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CONTENTS
Installation Manual
SPECIFICATIONS
.............................................4
INTRODUCTION ..........................................5
SAFETY GUIDELINES
.....................................6
SAFETY DEFINITION ....................................6
GENERAL ......................................................6
INSTALLATION
................................................7
GENERAL ......................................................7
CLEARANCES ...............................................9
INCLUDED ACCESSORIES ............................9
OPTIONAL ITEMS ........................................9
WARNING FOR INSTALLATIONS ...............11
HIGH-ALTITUDE INSTALLATIONS
.............12
VENTING INSTRUCTIONS .........................13
General .....................................................13
Combustion Air Supply .............................15
Vent length and No. of Elbows .................19
DIP switch settings for Vent length ..........20
Clearances for sidewall terminations .......23
Clearances for rooftop terminations ........24
Vent termination clearances ....................25
GAS SUPPLY AND GAS PIPE SIZING .........26
General .....................................................26
Gas connections .......................................26
Natural Gas Supply Piping ........................27
Propane (LP) Supply Piping .......................27
WATER CONNECTIONS .............................28
Pressure relief valve .................................28
ELECTRICAL CONNECTIONS .....................29
TEMPERATURE REMOTE CONTROLLER .....30
Included accessories .................................30
Installation ................................................30
EASY-LINK SYSTEM
.........................................32
Easy link connection procedures ..............32
MULTI-UNIT SYSTEM
......................................34
APPLICATIONS
..............................................35
SPACE HEATING APPLICATIONS ...............35
RECIRCULATION ........................................35
DUAL-PURPOSE HOT WATER HEATING
......36
INITIAL OPERATION
.....................................37
Owner's Guide
OPERATING SAFETY
.....................................39
NORMAL OPERATION
..................................41
BUILT-IN CONTROLLER
AND REMOTE CONTROLLER ..................41
GENERAL ....................................................41
TEMPERATURE SETTINGS ........................42
TEMPERATURE SETTINGS ON THE PCB ........44
FLOW .......................................................... 44
FREEZE PROTECTION SYSTEM .................45
MAINTENANCE AND SERVICE .................45
Measuring inlet gas pressure ...................46
UNIT DRAINING AND FILTER CLEANING .......46
TROUBLESHOOTING
.....................................47
GENERAL ....................................................47
ERROR CODES ...........................................49
COMPONENTS DIAGRAM
............................53
PARTS LIST
....................................................57
OUTPUT TEMPERATURE CHART
..................60
Contents