6
LP-387 REV. 6.10.14
N. ZONING WITH CIRCULATORS ............................................................................................................................................... 32
O. MULTIPLE BOILERS ............................................................................................................................................................... 32
PART 6
– VENTING, COMBUSTION AIR, AND CONDENSATE REMOVAL ........................................................................... 33
A. GENERAL ................................................................................................................................................................................ 33
B. APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE PIPE .................................................................................... 34
C. REQUIREMENTS FOR INSTALLATION IN CANADA ............................................................................................................. 34
D. EXHAUST VENT AND INTAKE PIPE LOCATION ................................................................................................................... 35
E. EXHAUST VENT AND INTAKE PIPE SIZING .......................................................................................................................... 39
F. EXHAUST VENT AND INTAKE PIPE INSTALLATION ............................................................................................................ 40
G. DIAGRAMS FOR SIDEWALL VENTING .................................................................................................................................. 41
H. DIAGRAM FOR HORIZONTAL VENTING ............................................................................................................................... 43
I. DIAGRAM FOR UNBALANCED FLUE / VERTICAL VENT ....................................................................................................... 44
J. DIAGRAM FOR VERTICAL VENTING ...................................................................................................................................... 45
K. VENTING THROUGH AN EXISTING SYSTEM ....................................................................................................................... 46
1. CONCENTRIC VENTING .................................................................................................................................................................................. 46
2. VENTING AS A CHASE .................................................................................................................................................................................... 47
L. INDOOR COMBUSTION AIR INSTALLATION IN CONFINED OR UNCONFINED SPACE ..................................................... 48
PART 7
– GAS PIPING .............................................................................................................................................................. 50
A. GAS CONNECTION ................................................................................................................................................................. 50
B. GAS PIPING ............................................................................................................................................................................. 50
C. CHECK INLET GAS PRESSURE............................................................................................................................................. 51
D. BOILER GAS VALVE ............................................................................................................................................................... 52
PART 8
– FIELD WIRING .......................................................................................................................................................... 53
A. INSTALLATION MUST COMPLY WITH: .................................................................................................................................. 53
B. FIELD WIRING TERMINATIONS ............................................................................................................................................. 53
C. FIELD WIRING ......................................................................................................................................................................... 53
D. LINE VOLTAGE WIRING FOR STANDARD BOILER .............................................................................................................. 54
E. ALARM CONNECTIONS .......................................................................................................................................................... 54
F. LOW VOLTAGE CONNECTIONS FOR STANDARD BOILER ................................................................................................. 54
G. THERMOSTAT ........................................................................................................................................................................ 54
H. OUTDOOR SENSOR ............................................................................................................................................................... 55
I. INDIRECT SENSOR .................................................................................................................................................................. 55
J. OPTIONAL 0-10 VOLT BUILDING CONTROL SIGNAL ........................................................................................................... 55
K. OPTIONAL UL353 LOW WATER CUT-OFF INTERFACE KIT ................................................................................................ 56
L. WIRING OF CASCADE SYSTEM COMMUNICATION BUS .................................................................................................... 56
M. CASCADE MASTER PUMP AND SENSOR WIRING.............................................................................................................. 57
N. CASCADE FOLLOWER PUMP AND SENSOR WIRING ......................................................................................................... 57
PART 9
– START-UP PREPARATION...................................................................................................................................... 60
A. CHECK / CONTROL WATER CHEMISTRY ............................................................................................................................. 60
B. CHECK FOR GAS LEAKS ....................................................................................................................................................... 61
C. FREEZE PROTECTION (WHEN USED) .................................................................................................................................. 61
