ERVBBLHA
ENERGY RECOVERY VENTILATOR
SIZES 1150 AND 1200
Installation Instructions
TABLE OF CONTENTS
PAGE
SAFETY CONSIDERATIONS 1.........................
INTRODUCTION 1...................................
INSTALLATION CONSIDERATIONS 1...................
COMPONENT DESCRIPTIONS 2.......................
UNIT INSTALLATION 2...............................
WALL CONTROL 3...................................
ELECTRICAL CONNECTIONS 5........................
ACCESSORIES 5.....................................
BALANCING ERV 5..................................
VENTILATION EVALUATION 6........................
CONTROL BOARD OPERATION 6......................
CARE AND MAINTENANCE 7.........................
TROUBLESHOOTING 9...............................
WIRING DIAGRAM 10................................
A07619
Fig. 1 -- ERVBBHA Energy Recovery Ventilator
NOTE: Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury or property
damage. Consult a qualified installer, service agency or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Have a fire extinguisher available. Read these
instructions thoroughly and follow all warnings and cautions
included in literature and attached to the unit. Consult local
building codes and the current edition of the National Electrical
Code (NEC) NFPA 70.
In Canada, refer to the current editions of the Canadian Electrical
Code CSA C22.1.
Recognize safety information. When you see this symbol
the unit and in instructions or manuals, be alert to the potential for
personal injury. Understand the signal words DANGER,
WARNING,andCAUTION. These words are used with the
safety--alert symbol. DANGER identifies the most serious hazards,
which will result in severe personal injury or death. WARNING
signifies hazards, which could result in personal injury or death.
CAUTION is used to identify unsafe practices, which may result
in minor personal injury or product and property damage. NOTE
is used to highlight suggestions which will result in enhanced
installation, reliability, or operation.
on
INTRODUCTION
The ERVBBHA Energy Recovery Ventilator is used to exchange
indoor stale air with outside fresh air. The unit is equipped with a
special energy recovery core which transfers both sensible and
latent heat between the fresh incoming air. The cross--flow design
core allows entering and leaving air streams to transfer heat energy
without mixing. (See Fig. 2.)
The ERVBBHA is available in 2 sizes with airflow ranges of
60--148 CFM (28 -- 71 L/s), and 60-- 183 CFM (28 -- 89 L/s). The
design of this unit is horizontal. Special attention should be given
to duct application, balancing the ERV, and locating unit for easy
access and routine maintenance.
INSTALLATION CONSIDERATIONS
Inspect Equipment
Move carton to final installation location. Remove ERVBBHA
from carton taking care not to damage unit. Remove all packaging
and inspect unit for damage. Remove parts bag from inside unit.
File claim with shipping company if shipment is damaged or
incomplete. Check to make sure ERV unit matches Fig.1.
Select Location
The ERV should be located in a conditioned space andinclose
proximity to a fused power source. It should be easily accessible
for routine maintenance.
If ERV is installed independent of a forced--air system, unit should
be located near the center of the air distribution system. If ERV is
installed in conjunction with a forced--air system, unit should be
located next to (or close to) the indoor equipment.
Fig. 2 -- ERV Airflow During Air Exchange
Independent System Application
In the absence of a forced--air system and a typical duct system
layout, the ERV can be applied as an independent or stand alone
unit. To ensure comfort, this type of application involves running
both fresh --air and return--air registers (or stale--air pickup registers)
throughout the home.
Fresh--air registers are normally located in bedrooms, dining
rooms, living rooms, and basements. It is recommended that
registers be placed 6 to 12” (152 to 305 mm) from the ceiling on an
interior wall and airflow directed toward the ceiling. If registers are
floor installed, airflow should be directed toward the wall.
A07572
9
10
7
ERV
3
2
Fig. 3 -- ERVBBHA Components
6
5
4
Component Description
The following listed items are components of ERVBBHA (see Fig.
3).
1. Stale air return from building connected to return--air duct
system.
2. Fresh--air intake connected to outdoor air inlet hood.
3. Exhaust--air connected to outdoor air exhaust hood.
4. Mechanical filters trap dust contained in the air.
5. Energy recovery core is a cross--flow type. It transfers sensible and latent energy between the 2 air streams.
6. Blowers bring in fresh--air from outside and exhaust stale-air to outside.
7. Electronic control circuit ensures proper unit operation.
8. Fresh--air supply from ERV connected to return--air duct of
forced air system.
9. Terminal connector block for wiring wall and timer controls.
10. Electrical cord connects to standard 115v outlet.
UNIT INSTALLATION
!
CAUTION
UNIT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
Do not install ERV in a corrosive or contaminated
atmosphere.
Mount Unit
The ERV can be suspended from floor joists using chains and 4
springs. Attach metal hanging bracket to all 4 sides of cabinet (see
Fig. 4). The unit may be installed on a shelf if an isolation pad is
provided to dampen vibration. Unit should always be installed as
level as possible.
8
1
A07613
A92269
Fig. 4 -- Chain Spring Installation
!
WARNING
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal injury
or death.
Do not install return--air registers (or stale--air pickup registers)
in same room as gas furnace or water heater.
Return--air (or stale--air pickup registers) are normally located to
draw from kitchens, bathrooms, basements, or other rooms where
stale--air can exist.
Proper size and type of registers must be used to minimize pressure
drop. The velocity of airflow through register should not be above
400 ft per minute.
Maximum length of duct for the system should be designed
according to the highest speed of the unit. Refer to specifications
listed in unit Product Data Digest for ventilation capacities.
Forced--Air Application
Most ERV applications will be installed in conjunction with new or
existing forced--air systems. To operate properly, the fresh--air
supply and stale--air return from ERV connect directly to return--air
duct system. This is how the ERV distributes fresh air and removes
stale air from inside of building (see Fig. 5). For these installations,
furnace or fan coil blower must be interlocked and operate
continuously whenever ERV is energized.
NOTE: The fresh air from ERV is introduced into return--air duct
at a point no less than 6 ft (1.8 m) upstream of furnace or fan coil.
This connection should be direct (see Fig. 5). This is to allow
incoming fresh--air to mix before entering indoor equipment.
2
A07617
R
Fig. 5 -- Exhaust Ventilation
FRESH-AI
SUPPLY
FLEXIBLE
DUCT
STALE-AIR
RETURN
DUCTS CONNECTING TO
RETURN-AIR DUCT SYSTEM
A07610
Fig. 6 -- Flexible Duct Fit--Up
Connect Ducts to ERV
!
CAUTION
PROPERTY DAMAGE HAZARD
Failure to follow this caution may result in minor property
damage from sweating duct or loss of unit efficiency and
capacity.
ERV should be installed in a conditioned space with insulated
flex duct for supply and exhaust air to the outdoor ambient.
eliminate transmission of noise or vibration from unit to main duct
system. In addition, there are four 30” (762 mm) duct ties provided
to help fasten flexible duct to port on ERV.
Locate and Install Exterior Hoods
IMPORTANT: To prevent condensation problems, insulated
flexible ducts are required on both fresh--air inlet and exhaust--air
outlet ducts connecting between ERV and exterior wall.
Fresh--air intake and stale--air exhaust must be separated by at least
6 ft (1.8 m). Fresh--air intake must be positioned at least 10 ft (3 m)
from nearest dryer vent, furnace exhaust, driveway, gas meter, or
oil fill pipe. Fresh--air intake must be positioned as far as possible
from garbage containers and potential chemical fumes. When
possible, it is advised to locate the intake and exhaust hoods on
same side of house or building. The intake and exhaust hoods
should never be located on interior corners or in dead air pockets
(see Fig. 5). Both intake and exhaust hoods must be 18” (457 mm)
from ground and at least 12” (305 mm) above anticipated snow
level.
After selecting proper hood locations, make appropriate size hole
through exterior wall, pass flexible duct through hole and insert
hood tube into duct. Tape duct vapor barrier tightly around hood
tube and insert assembly back into wall and fasten securely.
WALL CONTROL
Location
The ERV wall control is unique to this unit. The ER V will not
operate without it. This control senses humidity not temperature. It
must be located in an area where it will continually monitor fresh
air circulating within the home. Install ERV wall control as close as
possible to main system thermostat and follow same guidelines as
installing a thermostat (locate approximately 5 ft (1.5 m) above
floor, mount on an inside partitioning wall, etc.).
Wiring
Remove top cover assembly from wall control and pass thermostat
wire through hole located on back of control before attaching to
wall. Connect Y, R, G, and B (yellow, red, green, and black)
between wall control and ERV connector following color code (see
Fig. 7 and 8). Replace top cover assembly.
NOTE: ERV wall control and circuit board operate on 12 VDC.
ERV
Insulated flexible duct is required on both fresh--air inlet and
exhaust--air outlet ducts connecting to exterior wall. When
using insulated flexible duct, the vapor barrier of the flexible ducts
must be taped very tightly to prevent condensation problems. To
reduce pressure drop, stretch the flex duct and support it in a proper
manner to avoid reduced airflow.
When connecting the ERV to a return--air duct system, insulated
flexible duct can be used. When using metal duct from fresh--air
supply to system duct work, the metal duct should be insulated (see
Fig. 6). However, when metal or rigid ducts are applied use
approximately 18” (457 mm) of flexible duct at ERV ports for
fresh--air supply and stale--air return. This can act as a silencer
when connecting ducts to return--air duct system. This should
YELLOW
RED
GREEN
BLACK
YR GB
A00112
Fig. 7 -- Typical Wall Control
3
CONTROL
W
CONNECTOR
BLACK
GREEN
RED
YELLOW
Fig. 8 -- Control Connector
ERV
Operation
The ERV wall control has 4 basic modes of operation, OFF, LOW,
HIGH, and INTERMITTENT. Be sure that all modes of operation
are fully functional. See Table 1 indicating standard control
operation.
1. With switch OFF, ERV is inoperative and the LED is out.
2. With switch on LOW, ERV continuously exchanges air
with outside. If control is satisfied, blower will run in low
speed, otherwise, blower will run on HIGH speed. The LED
is illuminated all the time.
3. INTERMITTENT--If relative humidity level inside of
building is higher than setpoint, then no air exchange will
occur and ERV shuts off. If relative humidity level inside
building is lower than setpoint, then air exchange occurs at
high speed, and shuts down ERV when humidity level
reaches setpoint. This mode is ideal for maintaining proper
humidity level when continuous mode cannot. To ensure
highest degree of humidity control in cooling season, intermittent mode should be used.
Humidity Selection
The humidity selector is a built--in control designed to properly
control the level of humidity in the house during the summer
months. This acts like a limit switch. See Table 2 to select
maximum humidity level. If the house becomes too dry in winter
months, put wall control in INTERMITTENT mode and turn
down humidity selector to provide ventilation less frequently.
Table 1 – Basic Control
MODE OPERATION
Off Off Closed to outside Off
Low
Intermittent
High
Air exchange with
outside
Air exchange with
outside
Air exchange with
outside
Table 2 – Recommended Humidity Levels
OUTSIDE
TEMPERATURE
50°F/10°C 55% 65%
32°F/0°C 45% 55%
14°F/--10°C 35% 45%
-- 4 °F/--20°C 30% 45%
-- 2 2 °F/ --30°C 25% 35%
DOUBLE--PANE
WINDOWS
DAMPER
POSITION
Open to outside Low
Open to outside Low
Open to outside High
TRIPLE--PANE
WINDOWS
A07611
FAN
SPEED
NOTE: The ERV may be controlled using the Evolution system
control. The ERV may be connected using either a NIM or a
4--Zone Damper Module. See the appropriate instructions if using
the NIM of a 4-- Zone Damper Module for connection instructions.
OneTouch Control
The OneTouch control may be used as the primary wall control for
the ERV. This control will step through the modes of operation
with consecutive presses of the button. The LED indicates which
mode is currently selected; Off, Intermittent, Low, or High. There
is no humidity sensor on the OneTouch, and it will not provide
direct humidity control.
OLOCIYRGB
Latent Control
NOTE: To ensure highest degree of humidity control in cooling
season, the INTERMITTENT mode should be used.
Blower interlock relay is not needed for use with the Evolution
system control. The Evolution system control will simultaneously
control the ERV and the indoor blower.
Push Button Timers may be used and are connected to the ERV as
shown in Figure 9. However, the Evolution system should be set to
continuous fan to ensure that the fresh air is circulated in the home.
In a Zoned System, at least one zone should be set to continuous
fan.
ELECTRONIC CONTROL
BOARD
The ventilator has four settings in heating mode and three settings
in cooling mode.
Heating:
OL
OC
J1
(OC)
BLACK Ð (J3-4)
COMMON
TERMINAL
STRIP
J3
9
8
7
6
5
4
I
3
41 7
52 8
63 9
60 MINUTE TIMER
BACK OF PUSH BUTTON SWITCH
(OPTIONAL)
THE WIRES FROM THE SWITCH
YELLOW Ð INDICATOR, (J3-3)
BLACK Ð COMMON, (J3-4)
RED Ð SWITCH, (J3-5)
(OPTIONAL)
PUSH BUTTON SWITCHES
(5 SWITCHES MAXIMUM)
(I)
YELLOW Ð (J3-3)
INDICATOR
TERMINAL STRIP
RED Ð (J3-5)
SWITCH
TERMINAL STRIP
(OL)
RED
BLACK
YELLO
A98386
Fig. 9 -- Push Button Timer Wiring Layout
OPERATING THE ERV WITH THE
EVOLUTION CONTROL
AUTO -- the ventilator selects the speed based on indoor
humidity and outdoor temperature. It may cycle on/off every
30 minutes depending on humidity and outside temperature.
LOW -- low speed all of the time.
HIGH -- high speed all of the time.
4
DEHUM -- will only turn on if humidity is 3% over setpoint.
The speed is determined by indoor humidity and outdoor
temperature.
Cooling:
AUTO -- the ventilator selects the speed based on indoor
humidity and outdoor temperature. It may cycle on/off every
30 minutes depending on humidity and outside temperature.
LOW -- low speed all of the time.
HIGH -- high speed all of the time.
If the fan speed is set to Auto and the ventilator wants to run, the
fan speed will run at High continuous speed. Otherwise, the fan
will stay at the chosen continuous fan speed.
ELECTRICAL CONNECTIONS
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect
switch.
115 VAC Wiring
The ERV operates on 115 VAC. It comes with a power cord
attached to unit and ready to plug into a fused outlet. Unit must be
grounded for proper operation.
All electrical connections must comply with National and Local
Electrical Codes, or other ordinances that might apply.
12 VDC Wiring
The ERV circuit board, wall control, and accessories operate on 12
VDC. See Wall Control section, item Wiring and Fig. 7 and 8 for
more information.
The ERV comes with an integrated interlock. The interlock can be
wired to the system blower to ensure that the blower is running
when there is a call for ventilation. See the wiring diagram for
proper wiring of the interlock circuit.
ACCESSORIES
20 Minute Timer
A push button timer can be used to override the wall control and
put the ERV into high speed for 20 minutes. Connect switches in
parallel and connect leads to ERV terminals I, OC, and OL (see
Fig. 9). Push button locations are ideal in special activity areas,
such as bathrooms or kitchens, where high-- speed exhaust
operation is needed for a short period of time.
NOTE: The 20 minute timer will not function properly unless
ERV wall control is applied and working correctly. Timing
function is internal to electronic circuit board, it is activated by a
momentary contact between OC and OL. The I connection is to
illuminate the push button. The maximum number of push button
timers that can be applied is 5.
60 Minute Adjustable Timer
A 60 minute adjustable timer can also be used to override wall
control and put ERV into high--speed operation for a select amount
of time. Connect timer in parallel with push button timers, or to
ERV terminals OC and OL (see Fig. 9).
BALANCING ER V
Balancing intake and exhaust airflow is very important for proper
system operation and optimum performance when applying an
ERV. Unit balancing prevents a positive and/or negative pressure
within the home. Balancing the ERV is done by using balancing
dampers in the fresh air intake and stale air exhaust ducts.
Airflow is determined by temporarily connecting a magnehelic
gauge to the pressure taps on ERV. (See Fig. 10.) Balancing chart is
located on unit door.
A98400
Fig. 10 -- Magnehelic Gauge
If supply--air from outside is greater than exhaust--air from the
house, an imbalance can result over pressurizing the home. If
exhaust--air is greater than supply--air, combustion appliances may
backdraft, bringing exhaust fumes into the house. A balanced
condition will ensure optimum performance, provide satisfied
customers, and avoid expensive callbacks.
Before proceeding with balancing, all windows, doors, and
fireplace flues should be tightly closed. No exhaust systems such as
range top exhausts, dryer exhaust, fume hoods, bath or roof fans
should be in operation. The forced-- air furnace (if used for
circulation) should be operating in continuous fan mode for normal
operating speed.
Balancing Procedure
Step 1 — Set the unit to high speed.
Make sure that the furnace/air handler blower is ON if the
installation is in any way connected to the ductwork of the cold air
return. If not, leave furnace/air handler blower OFF. If the outside
temperature is below 32_F(0_C), make sure the unit is not running
in defrost while balancing. (By waiting 10 minutes after plugging
the unit in, you are assured that the unit is not in a defrost cycle.)
Step 2 — Magnehelic gauge placement.
Place the magnehelic gauge on a level surface and adjust it to zero.
Step 3 — Connect tubing from gauge to EXHAUST air
flow pressure taps.
Be sure to connect the tubes to their appropriate high/low fittings.
(See Fig. 11.) If the gauge drops below zero, reverse the tubing
connections.
NOTE: It is suggested to start with the exhaust air flow reading
because the exhaust has typically more restriction than the fresh air,
especially in cases of fully ducted installations or source point
ventilation. Place the magnehelic gauge upright and level. Record
equivalent AIR FLOW of the reading according to the balancing
chart.
Step 4 — Move tubing to FRESH air flow pressure
taps.
Adjust the fresh air balancing damper until the fresh air flow is
approximately the same as the EXHAUST air flow. If fresh air
flow is less than exhaust air flow, then go back and adjust the
exhaust balancing damper to equal the fresh air flow. (See Fig. 11.)
Step 5 — Secure both dampers thumb screw in place
with tape.
Step 6 — Record air flow information.
Write the required air flow information on a label and stick it near
the unit for future reference (date, maximum speed air flows, your
name, phone number and business address).
ERV
5
NOTE: The unit is considered balanced even if there is a
difference of ±10 CFM (or ±5 l/s or 17 m
3
/h) between the two air
flows.
Balancing Dampers
Balancing dampers (sometimes called butterfly dampers) are
located in fresh--air intake and stale--air exhaust of the ERV. (See
Fig. 11.) Some field modification may be required to ensure proper
adjustment of balancing dampers while located in flexible duct.
Insulating over these dampers is strongly recommended after
balancing is complete to prevent condensation problems.
NOTE: Temporary flow collars are not needed with the new
ERVBBHA models since the air flow pressure taps are
incorporated in the access door. (See Fig. 11.)
VENTILA TION EVALUATION
!
UNIT DAMAGE HAZARD
ERV
Failure to follow this caution may result in reduced unit
efficiency, capacity or unit life.
DO NOT use ERV during construction of a house or when
sanding drywall. This type of dust may damage system.
Ventilator Sizing
Tables 3 and 4 should be used to determine the required airflow for
a home. These guidelines are taken from ANSI/ASHRAE
62.2--2007.
Table 3 – Ventilation Air Requirements, cfm
FLOOR
AREA (ft
1501---3000 45 60 75 90 105
3001---4500 60 75 90 105 120
4501---6000 75 90 105 120 135
6001---7500 90 105 120 135 150
2
)
<1500 30 45 60 75 90
>7500 105 120 135 150 165
CAUTION
BEDROOMS
0 --- 1 2 --- 3 4 --- 5 6 --- 7 >7
Fresh air flow
Exhaust Air Flow
A05264
Fig. 11 -- Balancing ERVBBHA
CONTROL BOARD OPERATION
Board Function
To ensure proper operation of ERV, configuration jumpers are
located on electronic control board and must match configuration
setup shown in Fig. 12 under Jumper Table. Jumpers are factory set
and do not require any changes unless control board is replaced. If
control board is replaced, or unusual start--up operation is
encountered, check jumpers to make sure they are located properly.
NOTE: Power disconnect for 30 seconds is required to reset the
CPU when changing jumpers.
Outdoor Ambient Below 23_ F(--5_ C)
The ERV continually monitors outside air temperature. If outside
airisatorbelow23_ F(--5_ C), ERV will cycle between air
exchange and defrost.
The ERV measure the incoming air temperature and will cycle unit
in and out of defrost, depending on outdoor ambient. The intake
damper will close and circulate indoor air through the core for 6 to
10 minutes. This time depends on jumper location. Refer to Table 5
for defrost cycle.
Table 5 – Defrost Cycle
Table 4 – Ventilation Air Requirements, L/s
FLOOR
AREA (m
139.1---279 21 28 35 42 50
279.1---418 28 35 42 50 57
418.1---557 35 42 50 57 64
557.1---697 42 50 57 64 71
2
)
0 --- 1 2 --- 3 4 --- 5 6 --- 7 >7
<139 14 21 28 35 42
>697 50 57 64 71 78
BEDROOMS
ERV DEFROST CYCLES
Outside
Tem p °F/°C
Above 23°F/
--- 5 °C
23 to 5°F/
--- 5 t o --- 1 5 °C
4 t o --- 1 7 °F/
--- 1 6 t o --- 2 7 °C
B e l o w --- 1 8 °F/
--- 2 8 °C
Standard
Defrost (as shipped)
No Defrost No Defrost
10 Minute Defrost/60
Minute Exchange
10 Minute Defrost/30
Minute Exchange
10 Minute Defrost/20
Minute Exchange
Extended Defrost
( J u m p e r J U 1 --- F
Removed)
10 Minute Defrost/30
Minute Exchange
10 Minute Defrost/20
Minute Exchange
10 Minute Defrost/15
Minute Exchange
OFF and INTERMITTENT/OFF Mode
When ERV is Off, K1 relay is open (see Fig. 12).
High--Speed Air Exchange
When high--speed air exchange occurs, K1 relay closes and K2 (12
VDC relay) is energized. This opens low--speed contacts, and
closes high--speed contacts. Then, 115 VAC is applied between
orange and gray wires on MolexR plug (pins 1 and 6) and blower
motor runs in high--speed operation. Also, 115 VAC is applied
across pins 5 and 7, this energizes interlock relay (see Fig. 12).
Low--Speed Air Exchange
When low--speed air exchange occurs, K1 relay closes and K2 (12
VDC relay) is de--energized. This keeps low--speed contacts closed
and high-- speed contacts open. Then, 115 VAC is applied between
6
red and gray wires on Molex plug (pins 1 and 4) and blower motor
runs in low--speed operation. Also, 115 VAC is applied across pins
5 and 7, energizing interlock relay (see Fig. 12).
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect
switch.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
CARE AND MAINTENANCE
Door
ERV door can be removed by unlatching brief case style latches,
then lifting door up and sliding it sideways. Door must be in place
and secured shut for proper operation.
Filter
Filters in ERV are washable and should be cleaned every 3 months.
Use a vacuum cleaner to remove heaviest portion of accumulated
dust, then wash in lukewarm water. Allow filter to completely dry
before reinstalling. A dirty air filter will cause excessive strain on
blower motor. Never operate unit without a filter.
In addition, regularly check and clean screens on exterior intake
and exhaust hoods when necessary.
!
CAUTION
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in unit component
damage.
DO NOT clean filters in a dishwasher and DO NOT dry them
with a heating appliance or permanent damage will result.
Blower Motor and Wheel
ERV blower motors are factory lubricated for life. Lubricating
bearings is not recommended. However, inspect and clean any
accumulated dirt and grease from blower motor and wheel
annually.
Cleaning the Core
ERV is equipped with a special energy recovery core which is
made out of paper and allows transfer of sensible and latent energy.
The core should always be only vacuumed every 3 months to
remove dust and dirt that could prevent transfer of energy.
NOTE: The core should only be serviced when outdoor
temperature is between 60°F and 75°F(16°C and 24°C) and it is
dry.
!
CAUTION
UNIT COMPONENT DAMAGE HAZARD
Failure to follow this caution may result in equipment
damage or improper operation.
DO NOT use water to clean core or damage will result. In
addition, before servicing or removing the core inspect the
edges to see if they appear soft (or slightly expanded). This
can be normal and due to moisture in the air. DO NOT
handle or service core until it is dry or air passages can
become damaged and/or closed.
TROUBLESHOOTING
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect switch.
!
CAUTION
CUT HAZARD
Failure to follow this caution may result in personal injury.
Sheet metal parts may have sharp edges or burrs. Use care and
wear appropriate protective clothing and gloves when
handling parts.
NOTE: Reference Table 6 Troubleshooting Chart
This can be a quick guide in resolving unit problems. It is also
recommended to review and understand Wall Control Board
Operation and Care and Maintenance sections before continuing.
There are 3 main parts to focus on when troubleshooting ERV unit:
1. Wall Control
2. Electronic control board
3. Blower motor
Wall Control
Use Table 1 to determine if wall control is operating correctly. Use
Fig. 7 and Table 5 to check control wire connections.
NOTE: The electronic control board and wall control operate on
12 VDC.
Control Board
Electronic control board must have wall control attached before
unit will function properly. Also, configuration jumpers located on
control board must match configuration setup show in Fig. 12
under Jumper Table. In addition, outside air thermistor must be
connected to control board for it to operate properly. See Table 8,
Temperature -- vs -- Ohm Chart, for valid temperature range.
Blower Motor
The ERV blower motor operates on 115 VAC, with 2--speed
operation.
The easiest way to check blower speed operation is to use the wall
control and initiate a low-- speed blower and high--speed blower
operation using intermittent mode (see Table 1).
ERV
7
NOTE: If, after using the following test, you still hear relays
clicking upon charge, carefully check wiring, blower capacitor, and
blowers.
Alternate procedure to check blower speed:
Blower Speed T
HIGH SPEED
LOW SPEED
ERV
1. Disconnect ERV from 115 VAC.
2. Unplug wall control wires at control module terminal block
inside ERV.
3. Plug ERV back to 115 VAC.
4. Attach a wire across J3-- 8 and J3-- 9 (B and G) on control
module terminal block.
5. Push in door switch, this will initiate a high--speed exchange.
1. Unplug ERV from 115 VAC.
2. Disconnect wall control wires at control module terminal
block inside ERV.
3. Plug ERV back to 115 VAC.
4. Connect a 3.0 K ohm resistor between B and G on control
module terminal block.
5. Push in door switch, this will initiate a low--speed exchange.
est
Blower Speed Selection
Three-- speed blowers are factory connected to electronic control
board on HIGH-- and LOW--speed taps of blowers. Installer can
easily change low--speed tap to medium-- speed tap so electronic
control will select between high and medium speed. Connections
can be changed at motor location (see Table 9 and 10).
To change low speed to medium speed, proceed as follows:
1. Unplug unit from 115 VAC.
2. Remove filters and core from ERV.
3. Slide blower assembly to the right until wire connections
are visible.
4. Locate red wire and blue wire coming from blower assembly.
5. Unplug red wire from quick connect.
6. Unplug protecting cap quick connection from blue wire and
put on red wire coming from blower. The cap is a safety
insulator.
7. Connect red wire of main harness to blue wire.
8. Replace wires, blower assembly, filters, and core.
Outdoor Air Thermistor
When unit is not responding to wall control, check outdoor air
thermistor.
1. Remove thermistor wire from control board.
2. Take ohm reading across thermistor.
3. Refer to Table 8 for temperature/ohm relationship.
8
Be sure to unplug and inspect the unit before proceeding with these steps. Start with problem 1, then problem 2 and so on.
Table 6 – Troubleshooting
Problem:
1. Unit does not
work.
2. The damper
actuator does not
work.
3. The wall control
will not work.
4. The 20--minute
lighted push-button switch
doesn’t work OR
its indicator light
doesn’t stay on.
5. The defrost cycle
does not work
(the fresh air
duct is frozen
OR the fresh air
distributed is
very cold.)
Possible causes: You should try this:
S Erratic operation of the electronic
circuit.
S The breaker in the electrical panel
may be tripped.
S The door switch may be defective S Using a multimeter, check for power across the switch (the door switch
S The circuit board may be
defective.
S The fan motor may be defective. S Unplug the unit and disconnect the fan motor (4 wires). Supply 120 V
S The 9 -- pin connector may have a
loose connection.
S The 9 -- pin connector may have a
loose connection.
S The damper actuator may be
defective.
S The circuit board may be
defective.
S The wire in the wall OR the wall
control may be defective.
S The wires may be in reverse
position.
S The wires may be broken. S Inspect every wire and replace any that are damaged.
S There may be a short--circuit. S With the help of a multimeter, check for continuity.
S The switch may be defective.
S The wires may be defective OR
may not be connected properly.
S Ice deposits may be hindering the
damper operation.
S The damper rod or the port damper
itself may be broken.
S The damper actuator may be
defective.
S The circuit board may be
defective.
S The thermistor may be defective. S If the defrost mode works well after having disconnected the thermistor
S Unplug the unit. Wait for 30 seconds. Plug it back in.
S Reset breaker. If it trips again, unplug the unit and call an electrician.
must be pushed in for this test). If there is no power, replace the switch.
S Jump “B” and “G” (BLACK and GREEN). If unit
switches to high speed, remove the wall control
and test it right beside the unit using another
shorter wire. If the wallcontrolworks there,change
the wire. If it does not, change the wall control.
directly to the GREY and ORANGE wires o f the fan motor. Replace the
motor if not working.
S Unplug the unit and check to make sure all the crimp connections are
sound. Check the fan motor and the damper actuator connections as well.
S Unplug the unit and check to make sure all the crimp connections are
secured. Check the damper actuator connections as well.
S Feed 120 V directly to the damper actuator. If the problem persists,
replace the damper actuator.
S Replace the circuit board if the problem is not solved by the above.
S Remove the wall control and test it right beside the unit using another
shorter wire. If the wall control works there, change the wire. If it does
not, change the wall control.
S Ensure that the color coded wires have been connected to their
appropriate places.
S Jump the OL and OC terminals. If the unit switches to high
speed, then the wires are not the problem. Replace the
push--button.
S Ensure that the color--coded wires have been connected to
their appropriate places.
S Remove the ice.
S Inspect these parts and replace if necessary.
S Plug in the unit and select “OFF”. Press the door switch and see if the
port damper closes. If it does not close, feed 120V directly to the damper
actuator. If the port damper still does not close, replace the damper
actuator.
S Unplug the unit. Unplug the defrost sensor wire (see J4 on electrical
diagram). Plug the unit back in. Select “MIN” and make sure the unit is
adjusted for low speed operation. Wait 3 minutes. The unit should switch
to high speed and the damper at the fresh air intake port should close
(defrost mode). If this does not happen, then replace the circuit board.
wire (above test), this means the thermistor is probably defective. It
should be replaced.
ERV
9
120V, 60Hz RETURN
LOGIC DIAGRAM
J1-2
J1-1
FAN MOTOR
HI
LO
MED
J1-8
DAMPER MOTOR
Defrost c ycles (m inutes)
(Defrost / ventilation)
C
F
°
°
C-27
F-17
°
°
F5
C-15
°
°
32
-5
A09191
1000FFO
11
10/30 10/ 20 10/15
1
FAN INTERLOCK
24 VAC
CLASS 2 CIRCUIT ONLY
AIR HANDLER
J1-4
J1-6
J1-9
J3-2
J3-1
J1-3
GABCDE F
mod e ls
Extended defrost all
1elcyC tsorfeD
ERV
K2
120V, 60Hz LINE
COLOR CODE
BLK BLACK
ADVERTENCIA
RELAY
WALL CONTROL
GRN
K5
RELAY
OVERRIDE
RED
Connect to G on Furnace/Fan coil
OPTIONAL
(COMMON)
YEL
BLK
GABCDE F
NOTE 1
YEL
RED
K1
RELAY
F
J1-3
switch
Door interlock
BLU BLUE
BRN BROWN
GRN GREEN
GRY GRY
ORG ORANGE
RED RED
WHT WHITE
YEL YELLOW
Critical characteristic
Caractéristique critique
AND FIELD WIRING
CLASS 2 LOW VOLTAGE
LINE VOLTAGE
PELIGRO DE CHOQUE ELÉCTRICO
Desconecte el suministro de energía
antes de reparar, de mantener o de
cablear in situ. Vuelva a colocar todos
los paneles antes de hacer lo
funcionar. No seguir estas
instrucciones puede causar la muerte o
choque eléctrico.
BLK
Connect to G on Thermostat
Connect to R on Furnace/Fan coil
(NC CONTACT)
(NO CONTACT)
6789
J4
K3
RELAY
345
BRN
HI
NEUTRAL
GRY
YEL
GRY
J3
FF I OC OL BRYG
RED
123
789
456
123
J2J1
ELBAT REPMUJ
MODE K1 K2 K3 K5
FUNCTION TABLE RELAY
Exchange Low 1 0 1 0
Intermittent (20 min per hour) 0 0 0 1
Exchange High 1 1 1 0
IN OUT O UT IN IN IN OUT ERV BBLHA 1150 10/6 0 10 /30 10/ 20
IN OUT OUT IN IN IN OUT ERVBBLHA 1200 10/60 10/30 10/20
IN OUT O UT IN IN OUT OUT
JU1-A JU1-B JU1-C JU1-D JU1-E JU1-F JU1-G M ODEL
MOTOR
CAPACITOR
BRN
FAN MOTOR
LO
MED
BLU
RED
GRN
ORG
321
NC
GRN
BLU
ORG
DAMPER MOTOR
BLU
BLU
GRN
321
GRN
120V, 60Hz
BLK
BLK
0 = Relay coil is de-energized 1 = Relay coil is energized
Circulation Low 1 0 1 1
Circulation High 1 1 1 1
(note 4)
NEMA-15P
5-15 PLUG
F
WHT
GRN
WHT
Fig. 12 -- ERV Wiring Diagram
AVERTISSEMENT
WARNI NG
RISQUE DE CHOC ÉLECTRIQUE
ELECTRICAL
Débranchez la source d'alimentation
électrique avant l'entretien, la
SHOCK HAZARD
place . Replacez tous les panneaux
avant d'utiliser. Le non-respect de ces
réparation ou le raccordement sur
instructions peut causer un décès ou
un choc électrique
CONNECTION DIAGRAM
WIRE AS SUPPLIED MUST BE
NOTES
-t
SENSOR
maintenance or eld wiring. Reinstall all
Disconnect power before servicing /
panels before operating. Failure to do so
DEFROST TEMPERATURE
can result in death or electrical shock.
1- CONTROLS AVAILABLE SEE THE INSTRUCTION MANUAL
2- IF ANY OF THE ORIGINAL
MOTOR(S) BLUE TAP.
REPLACED, USE THE SAME OR EQUIVALENT WIRE.
3- FACTORY SET WIRING FOR BLOWER SPEED IS HIGH AND
LOW SPEED. MEDIUM SPEED CAN BE SELECTED INSTEAD OF
LOW SPEED. DISCONNECT RED WIRE FROM MOTOR(S) RED
TAP AND CONNECT TO
4- USE SPECIFIED UL LISTED /CSA CERTIFIED LINE FUSE .
FOR ALL UNITS: LITTELFUSE (225 003), 2AG FAST-ACTING FUSE,
224/225 SERIES, RATING: 3 A
10
Table 7 – System Wiring Colors and Connections
WALL
CONTROL MODULE
Ter m . B l o ck
No.
J 3 --- 9 B Black J 1 --- 4 B
J 3 --- 8 G Green J 1 --- 3 G
J 3 --- 7 R Red J 1 --- 2 R
J 3 --- 6 Y Yellow J 1 --- 4 Y
Ter m . B l o ck
ID
CONTROL
WIRE
Color Te r m . N o . Te rm. ID
WALL CONTR OL
Table 9 – Factory Set Blower Connection
HIGH or LOW Speed
Control
Module
J 1 --- 6 Orange Orange High
No
Connection
J 1 --- 4 Red Red Low
Main Electrical
Harness Cable
No
Connection
Blower Wire Speed
Blue + Cap Medium
Table 8 – Temperature/Ohm Relationship
Tem p . (_F/_C) Ohms
3 0 / --- 1 34,480
32 / 0 32,680
34 / 1 30,760
36 / 2 29,220
38 / 3 27,470
40 / 4 26,020
42 / 6 24,680
44 / 7 23,320
46 / 8 22,070
48 / 9 20,910
50 / 10 19,830
52 / 11 18,820
54 / 12 17,870
56 / 13 16,920
58 / 14 16,160
60 / 16 15,260
62 / 17 14,530
64 / 18 13,790
66 / 19 13,090
68 / 20 12,480
70 / 21 11,860
72 / 22 11,270
74 / 23 10,750
76 / 24 10,250
78 / 26 9,750
80 / 27 9,300
82 / 28 8,840
84 / 29 8,432
86 / 30 8,042
88 / 31 7,668
90 / 32 7,310
92 / 33 6,993
94 / 34 6,661
96 / 36 6,368
98 / 37 6,085
100 / 38 5,811
102 / 39 5,571
104 / 40 5,313
106 / 41 5,088
108 / 42 4,869
110 / 43 4,660
112 / 44 4,450
114 / 46 4,268
116 / 47 4,019
118 / 48 3,918
120 / 49 3,750
Table 10 – Modify Blower Connection
HIGH or MEDIUM Speed
Control
Module
J 1 --- 6 Orange Orange High
J 1 --- 4 Red Blue Medium
No
Connection
Main Electrical
Harness Cable
No
Connection
Blower Wire Speed
Red + Cap Low
ERV
11
ERV
E2009 Bryant Heating & Cooling Systems 7310 W. Morris St. Indianapolis, IN 46231 Printed in U.S.A. Edition Date: 03/09
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
12
Catalog No. IIERVLHA--- 0 2
Replaces: IIERVLHA--- 01
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