W415-2845 / B / 11.10.20
2
IOM
IOM
TABLE OF CONTENTS
1.0 INTRODUCTION 4
2.0 SAFETY SYMBOLS AND WARNINGS 4
2.1 SAFETY RULES 6
2.2 CODES 7
3.0 FURNACE SIZING 9
3.1 MODEL INPUT AND TEMPERATURE RISE 9
4.0 LOCATION OF UNIT 10
4.1 GENERAL GUIDELINES 10
4.2 OTHER CONSIDERATIONS 10
4.3 INSTALLATION IN UPFLOW OR HORIZONTAL POSITIONS 11
4.4 AIR CONDITIONING 12
5.0 COMBUSTIBLE CLEARANCES 12
6.0 DUCTWORK 13
6.1 DUCTWORK STEPS 14
7.0 VENTING AND COMBUSTION PIPING 15
7.1 ACCEPTABLE MATERIALS IN CANADA 15
7.2 ACCEPTABLE MATERIALS IN UNITED STATES 15
7.3 VENT DRAIN OPTION 16
8.0 NON-DIRECT VENT FURNACE INSTALLATIONS USING INDOOR COMBUSTION AIR (ONE PIPE
SYSTEM) 17
8.1 DETERMINING COMBUSTION AIR 18
8.1.1 CASE 1: FURNACE LOCATED IN A UNCONFINED SPACE 18
8.1.2 CASE 2: FURNACE LOCATED IN A CONFINED SPACE 18
8.1.3 CASE 3: FURNACE LOCATED IN A CONFINED SPACE, OUTDOOR AIR FROM ATTIC OR
CRAWL SPACE 19
8.1.4 CASE 4: FURNACE LOCATED IN A CONFINED SPACE, OUTDOOR AIR DUCTED
HORIZONTALLY 19
8.1.5 CONNECTION TO FURNACE NON-DIRECT VENT 20
9.0 VENTING GUIDELINES 21
9.1 VENT TERMINATION 22
9.2 IN CANADA 23
9.3 IN UNITED STATES 23
9.4 FURNACE VENTING INSTALLATIONS 24
9.4.1 NON-DIRECT VENT INSTALLATION USING INDOOR COMBUSTION AIR (ONE PIPE SYSTEM)
24
9.4.2 DIRECT VENT INSTALLATION USING OUTDOOR COMBUSTION AIR (TWO PIPE SYSTEM) 24
9.4.3 COMBUSTION AIR 24
10.0 TERMINATIONS 25
10.1 COMBUSTION AIR 25
10.2 EXHAUST 25
10.3 CONCENTRIC VENTING KIT 25
10.4 CONCENTRIC VENT TERMINATION INSTALLATION INSTRUCTIONS 25
10.5 LOCATION 25
10.6 MULTIPLE VENTING 26
11.0 ROUTING OPTIONS 29
11.1 CONDENSATE DRAINS 29
11.2 PREPARATIONS FOR VENT AND DRAINING OPTION 30
11.3 DRAIN HOSE INSTALLATION 32
11.3.1 DRAIN PIPING 32
11.3.2 PRIMING CONDENSATE TRAP 33
11.4 ALTERNATE CONDENSATE DRAIN PIPING INSTALLATION USING 1/2” PVC OR 3/4” CPVC 34
11.5 CONDENSATE NEUTRALIZERS 34
12.0 GAS SUPPLY AND PIPING 35
12.1 GAS SUPPLY 35
12.2 GAS PIPING 35
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