RenewAire LE8XIN Series User manual

LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 1
4510 Helgesen Drive, Madison, WI 53718
[phone], [phone], Fax: [phone]
[email protected] www.renewaire.com
LE8XIN
Table of Contents
FOR THE SPECIFIER AND INSTALLER.................................2
FOR THE ELECTRICIAN.................................................7
FOR THE CONTROL CONTRACTOR..................................10
FOR THE TEST, BALANCE, & COMMISSIONING CONTRACTOR..14
SERVICE PARTS.........................................................17
MAINTENANCE.........................................................18
1. Before servicing or cleaning the unit, switch power
off at disconnect switch or service panel and lockout/
tag-out to prevent power from being switched on
accidentally. More than one disconnect switch may be
required to de-energize the equipment for servicing.
2. This installation manual shows the suggested
installation method. Additional measures may be
required by local codes and standards.
3. Installation work and electrical wiring must be done
by qualied professional(s) in accordance with all
applicable codes, standards and licensing requirements.
4. Any structural alterations necessary for installation
must comply with all applicable building, health,
and safety code requirements.
5. This unit must be grounded.
6. Danger of severe injury to bystanders and damage
to unit or property if high winds move this unit.
Secure this unit to the building!
7. Sufcient air is needed for proper combustion and
exhausting of gases through the ue (chimney) of
fuel burning equipment that might be installed in
the area affected by this equipment. If this unit
is exhausting air from a space in which chimney-
vented fuel burning equipment is located, take steps
to assure that combustion air supply is not affected.
Follow the heating equipment manufacturer’s
requirements and the combustion air supply
requirements of applicable codes and standards.
8. Use the unit only in the manner intended by the
manufacturer. If you have questions, contact the
manufacturer.
9. This unit is intended for general ventilating only. Do
not use to exhaust hazardous or explosive materials
and vapors. Do not connect this unit to range hoods,
fume hoods or collection systems for toxics.
10. When cutting or drilling into wall or ceiling, do not
damage electrical wiring and other hidden utilities.
NOTE
LE8XIN can be delivered in two modules for on-site
assembly or as a complete unit (additional charges apply).
See Separate SHIPPING & RIGGING Manual for information
on shipping considerations, and moving and lifting the
unit as separate modules or as a complete unit.
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LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 2
FOR THE SPECIFIER AND INSTALLER
PHYSICAL CONFIGURATION OPTIONS
The LE8XIN is available from the factory in four different
congurations to meet different connection requirements:
To avoid motor bearing damage and noisy and/or
unbalanced impellers, keep drywall spray, construction
dust, etc., out of unit.
Do not remove or disable the wiring interconnection
between the Overload Relays and the Contactors. Without
this interconnection the motor(s) will not be protected
against overload.
Option
Code
Normal Duct Connection
Conguration
Alternate Duct Connection
Conguration*
LE-8X*INV Room Air [RA] enters upper left
side of unit.
Exhaust Air (EA) exits lower right
side of unit.
Outside Air (OA) enters upper
right side of unit.
Fresh Air [FA] exits lower left side
of unit.
Room Air [RA] enters upper right
side of unit.
Exhaust Air (EA) exits lower left
side of unit.
Outside Air (OA) enters upper left
side of unit.
Fresh Air [FA] exits lower right
side of unit.
LE-8X*INH Room Air [RA] enters lower right
side of unit.
Exhaust Air (EA) exits upper left
side of unit.
Outside Air (OA) enters upper
right side of unit.
Fresh Air [FA] exits lower left side
of unit.
Room Air [RA] enters upper right
side of unit.
Exhaust Air (EA) exits lower left
side of unit.
Outside Air (OA) enters lower
right side of unit.
Fresh Air [FA] exits upper left side
of unit.
NOTE: Before installing unit, conrm the duct conguration was specied correctly
for your installation requirements.
* The unit is always supplied from the factory in the Normal Duct Connection
Conguration. If it is intended to use the Alternate Duct Connection Conguration,
specify FA and EA dampers and motor horsepowers for the “opposite” airstreams.
Keep this reversal in mind when making control connections.
LE8XIN CONFIGURATION CHART
NOTE
Provide service access to the unit to allow for cleaning
the core and lter.

LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 3
LE8XINH DIMENSIONS
80 5/8"
Overall
320" Service Area
23" Electrical Box
Service Width
36" Electrical Box
Service Depth
110 7/8"
Service Area
79 7/8"
79 7/8"
TOP VIEW
OA RA
EA FA
6"
38 3/8"
5 1/2" 27 3/4"
71 1/8"
Overall
27 1/8"
165 1/2" Overall
29 5/8"
64 5/8"
53 1/2"
5 1/4" (2) 7/8"
Knockouts
in Bottom
of E-Box
11 3/8" (5)
1 1/8"
Knockouts
in Bottom
of E-Box
LEFT VIEW
22" X 50" Duct
Flange
22" X 50"
Duct Flange
E-Box
Disconnect
Switch
FA Damper
Location
(Optional)
EA Damper
Location
(Optional)
12" X 12"
Electrical
Connection
Cover
41 1/2"
8 3/4"
27 3/8"
27 3/8"
RIGHT VIEW
24" X 48"
Duct Flange
24" X 48"
Duct Flange
69 3/4"
2" Typical
73 3/8"
Lifting Lugs
3 3/8"Power
& Control
Wiring Inlet
(4) Pressure
Taps
EA
FA
OA
RA
FRONT VIEW
Scale: 1" = 48"
Do not scale drawing
RenewAire LLC
LE8XINH Dimensions
LE8XINHDIMSMAR14
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
FA: Fresh Air to inside
Customer Approvals
LE8XINV DIMENSIONS
27 3/8"
41 1/2"
71 1/8"
Overall
27 1/8"
6"
5 1/2"
165 1/2" Overall
29 5/8"
64 5/8"
53 1/2"
5 1/4" (2) 7/8"
Knockouts
in Bottom
of E-Box
11 3/8"
(5)
1 1/8"
Knockouts
in Bottom
of E-Box
FA Damper
Location
(Optional)
22" x 50"
Duct Flange
24" X 48"
Duct Flange
Disconnect
Switch
LEFT VIEW
12" X 12"
Electrical
Connection
Cover
27 3/8"
41 1/2"
27 1/8"
6"
24" X 48"
Duct Flange
22" X 50"
Duct Flange
EA Damper
Location
(Optional)
E-Box
RIGHT VIEW
80 5/8"
Overall
36" Electrical Box
Service Depth
37 1/8"
23" Electrical Box
Service Width
110 7/8"
Service Area
79 7/8"
277 1/8" Service Area
TOP VIEW
EA
FA
RA
OA
2" Typical
73 3/8"
Lifting Lugs
69 3/4"
3 3/8" Power &
Control
Wiring Inlet
OA
FA
RA
EA
(4) Pressure
Taps
FRONT VIEW
Scale: 1" = 48"
Do not scale drawing
RenewAire LLC
LE8XINV Dimensions
LE8XINVDIMSMAR14
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
FA: Fresh Air to inside
Customer Approvals

LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 4
LE8XINV CORNER WEIGHTS
LE8XINH Models
MOTOR HP Basic Unit Weights (lbs.)
UNIT LF LR RR RF
3 2479 730 636 518 595
5 2493 724 693 526 550
7.5 2611 767 736 542 566
ADDER WEIGHTS (lbs.) FOR LE-8XINH OPTIONS
OPTION UNIT LF LR RR RF
Double Wall 524 131 131 131 131
(2) VFDs 15 13 1 0 1
FA Damper 29 8 21 0 0
EA Damper 29 21 8 0 0
TOTAL
SELECTED
WEIGHTS
LE8XINH CORNER WEIGHTS
69.8"
Mounting Hole Centers
152.0" Mounting Hole Centers
LF RF
RRLR
CORNER WEIGHTS AT BASE RAIL MOUNTING HOLES
3/8" Pre-drilled
Mounting Holes
BASIC UNIT WEIGHTS (lbs.)
Motors UNIT LF LR RR RF
3 HP 2479 736 637 513 593
2493 728 696 523 546
2611 774 741 536 560
5 HP
7.5 HP
Options UNIT LF LR RR RF
ADDITIONAL WEIGHTS FOR OPTIONS (lbs.)
Double Wall 524 131 131 131 131
15 13 1 0 1
29 8 21 0 0
29 21 8 0 0
VFDs
EA Damper
FA Damper
Total Selected Weights
Add the additional weights for options to the Basic Unit weights determined by
motor size to determine Unit and Corner weights for a specific unit.
1/31/2014 MF
RenewAire LLC
Do not scale drawing
LE-8X-INH_CORNER_WEIGHTS_JAN14.2.dwg
LE-8X-INH Corner Weights
Sheet 2 of 4
SPECIFICATIONS SUBJECT
TO CHANGE WITHOUT NOTICE.
LE8XINV Models
MOTOR HP Basic Unit Weights (lbs.)
UNIT LF LR RR RF
3 2495 727 524 521 723
5 2509 733 524 522 730
7.5 2627 787 530 527 783
Adder Weights for Installed Options (lbs.)
OPTION UNIT LF LR RR RF
Double Wall 524 131 131 131 131
(2) VFDs 15 13 1 0 1
FA Damper 29 0 0 8 21
EA Damper 29 21 8 0 0
TOTAL
SELECTED
WEIGHTS
69.8"
Mounting Hole Centers
152.0" Mounting Hole Centers
LF RF
RRLR
CORNER WEIGHTS AT BASE RAIL MOUNTING HOLES
BASIC UNIT WEIGHTS (lbs.)
Motors UNIT LF LR RR RF
3 HP 2495 731 520 517 727
2509 738 520 517 734
2627 793 524 521 789
5 HP
7.5 HP
Options UNIT LF LR RR RF
ADDITIONAL WEIGHTS FOR OPTIONS (lbs.)
Double Wall 524 131 131 131 131
15 13 1 0 1
29 0 0 8 21
29 21 8 0 0
VFDs
EA Damper
FA Damper
Total Selected Weights
Add the additional weights for options to the Basic Unit weights determined by
motor size to determine Unit and Corner weights for a specific unit.
3/8" Pre-drilled
Mounting Holes
1/31/42014 MF
RenewAire LLC
Do not scale drawing
LE-8X-INV_CORNER_WEIGHTS_JAN14.2.dwg
LE-8X-INV Corner Weights
Sheet 2 of 4
SPECIFICATIONS SUBJECT
TO CHANGE WITHOUT NOTICE.
Danger of carbon monoxide poisoning!
The outside air intake should be at least 10’ away
from exhausts such as dryer vents, chimneys, furnace
and water heater exhausts, or other sources of
contamination or carbon monoxide.
Do not locate outside air intake where vehicles may be
serviced or left idling.
Never locate the outside air inlet inside a structure.
Do not install the unit inside a garage or parking structure.

LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 5
VIBRATION ISOLATION
Possible damage to equipment if the motor/blower
assembly vibration isolators are used with whole-unit
spring isolation, such as isolation curbs. If an isolation
curb is to be used, the LE- unit must be special-ordered
with no internal vibration isolators.
LE-Series units are standardly supplied with vibration isolators for
the motor/blower assemblies. Both neoprene and spring vibration
isolators are offered. Spring isolators are externally adjustable
with elastomeric snubbers. The standard isolators are not seismic-
rated. See table X for additional technical information.
Blower discharges are connected to the Outlets with exible duct
to minimize vibration bypass around the isolators.
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VIBRATION ISOLATOR SPECIFICATIONS, DESIGN LOADS AND DISTURBING FREQUENCIES
Isolator Type NEOPRENE SPRING
Isolator Location Motor End
(Black)
Blower End
(Blue)
Motor End
(Red)
Blower End
(Tan)
Quantity 2 2 2 2
Rated Max Load (lbs) 170 135 150 100
Rated Max Deection (in.) 0.25 0.25 1.00 1.00
Spring Rate (LB/IN) 680 540 150 100
Design Load (LB each)* 95-105 75-85 95-105 75-85
Final Height Not adjustable Adjust to 3-3/8”
Disturbing Frequencies: 60 Hz (power line frequency) 29.0-29.3 Hz (motor speed), 10-20 Hz
(blower speed).
*Exact Design Load varies depending on motor HP
DUCT CONNECTIONS
Where the ducts connecting to the outside are inside the
building, they must be insulated, with a sealed vapor
barrier on both inside and outside of insulation.
OA and RA duct connections to the sides of the unit are equipped
with double-anged duct connections. These allow for connection
of ducts insulated on the inside or the outside, or for installation
of lined duct.
EA and FA duct connections to the sides are equipped with single
anged duct connections.
Connect ducts to these anges with standard S-Slips.
SOUND ATTENUATION
Outside the building:
The exhaust hood is the primary source of noise outside the
building. When practical, orient the exhaust air hood to point
away from houses or public areas.
Duct Stiffness:
Make sure the ductwork at the unit outlets is stiff enough to
resist the exure and resulting booming associated with system
start-up and shut-off, as well as the turbulent ow conditions at
the blower outlets.
In general, provide smooth transitions from the ERV’s outlets to
the duct. The ducts connecting to the outlets should be straight
for a sufcient distance, with gradual transitions to the nal duct
size. These guidelines are consistent with SMACNA recommended
duct layout practices for efcient and quiet air movement.
Follow SMACNA guidelines.
Radiated Noise:
The LE8XIN is insulated with high-density berglass. This provides
signicant attenuation of radiated sound from the unit itself.
The outlet ducts can be signicant sources of radiated sound
as well. The FA duct should be insulated for sound control. This
insulation should start at the unit. At a minimum the rst ten
feet of duct should be insulated. All parts of the FA and RA ducts
located in a mechanical space with noise-generating equipment
also should be insulated for sound control, both to minimize
sound radiation out of the FA duct, and also to control sound
radiation into both ducts.
Danger of Electrical Shock when servicing an installed unit.
ALWAYS DISCONNECT POWER SOURCE BEFORE SERVICING!
More than one disconnect switch may be required.
Proper Wiring Size Selection and Wiring Installation are
the Responsibility of the Electrical Contractor.

LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 6
FOR THE ELECTRICIAN
Units shipped in two modules ONLY:
INTERNAL WIRING CONNECTIONS ARE REQUIRED AFTER MODULES
ARE FASTENED TOGETHER, AND BEFORE CONNECTION OF UNIT
SUPPLY POWER. Refer to following:
For INH and RT models, the back module comes pre-wired with the
exhaust air blower wires being routed from the motor to the open
end of the module. The ends of the wires are connected to a plug.
If the back module is equipped with isolation damper(s), they
are also pre-wired with the damper wires being routed from the
damper actuators to the open end of the module. The ends of the
wires are connected to plugs.
Once the modules are set in place and fastened together, open
the electrical connection cover on the electrical box side of the
front module by removing screws in the access panel. The access
panel is located in the upper rear corner of the front module.
Danger of Electrical Shock unless all internal wiring connections
must be made before power is connected to the Unit.
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Inside the access panel there is a high and low voltage
compartment. Low voltage the lower compartment and high
voltage the upper compartment.
The compartments are open to the left to access the high and
low voltage plugs that are coming from the exhaust air blower
and isolation dampers (if equipped).
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Reach through the back left side of the compartments and into
the rear module. Guide the low and high voltage wires in to the
front module compartments.
In the front of the compartments there are high and low voltage
receptacles.
Plug the high voltage plug on the end of the wires from the rear
module into the din rail mounted, high voltage receptacle.
If equipped with either or both OA and EA isolation dampers,
plug the low voltage plug(s) that are on the end of the wires
from the rear module in to the corresponding low voltage
receptacle(s). NOTE: Insure the proper isolation damper plugs
from the rear module are matched up to the proper isolation
damper receptacles in the front module (See labels of OA and EA
on both the plugs and receptacles)
In both compartments secure excess wire with the wire ties
located in each compartment.
Replace access cover by sliding the top of the cover underneath
of the roof pan and replace screws.
Caulk the sides and bottom of access panel. (Caulk supplied)
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LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
138233_000 LE8XINMan_Feb14.indd Revised 02/2014 www.renewaire.com Page 7
Danger of Electrical Shock when servicing an installed unit.
ALWAYS DISCONNECT POWER SOURCE BEFORE SERVICING!
More than one disconnect switch may be required.
Proper Wiring Size Selection and Wiring Installation are
the Responsibility of the Electrical Contractor.
The required Electrical Power Supply Voltage, Phase, Motor
FLA, MCA and MOPD are marked on the Unit Label (located near
electrical box). The complete Unit Model Number and Serial
number are found in the lower left corner of the Unit Label.
MINIMUM SUPPLY WIRE RATINGS & REQUIREMENTS
Use Minimum Circuit Ampacity (MCA) rating on the Unit Nameplate
as the basis for wiring sizing.
Wire insulation must have minimum 75°C rating.
Wire insulation must have minimum 600V rating.
Follow all applicable safety codes, such as NEC or CSA
C22.1 Canadian Electric Code part 1!
Electrical Options are identied on the Unit Label (located near
electrical box). Find the complete Unit Model Number in the
lower left corner of the Unit Label.
POWER SUPPLY CONNECTION LOCATION
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DISCONNECT SWITCH SPECIFICATIONS
LE-series Units are provided with a Disconnect Switch integrated
with the Unit Electrical Box access cover. The Unit E-Box Cover
cannot be opened without turning this Disconnect Switch to the
“OFF” position.
After the E-Box Cover is opened and removed, the Disconnect
Switch can be switched back to the “ON” position for trouble-
shooting purposes. The Disconnect Switch must be returned to
the “OFF” position in order to re-install the E-Box Cover.
NOTE: Local codes may require installation of an additional
Disconnect Switch.
Even when Disconnect Switch is in the OFF position,
Voltage will still be available at the L1, L2 and L#
terminals unless power has been disconnected at an
upstream location.
Re-install the nger-safe guard after connecting the
power supply conductors to the L1, L2 & L3 on the
Disconnect Switch.
POWER SUPPLY: 208-230VAC
3Ø
460VAC
3Ø
575VAC
3Ø
208-230VAC
1Ø
MAX RATED VOLTAGE: 600VAC
AMPS: 125 63 63 63
HORSE POWER: 20 25 30 7-1/2
MAXIMUM WIRE SIZE: 1/0 AWG 6 AWG 6 AWG 6 AWG
LOAD-SIDE TERMINAL
TIGHTENING TORQUE
15 in.•lbs

LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
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Once the main power supply is connected to the Unit, the
electrical contractor may want to conrm that the unit is
operational.
NOTE: it is assumed below that no external control or system is
connected to the Unit at this point.
1. Start with the branch circuit supply to the Unit locked OUT
at the fuse box, and Disconnect Switch in the OFF position,
with E-Box Cover removed.
2. Conrm correct voltage and phase is corrected to line side of
disconnect in Unit E-Box.
3. Conrm that internal wiring from the Unit E-Box to the
Exhaust Air Blower is complete. . If not, see page _ for
connection instructions.
4. IF optional Exhaust Air or Fresh Air Outside Air Dampers are
provided, conrm that internal wiring from the Unit E-Box to
the Damper Actuators has been connected. If not, see page
_ for connection instructions.
5. Conrm Overload Relays on the Motor Starters are set
correctly.
6. At the low-voltage terminals, install a jumper between
terminals 2 & 3. Install jumpers between terminals 1 and
4, and between 4 and 5. This will call for unit operation as
soon as power is supplied to the unit.
7. OPTIONAL FOR MAXIMUM SAFETY – re-install E-Box Cover. If
the unit has any VFDs, leave the keypads access cover off.
8. Turn on the branch circuit supply power at the fuse box.
UNIT WITH ONE OR TWO VFDs – SKIP TO STEP 11
10. (MOTOR STARTER UNITS) Turn the Disconnect Switch to the
ON position.
a. UNITS WITHOUT DAMPERS – both motors should start
immediately.
b. UNITS with Dampers – dampers should start opening.
After about 30 seconds the Damper Actuator end switches
will engage and call on the appropriate Motor Starter to
engage, and the controlled motor should start.
c. SKIP TO STEP 12.
11. (VFD UNITS) Turn the Disconnect Switch to the ON position.
a. UNITS WITHOUT DAMPERS:
i. If there is only one VFD, the Motor that is not
controlled by a VFD should start immediately.
ii. To start the motor(s) controlled by VFD(s):
1. Wait for the keypad display(s) to appear.
2. For each keypad, press the HAND button
(see illustration). Motor should start running at a low speed.
3. Use the UP/DOWN Buttons to set motor
speed as desired. Conrm the motors amps are no greater
than the motor FLA as listed on the unit nameplate.
4. Continue to STEP 12
b. UNITS with Dampers – the dampers should start opening.
After about 30 seconds the Damper Actuator end switches
will engage. SKIP BACK TO STEP 11.a.i, above.
12. Turn Disconnect Switch to the OFF position. Disconnect
jumper from terminal 1, but otherwise leave the jumpers in
place for the convenience of following contractors.
13. Leave unit with E-Box Cover installed.
14. Lock-out and tag-out the Branch Circuit Supply power to the
Unit.
BASIC UNIT OPERATION CHECK
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LE8XIN Due to continuing product development, specications are subject to change without notice. © 2014 RenewAire LLC
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FOR THE CONTROL CONTRACTOR
ON-BOARD 24VAC CLASS 2 POWER SUPPLY
This ERV is provided with a Class II 24VAC power supply system that
operates the unit’s contactor(s) for EV450 and HE1X. The ERV’s
24VAC Power Supply can also be used to power the externally
installed controls system: up to 8VA of power is available.
The unit’s power supply system includes isolation relay(s) so you
can use external controls whose contact ratings are as low as
50mA (1.2VA). Also, it is possible to operate the isolation relays
with 24VAC power from an external source (with proper wiring
connections).
A built-in circuit-breaker prevents damage to the transformer
and other low-voltage components in the event of a short-circuit
or overload. In extreme cases, the transformer itself is designed
to fail safely.
Danger of Electrical Shock when servicing an installed unit.
ALWAYS DISCONNECT POWER SOURCE BEFORE SERVICING!
More than one disconnect switch may be required.
Proper Wiring Size Selection and Wiring Installation are
the Responsibility of the Electrical Contractor.
1. Connect only to components intended for use with
24VAC power.
2. Do not interconnect the unit’s Class 2 power supply
with an external Class 2 power supply.
3. Do not undersize the low-voltage wires connected to
this device. Observe the wire length and gauge limits
indicated in this manual.
4. Do not overload this unit’s 24VAC power supply
system. Conrm that the power requirements of
devices you connect to this power supply system do
not exceed 8VA in total.
5. If an external source of 24VAC power is used to
control the unit, consult the wiring schematics and
connect the external power only to the specied
terminals in order to avoid damaging the unit or
external controls. Connect only CLASS II power to the
control terminals of this unit.
6. Unit is not equipped to receive analog signals (such
as 1-10vdc or 4-20mA).
7. Unit is not equipped to communicate directly with
Building Management Systems (such as BACNET,
LONWORKS, etc.). However, the unit can be controlled
by powered or nonpowered contacts operated by any
kind of control system.
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TransformerSpecications
• Nominal Output Voltage under load: 24VAC
• Typical Output Voltage at no load: 29-31V
• Minimum contact rating for connected control device: (50mA (1.2VA)
• Circuit Breaker Trip Point: 3A
Limits of Class 2 Power Output
If limits on wire gauge and length are observed, you may connect
control devices that draw up to 8VA to the blue and red wires.
More than one device can be connected as long as total steady
state load does not exceed 8VA.
This ERV is provided with a Class II 24VAC power supply system that
operates the unit’s contactor(s) for EV450 and HE1X. The ERV’s
24VAC Power Supply can also be used to power the externally
installed controls system: up to 8VA of power is available.
OBSERVE THESE LIMITS TO WIRE LENGTH AND GUAGE,
to ensure reliable operation of the control system.
Wire Gauge #22 #20 #18 #16 #14 #12
Circuit Length (ft) 100’ 150’ 250’ 400’ 700’ 1000’
“Circuit Length” is the distance of the wire route from the ERV to the Control Device.
How to Reset the 24VAC Circuit Breaker
If the transformer is subjected to an excessive load or a short
circuit, the circuit breaker will trip to prevent the failure of the
transformer. When it trips the circuit breaker’s button pops up.
Shut off the primary-side power to the unit, and remove the
excessive load or the short. The circuit breaker can be reset
about fteen seconds after it trips by pressing in the button.
UNITS WITH 230VAC POWER SUPPLY:
Unit is shipped with transformer set for 208VAC power
supply. For 230VAC, move the black primary-side
lead from the transformer’s “208V” terminal to the
transformer’s “230V” terminal.
Do not move the black primary-side lead that is connected
to the transformer’s “COM” terminal.

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MOTOR PROTECTION: UNITS EQUIPPED WITH MOTOR STARTERS
When the unit is not specied with optional Variable Frequency
Drives (VFDs), it is supplied with IEC-style motor starters to
operate the motors and to protect them against overload.
IEC-style motor starters use Overload Relays to detect excessive
current and interrupt the control circuit that engages the motor’s
contactors.
The Overload Relays are sized to Full Load Amp (FLA) rating of
the protected motor. The Overload Relays can be adjusted to trip
(interrupt the control circuit) at a specic setting within a range.
Overload Relays should initially be set at the FLA rating of the
motor (see Unit Rating Label). If necessary to prevent nuisance
tripping at start-up, the Relays can be adjusted to trip no higher
than 115% of the motor’s FLA rating.
For safest operation, the overload relays should also be used in
manual reset mode with trip test capability.
NOTE: As factory-wired, if one blower motor is shut down due to
overload by its Motor Starter, the other motor will also be shut
down.
NOTE: Terminals 96 & 97 of the Overload Relays and terminals 14
& 13 of the Contactors are normally-open dry contacts that may
be used to signal that the contactors are closed and/or that the
Overload Relays have tripped.
FOR THE CONTROL CONTRACTOR
inf[email protected]m
MOTOR PROTECTION: UNITS EQUIPPED WITH VARIABLE
FREQUENCY DRIVES (VFDS)
SEE SEPARATE SUPPLEMENTS
In units provided with VFD, the motor overload protection
function is provided by the VFD.
NOTE: Some units are equipped with a single VFD, which controls
only one of the motors.
SIMPLIFIED UNIT SCHEMATICS
TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC 24VAC 96 95
C
A2
A1
24VAC 96 95
C
A2
A1
FUSES (opt.)
UNIT DISCONNECT
1 4
35
C
1 4
35
C
1L1 2T1
3L2 4T2
5L3 6T3
1L1 2T1
3L2 4T2
5L3 6T3
MOTOR
FA
MOTOR
EA
T1
L2 T2
L3 T3
L1
MOTOR STARTER (EA)
MOTOR STARTER (FA)
RELAY (FA) RELAY (EA)
"UNIT CONTROL USING CLASS II 24VACPOWER PROVIDED BY THIS UNIT"
24VAC POWER AVAILABLE AT TERMINALS 1 & 2
INSTALL PROVIDED JUMPER BETWEEN TERMINALS 2 & 3
FACTORY SETTINGS:
Overload Relay Trip Settings = Motor Nameplate FLA
Overload Relay Mode Settings:"Manual" position
KEY:
"FA" = Fresh Outside Air Blower
"EA" = Exhaust Air Blower
POWER SUPPLY
3-PHASE 60 Hz
SEE UNIT RATING
LABEL FOR PHASE,
VOLTAGE, MCA AND
MOPD
GND
Call for FA Blower Operation.
Call for EA Blower Operation.
Call for FA Blower Operation.
Call for EA Blower Operation.
24VAC OUT
Class II
24VAC
JUMPER
"UNIT CONTROL USING CLASS II 24VAC POWER FROM ANOTHER POWER SOURCE"
24VAC POWER AVAILABLE AT TERMINALS 1 & 2
DO NOT INSTALL JUMPER BETWEEN TERMINALS 2 & 3
1
2
3
4
5
1
2
3
4
5
DO NOT interconnect this unit's
Class 2 Power Supply with an
External Power Supply.
See Examples below.
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC

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FOR THE CONTROL CONTRACTOR
EXTERNAL CONTROL CONNECTIONS
Make sure the control provides no voltage or current at
its output terminals.
inf[email protected]m
NOTE: The simplied schematics below show only the relevant
portions of the low-voltage control circuit in the ERV unit and
representational external control approaches. See the complete
unit schematics elsewhere in this manual.
A. Single 2-wire Control, unpowered: Use schematic below if the
control requires no power from the unit to operate and acts like
a simple on/off switch. The control must not supply any power to
the ERV unit. Install jumper (provided) between terminals 2 & 3.
Connect the control’s contacts to terminals 1 & 4 to operate the
ERV’s Isolation Relay for OA/ FA Blower. Install jumper (provided)
between terminals 4 & 5 to operate the ERV’s Isolation Relay for
the RA/EA Blower.
B. Single 2-wire Control on separate Power Supply, no power
present at Control Output: Wire as shown for the Single 2-wire
control (A. above).
C. Control Sending 24VAC “On” Signal (from an external power
source) to ERV: Make sure jumper is NOT installed between
Terminals 2 & 3. Now you safely can apply 24VAC to the Terminals
3 & 4 to operate the ERV’s Isolation Relay for OA/FA Blower.
Install jumper (provided) between terminals 4 & 5 to operate the
ERV’s Isolation Relay for the RA/EA Blower.
Supply only 24VAC (not VDC) from a Class II Power Source.
D. Control operating on Unit’s 24VAC Power Supply: 24VAC power
is available at the Terminals 1 & 2. CAUTION: external control
system should not draw more than 8VA. Install jumper (provided)
between terminals 2 & 3. Connect the switched output of the
Control to Terminal 4 to operate the ERV’s Isolation Relay for OA/
FA Blower. Install jumper (provided) between terminals 4 & 5 to
operate the ERV’s Isolation Relay for the RA/EA Blower.
E. Control System with 2 Non-powered Relay Contacts: Use this
schematic if the external control system provides no voltage or
current at its output contacts. Install jumper (provided) between
terminals 2 & 3. Connect one side of each of the output contacts
to Terminal 1. Connect the other side of the output contact to
control the FA Blower to Terminal 4, and the output contacts to
control the EA Blower to Terminal 5.
F. Control System Sending two 24VAC “On” Signals from an
external power source: Make sure the jumper is NOT installed
between Terminals 2 & 3. Now you safely can apply one of the
24VAC signals to Terminals 3 & 4 to operate the ERV’s isolation
relay for the Fresh Air Blower. Apply the second 24VAC signal
to Terminals 3 & 5 to operate the ERV’s isolation relay for the
Exhaust Blower (make sure the polarity of each wire connected
to Terminal 3 is the same).
Supply only 24VAC (not VDC) from a Class II Power Source.

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FOR THE CONTROL CONTRACTOR
BASIC OPERATING SEQUENCES
Operating sequences are different, depending on whether the
unit is:
Controlled for simultaneous blower operation, as in A-D, above,
or controlled for independent blower operation, as in E-F, above;
Is factory-provided with OA Damper, EA Damper, or both;
Is factory-provided with VFD control of one or both motors.
Simultaneous or Independent Blower Operation:
When set up for Simultaneous Blower Operation, both blowers
should respond to a call for unit operation at the same time,
unless only one of the blowers is controlled by a VFD or unless
only one of the blowers is in an airstream with a Damper.
When set up for Independent Blower Operation, each blower will
follow an independent operating sequence.
It is beyond the scope of this document to detail setup of VFDs and
external control systems. Please see separate VFD MANUAL ABB.
Dampers
When one or both of the airstreams are factory-provided with Dampers,
the control sequence for that airstream’s blower is as follows:
1. External control calls for operation. Damper immediately
starts to open.
2. After about 30 seconds, damper is open fully and he Damper
Actuator End Switch closes.
3. The Damper Actuator End Switch completes a low-voltage
circuit that turns on the appropriate Blower, either through
the blower’s Motor Starter, or through the blower’s VFD.
4. If that Blower is controlled by a Motor Starter, it starts immediately.
Variable Frequency Drives (VFDs)
When one or both of the blowers are factory-provided with VFDs,
the response of the Blower Motor depends on the VFD’s settings
and connected control signal.
Typically, the VFD will be connected to an control device which
provides a variable, analog signal (0-10VDC or 4-20mA) as an
input to the VFD. The VFD must be set to respond to this input
with appropriate Motor operating speeds.
Alternately, the VFD might be controlled by a Time Clock, which denes
different operating periods (e.g. “occupied” and “unoccupied”).
Each period calls on one of up to three different VFD Presets to
provide different Motor speeds in different operating periods.
It is beyond the scope of this document to detail setup of VFDs and
external control systems. Please see separate VFD MANUAL ABB.

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TEST AND BALANCE
LE-8X-IN AIRFLOW PERFORMANCE*
Motor
HP
Blower
RPM
Turns
Open
External Static Pressure (in.w.g.)
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP CFM BHP
3.0 HP
632 6 5250 1.5 4120 1.3 2840 1.0
673 5 5800 1.8 4680 1.6 3400 1.3
714 4 6350 2.2 5290 1.9 4050 1.6 2500 1.2
755 3 6910 2.5 5910 2.3 4750 1.9 3300 1.5
796 2 7460 3.0 6530 2.7 5450 2.4 4140 2.0 2300 1.4
837 1 8000 3.4 7130 3.2 6140 2.8 4970 2.4 3430 1.9
5.0 HP
773 6 7150 2.7 6180 2.4 5060 2.1 3670 1.7 1630 1.1
815 5 7710 3.2 6810 2.9 5780 2.6 4530 2.2 2830 1.6
857 4 8250 3.7 7420 3.4 6470 3.1 5360 2.7 3930 2.2
898 3 8780 4.3 7990 4.0 7120 3.6 6120 3.2 4890 2.8 3180 2.1
940 2 8570 4.6 7760 4.3 6850 3.9 5780 3.4 4420 2.8 2120 1.8
982 1 8800 5.0 8390 5.0 7550 4.6 6590 4.1 5440 3.6 3890 2.8
7.5 HP
1000 6 8660 5.3 7850 4.9 6930 4.4 5840 3.9 4450 3.2
1041 5 8510 5.7 7660 5.2 6690 4.7 5520 4.1 3960 3.2
1082 4 8370 6.1 7480 5.6 6460 5.0 5210 4.2 3430 3.2
1122 3 8800 7.1 8240 6.5 7310 5.9 6220 5.2 4870 4.3
1163 2 8800 7.6 8140 7.0 7160 6.3 6020 5.5
1204 1 8070 7.5 7040 6.7
* Performance Ratings assume standard-equipment 2” MERV-8 lters in clean condition.
TABLE: CLEAN-FILTER PRESSURE DROP (in.w.g.)
Airow (CFM) 2000 2500 3000 3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500
2" MERV 8 0.03 0.04 0.05 0.06 0.07 0.08 0.09 0.10 0.11 0.13 0.14 0.15 0.16 0.17
2" MERV 13 0.04 0.06 0.07 0.09 0.10 0.11 0.13 0.15 0.16 0.18 0.19 0.21 0.23 0.24
4" MERV 8 0.01 0.02 0.02 0.03 0.03 0.04 0.05 0.06 0.07 0.08 0.08 0.09 0.10 0.11
4" MERV 13 0.02 0.02 0.03 0.04 0.05 0.06 0.07 0.09 0.10 0.11 0.12 0.14 0.15 0.17
NOTE: Pressure drop of clean 2” MERV-8 Filters is included in the Unit Performance Ratings Table.
inf[email protected]m
FILTERS
(16) 20” x 25” x 2” or 4” (nominal) pleated lters
Actual size: 19.5” x 24.5” x 1.75” or 3.75”
Unit shipped with MERV-8 Filters.
Optional MERV-13 Filters are available.
Minimum recommended effectiveness: MERV-6
Filter Rack can be adjusted to accept 4” lters by looseing nuts
and bolts and sliding lter anges outward to the ends of the
slots. Re-tighten bolt and nuts.
Operation in this zone outside of core airow limits.
Operation in this zone will likely exceed FLA limits.

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MEASURING AIRFLOW
Equipment Required
A magnehelic gauge or other device capable of measuring 0 to
1.5 in. water of differential pressure.
2 pieces of natural rubber latex tubing, 1/8” ID, 1/16” Wall works
the best. NOTE: Be sure to remove cap from pressure port before
inserting tubing. Insure tubing is well seated in pressure ports.
NOTE: The tubing should extend in the pressure port approx. 1 inch.
LE-8X-IN Differential Pressure Measured Across Core
0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
FA Airow (CFM) 2160 3110 4030 4930 5800 6660 7510 8350 9170
RA Airow (CFM) 2160 3110 4030 4930 5800 6660 7510 8350 9170
TABLE of SHEAVE ADJUSTMENT
Motor
HP Blower Speeds Available by Sheave Adjustment Motor Sheave
Blower
Sheave
3.0 HP 837 816 796 775 755 734 714 693 673 653 633 1VP44 BC90
5.0 HP 982 961 940 919 898 877 857 835 815 793 773 2VP50 D4880
7.5 HP 1204 1183 1163 1142 1122 1101 1082 1061 1041 1020 1000 2VP62 D4900
Variable Sheaves can be adjusted by half-turns.
Use only BX-type cogged drive belts
inf[email protected]m
Procedure
The individual differential static pressures (DSP) can be measured
using the installed pressure ports located in the front of the
units core access doors. NOTE: These ports have been carefully
located on the unit as to give you the most accurate airow
measurement. NOTE: Do not relocate pressure ports.
To read SCFM of Fresh Air (FA) install the “high” pressure side (+)
of your measuring device to the Outside Air (OA) port and the
“low” pressure side (-) to the Fresh Air (FA) port.
To read SCFM of Room Air (RA) install the “high” pressure side (+)
of your measuring device to the Room Air (RA) port and the “low”
pressure side (-) to the Exhaust Air (EA) port.
Use the reading displayed on your measurement device to cross
reference the CFM output using the conversion chart.
NOTE: Be sure to replace cap into pressure port when air ow
measuring is completed.
The variable sheaves provided on the blower motors can be adjusted to drive the blowers at one of 11 speeds, as shown in the table below.
SHEAVE ADJUSTMENT AND BELT TENSIONING
NOTE: the Unit is shipped with Sheaves adjusted to less than maximum speed, so that unit will not over-amp if it is operated while
not connected to ductwork.
To Adjust Variable Sheaves
First, relieve tension on belt and remove it:
Loosen nuts on top of motor mount plate at the jacking screws
(see illustration).
Use the nuts below the motor mount plate to lift the motor up
so that the belt can be removed. Alternately, carefully lift the
motor mount plate with a lever.
inf[email protected]m

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SHEAVE ADJUSTMENT AND BELT TENSIONING
To Adjust Variable Sheaves
Second, loosen the visible allen screw(s) on the variable sheaves
until the key can be removed.
(Two-belt sheaves are used with 5 and 7.5HP motors, and two
allen screws need to be loosened.)
Spin the sheave in (to increase blower speed) or out (to decrease speed).
Sheaves can be adjusted by half-turns only.
With double sheaves, be sure to set both sheaves in the same position.
After adjusting sheave, re-install the key, and tighten down the
allen screw to a torque setting of 125 – 150 in.•lbs.
NOTE: with single-belt sheaves, it may be necessary to change
the position of the sheave on the blower shaft to ensure the
centerlines of the sheaves are aligned. This is not required with
the double-belt sheaves.
Third, re-install belt(s) and adjust motor mount plate to properly
align the sheaves and to tension the belt(s):
See belt tension table below.
In addition to achieving the proper belt tension, it is important
that the motor shaft be parallel to the blower shaft. It may be
necessary to pull DOWN on the jacking screw nearest the blower,
and push UP on the other jacking screw.
Once the belt is properly tensioned and aligned, securely clamp
the nuts on the jacking screws above and below the motor mount
plate (see illustration).
Properly tensioned belt will deect 1/8” when pressed at the
center point with the following force:
ALL HP BLOWERS - 11 pounds (initial tensioning in the factory)
It is recommended to re-tension belt after 24-48 hours of operation.
ALL HP BLOWERS - 7-9 pounds will deect 0.125”
inf[email protected]m
inf[email protected]m
Improperly aligned sheaves can cause early belt, sheave
or bearing failure.
NOTE: Possible to replace Variable Sheaves with xed sheaves.
With two-belt Variable Sheaves, at some settings the distance
between the belts at the Variable Sheave is different than it is
at the Fixed Sheave. This results in slight mis-alignment of the
belts; this should be evenly split between the two belts. The
cogged BX-type belts provided can handle this mis-alignment
up 2°, and the drive system is designed to allow for alignment
within these limits. Substitution of xed sheaves of appropriate
diameter and belt spacing can allow this minor mis-alignment to
be eliminated, which may extend belt life.
NOTE – SHEAVE SETTINGS FOR UNITS WITH VFDs
The recommended nal sheave setting for units with VFDs is zero
turns open, i.e., the maximum speed setting. Control blower speed by
adjusting the VFDs output frequency. However, if at the VFDs maximum
operating frequency, which generally should be limited to 60 Hz, the
motors overload, adjust the variable sheaves to prevent this.
Failure to follow start-up procedures may cause early
equipment failure!
START-UP AND CHECK-OUT
PROCEDURES
Before placing unit in service:
Check belt tension (see Blower Maintenance Information)
Inspect blower (see Blower Maintenance Information)
As part of rst start-up:
Install clean lters if the unit has been operated during the
construction phase.
Check running amps of each motor. Adjust if needed to maintain
current below the motor FLA.
Units with Motor Starters: Conrm the motor starter overload
relays are properly set.
Units with VFDs: Conrm the maximum power output parameters
are properly set. See supplemental VFD Manual.
Conrm the Unit operating sequence in response to control inputs is
as specied by the project engineer or commissioning documents.

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SERVICE PARTS
The service and replacement parts shown are available from
RenewAire from your distributor. When ordering parts, be sure
to provide the SERIAL NUMBER and CONFIGURATION CODE of the
unit; these are found on the Unit’s Electrical Rating Label.
EXAMPLE SERIAL NUMBER: A141234
Character 1: Letter ranging from A to L, representing month of
manufacture
Characters 2-3: Two digits representing year of manufacture
Characters 4-7: Four digits making the serial number unique to one unit.
EXAMPLE CONFIGURATION CODE: LE-8XJRTVNS35XX---ANT-A-L
For complete explanation of conguration code, see page 3.
When blower, motor, VFD or damper parts are needed, be sure to
indicate for which airstream (Fresh Air or Exhaust Air) the parts
are needed.
Some replacement parts are covered by a multi-year warranty.
See separate warranty document.

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MAINTENANCE
Danger of injury from un-guarded drive belts in unit.
Disconnect power to unit before opening door.
Danger of injury if unit starts unexpectedly. Switch
power off at service disconnect. Lock-out/tag-out the
disconnect.
SUMMARY MAINTENANCE REQUIREMENTS
• Change Filters
• Inspect Blower
• Tension Blower Belt
• General Cleaning and Inspection
• Bearing Lubrication
• Clean Energy Exchange Cores
CHANGING THE FILTERS
• Inspect and/or replace lters every two or three months
when the unit is in regular use, or as needed.
• Turn off unit completely! Lock-out and tag-out the unit
disconnect switch.
• Open the Door. The door is secured with turn-type latches,
plus one Phillips-head securing screw. Keep the securing screw.
• A long wire hook is provided inside one of the lter racks to
help with lter removal. You will need to use both sets of
doors to change the lters.
• Use the hook to remove all (16) lters and dispose of them.
Replace all (16) lters. Return the hook to a convenient
location inside the Unit.
• Close door; reinstall securing screw. NOTE: Always replace
securing screw when reinstalling door.
Filters must be used or the energy exchange core will
become blocked by dust and the unit will not do its job.
In extreme cases components may be damaged.
Filter Specications:
(16) 20” x 25” x 2” or 4” (nominal) pleated lters
Actual size: 19.5” x 24.5” x 1.75” or 3.75”
Unit shipped with MERV-8 Filters.
Optional MERV-13 Filters are available.
Minimum recommended effectiveness: MERV-6
BLOWER INSPECTION
• Inspect Blowers every time you change the lters.
• Conrm bearings are still secure to blower shaft. It should not be
possible to move the blower shaft back and forth along its length.
• Conrm blower wheel is not rubbing against the blower inlet
or housing.
CHECK BLOWER BELT TENSION
• Check belt tension every time you change the lters.
• Inspect belt(s) for cracking or uneven wear. Uneven wear may
indicate that sheaves are improperly aligned.
• See section SHEAVE ALIGNMENT AND BELT TENSIONING (page
16) for additional details
Incorrect Belt Tension will damage this blower!
GENERAL CLEANING AND INSPECTION
• Perform general cleaning and inspection when changing lters.
• Remove dust from blower wheels periodically.
• Remove paper, leaves, etc. from inlet and outlet screens.
• Inspect for insect nests.
BEARING LUBRICATION
The blowers in this unit are equipped with permanently-lubricated
bearings; the grease ttings are used only for initial lubrication
at the factory. NOTE: do not attempt to lubricate the blower
bearings.
If the motors used in this ERV are equipped with grease ttings,
motors must be lubricated as part of routine maintenance. Use
Exxon Polyrex or equivalent at 2500 operating hour intervals.

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To re-install the cores:
1. start the bottom corner ange of the core about an inch into
the receiver in the unit, then start one side ange in to its
receiver.
2. Taking care not to drop the core, start the other side ange,
and then the top ange.
3. Push core gently and evenly into place, repeat with the next
core. Don’t compress the end-pan gaskets yet.
4. When the front-most core is in place, place the vertical
sealing bar in position. Gently push the front core back until
its face aligns properly against the back of the sealing bar.
MAINTENANCE
inf[email protected]m
TO CLEAN THE ENERGY EXCHANGE CORE
Clean the core annually.
• Remove the lters.
• Vacuum the exposed faces of the energy exchange core with
a soft brush.
• Vacuum out dust from the rest of the unit case.
• Install new lters.
Do not wash the energy exchange core.
Keep it away from water or re to avoid damaging it.
Always handle the core carefully.
It is not recommended the remove the energy
exchange cores unless there is no other way to gain
access to other components that require service.
TO REMOVE ENERGY EXCHANGE CORES FOR ACCESS TO OTHER
COMPONENTS
To remove cores (see illustration):
1. Remove cross pieces (retain screws)
2. Remove vertical sealing bar (retain screws).
3. Carefully grasp core(s) by the metal end plate, near the
corners. (Or use glass-handling suction cups.) Gently pull out;
it may be helpful to wiggle the core slightly so that rst one
corner, then another advances out of the unit.
The white faces of the core can be damaged. Handle
with care.

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See more specic Installation and Operation Manual for additional
Assembly, Start-Up, Commissioning and Maintenance supplied
with the unit and Manuals at www.renewaire.com.

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