N80MSN/N80MSL: Installation, Start–Up, Operating and Service and Maintenance Instructions
Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.
18
A190085
Fig. 29 – Thermostat Wiring Diagrams
Notes for thermostat wiring diagrams
1. Refer to outdoor equipment Installation Instructions for additional
information and setup procedure.
2. Outdoor Air Temperature Sensor must be attached in all dual fuel
application.
3. Refer to ICP thermostat Installation Instructions for additional
information and setup procedure.
4. HUM 24VAC terminal is 24 VAC and is energized when the low
pressure switch closes during a call for heat.
5. When connecting humidifier with its own 115 VAC supply use
isolation relay between furnace and humidifier.
6. When using a humidifier on a HP installation, connect humidifier to
hot water.
VENTING
The furnace shall be connected to a listed factory built chimney or vent,
or a clay-tile lined masonry or concrete chimney. Venting into an unlined
masonry chimney or concrete chimney is prohibited.
When an existing Category I furnace is removed or replaced, the original
venting system may no longer be sized to properly vent the attached
appliances. An improperly sized Category I venting system could cause
the formation of condensate in the furnace and vent, leakage of
condensate and combustion products, and spillage of combustion
products into the living space.
Vent system or vent connectors may need to be resized. Vent systems or
vent connectors, must be sized to approach minimum size as determined
using appropriate table found in the NFGC.
General Venting Requirements
Follow all safety codes for proper vent sizing and installation
requirements, including local building codes, the current edition of
National Fuel Gas Code ANSI Z223.1/NFPA 54 (NFGC), Parts 12 and
13, the local building codes, and furnace and vent manufacturers’
instructions.
These furnaces are design-certified as Category I furnaces in accordance
with current edition of ANSI Z21.47/CSA 2.3 and operate with a
non-positive vent static pressure to minimize the potential for vent gas
leakage. Category I furnaces operate with a flue loss not less than 17
percent to minimize the potential for condensation in the venting system.
These furnaces are approved for common venting and multistory venting
with other fan assisted or draft hood equipped appliances in accordance
with the NFGC, the local building codes, and furnace and vent
manufacturers’ instructions.
The following information and warning must be considered in addition
to the requirements defined in the NFGC.
1. If a vent (common or dedicated) becomes blocked, the furnace will
be shut off by the draft safeguard switch located on the vent elbow.
2. Do not vent this Category I furnace into a single-wall dedicated or
common vent. The dedicated or common vent is considered to be
the vertical portion of the vent system that terminates outdoors.
3. Vent connectors serving Category I furnaces shall not be connected
into any portion of a mechanical draft system operating under
positive pressure.
4. Do not vent this appliance with any solid fuel burning appliance.
5. Category I furnaces must be vented vertically or nearly vertically
unless equipped with a listed power venter.
6. Do not vent this appliance into an unlined masonry chimney. (Refer
to Chimney Inspection Chart, Fig. 30).
To Next Page
Loading...
