Carrier 50CD/CH - Manual (Page 2)

Table 1 — Physical Data
UNIT SIZE 50CD/CH008
OPERATING WEIGHT (lb)
Unit 730
With Economizer* 790
Roof Curb* — 14 in. 120
COMPRESSOR
No. ...Type 1 — BRE2 Copeland
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
Nominal Cfm 4100
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
Quantity...Size (in ) 1 1 2 x 9
Nominal Cfm 3000
Minimum and Maximum Cfm (Standard Motor) 2250 - 3650
(Optional Motor) 2250 - 3750
Rpm Range
Maximum Allowable Rpm
Motor Pulley Pitch Diameter (in.)
Fan Pulley Pitch Diameter (in )
Belt No. ...Type
Speed Change per Full Turn of 652 - 924
924
2 4-3 4
12 7
1 A51
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
Cutout (psig) 426 ± 7
Reset (psig) 320 ± 20
LOW-PRESSURE SWITCH (Liquid Line)
Cutout (psig) 27 ± 4
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.
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