Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 004-816
Printed in U.S.A.
Form 48TF-C1SI
Pg 1
1-01
Replaces: New
Book 1
4
Tab
1a 6a
Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS
. . . . . . . . . . . . . . . . . . . . . . 1
INSTALLATION
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33
Step 1 — Provide Unit Support
. . . . . . . . . . . . . . . . . . . 1
• ROOF CURB
• SLAB MOUNT
Step 2 — Field Fabricate Ductwork
. . . . . . . . . . . . . . . 2
Step 3 — Install External Trap for
Condensate Drain
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Step 4 — Rig and Place Unit
. . . . . . . . . . . . . . . . . . . . . 2
• POSITIONING
Step 5 — Install Flue Hood
. . . . . . . . . . . . . . . . . . . . . . . 8
Step 6 — Install Gas Piping
. . . . . . . . . . . . . . . . . . . . . . 8
Step 7 — Make Electrical Connection
. . . . . . . . . . . . 8
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• HEAT ANTICIPATOR SETTINGS
Step 8 — Adjust Factory-Installed Options
. . . . . . 11
• APOLLO CONTROL
• MANUAL OUTDOOR-AIR DAMPER
• OPTIONAL DURABLADE ECONOMIZER
• OPTIONAL ECONOMI$ER
Step 9 — Adjust Evaporator-Fan Speed
. . . . . . . . . 20
START-UP
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34-36
SERVICE
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36-41
TROUBLESHOOTING
. . . . . . . . . . . . . . . . . . . . . . . . . 42-46
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 extinguishers available for all brazing operations.
INSTALLATION
Unit is shipped in the vertical discharge configuration. To
convert to horizontal configuration, remove screws from side
duct opening covers and remove covers. Using the same
screws, install covers on vertical duct openings with the insula-
tion side down. Seals around duct openings must be tight. See
Fig. 1.
Step 1 — Provide Unit Support
ROOF CURB — Assemble and install accessory roof curb in
accordance with instructions shipped with curb. See Fig. 2. In-
stall insulation, cant strips, roofing felt, and counter flashing as
shown. Ductwork must be attached to curb. If gas, electric
power or control power is to be routed through the curb, attach
the accessory thru-the-curb service connection plates to the
roof curb in accordance with the accessory installation instruc-
tions. Connection plates must be installed before unit is set in
roof curb.
Curb should be level. Unit leveling tolerances are shown in
Fig. 3. This is necessary for unit drain to function properly. Re-
fer to Accessory Roof Curb Installation Instructions for addi-
tional information as required.
Disconnect gas piping from unit when leak test-
ing at pressure greater than 3.4 kPa (
1
/
2
psig).
Pressures greater than 3.4 kPa (
1
/
2
psig) will
cause gas valve damage resulting in hazardous
condition. If gas valve is ever subjected to pres-
sure greater than 3.4 kPa (
1
/
2
psig), it must be
replaced before use. When pressure testing
field-supplied gas piping at pressures of 3.4 kPa
(
1
/
2
psig) or less, a unit connected to such piping
must be isolated by manually closing the gas
valve(s).
Before performing service or maintenance operations on
unit, turn off main power switch to unit. Electrical shock
could cause personal injury.
IMPORTANT: The gasketing of the unit to the roof curb
is critical for a watertight seal. Install gasket supplied
with the roof curb as shown in Fig. 2. Improperly
applied gasket can also result in air leaks and poor unit
performance.
48TFD008-014
48TFE008-014
48TFF008,012
Single-Package Rooftop Heating/Cooling Units
50 Hz
