Installation Instructions

Installation Manual
Page
10
-VENTING INSTRUCTIONS-
-GENERAL-
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.
• 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.
The micro-boiler must be vented in accordance with the section "Venting of Equipment" of the latest
edition of the National Fuel Gas Code: ANSI Z223.1/NFPA 54 in the United States and/or Section 7
of the CAN/CSA 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 whenever
possible. However, the micro-boiler may also be vented with plastic pipe materials such as ABS,
PVC, CPVC, or Polypropylene. For details, please refer to the Exhaust Vent (ABS, PVC, CPVC,
or Polypropylene Vent) section on p. 11. Vent installations in Canada which utilize plastic vent
systems must use venting that complies with ULC S636.
• 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 or alter the vent collar of the micro-boiler.
• The vent must be easily removable from the top of the micro-boiler for normal service and
inspection of the unit.
• Avoid using an oversized vent pipe or using extremely long runs of the pipe.
• For rooftop venting, a rain cap or other form of termination that prevents rain water from
entering into the micro-boiler must be installed.
• Do not terminate the vent into a chimney. If the vent must go through the chimney, the vent
must run all the way through the chimney with approved vent pipe.
General rules for venting micro-boiler are:
• 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 require that the termination be at least 12 inches (305mm) 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.
• Regarding the clearances from the exhaust termination to the air inlet or opening, refer to the
"-Vent termination clearances-" section beginning on page 17.
General rules for vent terminations:
Installation - Venting
For the Hydro Smart HS120 Gas Condensing Micro Boiler
CAUTION
DANGER