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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500019-01 Printed in U.S.A. Form 50TFQ-9SI Pg 1 9-05 Replaces: 50TFQ-7SI
Book 1 4
Tab 5a 5a
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS .........................1
INSTALLATION ...................................1-43
Step 1— Provide Unit Support.......................1
• ROOF CURB
• SLAB MOUNT
• ALTERNATE UNIT SUPPORT
Step 2 — Field Fabricate Ductwork ..................3
Step 3 — Install Condensate Drain Line
and External Trap .................................3
Step 4 — Rig and Place Unit.........................3
• POSITIONING
Step 5 — Make Electrical Connections ..............7
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• DEFROST BOARD
• HEAT ANTICIPATOR SETTINGS
Step 6 — Adjust Factory-Installed Options .........12
• DISCONNECT SWITCH
• CONVENIENCE OUTLET
• NOVAR CONTROLS
• MANUAL OUTDOOR-AIR DAMPER
• PREMIERLINK™ CONTROL
• OPTIONAL ECONOMI$ER IV AND ECONOMI$ER2
• ECONOMI$ER IV STANDARD SENSORS
• ECONOMI$ER IV CONTROL MODES
Step 7 — Adjust Indoor-Fan Speed .................25
PRE-START-UP .....................................44
START-UP .......................................44-47
SERVICE ........................................47-49
TROUBLESHOOTING............................49-53
INDEX ..............................................54
START-UP CHECKLIST ..........................CL-1
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 basic maintenance func-
tions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precau-
tions 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 extinguisher available for all brazing operations.
INSTALLATION
Unit is shipped in the vertical configuration. To convert to
horizontal configuration, remove side duct opening covers. Us-
ing the same screws, install covers on vertical duct openings
with the insulation-side down. Seals around duct openings
must be tight.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install the accessory roof curb
in accordance with instructions shipped with the curb. See
Fig. 1. Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb. If
electric or control power will be routed through the basepan,
use the proper accessory kit listed in Fig. 1, available from your
local distributor. Attach the accessory thru-the-bottom service
connections to the basepan in accordance with the accessory
installation instructions. Connections must be installed before
the unit is set on the roof curb.
The roof curb should be level. Unit leveling tolerances are
shown in Fig. 2. This is necessary for the unit drain to function
properly. Refer to Accessory Roof Curb Installation Instruc-
tions for additional information as required.
Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lockout
tag. Ensure voltage listed on unit data plate agrees with
electrical supply provided for the unit. Electrical shock
could cause personal injury.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a water-tight seal. Install gasket supplied with
the roof curb as shown in Fig. 1. Improperly applied gasket
can also result in air leaks and poor unit performance.
50TFQ008-012
Single-Package Rooftop
Heat Pump Units