Lennox G41UF?24B?045 Service Literature

Download Service literature of Lennox G41UF?24B?045 Furnace for Free or View it Online on All-Guides.com. This version of Lennox G41UF?24B?045 Manual compatible with such list of devices, as: G41UF?24B?045, G41UF?36B?070, G41UF?48C?110, G41UF?60C?110, G41UF?60D?135

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Page 1
2003 Lennox Industries Inc.
Litho U.S.A.
Corp. 0303−L2
G41UF
Service Literature
G41UF SERIES UNITS
G41UF series units are high−efficiency upflow gas fur
naces manufactured with Lennox DuralokPlust alumi
nized primary and stainless steel secondary clamshelltype
heat exchangers. G41UF units are available in heating
input capacities of 44,000 to 132,000 Btuh (12.9 to 38.6 kW)
and cooling applications from 2 through 5 tons (7.0 through
17.6 kW). Refer to Engineering Handbook for proper sizing.
Units are factory equipped for use with natural gas. A kit is
available for conversion to LPG operation. All G41UF
units are equipped with the Lennox SureLight® hot sur
face ignition system. The gas valve is redundant to as
sure safety shut−off as required by C.S.A.
The heat exchanger, burners and manifold assembly can be
removed for inspection and service. The maintenance section
gives a detailed description on how this is done.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are sub
ject to change. Procedures outlined in this manual are pre
sented as a recommendation only and do not supersede or
replace local or state codes.
Table of Contents
General 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Blower Performance Data 3. . . . . . . . . . . . . . . . . . . . . .
I−Unit Components 8. . . . . . . . . . . . . . . . . . . . . . . . . . . .
II −Placement and Installation 16. . . . . . . . . . . . . . . . . . .
III−Start−Up 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IV−Heating System Service Checks 22. . . . . . . . . . . . . .
V−Typical Operating Conditions 26. . . . . . . . . . . . . . . . .
VI−Maintenance 27. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
VII−Wiring and Sequence of Operation 30. . . . . . . . . . .
VIII−Troubleshooting 35. . . . . . . . . . . . . . . . . . . . . . . . . . .
CAUTION
As with any mechanical equipment, personal injury
can result from contact with sharp sheet metal
edges. Be careful when you handle this equipment.
WARNING
Improper installation, adjustment, alteration, service
or maintenance can cause property damage, person
al injury or loss of life. Installation and service must
be performed by a qualified installer, service agency
or the gas supplier.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at discon
nect switch(es). Unit may have multiple
power supplies.