Allied A80UH1EX - User Manual

508031-02 Issue 2135 Page 1 of 29
SERVICE MANUAL
A80UH1EX & 80G1UHEX Gas Furnace
(P) 508031-02
*P508031-02*
Table of Contents
Technical Specications ..............................................2
Blower Performance ....................................................3
Parts Arrangement.......................................................5
Unit Components .........................................................6
Placement and Installation ........................................16
Start-Up .....................................................................16
Heating System Service Checks ...............................16
Typical Operating Characteristics ..............................20
Maintenance ..............................................................21
Wiring and Sequence of Operation ...........................24
Troubleshooting: Heating Sequence of Operation ....26
Troubleshooting: Cooling Sequence of Operation ..... 28
Troubleshooting: Continuous Fan Sequence of
Operation ...................................................................29
A80UH1EX & 80G1UHEX series units are mid-e󰀩ciency
gas furnaces used for upow or horizontal applications
only, manufactured with heat exchangers formed of
aluminized steel. A80UH1EX & 80G1UHEX units are
available in heating capacities of 40,000 to 100,000 Btuh
and cooling applications 2 to 5 tons. Refer to Engineering
Handbook for proper sizing.
A80UH1EX & 80G1UHEX model units are equipped with a
hot surface ignition system. The A80UH1EX & 80G1UHEX
units meet the new California 14 ng/J Nitrogen Oxides
(NOx) Standards and California Seasonal E󰀩ciency
requirements. All units use a redundant gas valve to assure
safety shut-o󰀨 as required by C.S.A.
All specications in this manual are subject to change.
Procedures outlined in this manual are presented as a
recommendation only and do not supersede or replace
local or state codes. In the absence of local or state codes,
the guidelines and procedures outlined in this manual
(except where noted) are recommended only and do not
constitute code.
This is a safety alert symbol and should never be ignored. When you see this symbol on labels or in manuals, be alert to
the potential for personal injury or death.
Electric shock hazard.
Can cause injury or death. Before attempting
to perform any service or maintenance,
turn the electrical power to unit OFF at
disconnect switch(es). Unit may have
multiple power supplies.
WARNING
As with any mechanical equipment, contact with sharp
sheet metal edges can result in personal injury. Take
care while handling this equipment and wear gloves
and protective clothing.
CAUTION
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, personal
injury or loss of life. Installation and service must be
performed by a licensed professional HVAC installer (or
equivalent), service agency or the gas supplier.
WARNING

Allied A80UH1EX Specifications