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TABLE OF CONTENTS INTRODUCTION ............................................................................. 3
BOILER RATINGS AND CAPACITIES .................................................................................. 4
RULES FOR SAFE INSTALLATION AND OPERATION....................................................... 7
BEFORE INSTALLING THE BOILER .................................................................................... 7
A. codes ............................................................................................................................... 7
B. boiler sizing ...................................................................................................................... 8
C. considerations for boiler location ..................................................................................... 8
D. locating the boiler ............................................................................................................ 8
E. combustion air and vent pipe requirements ..................................................................... 9
F. condensate drain requirements...................................................................................... 10
G. foundation requirements ................................................................................................ 11
H. removing existing boiler from common venting system ................................................. 11
PLACING THE BOILER ....................................................................................................... 11
NEAR BOILER PIPING ........................................................................................................ 12
A. supply and return lines................................................................................................... 12
B. pressure relief valve ....................................................................................................... 16
C. expansion tank and make-up water ............................................................................... 16
D. condensate drain piping ................................................................................................ 19
E. filling condensate trap .................................................................................................... 19
F. chilled water piping ........................................................................................................ 20
COMBUSTION AIR AND VENT PIPE .................................................................................. 21
A. connections and terminations ........................................................................................ 21
B. installation ...................................................................................................................... 22
GAS SUPPLY PIPING .......................................................................................................... 25
A. check gas supply ........................................................................................................... 25
B. connecting the gas piping .............................................................................................. 25
C. checking the gas piping ................................................................................................. 26
ELECTRICAL WIRING ......................................................................................................... 27
A. electric power supply ..................................................................................................... 27
B. install your thermostat.................................................................................................... 28
C. field wiring connections ................................................................................................. 29
D. schematic wiring diagram .............................................................................................. 30
E. ladder wiring diagram..................................................................................................... 31
CONTROLS AND ACCESSORIES ...................................................................................... 32
A. UT 1013-10 integrated boiler control ............................................................................ 32
B. gas control valve ............................................................................................................32
C. hot surface igniter ..........................................................................................................32
D. L4006A high limit aquastat control ................................................................................ 32
E. draft inducer temperature safety switch ......................................................................... 32
F. casting temperature safety switch .................................................................................. 33
G. differential pressure air proving switch .......................................................................... 33