Carrier 48DH - Manual (Page 2)

Table 2 — Physical Data
UNIT 48DL002 48DH002 48DL003 48DL004 48 DM004 48DH004 48DL045 48DL005 48DH005
OPERATING WT (lb) 331 343 385 411 430 438 450 476 512
REFRIG (22) CHG (Ib-oz) 3.2 3 2 3.6 5 1 5 1 5 2 5 1 5 1
COMPRESSOR M27 (1-ph) M27 (1-ph)
M34 M40 M40 M40 P46 P53 P53
AHbbz^/h(J-ph) AH5527h(3-ph)
Cyl inders 2 2 2 2 2 2 2 2 2
Rpm (60-Hz) 3500
CONDENSER FAN Propel ler-Typ e — Direct Drive; Vertical Disc large
Air Quantity (Cfm) 1700 1700 2000 2500 2500 2500 2700 2700 2700
Motor Hp Vs Vs Vs Vs Vs Vs Vs V, Vs
EVAPORATOR FAN Centrifugal — Direct Drive; Horizontal Discharge
CAPACITY (1000 Btuh)
Г
Cool in g 24 24 30 36 36 36 42 48 48
Input Heotlng/Bonnet* 56/42 80/60 80/60 80/60 110/82 5 125/93 75 100/75 110/82 5 150/112 5
MAX EXTERNAL
STATIC PRESSURE
Heating (in. W.C.)
40
FILTERSt (1-in. thick)
Disposable — No. .. 1 15x20 1 15x20 1 15x20 1 20x25 1 20x25
Size (in.) 1 .20x25 1 20x25 2 15x20 1 20x20 1 20x20 1 .20x20 2 20x20 1 25x25 1 .25x25
Permanenti — No. ..
Size (in.)
1 15x20 1 15x20 1 20x20 1 20x20 1 20x20 1 .20x20 1 20x25 2 15x20 2 15x20
HEAT TEMP RISE (F) 35-65 45-75 35-65 35-65 35-65 45-75 35-65 35 65 45-75
* Ratings shown for elevations up to 2000 ft above sea level. For ele­
vations above 2000 ft deduct 4% capacity for each 1000 ft above
sea level
i Recommended field-supplied filter
ifBased on 0.082 in. wg pressure drop or less thru filter at 520 ft/min
face velocity.
OUTSIDE AIR LIMITATIONS - Although there
are no restrictions on either the percentage or the
temperature of the outside air circulated thru the
unit, the rate of moisture condensation from the
combustion process increases significantly when
return air temperature drops below 50 F. Protect
the drain holes in the bottom pan against ice
buildup if outside air of below freezing tempera­
ture is used
VIBRATION ISOLATION -- The unit compressor,
evaporator fan and condenser fan are mounted on
isolators to minimize vibration. Additional isola­
tion is not required for slab mounting. With some
types of roof construction, however, the use of
field-furnished mbber pad type isolators may be
advisable.
Unit Rigging
1. Sling the unit perpendicularly to shipping skid
mnners. Use spreader bars to prevent damage
from sling or cable.
2. Raise unit to desired location and remove
shipping skid.
3. Mount and level the unit as indicated in Unit
Support and Mounting section.
Unit Support and Mounting
LEVELING THE UNIT — Level the unit from end
to end but pitch the unit slightly (3/8 to 1/2 in )
towards the condensate drain on the service access
face of the unit (Fig. 1). Use the unit frame as a
leveling reference.
SLAB MOUNTING — Mount the unit on a
concrete pad, cement blocks, bricks or creosoted
wood of sufficient area and strength to support the
unit weight (Table 2) without distortion or damage
and maintain the drainage pitch recommended
above.
A gravel apron will prevent grass and foliage
from obstructing the condenser air inlet (Fig. 1).
FLAT OR RECESSED ROOF MOUNTING should
be as close as possible to the roof duct opening
Place the unit on at least 2 wooden 2x4 in. or
2x6 in. sleepers.
Sleepers may be perpendicular to or parallel to
the unit mounting rails, but must span at least 2
roof joists or purlins to distribute unit weight. Set
the sleepers in roof cement or mastic. Do not plug
drain
holes in the compressor or furnace
compartment.
Do not support the unit by the ends of the base
rails, nor use vibration isolators at these points.
Unit will not be properly supported and could sag
in the middle.
PITCHED ROOF MOUNTING -- Constmct a
s t u r d y
w e l d e d o r b o l t e d f r a m e o f
1-1/2 X 1-1/2 X 1/4 in. or larger angle iron, with
frame members at right angles to unit rails. Make
provisions for securing unit to frame. Use roof
cement or mastic where frame is in contact with
roof.
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