Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53480016-01 Printed in U.S.A. Form 48TM-4SI Pg 1 3-06 Replaces: 48TM-3SI
Book 1 4
Tab 1a 6a
Installation, Start-Up and Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
........................1
INSTALLATION ..................................2-32
Step 1 — Provide Unit Support.....................2
• ROOF CURB
• ALTERNATE UNIT SUPPORT
Step 2 — Rig and Place Unit .......................2
• POSITIONING
• ROOF MOUNT
Step 3 — Field Fabricate Ductwork
...............11
Step 4 — Make Unit Duct Connections ...........11
Step 5 — Install Flue Hood and Wind Baffle ......11
Step 6 — Trap Condensate Drain .................11
Step 7 — Orifice Change ..........................12
Step 8 — Install Gas Piping .......................13
Step 9 — Make Electrical Connections ...........13
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• OPTIONAL NON-FUSED DISCONNECT
• OPTIONAL CONVENIENCE OUTLET
Step 10 — Make Outdoor-Air Inlet
Adjustments
.....................................16
• MANUAL OUTDOOR-AIR DAMPER
Step 11 — Install Outdoor-Air Hood
..............16
Step 12 — Install All Accessories ...............17
• MOTORMASTER® I CONTROL INSTALLATION
• MOTORMASTER V CONTROL INSTALLATION
Step 13 — Adjust Factory-Installed Options .....19
• PREMIERLINK™ CONTROL
• ENTHALPY SWITCH/RECEIVER
• OUTDOOR ENTHALPY CONTROL
• DIFFERENTIAL ENTHALPY CONTROL
• OPTIONAL ECONOMI$ERIV AND ECONOMI$ER2
• ECONOMI$ERIV STANDARD SENSORS
• ECONOMI$ERIV CONTROL MODES
Step 14 — Install Humidistat for
Optional MoistureMi$er™ Package............31
START-UP .................................... 33-43
SERVICE ..................................... 43-50
TROUBLESHOOTING......................... 51-56
INDEX ...........................................57
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 in-
stall, 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 extinguishers 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.
1. Improper installation, adjustment, alteration, service,
or maintenance can cause property damage, personal
injury, or loss of life. Refer to the User’s Information
Manual provided with this unit for more details.
2. Do not store or use gasoline or other flammable
vapors and liquids in the vicinity of this or any other
appliance.
What to do if you smell gas:
1. DO NOT try to light any appliance.
2. DO NOT touch any electrical switch, or use any
phone in your building.
3. IMMEDIATELY call your gas supplier from a neigh-
bor’s phone. Follow the gas supplier’s instructions.
4. If you cannot reach your gas supplier, call the fire
department.
Disconnect gas piping from unit when pressure testing at
pressure greater than 0.5 psig. Pressures greater than
0.5 psig will cause gas valve damage resulting in hazardous
condition. If gas valve is subjected to pressure greater than
0.5 psig, it must be replaced before use. When pressure
testing field-supplied gas piping at pressures of 0.5 psig or
less, a unit connected to such piping must be isolated by
closing the manual gas valve(s).
IMPORTANT: Units have high ambient operating limits. If
limits are exceeded, the units will automatically lock the
compressor out of operation. Manual reset will be required
to restart the compressor.
48TM016-028
Single-Package Rooftop Units
Electric Cooling/Gas Heating
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