a52-1337
Product
Data
52VCR,VER,VQR,VWR09-24
Vertical Packaged
Terminal Air Conditioners
Cooling Only, Electric Heat,
Heat Pump, or Hot Water Heat Units
®
with PURON
Refrigerant (R-410A)
9,000 to 24,000 Nominal Btuh
The 52V Series vertical packaged
units offer the following advantages:
• Completely pre-charged with Puron
environmentally sound refrigerant
(R-410A)
• Easy access for in-place service of
most components
• Multi-function microprocessor board
• Completely insulated cabinet for
sound attenuation and weather
infiltration
• Adjustable fresh air damper
• Tool-less filter replacement
• Weight-supporting, single piece wall
sleeves (except side access
sleeves) for various wall
thicknesses from 5 to 20-in.
• Primary condensate drain
connection on sleeves with
secondary overflow to building
exterior
• All sleeves are shipped with a
weather guard
• Flush type exterior architectural
louvers
© Carrier Corporation 2013 Form 52V-3PD
Features/Benefits
Carrier’s 52V vertical
packaged unit offers design
flexibility, quality, reliabilty,
and multi-function controls
Solid-state circuit board
The circuit board incorporates the following control features:
Evaporator coil low temperature
protection protects the unit. During
the cooling mode, should the evaporator coil experience either a low temperature condition that could result in
ice build-up on the coil or a reduced
airflow situation, a temperature sensor
attached to the coil will deenergize the
unit. The sensor will reenergize the
unit when the coil warms up.
Features/Benefits (cont)
Table of contents
Page
Features/Benefits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-3
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4,5
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7,8
Accessory Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11,12
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14,15
Typical Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18,19
Low ambient lockout locks out compressor at ambient temperatures below
40 F to extend compressor life.
Random restart is used when power
is turned on after a power outage. A
built-in random restart (3 to 4 minutes)
prevents all the compressors from restarting simultaneously.
Compressor restart delay of 3 minutes ensures that system pressures are
allowed to equalize before a compressor restart, which extends compressor
life.
Front desk control allows the user,
when the unit is wired to a front desk
console, to enable or disable each unit
from the front desk, thus saving the energy used to condition unoccupied
rooms.
Fan delay allows the evaporator blower to continue running for up to
45 seconds after the thermostat is satisfied. This feature maximizes cooling
performance.
Ease of service
A service pullout is factory installed for
service convenience and maintenance.
Filter brackets and throwaway filter
are shipped with each unit and are field
installed over the unit’s evaporator
coil. Filter size is 18 x 24 x 1-inch.
Adjustable operation
An adjustable fresh air (manual) damper can be used to meet code requirements for fresh air introduction. When
opened, the fresh air vent allows up to
50 cfm of outside air to be introduced
into the equipment closet. The air then
mixes with return air entering the closet through the return-air grille. See Application Data section for more
information.
the sleeve and the ductwork and electrical are connected.
The sleeve is weight-bearing and supports the entire weight of the 52V unit.
The sleeve provides a weather tight
seal against wind and water infiltration.
3
A
/4-in. male NPT fitting is provided
in the bottom of the sleeve for field
connection to a condensate riser.
Four wall sleeve depths are available
to accommodate wall thickness from 5
to 20 inches. Each sleeve includes a
factory-installed weather guard to
cover the sleeve opening during
construction.
Unique sleeve drain condensate system
A factory-installed drain line connects
the evaporator drain pan to a vertical
pipe connection in the 52V basepan.
Evaporator condensate is delivered
from the unit to a catch tray in the wall
sleeve and exits the sleeve through the
3
/4-in. male NPT fitting.
This design allows the plumber to
completely pipe the drain to a condensate riser during the pre-installation
stage, thus decreasing the likelihood of
condensate connection problems usually encountered when trying to connect the HVAC (heating, ventilation,
and air conditioning) condensate drain
to the riser after the HVAC unit is installed in the closet.
This feature also allows the 52V unit
to be removed for service without
disconnecting the condensate piping.
This configuration does not require any
additional closet space to make the
drain connection, as do some competitive products.
Redundant systems
If for any reason the primary condensate riser becomes clogged, water will
fill the catch tray and then be diverted
through the sleeve to the exterior of
the building, in a secondary system,
rather than be allowed to overflow into
the closet or living area. Rain water entering the sleeve is automatically diverted to the building exterior as well.
Return air options
Ductable return air tabs are provided
on the inlet of the evaporator coil to
permit the connection of return air
ductwork if required by local codes.
Please note that most installations
would not normally require ducted return air.
Attractive appearance
The new flush-style architectural louver
is an attractive extruded aluminum architectural louver that attaches to the
outside face of the wall sleeve. The
blades of the grille recess into the wall
sleeve for a neat, flush appearance.
Louvers install from the inside of the
wall sleeve. The 52V unit should not
be installed into the sleeve before installing the louver.
Thermostat control
The 52V unit is easily controlled by a
standard low voltage wall-mounted
thermostat instead of complicated unitmounted controls. Low voltage wires
are routed out the left side of the
cabinet.
Easy installation
Rear or side installation wall sleeves
are provided for pre-installation. When
ready, the 52V unit is simply slid into
2
APPROXIMATE
FASTENER
LOCATIONS
ARCHITECTURAL
GRILLE
WALL SLEEVE
TO OUTSIDE
ELECTRICAL SERVICE
KNOCK-OUT
ELECTRICAL
DISCONNECT
REAR
ACCESS
PANEL
DRAIN
52VCR UNIT SHOWN
a52-1338
a52-1339
Model number nomenclature
52 — Vertical Packaged
Terminal Air
Conditioner
Heat Options
VC —C
VE — Cooling with Electric Heat
VQ —Heat Pump
VW — Cooling with Hot Water Heat
Refrigerant Option
R — R-410A Refrigerant
Nominal Btuh
09 — 9,000
12 — 12,000
18 — 18,000
24 — 24,000
ooling Only
52 VE 12
R
03
Heater Type
00 — None
02 — 2 kW Electric Heat (sizes 09 and 12 only)
03 — 3 kW Electric Heat
04 — 4 kW Electric Heat
05 — 5 kW Electric Heat (sizes 12 to 24 only)
06 — 6 kW Electric Heat (sizes 18 and 24 only)
08 — 8 kW Electric Heat (sizes 18 and 24 only)
10 — 10 kW Electric Heat (sizes 18 and 24 only)
2R — 2-Row Hot Water Coil
3R — 3-Row Hot Water Coil (sizes 18 and 24 only)
3
Capacity ratings
COOLING RATINGS — 52VCR COOLING ONLY, 52VER
ELECTRIC HEATING, AND 52VWR HOT WATER HEAT
UNITS
UNIT
52VCR,VER,VWR09 8,900 9.0
52VCR,VER,VWR12 11,500 9.0
52VCR,VER,VWR18 17,400 9.0
52VCR,VER,VWR24 21,500 9.0
NOTES:
1. Tested at 95 F/75 F WB outdoor and 80 F DB/ 67 F WB indoor.
2. Tested in accordance with AHRI (Air-Conditioning, Heating, and
Refrigeration Institute) Standard 390.
COOLING
CAPACITY (Btuh)
EER
COOLING RATINGS — 52VQR HEAT PUMP UNITS
UNIT
52VQR09 8,900 9.0 3.0
52VQR12 11,400 9.0 3.0
52VQR18 17,400 9.0 3.0
52VQR24 22,600 9.0 3.0
LEGEND
EER — Energy Efficiency Ratio
NOTE: Rated in accordance with AHRI (Air-Conditioning, Heating, and
Refrigeration Institute) Standard 390. Ratings are net values, reflecting
the effects of circulating fan heat. Ratings are based on:
Cooling Standard: 80 F db, 67 F wb indoor entering-air temperature
and 95 F db, 75 F wb air entering outdoor unit.
COOLING
CAPACITY (Btuh)
EER COP
HEATING RATINGS — 52VQR HEAT PUMP UNITS
UNIT
52VQR09 8,500
52VQR12 11,500
52VQR18 16,700
52VQR24 22,300
NOTE: Rated in accordance with AHRI (Air-Conditioning, Heating, and
Refrigeration Institute) Standard 390. Ratings are net values, reflecting
the effects of circulating fan heat. Ratings are based on:
Heating Standard: 70 F db, 60 F wb indoor entering-air temperature
and 47 F db, 43 F wb air entering outdoor unit.
HEATING
CAPACITY (Btuh)
ELECTRIC HEATER RATINGS — 52VER ELECTRIC
HEATING AND 52VQR HEAT PUMP UNITS
ELECTRIC HEAT DATA
UNIT SIZE
52VER,VQR09
52VER,VQR12
52VER,VQR18
52VER,VQR24
kW Btuh
230v 208v230v 208v
2 1.50 6,800 5,100
3 2.25 10,200 7,700
4 3.00 13,600 10,200
2 1.50 6,800 5,100
3 2.25 10,200 7,700
4 3.00 13,600 10,200
53.38 15,350 11,500
3 2.25 10,200 7,700
4 3.00 13,600 10,200
53.38 15,350 11,500
6 4.50 20,500 15,350
8 6.00 27,300 20,500
10 6.75 30,700 23,000
3 2.25 10,200 7,700
4 3.00 13,600 10,200
53.38 15,350 11,500
6 4.50 20,500 15,350
8 6.00 27,300 20,500
10 6.75 30,700 23,000
4
HEATING RATINGS — 52VWR HOT WATER HEAT UNITS
UNIT
52VWR12
52VWR18
(2-Row Coil)
52VWR18
(3-Row Coil)
52VWR24
(2-Row Coil)
52VWR24
(3-Row Coil)
AIR FLOW
(CFM)
500
370
780
690
760
680
820
590
800
580
GPM
4 3.2 12.7 17.8 28.0
3 1.9 12.2 17.1 26.9
2 0.9 11.5 16.1 25.3
4 3.2 10.6 14.8 23.3
3 1.9 10.2 14.3 22.5
2 0.9 9.6 13.5 21.2
4 3.2 16.4 22.9 36.0
3 1.9 15.7 22.0 34.6
2 0.9 14.6 20.4 32.0
4 3.2 15.3 21.4 33.6
3 1.9 14.7 20.6 32.4
2 0.9 13.6 19.1 30.0
4 4.7 21.1 29.5 46.3
3 2.7 20.2 28.3 44.5
21.3 18.8 26.3 41.3
4 4.7 19.7 27.6 43.4
32.7 18.9 26.5 41.6
2 1.3 17.6 24.7 38.8
43.2 16.8 23.5 36.9
3 1.9 16.1 22.5 35.3
2 0.9 14.9 20.8 32.7
4 3.2 14.0 19.6 30.8
3 1.9 13.4 18.8 29.5
2 0.9 12.6 17.6 27.6
4 4.7 21.7 30.4 47.8
32.7 20.8 29.1 45.7
2 1.3 19.2 26.9 42.3
4 4.7 17.9 25.0 39.3
3 2.7 17.1 24.0 37.7
2 1.3 16.1 22.5 35.3
PRESSURE
DROP (in. wg)
BTUH (x1000) AT ENTERING WATER TEMPERATURE
120 F 140 F 180 F
Physical data
UNIT
52VCR 245 245 255 255
52VER 245 245 255 255
52VQR 245 245 255 255
52VWR — 245 255 255
09 12 18 24
SHIPPING WEIGHT (lb)
5
Field-installed accessories
Wall sleeves — Wall sleeves are available as a rear or side
installation. The wall sleeve can be installed during construction and the unit installed at a later time. The sleeve
can bear the entire weight of the 52V unit and provides a
watertight seal against wind and weather. The condensate
drain is built directly into the wall sleeve for pre-installation
ahead of the unit. Four wall sleeve depths are available to
accomodate wall thicknesses of 5 to 20 inches. A hurricane sleeve is available with a thicker, more durable construction for areas that may experience intense weather
conditions. Each sleeve includes a factory-installed guard to
cover the sleeve opening during construction.
Exterior grilles (architectural louvers) — The exterior
grilles attach to the outside face of the wall sleeve and provide protection for the unit.
Interior panel — The interior panel is used for access to
the unit installed in the closet. The panel is available as a
louvered panel or a solid panel. The solid panel will result
in lower sound levels. An external air grille and unit mount
filter are required. The louvered panel allows air return into
the closet to the unit and includes an 18 x 24 x 1-in. filter.
Panels are shipped 10 per carton.
Thermostats — A complete line of thermostats is available to meet any control requirements. Thermostats are
available in both horizontal or vertical layout types. Both
cooling and electric/hot water heat thermostats (5 wire)
and heat pump thermostats (6 wire) are available.
6
DUCT OPENING
1
A
B
FILTER
ELEMENT
BLOWER
MOTOR
CONDESER
OUTLET
CONDENSER
INLET
20
66
41 1/4
20
20
LOW
VOLTAGE
ELECTRICAL
KNOCKOUT
SERVICE PULLOUT
RETURN AIR
6 1/8
10
DUCT OPENING
1
A
B
FILTER
ELEMENT
BLOWER
MOTOR
CONDESER
OUTLET
CONDENSER
INLET
20
66
41 1/4
20
20
LOW
VOLTAGE
ELECTRICAL
KNOCKOUT
SERVICE PULLOUT
RETURN AIR
6 1/8
10
52VCR,VER COOLING ONLY AND COOLING WITH ELECTRIC HEAT UNITS
52VQR09-24 HEAT PUMP UNITS
NOTE: Dimensions are in inches.
UNIT
52VC,VCR,
VE,VER
DIMENSIONS
(in.)
AB
09,12,18 6 1/2 6 1/2
24 10 3
NOTE: Dimensions are in inches.
UNIT
52VQ,VQR
DIMENSIONS
(in.)
AB
09,12,18 6 1/2 6 1/2
24 10 3
a52-1340
a52-1341
Base unit dimensions
7
52VWR12-24 COOLING WITH HOT WATER HEAT UNITS
a52-1342
NOTES:
1. Hot water coil connections are 7/8-in. O.D. sweat.
2. Dimensions are in inches.
Base unit dimensions (cont)
CONDENSER
OUTLET
CONDENSER
INLET
DUCT OPENING
1
BLOWER
MOTOR
71-1/4
41-1/4
12
3-3/4
1-1/2
2
3-3/4
FILTER
LOW
VOLTAGE
16
12-3/4
HOT WATER
INLET (1)
HOT WATER
COIL
RETURN
AIR
SERVICE PULLOUT
ELECTRICAL
KNOCKOUT
20
20
20
8
PANEL DIMENSIONS (in.)
PART NO. A B
52VX-LP-L (Louvered Panel)
87 84
52VX-SP-L (Solid Panel)
52VX-LP-S (Louvered Panel)
8279
52VX-SP-S (Solid Panel)
INTERIOR PANEL
a52-1343
ARCHITECTURAL
GRILLE
WALL SLEEVE
H
W
T
D
GRILLE DIMENSIONS (in.)
PART N O . H W
52VX-SG-U
44 2252VX-SG-L
52VX-SG-C
52VX-HG-U
45
3
/822 3/
4
52VX-HG-L
52VX-HG-C
WALL SLEEVE AND EXTERIOR GRILLE
WALL SLEEVE DIMENSIONS (in.)
LEGEND
WAL L
THICKNESS
PART NO. H W D T
5-8 in.
52VX-SS-1
43
3
/421 3/
8
26 952VX-RS-1
52VX-RH-1
8-12 in.
52VX-SS-2
43
3
/421 3/
8
30 1352VX-RS-2
52VX-RH-2
12-15 in.
52VX-SS-3
43
3
/421 3/
8
33 1652VX-RS-3
52VX-RH-3
15-20 in.
52VX-SS-4
43
3
/421 3/
8
38 2152VX-RS-4
52VX-RH-4
RH — Rear Installation Hurricane Sleeve
RS — Rear Installation Sleeve
SS — Side Installation Sleeve
a52-1344
LEGEND
HG — Hurricane Grille
SG — Standard Grille
C—Custom Paint
L—Prep for Paint Application
U—Anodized Aluminum
Accessory dimensions
31 in.
28 in.
A
B
9
Performance data
FAN PERFORMANCE (CFM) — 52VCR,VER UNITS
UNIT SIZE
09
12
18
24
* This speed setting is hard-wired at the factory. To change the speed
setting, the installer must rewire the terminals on the motor. An “H” next
to the speed setting indicates the factory speed setting for heating
MOTOR
SPEED
SETTING*
HIGH 490 480 465 450 440 430 420 410
MEDIUM 390 380 370 360 350 340 330 320
LOW (C) (H) 310 300 290 280 270 260 245 230
HIGH 490 480 470 460 450 440 425 410
MEDIUM (C) 400 390 380 370 360 350 335 320
LOW (H) 310 300 290 280 270 260 250 240
HIGH 740 730 715 700 685 670 650 630
MEDIUM (C) 670 660 645 630 615 600 585 570
LOW (H) 560 550 545 530 515 500 485 470
HIGH 920 900 880 860 835 810 785 760
MEDIUM (C) 870 860 850 840 820 800 775 750
LOW (H) 760 750 740 730 720 710 700 690
0.05 0.10 0.15 0.20 0.25 0.300.350.40
FAN PERFORMANCE (CFM) — 52VQR UNITS
UNIT SIZE
09
12
18
24
* This speed setting is hard-wired at the factory. To change the speed
setting, the installer must rewire the terminals on the motor. An “H” next
to the speed setting indicates the factory speed setting for heating
MOTOR
SPEED
SETTING*
HIGH 490 480 465 450 440 430 420 410
MEDIUM 390 380 370 360 350 340 330 320
LOW (C) (H) 310 300 290 280 270 260 245 230
HIGH 490 480 470 460 450 440 425 410
MEDIUM (C) 400 390 380 370 360 350 335 320
LOW (H) 310 300 290 280 270 260 250 240
HIGH 740 730 715 700 685 670 650 630
MEDIUM (C) 670 660 645 630 615 600 585 570
LOW (H) 560 550 545 530 515 500 485 470
HIGH 920 900 880 860 835 810 785 760
MEDIUM (C) 870 860 850 840 820 800 775 750
LOW (H) 760 750 740 730 720 710 700 690
0.05 0.10 0.15 0.20 0.25 0.300.350.40
EXTERNAL STATIC PRESSURE (in. wg)
mode. A “C” next to the speed setting indicates the factory speed setting for cooling mode.
EXTERNAL STATIC PRESSURE (in. wg)
mode. A “C” next to the speed setting indicates the factory speed setting for cooling mode.
FAN PERFORMANCE (CFM) — 52VWR UNITS
UNIT SIZE
12
18 (2 Row Coil)
18 (3 Row Coil)
24 (2 Row Coil)
24 (3 Row Coil)
* This speed setting is hard-wired at the factory. To change the speed
setting, the installer must rewire the terminals on the motor. An “H” next
to the speed setting indicates the factory speed setting for heating
MOTOR
SPEED
SETTING*
HIGH (C) 510 500 490 480 465 450 435 420
MEDIUM (H) 380 370 360 350 340 330 320 310
MEDIUM (C) 800 780 765 750 735 720 700 680
LOW (H) 700 690 680 670 655 640 630 620
MEDIUM (C) 780 760 745 730 715 700 680 660
LOW (H) 690 680 670 660 645 630 620 610
HIGH (C) 830 820 810 800 790 780 770 760
MEDIUM (H) 610 590 575 560 545 530 520 510
HIGH (C) 810 800 790 780 770 760 750 740
MEDIUM (H) 600 580 565 550 535 520 510 500
10
EXTERNAL STATIC PRESSURE (in. wg)
0.05 0.10 0.15 0.20 0.25 0.300.350.40
mode. A “C” next to the speed setting indicates the factory speed setting for cooling mode.
Electrical data
52VCR,VER UNITS (208/230 V-1 Ph-60 Hz)
BLOWER
DATA
UNIT SIZE
Evaporator
Motor
Compressor
Amps Hp RLA LRA FLA Hp 230v 208v230v 208v230v 208v230v 208v
09 0.72
12 0.72
18 0.87
24 2.8
1
/
4.4 25 0.50
8
1
/
5.6 29 0.72
8
1
/
6.5 43 0.72
8
1
/
9.9 54 0.74
3
LEGEND
FLA — Full Load Amps
HP — Horsepower
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps
CONDENSER
DATA
Condenser
Motor
ELECTRIC HEAT DATA
MCA MOCP
Heater
Typ e
kW
Tota l
Heating
Amps
00 — — — — 7 7 15 15
1
/
15
02 2 1.5 6,800 5,100 10 12 15 15
03 3 2.25 10,200 7,700 15 17 15 20
04 4 3 13,600 10,200 19 22 20 25
00 — — — — 9 9 15 15
02 2 1.5 6,800 5,100 10 12 15 15
1
/
10
03 3 2.25 10,200 7,700 15 17 15 20
04 4 3 13,600 10,200 19 22 20 25
05 4.5 3.38 15,350 11,500 22 25 25 25
00 — — — — 12 12 20 20
03 3 2.25 10,200 7,700 15 17 20 20
04 4 3 13,600 10,200 19 22 20 25
1
/
10
05 4.5 3.38 15,350 11,500 22 25 25 25
06 6 4.5 20,500 15,350 28 33 30 35
0886.0 27,300 20,500 37 43 40 45
10 9 6.75 30,700 23,000 42 48 45 50
00 — — — — 17 17 20 20
03 3 2.25 10,200 7,700 17 19 20 20
04 4 3 13,600 10,200 21 24 25 25
1
/
8
05 4.5 3.38 15,350 11,500 24 27 25 30
06 6 4.5 20,500 15,350 30 35 30 35
0886.0 27,300 20,500 39 45 40 45
10 9 6.75 30,700 23,000 44 50 45 50
11
Electrical data (cont)
52VQR UNITS (208/230 V-1 Ph-60 Hz)
BLOWER
DATA
UNIT SIZE
Evaporator
Motor
Compressor
Amps Hp RLA LRA FLA Hp 230v 208v230v 208v230v 208v230v 208v
09 0.72
12 0.72
18 0.87
24 2.8
1
/
4.4 25 0.50
8
1
/
5.6 29 0.72
8
1
/
6.5 43 0.72
8
1
/
9.9 54 0.74
3
LEGEND
FLA — Full Load Amps
HP — Horsepower
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps
CONDENSER
DATA
Condenser
Motor
ELECTRIC HEAT DATA
MCA MOCP
Heater
Type
kW
Tota l
Heating
Amps
02 2 1.50 6,800 5,100 10 12 15 15
1
/
15
03 3 2.25 10,200 7,700 15 17 15 20
04 4 3.00 13,600 10,200 19 22 20 25
02 2 1.50 6,800 5,100 10 12 15 15
1
/
10
03 3 2.25 10,200 7,700 15 17 15 20
04 4 3.00 13,600 10,200 19 22 20 25
05 4.5 3.38 15,350 11,500 22 25 25 25
03 3 2.25 10,200 7,700 15 17 20 20
04 4 3.00 13,600 10,200 19 22 20 25
1
/
10
05 4.5 3.38 15,350 11,500 22 25 25 25
06 6 4.50 20,500 15,350 28 33 30 35
08 8 6.00 27,300 20,500 37 43 40 45
10 9 6.75 30,700 23,000 42 48 45 50
03 3 2.25 10,200 7,700 17 19 20 20
04 4 3.00 13,600 10,200 21 24 25 25
1
/
8
05 4.5 3.38 15,350 11,500 24 27 25 30
06 6 4.50 20,500 15,350 30 35 30 35
08 8 6.00 27,300 20,500 39 45 40 45
10 9 6.75 30,700 23,000 44 50 45 50
BLOWER
DATA
UNIT SIZE
Evaporator
Motor
Amps Hp RLA LRA FLA Hp 230v 208v230v 208v
12 0.70
18 1.40
24 2.80
1
/
1
/
1
/
LEGEND
FLA — Full Load Amps
HP — Horsepower
LRA — Locked Rotor Amps
MCA — Minimum Circuit Amps
MOCP — Maximum Overcurrent Protection
RLA — Rated Load Amps
52VWR UNITS (208/230 V-1 Ph-60 Hz)
CONDENSER
DATA
Compressor
10
4
3
5.6 29 0.72
6.5 43 0.72
9.9 54 0.74
Condenser
Motor
MCA MOCP
1
/
10
1
/
10
1
/
8
9 91515
13 13 20 20
17 17 25 25
12
L1
GRD
L2
EVAP
MOTOR
COND
MOTOR
FCH
COMPRESSOR
COND
EVAP
LO
EVAP
HI
COMP
HTR2
HTR1
ORG
YEL
YEL
YEL
YEL
BLK
BLK
DISCONNECT
L2
C
R
S
BLK
L1
L2
RED
BLK
YEL
YEL
BRN
208/240 V- 1 PH - 60 HZ
POWER SUPPLY
L2
L2
BLU
RED
BLK
UNUSED SPEED TAPS
CAP OFF ANY
A FACTORY SUPPLIED JUMPER IS
PLACED BETWEEN FD AND RC AND MUST
BE REMOVED WHEN INSTALLING THE
FRONT DESK SWITCH
CAP
GRN
LOCKOUT
COOLING
GND
COM
RV
LO TEMP
LOCKOUT (NO)
BRN
RV
DEFROST
OUTDOOR
COM
INDOOR
BRN
GRN
RED
WHT
BLK
FD
RC
RGYW
RGY
W2C
“C” LEAD MAY BE REQUIRED
FOR ELECTRONIC
THERMOSTATS
24 V CLASS 2 WIRING
BLU
SWITCH (OPTIONAL)
FRONT DESK
FIELD-INSTALLED
1 AMP 250 V FUSE
GRAY
FACTORY WIRING
FIELD WIRING
EVAPORATOR
FROST SENSOR (NO)
24 V REMOTE THERMOSTAT
HEATER 1
L1
L1
L1
L1
BRN
RS
R G Y W2 O
a52-1346
Typical wiring schematic (52VER unit shown)
13
Controls
Sequence of operation
Start-up
The random time delay prevents any unit operation for 10
to 60 seconds after initial application of power to the unit.
The concurrent time delay prevents compressor and
condenser fan operation for 3 minutes. This time delay
also functions any time there is an interruption in the call
for compressor operation.
NOTE: Additional time delays may be programmed into
certain electronic thermostats.
When the thermostat fan switch is set to ON, the evaporator blower is energized.
NOTE: In either cooling or heating mode, if the thermostat
is calling for operation of the compressor during the
3-minute time delay, the evaporator blower will not energize with the fan switch ON.
Cooling
On a call for cooling, the condenser fan and evaporator
blower are energized simultaneously. After 10 seconds the
compressor will energize. All three functions are disabled if
the 3-minute time delay is active. The unit will operate until
the thermostat is satisfied.
When the thermostat is satisfied, the compressor and
condenser fan will deenergize and the evaporator blower
will continue to operate for an additional 45 seconds.
A temperature sensor (normally open) is installed on the
suction line to interrupt the operation of the unit (in cooling
mode only) in the event of limited airflow across the evaporator coil.
An outdoor ambient temperature sensor (normally
open) is installed, which disables compressor and condenser fan operation when the outdoor temperature is below
40 F.
If the compressor is operating when the switch closes,
the compressor will be allowed to operate until the thermostat is satisfied.
If the switch is closed (ambient temperature is less than
40 F), when the thermostat calls for cooling, then the compressor will not be allowed to operate and the indoor blower will operate until the thermostat is satisfied.
Heating (electric and hot water heat)
On a call for heat, for electric heat and hot water heat
units, the evaporator blower and the first bank of heating
elements are energized and function until the thermostat is
satisfied.
NOTE: Units with 5 kW or less of electric heat have only
one bank of elements.
After 15 seconds, the second bank of heating elements
is energized and functions until the thermostat is satisfied.
Each bank of heating elements is equipped with a temperature limit, which will interrupt power to the heating element in the event of excessive temperature.
Heating (heat pump units)
On a call for heating, the condenser fan and evaporator
blower are energized simultaneously and after 10 seconds
the compressor will energize.
NOTE: All three functions are disabled if the 3-minute time
delay is active.
The unit will operate until the thermostat is satisfied.
Any time that power is applied to the unit and the thermostat is set to Heat or Auto, the reversing valve will be
energized and in the heating position. If the room temperature is more than 2 degrees lower than the thermostat set
point, then the electric heating elements will be energized
and will operate until the difference between the set point
and room temperature is less than 2 degrees.
NOTE: Any time that the thermostat calls for electric heat,
the compressor and condenser fan will be locked out and
will not operate until the electric heat is no longer called
for. The 3-minute time delay is functional in this mode and
will override the re-start of the compressor if it is active.
An outdoor ambient temperature sensor (normally
open) is installed, which limits compressor and condenser
fan operation when the outdoor temperature is below
40 F.
If the compressor is operating when the switch closes,
the compressor will be allowed to operate until the thermostat is satisfied.
If the switch is closed (ambient temperature less than
40 F) when the thermostat calls for heat (Y1/W1), the
compressor will not be allowed to operate and the electric
heating elements will operate.
An outdoor coil temperature sensor (normally closed) is
installed which is designed to interrupt compressor and
condenser fan operation if the line temperature gets into a
freeze up condition. Any time that this switch is activated
and there is a thermostat call for heat, the unit will automatically switch to electric heat operation until the switch
resets. A 6-hour time delay is set whenever the sensor interrupts the compressor operation. During this time delay
any call for heat will bring on the electric heating elements.
Thermostat specifications
Fan operation — Press the FAN button to select fan
mode.
Auto mode
al fan period) to sample air temperature. If heating or cooling is not required, fan will turn off. Fan wlll remain inactive until heating or cooling become active.
On mode
Economy mode
temperature will be maintained between the economy heat
(EH) activation temperature and the economy cool (EC) activation temperature. The LCD wlll appear blank. When
room temperature rises 2 F above the EC activation temperature, the LCD will display the cool value and cooling
symbol and activate cooling with fan.
When room temperature falls 2 F below the EH activation temperature, the LCD will display heat value and heating symbol, and activate heating with fan.
Temperature selection — Press UP or DOWN buttons
to set temperature.
— Fan will operate for 3 minutes minimum (tri-
— Maintains constant fan operation.
— Automatic economy function. Room
14
Cooling — Compressor (see Reversing Valve) and fan
turn on automatically when temperature rises (see Deadband) above set point. Compressor has a 15-second delay
before activation. After first cooling call, compressor and
fan will turn on automatically when temperature rises
above set point. Compressor will turn off when temperature drops below set point.
Heating — Compressor (see Reversing Valve) and fan
turn on automatically when temperature drops below set
point. Compressor will activate 15 seconds after fan turns
on.
Auxiliary heat will become active only after the first
3 minutes of compressor operation. Once active, auxiliary
heat will remain on until set point is satisfied or has operated for more than 3 minutes. Auxiliary heat will automatically turn on when temperature drops 4 F below set point.
After first heating call, compressor and fan wlll turn on
automatically when temperature drops below set point.
Compressor will turn off when temperature rises above set
point.
Deadband — Deadband is active on start-up or initial
heating or cooling requirement. When temperature is within 2 F of set point, the fan outputs will be off.
Fan operation will be as specified above.
Reversing valve will remain active.
Reversing valve (heat pump only) — Type B valves
will energize in Heating mode. Reversing valve will turn on
15 seconds prior to heat/cool activity. Reversing valve will
deenergize 3 minutes after compressor call. Reversing
valve will remain inactive for cooling.
Default mode — For 75 to 90 seconds after power has
been removed, the comfort set point (CS) of 72 F (program default) is automatically provided upon restoration of
power. Default operating mode is Run mode. The default
value can be restored by changing the scale.
Diagnostic mode — The Diagnostic mode may be invoked for maintenance purposes to verify thermostat performance. This mode is activated by holding the UP and
DOWN arrow buttons for three seconds. The LCD will display fan operation, current cool or heat status, set point
and room temperature.
To deactivate diagnostic mode, press the FAN button re-
peatedly or change scale with the slide switch.
Scale change — Move the slide switch to C to display
Celsius. Move the slide switch to F to display Fahrenheit.
Changing the scale wlll automatically reset the default comfort set point and run mode operation.
Time delays
• 3-minute delay (minimum) between Off and On
• 1.5-minute delay (minimum) between On and Off
• 3-minute delay (minimum) for auxiliary heat
15
RETURN
AIR
6-in. MIN.
TO CONDENSATE
DRAIN
52V UNIT
1/4-in. MIN.
1/2 BUBBLE
SEALANT
WALL SLEEVE
EXTERIOR
GRILLE
a52-1347
Typical installation
16
VENTILATION
Application data
Location
Whether designing a new structure or replacing packaged
terminal air conditioning units in an existing building,
Carrier units can meet your needs in the following
locations:
•Hotels and motels
• Nursing homes and assisted living care centers
• Offices
•Apartments
• Single-family dwellings
• Home conversions and residential add-ons
New construction
The Carrier 52V vertical packaged terminal air conditioning (PTAC) unit is designed to meet the needs of the architect, engineer, and contractor. For unit installation,
Carrier’s expert support network will assist in all applicable
aspects of the construction project, from preparing a budget to start-up.
Advantages for new construction
Design flexibility for the architect/engineer:
• Whisper-quiet performance, indoors and out
• No bulky duct system
• No separate equipment room
• No water towers or additional cooling equipment
• No complex match-up of different HVAC components
• Less sensitivity to building orientation (sun, wind, shade)
• Optional architectural grille to permit custom exterior
appearance
Initial cost savings for the building owner:
• No expensive component HVAC system to purchase
• No equipment room or maintenance engineering staff
• Weather-protected wall sleeve that goes in place during
building construction (unit slides in place after construc-
tion is complete)
• No seasonal changeover required for cooling or heating
important in choosing the proper PTAC system for the
building structure.
Undersizing — If a PTAC unit is undersized (cooling capacity is less than required capacity for an application), the
unit will not be able to cool the space down to the desired
temperature during very hot days. The result could be
warm and humid or warm and dry conditioned space.
Oversizing — If a PTAC unit is oversized (cooling capacity is greater than required capacity for the specific application), the unit will cool the space down to the desired temperature too quickly. The unit will cycle on and off, however, dehumidification only takes place when the unit is
operating. The result of this type of application in a hot
and/or humid climate would be a cool, yet excessively humid, space.
Air infiltration — Excessive air infiltration can intensify
problems associated with undersizing or oversizing a PTAC
unit. This can be the cause of insufficient cooling, dehumidification, or heating. Sources of air infiltration include
vents, gaps around windows and doors, and improperly
sealed floors, ceilings or wall joints.
Ventilation
A 4-in. aluminum vent pipe is connected to the condenser
fan venturi and the side of the unit cabinet. A mesh screen
is installed inside the vent pipe. A metal plate on the side of
the cabinet covers the opening of the vent pipe.
Up to 50 cfm of fresh air can be introduced into the
equipment closet by removing the metal cover plate. The
fresh air then mixes with the return air and is pulled
through the evaporator coil and into the supply duct.
The cover plate can be re-installed to partially close the
fresh air opening if less than 50 cfm is desired. An external
source of negative pressure (i.e., bathroom fan) could be
used to introduce more than 50 cfm of fresh air if desired.
Lower operating costs and reliable comfort for
the occupant
• Heat pump models offer substantial savings over mod-
els with conventional electric resistance heaters
• Individual units allow tenants to choose the degree of
comfort and operating economy
• Rapid servicing reduces downtime — complete chassis
can be replaced in minutes without disrupting other
occupants.
• Each unit operates independently of other units in the
building. No dependency by building on central HVAC
system.
Sizing
Installation instructions are shipped with all PTAC units. It
is important that air conditioning systems be properly sized
and installed for each application in order to achieve the
desired temperature and humidity levels within the space to
be conditioned.
It is strongly recommended that a professional engineer
match the PTAC units with the building structure and climate. The following application considerations are all
17
Guide specifications
Vertical Packaged Terminal Air Conditioners
HVAC Guide Specifications — 52V
Size Range: 9,000 to 24,000 Nominal Btuh
Carrier Model Numbers:
52VCR (Cooling Only with R-410A Refrigerant)
52VER (Cooling with Electric Heat and
R-410A Refrigerant)
52VQR (Heat Pump with R-410A Refrigerant)
52VWR (Cooling with Hot Water Heat and
R-410A Refrigerant)
Part 1 — General
1.01 SYSTEM DESCRIPTION
Packaged, self-contained, vertical through-the-wall
air-cooled terminal heat pump with electric heat,
straight cool with electric heat, or straight cool with
hot water heat unit. Available with wall sleeve, room
cabinet, electric refrigeration system, electric heating, outside-air grille. Fully charged with R-410A
refrigerant and filled with oil.
1.02 QUALITY ASSURANCE
System shall be approved and certified by UL. Chas-
sis capacity and efficiency performance shall be
rated in accordance with AHRI Standard 390, latest
edition.
Part 2 — Products
2.01 EQUIPMENT
A. Electrical Characteristics:
1. Refer to schedule on drawings for electrical
characteristics.
2. Disconnect switch shall be factory-installed on
equipment.
B. Cabinet:
Cabinet shall be constructed of 20 gage galvanized
steel, with removable front and side panels. Shall be
fully insulated for sound attenuation and reduced air
infiltration. Adjustable fresh air shall be available to
meet code requirements for fresh air introduction.
Removable front panels shall be provided for access
to controls and unit.
C. Refrigeration System:
1. Direct expansion refrigeration cooling coil shall
2. Hermetically sealed compressor with internal
3. Accumulator (heat pump only).
4. Condenser coil and fan.
D. Air System:
Air system shall have centrifugal forward-curved
evaporator fans with three-speed permanent split
capacitor motor, optional filter grille.
3
have
/8-in. OD high-efficiency rifled copper
tubes mechanically bonded to high-efficiency
aluminum fins. All coils shall be factory leak
tested at 350 psig.
spring isolation, external isolation, permanent
split capacitor motor and overload protection.
E. Heating Coil:
1. Electric heating coil shall be 2 to 10 kW
electric.
2. Hot water heating coil shall have
high-efficiency rifled copper tubes mechanically
bonded to high-efficiency aluminum fins. All
coils shall be factory leak tested at 350 psig.
F. Condensate Drain:
Condensate drain shall be connected to a common
drain riser. Should the main drain become plugged,
the wall sleeve design shall divert the water to the
outside of the building.
G. Condenser Fan:
Condenser fan shall be a propeller type with separate split capacitor motor.
H. Adjustable Fresh Air:
Outside air intake shall be adjustable to meet code
requirements for fresh air introduction.
I. Wall Sleeves:
Wall sleeves shall be constructed of 20 gage galvanized steel to provide weathertight seal with disposable weather guard for installation and baked
enamel finish inside and outside. Sleeve shall allow
water to overflow front edge of sleeve if the primary
drain becomes clogged.
J. Grille:
Grille shall be anodized corrosion-resistant aluminum, and custom painted.
K. Controls:
1. Control module shall be a remote thermostat
with heat anticipator, heat-off-cool switch, onauto fan switch.
2. Evaporator coil freeze protection shall be provided. During the cooling mode, should the
evaporator coil experience freezing conditions
that could result in ice build-up on the coil and
subsequent compressor damage, a temperature sensor attached to the coil shall deenergize
the compressor.
3. Low ambient lockout shall be provided to lock
out compressor at ambient temperatures below
40 F to extend compressor life.
4. Random restart shall be provided. When power
is turned on after a power outage, a built-in random restart (3 to 4 minutes) shall prevent all
units from restarting simultaneously. Simultaneous restarting can damage electrical components.
5. Compressor restart delay shall be provided. A
3-minute delay shall ensure that system pressures are allowed to equalize before a compressor restart.
6. Fan delay shall be provided. In the cooling
mode, the fan motor delay shall allow the fan to
continue to operate up to 45 seconds after
thermostat is satisfied.
3
/8-in. OD
18
L. Special Features:
1. A hurricane louver and hurricane wall sleeve
shall be available for coastal areas.
2. A thermostat with adjustable high and low temperature limits shall be available.
3. Interior panel shall be available for field-installation as a louvered or non-louvered type.
19
Carrier Corporation • Syracuse, New York 13221 8-13
Section 4
Ta b 4 a
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Pg 20 Catalog No. 04-52520003-01 Printed in U.S.A. Form 52V-3PD
Replaces: 52V-2PD
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