Installation Guide

ManualsBrandsKelvinator ManualsHeating, Ventilation, and Air Conditioning95% AFUE 72,000 BTU Upflow/Horizontal Residential Gas Furnace

TABLE OF CONTENTS

IMPORTANT SAFETY INFORMATION ..................... 3

CODES & REQUIREMENTS ..................................... 4

Combustion Air Quality............................................ 5

Heating Load ........................................................... 5

Operation of Furnace During Construction ............. 6

Installation in a Garage............................................ 6

Clearances to Combustible Materials...................... 6

COMBUSTION AIR & VENTING REQUIREMENTS . 7

Direct Vent Furnaces ............................................... 8

Conventional Vent Systems - Conﬁned Spaces ...... 8

Air From Inside ..................................................... 9

Outdoor Air from a Crawl Space or Vented Attic .. 9

Outdoor Air Using Vertical Ducts .......................... 9

Outdoor Air Using Horizontal Ducts ..................... 9

Air Directly Through An Exterior Wall ................... 9

Alternate Method of Providing Air from Outside ... 10

Conventional Vent Systems - Unconﬁned Spaces .. 10

Category IV Venting ................................................ 10

Vent Pipe Material ................................................ 11

Vent Pipe Length & Diameter ............................... 11

Vent Pipe Installation ............................................ 12

Outdoor Terminations - Horizontal Venting ........... 12

Outdoor Terminations - Vertical Venting ............... 13

Vent Freezing Protection ...................................... 13

Existing Installations ............................................ 14

Condensate Disposal .............................................. 14

CIRCULATING AIR REQUIREMENTS ...................... 14

Plenums & Air Ducts................................................ 14

Return Air Connections ........................................... 15

Upﬂow & Horizontal Furnaces ............................. 15

Downﬂow Furnaces ............................................. 15

Supply Air Connections ........................................... 15

Acoustical Treatments ............................................. 15

FURNACE INSTALLATION ....................................... 16

General Requirements ............................................ 16

Upﬂow Furnaces ...................................................... 16

Horizontal Furnaces ................................................ 16

Special Instructions for SC038-23A Furnaces ..... 16

Downﬂow Furnaces ................................................. 17

Installation on a Concrete Slab ............................ 17

Inducer & Venting Options ....................................... 18

Inducer Assembly Rotation .................................. 18

Pressure Switch Tubing ........................................ 18

Alternate Pressure Switch Location ..................... 18

Accessories ............................................................. 20

Finish Flange ....................................................... 20

Rubber Grommets................................................ 20

PVC Components ................................................ 21

Typical Orientation ........................................... 21

Alternate Orientation ........................................ 21

Optional PVC Pipe Installation ............................. 21

Condensate Drain Lines....................................... 21

Bottom Panel Removal ............................................ 22

Alternate Bottom Panel Removal ............................ 22

GAS SUPPLY & PIPING ............................................ 23

Leak Check .............................................................. 23

High Altitude Application (Natural Gas Only) .......... 24

Converting from Natural Gas to LP / Propane ......... 27

ELECTRICAL WIRING ............................................... 27

Line Voltage Wiring ................................................. 28

Grounding ................................................................ 28

Thermostat / Low Voltage Connections .................. 29

Heat Anticipator ....................................................... 29

Twinning................................................................... 29

START-UP&ADJUSTMENTS ................................... 30

Pre-Start Check List ................................................ 30

Start-up Procedures ................................................ 30

Verifying & Adjusting Input Rate .............................. 30

Verifying & Adjusting Temperature Rise .................. 31

Verifying Burner Operation ...................................... 31

Verifying Operation of the Supply Air Limit Switch .. 31

OPERATING SEQUENCE ......................................... 31

Heating Cycle .......................................................... 31

Cooling Cycle .......................................................... 31

Fan Mode ................................................................ 31

MAINTENANCE ......................................................... 32