Number One
AirConditbning
Maker
I Division of
" Carrier Corporatio
Carrier Parkway • Syracuse NY 13221
Instiillation, Start-U|5
and Service Instructions
Single-Package Cooling Units
SAFETY CONSIDERATIONS
Installation and servicing of air conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and quali fied service personnel should install, repair or service air conditioning equipment.
Untrained personnel can perform basic mainte nance functions of cleaning coils and filters and replacing filters. All other operations should be per formed by trained service personnel. When working on air conditioning equipment, observe precautions in the literature, tags and labels attached to the unit and other safety precautions that may apply.
Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have fire extinguisher available for all brazing operations.
INSTALLATION
Unit Rigging and Placement — Inspect for trans portation damage. File any claim with transporta tion agency. Spreader bars are not required if top crating is left on unit. Keep unit upright. Do not drop unit (see Fig. 1). Rollers may be used to move unit across a roof. Level by using frame as a refer ence. Leveling tolerance is ± 1 / 16-in. per linear foot in any direction. This is necessary for condensate drain to function properly. Table 1 shows unit weight. See Fig. 1 for rigging details.
Fig. 1 — Rigging Details
© Carrier Corporation 1983 |
Form 50CD-23SI |
Table 1 — Physical Data |
|
|
UNIT SIZE |
|
50CD/CH008 |
OPERATING WEIGHT (lb) |
|
|
Unit |
|
730 |
With Economizer* |
|
790 |
Roof Curb* — 14 in. |
|
120 |
COMPRESSOR |
|
1 — BRE2 Copeland |
No. ...Type |
|
|
Oil (oz) |
|
124 |
REFRIGERANT (Capillary Control) |
|
R-22 |
Charge (lb) |
|
105 |
CONDENSER COIL |
|
Copper Tubes, Aluminum Fins |
Rows |
|
2 |
Fins/in. |
|
13 9 |
Total Face Area (sq ft) |
|
15 6 |
CONDENSER AIR FAN |
|
4100 |
Nominal Cfm |
|
|
No. ...Diameter (in.) |
|
1 22 |
Motor Hp (1075 Rpm) |
|
1/2 Hp |
EVAPORATOR COIL |
|
Copper Tubes, Aluminum Fins |
Rows |
|
3 |
Fins/in. |
|
13 9 |
Total Face Area (sq ft) |
|
82 |
EVAPORATOR AIR FAN |
|
1 1 2 x 9 |
Quantity...Size (in ) |
|
|
Nominal Cfm |
|
3000 |
Minimum and Maximum Cfm (Standard Motor) |
|
2250 - 3650 |
(Optional Motor) |
|
2250 - 3750 |
Rpm Range |
|
652 - 924 |
Maximum Allowable Rpm |
|
924 |
Motor Pulley Pitch Diameter (in.) |
|
2 4-3 4 |
Fan Pulley Pitch Diameter (in ) |
|
12 7 |
Belt No. ...Type |
|
1 A51 |
Speed Change per Full Turn of |
|
54 |
Moveable Pulley Flange (Rpm) |
|
|
|
|
|
Moveable Pulley Maximum Full Turns |
|
|
from Closed Position |
|
|
Factory Setting — Full Turns Open |
|
3 |
Factory Speed Setting (Rpm) |
|
760 |
Motor Hp (Service Factor) Standard |
|
1 Hp (1 4) |
Optional |
|
1 5 Hp (1 3) |
HIGH-PRESSURE SWITCH |
|
426 ± 7 |
Cutout (psig) |
|
|
Reset (psig) |
|
320 ± 20 |
LOW-PRESSURE SWITCH (Liquid Line) |
|
27 ± 4 |
Cutout (psig) |
|
|
Reset (psig) |
|
67 ± 7 |
OUTDOOR AIR INLET SCREENS* |
|
|
Economizer, No . Size (in ) |
|
2 19 X 31 X 1/2 — None on 50CH008 |
RETURN AIR FILTERS* (Type) |
|
Disposable — None on 50CH008 |
No. ...Size (in.) |
|
2 16 X 20 X 1 |
|
2 20 X 20 X 1 |
|
|
|
|
|
|
|
»50CD008 only |
|
|
Accessory Roof Curb (50CD008) — See Fig. 2. Assemble and install in aeeordance with instruetions shipped with curb. Install insulation, cant strips, roofing and flashing as required. Ductwork must be attached to curb.
Unit gasketing to roof curb is critical for water integrity. Make sure that gasketing material shipped with the roof curb has been properly installed as indicated in Fig. 2.
Roof Mount — Check building codes for weight distribution requirements. Table 1 shows unit weight.
Slab Mount (50CH008) — Provide a level con crete slab the same width as unit that extends to ends of base rails only. The slab should be 8 in. thick with 4 in. above grade. Install a gravel apron in front of
©
outdoor air inlet to prevent grass and foliage from obstructing airflow. Allow a minimum of 6 in. under outdoor coil for condensate drainage. In areas where prolonged sub-freezing temperatures or heavy snow occur, increase clearance to 12 in. mini mum, 18 in. maximum.
Positioning — Position unit to prevent snowdrifts from blocking condenser coil and outdoor air intake (50CD008). Provide clearance around and above unit for airflow, safety and service access.
Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contaminated air.
Although unit is weatherproof, guard against water from higher level runoff and overhangs.
Fig. 2 — 50CD008 Roof Curb Dimensions and Details
t
t
Fig. 3 — 50CD008 Base Unit Dimensions
4
#
Fig. 4 — 50CH008 Base Unit Dimensions
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