Carrier 50QQ - Manual (Page 2)

Table 1—Physical Data and bimensions
MODEL 50QQ 018 024 030 036 042 048 060
REFRIGERANT (R-22)
Operating Charge (lb)
Refrigerant Control 7 lbs 4 oz 6 lbs 8 oz 8 lbs 0 oz 7 lbs 4 oz
Piston
8 lbs 2 oz 9 lbs 0 oz 9 lbs 0 oz
SHIPPING WEIGHT (lb) 323 1 329 1 346 1 357 | 402 | 445 | 484
DIMENSIONS (in.)
A
B
C*
48
22'k 1 2472 1 29% 32%
DUCT CONNECTIONS (in.)
D
E
Side-By-Side
Round!
14
Side-By-Side
Rectangular
13"/,eXl3’7,e
13"Ae X 277a
FILTER SIZE (in.)t
Disposable
20x25 20x25 (2)15x20
15x20
20 x 20 (2) 20 X 20
20x25
20 x 20
25x25
20x25
Permanent 15x20 15x20 20 x 20 20x25 20x25 ( 2 ) 15x 20 (2) 20 X 20
*Dimension C includes %-in built-in base support channels
tOptional square duct flanges are available as an accessory for 14-in x 14-in duct.
ijiRecommended field-supplied filters are one-in. thick.
INSPECT EQUIPMENT—File claim with shipping com­
pany if shipment is damaged or incomplete.
COMPLETE SYSTEM REQUIREMENTS before
installing.
Consult local building codes and National Electrical Code
(NEC) ANSI/NFPA 70-1987 for special installation
requirements.
Provide sufficient space for coil airflow clearance, wiring,
and servicing unit. See Fig. 1 and 2. Locate unit where sup­
ply and return air ducts can be conveniently brought out to
unit duct connections.
Unit may be placed with duct side as close to building as
top removal, duct connections and power connections per­
mit. Position unit so water or ice from roof does not drop
directly on top of unit or in front of coil. Make provisions for
condensate drainage and defrost water disposal. Maintain a
4-ft clearance above unit for vertical air discharge.
Roof installation method for 50QQ depends on building con­
struction and special requirements of local building codes.
Ensure that roof can support unit weight. Protect unit from
prevailing winds to ensure adequate defrost.
Step 2—Mount Unit
ON THE GROUND—Mount heat pump on an elevated
frame positioned on a level pad. See Fig. 2 for pad dimen­
sions. Ensure pad does not obstruct coil slots in unit base-
pan. (Slots drain water during heating and defrost cycles.
See Fig. 2 for drain slot locations.) Construct pad to provide
clearance under basepan coil slots for drainage and ice
buildup. In areas where prolonged subfreezing temperatures
or snowfall occur, increase clearance to 12 to 18-in. by con­
structing an angle-iron frame to support unit 12 to 18-in. off
base. Design cross angle of frame so as not to obstruct base-
pan coil slots. See Fig. 3 for recommended frame construc­
tion. Alternate construction should follow dimensions.
Extend a 24-in. gravel apron around pad for condensate and
defrost water drainage field.
ON THE ROOF—Mount unit on a level platform or frame.
Elevate unit for proper clearance as described under ground
insteJlation above. Design roof and plan water runoff so as
to prevent unit and its duct flashing from sitting in water,
in accordance with eJl applicable codes.
NOTES: 1
In areas of snowfall or subfreezing temperatures when elevated
frame Is used Dimension A is 48-in., Dimension B is 42-in. In areas
where elevated frame is not used Dimension A is 45-in , Dimension
B is 39-in
Allow a 3-ft service clearance at front and rear sides of unit
A88063
Fig. 2—Pad Dimensions
Step 3—Make Ductwork Connections
CONNECT RETURN AND SUPPLY AIR DUCT­
WORK—Connect ductwork to unit supply and return air
duct connections. Refer to Fig. 1 and Table 1 for unit supply
and return air connection sizes and locations.
Flanges are provided on Models 018-048 for round duct con­
nections, on Model 060 for rectanguleu- duct connections.
Accessory duct flange kit is available for squeire or rectan­
gular connections on 018-048 units. Refer to accessory
Installation Instructions on page 5 for connections to
ductwork.
Fig. 4 shows a typical duct system with 50QQ installed. Do
not operate unit longer than 5 minutes without ductwork or
damage to blower motor may result.