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Product
Data
50AH Horizontal Indoor Single-Package Cooling Units
2 to 5 Nominal Tons
Single Package Cooling Units
Featuring:
•compact design
•flexibility
•easy maintenance
•high quality and reliability
•quiet and efficient scroll compressor technology
Features/Benefits
All in one package — high cooling efficiency, installation convenience, ease of accessibility for timesaving maintenance.
Space and cost saving design
Model 50AH is specifically designed to provide the building owner with truly out- of-sight cooling, because it installs inside the ceiling. That’s why we call it the Carrier ROOMTOP® unit. The compact design and low silhouette enable it to fit easily and securely above the conditioned space. Single-package construction makes it easy to install with minimal time and cost.
Application flexibility
If desired for particular applications, the unit can also be installed as a split system with the condenser section mounted horizontally. Centrifugal fans permit ducting of both evaporator and condenser air.
Quiet operation
Commercial end users appreciate the extra comfort of quiet operation. Carrier engineers met the challenge by specifying heavy insulation, vibration-resistant construction and operating components that function at low noise levels, all of which keep system sound at a minimum level.
Easy maintenance
When it comes to maintenance, the 50AH rates high in accessibility. Indoor
Copyright 2002 Carrier Corporation |
Form 50AH-6PD |
location is ideal for the maintenance technician, and five access panels, easily removed, provide quick and convenient access to all components when needed. As an added plus, all required service/ maintenance access can be from one side allowing the unit to be located against a wall or ceiling plenum obstruction, an obvious space-saving idea.
Carrier quality and reliability
The Carrier 50AH ROOMTOP® units have much to offer the costand efficiency-conscious commercial owner. Every unit is thoroughly run tested at the factory and equipped with safety controls designed to monitor and protect over the life of the unit.
Scroll compressor technology
Scroll compressors are designed for high efficiency and are internally spring mounted to minimize vibration noise. Each compressor is hermetically sealed against contamination to promote longer life and dependable operation. Scroll compressors are standard on all units.
Table of contents
Page
Features/Benefits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1,2
Model Number Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
ARI Capacity Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Physical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Field-Installed Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Base Unit Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Selection Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Performance Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-9
Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Electrical Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,10
Typical Wiring Schematic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11,12
Typical Piping and Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Application Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Guide Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14,15
Quality Assurance
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Model number nomenclature
50AH – 048 – M – 5 4 1 XX
Model Designation –
50AH Horizontal,
Indoor Single-Package
Cooling Unit
Nominal Tons |
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024 |
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2 |
048 |
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4 |
036 |
– |
3 |
060 |
– |
5 |
Indoor Fan Motor
– – Standard Motor
M – 1.5 hp Optional Motor
FIOP*
Packaging
1– Domestic
2– Export
Design Revision
Voltage |
6 – 460-3-60 |
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3 |
– 230-1-60 |
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5 |
– 208/230-3-60 |
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*FIOP — Factory-Installed option, contact your Carrier representative for details.
ARI* capacity ratings
UNIT |
V-PH-Hz |
TOTAL |
NET TOTAL |
NOMINAL |
EER |
SEER |
SEER |
SOUND RATING |
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50AH |
kW |
COOLING CAP. (Btuh) |
CFM |
(with TDR) |
(dB) |
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024 |
230-1-60 |
2.56 |
24,800 |
800 |
— |
— |
10.50† |
78 |
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036 |
230-1-60 |
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— |
10.00 |
10.00 |
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208/230-3-60 |
4.3 |
36,000 |
1200 |
8.40 |
— |
— |
82 |
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460-3-60 |
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8.40 |
— |
— |
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048 |
230-1-60 |
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— |
— |
10.00† |
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208/230-3-60 |
5.63 |
49,500 |
1600 |
8.80 |
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— |
82 |
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460-3-60 |
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8.80 |
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— |
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060 |
230-1-60 |
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— |
9.70 |
10.00 |
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208/230-3-60 |
6.9 |
58,500 |
2000 |
8.50 |
— |
— |
82 |
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460-3-60 |
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8.50 |
— |
— |
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dB |
— |
LEGEND |
Decibels |
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EER |
— |
Energy Efficiency Ratio |
SEER — |
Seasonal Energy Efficiency Ratio |
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TDR |
— |
Time-Delay Relay |
*Air-conditioning and Refrigeration Institute. †TDR is standard.
NOTES:
1.Ratings are at zero condenser air static and rated in accordance with ARI Standard 210.
NET CAPACITY (Btuh)
2. EER =
TOTAL WATTS
2
Physical data
UNIT 50AH |
024 |
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036 |
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048 |
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060 |
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SHIPPING WEIGHT (lb)* |
560 |
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590 |
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690 |
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700 |
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OPERATING WEIGHT (lb) |
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Base Unit, Evaporator/Condenser Section |
450, 193/256 |
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480, 206/274 |
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580, 250/330 |
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590, 254/336 |
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REFRIGERANT TYPE |
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R-22 |
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Operating Charge (lb)† |
5.4 |
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5.5 |
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7.4 |
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7.6 |
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COMPRESSOR — TYPE |
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Scroll |
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Quantity...Model |
(1)...ZR23 |
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(1)...ZR34 |
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(1)...SR48 |
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(1)...ZR57 |
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Oil (oz) |
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24 |
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42 |
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70 |
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54 |
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HPS Setting (psig) |
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Cutout |
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426 ± 7 |
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Reset |
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320 ± 20 |
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LPS Setting (psig) |
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Cutout |
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27 ± 4 |
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Reset |
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67 ± 7 |
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CONDENSATE DRAIN CONNECTION |
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Size (in.)...Type |
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3/4...FPT |
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CONDENSER COIL |
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Copper Tubes — Aluminum Fins |
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Size (L x H) (in.) |
40 x 15 |
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40 x 16 |
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40 x 22 |
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Number of Rows...Fins/in. |
4...13.6 |
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4...17 |
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4...13.6 |
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CONDENSER FAN |
Centrifugal — Direct Drive |
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Centrifugal — Belt Drive |
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Nominal Cfm |
1350 |
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1350 |
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2250 |
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2450 |
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Maximum Rpm |
1100 |
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1500 |
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Blower Size (in.) |
12 x 6 |
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12 x 9 |
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Pulley Pitch Diameter (in.) |
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Blower |
None |
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5.0 |
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6.0 |
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6.0 |
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Motor (Variable) |
None |
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2.4-3.4 |
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1.9-2.9 |
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2.4-3.4 |
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Motor Hp |
1/2 |
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3/4 |
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1 |
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11/2 |
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Motor Rpm |
825 |
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1725 |
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1725 |
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1725 |
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EVAPORATOR COIL |
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Copper Tubes — Aluminum Fins |
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Size (L x H) (in.) |
34 x 15 |
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34 x 16 |
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34 x 22 |
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Number of Rows...Fins/in. |
4...14.4 |
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4...15 |
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4...14.4 |
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EVAPORATOR AIR FAN (Standard) |
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Centrifugal — Direct Drive |
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Nominal Cfm |
800 |
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1200 |
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1600 |
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2000 |
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Max Rpm |
1100 |
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1150 |
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900/1050** |
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Blower Size (in.) |
10 x 5 |
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10 x 6 |
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10 x 6 |
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Motor Hp (Rpm) |
1/6 (850) |
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1/2 (1075) |
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3/4 (1050) |
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EVAPORATOR AIR FAN (Optional) |
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Centrifugal Belt Drive |
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Nominal Cfm |
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1600 |
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2000 |
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Max Rpm |
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1300 |
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Blower Size (in.) |
Not |
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10 x 8 |
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Motor Hp |
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11/2 |
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Available |
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Motor Rpm |
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1725 |
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Pulley Pitch Diameter (in.) |
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Blower |
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4.2 |
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Motor (Variable) |
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2.4-3.4 |
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INDOOR-AIR FILTERS |
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Factory-Supplied Cleanable Type |
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Number...Size (in.) |
1...14 x 34 x 1 |
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1...21 x 34 x 1 |
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INTERCONNECTING TUBING SIZE (in.)†† |
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Hot Gas |
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1/2 |
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1/2 |
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1/2 |
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1/2 |
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Liquid |
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3/8 |
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3/8 |
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3/8 |
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3/8 |
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LEGEND |
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NOTE: If components are to be split, the maximum length of refrigerant tubing to be |
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HPS — |
High-Pressure Switch |
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used is 50 equivalent ft, assuming components will be installed in same horizontal plane. |
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If components are not to be installed in same horizontal plane, contact your Carrier rep- |
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LPS — |
Low-Pressure Switch |
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resentative for |
more information. For additional |
piping information, refer to Carrier |
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*Shipping weights include base unit plus packaging. |
System Design Manual, Part 3. |
†If components are to be split, additional refrigerant will be needed. |
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**Two-speed motor. |
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††Use Type L copper only. |
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NOTE: Fasten threaded rods through holes in end frames. Use 2 rods on each side of unit for a total of 4.
All panels must be in place when rigging.
OPERATING WEIGHT DISTRIBUTION AND
CENTER OF GRAVITY
UNIT |
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WEIGHT (lb/kg) |
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DIMENSIONS |
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OF CORNER |
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(ft-in./mm) |
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50AH |
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1 |
2 |
3 |
4 |
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A |
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B |
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024 |
93/42 |
108/49 |
139/63 |
120/54 |
2-5 |
/737 |
2-15/8/651 |
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036 |
95/43 |
113/51 |
148/67 |
124/56 |
2-43/4/730 |
2-2 |
/660 |
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048 |
112/51 |
143/65 |
183/83 |
142/64 |
2-5 |
/737 |
2-3 |
/686 |
060 |
114/52 |
143/65 |
186/84 |
147/67 |
2-43/4/730 |
2-23/4/679 |
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3
Field-installed accessories
Thermostat and subbase — Attractive wall-mounted 24-v accessory provides precise temperature control. Automatic and Manual changeover models available. A thermostat subbase is available that works with CycleLOC™ circuitry. If a safety device trips, compressor locks out and subbase warning light (LK OUT) alerts occupant.
Three models available: One stage cool/two stage heat; two stage cool/two stage heat; one stage cool/one stage heat.
Time Guard® II circuit (standard on single-phase units) — Time Guard II device prevents short cycling of compressor if thermostat is rapidly changed; automatically prevents compressor from restarting for 5 minutes after shutdown.
Electric heaters — A wide range of models is available from 5 to 30 kW, 208-, 240and 480-v, singleand 3-ph units. The heaters mount easily on 50AH discharge opening. The heater control box is accessible from the bottom of heater.
Condensate pump — The condensate pump is used when the distance and slope to the nearest drain is far enough to prevent the natural drainage of unit. The pump is mounted remotely from the unit and includes a signal light (field-installed) which illuminates when the reservoir rises beyond a certain level. The unit automatically shuts down when this reservoir level is achieved.
Head pressure control damper — This accessory is duct mounted and allows unit to mechanically cool down to 0° F.
Damper dimensions fit 024, 036 sizes.
NOTE: For use with 048 and 060 size units, ductwork from unit to damper must be reduced in size to fit damper dimensions.
Vibration isolators — Package of four isolators used for dampening any unit vibration so that vibrating sounds are not transmitted to building structure. Isolators are spring, ceiling type.
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88EN ELECTRIC HEAT MODULE |
HEAD PRESSURE CONTROL DAMPER (in.) |
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ACCESSORY |
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DIMENSIONS (in.) |
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UNIT |
A |
B |
C |
D |
DUCT |
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50AH |
OPENING |
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024,036 |
131/2 |
16 |
21/2 |
81/2 |
71/8 x 14 |
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048,060 |
24 |
213/4 |
3 |
19 |
71/8 x 207/8 |
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4
Base unit dimensions
DIMENSIONS (ft-in.)
UNIT |
A |
B |
C |
D |
E |
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50AH |
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024 |
2-5 |
2-15/8 |
1- 53/4 |
1-2 |
1-1 |
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036 |
2-43/4 |
2-2 |
1- 53/4 |
1-2 |
1-1 |
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048 |
2-5 |
2-3 |
1-115/8 |
1-87/8 |
1-77/8 |
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060 |
2-43/4 |
2-23/4 |
1-115/8 |
1-87/8 |
1-77/8 |
UNIT COMPONENT LOCATIONS |
5 |
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