5
D. RESIDENTIAL GARAGE, CLOSET, AND ALCOVE INSTALLATIONS .................................................................................... 15
E. EXHAUST VENT AND INTAKE PIPE ....................................................................................................................................... 15
F. PREVENT COMBUSTION AIR CONTAMINATION .................................................................................................................. 16
G. REMOVING AN EXISTING BOILER FROM AN EXISTING COMMON VENT SYSTEM ......................................................... 16
PART 4
– PREPARE BOILER ................................................................................................................................................... 17
A. REMOVE BOILER FROM PACKAGING ................................................................................................................................... 17
B. WALL MOUNTING CONSIDERATIONS ................................................................................................................................... 17
C. WALL MOUNTING INSTRUCTIONS ........................................................................................................................................ 17
PART 5
– BOILER PIPING ........................................................................................................................................................ 18
A. GENERAL PIPING INFORMATION .......................................................................................................................................... 18
B. RELIEF VALVE ......................................................................................................................................................................... 19
C. SEPARATE LOW WATER CUTOFF ........................................................................................................................................ 20
D. BACKFLOW PREVENTER ....................................................................................................................................................... 20
E. SYSTEM WATER PIPING METHODS ..................................................................................................................................... 20
F. CIRCULATORS......................................................................................................................................................................... 20
G. HYDRONIC PIPING WITH CIRCULATORS, ZONE VALVES, AND MULTIPLE BOILERS ..................................................... 21
H. CIRCULATOR SIZING .............................................................................................................................................................. 21
I. ZONING WITH ZONE VALVES.................................................................................................................................................. 22
J. ZONING WITH CIRCULATORS ................................................................................................................................................ 23
K. MULTIPLE BOILERS ................................................................................................................................................................ 23
L. FILL AND PURGE HEATING SYSTEM .................................................................................................................................... 23
M. PIPING DETAILS ..................................................................................................................................................................... 24
PART 6
– PIPING WITH OPTIONAL VISION 1 SYSTEM ......................................................................................................... 31
A. VISION 1 SYSTEM PIPING ...................................................................................................................................................... 31
B. ZONING WITH ZONE VALVES USING VISION 1 .................................................................................................................... 31
C. ZONING WITH CIRCULATORS USING VISION 1 ................................................................................................................... 31
D. PIPING DETAILS WITH THE VISION 1 SYSTEM .................................................................................................................... 32
PART 7
– VENTING, COMBUSTION AIR, AND CONDENSATE REMOVAL ........................................................................... 42
A. GENERAL ................................................................................................................................................................................. 42
B. APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE PIPE .................................................................................... 42
C. REQUIREMENTS FOR INSTALLATION IN CANADA .............................................................................................................. 43
D. EXHAUST VENT AND INTAKE PIPE LOCATION.................................................................................................................... 43
1. DETERMINE EXHAUST VENT LOCATION ........................................................................................................................................................ 43
2. DETERMINE INTAKE PIPE LOCATION ............................................................................................................................................................. 44
E. EXHAUST VENT AND INTAKE PIPE SIZING .......................................................................................................................... 45
G. LONGER VENT RUNS ............................................................................................................................................................. 45
H. EXHAUST VENT AND INTAKE PIPE INSTALLATION ............................................................................................................ 46
I. DIAGRAMS FOR SIDEWALL VENTING .................................................................................................................................... 48
J. DIAGRAMS FOR VERTICAL VENTING .................................................................................................................................... 50
PART 8
– GAS PIPING .............................................................................................................................................................. 51
A. GAS CONNECTION ................................................................................................................................................................. 51
