RenewAire LE10XRT User manual

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
138276_000 LE10XRTMan_Dec15.indd 12/2015 www.renewaire.com Page 1
4510 Helgesen Drive, Madison, WI 53718
[phone], [phone], Fax: [phone]
[email protected] www.renewaire.com
LE10XRT
Table of Contents
FOR THE SPECIFIER AND INSTALLER.................................2
FOR THE ELECTRICIAN.................................................8
FOR THE CONTROL CONTRACTOR..................................11
FOR THE TEST, BALANCE, &COMMISSIONING CONTRACTOR..15
SERVICE PARTS.........................................................18
MAINTENANCE.........................................................19
www.renewaire.com (800) 627- 4499 [email protected]
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.
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NOTE
LE10XRT can be delivered in two modules for on-site
assembly or as a complete unit (additional charges apply).
In all cases the exhaust and outdoor air weatherhoods
ship loose and require later installation on the unit.
See Separate SHIPPING &RIGGING Manual for information
on shipping considerations, and moving and lifting the
unit as separate modules or as a complete unit.

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
138276_000 LE10XRTMan_Dec15.indd 12/2015 www.renewaire.com Page 2
FOR THE SPECIFIER AND INSTALLER
PHYSICAL CONFIGURATION OPTIONS
The LE10XRT 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
Description of Duct Connection
Conguration
Mounting
Option
LE10XRTV Room Air [RA] enters bottom of unit.
Fresh Air [FA] exits bottom of unit.
Roof Curb
LE10XRTR Room Air [RA] enters bottom of unit.
Fresh Air [FA] exits side of unit.
Roof Curb
LE10XRTF Room Air [RA] enters side of unit.
Fresh Air [FA] exits bottom of unit.
Roof Curb
LE10XRTH Room Air [RA] enters side of unit.
Fresh Air [FA] exits side of unit.
Equipment Rail
NOTE: Before installing unit, conrm the duct conguration was specied
correctly for your installation requirements.
RA = Room Air into unit
OA = Outside Air into unit
FA = Fresh Air to inside
EA = Exhaust Air to outside
RA
EA
FA
LE-RTV
LE-RTR
LE-RTF
LE-RTH
OA
RA
EA
OA
RA
EA
FA
OA
EA
OA
FA
RA
FA
LE-RT Configurations_DEC15.dwg
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.
NOTE: Provide service access to the unit to allow for cleaning
the core and lter.

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
138276_000 LE10XRTMan_Dec15.indd 12/2015 www.renewaire.com Page 3
6 CORE: "J" = G5 21 OPTION 1: 24V TRANSFORMER
MODEL
NUMBER
STANDARD
FEATURES
16-17 UNUSED IN THESE MODELS
"T" = TR (TRANSFORMER WITH ISOLATION RELAY)
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
RESTRICTIONS:
1:VOLTAGE CODES "4" & "8" AVAILABLE WITH
PHASE CODE "3" (THREE-PHASE) ONLY.
2: PHASE CODE "1" SINGLE PHASE ONLY
AVAILABLE WITH MOTOR CODES "D", "F", AND
"G".
3:SOME UNITS WITH CUSTOM "X" CODE ARE
NOT SAFETY LISTED.
J - - T LE10X RT
11WALL TYPE: "S" = SINGLE, "D" = DOUBLE
12PHASE: "1" = SINGLE-PHASE, "3" = THREE-PHASE
19
22
25 SAFETY LISTING (RESTRICTION 3)
MULTIPLE-CHOICE OR
OPTIONAL FEATURES
9BASE TYPE
"V", "H", "R", "F"
13VOLTAGE: (SEE RESTRICTION 1)
20
"4" = 460V, "5" = 208-230V, "8" = 575V
24
"L" = LISTED "N" = NON-LISTED
OPTION 4: OTHERS
"-" = NONE
"W" = WHITE PAINT
"C" = CUSTOM PAINT
"X" = CUSTOM UNIT
UNIT CONTROL
DISCONNECT
"N" = NON-FUSED (STANDARD)
"F" = FUSED
OPTION 2: FILTER MONITOR
"-" = NONE,
"F" = FILTER MONITOR BOTH AIRSTREAMS
23 SHIPPING CONSTRUCTION& DEFROST
"A" =ASSEMBLED
"M"=MODULAR
"Q" = DEFROST ASSEMBLED CONSTRUCTION
"R" = DEFROST MODULAR CONSTRUCTION
"A" = STANDARD UNIT CONTROL WIRING
"V" = ONBOARD VFD BOTH AIRSTREAMS
"F" = ONBOARD VFD FA AIRSTREAM
"E" = ONBOARD VFD EA AIRSTREAM
10
VIBRATION ISOLATORS
"N" -NEOPRENE ISOLATORS
"S"-SPRING ISOLATORS
15EA HORSEPOWER14 FA HORSEPOWER
"D"=3 HP Low Speed
"F"=3 HP Medium Speed
"G"=3 HP High Speed
"J"=5 HP Low Speed
"K"=5 HP Medium Speed
"L"=5 HP High Speed
"M"=7.5 HP Low Speed
"N"=7.5 HP Medium Speed
"P"=7.5 HP High Speed
"Q"=10 HP Medium Speed
"R"=10 HP High Speed
DAMPERS
"-" = NO DAMPERS (STANDARD)
"D" = DAMPERS BOTH AIRSTREAMS
"E" = DAMPER EA AIRSTREAM
"F" = DAMPER FA/OA AIRSTREAM
18
(SEE RESTRICTION 2)
LE10XRT MODELS
COMMERCIAL PRODUCT CODE CHART
LE SERIES CONFIGURATION CHART
LE10XRT DIMENSIONS DRAWING
73 3/8"
Lift Lugs
111 1/8" Overall
69 1/8" Case
2"
2" Typ.
4"
C
L
2 1/4"
Wiring
Pressure
Ports
(4) Typ.
4 1/2" 93 5/8"
8 3/4"
47 1/4"
202 5/8" Case
205 3/8" Overall
24" X 48"
RA Inlet
(RTH, RTF)
OA Inlets
OA Damper
Locations
(Optional)
29 5/8"
53 1/2"
84 5/8"
37 7/8"
44 5/8"
69 5/8" Case
71 1/8" Overall
9"
47 1/4"
C
L
5 1/4"
(2)
7/8"
Knockouts
C
L
11 3/8"
(5)
1 1/8"
Knockouts
E-Box
Disconnect
Switch
EA Outlet
EA Damper
Location
(Optional)
15 1/2" X 13 3/8"
Electrical
Connection
Cover
24" X 48"
FA Outlet
RTH, RTR
79 7/8"
Minimum
Blower
Service
Area Typ.
36" E-Box
Minimum
Service Area
111" Minimum
Service Area
72 1/8"
Typ.
17 3/8"
49 3/8"
69 3/4" Minimum
Service Area
RA (RTV, RTR)
24" X 48"
FA (RTV, RTF)
19" X 48"
Door
Swing
Door
Swing
Door
Swing
Door
Swing
EA
OA
OA
64 1/4" O.D.
41 1/8"
49"
195 1/4" O.D.
20"
9 1/2"
25"
3"
60 1/2" I.D.
191 1/2" I.D.
A
A
TOP VIEW
CURB LE10X
FA RA
1 7/8"
14"
3"
SECTION
A-A
CURB CROSS-SECTION A-A (TYP.)
1 1/2" X 1/4"
Neoprene Gasket
3/4" X 3 1/2"
Wooden Nailer
TOP VIEW
FRONT VIEW LEFT VIEW RIGHT VIEW
RTH, RTR
ONLY
FA
EA
OA
RTH, RTF
ONLY
RA
RTH, RTR
ONLY
FA
RTV, RTF
ONLY
FA
RTV, RTR
ONLY
RA
Model: LE10XRT
Drawing Type: Unit Dimension
Version: NOV15
ABBREVIATIONS
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
FA: Fresh Air to inside
RTV: Rooftop Vertical RA & FA
RTF: Rooftop Vertical FA Only
RTR: Rooftop Vertical RA Only
RTH: Rooftop Horizontal RA & FA
INSTALLATION ORIENTATION
Unit must be installed in orientation
shown.
NOTE:
1. UNLESS OTHERWISE SPECIFIED,
DIMENSIONS ARE ROUNDED TO THE
NEAREST EIGHTH OF AN INCH.
2. SPECIFICATIONS MAY BE SUBJECT
TO CHANGE WITHOUT NOTICE.
NOTE: Provide service access to allow for
cleaning the core and lter replacement.

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
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COGS AND CORNER WEIGHTS
73.5" Lifting Lug
LR RR
LF RF
194.5" Lifting Lug
BASIC UNIT WEIGHTS (lbs.)
Motors UNIT LF LR RR RF
3 HP 3032 842 841 674 674
3046 847 846 676 676
3164 892 890 690 691
5 HP
7.5 HP
Options UNIT LF LR RR RF
ADDITIONAL WEIGHTS FOR OPTIONS (lbs.)
Double Wall 627 155 158 158 155
15 13 1 0 1
217140 0
70 0 0 36 35
VFDs
EA Damper
OA 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.
CORNER WEIGHTS AT LIFTING LUGS
"B"
"A"
10 HP 3202 906 904 695 696
Center of gravity: A=32" B= 99-1/2" (+/- 2")
11/24/2015 KMC
SPECIFICATIONS SUBJECT
TO CHANGE WITHOUT NOTICE.
RenewAire LLC
Do not scale drawing
LE10X-RT_CORNER_WEIGHTS_NOV15.dwg
LE10X-RT Corner Weights
Sheet 1 of 4

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
138276_000 LE10XRTMan_Dec15.indd 12/2015 www.renewaire.com Page 5
On Roof Curbs:
The base of the LE10XRT Unit is designed for installation on our
optional Roof Curb. See drawing below.
Before installing LE10XRT, apply roong and counterashing to
Roof Curb as per standard practice.
Install appropriate gasket on top of Roof Curb.
See Also “OPTIONAL CURB CLIPS”, below, for an example of curb-
to-roof-deck fastener schedule appropriate for a specic wind load.
On Equipment Rails:
Review drawing of Roof Curb and specify Equipment Rail to t.
Before installing LE10XRT, apply roong and counterashing to
Equipment Rails as per standard practice.
Air leakage from the conditioned space below the
roof into the space between inside the curb can cause
problems including:
• Condensation inside the curb in cold weather, to the
point that water drips into the building and damages
duct insulation or furnishings.
• Leakage of noise from the unit into the space below.
Holes through the roof deck for the ducts should be
cut close to the ducts and the gaps should be sealed.
CURBS
CURB DIMENSIONS
SECURE UNIT TO THE CURB OR EQUIPMENT RAILS
RenewAire strongly recommends that you secure rooftop units
properly to the curb or equipment rails, and thus to the building
structure. Strong winds, tornados, and hurricanes can and do
displace or remove rooftop equipment from rails or curbs. When
this happens, the equipment, adjacent roof structure, and even
vehicles parked near the building can be damaged, and rain
typically enters the building. The equipment is put out of service
and the collateral damage can be very expensive.
At a minimum, observe locally applicable codes, but note that
even if local codes require some attachment means that may not
be enough to withstand common wind occurrences.
Danger of damage or severe injury if high winds move
this unit. Secure unit to structure! Observe local code
requirements at a minimum!
OPTIONAL CURB CLIPS
If the optional Curb Clip Kit was supplied, the Clips must be
installed on the curb before installing the unit. REFER TO
INSTRUCTIONS SUPPLIED WITH THE CURB CLIP KIT.


































LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
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VIBRATION ISOLATION
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 for additional technical information.
Blower discharges are connected to the Outlets with exible duct
to minimize vibration bypass around the isolators.
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.
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DUCT CONNECTIONS
Any 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.
Connect ducts to these anges with standard S-Slips. Seal duct
exterior to the unit to keep the weather out.
Any duct connections to the bottom of the unit are made to the
duct supports on the optional roof curb. The sizes of the duct
openings in the curb allow for 1” of insulation on duct in addition
to duct ID sizes shown on dimension drawings, page 5.
If the inside ducts run through un-conditioned spaces,
they must be insulated, with a sealed vapor barrier on
both inside and outside of insulation.
Any ductwork that is exposed to the weather must be
properly insulated and weather-proofed.
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.
At the Curb:
Cut the holes in the roof deck to t closely around the duct(s) passing
through the roof deck. Seal all gaps around the duct(s) at the roof deck.
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 LE10XRT 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.
SETTING AND INSTALLING THE UNIT
ON THE CURB OR EQUIPMENT RAILS
Install ducts that pass through the curb before setting the unit.
Install optional Curb Clips to the Curb before setting the unit.
See separate Shipping &Rigging Manual.
VIBRATION ISOLATOR SPECIFICATIONS, DESIGN LOADS
AND DISTURBING FREQUENCIES
Isolator Type NEOPRENE SPRING
Isolator Location Back/Motor
End
(Black)
Blower
Front End
(Blue)
Back/
Motor End
(Orange)
Blower
Front End
(Brown)
Quantity 4 2 4 2
Rated Max Load (lbs) 170 135 225 125
Rated Max Deection (in.) 0.50 0.50 1.30 1.30
Spring Rate (LB/IN) 340 270 173 96
Design Load (LB each)* 95-111 75-90 95-111 75-90
Final Height Not adjustable Adjust to 4.2”
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

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
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INSTALLING THE WEATHERHOODS
NOTE: If Unit is equipped with Outside Air Dampers AND was
shipped in two modules, a control wiring interconnection for the
two dampers must be completed before installing the Outside Air
Weatherhoods. See Page 8 for instructions.
Outside Air Hood (see illustration):
Remove and keep the screws from the roof panel overhang.
Slide the top ange of the Outside Air Hoods under the roof
panel overhang.
Reinstall screws.
Install screws along sides and lower ange of hoods.
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Exhaust Air Hood (see illustration):
Remove and keep the screws from the upper side panel overhang.
Slide the top ange of the Outside Air Hoods under the upper side
panel overhang.
Reinstall screws.
Install screws along sides and lower ange of hoods.
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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. 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 (plug may be directly mounted
with screws), 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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LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
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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 L3
terminals unless power has been disconnected at an
upstream location.
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
Re-install the nger-safe guard after connecting the
power supply conductors to the L1, L2 &L3 on the
Disconnect Switch
POWER SUPPLY WIRING FOR ALL UNITS
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.

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FOR THE ELECTRICIAN
BASIC UNIT OPERATION CHECK
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 8 for
connection instructions.
4. IF optional Exhaust Air or 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 9 for
connection instructions.
5. Conrm Overload Relays on the Motor Starters are set correctly.
6. Shut front and rear doors to Unit.
7. 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.
8. OPTIONAL FOR MAXIMUM SAFETY – re-install E-Box Cover. If
the unit has any VFDs, leave the keypads access cover off.
9. 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.
www.renewaire.com (800) 627- 4499 [email protected]

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
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FOR THE CONTROL CONTRACTOR
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.
ON-BOARD 24VAC CLASS 2 POWER SUPPLY
This ERV is provided with a Class II 24VAC power supply system
that operate unit contactors, dampers, and/or relays. 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.
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). Unless it is provided in VFDs.
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.
8. Units equipped with VFDs can communicate with
BACnet systems.
www.renewaire.com (800) 627- 4499 [email protected]
Transformer Speci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
steadystate load does not exceed 8VA.
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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TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC 24VAC
1L1 2T1
3L2 4T2
5L3 6T3
96 95
C
A2
A1
MOTOR STARTER (EA)
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
96 95
C
A2
A1
MOTOR STARTER (FA)
T1
L2 T2
L3 T3
L1
FUSES (opt.)
UNIT DISCONNECT
14
35
C
RELAY (FA)
14
35
C
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
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC
GND
POWER SUPPLY
1-PHASE 60 Hz
SEE UNIT RATING
LABEL FOR PHASE,
VOLTAGE, MCA AND
MOPD
MOTOR
FA
MOTOR
EA
1
2
3
4
5
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
P1 WIRING SCHEMATICS
TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC 24VAC
1L1 2T1
3L2 4T2
5L3 6T3
96 95
C
A2
A1
MOTOR STARTER (EA)
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
96 95
C
A2
A1
MOTOR STARTER (FA)
MOTOR
FA
MOTOR
EA
T1
L2 T2
L3 T3
L1
FUSES (opt.)
UNIT DISCONNECT
14
35
C
RELAY (FA)
14
35
C
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
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC
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
P3 WIRING SCHEMATICS

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
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FOR THE CONTROL CONTRACTOR
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.
Make sure the control provides no voltage or current at
its output terminals.
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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.
EXTERNAL CONTROL CONNECTIONS
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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).

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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.
FOR THE CONTROL CONTRACTOR
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.
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.
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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TABLE: CLEAN-FILTER PRESSURE DROP (in.w.g.)
Airow (CFM) 2500 3125 3750 4375 5000 5625 6250 6875 7500 8125 8750 9375 10000 10625
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.
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FILTERS
(20) 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 removing
positioning nuts and bolts near door ends and sliding lter anges
outward to the ends of the slots. Replace positioning bolts and nuts.
LE10XRT AIRFLOW PERFORMANCE
* Performance Ratings assume standard-equipment 2” MERV-8 lters in clean condition.
NOTE: Motors tted with VFDs can be operated over the entire range shown for that motor’s HP in the chart above.
Airflow
CFM
External Static Pressure (in.w.g.)
0.00 0.25 0.50 0.75 1.00 1.25 1.50 1.75 2.00
BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM BHP RPM
3 HP LOW SPEED 3 HP MED SPEED 3 HP HIGH SPEED
2500 1.0 640 1.2 740 1.5 820 1.7 880 2.0 950 2.3 1000 2.6 1060
3000 1.1 660 1.4 760 1.7 830 2.0 900 2.3 960 2.6 1020 2.9 1070
3500 1.3 690 1.6 770 1.9 850 2.2 920 2.5 980 2.9 1040 3.2 1090
5 HP HIGH
SPEED
4000 1.5 710 1.8 790 2.1 870 2.5 930 2.8 1000 3.2 1060 3.6 1110
4500 1.4 650 1.7 740 2.1 810 2.4 890 2.8 950 3.2 1020 3.6 1070 3.9 1130
5000 1.7 680 2.0 760 2.4 840 2.7 910 3.1 970 3.5 1030 3.9 1090 4.4 1150
5500
3 HP LOW
SPEED
1.7 650 2.0 720 2.4 800 2.7 870 3.1 930 3.5 990 3.9 1050 4.4 1110 4.8 1170
6000 2.1 690 2.4 760 2.8 830 3.1 890 3.5 960 4.0 1020 4.4 1080 4.8 1130 5.3 1190
7.5 HP
HIGH
SPEED
6500 2.5 740 2.8 800 3.2 870 3.6 930 4.0 980 4.4 1040 4.9 1100 5.3 1160 5.8 1210
7000 3.0 790 3.3 850 3.7 900 4.1 960 4.5 1010 5.0 1070 5.4 1120 5.9 1180 6.4 1230
7500 5 HP LOW
SPEED
3.5 840 3.9 890 4.3 940 4.7 990 5.1 1040 5.5 1100 6.0 1150 6.4 1200 6.9 1250
8000 4.1 880 4.5 930 4.9 980 5.3 1030 5.7 1070 6.1 1120 6.6 1170 7.0 1220 7.5 1270
8500 5 HP MED
SPEED 4.8 930 5.2 970 5.5 1010 5.9 1060 6.3 1100 6.8 1150 7.2 1200 7.7 1240 8.1 1290
10 HP
HIGH
SPEED
9000 7.5 HP LOW
SPEED
5.5 970 5.9 1010 6.2 1050 6.6 1090 7.0 1130 7.4 1170 7.8 1220 8.3 1260 8.7 1300
9500 6.2 1010 6.6 1050 6.9 1080 7.3 1120 7.7 1160 8.1 1200 8.5 1240 8.9 1280 9.3 1310
10000 7.5 HP MED
SPEED 7.0 1050 7.3 1080 7.7 1110 8.0 1150 8.4 1180 8.7 1220 9.1 1250 9.5 1290 9.9 1320
10500 7.8 1080 8.1 1110 8.4 1140 8.7 1170 9.1 1200 9.4 1230 9.7 1260
11000 8.6 1110 8.9 1140 9.2 1160 9.4 1190 9.7 1220
10 HP MED SPEED 10 HP HIGH SPEED

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
138276_000 LE10XRTMan_Dec15.indd 12/2015 www.renewaire.com Page 16
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-10X-RT 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) 2240 3540 4780 5940 7040 8080 9040 9940 10760
RA Airow (CFM) 2310 3600 4880 6140 7360 8580 9780 10940 12090
www.renewaire.com (800) 627- 4499 [email protected]
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.
NOTE: Motors controlled by factory installed VFDs are provided
with xed sheaves. The entire speed range that can be achieved
with the variable sheave options for that motor can be reached
by adjusting the VFD.
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 be less apt to 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.
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TABLE OF SHEAVE ADJUSTMENTS FOR LE10X UNITS
Motor HP Blower
Speed Blower RPM Available by Variable Sheave Adjustment Motor Sheave
Blower
Sheave
3 HP LOW 633 655 676 695 714 735 755 776 796 817 837 1VP44 BC90
3 HP MED 755 776 796 817 837 858 878 898 918 939 959 1VP50 BC90
3 HP HIGH 878 902 925 949 972 996 1020 1044 1067 1091 1115 1VP50 BK80
5 HP LOW 755 776 796 817 837 858 878 898 918 939 959 2VP50 D4900
5 HP MED 878 902 925 949 972 996 1020 1044 1067 1091 1115 2VP50 D4780
5 HP HIGH 1000 1021 1041 1062 1082 1102 1122 1143 1163 1184 1204 2VP62 D4900
7.5 HP LOW 878 898 918 939 959 980 1000 1021 1041 1062 1082 2VP56 D4900
7.5 HP MED 1000 1021 1041 1062 1082 1102 1122 1143 1163 1184 1204 2VP62 D4900
7.5 HP HIGH 1122 1143 1163 1184 1204 1225 1245 1266 1286 1306 1326 2VP68 D4900
10 HP MED 1000 1021 1041 1062 1082 1102 1122 1143 1163 1184 1204 2VP62 D4900
10 HP HIGH 1122 1143 1163 1184 1204 1225 1245 1266 1286 1306 1326 2VP68 D4900
Note that Low, Medium and High Blower RPM sheave settings overlap allowing some adjustability into lower or higher Blower Speed zones.
Variable Sheaves can be adjusted by half-turns.
Use only BX-type cogged drive belts.

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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, 7.5, and 10HP 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”
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 – FIXED DIAMETER MOTOR SHEAVE PROVIDED FOR UNITS
WITH VFDs
The motor xed sheave diameter for units with VFDs is equal to or
greater than the sheave diameter of the largest variable motor sheave
setting used at that HP for the LE unit. 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 operating frequency down to prevent this.
Failure to follow start-up procedures may cause early
equipment failure!
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www.renewaire.com (800) 627- 4499 [email protected]

LE10XRT Due to continuing product development, specications are subject to change without notice. © 2016 RenewAire LLC
138276_000 LE10XRTMan_Dec15.indd 12/2015 www.renewaire.com Page 18
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.
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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EXAMPLE CONFIGURATION CODE: LE10XJRTVNS35RR---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 can use both sets of doors to
change the lters. Alternatively, lters can be changed from
one unit end if lter spacers are used to draw lters out with
rope or cable (not supplied).
• Use the hook to remove all (20) lters and dispose of them.
Replace all (20) 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:
(20) 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 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
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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.
See Supplemental Manuals:
LE models Shipping, Rigging, Lifting & Assembly Manual and
Factory Installed VFD Manual for additional assembly and
start-up information supplied
with the unit and at www.renewaire.com.