G. FREEZE PROTECTION FLUIDS ............................................................................................................................................. 11
H. HIGH ELEVATION INSTALLATIONS....................................................................................................................................... 11
PART 4 - PREPARE BOILER LOCATION ............................................................................................................................... 15
A. UNCRATING THE BOILER ...................................................................................................................................................... 15
B. BEFORE LOCATING THE BOILER ......................................................................................................................................... 15
C. LEVELING ................................................................................................................................................................................ 16
D. CLEARANCES FOR SERVICE ACCESS ................................................................................................................................ 17
F. EXHAUST VENT AND INTAKE PIPE ....................................................................................................................................... 18
I. WALL-MOUNTING THE BOILER .............................................................................................................................................. 19
PART 5 - VENTING ................................................................................................................................................................... 20
B. APPROVED VENT MATERIALS .............................................................................................................................................. 22
C. ALLOWED COMBINED VENT LENGTHS ............................................................................................................................... 22
E. VENT TERMINATION .............................................................................................................................................................. 24
3. Snorkel Venting ......................................................................................................................................................................... 26
5. Screen Installation ..................................................................................................................................................................... 29
PART 7 - GAS PIPING .............................................................................................................................................................. 30
B. GAS PIPE SIZING TABLES ..................................................................................................................................................... 31
1. Gas Pipe Sizing .......................................................................................................................................................................... 31
2. Natural Gas Pipe Sizing ............................................................................................................................................................ 31
C. GAS CONNECTION REQUIREMENTS ................................................................................................................................... 32
PART 8 - WATER PIPING ........................................................................................................................................................ 33
B. BACKFLOW PREVENTER ....................................................................................................................................................... 34
D. CIRCULATOR SIZING ............................................................................................................................................................. 34
E. CH PRESSURE RELIEF VALVE .............................................................................................................................................. 43
5
WHL-032 REV. 6.2.16