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IMPORTANT NOTE
The purpose of this manual is to act as an installation guide
only for the LIFEBREATH Clean Air Furnace.
Manufacturers' instructions for other components, such as
the waterheater/boiler, must be followed.
All national and local code requirements must be met when
installing a LIFEBREATH Clean Air Furnace. Be sure to
consult the proper authorities.
Note: Temperatures greater than 130°F (54°C) pose a seri-
ous risk of scalding individuals running domestic
hot water for potable use.
This appliance complies with IAS Canada Inc. Requirement
CR95-003, Additional Require-ments for Fan Coil Units for
use with Potable Water Heaters.
All piping and components connected to this appliance shall
be suitable for use with potable water.
Toxic chemicals, such as used for boiler treatment, shall not
be introduced into the potable water heater system.
When using this system and the hot water for space heating
is set to a higher temperature than for other uses, an anti-
scald valve shall be used to ensure water for common use is
reduced in temperature to minimize a scalding hazard.
Combining two or more end uses such as space heating and
the heating of domestic hot water in a single system has the
potential to increase efficiency and reduce overall capital
costs. However, the proper design, installation, and com-
missioning of these systems are critical if these advantages
are to be realized.
This manual provides a guideline of good engineering prac-
tice in the design, installation and commissioning of
Integrated Combo Systems. The guidelines in the manual
are designed for residential forced warm air Integrated
Combo Systems which utilize domestic water heaters or
boilers and the LIFEBREATH furnace. Heating and cooling
loads shall be calculated in accordance with recognized
Residential Heat Loss and Heat Gain Calculation methods.
Duct design shall comply with recognized Residential Air
System Design methods. This manual provides worksheets
to be used for the purpose of sizing residential water heaters
and the combo furnace.
The LIFEBREATH Clean Air Furnace is a volume ventila-
tion system. Use the optional Lifebreath Bathroom Exhaust
System Kit (Part 99-CAF-BESKIT) if you wish to exhaust
from specific locations such as bathrooms.
Description and Purpose
Operation Heating/Cooling
When the room thermostat calls for heat, it activates a cir-
culation pump located inside the Clean Air Furnace. This
pump delivers hot water from the water heater, through the
furnace coil and back to the water tank. Simultaneously, the
furnace blower switches on to high speed and will start cir-
culating air across the coil, which picks up heat and delivers
it to the rest of your home.
Once the thermostat's temperature is reached the pump will
shut off, and the blower will return to its pre-set speed or
off.
Note: When the furnace blower is left running on low
speed the air in the home circulates continuously. When
the heat is called for the blower will automatically switch
to a higher speed. After the required hot air has been
delivered the blower will switch back to low speed.
When the thermostat calls for cooling (evaporator coil and
condensing unit required), the furnace blower activates to
high speed and the outdoor condenser unit is energized.
After the thermostat temperature is reached, the condensing
unit will shut off and the blower will return to its preset
speed or off.
Ventilation
The heat recovery ventilation (HRV) portion of the Clean
Air Furnace, is automatic. Once set, a desired amount of
fresh air will be drawn into the home while the furnace
blower is activated.
To reduce humidity, increased ventilation may be required
during heating season. An optional remote dehumidistat can
be installed. The dehumidistat will increase the speed of the
furnace blower to high and will return to its original setting
when humidity levels decrease. Your dehumidistat must be
switched off during warmer months. A quality humidifier
should be added if you wish to increase winter humidity
levels
Typically the air flow for ventilation will be set to 50 -
70cfm, for low speed furnace operation, and
100 - 150cfm at high speed. The pleated furnace filter
should be checked regularly and replaced as needed. The
HRV filter should be washed twice a year or more often if
needed.
Off Season Circulation Timer
All models are equipped with a circulation timer. It is nor-
mal operation for these models to automatically run the
circulation pump intermittently for a short period of time.