Page 1
Package 1 of 1 contains:
1 - Assembled ventilator
1 - Bag assembly containing:
4 - Hanging straps
1 - Installation manual
1 - Remote electrical control box
1 - Bag containing sealant putty
Installation Tools
• tin snips • large zip ties
• assorted screw drivers • fabric flexible duct
• electric drill
- class II rated
• hammer • mastic tape
• wire strippers • alum. foil duct tape
• knife • zip ties
• caulking gun •
1
/2” I.D. drain hose
• smoke pencil
Balancing Tools
•
Pitot Tube Balancing Kit
[Case, 8 ft. vinyl tubing, Pitot tube,
magnehelic gauge (0 - 0.25”), and
mounting plate]
or
•
Pitot Tube with instructions
and Digital Manometer
(with resolution of
0 - 0.25” - must read to 1/100ths of an inch)
Optional Accessories
•
20 Minute Fan Timer
• Wall Mounted Dehumidistat
•
Weather hood Kit
• Round Diffuser
4” (100mm)
5” (125mm)
6” (150mm)
8” (200mm)
• Kitchen Grille
- may be required by code for kitchen applications
- contains removable grease filter
Heat Recovery Ventilators (HRV) are designed to provide
fresh air while exhausting an equal amount of stale air.
The HRV is equipped with an aluminum core. The device
uses the stale air that is being exhausted to condition the
fresh air as it is being brought in.
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
who have jurisdiction before installation.
Shipping and Packaging List ......................................1
Required Tools............................................................1
Application ..................................................................1
General .......................................................................1
Engineering Data.....................................................2-5
Installation Instructions ...............................................6
Clearances & Requirements.......................................7
Installation..............................................................7-10
Application Illustrations........................................11-16
Remote Control Devices...........................................17
Wiring the Controls ...................................................18
Electrical ..................................................................19
Operation ..................................................................20
Wiring Diagrams .......................................................21
Interlocking HRV to Furnace.....................................22
Air Flow Balancing...............................................24-25
Troubleshooting ........................................................26
Maintenance ............................................................27
Shipping and Packing List
Application
General
Table of Contents
Required Tools
* LEAVE FOR HOMEOWNER
NOTE: Due to ongoing research and product development, specifications,
ratings and dimensions are subject to change without notice.
TI-CCU-001
0108
Models RNC120F/120ERV
Page 2
2
3
2
1
20
40
60
80
100
120
140
0 0.1 0.2 0.3 0 .4 0.5 0.6 0 .7 0.8 0.9
Static Pressure (in w.g.)
Air Flow (c fm)
3 - High Speed
2 - Medium Low Speed
1 - Low speed
Engineering Data
Model RNC120F
THERMALLY CONDUCTIVE, PATENTED ALUMINUM CORE
The cross-flow heat recovery core transfers heat between the two airstreams. It is easily
removed for cleaning or service.
MOTORS AND BLOWERS
Each Air stream has an independent motorized impeller. 3 speed operation 120VAC
FILTERS
Washable air filters in exhaust and supply air streams.
MOUNTING THE HRV
Four threaded inserts at corners of case designed to accept four reinforced polyester
straps that are supplied with the unit.
DEFROST
Fan defrost system. Fresh air motor turns off and Exhaust motor switches to high speed
to defrost core.
CASE
Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance.
Insulated to prevent exterior condensation. Drain connection 1 -1/2" (12 mm) OD.
CONTROLS
Unit is supplied with a remote HRV control box which can be conveniently located within
3’-0” of the HRV.
HRV System Control
HRV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by
connecting remote controls to designated terminals inside electrical box of HRV.
Standard LOW SPEED SETTING can be increased to medium low.
Off (Standby)/Low or OFF/HIGH speed operation is also available.
DUCT CONNECTIONS
5” duct connections with “field” selectable standard airflow or reverse airflow for limited
room installations.
WEIGHT 42 lbs. (19 kg)
SHIPPING WEIGHT 45 lbs. (20.5 kg)
OPTIONAL ACCESSORIES
99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire)
20 gauge wire (min.) 100’ length
99-101 Crank Timer
99-116 Dehumidistat Ventilation Control - Dehumidistat with ON/OFF
99-130 Dehumidistat Control - Dehumidistat
99-185 Weatherhoods, Two - 5” (125mm) c/w1/4” (6mm) mesh screen
99-2040 20/40 ON/OFF Dehumidistat
WARRANTY
Units carry a lifetime warranty on the heat recovery core and a five year replacement
parts warranty.
All Duct Collars are
5" diameter (127 mm)
Date: ______________________________________________
Tag: ________________________ Qty: __________________
Project:_____________________________________________
Engineer: ___________________________________________
Contractor: __________________________________________
Supplier:____________________________________________
Quote#: ____________________________________________
Submitted by: ________________________________________
*Sensible Efficiency - thermal **Latent Efficiency - moisture
Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs
Performance
Net supply air flow in cfm (L/s) against external static pressure
E.S.P
(external static pressure) [cfm (L/s)]
@ 0.1" (25 Pa) 125 (59)
@ 0.2" (50 Pa) 120 (56)
@ 0.3" (75 Pa) 114 (54)
@ 0.4" (100 Pa) 109 (51)
@ 0.5" (125 Pa) 106 (50)
@ 0.6" (150 Pa) 99 (47)
@ 0.7" (175 Pa) 94 (44)
@ 0.8" (200 Pa) 89 (42)
Sensible Effectiveness
@ 65 cfm (30 L/s) 32°F (0°C) 72%
*Sensible Efficiency
@ 65 cfm (30 L/s) 32°F (0°C) 55%
*Sensible Efficiency
@ 65 cfm (30 L/s) -13°F (-25°C) 45%
VAC @ 60HZ 120
WATTS / Low speed. 63
WATTS / High speed 150
Amp rating 1.5
All units conform to CSA
and UL standards.
TOP VIEW
EXHAUST
AIR FROM
BUILDING
18”
FRESH AIR
FROM
OUTSIDE
FRESH AIR
TO BUILDING
EXHAUST AIR
TO OUTSIDE
9”
19”
SERVICE CLEARANCE FROM
BOTTOM OF UNIT IS MINIMUM 3'0"
Page 3
Engineering Data
Model RNC120F
Option 1 - Standard Duct Configuration Dimensions inches
Option2-ReverseDuct Configuration Dimensions inches
3
EXHAUST AIR
FROM BUILDING
EXHAUST
AIR FROM
BUILDING
TOP VIEW
FRESH AIR
TO BUILDING
FRESH AIR
FROM OUTSIDE
18”
FRESH AIR
FROM
OUTSIDE
EXHAUST AIR
TO OUTSIDE
9”
19”
ALL DUCT CONNECTION COLLARS ARE 5" DIAMETER
SERVICE CLEARANCE FROM
BOTTOM OF UNIT IS MINIMUM 3'0"
HANGING
STRAPS
EXHAUST AIR
TO OUTSIDE
PLUG-IN CONNECTOR
FOR CONNECTING TO
REMOTE ELECTRICAL
BOX
FRESH AIR
TO BUILDING
DRAIN
CONNECTION
TOP VIEW
FRESH AIR
FROM
EXHAUST AIR
TO OUTSIDE
OUTSIDE
18”
EXHAUST
AIR FROM
BUILDING
FRESH AIR
TO BUILDING
9”
19”
ALL DUCT CONNECTION COLLARS ARE 5" DIAMETER
FRESH AIR
FROM OUTSIDE
EXHAUST AIR
FROM BUILDING
SERVICE CLEARANCE FROM
BOTTOM OF UNIT IS MINIMUM 3'0"
HANGING
STRAPS
FRESH AIR
TO BUILDING
PLUG-IN CONNECTOR
FOR CONNECTING TO
REMOTE ELECTRICAL
BOX
EXHAUST AIR
TO OUTSIDE
DRAIN
CONNECTION
Page 4
4
Engineering Data Model 120ERV
Latent Recovery/Moisture Transfer Core
The cross flow energy recovery core transfers heat and water vapor between the two air
streams. It is easily removed for cleaning and service.
MOTORS AND BLOWERS
Each Air stream has an independent motorized impeller. 3 speed operation 120VAC.
FILTERS
Washable air filters in exhaust and supply air streams.
MOUNTING THE ERV
Four threaded inserts at corners of case designed to accept four reinforced polyester straps
that are supplied with the unit.
CASE
Twenty gauge prepainted galvanized steel (G60) for superior corrosion resistance. Insulated
to prevent exterior condensation.
CONTROLS
Unit is supplied with a remote ERV box which can be conveniently located within 3’ of the
ERV.
ERV System Control
ERV defaults to LOW SPEED when plugged in. HIGH SPEED option is accessible by connecting remote controls to designated terminals inside electrical box of ERV.
Standard LOW SPEED SETTING can be increased to medium low. Off (Standby)/Low or
OFF/HIGH speed operation is also available.
DUCT CONNECTIONS
5” duct connections with ‘field’ selectable standard airflow or reverse airflow for limited room
installations.
WEIGHT 42 lbs. (19 kg) SHIPPING WEIGHT 45 lbs. (20.5 kg)
OPTIONAL ACCESSORIES
99-132 20 Minute Fan Timer - initiates high speed ventilation for 20 minutes. (3 wire) 20
gauge wire (min.) 100’ length
99-101 Crank Timer
99-116 Dehumidistat Ventilation Control - Dehumidistat with ON/OFF
99-130 Dehumidistat Control - Dehumidistat
99-185 Weatherhoods, Two - 5” (125mm) c/w 1/4” (6mm) mesh screen
99-2040 20/40 ON/OFF Dehumidistat
WARRANTY
Units carry a lifetime warranty on the heat recovery core and a five year replacement parts
warranty.
All Duct Collars are
5" diameter (127 mm)
Date: ______________________________________________
Tag: ________________________ Qty: __________________
Project:_____________________________________________
Engineer: ___________________________________________
Contractor: __________________________________________
Supplier:____________________________________________
Quote#: ____________________________________________
Submitted by: ________________________________________
3
2
1
0
20
40
60
80
100
120
140
0 0.1 0.2 0.3 0 .4 0.5 0.6 0 .7 0.8 0.9
Static Pressure (in w.g.)
Air Flow (c fm)
3 - High Speed
2 - Medium Low Speed
1 - Low speed
*Sensible Efficiency - thermal **Latent Efficiency - moisture
Note: Effectiveness - based on temp. differential between the 2 airstreams
Efficiency - takes into account all power inputs
Performance
Net supply air flow in cfm (L/s) against external static pressure
E.S.P
(external static pressure) [cfm (L/s)]
@ 0.1" (25 Pa) 113 (53)
@ 0.2" (50 Pa) 110 (52)
@ 0.3" (75 Pa) 103 (49)
@ 0.4" (100 Pa) 99 (47)
@ 0.5" (125 Pa) 96 (45)
@ 0.6" (150 Pa) 89 (42)
@ 0.7" (175 Pa) 86 (41)
@ 0.8" (200 Pa) 81 (38)
Cooling Mode @ 50 cfm (24 L/s) 95°F (35°C)
*Sensible Effectiveness 62%
**Latent Transfer 35%
Total Efficiency 44%
Heating Mode @ 50 cfm (24 L/s) 32°F (0°C)
*Sensible Effectiveness 65%
**Latent Transfer 38%
Total Efficiency 56%
VAC @ 60HZ 120
WATTS / Low speed. 63
WATTS / High speed 150
Amp rating 1.5
All units conform to CSA
and UL standards.
TOP VIEW
EXHAUST
AIR FROM
BUILDING
18”
FRESH AIR
FROM
OUTSIDE
8”
19”
FRESH AIR
TO BUILDING
EXHAUST AIR
TO OUTSIDE
SERVICE CLEARANCE FROM
BOTTOM OF UNIT IS MINIMUM 3'0"
Page 5
5
Engineering Data Model 120ERV
Option 1 - Duct Configuration Dimensions inches
Option 2 - Duct Configuration Dimensions inches
TOP VIEW
EXHAUST
AIR FROM
BUILDING
FRESH AIR
TO BUILDING
FRESH AIR
FROM OUTSIDE
18”
FRESH AIR
FROM
OUTSIDE
EXHAUST AIR
TO OUTSIDE
8”
19”
ALL DUCT CONNECTION COLLARS ARE 5" DIAMETER
SERVICE CLEARANCE FROM
BOTTOM OF UNIT IS MINIMUM 3'0"
EXHAUST AIR
FROM BUILDING
HANGING
STRAPS
PLUG-IN CONNECTOR
FOR CONNECTING TO
REMOTE ELECTRICAL
BOX
FRESH AIR
TO BUILDING
EXHAUST AIR
TO OUTSIDE
TOP VIEW
FRESH AIR
FROM
EXHAUST AIR
TO OUTSIDE
OUTSIDE
18”
EXHAUST
AIR FROM
BUILDING
FRESH AIR
TO BUILDING
8”
19”
ALL DUCT CONNECTION COLLARS ARE 5" DIAMETER
FRESH AIR
FROM OUTSIDE
EXHAUST AIR
FROM BUILDING
SERVICE CLEARANCE FROM
BOTTOM OF UNIT IS MINIMUM 3'0"
HANGING
STRAPS
PLUG-IN CONNECTOR
FOR CONNECTING TO
REMOTE ELECTRICAL
BOX
EXHAUST AIR
TO OUTSIDE
FRESH AIR
TO BUILDING
Page 6
6
Installation Instructions
The RNC120F model can be setup in two different airflow
configurations as illustrated in the engineering data section of the manual. Because of this, it is extremely
important that the unit be connected properly. The remote
electrical control box contains two receptacles labelled
“Fan Connection A” and “Fan Connection B”. It is critical
that the proper fan be plugged into the proper receptacle.
FRESH AIR
FROM OUTSIDE
EXHAUST AIR
FROM BUILDING
FRESH AIR
FROM OUTSIDE
EXHAUST AIR
FROM BUILDING
FRESH AIR
TO BUILDING
EXHAUST AIR
TO OUTSIDE
EXHAUST AIR
TO OUTSIDE
DRAIN
CONNECTION
FRESH AIR
TO BUILDING
DRAIN
CONNECTION
Page 7
7
Location Selection
The HRV must be located in a heated space where it will
be possible to conveniently service the unit. Typically the
HRV would be located in the mechanical room or an area
close to the outside wall where the weather hoods will be
mounted. If a basement area is not convenient or does not
exist, a utility or laundry room may be used.
Attic installations are not normally recommended due to:
A) the complexity of work to install
B) freezing conditions in the attic
C) difficulty of access for service and cleaning
The HRV unit must be installed in a horizontal position as
shown in the illustration below. The unit should be suspended using the provided hanging straps. The unit must
be level for proper condensate drainage. Sufficient
clearance below the access door is required for servicing
the air filters and core. A minimum of 25" (635mm) clearance is recommended so the door can be removed. Four
PVC reinforced polyester hanging straps are provided for
hanging the HRV.
Suspending the Unit
The hanging straps should be attached to the unit at the
top end corners (mounting screws are already located on
the HRV case). Securely fasten the other end of the straps
to the ceiling making sure the UNIT IS LEVEL. The straps
are designed to reduce the possibility of noise, resonance
or harmonics; therefore using the full length of the strap
between the HRV and the floor joists is recommended.
Weatherhood Location and Installation
Weatherhood kit includes two fixed-cover hoods with a
1/4” (6mm) mesh screen.
Exhaust Weatherhood Requirements
• At least 6' (2 m) from the ventilation air intake*
• At least 18" (460mm) above ground or above the
depth of expected snow accumulation*
• At least 3' (1 m) away from the corner of the building*
• At least 3’ away from gas meter, electric meter or a
walkway where fog or ice could create a hazard*
• Not into a garage, workshop or other unheated space
Installation
Connecting Appliances to the HRV
The following appliances should not be connected to the
HRV:
• clothes dryer
• range top
• stovetop fan
• central vacuum system
NOTE: Connecting any of these to the HRV will
invalidate your warranty.
Clearances and Requirements
WARNING
Before installation, careful consideration must
be given to how this system will operate if
connected to any other piece of mechanical
equipment, i.e. a forced air furnace or air handler,
operating at a higher static. After installation, the
compatibility of the two pieces of equipment
must be confirmed, by measuring the air flows of
the ventilator, by using the balancing procedure
found in this manual.
CAUTION
It is always important to assess how the operation
of any HRV may interact with vented combustion
equipment (i.e. Gas Furnaces, Oil Furnaces,
Wood Stoves, etc.)
NEVER install a ventilator 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!
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property
damage, personal injury or loss of life.
Installation and service must be performed by a
qualified installer or service agency.
WARNING
Electric shock hazard. Can cause
injury or death. Before attempting to
perform any service or maintenance,
turn the electrical power to unit OFF
at disconnect switch(es). Unit may
have multiple power supplies.
Lint, dust or grease will collect in the HRV
damaging the unit.
Page 8
8
When installing the weather hood, its outside perimeter
must be sealed with exterior caulking.
* Local code may require greater distances.
Intake Weatherhood Requirements
• Should be located upstream (if there are prevailing
winds) from the exhaust outlet
• At least 6' (2 m) from the exhaust weather hood *
• At least 6' (2 m) away from dryer vents and air handler
exhaust (medium or high efficiency furnaces)*
• A minimum of at least 6' (2 m) from driveways, oil fill
pipes, gas meters, or garbage containers, swimming
pools*
• At least 18" (460mm) above the ground, or above the
depth of expected snow accumulation*
• At least 3' (1 m) from the inside/outside corner of the
building*
• Do not locate in a garage, attic or crawl space
* Local code may require greater distances.
Weatherhood Clearances
)
Suspending the Unit using the
Provided Hanging Straps
Weatherhood Installation
Installation
CAUTION
Unit must be installed level to ensure proper
condensate drainage. Due to the broad range of
installation and operational conditions,
consideration must be given for the possibility
of condensation forming on the unit or
connecting ducting. Objects below the
installation may be exposed to condensate.
FASTENERS
(not supplied
STRAPS
AND
DETAIL
Unit is designed for
horizontal installation
only as shown.
Using full length hanger
straps is recommended
for vibration control, but
can be shorter if required.
Note: Illustration depicts unit suspended from wood floor joists. If
a different ceiling system is used, securing straps to floor will be
different.
SCREEN
(sideview)
12"galvanized
pipesupplied
COLLARISSUPPLIEDTO
ENSUREVAPOURBARRIER
SCREWS
(supplied)
IS100%SEALEDTO
WALLPLATE
OUTSIDE CORNER
36" (1m)
recommended min.
INTAKE
18" (460mm) min.
6' (2m)
recommended min.
36" (1m)
recommended min.
EXHAUST
18" (460mm) min.
INSIDE CORNER
EXTERIOR
1/4"(6mm)SCREEN
(frontview)
WALL
1. ThermalCollarslidesovergalvanized
sleeveofWeatherhood.
2. FastenThermalCollartoBelt.
3. SlidetheInsulatedFlexibleDuctingover
theWeatherhood'sgalvanizedsleeveand
fastenittotheThermalCollar.
4. Hoodishingedtoallowforeasyaccess
forcleaningofbirdscreen.
CAUTION
Weather hood arrangement - requires a minimum
of 6’ (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
Page 9
9
Air Duct Design and Installation
A well designed and installed ducting system will allow the
HRV to operate at its maximum efficiency.
Always try to keep duct runs as short and straight as possible. See Installation Diagrams for various installation
options.
The inner and outer liners of the flexible insulated duct
must be clamped to the sleeve of the weather hoods (as
close to the outside as possible) and the appropriate port
on the HRV. It is very important that the fresh air intake
line be given special attention to make sure it is well
sealed. A good bead of high quality caulking (preferably
silicone sealant) will seal the inner flexible duct to both the
HRV port and the weather hood prior to clamping with a
large zip tie.
To minimize air flow restriction, the flexible insulated duct
that connects the two outside weather hoods to the HRV
should be stretched tightly and be as short as possible.
Twisting or folding the duct will severely restrict air flow.
See below for the recommended connection of flexible
insulated ducts to the the outside weather hoods and the
HRV.
Installing the Ducting Between
the HRV & Living Areas in the Home
To maximize airflow in the duct system, all ducts should
be kept short and have as few bends or elbows as possible. Forty-five degree elbows are preferred to 90° elbows.
Use “Y” tees instead of 90° elbows whenever possible.
All duct joints must be fastened with screws, rivets or duct
sealant and wrapped with mastic or a quality duct tape to
prevent leakage. Mastic is preferred but if duct tape is
used, we recommend aluminum foil duct tape.
Galvanized ducting from the HRV to the living areas in the
house is recommended whenever possible, although flexible duct can be used in moderation if necessary.
To avoid possible noise transfer through the duct system,
a short length (approximately 12 inches or 300mm) of nonmetallic flexible insulated duct should be connected
between the HRV and the supply/exhaust duct system.
The main supply and return lines to/from the HRV must be
the same size or larger than the duct connection collar.
Branch lines to the individual rooms may be as small as 4
inches (100mm), but 5 inch (125mm) lines are preferred .
All ducts running through attics and unheated spaces must
be sealed and insulated to code.
Fresh Air Ducting
In applications that do not include an air handler, fresh air
should be supplied to all bedrooms and living areas,
excluding bathrooms, kitchen and utility areas. Grilles
should be located high on a wall or in ceiling locations.
Grilles that diffuse the air comfortably such as the Round
Diffuser are recommended.
If the floor is the only option available, then special care
should be taken in locating grilles. Areas such as under
baseboard heaters will help to temper the air. Also optional inline duct heaters are available for mounting in the
supply duct work to add heat if required.
Direct Connection to Air Handler Duct System
Should you wish to hard duct the fresh air from the HRV
directly into the cold air return of the air handler, remember to check the air flow balance of the HRV with the air
handler fan both "ON" and "OFF" to determine that it does
not imbalance the unit more than 10%.
Indirect Connection to Air Handler Duct System
If permitted by local codes, an indirect connection may be
made between the HRV fresh air duct and the air handler
return plenum. The fresh air from the unit may be directed
at a grille installed in the cold air return duct of the air handler. The fresh air outlet from the HRV should be no closer
than 4 inches (100mm) and no more than 12 inches
(300mm) from the grille.
Installation
WARNING
Include a short length of fabric, flex duct or
other non-metallic connector in the “Fresh Air to
Building” hard ducted line in order to keep the
HRV separately grounded (electrically) from the
air handler. This will avoid a possible shock
hazard to service people if a short to ground
develops in one of the devices.
FRESH AIR
FROM HRV
HRV
4" MINIMUM
12" MAXIMUM
RETURN AIR
DUCT FOR
AIR HANDLER
Page 10
10
Stale Air Exhaust System
The stale air exhaust system draws air from the points in
the house where the worst air quality problems occur.
Stale air ducts should be installed in the bathroom,
kitchen, and laundry room. Applications such as greenhouses, atriums, swimming pools, saunas, etc. have
unique ventilation requirements which should be
addressed with an isolated ventilation system. Also, the air
handler return duct may be used to exhaust from. In this
method, the exhaust air is not ducted back to the HRV
with "dedicated lines" from bathrooms, kitchens, etc.
Instead, the exhaust air is drawn out of the cold air return
of the air handler. The air handler blower must be run-
ning when the unit is operating for this system to be
effective.
Balancing Dampers and Grilles
Balancing dampers and/or adjustable grilles should be
used to balance the flow rates into and out of various
rooms.
Grilles or diffusers should be positioned high on the wall or
in the ceiling. Kitchen exhaust grilles must never be connected to a range hood. They should be installed at least 4
feet (1.2m) horizontally away from the stove. A hinged
6”X10” (150 X 250mm) rectangular kitchen exhaust grille
is available. This grille includes a removable grease filter.
Canadian building codes require that kitchen grilles be
equipped with washable filters.
Field-supplied balancing dampers should be installed
external to the unit to balance the amount of stale air
being exhausted with the amount of fresh air being
brought into the house. Refer to Air flow Balancing section.
The Round
Diffuser is available in
4" (100mm)
5” (125mm)
6" (150mm)
8" (200mm)
Drain Connection (HRV Only)
During a defrost cycle, the HRV may produce some condensation. This water should flow into a nearby drain, or
be taken away by a condensate pump.
The HRV has a condensate pan and drain spout built into
the door. Construct a P-Trap by creating a loop in the
drain. This creates a “trap” which will hold some condensate and prevent odours from being drawn up the hose
and into the fresh air supply of the HRV.
AIR FLOW
SUPPLY
AIR FLOW
EXHAUST
Round
Diffusers
Kitchen Grille
REMOVABLE
FILTER
"P" Trap (HRV only)
Note: Secondary drain pan may be required to
protect from condensate leakage.
Installation
CAUTION
CAUTION
The HRV and all condensate lines must be
installed in a space where the temperature is
maintained above the freezing point.
CAUTION
Drain trap and tubing MUST be below bottom of
door with 1/4" per foot downwards slope away
from unit.
Page 11
11
DIRECT CONNECTION of the SUPPLY AIR STREAM to the AIR HANDLER COLD AIR RETURN
(Stale air drawn from key areas of home)
Air
Handler
Outdoors
*Unit is normally balanced on HIGH speed
with air handler blower ON.
High efficiency filter
or electronic air cleaner
Cool Air
Return
NOTES:
1. Air handler blower may be required to operate when HRV is on to provide good air distribution.
2. Weather hood arrangement is for drawing purposes only. 6' (2m) minimum separation required.
18" (460mm) above grade minimum or above anticipated snow level .
3. Due to the differences in pressure between the HRV and the equipment it is being
connected to, the HRV air flow must be confirmed on site, using the balancing
procedure found in the installation manual.
Return Air
3’ min.
recommended
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.
WARNING
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
CAUTION
● Stale air drawn from key areas of
home (bathroom, kitchen, laundry)
● Fresh air supplied to return
air duct of air handler
Partially Dedicated System for HRV
HRV must be balanced.
WARNING
Fresh Air From Outside
Field-supplied
Balancing Damper
(optional)
STALE AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).
Fresh Air to Building
Exhaust Air to Outside
Application Illustrations HRV–Option 1
Page 12
12
DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the AIR HANDLER COLD AIR RETURN
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.
WARNING
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
CAUTION
• It is mandatory that the air handler blower
run continuously or HRV operation be
interlocked with the air handler blower.
• Check local codes/authority having
jurisdiction for acceptance.
Simplified Installation for HRV
(Return/Return Method)
NOTES:
1. Air handler blower must operate when ventilation from HRV is required.
The air handler should be set to run continuously or interlocked with HRV.
2. A minimum separation of 40 inches (1m) is required between the two direct connections.
3. The exhaust air connection should be upstream of the
supply air connection to prevent
exhausting any fresh air.
4. Weather hood arrangement is for drawing purposes only. Six feet (2m) minimum separation required.
18" inches (460mm) above grade minimum or above anticipated snow level.
5. Due to the differences in pressure between
the HRV and the equipment it is being
connected to, the HRV's air flow must be confirmed on site, using the balancing
procedure found in the installation manual.
HRV must be balanced.
WARNING
Air
Handler
*Unit is normally balanced on
HIGH speed with air handler
blower ON.
Cool Air
Return
Return Air
3'
(915 mm)
min.
recommended
40" (1m) MINIMUM
High efficiency filter
or electronic air cleaner
Field-supplied Balancing Damper (optional)
Outdoors
Fresh Air From Outside
Fresh Air to Building
Exhaust Air to Outside
Application Illustrations HRV–Option 1
Page 13
13
Application Illustrations HRV–Option 1
Fully Dedicated System for HRV
● Stale air drawn from key areas of
home (bathroom, kitchen, laundry)
WARNING
● Fresh air supplied to main living
areas of home
Outdoors
STALE AIR from
various parts of home.
i.e. bathrooms
(if required),
kitchens
(if required).
Fresh Air From Outside
HRV must be balanced.
Exhaust Air To Outside
Field-supplied Balancing Damper (optional)
Fresh air to house main living areas...
bedrooms, living room,
rec. room etc.
*Unit is normally balanced on HIGH speed
with air handler blower ON.
NOTES:
1. Weather hood arrangement is for drawing purposes only. 6' (2m) minimum separation required.
18" (460mm) above grade minimum or above anticipated snow level .
2. The HRV air flow must be confirmed on site, using the balancing procedure found in the installation manual.
WARNING
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
heater, gas dryer, stove, fire place etc.
appliance, i.e. furnace, hot water
CAUTION
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
Page 14
14
DIRECT CONNECTION of the SUPPLY AIR STREAM to the AIR HANDLER COLD AIR RETURN
(Stale air drawn from key areas of home)
Air
Handler
Outdoors
*Unit is normally balanced on HIGH speed
with air handler blower ON.
High efficiency filter
or electronic air cleaner
Cool Air
Return
NOTES:
1. Air handler blower may be required to operate when HRV is on to provide good air distribution.
2. Weather hood arrangement is for drawing purposes only. 6' (2m) minimum separation required.
18" (460mm) above grade minimum or above anticipated snow level .
3. Due to the differences in pressure between the HRV and the equipment it is being
connected to, the HRV air flow must be confirmed on site, using the balancing
procedure found in the installation manual.
Return Air
3’ min.
recommended
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.
WARNING
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
CAUTION
● Stale air drawn from key areas of
home (bathroom, kitchen, laundry)
● Fresh air supplied to return
air duct of air handler
Partially Dedicated System for HRV
HRV must be balanced.
WARNING
Fresh Air From Outside
Field-supplied
Balancing Damper
(optional)
STALE AIR from various parts of home.
i.e. bathrooms (if required), kitchens (if required).
Fresh Air to Building
Exhaust Air to Outside
Application Illustrations HRV–Option 2
Page 15
15
DIRECT CONNECTION of both the HRV SUPPLY AIR STREAM and
EXHAUST AIR STREAM to the AIR HANDLER COLD AIR RETURN
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
appliance, i.e. furnace, hot water
heater, gas dryer, stove, fire place etc.
WARNING
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
CAUTION
● It is mandatory that the air handler blower
run continuously or HRV operation be
interlocked with the air handler blower.
● Check local codes/authority having
jurisdiction for acceptance.
Simplified Installation for HRV
(Return/Return Method)
NOTES:
1. Air handler blower must operate when ventilation from HRV is required.
The air handler should be set to run continuously or interlocked with HRV.
2. A minimum separation of 40 inches (1m) is required between the two direct connections.
3. The exhaust air connection should be upstream of the supply air connection to prevent
exhausting any fresh air.
4. Weather hood arrangement is for drawing purposes only. Six feet (2m) minimum separation required.
18" inches (460mm) above grade minimum or above anticipated snow level.
5. Due to the differences in pressure between the HRV and the equipment it is being
connected to, the HRV's air flow must be confirmed on site, using the balancing
procedure found in the installation manual.
HRV must be balanced.
WARNING
Fresh Air From Outside
Air
Handler
*Unit is normally balanced on
HIGH speed with air handler
blower ON.
Cool Air
Return
High efficiency filter
or electronic air cleaner
Outdoors
Exhaust Air to Outside
Return Air
3’
(915 mm)
min.
recommended
40" (1m) MINIMUM
Field-supplied Balancing Damper (optional)
Fresh Air to Building
Application Illustrations HRV–Option 2
Page 16
16
Application Illustrations HRV–Option 2
Fully Dedicated System for HRV
● Stale air drawn from key areas of
home (bathroom, kitchen, laundry)
WARNING
● Fresh air supplied to main living
areas of home
Outdoors
Fresh Air From Outside
STALE AIR
various parts of home.
i.e. bathrooms
(if required),
kitchens
(if required).
from
HRV must be balanced.
Exhaust Air To Outside
Field-supplied Balancing Damper (optional)
Fresh air to house main living areas...
bedrooms, living room,
rec. room etc.
*Unit is normally balanced on HIGH speed
with air handler blower ON.
NOTES:
1. Weather hood arrangement is for drawing purposes only. 6' (2m) minimum separation required.
18" (460mm) above grade minimum or above anticipated snow level .
2. The HRV air flow must be confirmed on site, using the balancing procedure found in the installation manual.
WARNING
Defrost air port needs to be drawn from clean
area without combustion appliances. To avoid
backdrafting of combustion products, never
draw
defrost air from a room with a naturally
aspirated
heater, gas dryer, stove, fire place etc.
appliance, i.e. furnace, hot water
CAUTION
Weather hood arrangement - requires a minimum
of 6' (2m) separation and a minimum of 18" (460mm)
clearance above grade or anticipated snow level.
Page 17
17
Ventilation Dehumidistat
PART NO. 99-116
The High/Low Speed Switch initiates High or Low speed ventilation. This control also has an ON/OFF Switch and a
Dehumidistat Dial (refer to "The ON/OFF Switch" and "The
Dehumidistat Dial" descriptions).
Remote Dehumidistat
PART NO. 99-130 White
The Remote Dehumidistat activates high speed ventilation when
the indoor humidity level exceeds the set point.
Remote Control Devices
20 Minute Timer
PART NO. 99-132
Connects to RED, BLACK and GREEN
(LED drive) terminals. Use a minimum of
three 20 gauge low voltage wire. Connect
up to 4 on 100 ft (91 m) wire max. Mounts
ina2x4box.
Optional Main Controls
The amount of ventilation required in your home will fluctuate
according to the activity level in the house. Higher activity levels
require more ventilation.
Main controls can be mounted in a central location of the home
(i.e. beside the furnace thermostat) which will provide the user
with complete control over their ventilation system from a convenient location.
The ON/OFF Switch
The ON/OFF Switch will turn the HRV ON or OFF. Controls with
an ON/OFF switch can be modified to ON/Standby by adjusting
the circuit board DIP Switches (Refer to "Mode DIP Switch
Settings").
The Dehumidstat Dial
Main controls feature a dehumidistat dial. The dehumidistat is
used to reduce high winter humidity levels. The dehumidistat
activates high speed ventilation when the indoor humidity level
exceeds selected setting.
Optional Timers
Timers should be present when the HRV is exhausting from
specific locations i.e bathrooms, laundry rooms. The 20 Minute
Timer is the best selection, however, the crank timer will be necessary if only 2 lead low voltage wires are present.
Dehumidistat
Dial
High/Low
Speed Switch
ON/OFF
Switch
Crank Dial
Rotate the dial for up to 60
minutes high speed operation.
20/40 ON/OFF Dehumidistat
PART NO. 99-2040
The 20/40 Switch will toggle from continuous low speed ventilation to an intermittent mode of 20 minutes fan ON (in low speed)
and 40 minutes fan OFF. The Dehumidistat Dial will initiate High
Speed ventilation when the indoor humidity level exceeds the set
point (regardless position of the 20/40 Switch.). This control also
has an ON/OFF Switch (refer to "The ON/OFF Switch" description).
Dehumidistat
Dial
20/40
Switch
ON/OFF
Switch
Dehumidistat
Dial
Crank Timer
PART NO. 99-101
Connects to RED and BLACK terminals. Use a two 18 gauge low
voltage wire. Mounts ina2x4box.
The crank timer provides a solution
to installing a system where only 2
wires are present for the timers.
20 Minute Status Lights
The 20 Minute Status Light indicates
high speed operation is activated.
Touch Pad
The Touch Pad initiates high speed
operation.
DEHUMIDISTAT
ATTENTION
Only one main control can be installed on your
system.
Off
10
20
30
60
40
50
Page 18
18
Wiring the Controls
Controls will use 2, 3 or 4 lead 20 gauge wire. Note
the number of leads required for each control (refer
to the above illustrations).
Remove
factory
installed
jumper when
installing this
control
Factory
installed
jumper
Dehumidistat Ventilation Control
Part No. 99-116
Red to Red
Orange to
Orange
Black to
Black
Circuit Board
Terminal Strip
Remote Dehumidistat
Part No. 99-130W
Red to Red
Black to Black
DEHUMIDISTAT
Remove
factory
installed
jumper when
installing this
control
Remove
factory
installed
jumper when
installing
this control
2040 ON/OFF Dehumidistat
Part No. 99-2040
Red to Red
Orange to
Orange
Black to Black
Low Fan
to Blue
Circuit Board
Terminal Strip
Recirculation Control
Part No. 99-RECIRC
Red to Red
Orange to
Orange
Black to Black
Recirculate
to Blue
Factory
installed
jumper
Circuit Board
Terminal Strip
20 Minute Timer
(shown in a Decora cover plate)*
Red to Red
Black to
Black
Green LED
Drive to Green
Circuit Board
Factory
installed
jumper
ATTENTION
Circuit Board
Terminal Strip
Crank Timer
Part No. 99-101
Circuit Board
Red to Red
Black to
Black
Off
10
20
60
50
30
40
Page 19
19
The HRV unit should be plugged into a standard designated (120VAC) electrical outlet with a ground. The outlet
should be serviced by a separate 15 amp/120V circuit. An
extension cord should not be used with this appliance. A
qualified service technician should make any required
electrical connections.
Remote Control Connections
Prior to connecting remote devices, it is advisable to
run self test on the HRV/ERV.
Low voltage connections between the remote controls, the
dehumidistat, or the fan timer should be made by a qualified service technician. Low voltage wires from the remote
controls are connected to the HRV micro-processor board.
Electrical
WARNING
In order to prevent electric shock when cleaning
or servicing the HRV, it is extremely important to
confirm the polarity of the power line that is
switched by the safety (disconnect) switch. The
hot line (black) is the proper line to be switched.
To confirm the proper polarity, use a voltmeter
or test lamp to ensure there is no power after
the switch when the door is open. Check
between that point and ground (on the cabinet).
Always make sure that the HRV is properly
grounded.
Page 20
20
Operation
Self Test
The ventilator will automatically initiate a self test
sequence when power is applied. Fan motor is cycled and
then damper motor is cycled. Duration: Approximately 1.5
mins.
How much ventilation do I need?
During seasons when your windows and doors are closed
(winter and summer if air conditioned) the HRV should
operate continuously when the dwelling is occupied, and
either continuously or intermittently when not occupied.
For most installations the HRV will normally be set to operate continuously on low speed. To suit various lifestyles,
the HRV offers a selection of operating modes.
Method of Operation
Good - intermittent operation at all times
Better- continuous operation during day or occupied
conditions, intermittent at night or unoccupied
Best - recommended continuous operation of both
HRV and furnace/air handler blower
Figure1-Factory DIP Switch Settings
The factory setting of the DIP switches (located on the circuit board) provides continuous low speed ventilation.
Optional Remote Controls will initiate high speed ventilation.
Remote controls with an ON/OFF switch (refer to "Remote
Control Devices" in this manual) will shut the entire system down when the remote control is in the OFF position.
Changing the remote control from OFF to STANDBY can
be achieved by Setting the DIP Switch as per Figure 2.
Figure 2-DIP Switch Settings for Standby (When
using a Remote Control Device that has an
ON/OFF Switch)
This DIP Switch Setting can be adjusted when using a
system control that has an ON/OFF switch (refer to
"Remote Control Devices" in this manual). "STANDBY" is
achieved when the Remote Control Switch is in the "OFF"
position. The Dehumidistat and Timers will initiate high
speed ventilation regardless of the "ON/OFF" switch position when this DIP switch configuration is used.
Mode DIP Switch Settings
The ventilator automatically operates on its lowest speed
when plugged in or switched on. This setting is factory
supplied from an autotransformer with two selectable low
speeds. To switch to a continuous medium low speed, an
installing contractor must interchange the red and blue
wires from the autotransformer inside the electrical box.
Whether or not this change is made, the HRV will only be
able to access a single selected low speed.
High speed is available with the use of optional remote
controls connected to the appropriate terminals inside the
electrical box.
Increasing Low Speed to Medium Low
Figure 2
Figure 1
HS
REMOTE
DFR2
DFR3
ON
HS
REMOTE
DFR2
DFR3
ON
ATTENTION
Figure 2 may not meet building code conformance
in certain geographical areas. Check with your
local building authority.
Page 21
21
Wiring Diagrams HRV CONTROL BOX
FAN B
FAN A FAN B
FAN A
Page 22
22
When using the Interface relay contacts to initiate blower operation on a furnace, certain thermostats will initiate the outdoor cooling condenser when
R and G are closed.
Use this wiring configuration to prevent the Interface relay contacts from initializing
the condenser unit. This problem can occur at the thermostat because the Y
termi-
nal is connected to the G
terminal internal to the stat. When R and G are closed at
the furnace (by dehumidistat or relay) 24 Volts is sent to G
at thermostat. 24 Volts is
then sent through Y
which will initiate outdoor condenser.
Interlocking HRV Operation to an Airhandler/Furnace Blower
Page 23
23
The fan defrost HRV is equipped with an electronically
controlled fan defrost system to remove frost that collects
on the warm air side of the aluminum heat transfer surfaces of the heat exchanger core. When the outside air
temperature drops below 27°F (3°C), defrost is activated
which provides for an automatic defrost cycle. During the
automatic defrost cycle, the fresh air supply is shut off
while the exhaust fan continues to operate. This allows the
warm inside air to flow through the heat exchanger core
melting frost accumulation. After the defrost period, the
fresh air supply fan returns to the normal speed and fresh
outside air continues to be drawn into the building. Water
from the melted frost collects in the bottom of the drip
pans and drains out through the bottom drain connections.
The defrost cycle repeats automatically until the air temperature rises above 27°F (-3°C).
Defrost Operation
Dehumidistat Operation (HRV only)
The optional HRV remote controls include a dehumidistat
which controls humidity levels during the heating season.
The control has a selector knob with set points ranging
from 20% to 80% relative humidity (RH). Most people are
comfortable when indoor relative humidity levels are in a
range from 30 to 45%.
The dehumidistat switches the ventilator to high speed
when the moisture level in the building exceeds the
desired setpoint. The dehumidistat switches the HRV back
to low speed ventilation when the humidity has been
reduced below the setpoint. The dehumidistat should
only be used during the heating season. It must be set
to OFF position throughout the rest of the year.
Defrost Cycle DIP Switch Settings
Defrost DIP Switch Settings (located on the circuit board)
can be adjusted to increase the unit’s run (ventilation)
time. The three minute defrost time cannot change.
Factory Setting
3 minute defrost time
17 minute run time
Option 1*
3 minute defrost time
25 minute run time
ON
HS
REMOTE
DFR2
DFR3
OFF ON
SW1
HS
REMOTE
DFR2
DFR3
SW1
*Lengthening the run time may result in ice build-up on the core.
ON
Option 2*
3 minute defrost time
30 minute run time
HS
REMOTE
DFR2
DFR3
ON
OFF
ON
SW1
Page 24
24
It is necessary to have balanced air flow 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 flow is 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 HRV properly may void warranty
Excessive negative pressure
may have several undesirable effects. In
some geographic locations, soil gases such as methane and radon gas
may be drawn into the home through basement/ground contact areas.
Read the Application Warning in Clearances & Requirements section
of this manual!
Prior to balancing, ensure that:
1. All sealing of the duct 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. Air flow in branch lines to specific areas of the house should be
adjusted first prior to balancing the unit. A smoke pencil used at the
grilles is a good indicator of each branch
line's relative air flow.
6. 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.
7. Return unit to appropriate fan speed for normal operation
8. A field-supplied balancing damper for the stale air side is required for
system balancing.
Balancing Procedure
The following is a method of field balancing an HRV using a Pitot tube,
which is advantageous in situations when flow stations are not installed
in the duct system. Procedure should be performed with the HRV on
high speed.
The first step is to operate all mechanical systems on high speed,
which
have an influence on the ventilation system, i.e. the HRV itself and the air
handler, if applicable. This will provide the maximum pressure that the
HRV will need to overcome, and allow for a more accurate balance of the
unit.
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 digital
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 end of the
Pitot is connected to the high pressure side of the gauge. The tube coming out of the branch 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 air flow.
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 air
flow (highest reading on the gauge). Then damper that air flow back to
match the lower reading from the other duct. The flow should now be
balanced.
Actual air flow can be determined from the gauge reading. The
value read
on the gauge is called the 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 in either feet per minute or
meters per second. To determine the actual air
flow, the velocity is multi-
plied by the cross sectional area of the duct being measured.
This is an example for determining the air flow in a 6" duct.
The Pitot tube reading was 0.025 inches of water.
From the chart, this is 640 feet per minute.
The 6" duct has
a cross sectional area of
= [3.14 x (6"÷12)
2
]÷4
= 0.2 square feet
The air flow 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 0.14
6 0.20
7 0.27
The accuracy of the air flow 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.
Air Flow Balancing
CAUTION
Ensure balanced air flow in HRV. Excessive
positive pressure may drive moist indoor air into
the external walls of the building where it may
condense (in cold weather) and degrade
structural components. May also cause key
holes to freeze up.
WARNING
Ensure balanced air flow in HRV. Excessive
negative pressure may also cause the backdrafting of vented combustion equipment.
Page 25
Placement of Pitot Tube HRV
Pitot Tube and Gauge
Pitot Tube Air Flow
Balancing Kit
with magnehelic gauge,
Pitot tube, hose and
carry case.
NOTE: Graphic is for illustrative purposes only.
Duct connection ports may vary.
NOTE: Apply use of balancing dampers as required.
25
Air Flow Balancing
AIR
FLOW
Pitot tube
High Pressure Side
DUCT
Magnehelic gauge
MAGNEHELIC
Low Pressure Side
MAGNEHELIC
MAGNEHELIC
Page 26
Troubleshooting
26
Poor Air Flow
Supply air feels cold
Dehumidistat is not Operating
Humidity Levels are too High in Winter
Condensation is appearing on the
windows
Humidity Levels are too Low
HRV and / or Ducts Frosting up
Condensation or Ice Build Up in
Insulated Duct to the Outside
Water in the bottom of
the HRV
20 Minute Timer Not Working
• 1/4” (6mm) mesh on the outside hoods is plugged
• filters plugged
• core obstructed
• house grilles closed or blocked
• dampers are closed if installed
• poor power supply at site
• duct is restricting HRV
• improper speed control setting
•HRV air flow improperly balanced
• poor location of supply grilles, the air flow may irritate
the occupant
• outdoor temperature extremely cold
• improper connection to ventilator
• external low voltage is shortened out by a staple or nail
• check dehumidistat setting it may be on OFF
• dehumidistat is set too high
.• lifestyle of the occupants
• moisture coming into the home from an unvented or
unheated crawl space
• moisture is remaining in the washroom/bathroom and
kitchen areas
• condensation seems to form in the spring and fall
•HRV is set at too low a speed
• dehumidistat control set too low
•blower speed of HRV is too high
• lifestyle of occupants
•HRV air flow may be improperly balanced
•HRV air flow is improperly balanced
• malfunction of the HRV defrost system
• incomplete vapor barrier around insulated duct
• a hole or tear in outer duct covering
• drain pans plugged
• improper connection of HRV drain lines
• HRV is not level
• drain lines are obstructed
• HRV heat
exchange core is not properly installed
• Wiring
• Faulty control
• Faulty circuit board
• clean exterior hoods or vents
• remove and clean filter
• remove and clean core
• check and open grilles
• open and adjust dampers
• have electrician check supply voltage at house
• check duct installation
• increase the speed of the HRV
• have contractor balance HRV
• locate the grilles high on the walls or under the baseboards,
install ceiling mounted diffuser or grilles so as not to directly
spill the supply air on the occupant (eg. over a sofa)
• turn down the HRV supply speed. A small duct heater (1kw)
could be used to temper the supply air
• placement of furniture or closed doors is restricting themovement of air in the home
• if supply air is ducted into air handler return, the air handler fan
may need to run continuously to distribute ventilation air comfortably
• check that the correct terminals have been used
• check external wiring for a short
• set the dehumidistat at the desired setting
• set dehumidistat lower
• avoid hanging clothes to dry, storing wood and venting clothes
dryer inside. Heating wood may have to be moved outside
• vent crawl space and place a vapor barrier on the floor of the
crawl space
• ducts from the washroom/bathroom should be sized to remove
moist air as effectively as possible, use of a washroom/bathroom fan for short periods will remove additional moisture
• timer or fan can be added to washroom/bathroom exhaust
• on humid days, as the seasons change, some condensation
may appear but the home’s air quality will remain high with
some HRV use
• increase speed of the HRV
• set dehumidistat higher
• decrease HRV blower speed
• humidity may have to be added through the use of humidifiers
• have a contractor balance HRV air flow
• Note: minimal frost build-up is expected on cores before
unit initiates defrost cycle functions
• have HVAC contractor balance the HRV
• ensure working properly.
• tape and seal all joints
• tape any holes or tears made in the outer duct covering
• ensure that the vapor barrier is completely sealed
• ensure O-Ring on drain nozzle sits properly
• look for kinks in line
• check water drain connections
• make sure water drains properly from pan
• disconnect external controls and run unit through self test. If
the unit runs through self test successfully, then the circuit
board is okay.
• check wiring connection.
• make sure wires are connected to proper terminals.
• test 20 Minute Timer, press and hold the button for 10 seconds
then release. The unit should run on high speed and then return
to normal operation when the button is released.
Symptom Cause Solution
Page 27
1. Inspect Exterior Hoods at least once a month.
Make sure exhaust and fresh air supply hoods are not
blocked or restricted by leaves, grass, or snow. In winter, it
is especially important to make sure snow is not blocking
the hoods or that frost has not built up on the wire mesh
(bird screen).
WARNING: Blockage of hoods may cause an imbalance.
2. Clean Air Filters - Twice a Year
The standard filters equipped with your HRV are removable and washable.
a) simply open access door and slide core out
b) remove filters
c) rinse with water or a combination of mild soap and
water. Do not clean in the dishwasher
d) to re-assemble, place clean filter(s) (wet or dry) back
into their positions against the core and return clips to
their original position
e) slide core back into its original position
3. Clean Core - Twice a Year
a) open access door
b) rotate keeper clips and carefully grip ends of core and
pull evenly outward.
-core may be snug, but will slide out of the channel
c) once removed from the cabinet remove filters
d) wash core in warm soapy water
(do not use dishwasher)
e) install clean core
f) install the clean filters
Note: Core installation label on the outer end of the core.
To install the clean core:
a) first mount the bottom flange of the core guide into the
bottom H channel approximately 1/4” (6mm)
b) mount the left or right side flange of the core guide
approximately 1/4” (6mm) followed by the other side
c) mount the top flange of the core guide into the top H
channel approximately 1/4” (6mm)
d) with all four corners in place and the core straight and
even, push hard in the center of the core until the core
stops on the back of the cabinet
e) rotate core clips to lock core in place
NOTE: Core will appear to stick out from cabinet approxi-
mately 1/8” (3mm). This is designed this way so that the
access door will fit tight against the core.
4. Motors - Maintenance Free
5. Drain (condensate) Line - Clean Once a Year
Inspect drain line, drain spout and “P” trap for blockage,
mold or kinks. Flush with warm soapy water and replace if
worn, bent or unable to clean.
6. Clean Duct System if Required
The duct system running to and from the HRV may accumulate dirt. Wipe and vacuum the duct once every year.
You may wish to contact a Heating/Ventilation company to
do this.
7. General Maintenance - Twice a Year
Wipe down the inside of the cabinet with a damp cloth to
remove dirt, bugs and debris that may be present. Pay
special attention to the drain pan and ensure water flow
path is not blocked.
8. Cleaning the Fans
Fans may accumulate dirt causing an imbalance and/or
excessive vibration of the HRV. A reduction in the air flow
may also occur. In new construction this may result within
the first year due to heavy dust and may occur periodically
after that over time depending on the outdoor conditions.
• unplug the HRV and open the service door
• remove the core
• use a small brush, such as a toothbrush or pipe
cleaner, and insert first. Scrub individual fan blades until
clean. Avoid moving or damaging balancing flat weight,
clip is usually found on one or more of the fan blades
• vacuum and wipe
Before attempting this task, thought should be given
to having a qualified service technician complete the
service work.
Maintenance HRV
27
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28
Date Maintenance Performed Contractor
Maintenance Record
Note: It is important to maintain this product regularly to ensure optimal performance.
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