INSTALLATION AND OPERATION INSTRUCTIONS
1-6
TANKLESS WATER HEATER 199
1.4 EXHAUST VENTING AND AIR INTAKE
When you plan the installation, ensure that you consider appropriate venting
materials, travel and termination decisions.
Consider the following when selecting a vent termination location:
•
Select a location where the units exhaust will not damage nearby plants,
shrubs, air conditioning equipment or be objectionable to the homeowner.
•
Exhaust gases will form a visible plume during cold weather. Avoid areas
where the plume could obstruct window views.
•
Prevailing winds could cause water/ice buildup on nearby objects including
building surfaces.
•
Avoid locations where people or pets could come in contact with exhaust
gases.
•
Avoid locations such as inside building corners, near adjacent buildings or
surfaces, window wells, stairwells, alcoves, courtyards, or other recessed
areas where wind could affect the unit’s performance or cause exhaust gas
recirculation.
•
Select a location where the termination is not likely to be damaged by foreign
objects such as stones or balls, or is subject to buildup of debris such as
leaves.
Install venting in accordance with the requirements of the jurisdiction having
authority: in Canada, Part 8,
Venting Systems
of the B149.1-10 Code and any
other local building codes are to be followed. In the USA the National Fuel Gas
Code, ANSI 223.1, latest edition, prevails. Where there is a discrepancy between
the installation instructions below, and the code requirements, you must apply the
more stringent of the two requirements.
Provisions for combustion and ventilation air in accordance with the section “Air
for Combustion and Ventilation,” of the
National Fuel Gas Code, ANSI Z223.1/
NFPA 54
, or Clause 8.2, 8.3 or 8.4 of
Natural Gas and Propane Installation Code,
CAN/CSA B149.1
, or applicable provisions of the local building codes.
Tankless
Water Heater
FLUE GAS
EXHAUST TO
OUTDOORS
Figure 6: Basic exhaust vent assembly
WARNING
- Venting, condensate
drainage, and combustion
air systems for all units
must comply with applicable
codes and the instructions of
their respective Installation
manuals.
- Inspect finished vent and air
piping thoroughly to ensure
all are airtight and comply
with the instructions provided
and with all requirements of
applicable codes.
- Failure to follow all
instructions can result in
flue gas spillage and carbon
monoxide emissions, causing
severe personal injury or
death. Failure to comply will
result in severe personal
injury or death.
DANGER
Failure to properly vent
the unit to the outdoors
as outlined in this Venting
section will result in death
or serious personal injury.
To avoid the risk of fire,
explosion, or asphyxiation
from carbon monoxide,
NEVER operate the unit
unless it is properly vented
and has adequate air supply
for proper operation as
outlined in this Venting
section.
This unit must have
air supply connected and
terminated to the outdoors.
DANGER
Do not common vent this
tankless water heater with
any other existing or new
appliance.