Carrier 50TJ016-028 Installation, Start-Up And Service Instructions Manual

CONTENTS
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11
Step 1 - Provide Unit Support . . . . . . . . . . . . . . . 1
• ROOF CURB
• ALTERNATE UNIT SUPPORT
Step 2 - Rig and Place Unit . . . . . . . . . . . . . . . . . . 1
• POSITIONING
• ROOF MOUNT
Step 3 - Field Fabricate Ductwork . . . . . . . . . . . . 8
Step 4 - Make Unit Duct Connections . . . . . . . . 8
Step 5 - Trap Condensate Drain . . . . . . . . . . . . . 8
Step 6 - Make Electrical Connections . . . . . . . . 8
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
Step 7 - Make Outdoor-Air Inlet
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
• MANUAL OUTDOOR-AIR DAMPER
• OPTIONAL ECONOMIZER
Step 8 - Install Outdoor-Air Hood . . . . . . . . . . . 11
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-17
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-22
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . CL-1
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.
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 Catalog No. 005-072
Tab 1b
Installation, Start-Up and
Service Instructions
Page
Printed in U.S.A.
Single-Package Rooftop Units
INSTALLATION
Step 1 - Provide Unit Support
ROOF CURB - Assemble and install accessory roof curb
or horizontal adapter in accordance with instructions shipped
with the curb or adapter. Accessory roof curb and horizontal
adapter and information required to field fabricate a roof curb
or horizontal adapter are shown in Fig. 1. Install insulation,
cant strips, roofing felt, and counter flashing as shown. Duct-
work can be secured to roof curb or horizontal adapter be-
fore unit is set in place.
IMPORTANT: The gasketing of the unit to the roof
curb or horizontal adapter is critical for a watertight
seal. Install gasket supplied with the roof curb or hori-
zontal adapter as shown in Fig. 1. Improperly applied
gasket can result in air leaks and poor unit
performance.
Curb or adapter should be level. This is necessary to per-
mit unit drain to function properly. Unit leveling tolerance is
± 5 mm per linear m (±
Refer to Accessory Roof Curb or Horizontal Adapter Instal-
lation Instructions for additional information as required.
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 with a minimum of 3 equally-spaced 100 mm
× 100 mm (4 in. × 4 in.) pads on each side.
Step 2 - Rig and Place Unit -
portation damage. File any claim with transportation agency.
Keep unit upright, and do not drop. Use bumper boards for
spreader bars over unit to prevent sling or cable damage.
Rollers may be used to move unit across a roof. Level by
using unit frame as a reference; leveling tolerance is ± 5 mm
per linear m (± 1 ⁄ in. per linear ft) in any direction. See
16
Fig. 2 for additional information. Unit weight is shown in
Tables 1A and 1B.
Four lifting holes are provided in ends of unit base rails
as shown in Fig. 2-4. Refer to rigging instructions on unit.
POSITIONING - Provide clearance around and above unit
for airflow, safety, and service access (Fig. 3 and 4).
Do not install unit in an indoor location. Do not locate air
inlets near exhaust vents or other sources of contaminated
air.
Although unit is weatherproof, guard against water from
higher level runoff and overhangs.
ROOF MOUNT - Check building codes for weight distri-
bution requirements.
Form 50TJ-C8SI Pg 1
50TJ016-028
50 Hz
1 ⁄ in. per linear ft) in any direction.
16
Inspect unit for trans-
5-96 Replaces: 50TJ-C4SI