Carrier 50DP User Manual

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.

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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

18.9

9000

2 ..22

14.7

2 .. 10x10

4000

878-1191

1550

2.8-3.8

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.

18 9

Prope 1 ler Type.

8000

2 22

1/2

Copper Tube, Aluminum Plate Fins/in

13.8

........................ _ .... .

Centrifugal, Adjustable Belt Drive

.............................................

2 10x10

5000 805-1093 978-1265

1550

2 8-3.8

3.4-4 4

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, -

18 9

12,000 2 ... 26

16.5

2 .. 10 X 10

6000

916-1 186

1158-1428

1550

3.4-4.4

4.3-5.3

6.4

1 . V ... 45

54 55

916

1158 3 (1 15) 3 (1 15)

4 ... 20x20x2

4 .. 16x20x2

•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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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

located above outdoor air inlet opening.

Match notches in hood top cover to unit top

cover screws. Insert hood flange between unit

top cover flange and unit. Tighten screws.

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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