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LP- 428 REV. 9.2.14

F. PREVENT COMBUSTION AIR CONTAMINATION .................................................................................................................. 14

G. REMOVING A BOILER FROM A COMMON VENT SYSTEM .................................................................................................. 15

H. UNCRATING AND MOVING BOILER ...................................................................................................................................... 15

PART 4 – BOILER PIPING ........................................................................................................................................................ 15

A. GENERAL PIPING INFORMATION .......................................................................................................................................... 16

B. RELIEF VALVE ......................................................................................................................................................................... 16

C. BACKFLOW PREVENTER ....................................................................................................................................................... 16

D. SYSTEM WATER PIPING METHODS ..................................................................................................................................... 17

E. CIRCULATORS ........................................................................................................................................................................ 17

F. HYDRONIC PIPING WITH CIRCULATORS, ZONE VALVES, AND MULTIPLE BOILERS ...................................................... 17

G. CIRCULATOR SIZING ............................................................................................................................................................. 18

H. FILL AND PURGE HEATING SYSTEM .................................................................................................................................... 20

I. FREEZE PROTECTION FLUIDS ............................................................................................................................................... 20

J. ZONING WITH ZONE VALVES ................................................................................................................................................. 21

K. ZONING WITH CIRCULATORS ............................................................................................................................................... 21

L. MULTIPLE BOILERS ................................................................................................................................................................ 21

M. BOILER PIPING DETAILS ....................................................................................................................................................... 22

PART 5 – VENTING, COMBUSTION AIR AND CONDENSATE REMOVAL............................................................................ 26

A. GENERAL ................................................................................................................................................................................. 26

B. APPROVED MATERIALS FOR EXHAUST VENT AND INTAKE PIPE .................................................................................... 26

D. REQUIREMENTS FOR INSTALLATION IN CANADA .............................................................................................................. 27

E. EXHAUST VENT AND INTAKE PIPE LOCATION .................................................................................................................... 28

F. EXHAUST VENT AND INTAKE PIPE SIZING .......................................................................................................................... 31

G. EXHAUST VENT AND INTAKE PIPE INSTALLATION ............................................................................................................ 31

H. BOILER REMOVAL FROM A COMMON VENT SYSTEM ....................................................................................................... 32

I. VENTING DRAWINGS ............................................................................................................................................................... 32

1. DIRECT VENT INSTALLATION OF EXHAUST VENT AND INTAKE PIPE ................................................................................ 32

2. ROOM AIR, INDOOR COMBUSTION, AND VENTILATION AIR INSTALLATION REQUIREMENTS ....................................... 36

PART 6 – GAS PIPING .............................................................................................................................................................. 37

A. GAS CONNECTION ................................................................................................................................................................. 37

B. GAS PIPING ............................................................................................................................................................................. 38

C. GAS TABLE .............................................................................................................................................................................. 38

D. CHECK INLET GAS PRESSURE ............................................................................................................................................. 39

E. GAS VALVE .............................................................................................................................................................................. 40

PART 7 – FIELD WIRING .......................................................................................................................................................... 42

A. INSTALLATION MUST COMPLY WITH: .................................................................................................................................. 42

B. FIELD WIRING.......................................................................................................................................................................... 42

C. LINE VOLTAGE WIRING FOR STANDARD BOILER .............................................................................................................. 42

D. ALARM CONNECTIONS (TOP BOILER CONNECTION) ........................................................................................................ 42

E. LOW VOLTAGE CONNECTIONS............................................................................................................................................. 43

F. THERMOSTAT.......................................................................................................................................................................... 43

Brand	HTP
Model	MODCON1000
Category	Boiler
Language	English

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