INCHES [mm]
CONDENSER COIL ACCESS SIDE
POWER ENTRY SIDE
(EXCEPT FOR NEC REQUIREMENT
UNIT TOP
SIDE OPPOSITE DUCT:
30.00 [762.0]
«30.00 [762.0}
48.00 [1219.2]
9.75 0.00 [762.0]
[247.6] LEGEND
J # NEC - National Electrical Code
14.0 DIA. NOTES:
REAR VIEW [356.0] 1. Clearances must be maintained to prevent recirculation of air from outdoor-
DUCT OPENINGS fan discharge, with the exception of the condenser coil (36.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.
2. Dimensions are in inches. Dimensions in [] are in millimeters.
50.98
[1295.0]
BOTTOM OF UNIT
EVAPORATOR
COIL
CONDENSER | b
COIL L
J
TT
||
|
Lota F
||
If 31.99
| i [812.5]
| iy t6 BOTTOM OF UNIT
|
|| ~
lI
e ils
COM
\
BLOWER, CONTROL BOX AND
EVAPORATOR COIL ACCESS PANEL
2.72 21.64
[69.0] [549.0]
0.88 DIA.
[22.2]
\ .
\_1.75 DIA. -
25.60. |
[650.2] [44.5]
, || .
beg / 19.61 2.50
_f [498.1] [63.5]
LEFT SIDE VIEW FRONT VIEW 1.0540 1.D. x .50 DEEP
[26.772 x 12.7] RIGHT SIDE VIEW
C00003
Fig. 3 - Base Unit Dimensions, 50ZP048
UNIT WEIGHT CENTER OF GRAVITY IN. (MM)
UNIT ELECTRICAL CHARACTERISTICS
ib kg X Y Z
50ZP048 208/230-1-60, 208/230-3-60 308 440 (3:00) (0.00) (12.60)

DIMENSIONS IN [] ARE IN mm
13.89
— [352.7] REQUIRED CLEARANCE TO COMBUSTIBLE MATL.
4.63 _. 13.89 e (e211 INCHES [mm]
[117.6]
[352.8]
153.7]
TOP
OF
UNIT
0
DUCT SIDE OF UNIT.. 0
SIDE OPPOSITE DUCTS... 0
BOTTOM OF UNIT 0
P ia = NEC. REQUIRED CLEARANCES.
INCHES [mm]
BETWEEN UNITS, POWER ENTRY SIDE... eee 42,00 [1066.8]
UNIT AND UNGROUNDED SURFACES, POWER ENTRY SIDE .36.00 [914.0]
| UNIT AND BLOCK OR CONCRETE WALLS AND OTHER
GROUNDED SURFACES, POWER ENTRY SIDE... 42.00 [1066.8]
I ce = 3 do REQUIRED CLEARANCE FOR OPERATION AND SERVICING
27-80 INCHES [mm]
: - [708.0] CONDENSER COIL ACCESS SIDE... ...30.00 [762.0]
: POWER ENTRY SIDE »,..30,00 [762.0]
13.88 4 (EXCEPT FOR NEC REQUIREMENTS)
[352.5] 7 4] UNIT TOP 48.00 [1219.2]
i SIDE OPPOSITE DUCTS »,..30.00 [762.0]
i . . |:
5.44 ; a LEGEND
* - i i NEC — National Electrical Code
8.50 NOTES:
88.9 .
REAR VIEW f ] 1. Clearances must be maintained to prevent recirculation of air from outdoor-
fan discharge, with the exception of the condenser coil (86.00 in [914.0 mm]. A
removable fence or barricade requires no clearance.
50.98 2. Dimensions are in inches. Dimensions in [] are in millimeters.
[1295.0]
BOTTOM OF UNIT
31.99
[812.5]
BOTTCK OF UNIT
NN
NS
S
SN,
N
. AND EVAP. COIL
27200 21.61 -
69.0 [549.0]
COMPRESSOR PANEL \
F
5 1.75 DIA. 232) iA.
[44.5] \ ,
\ i
_ a
oN
N/ \
34.13 [*
[867.0] 2960 |
[751.8]
1
1.20
LEFT
SIDE
VIEW
FRONT
VIEW
20S
|
geet
00
[25.4]
1,0540 1.D. x .50 DEEP~
(26.772 x 12.7] RIGHT SIDE VIEW
coo004
Fig. 4 - Base Unit Dimensions, 50ZP060
UNIT WEIGHT CENTER OF GRAVITY IN. (MM)
UNIT ELECTRICAL CHARACTERISTICS
ib kg X Y Z
50ZP060 208/230-1-60, 208/230-3-60 344 156 (3:00) (0.00) (3:00)

4 CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care
and wear appropriate clothing.
These instructions cover minimum requirements and conform to
existing national standards and safety codes. In some instances,
these instructions exceed certain local codes and ordinances,
especially those that may not have kept up with changing
residential construction practices. We require these instructions as a
minimum for a safe installation.
GENERAL — 50ZP cooling units are fully self-contained and
designed for outdoor installation. See Fig. 1. As shown in Fig. 2-4,
units are shipped in a horizontal-discharge configuration for
installation on a ground-level slab. All units can be
field-converted to downflow discharge configurations for rooftop
applications with a field-supplied plenum
RECEIVING AND INSTALLATION
Step 1 — Check Equipment
IDENTIFY UNIT — The unit model number and serial number
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 securing points, have it examined by transportation
inspectors before removal. Forward claim papers directly to
transportation company. Manufacturer is not responsible 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 packages until
installation.
Step 2 — Provide Unit Support
SLAB MOUNT — Place the unit on a rigid, level surface, suitable
to support the unit weight. The flat surface should extend
approximately 2-in. (51 mm) beyond the unit casing on the 2
sides. The duct connection side and condensate drain connection
sides should be flush with the edge of the flat surface. A concrete
pad or a suitable fiberglass mounting pad is recommended.
A 6-in. (152 mm) wide gravel apron should be used around the
flat surface to prevent airflow blockage by grass or shrubs. Do not
secure the unit to the flat surface except where required by local
codes.
The unit should be level to within 1/4 in. (6 mm). This is necessary
for the unit drain to function properly.
Step 3 — Provide Clearances
The required minimum service clearances and clearances to
combustibles are shown in Fig. 2-4. Adequate ventilation and
condenser air must be provided.
The condenser fan pulls air through the condenser coil and
discharges it through the fan on the top cover. Be sure that the fan
discharge does not recirculate to the condenser coil. Do not locate
the unit in either a corner or under an overhead obstruction. The
minimum clearance under a partial overhang (such as a normal
house overhang) is 48 in. (1219 mm) above the unit top. The
maximum horizontal extension of a partial overhang must not
exceed 48 in. (1219 mm).
Do not place the unit where water, ice, or snow from an overhang
or roof will damage or flood the unit. The unit may be installed on
wood flooring or on Class A, B, or C roof covering materials.
Step 4 — Place Unit
Unit can be moved with the handholds provided in the unit
basepan. Refer to Table 1 for operating weights. Use extreme
caution to prevent damage when moving the unit. Unit must
remain in an upright position during all moving operations. The
unit must be level for proper condensate drainage; the
ground-level pad 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.
Step 5 — Select and Install Ductwork
The design and installation of the duct system must be in
accordance with:
* the standards of the NFPA (National Fire Protection Association)
for installation of nonresidence-type air conditioning and
ventilating systems;
¢ NFPA9OA or 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.
Use the duct flanges provided on the supply- and return-air
openings on the side of the unit. See Fig. 2-4 for connection sizes
and locations. The 14-in. (356 mm) round duct collars (size
036-048 units) are shipped inside the unit attached to the indoor
blower. They are field-installed and must be removed from the
indoor cavity prior to start-up, even if they are not used for
installation.
INSTALL FLANGES FOR DUCTWORK CONNECTIONS
(S0ZP060 ONLY) — The 50ZP060 units are shipped with flanges
which must be field-installed on the unit.
To install unit flanges:
1. Five pieces of flange are shipped on the return-air opening
of the unit. Remove the flanges from the shipping position.
See Fig. 5. Screws are field-supplied.
bo . One piece of flange is used as it is shipped (straight). Bend
the other 4 pieces at right angles.
3. Install the straight flange on the right side of the return-air
opening in holes provided. See Fig. 6. Flanges should stick
out from unit to allow for connection of ductwork.
4. Install 2 hand-formed flanges onto return air opening in
holes provided to form a rectangle around the return air
opening.
5. Install remaining 2 hand-formed flanges around discharge
air opening in holes provided.
6. Ductwork can now be attached to flanges.
When designing and installing ductwork, consider the following:
UNIT DAMAGE HAZARD
Failure to follow this caution may result in damage to unit
components.
When connecting ductwork to units, do not drill deeper
than 3/4 in. (19.1 mm) in shaded area shown in Fig. 7 or
coil may be damaged.
e¢ All units should have field-supplied filters installed in the
return-air side of the unit. Recommended sizes for filters are
shown in Table 1.
¢ Avoid abrupt duct size increases and reductions. Abrupt change
in duct size adversely affects air performance. Use flexible
connectors between ductwork and unit to prevent transmission of
vibration. Use suitable gaskets to ensure weathertight and airtight
seal.
5

¢ Size ductwork for cooling air quantity (CFM).
¢ Insulate and weatherproof all external ductwork. Insulate and
cover with a vapor barrier all ductwork passing through
conditioned spaces. Follow latest Sheet Metal and Air
Conditioning Contractors National Association (SMACNA) and
Air Conditioning Contractors Association (ACCA) minimum
installation standards for residential heating and air conditioning
systems.
¢ Secure all ducts to building structure. Flash, weatherproof, and
vibration-isolate duct openings in wall or roof according to good
construction practices.
Fig. 8 shows a typical duct system with 5OZP unit installed.
FIVE PIECES OF DUCT
FLANGE ATTACHED
HERE FOR SHIPMENT
00005
Fig. 5 - Shipping Location of Duct Flanges (Size 060 Only)
00006
Fig. 6 - Flanges Installed on 50ZP060 Units
Converting Horizontal Discharge Units to Downflow
(Vertical) Discharge
CE UA Le:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations on the
system, turn off main power to unit and install lockout tag.
There may be more than one disconnect switch.
Units are dedicated side supply products. They are not convertible
to vertical air supply. A field-supplied plenum must be used to
convert to vertical air discharge.
Step 6 — Charging Unit
Unit is shipped with a nitrogen holding charge only. Slowly release
nitrogen charge from unit using service gages and using a vacuum
pump evacuate unit to 500 microns or lower. To locate charging
ports, remove top panel which provides access to control box and
blower. Charging ports are located under top panel. Charge unit by
weight using an electronic scale. R-22 charge quantity can be
found in table 1 and on unit rating plate. Do not over charge.
Step 7 — Provide for Condensate Disposal
NOTE: Be sure that condensate-water disposal methods comply
with local codes, restrictions, and practices.
Unit removes condensate through a 1-3/64 -in. (26.6 mm) ID hole
which is located at the end of the unit. See Fig. 2-4 for location of
condensate connection.
19.17" 3.92" se)
(486.9 mm) (99.6 mm)
a
nuvi
EY
aN
ay
NY,
Ae
i
SSS
p
i
aN
HAA
CD
C00007
Fig. 7 - Area Not to Be Drilled More Than 3/4-in.
[@[s) THERMOSTAT
"se DISCONNECT
PER NEC*
ie COMPOSITE
pect RUST-PROOF —
col RS BASEPAN ——
~ CONDENSATE
CONNECTION
mmm Power Wiring
Control Wiring
»> Condenser Airflow
: > Evaporator Airflow
*Separate disconnect per NEC
(National Electrical Code)
A10018
Fig. 8 - Typical Installation

Table 1 - Physical Data
UNIT 50ZP 036 048 060
SHIPPING WEIGHT (Ibs) 278 352 388
(kg) 126 160 176
COMPRESSOR TYPE Reciprocating Scroll Reciprocating
REFRIGERANT R22
Charge (Ib) 4.2 5.5 6.9
(kg) 1.9 25 3.4
REFRIGERANT METERING DEVICE Acutrol™ Device Piston
CONDENSER COIL Copper Tubes, Aluminum Plate Fins
Rows...Fins/in. 2.17 2.17 2.17
Face Area (sq ft) 6.2 8.6 10.7
CONDENSER-FAN Propeller Propeller
MOTOR CFM 2000 2600 2800
Nominal Rpm 1100 1100 1100
Motor Hp 1/4 1/4 1/4
Diameter (in.) 20 20 20
(mm) 508 508 508
EVAPORATOR COIL Copper Tubes, Aluminum Plate Fins
Rows...Fins/in. 3...15 3...15 4.15
Face Area (sq ft) 3.1 4.3 49
EVAPORATOR FAN MOTOR Direct Drive
Blower Motor Size (in.) 10x8 10x9 10x10
(mm) 254 x 203 254 x 229 254 x 254
Nominal CFM 1200 1650 1700
Rpm Range 800-1050 1000-1100 950-1100
Number of Speeds 3 2 3
Factory Speed Setting Low Low Low
Motor Hp 1/2 3/4 1
CONNECTING DUCT SIZES Round Square
Supply Air (in.) 14 13.9x 13.9
(mm) 356 353 x 353
Return Air (in.) 14 13.9 x 27.8
(mm) 356 353 x 706
FIELD-SUPPLIED RETURN-AIR FILTERt
Throwaway (in.) 24 x 24 24 x 30
(mm) 610 x 610 610 x 762
tRequired filter sizes shown are based on the AHRI (Air Conditioning, Heating and Refrigeration Institute) rated airflow at a velocity of 300 ft/min for throwaway
type or 450 ft/min for high capacity type. Recommended filters are 1—in. (25 mm) thick.
1” (25 mm) MIN,
V
TRAP
OUTLET Y
2” (51 mm) MIN.
A08001
Condensate Trap (Using Tubing)
\ PN
l-in. 5 mm) min. i
TRAP
OUTLET
<¢—
A
2-in. (51 mm) min.
t
A09052
Condensate Trap (Using PVC Piping)
Fig. 9 - Condensate Trap
HIGH-VOLTAGE ~=LOW-VOLTAGE
POWER WIRING WIRING ENTRY
ENTRY HOLE HOLE
Fig. 10 - Unit Electrical Connection Entry Holes
00010

Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground
level installations. Install a field-supplied condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. (25 mm) lower than the
drain-pan condensate connection to prevent the pan from
overflowing. See Fig. 9. Prime the trap with water. When using a
gravel apron, make sure it slopes away from the unit.
If the installation requires draining the condensate water away from
the unit, install a 2-in. (51 mm) trap using a 3/4 -in. OD tubing or
pipe. See Fig. 9. Make sure that the outlet of the trap is at least 1 in.
(25 mm) lower than the unit drain-pan condensate connection to
prevent the pan from overflowing. Prime the trap with water.
Connect a drain tube using a minimum of 3/4 -in. PVC, 3/4 -in.
CPVC, or 3/4 -in. copper pipe (all field supplied). Do not
undersize the tube. Pitch the drain tube downward at a slope of at
least 1 in. (25 mm) for every 10 ft (3 m) of horizontal run. Be sure
to check the drain tube for leaks. Prime trap at the beginning of the
cooling season start-up. Allowable glues for condensate trap
connection are: Standard ABS, CPVC, or PVC cement.
Step 8 — Install Electrical Connections
4 WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
The unit cabinet must have an uninterrupted, unbroken
electrical ground to minimize the possibility of personal
injury if an electrical fault should occur. This ground may
consist of an electrical wire connected to the unit ground
screw in the control compartment, or conduit approved for
electrical ground when installed in accordance with NEC,
ANSI/NFPA 70 American National Standards Institute/
National Fire Protection Association (latest edition) (in
Canada, Canadian Electrical Code CSA C22.1) and local
electrical codes.
4 CAUTION
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in damage to the
unit being installed.
1. Make all electrical connections in accordance with NEC
ANSI/NFPA 70 (latest edition) and local electrical codes
governing such wiring. In Canada, all electrical
connections must be in accordance with CSA standard
C22.1 Canadian Electrical Code Part 1 and applicable
local codes. Refer to unit wiring diagram.
bo . Use only copper conductor for connections between
field-supplied electrical disconnect switch and unit. DO
NOT USE ALUMINUM WIRE.
3. Be sure that high-voltage power to unit is within
operating voltage range indicated on unit rating plate. On
3-phase units, ensure phases are balanced within 2
percent. Consult local power company for correction of
improper voltage and/or phase imbalance.
4. Do not damage internal components when drilling
through any panel to mount electrical hardware, conduit,
etc.
HIGH-VOLTAGE CONNECTIONS — The unit must have a
separate electrical service with a field-supplied, waterproof
disconnect switch mounted at, or within sight from the unit. Refer
to the unit rating plate for maximum fuse/circuit breaker size and
minimum circuit amps (ampacity) for wire sizing.
The field-supplied disconnect may be mounted on the unit over
the high-voltage inlet hole. See Fig. 2-4.
Operation of unit on improper line voltage constitutes abuse and
may cause unit damage that could affect warranty.
ROUTING POWER LEADS INTO UNIT — Use only copper
wire between disconnect and unit. The high-voltage leads should
be in a conduit until they enter the unit; conduit termination at the
unit must be watertight. Run the high-voltage leads through the
hole on the contro! box side of the unit (see Fig. 10 for location).
When the leads are inside the unit, run leads to the control box
(Fig. 11). For single-phase units, connect leads to the black and
yellow wires; for 3-phase units, connect the leads to the black,
yellow, and blue wires (see Fig. 12).
CONNECTING GROUND LEAD TO UNIT GROUND — Refer
to Fig. 11 and 12. Connect the ground lead to the chassis using the
unit ground lug in the control box.
COMPRESSOR
CONTACTOR
TRANSFORMER
GROUND INDOOR OUTDOOR FAN MOTOR HIGH
LUG FAN AND COMPRESSOR VOLTAGE
RELAY START CAPACITOR LEADS
At10019
Fig. 11 - Control Box Wiring
UNIT GROUND
GROUND
~~ Teap f
SINGLE-PHASE |) 20 dg Ke
3-PHASE CONNECTIONS
CONNECTIONS JTODISCONNECT), _ A YEL-
TO DISCONNECT |PER NEC
PER NEC
L------4 ~ BLu-
C00012
Fig. 12 - Line Power Connections
ROUTING CONTROL POWER WIRES — Form a drip-loop
with the thermostat leads before routing them into the unit. Route
the thermostat leads through grommeted hole provided in unit (see
Fig. 10) into unit control box. Connect thermostat leads to unit
control power leads as shown in Fig. 13.
Route thermostat wires through grommet providing a drip-loop at
the panel. Connect low-voltage leads to the thermostat as shown in
Fig. 13.
The unit transformer supplies 24-v power for complete system.
Transformer is factory wired for 230-v operation. If supply voltage
is 208 v, rewire transformer primary as described in the Special
Procedures for 208-v Operation section below.

YEL—+
OOO0e
‘ [
UNIT CONTROL BOX
THERMOSTAT
AND SUBBASE
c00018
Fig. 13 - Control Connections
SPECIAL PROCEDURES FOR 208-V OPERATION
4 WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations on the
system, turn off main power to unit and install lockout tag.
There may be more than one disconnect switch.
1. Remove wirenut from connection of ORG wire to BLK
wire. Disconnect the ORG transformer-primary lead from
the BLK wire. Save wirenut. See unit wiring label.
bo . Remove the wirenut from the terminal on the end of the
RED transformer-primary lead.
3. Save the wirenut.
4. Connect the RED lead to the BLK wire from which the
ORG lead was disconnected. Insulate with wirenut from
Step 1.
5. Using the wirenut removed from the RED lead, insulate the
loose terminal on the ORG lead.
6. Wrap the wirenuts with electrical tape so that the metal
terminals cannot be seen.
Indoor blower-motor speeds may need to be changed for 208-v
operation. Refer to Indoor Airflow and Airflow Adjustments
section.
PRE-START-UP
CE UA Le:
FIRE, EXPLOSION, ELECTRICAL SHOCK
HAZARD
Failure to follow this warning could result in personal
injury or death and/or property damage.
1. Follow recognized safety practices and wear protective
goggles when checking or servicing refrigerant system.
bo . Relieve and recover all refrigerant from system before
touching or disturbing anything inside terminal box if
refrigerant leak is suspected around compressor
terminals.
3. Never attempt to repair soldered connection while
refrigerant system is under pressure.
4. Do not use torch to remove any component. System
contains oil and refrigerant under pressure.
5. To remove a component, wear protective goggles and
proceed as follows:
a. Shut off electrical power to unit and install
lockout tag.
b. Relieve and reclaim ail refrigerant from system
using both high- and low-pressure ports.
c. Cut component connecting tubing with tubing
cutter and remove component from unit.
d. Carefully unsweat remaining tubing stubs when
necessary. Oil can ignite when exposed to flame.
Use the Start-Up Checklist supplied at the end of this book and
proceed as follows to inspect and prepare the unit for initial
start-up:
1. Remove all access panels.
2. Read and follow instructions on all DANGER, WARNING,
CAUTION, and INFORMATION labels attached to, or
shipped with, unit. Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and
on unit base. Detecting oil generally indicates a
refrigerant leak. Leak-test all refrigerant tubing
connections using electronic leak detector, or
liquid-soap solution. If a refrigerant leak is detected, see
following Check for Refrigerant Leaks section.
c. Inspect all field- and factory-wiring connections. Be
sure that connections are completed and tight.
d. Inspect coil fins. If damaged during shipping and
handling, carefully straighten fins with a fin comb.
3. Verify the following conditions:
a. Make sure that outdoor-fan blade is correctly positioned
in fan orifice. Top edge of blade should be 3.125 in.
(79.4 mm) down from condenser outlet grille. See
Condenser Fan section.
b. Make sure that air filter is in place.
c. Make sure that condensate drain pan and trap are filled
with water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.

START-UP
Use the Start-Up Checklist supplied at the end of this book, and
proceed as follows:
Step 1 — Check for Refrigerant Leaks
LOCATE AND REPAIR REFRIGERANT LEAKS AND
CHARGE THE UNIT AS FOLLOWS:
1. Using both high- and low-pressure ports, locate leaks and
reclaim remaining refrigerant to relieve system pressure.
2. Repair leak following accepted practices.
NOTE: Instail a filter drier whenever the system has been opened
for repair.
3. Check system for leaks using an approved method.
4. Evacuate refrigerant system and reclaim refrigerant if no
additional leaks are found.
5. Charge unit with R-22 refrigerant, using a
volumetric-charging cylinder or accurate scale. Refer to
unit rating plate for required charge. Be sure to add extra
refrigerant to compensate for internal volume of
field-installed filter drier.
Step 2 — Start-Up Cooling Section and Make
Adjustments
CHECKING COOLING CONTROL OPERATION — Start and
check the unit for proper cooling control operation as follows:
1. Place room thermostat SYSTEM switch in OFF position.
Observe that blower motor starts when FAN switch is
placed in ON position and shuts down when FAN switch is
placed in AUTO position.
. Place SYSTEM switch in COOL position and FAN switch
in AUTO position. Set cooling control below room
temperature. Observe that compressor, condenser fan, and
evaporator blower motors start. Observe that cooling cycle
shuts down when control setting is satisfied.
bo
3. When using an automatic changeover room thermostat,
place both SYSTEM and FAN switches in AUTO.
positions. Observe that unit operates in Cooling mode when
temperature control is set to “call for cooling” (below room
temperature).
Step 3 — Refrigerant Charge
Amount of refrigerant charge is listed on unit nameplate (also refer
to Table 1). Refer to Carrier Refrigerant Service Techniques
Manual, Refrigerants section.
Unit panels must be in place when unit is operating during
charging procedure.
NO CHARGE — Use standard evacuating techniques. After
evacuating system, weigh in the specified amount of refrigerant
(refer to Table 1).
LOW CHARGE COOLING — Use Cooling Charging Charts, Fig.
14-16. Vary refrigerant until the conditions of the appropriate chart
are met. Note that charging charts are different from the type
normally used. Charts are based on charging the units to the correct
superheat for the various operating conditions. Accurate pressure
gage and temperature sensing device are required.
To measure suction pressure, perform the following:
1. Connect the pressure gage to the service port on the suction
line.
2. Mount the temperature sensing device on the suction line
and insulate it so that outdoor ambient temperature does not
affect the reading. Indoor-air cfm must be within the
normal operating range of the unit.
TO USE COOLING CHARGING CHARTS
1. Take the outdoor ambient temperature and read the suction
pressure gage.
bo . Refer to appropriate chart to determine what the suction
temperature should be.
an . If suction temperature is high, add refrigerant. If suction
temperature is low, carefully recover some of the charge.
4. Recheck the suction pressure as charge is adjusted.
EXAMPLE: (Fig. 14)
Outdoor Temperature «00... cee 85°F (29°C)
Suction Pressure ....... ccs 80 psig
Suction Temperature should be ........... 70°F (21°C)
(Suction Temperature may vary +5° F, [2.8°C])
If Chargemaster© charging device is used, temperature and
pressure readings must be accomplished using the charging
chart.
Step 4 — Indoor Airflow and Airflow Adjust-
ments
NOTE: | For cooling operation, the recommended airflow is 350
to 450 CFM for each 12,000 Btuh of rated cooling capacity.
Table 2 shows dry coil air delivery for horizontal discharge units.
Tables 3-4 show pressure drops.
NOTE: Be sure that all supply- and return-air grilles are open,
free from obstructions, and adjusted properly.
CUANDO:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power to the unit and install lockout
tag before changing blower speed. There may be more than
one disconnect switch.
Airflow can be changed by changing the lead connections of the
blower motor.
Units 50ZP036,048, and 060 blower motors are factory wired for
low speed operation.
FOR 208/230-V — The motor leads are color-coded as follows:
3-SPEED
black = high speed
2-SPEED
black = high speed
blue = medium speed
red = low speed red = low speed
To change the speed of the blower motor (BM), remove the fan
motor speed leg lead from the indoor (evaporator) fan relay (IFR)
and replace with lead for desired blower motor speed. Insulate the
removed lead to avoid contact with chassis parts.
10

OUTDOOR TEMP
oe 8G
115 46
105 41
95 35
85 29
75 24
65 18
65 13
45 7
_
SUCTION
LINE
PRESSURE,
(PSIG
..
65
Zé
oO
wo
x
qa
oa
as
x
WW
a
2
na
wn
lu
oe
oO
uw
2
a
Zz
So
=
Os
2
wo
50
4 10 16 21
SUCTION LINE TEMPERATURE (°C)
00017
Fig. 14 - Cooling Charging Chart, 50ZP036 Units
OUTDOOR TEMP
7B 8G
115 46
105 41
95 35
mn AQ
85 29
75 24
65 18
S
65 13
45 7
ts
OS
B
SUCTION
LINE
PRESSURE
(KILOPASCALS)
we
S
ui
:
SUCTION
LINE
PRESSURE,
(PSIG
&
3
50 &G 70
4 10 16 21 ar 32
SUCTION LINE TEMPERATURE (°C)
co0019
Fig. 15 - Cooling Charging Chart, 50ZP048 Units
Step 5 — Unit Controls
All compressors have the following internal-protection controls.
HIGH-PRESSURE RELIEF VALVE — This valve opens when
the pressure differential between the low and high side becomes
excessive.
COMPRESSOR OVERLOAD — This overload interrupts power
to the compressor when either the current or internal temperature
become excessive, and automatically resets when the internal
temperature drops to a safe level. This overload may require up to
60 minutes (or longer) to reset; therefore, if the internal overload is
suspected of being open, disconnect the electrical power to the unit
and check the circuit through the overload with an ohmmeter or
continuity tester.
OUTDOOR TEMP
oF 2G
125 52
115 46
105 41
95 35
85 29
75 24
65 18
65 13
45 7
SUCTION
LINE
PRESSURE
(KILOPASCALS)
_
SUCTION
LINE
PRESSURE,
(PSIG),
50
4 10 16 21
SUCTION LINE TEMPERATURE (°C)
c00020
Fig. 16 - Cooling Charging Chart, 50ZP060 Units
Step 6 — Sequence of Operation
FAN OPERATION — The FAN switch on the thermostat controls
indoor fan operation. When the FAN switch is placed in the ON
position, the IFR (indoor-fan relay) is energized through the G
terminal on the thermostat. The normally-open contacts close,
which then provide power to the indoor (evaporator) fan motor
(IFM). The IFM will run continuously when the FAN switch is set
to ON.
When the FAN switch is set to AUTO, the thermostat deenergizes
the IFR (provided there is not a call for cooling). The contacts open
and the IFM is deenergized. The IFM will be energized only when
there is a call for cooling.
NOTE: Units are equipped with a time-delay relay. The indoor
fan remains on for 30 seconds after G or Y is deenergized.
COOLING — On a call for cooling, the compressor contactor (C)
and the IFR are energized through the Y and G terminalis of the
thermostat. On units with a compressor time-delay relay, there is a
5-minute (+45 sec) delay between compressor starts. Energizing
the compressor contactor supplies power to the compressor and the
outdoor (condenser) fan motor (OFM). Energizing the IFR
provides power to the IFM.
When the need for cooling has been satisfied, the OFM,
compressor, and IFM (FAN on AUTO) are deenergized. If the unit
is equipped with a 30-second delay, the indoor fan will remain
energized for 30 seconds after the compressor is deenergized (030
and 060 units only).
MAINTENANCE
To ensure continuing high performance, and to reduce the
possibility of premature equipment failure, periodic maintenance
must be performed on this equipment. This cooling unit should be
inspected at least once each year by a qualified service person. To
troubleshoot cooling of units, refer to Troubleshooting chart in
back of book.
NOTE: TO EQUIPMENT OWNER: Consult your local dealer
about the availability of a maintenance contract.
11

CE UA Le:
PERSONAL
HAZARD
Failure to follow this warning could result in personal
injury or death and possible unit component damage.
INJURY AND UNIT DAMAGE
The ability to properly perform maintenance on_ this
equipment requires certain expertise, mechanical skills,
tools and equipment. If you do not possess these, do not
attempt to perform any maintenance on this equipment,
other than those procedures recommended in the Owner’s
Manual.
The minimum maintenance requirements for this equipment are as
follows:
1. Inspect air filter(s) each month. Clean or replace when
necessary.
bo . Inspect indoor coil, outdoor coil, drain pan, and condensate
drain each cooling season for cleanliness. Clean when
necessary.
3. Inspect blower motor and wheel for cleanliness each
cooling season. Clean when necessary.
4, Check electrical connections for tightness and controls for
proper operation each cooling season. Service when
necessary.
5. Check the drain channel in the top cover periodically for
blockage (leaves, insects). Clean as needed.
Cn UA LO:
ELECTRICAL SHOCK HAZARD
Failure to follow these warnings could result in personal
injury or death:
1. Turn off electrical power and install lockout tag to the
unit before performing any maintenance or service on
this unit. There may be more than one disconnect switch.
i) . Use extreme caution when removing panels and parts.
an . Never place anything combustible either on or in contact
with the unit.
Step 1 — Air Filter
IMPORTANT: Never operate the unit without a suitable air filter
in the return-air duct system. Always replace the filter with the
same dimensional size and type as originally installed. See Table 1
for recommended filter sizes.
Inspect air filter(s) at least once each month and_ replace
(throwaway-type) or clean (cleanable-type) at least twice during
each cooling season or whenever the filters become clogged with
dust and lint.
Replace filters with the same dimensional size and type as
originally provided, when necessary.
Step 2 — Unit Top Removal (Condenser-Coil
Side)
NOTE: When performing maintenance or service procedures that
require removal of the unit top, be sure to perform ail of the routine
maintenance procedures that require top removal, including coil
inspection and cleaning, and condensate drain pan inspection and
cleaning.
CE UA Le:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power, and install lockout tag to the
unit before removing top. There may be more than one
disconnect switch.
Only qualified service personnel should perform maintenance and
service procedures that require unit top removal.
Refer to the following top removal procedures:
1. Remove 7 screws on unit top cover surface. (Save all
screws.)
bo . Remove 2 screws on unit top cover flange. (Save all
screws.)
3. Lift top from unit carefully. Set top on edge and make sure
that top is supported by unit side that is opposite duct (or
plenum) side.
4. Carefully replace and secure unit top to unit, using screws
removed in Steps 1 and 2, when maintenance and/or service
procedures are completed.
Step 3 — Evaporator Blower and Motor
For longer life, operating economy, and continuing efficiency,
clean accumulated dirt and grease from the blower wheel and
motor annually.
CUANDO:
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal
injury or death.
Disconnect electrical power, and install lockout tag to the
unit before cleaning and lubricating the blower motor and
wheel. There may be more than one disconnect switch.
To clean the blower wheel:
1. Access the blower assembly as follows:
a. Remove top access panel.
b. Remove 3 screws that hold blower orifice ring to blower
housing. Save screws.
c. Loosen setscrew(s) which secure wheel to motor shaft.
2. Remove and clean blower wheel as follows:
a. Lift wheel from housing. When handling and/or
cleaning blower wheel, be sure not to disturb balance
weights (clips) on blower wheel vanes.
b. Remove caked-on dirt from wheel and housing with a
brush. Remove lint and/or dirt accumulations from
wheel and housing with vacuum cleaner, using a soft
brush attachment. Remove grease and oil with a mild
solvent.
c. Reassemble blower into housing. Place upper orifice
ring on blower to judge location of the blower wheel.
Blower wheel should be approximately 0.2-in. (5 mm)
below bottom of orifice ring when centered correctly.
Be sure setscrews are tightened on motor and are not on
round part of shaft.
d. Set upper orifice ring in place with 3 screws removed in
step 1.
e. Replace top access panel.

Step 4 — Condenser Coil, Evaporator Coil, and
Condensate Drain Pan
Inspect the condenser coil, evaporator coil, and condensate drain
pan at least once each year. Proper inspection and cleaning requires
the removal of the unit top. See Unit Top Removal section above.
The coils are easily cleaned when dry; therefore, inspect and clean
the coils either before or after each cooling season. Remove all
obstructions (including weeds and shrubs) that interfere with the
airflow through the condenser coil. Straighten bent fins with a fin
comb. If coated with dirt or lint, clean the coils with a vacuum
cleaner, using a soft brush attachment. Be careful not to bend the
fins. If coated with oil or grease, clean the coils with a mild
detergent-and-water solution. Rinse coils with clear water, using a
garden hose. Be careful not to splash water on motors, insulation,
wiring, or air filter(s). For best results, spray condenser-coil fins
from inside to outside the unit. On units with an outer and inner
condenser coil, be sure to clean between the coils. Be sure to flush
all dirt and debris from the unit base.
Inspect the drain pan and condensate drain line when inspecting
the coils. Clean the drain pan and condensate drain by removing all
foreign matter from the pan. Flush the pan and drain tube with
clear water. Do not splash water on the insulation, motor, wiring, or
air filter(s). If the drain tube is restricted, clear it with a “plumbers
snake” or similar probe device. Ensure that the auxiliary drain port
above the drain tube is also clear.
Step 5 — Condenser Fan
& CAUTION
UNIT OPERATION HAZARD
Failure to follow this caution may result in damage to unit
components.
Keep the condenser fan free from all obstructions to ensure
proper cooling operation. Never place articles on top of
unit.
1. Shut off unit power supply.
bo . Remove condenser-fan assembly (grille, motor, motor
cover, and fan) by removing screws and flipping assembly
onto unit top cover.
an . Loosen fan hub setscrews.
. Adjust fan height as shown in Fig. 17.
a
ot
. Tighten setscrews.
on . Replace condenser-fan assembly.
Bh
Cy
ms
t
MTR ee
3.125 in.
c00021
Fig. 17 - Condenser-Fan Adjustment
Step 6 — Electrical Controls and Wiring
Inspect and check the electrical controls and wiring annually. Be
sure to turn off the electrical power to the unit.
Remove the top panel to locate all the electrical controls and
wiring. Check all electrical connections for tightness. Tighten all
screw connections. If any smoky or burned connections are
noticed, disassemble the connection, clean all the parts, restrip the
wire end and reassemble the connection properly and securely.
After inspecting the electrical controls and wiring, replace all the
panels. Start the unit, and observe at least one complete cooling
cycle to ensure proper operation. If discrepancies are observed in
operating cycle, or if a suspected malfunction has occurred, check
each electrical component with the proper electrical
instrumentation. Refer to the unit wiring label when making these
checkouts.
NOTE: Refer to the Sequence of Operation section, as an aid in
determining proper control operation.
Step 7 — Refrigerant Circuit
Inspect all refrigerant tubing connections and the unit base for oil
accumulations annually. Detecting oil generally indicates a
refrigerant leak.
If oil is detected or if low cooling performance is suspected,
leak-test all refrigerant tubing using an electronic leak-detector, or
liquid-soap solution. If a refrigerant leak is detected, refer to Check
for Refrigerant Leaks section
If no refrigerant leaks are found and low cooling performance is
suspected, refer to Refrigerant Charge section.
Step 8 — Evaporator Airflow
The cooling airflow does not require checking unless improper
performance is suspected. If a problem exists, be sure that all
supply- and return-air grilles are open and free from obstructions,
and that the air filter is clean. When necessary, refer to Indoor
Airflow and Airflow Adjustments section to check the system
airflow.
Step 9 — Metering Devices
The 036 size uses fixed orifices located in the inlet header to the
evaporator coil. The 048 and 060 use a single piston located in the
brass body connected to the feeder tubes.
Step 10 — Liquid Line Strainer
The liquid line strainer (to protect metering device) is made of wire
mesh and is located in the liquid line on the inlet side of the
metering device.
TROUBLESHOOTING
Refer to the Troubleshooting Chart (Table 5) for troubleshooting
information.
START-UP CHECKLIST
Use the Start-Up Checklist at the back of this manual.

Table 2 - Dry Coil Air Delivery* Horizontal Discharge (Deduct 10% for 208 Volt Operation)
Unit Motor Air External Static Pressure (IN. W.C.)
Speed | Delivery 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
Low Watts 450 435 420 400 380 335 326 311 -
Cfm 1231 1218 1204 1120 1008 950 863 751 -
036 Med Watts 470 450 445 410 388 359 338 321 -
Cfm 1302 1264 1205 1163 1081 940 873 783 -
High Watts 660 635 610 575 540 505 485 460 -
Cfm 1700 1660 1581 1450 1297 1190 1095 999 -
Low Watts - - 801 760 730 688 650 600 570
048 Cfm - - 1898 1841 1757 1682 1564 1429 1365
High Watts - - 870 842 818 782 696 632 628
Cfm - - 2000 1903 1799 1718 1625 1446 1333
Low Watts 890 850 810 790 735 680 580 480 422
Cfm 1834 1820 1791 1762 1703 1640 1415 1159 950
060 Med Watts 1040 1018 1000 950 890 835 790 650 580
Cfm 2230 2102 2025 1960 1901 1855 1752 1468 1121
Watts 1073 1038 1001 958 896 840 800 691 575
High Cfm 2230 2202 2160 2122 2052 1926 1791 1588 1202
* Air delivery values are based on operating voltage of 230 v dry coil, without filter. Deduct wet coil, filter pressure drops to obtain external static pressure avail-
able for ducting.
See Tables 3-4.
NOTES:
1. Do not operate the unit at a cooling airflow that is less than 350 cfm for each 12,000 Btuh of rated cooling capacity. Evaporator coil frosting may occur at
airflows below this point.
2. Dashes indicate portions of the table that are beyond the blower motor capacity or are not recommended.
Table 3 — Wet Coil Pressure Drop
UNIT SIZE 50ZP AIRFLOW (CFM) PRESSURE DROP (IN. W.C.)
1000 0.07
1200 0.09
036 1400 0.11
1600 0.12
1400 0.07
048 1600 0.08
1800 0.09
1700 0.07
1800 0.08
060 2100 0.09
2300 0.10
Table 4 — Filter Pressure Drop (IN. W.C.)
UNIT SIZE 50ZP FILTER SIZE IN. (mm) CFM
, 1000 1100 1200 1300 1400
24 x 24
036 (B10 x 610) 0.09 0.09 0.10 0.11 0.12
24 x 30
048, 060 (B10 x 762) - - - 0.08 0.09
UNIT SIZE 50ZP FILTER SIZE IN. (mm) crM
, 1500 1600 1700 1800 1900 2000 2100 2200 2300
24 x 24
036 (B10 x 610) 0.14 0.15 - - - - - - -
24 x 30
048, 060 (B10 x 762) 0.10 0.11 0.12 0.13 0.14 0.15 0.16 0.17 0.18
14

SCHEMATIC
if
23
TY
208/230-1-60
MAXIMUM
WIRE
EQUIP
GND
oe
SIZE
2
AWG
Powe
ax
ns
SUPPL
YEL
ve
YEL
BLK
SEE
NOTE
5
Tf
RED
THERMOSTAT SUB-BASE
\() EE Sa
BLK BLK
| YEL YEL orm
BLK cAP2
¢ KEY HCE) BRN
| eT BLK or
¢
ye EL BLU OVERLOAD PROTECTOR
YER
L— BLK
VEL COMP
nL BLU
wt | COMPRESSOR PLUG
CIF USED)
sv BLU
(060 ONLY) PS
(042 ONLY)
(024,036,048 8 060) ALL EXCEPT 048
——_»—_ 6 RED
Daly
ia iM
(930 & 042)
a
a
Gyo am
OT CAPI
GRN-YEL
Ah
HD CoB) C230) GRN-YEL
TRANT
poy
Cl} BRN é BRN
— GEN
ee
y
TL VEL
wT
dD
(SEE NOTER2)
tomtom BRN
24¥ SPLICE
BOX
BRN mn €
T
®
a '
+ BRK—] 24v SPLICE
TINER Boe
Br BRN —€
FDR:8
re CoG on 1FR:3
BRN———® COM, TRAN
~~ BRN HRI
BRN TOR:B
OR TFR:3
LEGEND
COMPONENT ARRANGEMENT 4D _ FIELD SPLICE C CONTACTOR, COMPRESSOR
CAP CAPACITOR
Cry MARKED WIRE COMP COMPRESSOR MOTOR
at CH) TERMINAL MARKED) EQUIP EOUTPHENT
BRN FL FUSE LINK
&® ° TERMINAL (UNMARKED) Fu FUSE
GND GROUND
i TERMINA K
COMP fy ERMINAL BLOC HR HEATER RELAY (STRIP HEAT)
TNDOOR FAN e SPLICE IFM INDOOR FAN MOTOR
BLOWER HOUSING IFR INDOOR FAN RELAY
CW SPLICE (MARKED)
eno IP INTERNAL PROTECTOR
os wa FACTORY WIRING OFM QUTDOOR FAN MOTOR
cae OT QUADRUPLE TERMINAL
a FTELD CONTROL WIRING $8 SLOW BLOW FUSE
_& @ @ FIELD POWER WIRING ST START THERMISTOR
po NBL SE 8 ae TB TERMINAL BLOCK
Fovalll o “~~~ ACCESSORY OR OPTIONAL WIRING Typ TIME DELAY RELAY
© e TO INDICATE COMMON TH TRERMOSTAT-REATING
POTENTIAL ONLY: TRAN TRANSFORMER
a ag (030,036,042 & 060) NOT 10 REPRESENT WIRING
ae:
| | TOR CAP2 NOTES
0) RUN & OFM cart 1.IF ANY OF THE ORIGINAL WIRE FURNISHED
5 IFM CAP MUST BE REPLACED, IT MUST BE REPLACED
EQUIP GND WITH TYPE 90°C WIRE OR ITS EQUIVALENT
= 6oO 2.SEE PRICE PAGES FOR THERMOSTAT
24V SPLICE AND SUBBASE PART NUMBERS FAN SEQUENCE FOR TDR
Box 3. SET HEAT ANTICIPATOR AT .6
, 4,USE 75°C COPPER CONDUCTORS ONLY.
| \ S.W1/H2 TS CONNECTED ONLY IF EXTERNAL +
| ore HEATING SOURCE IS USED. 5 ; +30
DISCONNECT 24V POWER ENTRY @ ENERGIZED DE -ENERGIZED
PER NEC (024 & 048) cer
cl R
SOZP 500869) -
A11083
Fig. 18 - 50ZP 208/230-1 Wiring Diagram

SCHEMATIC
- 208/230-3-60
MAXIMUM WIRE EQUIP GND = BLK BLK
SIZE 2 AWG F Tt c
ELD BLK Blk ———17T}} BLK carat or
POWEP _ft YEL YEL xis Hap— vet YEL FO-BRN
SUPPLY
Tt
BLU
YEL
or
BLK
BLU: COMP
YEL
IFR
OVERLOAD PROTECTOR
BLU a a (036,048 & 060? ALL EXCEPT 048
3 {30 St rep
BL - BLU u
(036,042 & 060) en
\_ ver. = ia > \ien
5 pe-eei
(042) oT CAPI een YEL—
L__ver
BLK
SEE CoM -
NOTE. 4 TRANI GRN-YEL f
—----- -—|-— 780 8 ¢— BRN - oc
RED RED
~~
(036,042 & 060) Dav SPLICE
— _ ™Le a]| BOX
(036,042 & 060)
z TDR:B
YEL vet oC) BCP oe ER
BRN—® Cou, TRAN
—_L.»
_ tL.»
comon+- 3
(SEE
NOTE*2)
y—BRN
_
_
_
_ _
BRN—O
HRI
BRN: BRN—O TOR; 3 OR
1FR;3
24v SPLICE
BOX LEGEND
COMPONENT ARRANGEMENT _—SD_ FIELD SPLICE C —_ CONTACTOR, COMPRESSOR
CAP CAPACITOR
__(%) MARKED WIRE COMP COMPRESSOR MOTOR
CQ) TERMINAL (MARKED) EQUIP EQUIPMENT
FL FUSE LINK
@ oO TERMINAL (UNMARKED) FU FUSE
GND GROUND
COHP TERMINAL BLOCK HR HEATER RELAY (STRIP HEAT)
INDOOR FAN e SPLICE IFH INDOOR FAN MOTOR
BLOWER HOUSING
— «—<4 | Ce SPLICE cHaRKED) IFR INDOOR FAN RELAY
6ND IP _ INTERNAL PROTECTOR
[Fa FACTORY WIRING OFM OUTDOOR FAN MOTOR
Toes _ OT QUADRUPLE TERMINAL
| L FIELD CONTROL WIRING oe etow Blow Fuse
"7 © —— __ FIELD POWER WIRING TB TERMINAL BLOCK
o 8
TOR
TIME
DELAY
RELAY
6 @ VEL —-— ACCESSORY OR OPTIONAL WIRING ti THERMOSTAT-HEATING
UW © TO INDICATE COMMON TRAN TRANSFORMER
g
——
POTENTIAL
ONLY:
B A (036,042 & 060) NOT TO REPRESENT WIRING
TOR NOTES
f auy{t) caP2 cart 1.1F ANY OF THE ORIGINAL WIRE FURNISHED
; 1 | OFM CAP IFM CAP MUST BE REPLACED, IT NUST BE REPLACED
FOUIP GND t WITH TYPE 90°C WIRE OR 1TS EQUIVALENT.
= 2.SEE PRICE PAGES FOR THERMOSTAT
24V SPLICE AND SUBBASE PART NUMBERS.
F Fi TOR
il OX 3.USE 75°C COPPER CONDUCTORS ONLY. oA SEQUENCE FOR TO
} 4.W1/W2 TS CONNECTED ONLY IF a.3
| | EXTERNAL HEATING SOURCE IS USED. :
0 T T#30
= 6 6
Disconnect 24V POWER ENTRY ENERGIZED DE-ENERG|ZED
| per NEC
502P500668 [A
A11578
Fig. 19 - 50ZP 208/230-3 Wiring Diagram
16

Table 5 — Troubleshooting Chart
SYMPTOM CAUSE REMEDY
Compressor and outdoor fan
will not start
Power failure Call power company
Fuse blown or circuit breaker tripped Replace fuse or reset circuit breaker
Defective contactor, transformer, control relay, or
high-pressure, or low-pressure switch
Replace component
Insufficient line voltage Determine cause and correct
Incorrect or faulty wiring Check wiring diagram and rewire correctly
Thermostat setting too low/too high Reset thermostat setting
Compressor will not start but condenser fan
runs
Faulty wiring or circuit
Loose connections in compressor
Check wiring and repair or replace
Compressor motor burned out, seized, or
internal overload open
Determine cause
Replace compressor
Defective run capacitor, overload, or PTC (positive
temperature coefficient) thermistor
Determine cause and replace
One leg of 3-phase power dead
Replace fuse or reset circuit breaker
Determine cause
Low input voltage Determine cause and correct
Compressor cycles (other than normally sat-
isfying) cooling/heating calls
Refrigerant overcharge or undercharge
Recover refrigerant, evacuate system, and re-
charge to capacities shown on rating plate
Defective compressor Replace and determine cause
Insufficient line voltage Determine cause and correct
Blocked outdoor coil Determine cause and correct
Defective run/start capacitor, overload or start relay Determine cause and replace
Faulty outdoor fan motor or capacitor Replace
Restriction in refrigerant system Locate restriction and remove
Compressor operates continuously
Dirty air filter Replace filter
Unit undersized for load Decrease load or increase unit size
Thermostat temperature set too low Reset thermostat setting
Low refrigerant charge Locate leak, repair, and recharge
Air in system
Recover refrigerant, evacuate system, and re-
charge
Outdoor coil dirty or restricted Clean coil or remove restriction
Excessive head pressure
Dirty air filter Replace filter
Dirty indoor or outdoor coil Clean coil
Refrigerant overcharged Recover excess refrigerant
Air in system
Recover refrigerant, evacuate system, and re-
charge
Indoor or outdoor air restricted or air short-cycling Determine cause and correct
Head pressure too low
Low refrigerant charge Check for leaks, repair and recharge
Restriction in liquid tube Remove restriction
Excessive suction pressure Refrigerant overcharged Recover excess refrigerant
Suction pressure too low
Dirty air filter Replace filter
Low refrigerant charge Check for leaks, repair and recharge
Metering device or low side restricted Remove source of restriction
Insufficient coil airflow Check filter-replace if necessary
Temperature too low in conditioned area Reset thermostat setting
Outdoor ambient below 55°F (13°C) Install low-ambient kit
Filter drier restricted Replace
17

START-UP CHECKLIST
(REMOVE AND STORE IN JOB FILE)
I. PRELIMINARY INFORMATION
Model No
Serial No
Il. PRE-START-UP
_____ Verify that all packing materials have been removed from unit.
____ Verify that condensate connection is installed per installation instructions.
_____ Check ail electrical connections and terminals for tightness.
_____ Check wire proximity to refrigerant tubes and sheet metal edges.
____ Check that indoor (indoor) air filter is clean and in place.
_____ Verify that unit installation is level.
_____ Check fan wheel propeller for location in housing and setscrew tightness.
Ii. START-UP
Supply Voltage: L1-L2 L2-L3 L3-L1
Compressor Amps: L1(C) L2(S) L3(R)
Indoor Fan Amps: Outdoor Fan Amps:
TEMPERATURE-Cooling Mode
Outdoor Air Temperature: DB WB
Return-Air Temperature: DB WB
Cooling Supply Air: DB WB
PRESSURES-Cooling Mode
Refrigerant Suction psig
Suction Line Temp*
Refrigerant Discharge psig
Discharge TempTt
*Measured at suction inlet to compressor
TMeasured at liquid line leaving outdoor coil
Copyright 2011 Carrier Corp. + 7310 W. Morris St. * Indianapolis, IN 46234 Printed in U.S.A. Edition Date: 12/14
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
18
Catalog No: 50ZP-—08SI
Replaces: 50ZP-—07Sl