Carrier 50TC User Manual

50TC Single Package Rooftop, 50Hz Cooling Only Sizes 07, 08, 09, and 12 with Puronr (R---410A) Refrigerant

Installation Instructions

NOTE: This manual discusses only the mechanical installation of this unit. Star--up procedures, operating sequences and service instructions are included in a separate Service/Maintenance manual which is not included with this unit. Other manuals may be required for specific factory--installed options.

Read through the entire installation instruction manual before starting the installation, to familiarize yourself with all steps and to identify additional reference materials required.

Contact your local Carrier representative for additional service reference materials.

TABLE OF CONTENTS

SAFETY CONSIDERATIONS 1....................

INSTALLATION 6...............................

Step 1 -- Plan for Unit Location 6..................

Step 2 -- Plan for Sequence of Unit Installation 7......

Step 3 -- Inspect Unit 7...........................

Step 4 -- Provide Unit Support 7...................

Step 5 -- Field Fabricate Ductwork 10...............

Step 6 -- Rig and Place Unit 11....................

Step 7 -- Convert to Horizontal & Connect Ductwork 11

Step 8 -- Install Outside Air Hood 11...............

Step 9 -- Install External Condensate Trap and Line 13.

Step 10 -- Make Electrical Connections 13...........

Step 11 -- Adjust Factory--Installed Options 35........

Step 12 -- Install Accessories 35...................

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or use can cause explosion, fire, electrical shock or other conditions which may cause personal injury or property damage. Consult a qualified installer, service agency, or your distributor or branch for information or assistance. The qualified installer or agency must use factory--authorized kits or accessories when modifying this product. Refer to the individual instructions packaged with the kits or accessories when installing.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloths for brazing operations and have a fire extinguisher available. Read these instructions thoroughly and follow all warnings or cautions attached to the unit. Consult local building codes for special requirements. In absence of local codes, it is recommended that the USA standard ANSI/NFPA 70, National Electrical Code (NEC), be followed.

It is important to recognize safety information. This is the safety--alert symbol

unit and in instructions or manuals, be alert to the potential for personal injury.

Understand the signal words DANGER, WARNING, CAUTION, and NOTE. These words are used with the safety--alert symbol. DANGER identifies the most serious hazards which will result in severe personal injury or death. WARNING signifies hazards which could result in personal injury or death. CAUTION is used to identify unsafe practices, which may result in minor personal injury or product and property damage. NOTE is used to highlight suggestions which will result in enhanced installation, reliability, or operation.

. When you see this symbol on the

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death.

Before performing service or maintenance operations on unit, always turn off main power switch to unit and install lockout tag. Unit may have more than one power switch.

WARNING

UNIT OPERATION AND SAFETY HAZARD

Failure to follow this warning could cause personal injury, death and/or equipment damage.

Puronr (R--410A) refrigerant systems operate at

50TC

higher pressures than standard R--22 systems. Do not use R--22 service equipment or components on Puron refrigerant equipment.

WARNING

PERSONAL INJURY AND ENVIRONMENTAL HAZARD

Failure to follow this warning could cause personal injury or death.

Relieve pressure and recover all refrigerant before system repair or final unit disposal.

Wear safety glasses and gloves when handling refrigerants. Keep torches and other ignition sources away from refrigerants and oils.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury.

Sheet metal parts may have sharp edges or burrs. Use care and wear appropriate protective clothing, safety glasses and gloves when handling parts and servicing furnaces.

Vertical Connections / Economizer

50TC

Horizontal Connections / Economizer

Fig. 1 -- Unit Dimensional Drawing – 07 Size Units

C09447

50TC

C09448

Fig. 1 -- Unit Dimensional Drawing – 07 Size Unit (cont.)

Vertical Connections / Economizer

50TC

Horizontal Connections / Economizer

Fig. 2 -- Unit Dimensional Drawing – 08, 09 and 12 Size Units

C09450

50TC

C09451

Fig. 2 -- Unit Dimensional Drawing – 08, 09 and 12 Size Units (cont.)

INSTALLATION

Jobsite Survey

Complete the following checks before installation.

1. Consult local building codes or the U.S.A. National Electrical Code (Ref: ANSI/NFPA 70, [American National Standards Institute/National Fire Protection Association], latest revision) for special installation requirements.

2. Determine unit location (from project plans) or select unit location.

3. Check for possible overhead obstructions which may interfere with unit lifting or rigging.

Step 1 — Plan for Unit Location

Select a location for the unit and its support system (curb or other) that provides for the minimum clearances required for safety. This includes the clearance to combustible surfaces, unit performance and service access below, around and above unit as specified in unit drawings. See Fig. 3.

NOTE: Consider also the effect of adjacent units. Unit may be installed directly on wood flooring or on

approved roof--covering material when roof curb is used. Do not install unit in an indoor location. Do not locate air

inlets near exhaust vents or other sources of contaminated air.

457 [18"]

1067 [42"]

Required bottom condensate drain connection. Otherwise, 914mm [36"] for condensate connection.

457 [18"]

C09454

Fig. 3 -- Service Clearance Dimensional Drawing

Although unit is weatherproof, avoid locations that permit water from higher level runoff and overhangs to fall onto the unit.

Select a unit mounting system that provides adequate height to allow installation of condensate trap per requirements.RefertoStep9—InstallExternal Condensate Trap and Line – for required trap dimensions.

Roof mount —

Check building codes for weight distribution requirements. Unit operating weight is shown in Table 1.

Table 1 – Operating Weights

50TC --- UNITS KG (LB)

Component A07 D08 D09 D12

Base Unit 275 (607) 340.5 (750) 388.2 (855) 392.7 (865)

Economizer

Vertical 36 (80) 36 (80) 36 (80) 36 (80)

Horizontal 48 (105) 48 (105) 48 (105) 48 (105)

Curb

356 mm/14---in 60 (133) 60 (133) 65 (143) 60 (133)

610 mm/24---in 79 (174) 79 (174) 69 (153) 79 (174)

Step 2 — Plan for Sequence of Unit Installation

The support method used for this unit will dictate different sequences for the steps of unit installation. For example, on curb--mounted units, some accessories must be installed on the unit before the unit is placed on the curb. Review the following for recommended sequences for installation steps.

Curb--mounted installation —

Install curb Install field--fabricated ductwork inside curb Install accessory thru--base service connection package

(affects curb and unit) (refer to accessory installation instructions for details)

Prepare bottom condensate drain connection to suit planned condensate line routing (refer to Step 9 for details)

Rig and place unit Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Pad--mounted installation —

Prepare pad and unit supports Check and tighten the bottom condensate drain

connection plug Rig and place unit Convert unit to side duct connection arrangement Install field--fabricated ductwork at unit duct openings Install outdoor air hood Install condensate line trap and piping Make electrical connections Install other accessories

Frame--mounted installation —

Frame--mounted applications generally follow the sequence for a curb installation. Adapt as required to suit specific installation plan.

Step 3 — Inspect unit

Inspect unit for transportation damage. File any claim with transportation agency.

Step 4 — Provide Unit Support

Roof Curb Mount —

Accessory roof curb details and dimensions are shown in Fig. 4 (size 07 units) and Fig. 5 (size 08 – 12 units). Assemble and install accessory roof curb in accordance with instructions shipped with the curb.

NOTE: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 4 and Fig. 5. Improperly applied gasket can also result in air leaks and poor unit performance.

Curb should be level. This is necessary for unit drain to function properly. Unit leveling tolerances are show in Fig. 6. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Install insulation, cant strips, roofing felt, and counter flashing as shown. Ductwork must be attached to curb and

not to the unit. The accessory thru--the--base power package must be installed before the unit is set on the roof curb.

If electric and control wiring is to be routed through the basepan, attach the accessory thru--the--base service connections to the basepan in accordance with the accessory installation instructions.

Slab Mount (Horizontal Units Only) —

Provide a level concrete slab that extends a minimum of 150 mm (6 in.) beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Alternate Unit Support (In Lieu of Curb or Slab Mount) —

A non--combustible sleeper rail can be used in the unit curb support area. If sleeper rails cannot be used, support the long sides of the unit with a minimum of 3 equally spaced 102 mm x 102 mm (4--in. x 4--in.) pads on each side.

50TC

Confirm before installation of unit that voltage, amperage and circuit protection requirements listed on unit data plate agree with power supply provided.

CRBTMPWR003A01

CRBTMPWR004A01

50TC

CONNECTOR

PKG. ACCY.

[551]

/16”

1’-4”

[406]

1’-9

D ALT

DRAIN

HOLE

/4”

[44.5]

POWER CONTROL

/4” [19] NPT

/4” [31.7]

/2” [12.7]

NPT

ACCESSORY

POWER

/2” [12.7]

NPT

ROOFCURB

ACCESSORY

CRRFCURB001A01

CRRFCURB002A01

A UNIT SIZE

1’-2”

[356]

50TC-A07

2’-0”

[610]

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels.

3. Dimensions in [ ] are in millimeters.

4. Roof curb: galvanized steel.

5. Attach ductwork to curb (flanges of duct rest on curb).

6. Service clearance: 4 ft on each side.

7. Direction of airflow.

Fig. 4 -- Roof Curb Details – 07 Size Units

C09452

50TC-*08

– 1212

50TC

ROOFCURB

ACCESSORY

CRRFCURB003A01

CRRFCURB004A01

1’ - 2”

[356]

2’ - 0”

[610]

UNIT SIZE

50TC-*08

–

Fig.5--RoofCurbDetails–08—12SizeUnits

C09453

MAXIMUM ALLOWABLE

DIFFERENCE IN. (MM)

A-B

0.5” (13)

B-C

1.0” (25)

A-C

1.0” (25)

C06110

Fig. 6 -- Unit Leveling Tolerances

Step 5 — Field Fabricate Ductwork

Cabinet return-air static pressure (a negative condition) shall not exceed 87 Pa (0.35 in. wg) with economizer or 112 Pa (0.45 in. wg) without economizer.

For vertical ducted applications, secure all ducts to roof curb and building structure. Do not connect ductwork to unit.

Insulate and weatherproof all external ductwork, joints, and roof openings with counter flashing and mastic in accordance with applicable codes.

Ducts passing through unconditioned spaces must be insulated and covered with a vapor barrier.

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable fire codes.

For units with accessory electric heaters: Horizontal applications require a minimum clearance to combustible surfaces of 25 mm (1--in) from duct for first 305 mm (12--in) away from unit. Vertical applications do not require a minimum clearance.

Minimum clearance is not required around ductwork.

50TC

PLACE ALL SEAL STRIP

“B”

FAN

SIDE

UNIT

50TC-A07 336 740 1890 74.5 965 38.0 850 33.5

50TC-D08 641 1410 2235 88.0 1040 41.0 1055 41.5

50TC-D09 693 1525 2235 88.0 1030 40.5 1255 49.5

50TC-D12 711 1565 2235 88.0 1015 40.0 1255 49.5

NOTES:

1. Dimensions in ( ) are in inches.

2. Hook rigging shackles through holes in base rail, as shown in detail “A.” Holes in base rails are centered around the unit center of gravity. Use wooden top to prevent rigging straps from damaging unit.

914-1371 (36"-54")

SEE DETAIL “A”

“C”

“A”

MAX WEIGHT

KG LB MM IN MM IN MM IN

IN PLACE BEFORE PLACING UNIT ON ROOF CURB

DUCT END

DIMENSIONS

A B C

DETAIL A

C09458

Fig. 7 -- Rigging Details

Step 6 — Rig and Place Unit

Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 7 for additional information.

Lifting holes are provided in base rails as shown in Fig. 7. Refer to rigging instructions on unit.

CAUTION

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment damage.

All panels must be in place when rigging. Unit is not designed for handling by fork truck.

Before setting the unit onto the curb, recheck gasketing on curb.

PositioningonCurb—

Position unit on roof curb so that the following clearances

are maintained: 6.4 mm (

/4in.) clearance between the

roof curb and the base rail inside the front and back,

0.0 mm (0.0 in.). clearance between the roof curb and the base rail inside on the duct end of the unit. This will result in the distance between the roof curb and the base rail inside on the condenser end of the unit being approximately equal to section C--C in Figs. 4 and 5.

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

After unit is in position, remove rigging skids and shipping materials.

C06108

Fig. 8 -- Horizontal Conversion Panels

50TC

Step 8 — Install Outside Air Hood

Economizer Hood Removal and Setup -- Factory Option

1. The hood is shipped in knock--down form and located in the return air compartment. It is attached to the economizer using two plastic tie--wraps.

2. To gain access to the hood, remove the filter access panel. (See Fig. 9.)

3. Locate and cut the (2) plastic tie--wraps, being careful to not damage any wiring. (See Fig. 10.)

4. Carefully lift the hood assembly through the filter access opening and assemble per the steps outlined in Economizer Hood and Two–Position Hood on page 12.

Step 7 — Convert to Horizontal and Connect Ductwork (when required)

Unit is shipped in the vertical duct configuration. Unit without factory--installed economizer or return air smoke detector option may be field--converted to horizontal ducted configuration. To convert to horizontal configuration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulation--side down. Seals around duct openings must be tight. See Fig. 8.

Field--supplied flanges should be attached to horizontal duct openings and all ductwork should be secured to the flanges. Insulate and weatherproof all external ductwork, joints, and roof or building openings with counter flashing and mastic in accordance with applicable codes.

Do not cover or obscure visibility to the unit’s informative data plate when insulating horizontal ductwork.

FILTER ACCESS PANEL

INDOOR COIL ACCESS PANEL

C06023

Fig. 9 -- Typical Access Panel Locations

Remove Hood Parts

Cut Plastic Ties (2) Places

Economizer

Economizer Hood and Two--Position Hood—

1. The indoor coil access panel will be used as the top of the hood. Remove the screws along the sides and bottom of the indoor coil access panel. See Fig. 12.

TOP PANEL

Fig. 10 -- Economizer Parts, Shipping Location

50TC

Two Position Damper Hood Removal and Setup -Factory Option

1. The hood is shipped in knock--down form and assembled to a metal support tray using plastic stretch wrap. Located in the return air compartment, the assembly’s metal tray is attached to the basepan and also attached to the damper using two plastic tie--wraps.

2. To gain access to the hood, remove the filter access panel. (See Fig. 9.)

3. Locate the (2) screws holding the metal tray to the basepan and remove. Locate and cut the (2) plastic tie--wraps securing the assembly to the damper. (See Fig. 11.) Be careful to not damage any wiring or cut tie--wraps securing any wiring.

4. Carefully lift the hood assembly (with metal tray) through the filter access opening and assemble per the steps outlined in the following procedure Economizer Hood and Two–Position Hood.

C08633

TOP PANEL

INDOOR COIL ACCESS PANEL

C06025

INDOOR COIL ACCESS PANEL

CAULK HERE

Fig. 12 -- Indoor Coil Access Panel Relocation

2. Swing out indoor coil access panel and insert the hood sides under the panel (hood top). Use the screws provided to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 13.

TOP PANEL

INDOOR COIL ACCESS PANEL

LEFT HOOD SIDE

19 1/16”

(483mm)

SCREW

Hood Parts

Plastic Tie Wrap Qty (2)

Screws for Metal Tray Qty (2)

C08639

Fig. 11 -- Two--Position Damper, Shipping Location

33 3/8”

(848mm)

HOOD DIVIDER

Fig. 13 -- Economizer Hood Construction

3. Remove the shipping tape holding the economizer barometric relief damper in place.

4. Insert the hood divider between the hood sides. See Fig. 13 and 14. Secure hood divider with 2 screws on each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.

C06026

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