Carrier 50HG014-028 User Manual download pdf

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

PC 111 Catalog No. 535-00092 Printed in U.S.A. Form 50HG-7SI Pg 1 11-03 Replaces: 50HG-3SI

Book 1 4

Tab 1 b 6 b

Installation Instructions

CONTENTS

Page

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23

Step 1 — Provide Unit Support . . . . . . . . . . . . . . . . . . . 1

•ROOF CURB

• ALTERNATE UNIT SUPPORT

Step 2 — Remove Shipping Rails . . . . . . . . . . . . . . . . 3

Step 3 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . 3

• POSITIONING

• ROOF MOUNT

• INSTALLATION ONTO CURB

Step 4 — Field Fabricate Ductwork. . . . . . . . . . . . . . . 8

Step 5 — Make Unit Duct Connections . . . . . . . . . . . 8

Step 6 — Trap Condensate Drain. . . . . . . . . . . . . . . . . 9

Step 7 — Make Electrical Connections . . . . . . . . . . . 9

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

Step 8 — Install Outdoor-Air Hood . . . . . . . . . . . . . . 20

Step 9 — Position Optional Power Exhaust

or Barometric Relief Damper Hood. . . . . . . . . . . . 22

Step 10 — Non-Fused Disconnect. . . . . . . . . . . . . . . 22

Step 11 — Install All Accessories . . . . . . . . . . . . . . . 23

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should

install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance

functions of replacing filters. All other operations should

be performed by trained service personnel. When working

on air-conditioning equipment, observe precautions in the

literature, tags and labels attached to the unit, and other safety

precautions that may apply.

Follow all safety codes. Wear safety glasses and work

gloves. Use quenching cloth for unbrazing operations. Have

fire extinguishers available for all brazing operations.

INSTALLATION

Step 1 — Provide Unit Support

ROOF CURB — Assemble or install accessory roof curb in

accordance with instructions shipped with this accessory. See

Fig. 1. Install insulation, cant strips, roofing, and counter flash-

ing as shown. Ductwork can be installed to roof curb before

unit is set in place. Curb must be level. This is necessary to

permit unit drain to function properly. Unit leveling tolerance is

in. per linear ft in any direction. Refer to Accessory

Roof Curb Installation Instructions for additional information

as required. When accessory roof curb is used, unit may be

installed on class A, B, or C roof covering material.

ALTERNATE UNIT SUPPORT — When a curb cannot be

used, install unit on a noncombustible surface. Support unit

with sleepers, using unit curb support area. If sleepers cannot

be used, support long sides of unit with a minimum of 3 equal-

ly spaced 4-in. x 4-in. pads on each side.

Before performing service or maintenance operations on

unit, turn off main power switch to unit. Electrical shock

could cause personal injury.

IMPORTANT: Units have high ambient operating lim-

its. If limits are exceeded, the units will automatically

lock the compressor out of operation. Manual reset will

be required to restart the compressor.

IMPORTANT: The gasketing of the unit to the roof curb

is critical for a watertight seal. Install gasket with the

roof curb as shown in Fig. 1. Improperly applied gasket

can also result in air leaks and poor unit performance.

50HG014-028

Single Package Rooftop Units

Electric Cooling with Electric Heat Option

1 2 3 4 5 6 ... 23 24

Summary of Contents

Page 1 - Installation Instructions

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 2 - Fig. 1 — Roof Curb Details

10Table 2A — Electrical Data (Units Without Optional Convenience Outlet)LEGEND AND NOTES FOR TABLES 2A AND 2BLEGEND*Fuse or HACR circuit breaker.†208/

Page 3 - Step 3 — Rig and Place Unit —

11Table 2A — Electrical Data (Units Without Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CI

Page 4 - Fig. 3 — Rigging Details

12Table 2A — Electrical Data (Units Without Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CI

Page 5 - Fig. 4 — Base Unit Dimensions

13Table 2A — Electrical Data (Units Without Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CI

Page 6 - Table 1 — Physical Data

14Table 2A — Electrical Data (Units Without Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CI

Page 7

15Table 2B — Electrical Data (Units With Optional Convenience Outlet)See Legend and Notes on page 10.UNITSIZE50HGNOMINALVOLTAGE(3 Ph, 60 Hz)VOLTAGERAN

Page 8

16Table 2B — Electrical Data (Units With Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CIRCU

Page 9

17Table 2B — Electrical Data (Units With Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CIRCU

Page 10

18Table 2B — Electrical Data (Units With Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CIRCU

Page 11

19Table 2B — Electrical Data (Units With Optional Convenience Outlet) (cont)ELECTRIC HEAT BRANCH CIRCUIT FOR 208/240-V 75-kW ELECTRIC HEATFEEDER CIRCU

Page 12

2Fig. 1 — Roof Curb Details

Page 13

20Set heat anticipator settings as shown in Table 3.Table 3 — Heat Anticipator SettingsSettings may be changed slightly to provide a greater degreeof

Page 14

21TOP HOODSECTIONSEALSTRIPLOCATIONBOTTOMHOODSECTIONFILTERGUIDEFILTERGUIDEHOODSIDEADDSEALSTRIPADDSEALSTRIPHOODSIDEINNERFILTERTRACKADDSEALSTRIPADDSEALST

Page 15

22Step 9 — Position Optional Power Exhaust orBarometric Relief Damper Hood — The optionalpower exhaust or barometric relief dampers are shippedassembl

Page 16

23Step 11 — Install All Accessories —After all ofthe factory-installed options have been adjusted, install allfield-installed accessories. Refer to th

Page 17

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.PC 1

Page 18

3Step 2 — Remove Shipping Rails —Remove ship-ping rails prior to lowering unit onto roof curb. See Fig. 2. Therails are attached to the unit at both t

Page 19

4Fig. 3 — Rigging Details

Page 20

5Fig. 4 — Base Unit Dimensions

Page 21

6Table 1 — Physical DataLEGENDUNIT 50HG 014 016 020VOLTAGE208/230and 460575208/230and 460575208/230and 460575NOMINAL CAPACITY (Tons)12.5 12.5 15 15 17

Page 22

7Table 1 — Physical Data (cont)LEGENDUNIT 50HG 024 028VOLTAGE208/230and 460575 ALLNOMINAL CAPACITY (Tons)20 20 25OPERATING WEIGHT (lb)50 SERIES (Cooli

Page 23

8Step 4 — Field Fabricate Ductwork —Secure allducts to building structure. Use flexible duct connectors be-tween unit and ducts as required. Insulate

Page 24 - Tab 1 b 6 b

9Step 6 — Trap Condensate Drain —See Fig. 10for drain location. One 3/4-in. half coupling is provided outsideunit evaporator section for condensate dr

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Carrier 50HG014-028 User Manual

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