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CONTENTS
Page
SAFETY CONSIDERATIONS ...................... 1
INSTALLATION ................................ 2-20
I. Provide Unit Support ...................... 2
II. Rig and Place Unit ........................ 2
III. Field Fabricate Ductwork ................... 7
IV. Unit Duct Connections ..................... 7
V. Flue Hood ................................ 8
VI. Trap Condensate Drain ..................... 8
VII. Gas Piping ............................... 8
VIII. Electrical Connections ..................... 9
IX. Outdoor-Air Inlet Assembly ................ 14
X. Power Exhaust/Barometric Relief
Damper Hood ........................... 18
XI. Accessories ............................ 19
PRE-START-UP ................................20,21
START-UP ....................................21-28
I. Cooling Section Start-Up and
Adjustments ............................ 21
II. Heating Section Start-Up and
Adjustments ............................ 22
III. Field Test Operation ...................... 24
IV. Indoor Airflow and Airflow
Adjustments ............................ 24
V. Gas Valve Adjustment .................... 25
VI. Main Burners ........................... 28
VII. Power Exhaust Operation .................. 28
VIII. Head Pressure Control ................... 28
IX. Low Ambient Kit ......................... 28
CARE AND MAINTENANCE ..................... 28
SERVICE .....................................29-32
I. Cleaning ............................... 29
II. Lubrication ............................. 29
III. Evaporator Fan Service and
Replacement ............................ 31
IV. Evaporator-Fan Motor Replacement ........ 31
V. Power Failure ........................... 31
VI. Refrigerant Charge ....................... 31
VII. Filter Drier .............................. 32
VIII. Thermostatic Expansion Valve (TXV) ........ 32
IX. Protective Devices ....................... 32
X. Relief Devices ........................... 32
XI. Control Circuits ......................... 32
XII. Compressor Lockout Logic ............... 32
XIII. Replacement Parts ....................... 32
TROUBLESHOOTING ...........................33-41
I. Diagnostic LEDs ......................... 33
II. Error Code Summary ..................... 34
III. Input/Output Channel Designations ......... 34
START-UP CHECKLIST ....................CL-1, CL-2
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 pre-
cautions 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.
WARNING:
Before performing service or mainte-
nance operations on unit, turn off main power switch
to unit. Electrical shock could cause personal injury.
WARNING:
1. Improper installation, adjustment, alteration, serv-
ice, or maintenance can cause property damage, per-
sonal 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. Pres-
sures greater than 0.5 psig will cause gas valve dam-
age 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
580G,H
Sizes 240-360
Cancels: II 580G,H-240-1 II 580G,H-240-2
11/1/97