Table Of Contents - Haier GE NF97DM Service Manual

SERVICE MANUAL
NF97DM Gas Furnace
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.
NF97DM series units are high-efficiency upflow, horizontal
right and left) gas furnaces equipped with variable capacity
gas valve, variable speed combustion air inducer and
variable speed indoor blower motor. All models are designed
only for direct vent (dual pipe) venting system. NF97DM
units are available in heating inputs from 66,000 to 110,000
Btuh (19.3 to 32.2 kW) and cooling applications from 2 to 5
tons (7.0 kW to 17.5 kW). Refer to Technical Specifications
for proper sizing.
Units are factory-equipped for use with natural gas. Kits are
available for conversion to LPG operation. All NF97DM units
meet the California Nitrogen Oxides (NOx) Standards and
California Seasonal Efficiency requirements.
All specifications in this manual are subject to change.
Procedures outlined in this manual are presented as
recommendations 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 recommendations only and do not
constitute code.
WARNING
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.
CAUTION
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.

Table of Contents

Technical Specifications - NF97DM .............................3
Parts Arrangement.......................................................6
Unit Components .........................................................7
Configuring Unit Size Codes .....................................15
Placement and Installation ........................................31
Joint Cementing Procedure .......................................32
Venting Practices .......................................................33
Vent Piping Guidelines ..............................................35
For the Province of Ontario, Horizontal
Sidewall Vent Applications Only ................................44
Addendum for All Provinces of Canada .....................44
Condensate Piping ....................................................45
Start-Up .....................................................................49
Heating System Service Checks ...............................50
Typical Operating Characteristics ..............................54
Maintenance ..............................................................55
Wiring and Sequence of Operation ...........................58
Field Wiring Applications with
Conventional Thermostat ..........................................61
Sequence of Operation and
Troubleshooting Flow Chart ......................................64
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.
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WARNING
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