Page 1
CAF-02-MB
0707
Hydronic Models with Built-in
Heat Recovery Ventilator (HRV)
MANUFACTURED WITH
AIRCOM ELECTRONICS
Operation, Sizing and Installation Manual
Models: CAF-U-S4A-24-P16(E16), CAF-D-S4A-24-P16(E16), CAF-H-S4A-24-P16(E16), CAF-U-L4A-36-P16(E16),
CAF-D-L4A-36-P16(E16), CAF-H-L4A-36-P16(E16), CAF-U-L2A-48-P16(E16), CAF-U-00-36-P16(E16), CAF-U-00-48-P16(E16)
Page 2
2
Introduction.......................................................................3
Overview of the CAF........................................................3
Description and Purpose ..................................................4
Operation Heating/Cooling...............................................4
The Recovery Core ...........................................................5
Combo System Basic Principle.........................................6
Plumbing......................................................................7-13
Installation .................................................................14-16
Pitot Tube Air Flow Balancing..................................17-18
Function and Controls ...............................................19-20
Optional Remote Control Devices..................................21
Wiring the Controls.........................................................22
Aircom Relays ................................................................23
Service and Maintenance ................................................25
Troubleshooting.........................................................26-27
Model Number Nomenclature Breakdown.....................28
Specifications ............................................................29-37
System Commissioning ..................................................38
Work Sheets...............................................................39-44
Wiring Diagrams .......................................................45-46
Leave this manual for the homeowner!
Installing Contractor
Telephone / Contact
Serial Number
Installation Date Model
TO BE COMPLETED BY CONTRACTOR AFTER INSTALLATION
CAUTION
Table of Contents
It is always important to assess how the
operation of any HRV/ERV may interact with
vented combustion equipment (ie. Gas Furnaces,
Oil Furnaces, Wood Stoves, etc.).
CAUTION
Never install an HRV/ERV in a situation where its
normal operation, lack of operation or partial
failure may result in the backdrafting or
improper functioning of vented combustion
equipment!
Page 3
3
You will notice that the heated air in your home feels more
comfortable than air heated by a conventional furnace. One
reason for this is that LIFEBREATH's hydronically heated
air is uniform and temperate... no short blasts of hot air or
hot and cold temperature spikes. The air flowing from your
hot air vents will not feel as hot to the touch as air from a
conventional furnace.
With a high efficiency, adequately sized natural gas,
propane or oil hot water heater/boiler, you will always have
plenty of hot water for showers and baths, washing dishes
and clothes, and all other normal domestic hot water needs.
If there is an unusually high demand for hot water, such as
filling a large hot tub, then all you need to do is allow more
time for the task so the water heater/boiler can keep up to
its job of providing hot water for the heating system as well
as other household uses.
Once it is correctly installed, safety will never be an issue
with your LIFEBREATH furnace. No flames, fumes or flue
gases to be concerned about. Your domestic hot water
heater/boiler now provides the heat source for your furnace.
This Operation and Installation Guide will help you learn
about your LIFEBREATH Clean Air Furnace quickly and
easily. The table of contents will show you where to find
information on every feature of this unit along with easy to
understand operating instructions. If, however, you do
encounter a question that is not covered in this Guide you
should call the LIFEBREATH dealer who installed your
furnace. Chances are that he will be able to give you a satisfactory answer but if he is unable to do so then we invite
you to contact us directly.
Nutech Brands Inc.
Introduction
Overview of the Clean Air Furnace
Hydronic Coil
and Pump
Compartment
Recovery Core
and Ventilation
Compartment
Aircom
Electronics
and Fan
Compartment
Page 4
4
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 antiscald 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 commissioning of these systems are critical if these advantages
are to be realized.
This manual provides a guideline of good engineering practice 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 ventilation 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 circulation 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 circulating 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 normal operation for these models to automatically run the
circulation pump intermittently for a short period of time.
Page 5
5
HRV - Aluminum Core
A Heat Recovery Ventilator (HRV) is designed to provide
fresh air into a building while exhausting an equal amount
of stale air. During the winter months, the incoming cold
fresh air is warmed by utilizing the heat recovered from the
stale air before it is exhausted to the outdoors. During summer months when the indoor space is air conditioned, the
Heat Recovery Ventilator will help in cooling the incoming
fresh air with the stale air that is being exhausted.
ERV - Enthalpic Paper Core
An Energy Recovery Ventilator (ERV) is designed to provide fresh air into a building while exhausting an equal
amount of stale air. An ERV is designed for use in warm
humid areas with heavy air conditioning use. The ERV will
transfer both sensible and latent heat from the incoming
fresh air to the outgoing stale air thereby reducing the load
(due to ventilation) on the air conditioning system.
The Recovery Core
e
Stale Air
from Building
ATTENTION
The ERV - Enthalpic Core is not suitable for
climates where the outdoor temperature
drops below -4°C (25°F).
Fresh
Outdoor Air
Fresh Air
to Building
Stale Air
to Outsid
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6
Closed Loop System
A system becomes closed when a Check Valve or a backflow prevention valve is installed in the cold water piping
upstream of the water heater.
A check valve will prevent water being relieved into the
cold water system due to pressure created when water is
heated in the water heater.
Combo System Basic Principles
Open and Closed Systems
Open and Closed systems both deliver hot water and space
heating.
Water systems that incorporate a pressure tank (i.e. well
systems) are normally Open Systems and most municipal
water systems are Closed Systems.
Drain Valve
A drain valve is required to allow the heating loop to be
drained for service or repair and to remove air from the
heating loop when commissioning a system. The drain
valve should be near the low point of the return piping system to be near the water heater. Ball, Globe or Gate Valves
are suitable for drain valves.
IMPORTANT
Refer to local codes, local bylaws and installation
manuals supplied with water heater before starting
any installation work.
Conventional
Cooling
(Not available
through
Nutech)
This Check Valve minimizes
Thermo-Siphoning. Thermo
Siphoning is the cold water
backflowing through the
heating loop when domestic
hot water is called for.
ATTENTION
Check valves should always be installed in a
vertical rise with the flow of water shown.
COLD WATER INLET
EXPANSION TANK
OR OTHER MEANS
(WHEN REQUIRED)
CHECK
VALV E
VALV E
(shut off)
WATER HEATER
DOMESTIC HOT WATER
ANTI-SCALD VALVE
(WHEN REQUIRED)
VALV E
(shut off)
VALV E
(shut off)
VALV E
(balancing)
CHECK
VALV E
HEATING COIL
HRV/ERV CORE
DRAIN
VALV E
BLOWER
SUPPLY AIR
COOLING COIL
(OPTIONAL)
RETURN AIR
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7
Plumbing
In order to improve serviceability of our products, the
check valve is included with our manual kit for field installation between the air-handler and hot water source.
The check valve should be installed in a vertical run of
pipe with the flow of water in an upward direction.
An arrow on the check valve indicates its correct orientation and must match the direction of water flow.
This will allow for ease of service to remove any installation debris or service required due to extended hard water
conditions.
Note:Take care during soldering to avoid debris or
solder from lodging in the check valve.
Note:It is critical to follow the piping configuration
shown.Maintain a minimum distance of 12” above
the CAF/AH. This will minimize thermal siphoning in
the combo system.
* It should be noted that problems have been observed when using the side
tappings on certain water heaters; therefore, it is strongly recommended to use the top
water tappings as indicated in Figure 1 to minimize t
hermal siphoning and related
issues.
Figure 1
Figure 2
To
House
Min. 12" (305 mm)above
12"
top of CAF / AH
Check
Val ve
Water
Heater
CAF
or
AH
To
House
Water
Heater
Check
Valve
Min. 12" (305 mm)
12"
above top of CAF / AH
CAF
or
AH
Page 8
8
Expansion Tanks
Expansion tanks are required in addition to a Check Valve
for Closed Systems because pressure is created when water
is heated in the water heater.
The expansion tank has an air bladder which will contract to
relieve pressure in the system. The tank should always be
connected to the cold water piping between the water heater
shut off valve and the cold water inlet to the water heater.
Anti-Scald Valve
An anti-scald valve is required when the water heater thermostat is set above 140°F (60°C). Also, an anti-scald valve
may be required for all installations by the “authority having jurisdiction”. The valve is placed in the hot water supply
piping from the water heater downstream of the heating
loop connection and upstream of any domestic hot water
connection.
The purpose of the valve is to limit the maximum temperature available for domestic hot water by mixing hot water
from the water heater with cold water from the municipal
supply.
The Anti-Scald valve must be thermostatically controlled
and approved to the ASSE standard No. 1016 and 1017 for
use as an anti-scald device.
Plumbing
Closed Loop System
Time to Scald
(1st degree burns)
Temperature Time
120°F 8 min.
130°F 20 sec.
140°F 3 sec.
160°F <1 sec.
Conventional
Cooling
(Not available
through Nutech)
COLD WATER INLET
CHECK
VALV E
VALV E
(shut off)
EXPANSION TANK
OR OTHER MEANS
(WHEN REQUIRED)
WATER HEATER
DOMESTIC HOT WATER
ANTI-SCALD VALVE
(WHEN REQUIRED)
VALV E
(shut off)
VALV E
(shut off)
VALV E
(balancing)
CHECK
VALV E
HEATING COIL
HRV/ERV CORE
DRAIN
VALV E
BLOWER
SUPPLY AIR
COOLING COIL
(OPTIONAL)
RETURN AIR
Page 9
Valves
(a) Located on the cold water side of the Heater.
This valve has the ability to isolate the hot water
(domestic and space heating) from the household cold
water supply. Every water heater requires this valve
regardless of space heating use.
(b) Located on the hot water supply side of the heating
loop, downstream of its connection to the domestic
water.
(c) Located on the return side of the heating loop upstream
of its connection to the domestic cold water.
9
Plumbing
Ball Valve
The Ball Valve can be used as a shut off or drain valve.
When in the open position, a full bore ball valve has very
little resistance to flow, and these valves tend to be both the
least expensive and the least susceptible to seizing over
time. Do not use reduced bore ball valves as they are very
restrictive to water flow.
Gate Valve
The Gate Valve can be used as a shut off or drain valve.
When in the open position, there is very little resistance to
flow. Gate valves tend to be less expensive than other types
of valves but are susceptible to chatter (noise) and malfunction with age.
Globe Valve
The Globe valve can be used as a shut off, drain or throttling valve. Even in the open position, the valve is fairly
restrictive to flow. It has a much greater equivalent length
(resistance.) than the other types of valves.
Balancing (Throttling) Valve
The Balancing (Throttling) Valve is used to reduce the
water flow rate and thereby increase the water temperature
drop. This is done to ensure proper activation of the water
heater thermostat.
A Globe Valve could also be used for Balancing (Throttling)
but has more resistance than the Balancing Valve.
These two
valves isolate
the heating
loop for
service or
repair.
H
(a)
C
Supply
(b)
(c)
Return
Page 10
10
Call for Space Heating
There are two thermostats controlling every combo system,
the water heater thermostat (controlling the hot water temperature) and the room thermostat (controlling the room air
temperature).
When the room thermostat calls for heat, the circulation
pump is activated. Hot water is then drawn from the top of
the water heater through the air handler, and then returned
to the water heater.
Plumbing
Open Loop System
Hot Water Temperature Drop
The water heater thermostat will initiate the water heater as
required as long as there is a 20°F (11°C) temperature drop
between the hot water supplied to the air handler and the
returning water.
A temperature drop less than 20°F (11°C) can cause the
water heater thermostat not to initiate. This will result in a
lower hot water supply temperature or poor space heating
performance with fluctuating domestic water temperatures.
Call for Domestic Hot Water and Space Heating
When both return water from the space heating loop and
new cold water (replacing domestic water being used)
enters the water heater, the mixed entering water is cool
enough to activate the thermostat quickly. In this situation,
the water heater must be capable of satisfying the combined
need for domestic hot water and and space heating at the
same time.
Conventional
Cooling
(Not available
through
Nutech)
COLD WATER INLET
VALV E
(shut off)
WATER HEATER
DOMESTIC HOT WATER
ANTI-SCALD VALVE
(WHEN REQUIRED)
VALV E
(shut off)
VALV E
(shut off)
COOLING COIL
(OPTIONAL)
RETURN AIR
VALV E
(balancing)
CHECK
VALV E
SUPPLY AIR
ATTENTION
HEATING COIL
HRV/ERV CORE
DRAIN
VALV E
BLOWER
ATTENTION
Plumbing components and system
configuration may vary from diagrams
portrayed.
Chemicals (such as boiler system
additives) cannot be added to a domestic
hot water system.
Page 11
11
Plumbing
Air System
A circulation fan draws cool house air at approx. 70°F
(21°C) from the return ductwork, forces it through the water
coil where it is heated, and then distributes it to the various
rooms of the house through the supply ductwork.
Water System Pressures
Within the water system of an Integrated Combo system,
there are three terms that the designer/installer must understand.
1. Hot water supply temperature (EWT)
2. Hot water flow rate (GPM)
3. Air handler return temperature
4. Air handler flow rate (CFM)
Head Pressure
Head pressure is the pressure created by the circulation
pump to push water through the piping system. It is this
pressure which is used to overcome the resistance to water
flow (friction) caused by the water pipe and fittings. It is
similar in concept to the external static pressure in an air
duct system. Head pressure is measured in feet of water
(millimeters of water).
Water Flow Rate
Water flow rate is the amount of water flowing in the system. It is directly related to the head pressure and the
resistance to flow. Flow rate is measured in gallons per
minute (liters per minute).
The circulation pump is factory installed within the air handler. The water flow rate will vary depending on the pumps
performance and the head pressure (resistance) of the complete heating loop system.
The piping and fittings used to connect the water heater and
air handler must be sized to handle the volume of hot water
required by the air handler within the pressure limitations of
the circulation pump. All piping, fittings solders, and fluxes
must be acceptable for use with domestic hot water.
Pressure Drop (PD)
Pressure drop (PD) is the reduction in total pressure caused
by components added to a piping system such as coils,
valves, and fittings. The measurement of pressure drop is
the difference in pressure on the inlet side of the component
and the outlet side. Pressure drop is measured in feet of
water (millimeters of water).
When connecting the water lines for heating loop (air handler) to the domestic water system, the pipes should be
connected with a “tee” to the side of a vertical domestic
water pipe or the bottom of a horizontal domestic water
pipe. This is to help prevent air from entering the heating
loop. The connections should be as near as practical to the
water heater.
Water Pump Performance Specifications
NOTE
The vertical height of the heating loop does not
impact on the head pressure as the pressure
required to push the water up the vertical height is
offset by the weight of the water in the vertical drop
on the other side of the heating loop.
S2 and S4 Models
16
14
12
10
8
6
Total Head in Feet
4
2
0
1 2 4 6 8 10 12
Capacity on U.S. gpm
L2 and L4 Models
16
14
12
10
8
6
Total Head in Feet
4
2
0
1 2 4 6 8 10 12 14 16 18 20
Capacity on U.S. gpm
Page 12
12
Air Handler Output Capacity
There are four factors that will significantly affect the heating output of the air handler.
They are:
• Hot water supply temperature (EWT)
• Hot water flow rate (GPM)
• Air Handler return air temperature
• Air Handler air flow rate (CFM)
Hot Water Supply Temperature
The hot water supply temperature is controlled by the water
heater thermostat. This is set by the installing contractor to
provide the required temperature at the hot water outlet of
the water heater.
The hot water supply temperature is typically 140°F (60°C).
If this temperature must be increased to achieve higher outputs from the furnace an anti-scald valve must be used to
prevent domestic hot water temperatures above 140°F
(60°C). The manufacturer of the Hot water Tank should be
consulted for temperatures higher than 140°F.
It is important that a warning label be placed near the water
heater thermostat telling the homeowner not to change the
thermostat setting. The label is included with the furnace.
Hot Water Flow Rate
The hot water entering the water coil is the source of heat to
the air handler. The effect of changing the amount of water
entering the coil is the same as changing the water temperature. As water flow is reduced, the output of the air handler
and the air temperature rise will both be lowered.
Air Handler Return Air Temperature
The return air temperature entering the air handler is
approx. 60°F (33°C) below the hot water inlet temperature.
If the return air temperature entering the air handler is
reduced, more heat transfer will occur and the output of the
air handler will increase.
Air Handler Air Flow Rate
The air entering the air handler can only be warmed by the
temperature difference between the hot water and the cool
air. As the volume (CFM (L/s)) of air is reduced, the amount
of heat which can be transferred is also reduced.
Air Handler Temperature Rise
In a fuel fired furnace, the combustion gases can be 1000°F
(538°C) above the return air temperature. These units typically have a temperature rise from 50°F (10°C) to 90°F
(32°C) and therefore delivers air at the diffuser at 120°F
(49°C) to 160°F (71°C).
With an Integrated Combo System, the hot water temperature is approx. 130°F (54°C) which is 60°F (15.5°C) above
the return air temperature. These units typically have a temperature rise of 35°F (2°C) to 40°F (4°C) and therefore
would deliver air at the diffuser at approximately 105°F
(40.5°C) to 110°F (43°C).
Room Thermostat
The room thermostat controls both the water
circulation pump and the air circulation fan. It should be on
a centrally located, inside wall away from any source of
heat such as diffusers, appliances and direct sunlight.
Energy Saving Room Thermostat
A set back thermostat or “smart stat” can be used with a
combo system, but care must be taken in the timing of the
temperature changes. The timing of morning warm up
should be early enough that the desired air temperature has
been reached before the people begin to use domestic hot
water. The highest demand for space heating is during the
morning warm up and the highest demand for domestic hot
water is during morning showers. Even if the water heater
is properly sized, it may not be able to meet this combined
load. Therefore, large set backs should be avoided.
Design vs. Field Conditions
The factors discussed between design parameters and actual
field conditions can impact greatly on output capacity.
Therefore, it is important to do a thorough and complete
commissioning of the integrated combo system to ensure
the design parameters are met.
Plumbing
NOTE
Although the water in the combo system is pressurized by the domestic water system the pump is
required to create water flow in the heating loop.
The domestic water system applies the same pressure to the supply and return sides of heating loop.
Page 13
13
Plumbing
Drain Line
The ventilation portion of the Clean Air Furnace has two
drain pans for removing condensation, which may occur on
the heat recovery core during cold weather.
Piping
The hot water piping between the hot water tank and the
Clean Air Furnace should be new copper type, and should
not be treated with chemicals, sealant or anything else, that
will interfere with the purity of the potable water. Only nonlead, low temperature solder is permitted for sealing copper
joints.
Where possible the length of pipe should not exceed 200'
total equivalent length. Any piping running through unconditioned space must be insulated to prevent heat loss, and
possible freezing of the line.
Look inside the furnace and locate the pump. Attach the
"Hot Water In" (Supply) to the pipe running to the pump.
Attach the "Hot Water Out" (Return) to the pipe running to
the coil. Do not reverse these lines, as this will cause the
unit to malfunction.
For piping conventional water heaters, connections to and
from the Clean Air Furnace to the water tank should be
made at the point where the pipes leave the tank vertically.
A "T" fitting used in each vertical line, with the Clean Air
Furnace piping connected to the horizontal side of this fitting, will work best in avoiding air locks in the circulation
pump of the furnace.
*Note: Remove shipping block from underneath pump and
discard.
T
HRV Drain Line Diagram
KNOCKOUT
DRAIN
SPOUT
TA P E
2” (50 mm)
TEE
CONNECTOR
THROUGH KNOCKOUT
TO DRAIN
DRAIN
SPOUT
KNOCKOU
Page 14
This manual gives the contractor guidelines for installing
the LIFEBREATH Clean Air Furnace. All national and
local codes relating to this type of equipment must be followed.
Locating The Unit
The Clean Air Furnace is designed to be installed vertically, (unless it is designated as a Horizontal unit ”H”), in a
conditioned space, where the surrounding temperature
does not fall below 50°F (10°C). Attic installations are not
recommended. Typically the unit is installed in a mechanical area of the basement, or other partitioned mechanical
room, elsewhere in the home.
A location close to an outside wall is recommended, as the
ventilation supply and exhaust portion will need to be ducted to the outside air. Sufficient clearance around the unit is
required for service of the filter, heat recovery core and
components. As a rule this unit should be installed adjacent
to the hot water heater. If this is not possible, or if the piping layout is complex, the total head pressure on the pump
should be calculated.
Duct Connections
To accommodate various installations, the Clean Air
Furnace has knockouts for the return air plenum and ventilation ducts, on both sides of the cabinet. Special care and
attention should be given to determining which knockouts
are to be removed.
Slide Heat Recovery Core out to remove ventilation knockouts. Never install ductwork directly to the cabinet that is
smaller than the opening provided.
Penetrations from sheet metal screws used to fasten the
ductwork to the cabinet of the unit should only be placed
into the duct flange provided. This is to avoid contact and
damage of the heating/air conditioning coils and internal
wiring.
14
Option 1 - Upflow Models
NOTE: Return plenum opening can be on either side of cabinet and is not dependent on which side the ventilation ports are on.
Ventilation Ports Off Left
Ventilation Ports Off Right
Installation
Remove circular
metal knockout
Remove
styrofoam
knockout
Remove circular
metal knockout
Remove
styrofoam
knockout
Page 15
Ducting
The duct sizing for the furnace section can be determined
using HRAI Residential Air System Design Manual,
SMACNA, or any other industry-recognized manuals.
Note: "Combo units" normally deliver air at approx.
110°F (43°C), and therefore may require larger than normal ductwork. When installing the Clean Air Furnace as
a replacement unit on a retrofit application, always calculate the size of duct that is there.
Any ductwork running through unconditioned space must
be sealed properly and insulated to prevent heat loss. All
local codes must be followed in determining the amount of
insulation needed.
The ventilation section consists of two 6" (15.2cm) round
ports located on the side of the cabinet, which vent to the
outside. Insulated ducting with a vapour barrier such as
flex-ducting, or ridged pipe wrapped in pipe sleeve, is
required to prevent condensation from occurring on the
pipe. Also the airflow in these lines is designed to be balanced. (See "Balancing Airflows" in this manual, for
damper location and procedure).
15
Option 2 - Downflow Models
Ventilation Ports Off Left
Ventilation Ports Off Right
Horizontal Models
Installation
Remove
styrofoam
knockout
Remove
styrofoam
knockout
Remove
styrofoam
knockout
Remove
styrofoam
knockout
Remove circular
metal knockout
WARNING
A Backdraft Damper is required in the exhaust
air duct to prevent cold air from entering the
unit when the Clean Air Furnace is not running.
Page 16
Locating Intake Weatherhood
The intake weatherhood should be located as follows:
• 4 - 6' from ventilation exhaust hood, and upstream of
prevailing winds, if possible.
• At least 6' from a dryer vent, oil fill pipes, combustion
outlets, gas meters, garbage containers or anything else,
which may contaminate the air.
• Do not locate fresh air intake in garages, crawl spaces or
attics.
• Install 18" (45.72 cm) above grade, or above expected
snow accumulation.
Locating the Exhaust Weatherhoods
The Exhaust Weatherhood should be located as follows:
• At least 4-6' from the supply inlet
• At least 18" (45.72 cm) above grade or expected snow
accumulation
•
At least 3' from gas meters, combustion vents, or dryer
vents
•
Do not install in garages, crawl spaces or attics
Outside Ducting the Weatherhoods
The ventilation portion of the Clean Air Furnace can be
vented off either side of the unit by removing knockouts
provided. Once the knockouts in are removed, a bead of
silicone can be placed on the plastic thermo-collars (provided), to form a seal between the collars and the cabinet.
The collars can then be fastened into place with screws.
Note the exhaust outlet is always the port on the bottom,
and the supply inlet is always the port on the top, both
ports should be labeled from the factory as such.
The ductwork from the outside weatherhoods to the unit, is
usually flexible ducting, although rigid pipe may be needed
if the runs are greater than 10 feet. In either case the pipes
(both exhaust and supply and the added fittings) must be
insulated, with a complete vapor barrier.
To minimize restriction in airflows the ducting should be
short, with as few bends as possible. See diagram below
for recommended connection of insulated ducting to outside weatherhoods.
16
Locating Weatherhood
Installation
WEATHERHOODINSTALLATION
ATTENTION
It is extremely important to design and install
the fresh air intake in an area where the hoods
will gather the freshest air.
1/4"(6mm)SCREEN
(frontview)
COLLARISSUPPLIEDTO
SCREEN
(sideview)
12"galvanized
pipesupplied
EXTERIOR
WALL
1. ThermalCollarslidesovergalvanized
sleeveofWeatherhood.
2. FastenThermalCollartoBelt.
3. SlidetheInsulatedFlexibleDuctingover
theWeatherhood'sgalvanizedsleeveand
fastenittotheThermalCollar.
4. Hoodishingedtoallowforeasyaccess
forcleaningofbirdscreen.
ENSUREVAPOURBARRIER
IS100%SEALEDTO
WALLPLATE
Page 17
It is necessary to have balanced air flows in an HRV. The
volume of air brought in from the outside must equal the
volume of air exhausted by the unit. If the air flows are not
properly balanced then:
• The HRV may not operate at its
maximum efficiency
• A negative or positive air pressure may occur
in the house
• The unit may not defrost properly
• Failure to balance the HRV may void warranty
Prior to balancing, ensure that:
1. All sealing of the ductwork system has been
completed.
2. All of the HRV's components are in place and functioning properly.
3. Balancing dampers are fully open.
4. Unit is on high speed.
5. After taking readings of both the stale air to the HRV
duct and fresh air to the house duct, the duct with the
lower CFM ([L/s] velocity) reading should be left alone,
while the duct with the higher reading should be
dampered back to match the lower reading.
6. Return unit to appropriate fan speed for normal operation.
Balancing Procedure
The following is a method of field balancing an HRV using
a Pitot tube, advantageous in situations when flow stations
are not installed in the ductwork. Procedure should be performed with the HRV on high speed.
Choose the straightest section of duct between the HRV
and the weatherhoods. This will be used for both the supply and return ducts.
Drill a small hole in the duct (about 3/16"), three feet
downstream of any elbows or bends, and one foot upstream
of any elbows or bends. These are recommended distances
but the actual installation may limit the amount of straight
duct.
The Pitot tube should be connected to a magnehelic gauge
or other manometer capable of reading from 0 to 0.25 in.
(0 - 62 Pa) of water, preferably to 3 digits of resolution.
The tube coming out of the top of the Pitot is connected to
the high pressure side of the gauge. The tube coming out of
the side of the Pitot is connected to the low pressure or reference side of the gauge.
Insert the Pitot tube into the duct, pointing the tip into the
airflow.
For general balancing it is sufficient to move the Pitot tube
around in the duct and take an average or typical reading.
Repeat this procedure in the other (supply or return) duct.
Determine which duct has the highest airflow (highest
reading on the gauge). Then damper that airflow back to
match the lower reading from the duct. The flows should
now be balanced.
Actual airflow can be determined from the gauge reading.
The value read on the gauge is called velocity pressure.
The Pitot tube comes with a chart that will give the air flow
velocity based on the velocity pressure indicated by the
gauge. This velocity will be either feet per minute or
metres per second. To determine the actual airflow, the
velocity is multiplied by the cross sectional area of the duct
being measured.
17
Figure A
Pitot Tube and Gauge
Figure B
Placement of the Pitot Tube
Pitot Tube Air Flow Balancing
Note: For best results keep Pitot tube
well away from dampers.
Pitot Tube
Page 18
This is an example for determining the airflow in a 6" duct.
The Pitot tube reading was 0.025inches of water. From the
chart, this is 640 feet per minute.
The 6" (15.2 cm) duct has a cross sectional area of:
= [3.14 x (6"÷12)
2
]÷4
= 0.2 square feet
The airflow is then:
640 ft./min. x 0.2 square feet = 128 cfm
For your convenience, the cross sectional area of some
common round duct is listed below:
DUCT DIAM. (inches) CROSS SECTION AREA (sq. ft.)
5.0 (125 mm) .14
6.0 (150 mm) .20
7.0 (175 mm) .27
The accuracy of the airflow reading will be affected by how
close to any elbows or bends the readings are taken.
Accuracy can be increased by taking an average of multiple
readings as outlined in the literature supplied with the Pitot
tube.
18
Figure C
Push and turn with slotted
screwdriver. Damper
automatically locks when
pressure is released.
When connecting ductwork
to the collar, take note where
screws are located. Screws
should be located no further
than 1/2” (12.70 mm) from outside edge of collar, so as not to
impede operation of the damper.
1/2” (12 mm)
Insulated flexible
ducting
Balancing Collar Instructions
Figure D
Pitot Tube Air Flow Balancing
Back Draft Damper
The back draft damper (not included) can be located anywhere in a vertical rise of the exhaust duct.
INSULATED PIPE
WITH VAPOUR
BARRIER
OUTSIDE
BUILT-IN
BALANCING
DAMPERS
BACK DRAFT
DAMPER
WARNING
A Backdraft Damper is required in the exhaust
air duct to prevent cold air from entering the
unit when the Clean Air Furnace is not running.
Page 19
19
Standard 24 Volt
Thermostat
Connection
(Thermostats are not available through Nutech)
Thermostat Heat Anticipator Settings
Mechanical Thermostats - start at .5 amp and may need to
be increased depending upon the residual heat left in the
hydronic coil and duct work.
Electronic Thermostats - to be set on electric style heat.
Off Season Circulation Timer
Water is periodically circulated through the space heating
loop during the summer and other periods of infrequent use.
The concern is that water which remains stationary in the
heating loop during the summer may be less than desirable
as domestic hot water when it is returned to the water heater
at system startup in the fall.
Basic Functions
C - Common
R - 24 volt Supply
W - Medium or High Fan Relay with Circulation Pump
(The speed depends on Dip Switch # 6 setting)
Y&G- Medium or High Fan Relay
(The speed depends on Dip Switch # 7 setting)
G - Low Speed Fan Relay
O - High Speed Fan Relay with Circulation Pump
Function and Controls Standard Motor
Standard Motor DIP Switch Settings
(DIP #1-8 OFF is Factory Setting)
DIP #2 to ON will disable the
Off Season Circulation Timer
DIP #6 to ON will select
Medium Speed for heating
(Factory setting is OFF for High
Speed)
DIP #7 to ON will select
Medium Speed for cooling
switch (Factory setting is OFF
for High Speed)
T1
T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
T2 T3
Line
T21 T22 T23 T24
AUX1AUX
F1
MAX
1
amp
C1
VDR1
P1
C
T26 T27 GRNYEL
8 7 6 5 4 3 2 1
2
SW1
DIP SWITCHES TO BE
ADJUSTED BY QUALIFIED
TECHNICIANS ONLY.
RWY G
Thermostat
To “ C”
ON
Neutral
TP1
Digital Controls
To “ Y”
ON
DET
CR1
A/C Unit
T18 T19
C6 C7
N.O.
COM
K7 K1 K2K8
T32
T33
T34
Contact 2 Contact 3 Contact 4
T35
T36
COM
T37
T38
T39
N.O.
T40
RELAY
FEED
T20
SPARE
T43
N.C
T42
T41
COM
F2 MAX 2 amp
P2 P3
Defrost
Freeze
C5
C4
N.O.
K6
R
T29T28REDOGYWRCT25
Fan Hi Fan Med Fan Low
N.O.
COM
K3 K4 K5
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
24Vac12Vac Com
T30
T31
Contact 1
8 7 6 5 4 3 2 1
WARNING
Do not adjust any other DIP switches than
indicated above.
WARNING
Do not energize the CAF until the plumbing is
connected and commissioned. Failure to do so
will damage the pump.
Page 20
20
O
a
M
Standard 24 Volt
Thermostat
Connection
(Thermostats are not available through Nutech)
Basic Functions
• Thermostat fan switch will control low speed fan
operation
• Call for heating - high speed
• Call for cooling - high speed
Function and Controls ECM Motor
ECM Motor DIP Switch Settings
ECM Motor DIP Switch Settings
(DIP 6&7 ON is Factory Setting)
DIP #2 to ON will disable the
Off Season Circulation Timer
Factory Setting
Thermostat Heat Anticipator Settings
Mechanical Thermostats - start at .5 amp and may need to be
increased depending upon the residual heat left in the hydronic coil and duct work.
Electronic Thermostats - to be set on electric style heat.
T1
T2 T3
T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
Line
T21 T22 T23 T24
AUX1AUX
F1
MAX
1
amp
C1
VDR1
C
T26 T27 GRNYEL
8 7 6 5 4 3 2 1
2
DIP SWITCHES TO BE
ADJUSTED BY QUALIFIED
TECHNICIANS ONLY.
P1
SW1
Neutral
ON
CR1
TP1
Digital Controls
DET
F2 MAX 2 amp
P2 P3
Defrost
Freeze
COM
C5
C4
K6
R
Fan Hi
N.O.
COM
K3
K8
N.0. CO
24Vac12Vac Com
T30
T29T28REDOGYWRCT25
To “Y”
RWY G
To “ C”
Thermostat
A/C Unit
ON
Cont
N.
T31
Switch Setting
Cool Switches
Both OFF
1 0N - 2 OFF
1 OFF - 2 ON
1 ON - 2 ON
COOL HEAT
T2
T1
12 34 56 7 8
off on
COOL
Switch Setting
Heat Switches
Both OFF
3 0N - 4 OFF
3 OFF - 4 ON
3 ON - 4 ON
Switch Setting
Adjust Switches
Both OFF
5 0N - 6 OFF
5 OFF - 6 ON
5 ON - 6 ON
ADJUST DELAY
HEAT
ADJUST DELAY
Fan Speeds
Med High
Med Low
Fan Speeds
Med High
Med Low
Fan Speeds
Heat
Normal
Increase 15%
Decrease 15%
Normal
SW1
Cool
High
Low
Heat
High
Low
Cool
Normal
Increase 15%
Decrease 15%
Normal
8 7 6 5 4 3 2 1
WARNING
Do not adjust any other DIP switches than
indicated above.
Delay Switches are for future use - no function at this time
Note:
Refer to individual specification pages for Airflow
Performance specifications. Above settings correspond
to DIP switch settings on the ECM circuit board only.
Do not adjust DIP switches on MAIN Circuit Board.
WARNING
Do not energize the CAF until the plumbing is
connected and commissioned. Failure to do so
will damage the pump.
ATTENTION
DIP switches #6 & #7 must be ON for the ECM
motor to function (factory setting).
Page 21
21
Optional Remote Control Devices
Remote Dehumidistat
• The Dehumidistat initiates high speed fan operation
when humidity level exceeds selected setting.
• This main control should be located in a central “easy
access” location.
• Use 2 lead 18 gauge wire for the control connections.
• Install only one of these controls on a system
• Low Voltage
• Never install more than one dehumidistat to a system.
Part No. 99-130W
Digital Electronic Timer
• Boosts unit to high speed ventilation for 20, 40 or 60
minutes.
• Install up to 4 timers on a system.
• Use 3 lead 18 gauge wire for the control connections.
• Mounts in a standard 2x4 electrical box.
• Illustrated here with a "decora" cover plate.
• Low Voltage.
Part No. 99-104
DEHUMIDISTAT initiates high speed fan
operation when humidity level exceeds
selected setting.
20/40/60 minute status lights
Touch pad operation
Page 22
22
Wiring the Controls
Optional Digital
Electronic Timer
• Yellow to YEL
• Green to GRN
• Red to RED
Part No. 99-104
T26 T27 GRNYEL
C
DET
T28REDOGYWRCT25
R
T29
24Vac12Vac Com
T30
Contact 1
T31
T32
T33
Contact 2 Contact 3 Contact 4
T34
T35
T36
T37
T38
T39
T40
T41
VDR1
P1
C1
DIP SWITCHES TO BE
ADJUSTED BY QUALIFIED
TECHNICIANS ONLY.
T21 T22 T23 T24
AUX
1
AUX
2
MAX
amp
F1
1
SW1
T1
T2 T3
T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
Line
8 7 6 5 4 3 2 1
Optional Remote
Dehumidistat
Digital Controls
TP1
CR1
P2 P3
Freeze
Defrost
T42
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
F2 MAX 2 amp
K7 K1 K2K8
SPARE
N.C
T43
ON
COM
K6
COM
K3 K4 K5
COM
COM
Neutral
C4
N.O.
N.O.
N.O.
N.O.
T20
Fan Hi Fan Med Fan Low
RELAY
FEED
C5
T18 T19
• Red to T23
• Black to T24
Part No. 99-130W
Page 23
23
Aircom Relays
The Aircom circuit board has three available “dry contact”
relays. Contact 3 is not available.
Maximum 115V 10 amp resistive load.
Contact 1
This relay is a dry contact (no power supplied from board).
The relay switches upon a call for heat.
This relay can be used to switch the heat demand signal for
boiler operation.
Power (if required) must be supplied to common from an
external source.
Max. voltage - 120 volts
Max. Amperage - 10 amps
Contact 2 and 4
These relays are dry contacts (no power supplied from
board). The relays switche whenever the CAF blower motor
is operating.
These relays can be used to interlock Humdifiers, Air
Cleaning Equipment, etc.
Power (if required) must be supplied to common from an
external source.
Max. voltage - 120 volts
Max. Amperage - 10 amps
T39
T40
SPARE
T43
N.C
T42
T41
F2 MAX 2 amp
P2 P3
Defrost
Freeze
K7 K1 K2K8
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
R
24Vac
T30T29T28
T31
Contact 1
T32
T33
T34
T35
T36
T37
Contact 2 Contact 3 Contact 4
T38
Boiler
Contact
T39
T40
SPARE
T43
N.C
T42
T41
MAX 2 amp
P3
Defrost
K7 K1 K2K8
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
R
24Vac
T30T29T28
T31
Contact 1
T32
T33
T34
T35
T36
T37
Contact 2 Contact 3 Contact 4
T38
Humidifier
Contact
Page 24
24
In order for any appliance to work properly it must be set
up and tested by a knowledgeable technician.
The following conditions must be met prior to
start-up
1. Ensure that connecting water lines are purged and free of
debris.
Caution: solder or other debris may cause the furnace
pump or check valve to malfunction.
2. Blower wheel rotates freely inside its housing.
3. Wiring connections are tight.
4. Water is sitting in the "P" trap below the
HRV core.
5. All duct and pipe connections are sealed.
6. Check that styrene block is removed from under pump.
7. Front access door is on tight.
8. Fan speed selection:
a) Heating/Cooling - factory setting is at high speed and
can be changed in the electrical box to medium-high or
medium if required.
b) Ventilation - low speed is controlled by the
Thermostat Fan switch.
Once all of the necessary connections have been
made, the Clean Air Furnace Start-Up Procedure is
as follows:
1. Close shut-off valves separating the Clean Air Furnace
from the water heater.
2. Set up water heater according to manufacturer's instructions.
3. Purge air from unit. To do so, open the supply shut-off
valve to the furnace. Attach a garden hose to drain valve,
and drain water until you get a continuous flow. Close
the drain valve and purge the pump. To purge the air
from the pump, turn the large screw on the face of the
pump counterclockwise until water leaks out, then tighten. Open the supply shut-off valve.
4. Turn on power supply to Clean Air Furnace.
5. Switch the room thermostat to heat. The thermostat
should be set higher than the current room temperature in
order to energize the pump and commence the heating
cycle. (If the pump does not start, or the Clean Air
Furnace is not producing heat, refer to the
Troubleshooting Section in this manual.
6. Set room thermostat at desired temperature setting.
Start-Up Procedure
Page 25
25
A dedicated maintenance program will prolong the life of
the equipment, and maintain its optimum performance.
We recommend at least two (2) full inspections and cleanings per year under normal operating conditions, and more
if circumstances warrant it (i.e. situations of heavy smoke
may require servicing every one to two months).
Service should include:
• Cleaning of screens protecting outside hoods.
• Cleaning of the HRV (aluminum) core.
• Inspect filters and replace as necessary.
• Wipe down drain pans and inside of cabinet, using a mild
disinfectant.
• Ensure condensate drain has free flow of moisture.
• Inspect operation of blowers and electrical panel.
• Confirm operation.
Clean Core Twice a Year
a) Open access door.
b) Carefully grip ends of core, and pull evenly outward.
Core may be snug, but will slide out of the "H" channel.
c) Once removed from the cabinet, remove the foam filters.
d) Wash the core in warm soapy water (do not use dish-
washer).
e) Install the clean filters
f) Install the clean core.
Service/Maintenance
Ultra-efficient
heating coil
Tempered fresh air
to heating coil
Heated fresh air
to registers
Hot water
circulation pump
Hot water to coil
Fresh air intakes to HRV
Stale air to outside
Return air
from house
Domestic
water heater
Hot water
return
Heat recovery
ventilator heat
exchanger
PSC type
hi-efficiency
motor
Page 26
26
Lack of heat
1. Check that the room thermostat is set to the desired temperature.
2. Confirm the units have power and the shut-off valves are
open.
3. Ensure there is power to the unit and that the pump is
working. If the pump is not working properly it may be
stuck. Disconnect power and remove screw in center face
of the pump. Using a screwdriver, turn the pump shaft
several times to free it from sticking. Replace centerscrew and re-connect power. If pump still fails to start, it
may require replacement.
4. Confirm that the hot water heater is working and that hot
water is entering the Clean Air Furnace.
5. Verify that the airflow in and out of the system matches
designed specs. If airflow is low, check for blockage in
the filter or some other obstruction.
6. Make sure your water heater is sized large enough for
heat load of house and for domestic hot water use.
7. Air may still be in the water lines. If so, re-purge the system according to the start up procedure.
8. Confirm that the inlet and outlet pipe connections are not
reversed.
9. Ensure that there are no other restrictions in the water
lines, such as faulty valves, or debris.
Pump is noisy
Pumps can become noisy when air remaining in the lines
interfere with their operation. If this occurs re-purge the
system as indicated in the Start-Up Procedure.
HRV core freezes up
1. Make sure that the supply and exhaust lines are balanced
according to the "Balancing Procedure" in this manual.
2. If out of balance, ensure that the balancing dampers have
not been moved and that there are no obstructions in the
outside hoods.
During cooling cycle, hot water circulates through
the coil
If the check valve inside the cabinet is stuck in the open
position, hot water may infiltrate the heating coil. This
occurs when the hot pipes are not capped-off during installation or service and foreign debris enters the piping. This
debris can settle under the check valve seat and permit hot
water to flow into the coil. The problem can be corrected by
repeatedly flushing the heating loop until it is clean.
Water sits in drain pipes
1. Check drain pans or lines for plugs.
2. Confirm that the HRV core is installed according to manufactures recommendations.
3. Check the drain line for kinks.
4. Make sure that the O-ring in the drain nozzles sit flat.
5. Ensure the drain line has enough "fall" to it.
Condensation/ice forming inside ventilation ducts
A rip in the vapor barrier or poorly sealed joints may cause
condensation or ice to form on the ducting. If this occurs,
replace the entire line.
Troubleshooting
Page 27
27
Winter humidity levels are too low
1. If you have installed a dehumidistat ensure that its setting
is correct. (Summer - OFF) (Winter - 30% RH to 45%
RH).
2. Check humidifier settings. (Summer - OFF) (Winter 30% RH to 45% RH).
NOTE: Humidifier should always be 10% lower than
dehumidistat.
3. Change thermostat fan switch from manual to automatic.
Summer humidity levels are too high
1. If you have installed a dehumidistat ensure its setting is
correct. (Summer - OFF)(Winter - 30% RH to 45% RH).
2. Change thermostat fan switch from automatic to manual.
NOTE: The CAF has the ability to dehumidify during the
heating season. (When outside air is less humid than
indoor air). If you are in a region where outdoor humidity
levels are typically higher than indoor humidity levels, a
dehumidistat should not be used in this system.
Troubleshooting
Winter Setting
30% to 45%
Summer Setting
“OFF”
Optional Dehumidistat
This control will reduce winter humidity levels when outdoor
air approaches or exceeds freezing.
Page 28
28
Model Number Nomenclature Breakdown
Example Model Number CAF - U - S2A - 24 - P16
Model Configuration
CAF - Clean Air Furnace
(Built-in HRV)
AH - Air Handler
(No HRV)
Configuration
U - Upflow
D - Downflow
H - Horizontal
Hydronic Coil Size
S2A - Small Coil - 2 Row (see specifications)
S4A - Small Coil - 4 Row (see specifications)
L2A - Large Coil - 2 Row (see specifications)
L4A - Large Coil - 4 Row (see specifications)
L2B - Large Coil - 2 Row (see specifications)
00 - No Hydronics (No Heating Coil, No Pump)
* CFM (High Speed)
Cooling Capacity
Note:
Refer to individual specification
pages for Hydronic Coil and
Blower configurations.
Refer to individual specification pages for
This sheet is for pre-configured
Hydronic Coil and Blower outputs and
Model Number Breakdown only.
configurations.
ATTENTION
24 - 2 tons
30 - 2.5 tons
36 - 3.0 tons
48 - 4.0 tons
*Cooling coils not available from Nutech
Motor Configuration
P16 - Standard PSC Motor 120V/60Hz
E15 - Upgrade ECM Motor 120V/50Hz
E16 - Upgrade ECM Motor 120V/60Hz
E25 - Upgrade ECM Motor 220V/50Hz
E26 - Upgrade ECM Motor 220V/60Hz
Page 29
29
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side.
Case Prepainted galvanized steel for superior corrosion resistance.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Options
99-186 Weatherhoods, Two - 6" (150 mm) c/w
1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat
Control 24 VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Warranty
Units carry a lifetime warranty on the heat recovery
(aluminum) core, a five year warranty on the energy
recovery (enthalpic) core and a five year replacement
parts warranty on all other components.
Model CAF-U-S4A-24-P16
Voltage 120 VAC 60 Hz
Hp 1/3
Amps (total) 8
Water
1/2" (12 mm) Copper
Connections Soldered Connection
Airflow (High)
.25 in wg
1030 CFM
.5 in. wg 890 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Dimensions & Clearances
Note: Ventilation ports and return plenum
opening available off either side of cabinet. All
units conform to CSA and UL Standards.
Model CAF-U-S4A-24-P16
16”
29.5”
(749 mm)
(406 mm)
Supply Air
To p
17.25”
19”
(438 mm)
(483 mm)
Side
12"
(305 mm)
Ventilation
6"
Supply Air
(150 mm)
4”
(100 mm)
14"
(356 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
6"
(150 mm)
Inlet
Ventilation
Exhaust Air
Outlet
22”
(559 mm)
Return Air
29.5"
(749 mm)
Front
Latches
Blower Section
19"
(483 mm)
47.5"
(1207 mm
Page 30
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side
Case Prepainted galvanized steel for superior corrosion resistance.
30
Dimensions & Clearances
Model CAF-U-L4A-36-P16
Voltage 120 VAC 60 Hz
Hp 1/2
Amps (total) 10.6
Water
3/4" (19 mm) Copper
Connections Soldered Connection
Airflow (High)
.25 in wg
1350 CFM
.5 in. wg 1180 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Note: Ventilation ports and return plenum
opening available off either side of cabinet.
All units conform to CSA and UL Standards.
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat
Control 24 VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-U-L4A-36-P16
29.5"
(749 mm)
22.25"
(565 mm)
Supply Air
To p
17.25”
19”
(438 mm)
(483 mm)
Side
12"
(305 mm)
Ventilation
6"
Supply Air
(150 mm)
4”
(100 mm)
(356 mm)
Inlet
Ventilation
6"
Exhaust Air
(150 mm)
Outlet
(559 mm)
14"
Return Air
29.5"
(749 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
Front
Latches
47.5"
(1207 mm)
22”
Blower Section
19"
(483 mm)
Page 31
31
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat
Control 24 VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side
Case Prepainted galvanized steel for superior corrosion resistance.
Dimensions & Clearances
Model CAF-D-S4A-24-P16
Voltage 120 VAC 60 Hz
Hp 1/3
Amps (total) 8
Water
1/2" (12 mm) Copper
Connections
Soldered Connection
Airflow (High)
.25 in wg
1030 CFM
.5 in. wg 890 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Note: Ventilation ports and return plenum opening available off either side of cabinet.
All units conform to CSA and UL Standards.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-D-S4A-24-P16
19"
(483 mm)
19"
(483 mm)
To p
14"
(356 mm)
Bottom
(559 mm)
17.25"
(438 mm)
22"
Return Air
29.5"
(749 mm)
29.5”
(749 mm)
16"
(406 mm)
Supply Air
47.5"
(1207 mm)
19"
(483 mm)
Blower Section
Latches
Ventilation Exhaust
Air Outlet
Ventilation Supply
Air Inlet
SideFront
29.5"
(749 mm)
Return Air
22"
(559 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
14”
6”
(150 mm)
6”
(150 mm)
12"
(305 mm)
4"
(100 mm)
(356 mm)
Page 32
32
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat
Control 24 VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Note: Ventilation ports and return plenum opening available off either side of cabinet.
All units conform to CSA and UL Standards.
Dimensions & Clearances
Model CAF-D-L4A-36-P16
Voltage 120 VAC 60 Hz
Hp 1/2
Amps (total) 10.6
Water
3/4" (19 mm) Copper
Connections Soldered Connection
Airflow (High)
.25 in wg
1350 CFM
.5 in. wg
1180 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side
Case Prepainted galvanized steel for superior corrosion resistance.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-D-L4A-36-P16
19"
(483 mm)
19"
(483 mm)
To p
14"
(356 mm)
Bottom
17.25"
(438 mm)
22"
(559 mm)
Return Air
29.5"
(749 mm)
29.5"
(749 mm)
22.25"
(565 mm)
Supply Air
47.5"
(1207 mm)
(483 mm)
Blower Section
Front
19"
Ventilation Exhaust
Air Outlet
Ventilation Supply
Air Inlet
Latches
Side
29.5"
(749 mm)
Return Air
22"
(559 mm)
(305 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
6"
(150 mm)
6"
(150 mm)
12"
4"
(100 mm)
14"
(356 mm)
Page 33
33
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side.
Case Prepainted galvanized steel for superior corrosion resistance. Service drain 1/2” (12 mm) or 3/4” (19 mm) NPT.
Note: All units conform to CSA and UL Standards.
Model CAF-H-S4A-24-P16
Voltage 120 VAC 60 Hz
Hp 1/3
Amps (total) 8
Water
1/2" (12 mm) Copper
Connections
Soldered Connection
Airflow (High)
.25 in wg
1030 CFM
.5 in. wg 890 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat
Control 24 VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-H-S4A-24-P16
Dimensions & Clearances
14"
(356 mm)
To p
Return Air
29.5"
(749 mm)
19"
(483 mm)
14"
(356 mm)
22"
(559 mm)
22"
(559 mm)
Return Air
29.5"
(749 mm)
Ventilation
Exhaust
Air Outlet
6”
(150 mm)
4"
(100 mm)
Ventilation
Supply
Air Inlet
6”
(150 mm)
Return
Air End
(483 mm)
12"
(305 mm)
19"
Blower Section
17.25"
19"
(438 mm)
(483 mm)
Supply Air End
47.5"
(SERVICE CLEARANCE 10")
(1207 mm)
16"
(406 mm)
29.5"
(749 mm)
Latches
Supply Air
Front
Service
Drain
Page 34
34
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat Control 24
VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side.
Case Prepainted galvanized steel for superior corrosion resistance. Service drain 1/2” (12 mm) or 3/4” (19 mm) NPT.
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Dimensions & Clearances
Model CAF-H-L4A-36-P16
Voltage 120 VAC 60 Hz
Hp 1/2
Amps (total) 10.6
Water
3/4" ( 19 mm) Copper
Connections Soldered Connection
Airflow (High)
.25 in wg
1350 CFM
.5 in. wg 1180 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Note: All units conform to CSA and UL Standards.
Model CAF-H-L4A-36-P16
14"
(356 mm)
29.5"
(749 mm)
19"
(483 mm)
Return Air
14"
(356 mm)
22"
(559 mm)
(559 mm)
Return Air
29.5"
(749 mm)
22"
Ventilation
Exhaust
Air Outlet
6"
(150 mm)
4"
(100 mm)
Ventilation
Supply
Air Inlet
(150 mm)
Return
Air End
6"
(305 mm)
19"
(483 mm)
Side
19"
(483 mm)
12"
Supply Air End
Blower Section
(SERVICE CLEARANCE 10")
17.25"
(438 mm)
47.5"
(1207 mm)
(559 mm)
Supply Air
29.5"
(749 mm)
Latches
22"
Front
Service
Drain
Page 35
35
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat Control 24
VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Dimensions & Clearances
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for
energy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F
(-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side
Case Prepainted galvanized steel for superior corrosion resistance.
Note: Ventilation ports and return plenum
opening available off either side of cabinet.
All units conform to CSA and UL Standards.
Model CAF-U-L2A-48-P16
Voltage 120 VAC 60 Hz
Hp 1/2
Amps (total) 10.6
Water
1/2" (12 mm) Copper
Connections Soldered Connection
Airflow (High)
.25 in wg
1888 CFM
.5 in. wg 1589 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 150 lbs.
Shipping Weight 165 lbs.
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-U-L2A-48-P16
29.5"
(749 mm)
22.25"
(565 mm)
Supply Air
To p
17.25"
19"
(483 mm)
(438 mm)
Side
12"
(305 mm)
6"
Ventilation Supply
(150 mm)
6"
(150 mm)
Return Air
Air Inlet
Ventilation Exhaust
Air Outlet
22"
(559 mm)
29.5"
(749 mm)
4"
(100 mm)
14"
(356 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
Front
Latches
Blower Section
19"
(483 mm)
47.5"
(1207 mm)
Page 36
36
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat Control 24
VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for
energy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F
(-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side.
Case Prepainted galvanized steel for superior corrosion resistance.
Dimensions & Clearances
Model CAF-U-00-36-P16
Voltage 120 VAC 60 Hz
Hp 1/2
Amps (total) 10.6
*Airflow (High)
.25 in wg
1350 CFM
.5 in. wg
1180 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 115 lbs.
Shipping Weight 130 lbs.
* Airflow performance assumes an evaporator
coil static pressure loss of .25” WC
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Note: Ventilation ports and return plenum
opening available off either side of cabinet.
All units conform to CSA and UL Standards.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-U-00-36-P16
29.5"
(749 mm)
22.25"
(565 mm)
Supply Air
To p
17.25”
19”
(438 mm)
(483 mm)
Side
12"
(305 mm)
Ventilation
6"
Supply Air
(150 mm)
4”
(100 mm)
(356 mm)
Inlet
Ventilation
6"
Exhaust Air
(150 mm)
Outlet
22”
(559 mm)
14"
Return Air
29.5"
(749 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
Front
Latches
Blower Section
19"
(483 mm)
47.5"
(1207 mm)
Page 37
37
Options
99-186 Weatherhoods, Two - 6" (150 mm)
c/w 1/4" (6 mm) mesh screen
99-130W Remote Wall Mount Dehumidistat Control 24
VAC only
99-RSK6 6” (150 mm) back draft damper
99-104 DET - Digital Electronic Timer
Core Ventilation system has patented aluminum heat recovery core (standard) or an enthalpic energy recovery core (optional) for ener-
gy-efficient ventilation. Enthalpic cores are recommended for regions where the temperature does not drop below 25°F (-4°C).
Filters Washable air filters in exhaust and supply air streams of ventilation section, 1" (25 mm) pleated in return plenum side.
Case Prepainted galvanized steel for superior corrosion resistance.
Dimensions & Clearances
Model CAF-U-00-48-P16
Voltage 120 VAC 60 Hz
Hp 1/2
Amps (total) 10.6
*Airflow (High)
.25 in wg
1888 CFM
.5 in. wg 1589 CFM
Ventilation 100 - 140 CFM
Airflow
Effectiveness 70%
(Aluminum Core)
Total Efficiency 50%
(Enthalpic Core)
Net Weight 132 lbs.
Shipping Weight 147 lbs.
* Airflow performance assumes an evaporator
coil static pressure loss of .25” WC.
Warranty
Units carry a lifetime warranty on the heat recovery (aluminum) core, a five year warranty on the energy recovery
(enthalpic) core and a five year replacement parts warranty
on all other components.
Note: Ventilation ports and return plenum
opening available off either side of cabinet.
All units conform to CSA and UL Standards.
Date: ___________________________________________
Tag: _____________________Qty:___________________
Project: _________________________________________
Engineer: _______________________________________
Contractor: ______________________________________
Supplier: ________________________________________
Quote#: _________________________________________
Submitted by: ____________________________________
Model CAF-U-00-48-P16
29.5"
(749 mm)
22.25"
(565 mm)
Supply Air
To p
17.25”
19”
(438 mm)
(483 mm)
Side
12"
(305 mm)
Ventilation
6"
Supply Air
(150 mm)
4”
(100 mm)
(356 mm)
Inlet
Ventilation
6"
Exhaust Air
(150 mm)
Outlet
22”
(559 mm)
14"
Return Air
29.5"
(749 mm)
(SERVICE CLEARANCE 1') (SERVICE CLEARANCE 3')
Front
Latches
Blower Section
19"
(483 mm)
47.5"
(1207 mm)
Page 38
38
System Commissioning
This section of the manual is designed to be used with the
“Commissioning of Integrated Combo System” worksheet.
The worksheet is designed to guide you through the start-up
process in a logical, step by step method which should minimize the work and time involved in having the system meet
the designed parameters.
The following conditions are assumed:
• The air filter is in place
• All supply diffusers and return grilles are fully open and
unrestricted
• Hot water is available to the furnace
• The drain valve for the heating loop is closed
• The shut off valves for the heating loop are fully open
• The throttling valve for the heating loop (if applicable), is
fully opened
• Electrical power is available at the furnace
• The return air temperature from the house is approximately 70°F (21°C)
Page 39
39404142434445
Page 40
Page 41
Page 42
Page 43
Page 44
Page 45
Standard Motor Wiring Diagram
T20
FEED
RELAY
YELLOW
RED
54321
Fan
Motor
BLACK
BLUE
WHITE
BLUE
T18 T19
C6 C7
C5
C4
N.O.
COM
N.O.
COM
N.O.
Fan Hi Fan Med Fan Low
K3 K4 K5
COM
N.O.
K6
COM
Pump
WHITE
BLACK
BLACK
ON
Neutral
SPARE
K7 K1 K2K8
CR1
T43
N.C
F2 MAX 2 amp
TP1
T42
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
P2 P3
Digital Controls
T41
T40
T39
T38
T37
T36
T35
T34
T33
T32
T31
24Vac12Vac Com
R
Defrost
Freeze
DET
98-CAF-AH-01
Contact 2 Contact 3 Contact 4
Contact 1
T30
T29T28REDOGYWRCT25
A/C Unit
N.O. Normally open
Standard Motor CAF/Air Handler Wiring Diagram
N.C. Normally closed
COM Common
T# Terminal
P# Plug
K# Relay
F# Fuse
SW1
8 7 6 5 4 3 2 1
AUX
Line
T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
T2 T3
T1
WHITE
BLACKBLACK
SW# Switch
GND
BLACK
BLACK
Door Switch
T21 T22 T23 T24
AUX
DIP SWITCHES TO BE
ADJUSTED BY QUALIFIED
TECHNICIANS ONLY.
2
P1
MAX
12/24Vac
C1
VDR1
1
amp
1
F1
Transformer
THERMISTOR
C
T26 T27 GRNYEL
RED
BLUE
WHITE
To “ Y”
RWY G
To “ C”
Thermostat
WARNING
Do not initiate power before plumbing is
commissioned.
Page 46
46
ECM Wiring Diagram
1005
ADJUST DELAY
COOL HEAT
RED
98-CAF-ECM-01
SW1
ADJUST DELAY
HEAT
COOL
12 34 567 8
off on
T2
T1
WHITE
BLACK
PURPLE
Molex
Connectors
5
432
1
Jumper
(120 VOLT Only)
WHITE
BLACK
BLUE
BLACK/YELLOW
TAN
Pump
RED
BROWN
T20
FEED
Fan Motor
9
12345678
RELAY
N.O.
10111213141516
COM
BLUE
ORANGE
GREEN
YELLOW
N.O.
T18 T19
C6 C7
C4
COM
N.O.
Fan Hi Fan Med Fan Low
K3 K4 K5
COM
N.O.
K6
COM
SPARE
K7 K1 K2K8
T43
N.C
F2 MAX 2 amp
N.0. COM N.C. N.0. COM N.C. N.0. COM N.C. N.0 . COM
T42
P2 P3
T40
T39
T38
T37
T36
T35
T34
T33
T32
T31
24Vac12Vac Com
R
Defrost
Freeze
T41
Contact 2 Contact 3 Contact 4
Contact 1
T30
T29T28REDOGYWRCT25
THERMISTOR
PURPLE
BLUE
BROWN
TAN
GREEN
BLACK/YELLOW
YELLOW
WHITE
BLACK
RED
ECM - CAF/Air Handler Wiring Diagram
WHITE
GND
WHITE
BLACK
Neutral
ON
CR1
DET
TP1
Digital Controls
ECM
BLOCK
TERMINAL
(TBM)
A/C Unit
GO
SW1
1
To “ C”
To “ Y”
YY
8 7 6 5 4 3 2 1
Line
T4 T5 T6 T7 T8 T9 T10 T11 T12 T13 T14 T15 T16 T17
T21 T22 T23 T24
T2 T3
T1
BLACKBLACK
BLACK
BLACK
Door Switch
DIP SWITCHES TO BE
ADJUSTED BY QUALIFIED
TECHNICIANS ONLY.
2
AUX
1
AUX
1
F1
amp
MAX
12/24Vac
Transformer
P1
C1
VDR1
C
T26 T27 GRNYEL
RED
BLUE
WHITE
2
CRWW
N.O. Normally open
N.C. Normally closed
COM Common
T# Terminal
P# Plug
RWY G
K# Relay
F# Fuse
Thermostat
SW# Switch
WARNING
Do not initiate power before plumbing is
commissioned.
Page 47
47
Page 48
The new BES is the perfect way to ventilate specific locations with a Clean Air
Furnace. The BES allows you to exhaust multiple areas quietly and economically
while also providing heat recovery through the Clean Air Furnace integrated heat
recovery core.
Bathroom Exhaust System
Part # 99-CAF-BESKIT
Features
• BES Control Box
• Quantum 4/5/6
COMBI Fan
• Fan Speed
Selection
NEW!
From Lifebreath
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