50DP
Table of contents
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Carrier Parkway • Syracuse NY 13221
Single-Package Cooling Units
INSTALLATION
Rigging and Unit Placement — Inspect unit for
transportation damage. File any claim with trans
portation agency. Do not drop unit. Keep unit
upright. Use spreader bars over unit to prevent
sling or cable damage. Rollers may be used to move
unit across a roof. Level unit by using unit frame as
a reference; unit leveling tolerance is ±1/16 in. per
linear ft in any direction. See Fig. 1 for additional
information. Unit weight is shown in Table 1.
Four lifting holes are provided in ends of unit
base rails as shown in Fig. 1. Refer to rigging
instructions on unit. Refer to Accessory Roof Curb
Installation Instructions for additional information
as required.
Roof Curb — Assemble and install accessory roof
curb in accordance with instructions shipped with
this accessory. Refer to Fig. 2. Accessory roof curb
and information required to field fabricate a roof
curb of 2 in. X 12 in. planks is shown in Fig. 2.
Install insulation, cant strips, roofing and flashing
as shown. Ductwork can be installed to roof curb
before unit is set in place. Curb should be level.
Unit leveling tolerance is ±1/16 in. per linear ft in
any direction. This is necessary to permit unit
drain to function properly.
Parrlor Pnrnnratinn 1Q7Q
Fig. 1 — Rigging Details
Form 50DP-9SI
Table 1 — Physical Data
UNIT SIZE 50DP
OPERATING WT (lb)
Unit
With Economizer
Roof Curb
COMPRESSOR
No. ... Type 2 ... P64
Oil (oz)
REFRIGERANT (Capillary Control) R-22
Charge (lb) Sys 1*, Sys 2
OUTDOOR COIL
Rows 2
F ins/in.
Total Face Area (sq ft)
OUTDOOR AIR FAN
Nominal Cfm
No. ... Diam (in.)
Motor Hp (1075 Rpm) 1/2
INDOOR COIL
Rows
F ins/in.
Total Face Area (sq ft)
INDOOR BLOWER
Qty ... Size (in.)
Nominal Cfm
Rpm Range
Max Allowable Rpm
Motor Pulley Pitch Diam (in.)
Fan Pulley Pitch Diam (in.)
Belt, No. ... Type ... Length (in.)
Speed Change per Full Turn Std
of Moveable Pulley Flange (Rpm) Opt
Moveable Pulley Max Full Turns
from Closed Position
Factory Setting - Full Turns Open
Factory Speed Setting (Rpm)
Motor Hp (Service Factor)
HIGH PRESSURE SWITCH
Cutout (psig)
Reset (psig) 320
LOW PRESSURE SWITCH (Liquid Line)
Cutout (psig)
Reset (psig)
AIR INLET SCREENS
Economizer, No. ... Size (in.)
INDOOR AIR FILTERS (Type)
No. ... Size (in.)
Std 753-1066
Std 2 4-3.4
Std
Std 1 (1.25)
012
1350
1500
200
Hermetic -
76 ea
7 9, 6.6
14
18.9
9000
2 ..22
2
14
14.7
2 .. 10x10
4000
878-1191
1550
2.8-3.8
5.5
5.5
1 ... V .. 41
62
63
5
753
878
1-1/2 (1.20)
2 ... 16x20x2
4 .. 16x25x2 4 ... 16x23x2
- 2 Cy t inders
10% efficient — 2-in. D isposable Fiber Glass
014
1410
1560
200
2 ... P77
76 ea
R-22
8 3, 8.3
Copper Tube, Aluminum Plate Fins/in.
3
14
18 9
Prope 1 ler Type.
8000
2 22
1/2
Copper Tube, Aluminum Plate Fins/in
3
15
13.8
........................ _ .... .
Centrifugal, Adjustable Belt Drive
.............................................
2 10x10
5000
805-1093
978-1265
1550
2 8-3.8
3.4-4 4
6.0
6.0
1 ... V . 43
58
57
5
805
978
2 (1.15)
3 (1.15)
2 ... 20x25x1
1 .. 20x20x1
2 16x20x2
Direct Drive
428
27
60
016
1590
1740
200
Semi-Hermetic — 6 Cylinders
1 . 06DA537
160
R-22
23.2, -
3
14
18 9
12,000
2 ... 26
1
3
14
16.5
2 .. 10 X 10
6000
916-1 186
1158-1428
1550
3.4-4.4
4.3-5.3
6.4
6.4
1 . V ... 45
54
55
5
916
1158
3 (1 15)
3 (1 15)
4 ... 20x20x2
4 .. 16x20x2
t
•System 1 consists of upper portion of outdoor coil and lower portion of indoor coil
Roof Mount — Check building codes for weight
distribution requirements. Unit weight is shown in
Table 1.
Alternate Unit Support Methods — Where the curb
cannot be used, support unit with sleepers using
unit curb support area. If sleepers cannot be used,
support long sides of unit with a minimum of
3 equally spaced 4-in. x 4-in. pads on each side.
Positioning — Provide clearance around and above
unit for airflow, safety and service access. (Fig. 3)
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.
Outdoor Air Intake — The unit can be equipped
with an outdoor air damper (economizer) which
mixes outdoor air with return air.
Field-Fabricated Ductwork — Secure all ducts to
building structure. Use flexible duct connectors
between unit and ducts as required. Insulate and
weatherproof all external ductwork, joints and
roof openings with flashing and mastic in accord
ance with applicable codes.
Ducts passing thru • an unconditioned space
must be insulated and covered with a vapor barrier.
A minimum clearance is not required for any
air duct installation.
Outlet grilles must not lie directly below unit
discharge.
Unit Duct Connections — Unit is shipped for
thru'the-bottom duct connections. Ductwork
openings are shown in Fig. 2 and 3. Duct connec
tions are shown in Fig. 4. Field-fabricated con
centric ductwork may be connected as shown in
Fig. 5. Attach all ductwork to roof curb and roof
curb basepans.
Concentric duct details are shown in Fig. 6.
Also, refer to installation instructions shipped with
accessory roof curb.
Economizer Section — Remove filter access panel.
Check that outdoor air damper is closed and return
air damper is open.
Economizer operation and adjustment is de
scribed in Start-Up, Economizer Operation; and
Service, Economizer Adjustment, respectively.
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Fig. 2 — Roof Curb Details — 50DP012,014,016
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Fig. 3 — Physical Data and Dimensions
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! SPACE RECUIREC FOR
.....J SERVSCE AND AtRFUOW
Outside Air Damper (25% ventilation dir) -- Outside
air damper can be adjusted to permit up to 25%
outdoor air entry into return air compartment.
Outdoor Air Hood Installation (Fig. 3) — The
outdoor air hood is common to 25% air ventilation
and economizer. The economizer and all electrical
connections are factory installed and adjusted. The
hood assembly, outdoor air inlet screen(s) and
required hardware are shipped in a carton located
on outdoor fan section and must be field installed.
Using screws in carton install hood as follows;
1. Assemble hood top cover, side panels and
bottom track angle (Fig. 7).
Loosen base unit top cover sheet metal screws
2.
located above outdoor air inlet opening.
3.
Match notches in hood top cover to unit top
cover screws. Insert hood flange between unit
top cover flange and unit. Tighten screws.
4
Secure hood sides and bottom track angle to
unit. The screw on unit that matches bottom
track angle center hole must be removed prior
to assembly. Re-use screw to secure bottom
track angle to unit.
Insert outdoor air filters and spacer in hood
5.
filter tracks. NOTE: Hood may also be installed
by individually attaching hood parts to base
unit following sequence above.
6. Attach filter retainers to bottom track angle.
Indoor Blower — Blower belts and pulleys are
factory installed. Belts are secured to pulleys with
tape. Remove tape and, if required, adjust as
described in Service, Indoor Blower Adjustment.
Condenser Air Fans and Motors are factory set.
Refer to Service, Condenser Air Fan Adjustment as
required.
NOTE: Do not drill in this area, damage to basepan may result in
water leak
Fig. 5 — Concentric Duct Air Distribution
NOTE: Do not drill in this area, damage to basepan may result in
water leak
Fig. 4 — Air Distribution — Thru-the-Bottom
NOTE: Dimension A, A1 and B, B1 are obtained from field-supplied
ceiling diffuser
Fig. 6 — Concentric Duct Details
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