Carrier 50EW- Manual

Carrier 50EW

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Table of Contents:

  • Page 2 – UNIT LEVELING TOLERANCES DIMENSIONS*
  • Page 5 – UNIT SIZE; VFD — Variable Frequency Drive
  • Page 8 – Step 2 — Rig and Place Unit —; Inspect unit for trans-; ALL PANELS MUST BE IN PLACE
  • Page 9 – Table 1 — Physical Data
  • Page 11 – Table 2 — Evaporator Fan Motor Data; Step 3 — Field Fabricate Ductwork —
  • Page 12 – Step 6 — Controls Options —; Fig. 10 — Condensate Drain Connections
  • Page 13 – Fig. 11 — Field Control Remote Start/Stop
  • Page 14 – CCN
  • Page 15 – Step 7 — Make Electrical Connections; Fig. 13 — Field Power Wiring Connections
  • Page 25 – Step 8 — Make Outdoor-Air Inlet Adjustments
  • Page 26 – Fig. 18 — Adding Seal Strip to; Fig. 20 — Adding Seal Strip to
  • Page 30 – Step 10 — Install Accessories —; After all the factory-; VAV — Variable Air Volume; Fig. 32 — Pressure Transducer Locations
  • Page 32 – Table 7 — VFD Set Point; PRESSURE
  • Page 33 – Power Exhaust —; Table 8 — Potentiometer Signal Levels
  • Page 36 – Table 12 — Fan Performance, 50EJ/EK024-034 — Vertical Discharge Units
  • Page 38 – Table 14 — Fan Performance, 50EJ048 — Vertical Discharge Units; Table 15 — Air Quantity Limits
  • Page 41 – Fig. 35 — Heat Interlock Relay Wiring
  • Page 42 – SERVICE
  • Page 43 – Fig. 38 — Evaporator-Fan Pulley Alignment
  • Page 44 – Fig. 39 — Belt Tension Adjustment
  • Page 46 – TROUBLESHOOTING; Typical refrigerant circuiting diagrams are shown in Fig. 43-45.; Fig. 43 — Typical Refrigerant Circuiting
  • Page 47 – Fig. 44 — Typical Refrigerant Circuiting
  • Page 48 – Fig. 45 — Typical Refrigerant Circuiting
  • Page 49 – There; Table 20 — Control Board LED Alarms
  • Page 50 – Tables 21-23 show the input and output channel designations.; Table 21 — I/O Channel Designations
  • Page 54 – PACKAGED SERVICE TRAINING
  • Page 56 – GENERAL
Loading the manual

Installation, Start-Up and

Service Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS

. . . . . . . . . . . . . . . . . . 1

INSTALLATION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

Step 1 — Provide Unit Support

. . . . . . . . . . . . . . 1

• ROOF CURB
• ALTERNATE UNIT SUPPORT

Step 2 — Rig and Place Unit

. . . . . . . . . . . . . . . . . 8

• POSITIONING
• ROOF MOUNT

Step 3 — Field Fabricate Ductwork

. . . . . . . . . . . 11

Step 4 — Make Unit Duct Connections

. . . . . . . 11

Step 5 — Trap Condensate Drain

. . . . . . . . . . . . . 11

Step 6 — Controls Options

. . . . . . . . . . . . . . . . . . 12

• CONSTANT VOLUME APPLICATIONS
• VARIABLE AIR VOLUME (VAV)

APPLICATIONS

Step 7 — Make Electrical Connections

. . . . . . . 15

• POWER WIRING
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING

Step 8 — Make Outdoor-Air Inlet

Adjustments

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

• ECONOMIZER
• ECONOMIZER SETTINGS

Step 9 — Position Power Exhaust/

Barometric Relief Damper Hood

. . . . . . . . . . . . . 29

Step 10 — Install Accessories

. . . . . . . . . . . . . . . 30

START-UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32-42

SERVICE

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42-45

TROUBLESHOOTING

. . . . . . . . . . . . . . . . . . . . . . 46-51

START-UP CHECKLIST

. . . . . . . . . . . . . . . CL-1, CL-2

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment

can be hazardous due to system pressure and electrical com-
ponents. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.

Untrained personnel can perform basic maintenance func-

tions of cleaning coils and filters and replacing filters. All
other operations should be performed by trained service per-
sonnel. When working on air-conditioning equipment, ob-
serve 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 ex-
tinguishers available for all brazing operations.

Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.

IMPORTANT — READ BEFORE INSTALLING

IMPORTANT: Due to upgrades in unit control soft-
ware and hardware, units produced currently are slightly
different than original design units. The unit control
software (which has changed) is designated with a sticker
on the unit control board, chip U8 (the large chip in
the center of the board), which states the software Ver-
sion number. Version 1.0 is the original version. Ver-
sion 2.0 is the current version. Differences in instal-
lation, configuration, and start-up procedures in this
manual will be identified by Version number.

INSTALLATION

Step 1 — Provide Unit Support

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

ROOF CURB — Assemble and install accessory roof curb
in accordance with instructions shipped with the curb. Ac-
cessory roof curb and information required to field fabricate
a roof curb or horizontal adapter are shown in Fig. 1 and 2.
Install insulation, cant strips, roofing, and counter flashing
as shown. Ductwork can be secured to roof curb before unit
is set in place.

IMPORTANT: The gasketing of the unit to the roof
curb is critical for a leak-proof seal. Install gasket sup-
plied with the roof curb as shown in Fig. 1. Improp-
erly applied gasket can result in air leaks and poor unit
performance.

Curb should be level. This is necessary to permit unit drain

to function properly. Unit leveling tolerance is shown in
Fig 1 and 2. Refer to Accessory Roof Curb Installation In-
structions for additional information as required. When ac-
cessory roof curb is used, unit may be installed on class A,
B, or C roof covering material.

ALTERNATE UNIT SUPPORT — When the curb or adapter
cannot be used, support unit with sleepers using unit curb or
adapter support area. If sleepers cannot be used, support long
sides of unit (refer to Fig. 3-6) with a minimum number of
equally

spaced

4-in.

x

4-in.

pads

as

follows:

50EJ,EK,EW,EY024-034 units require 3 pads on each side;
50EJ,EK,EW,EY038-048 require 4 pads on each side. Unit
may sag if supported by corners only.

50EJ,EK,EW,EY024-048

Single-Package Rooftop Units

Electric Cooling with Electric Heat Option

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

Book 1
Tab

1b

PC 111

Catalog No. 535-006

Printed in U.S.A.

Form 50E-3SI

Pg 1

8-96

Replaces: 50E-1SI

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Summary

Page 2 - UNIT LEVELING TOLERANCES DIMENSIONS*

NOTES:1. Unless otherwise specified, all dimensions are to out- side of part. 2. Roof curb accessory is shipped disassembled.3. All roof curb parts are to be 16 ga galvanized steel.4. Dimensions are in inches. Fig. 1 — Roof Curb (Sizes 024-034) UNIT LEVELING TOLERANCES DIMENSIONS* (Degrees and Inche...

Page 5 - UNIT SIZE; VFD — Variable Frequency Drive

NOTES:1. Weights include economizer (Std) 2. Center of gravity. 3. Do not locate adjacent units with discharge facing economizer inlet. Mini- mum clearances to be: Adjacent Units: 15 8 -0 9 Top of Units: No overhangCondenser Coil: 4 8 -0 9 Economizer Side: 6 8 -0 9 Filter Access Side: 10 8 -0 9 (for...

Page 8 - Step 2 — Rig and Place Unit —; Inspect unit for trans-; ALL PANELS MUST BE IN PLACE

Step 2 — Rig and Place Unit — Inspect unit for trans- portation damage. File any claim with transportation agency.Keep unit upright, and do not drop. Use spreader bars overunit to prevent sling or cable damage. Rollers may be usedto move unit across a roof. Level by using unit frame as areference; l...

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