Installation Instructions

11
VENTING INSTRUCTIONS
GENERAL
• Improper venting of this appliance can result in excessive levels of carbon
monoxide which can result in severe personal injury or death.
• Improper installation can cause nausea or asphyxiation, severe injury or death
from carbon monoxide and ue gases poisoning. Improper installation will
void product warranty.
When installing the vent system, all applicable national and local codes must be
followed. If you install thimbles, re stops or other protective devices and they
penetrate any combustible or noncombustible construction, be sure to follow all
applicable national and local codes.
This appliance must be vented in accordance with the section” Venting of Equipment” of the current
edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the United States and/or Section 8 of
the B149.1 Natural Gas and Propane Installation Code in Canada, as well as applicable local building
codes. The use of venting materials approved for Category III/IV appliances is recommended when-
ever possible. However, this appliance may also be vented with plastic pipe materials such as ABS,
PVC (solid core), CPVC (solid core), or polypropylene. For details, please refer toe the Exhaust
Vent (ABS, PVC, CPVC, or Polypropylene Vent) Section. Vent installations in Canada which utilize
plastic vent systems must use venting that complies with ULC S636.
General rules for venting micro boilers are:
General rules for vent terminations:
• Place the micro boiler as close as possible to the vent termination.
• The vent collar of the micro boiler must be fastened directly to an unobstructed vent pipe.
• Do not weld the vent pipe to the micro boiler’s vent collar.
• Do not cut the vent collar of the unit.
• The vent must be easily removable from the top of the boiler for normal service and inspection of
the unit.
• The micro boiler vent must not be connected to any other gas appliance or vent stack except an
approved common venting system.
• Avoid using an oversized vent pope or using extremely long runs of the pope unless it is part of an
approved common vent system.
• For rooftop venting, a rain cap or other from of termination that prevents rain water from entering
into the micro boiler must be installed.
• Do not terminate vent into chimney. If the vent must go through the chimney, the vent must run all
the way through the chimney with approved vent pipe.
• Avoid locating the micro boiler vent termination near any air intake devices. These fans can pick
up the exhaust ue products from the micro boiler and return them to the building. This can create
a health hazard.
• Locate the vent termination so that it cannot be blocked by any debris, at any time. Most codes re-
quire that the termination be at least 12 in. (305 mm) above grade, but the installer may determine
if it should be higher depending on the job site condition and applicable codes.
• A proper sidewall termination is recommended when the micro boiler is vented through a sidewall.
• Be sure to check the clearance form the exhaust termination to the air inlet or opening in the vent
termination clearances section.
DANGER
CAUTION