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Cancels: II 581A-155-2 II 581A-155-3
6/15/99
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . .1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14
I. Step 1 — Provide Unit Support. . . . . . . . . . . . . .1
II. Step 2 — Rig and Place Unit . . . . . . . . . . . . . . . .3
III. Step 3 — Field Fabricate Ductwork. . . . . . . . . . .7
IV. Step 4 — Make Unit Duct Connections . . . . . . .7
V. Step 5 — Install Flue Hood and Wind
Baffle . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .7
VI. Step 6 — Trap Condensate Drain . . . . . . . . . . . .8
VII. Step 7 — Install Gas Piping. . . . . . . . . . . . . . . . .8
VIII. Step 8 — Make Electrical Connections . . . . . . .8
IX. Step 9 — Make Outdoor-Air Inlet
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
X. Step 10 — Install Outdoor-Air Hood. . . . . . . . .11
XI. Step 11 — Install All Accessories. . . . . . . . . . .13
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14-25
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25-34
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 35-37
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 the basic maintenance
functions 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 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
extinguishers available for all brazing operations.
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.
INSTALLATION
I. STEP 1 — PROVIDE UNIT SUPPORT
A. Roof Curb
Assemble or install accessory roof curb or horizontal supply
roof curb in accordance with instructions shipped with this
accessory. See Fig. 1 and 2. Install insulation, cant strips,
roofing, and counter flashing as shown. Ductwork can be
installed to roof curb or horizontal supply roof curb before
unit is set in place.
(Instructions continued on page 3.)
WARNING: Before performing service or mainte-
nance operations on unit, turn off mail power switch to
unit. electrical shock could cause personal injury.
WARNING:
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
neighbor’s phone. Follow the gas supplier’s
instructions.
4. If you cannot reach your gas supplier, call the
fire department.
WARNING: 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 clos-
ing the manual gas valve(s).
installation, start-up and
service instructions
SINGLE PACKAGE ROOFTOP
ELECTRIC COOLING/GAS HEATING UNITS
581A
Sizes 155-240