RenewAire HE1.5XRTV Instruction manual

INSTALLATION, OPERATION & MAINTENANCE MANUAL
ENERGY RECOVERY VENTILATOR
HE1.5XRT
WWW.RENEWAIRE.COM
MODEL: HE1.5XRT

ERV HE1.5XRT
WWW.RENEWAIRE.COM INSTALLATION, OPERATION AND MAINTENANCE MANUAL 1.800.627.44992
HE1.5XRT info...................... 2-7
Installation......................... 8-19
Start-up............................20-21
Maintenance.....................22-23
TABLE OF CONTENTS
HE1.5XRT INFO
IMPORTANT SAFETY INFORMATION
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 discon-
nect 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 qualified professional(s) in accordance
with all applicable codes, standards and licens-
ing requirements.
4. Any structural alterations necessary for instal-
lation 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 dam-
age to unit or property if high winds move this
unit. Secure this unit to the building!
7. Sufficient air is needed for proper combustion
and exhausting of gases through the flue (chim-
ney) of fuel burning equipment that might be in-
stalled in the area affected by this equipment. If
this unit is exhausting air from a space in which
chimney-vented fuel burning equipment is locat-
ed, take steps to assure that combustion air sup-
ply is not affected. Follow the heating equipment
manufacturer’s requirements and the combus-
tion 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.
RISK OF FIRE, ELECTRIC SHOCK, OR INJURY. OBSERVE ALL CODES AND THE FOLLOWING:
WARNING
The unit’s fresh air inlet should be at least 10’ away from any exhaust, such as dryer vents, chimneys,
furnace and water heater exhausts, or other sources of contamination or carbon monoxide. Do not locate the
fresh air inlet where vehicles may be serviced or left idling. Never locate the unit inside a structure.
Danger of damage or severe injury if high winds move this unit. Secure unit to structure. Observe local code
requirements at a minimum.
WARNING
WARNING
DANGER OF INJURY
OR DAMAGE.
The motors in this unit must not be
run at an amperage that exceeds
the motor’s rated full load amps.
It is the installer’s responsibility to
measure the operating amperage
of each motor. If the full load amp
rating is exceeded, the amp draw
must be reduced by reducing
airflow with an external damper.
Failure to make this adjustment
may result in unsafe motor
winding temperatures or tripping
of the motor thermal protection.
Standard HE1.5XRT with single phase original
equipment motors are NOT suitable for use with
solid state speed control.
Three phase motors are NOT suitable for use with
solid state speed control. If speed control is desired
use the VFD option.
Single phase ECM motors are NOT suitable for use
with solid state speed control. They already have
speed control built into the motor electronics.
Le HE1.5XRT avec moteurs d’équipement d’origine
monophasés ne convient pas pour une utilisation avec
regulateur de vitesse electronique.
Moteurs de trois phase ne convient pas pour utilisation
avec regulateur de vitesse electronique. Si la régulation
de vitesse est souhaité, utiliser l’option VDF.
Moteurs d’une phase de l’ECM ne conviennent pas pour
une utilisation avec regulateur de vitesse electronique.
Ils ont déjà le contrôle de vitesse intégré dans le moteur
électronique.
WARNING
Danger of injury if unit starts
unexpectedly. Switch power off
at service disconnect. Lock-out/
tag-out the disconnect.
WARNING
WARNING
RISK OF INJURY OR DAMAGE.
Motor has an automatic reset thermal protector. Disconnect power before servicing or resetting motor thermal
protector. Use caution, motor may be hot. The motor must cool before it resets the thermal protector.
If the motor thermal protector tripped, correct the issue that caused the motor to overheat (e.g. over motor rated
amperage or locked rotor).

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HE1.5XRT CONFIGURATION CHART
MODEL NUMBER
"V", "H", "R", "F"
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
J - - -
DIGIT NUMBER
Orientation
Digit 9:
Wall Type
Digit 11:
"S" = Single
"D" = Double
Phase
Digit 12:
"1" = Single Phase
"3" = Three Phase
Voltage (see Restriction 1 & 2)
Digit 13:
"1" = 115V
"4" = 460V
"5" = 208-230V
"9" = 277V
FA Horsepower (see Restriction 3 & 7)
Digit 14:
"S" = Standard Impellers
"E" = EC Impellers
EA Horsepower (see Restriction 3 & 7)
Digit 15:
"S" = Standard Impellers
"E" = EC Impellers
Flow Control*
Digit 18:
"-" = No Isolation Dampers (with no Bypass)
"D" = Motorized Damper both Airstreams (with no Bypass)
"E" = Motorized Damper EA or RA Airstream (with no Bypass)
"F" = Motorized Damper FA or OA Airstream (with no Bypass)
"S" = Backdraft Damper OA Airstream (with no Bypass)
"R" = Backdraft Damper EA Airstream (with no Bypass)
"B" = Backdraft Damper both Airstreams (with no Bypass)
"T" = Motorized Damper OA, Backdraft Damper EA (with no Bypass)
*NOTES:
Digit 6 "J" = G5 Core Type Digits 10, 16 and 17 are not used in these models.
*Digit 18: Flow Control: Codes for Bypass: Face damper also acts as Isolation damper in EA or RA Airstream.
Restrictions:
1: Voltage Codes "1" & "9" only available with Phase Code "1" (Single-Phase).
2: Voltage Codes "4" & "8" only available with Phase Code "3" (Three-Phase).
3: Motor Codes "EE" (EC Motors) only available with Phase Code "1" (Single Phase)
4: Unit Control Code "G" (Terminal Strip) only available with Motor Codes "EE" (EC Motors).
5: Some units with Other Options Code "X" are not safety listed.
6: Unit Control "A" not available with Unit Control Enhancements Codes "1", "2", "3" & "4".
7: Voltage Code "9" not available with FA/EA Horsepower Codes "EE".
8: Unit Control Codes "V", "E" & "F" not available with Voltage Code "1".
Disconnect
Digit 20:
"N" = Non-Fused (STANDARD)
"F" = Fused
Unit Control Enhancements (see Restriction 6)
Digit 21:
"T" = Transformer with Isolation Relay (STANDARD)
"1" = Enhanced Controls
"2" = Premium Controls
"3" = Enhanced Controls with BACNET License
"4" = Premium Controls with BACNET License
Filter Options
Digit 22:
"-" = None
"F" = Filter Monitor Both Airstreams
Other Options
Digit 23:
"-" = None (Reserved)
Paint and Customization
Digit 24:
"-" = None
"W" = White Paint
"C" = Custom Paint
"X" = Custom Unit
Safety Listing (see Restriction 5)
Digit 25:
"L" = Listed
"N" = Non-Listed
-5.1EH RT
Unit Control (see Restriction 8)
Digit 19:
"A" = Standard Unit Control Wiring
"D" = Independent Blower Control
"G" = Terminal Strip for EC Motors
"V" = Onboard VFD Both Airstreams
"F" = Onboard VFD FA Airstream
"E" = Onboard VFD EA Airstream
HE1.5RT MODEL
PRODUCT CODE CHART
NOTE: RenewAire reserves the right to make changes in the design or specifications of products at any time without notice. Unless otherwise
specified, dimensions are rounded to the nearest eighth of an inch.
HE1.5XRT INFO

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SPECIFICATIONS & DIMENSIONS
Specifications may be subject to change without notice.
ROOFTOP UNIT SPECIFICATIONS
Ventilation Type:
Static plate, heat and humidity transfer
Typical Airflow Range: 375-1,575 CFM
AHRI 1060 Certified Core:
One L62-G5 and one L125-G5
Standard Features:
Non-fused disconnect
24 VAC transformer/relay package
Filters:
Total qty. 4, MERV 8: (2) 14" x 20" x 2" and
(2) 16" x 20" x 2"
Unit Dimensions & Weight:
86" L x 33 1/4" W x 56 3/4" H
387-548 lbs., varies by option(s)
Max. Shipping Dimensions & Weight (on pallet):
70" L x 47" W x 83" H
615 lbs.
Motor(s):
Qty. 2, 1.0 HP ea., Direct drive standard motorized
impeller packages
Options:
Qty. 2, EC Motor (see HE1.5XRT EC Motor submittal) -
1.0 HP 120V/1Ph/60HZ,
1.0 HP 208-230V/1Ph/60HZ
Integrated programmable controls
Fused disconnect
Double wall construction
Factory supplied and mounted variable frequency
drives (VFDs) - one or both airstreams
Gravity backdraft dampers
Class 1 low leakage motorized isolation dampers -
FA, EA or both airstreams
Qty. 2, Factory mounted filter alarms
Independent blower control
Exterior paint - white, custom colors
Accessories:
Filters - MERV 13, 2" (shipped loose)
Backdraft damper - OA or EA
Roof curb - standard 14"
Curb wind clip
Engineered combo curb for Carrier RTU
Engineered combo curb for Trane RTU
Digital time clock - wall mount (TC7D-W),
in exterior enclosure (TC7D-E)
Motion occupancy control - ceiling mount (MC-C),
wall mount (MC-W)
Carbon dioxide control - wall mount (CO2-W),
duct mount (CO2-D)
Electric duct heater - EK series (1–60 kW); designed
for indoor ductwork installation only
Indirect gas-fired duct furnace - GH series
(50-400 MBH), installed downstream of any fans
Standard Electrical Specifications Optional Factory Installed
VFD Electrical Specifications
HP Volts HZ Phase FLA
per motor
Min.
Cir.
Amps
Max.
Overcurrent
Protection
Device
FLA
per motor
Min. Cir.
Amps
Max.
Overcurrent
Protection
Device
1.0 120 60 Single 6.5 14.6 20
1.0 208-230 60 Single 3.3-3.4 7.7 15
1.0 277 60 Single 2.7 6.1 15
1.0 208-230 60 Three 2.2-2.2 5.0 15 2.2 - 2.2 5.4 15
1.0 460 60 Three 1.1 2.5 15 1.1 2.8 15
ELECTRICAL DATA CORE PERFORMANCE
ThermalPerformanceRatingsG52015.2.xlsx HE1.5X(IOM)
30%
50%
70%
90%
300 600 900 1,200 1,500
Effectiveness (%)
Airflow (CFM)
At AHRI 1060 standard conditions.
See all AHRI certified ratings at www.ahrinet.org.
AIRFLOW PERFORMANCE
Motor HP
Phase
External Static Pressure (Inches Water Column)
0.0 0.25 0.50 0.75 1.00 1.25 1.50
1.0
Single Phase
1,535 CFM
1,540 Watts
1390 CFM
1515 Watts
1255 CFM
1485 Watts
1120 CFM
1445 Watts
970 CFM
1395 Watts
815 CFM
1310 Watts
640 CFM
1195 Watts
1.0
Three Phase
1,630 CFM
1,440 Watts
1485 CFM
1435 Watts
1335 CFM
1415 Watts
1170 CFM
1375 Watts
995 CFM
1325 Watts
810 CFM
1260 Watts
615 CFM
1180 Watts
Note: Watts is for the entire unit (2 motors).
Note: Airflow performance includes effect of clean, standard filter supplied with unit.
1.5XRT
HE Energy Recovery Ventilator
Standard
Download specification at:
renewaire.com/specifications
Specifications may be subject to change without notice.

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HE1.5XRT INFO
CONFIGURATIONS
The HE1.5XRT is available from the factory in four different configurations to meet different connection
requirements:
OPTION CODE DESCRIPTION OF
DUCT CONNECTION CONFIGURATION MOUNTING OPTION
HE1.5XRTV Room Air [RA] enters bottom of unit.
Fresh Air [FA] exits bottom of unit. Roof Curb
HE1.5XRTR Room Air [RA] enters bottom of unit.
Fresh Air [FA] exits side of unit. Roof Curb
HE1.5XRTF Room Air [RA] enters side of unit.
Fresh Air [FA] exits bottom of unit. Roof Curb
HE1.5XRTH Room Air [RA] enters side of unit.
Fresh Air [FA] exits side of unit. Equipment Rail
STANDARD CONFIGURATION
RA = Room Air into Unit
OA = Outside Air into Unit
FA = Fresh Air to Inside
EA = Exhaust Air to Outside
HE1.5XRTR
HE1.5XRTV
HE1.5XRTF HE1.5XRTH
EA
AR
AF
OA
HERT except 6x 8x, LERT
RTV
OA
AR
EA
FA
HERT except 6x 8x, LERT
RTR
AF
OA
EA
RA
HERTexcept 6x 8x, LERT
RTF
OA
RA
EA
FA
OA
HERT except 6x 8x, LERT
RTH

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HE-SERIES
43
86" Overall
5" Damper
Frames Typ.
C
L
2 1/2" Control In
C
L
5 5/8" Power In
42 7/8" Lift Lugs
OA
EA
RTV
ONLY
FA
RA
E-Box
Pressure Ports (4) Typ.
Disconnect
Switch
(2)
7/8" holes for
wiring in bottom of E-Box
FRONT VIEW
RTR
ONLY
FA
22 1/8"
Wiring
3 5/8"
56 3/4"
Overall
5 7/8"
C
L
26 1/8"
Wiring
54"
Case
FA (RTR) Damper Location (Optional)
EA Damper
Location (Optional)
LEFT VIEW
FA (RTR) 18" X 18" Duct Receiving Flange
33 1/4"
Overall
1 7/8"
29 3/4"
Lift Lugs
RIGHT VIEW
45 3/4" Case
32 5/8"
Case
10 1/8"
11 1/8"
32 1/4"
15 3/8"
55 5/8" Minimum
Service Area
24 3/4"
Minimum
Service
Area
FA (RTV)
14" x 16"
Opening
RA Opening 14" x 16"
TOP VIEW
Door Swing
Door Swing
FA (RTV) Damper Location (Optional)
2 1/8"
1 1/8"
17 1/8" I.D.
17 1/8" I.D.
4 1/4"
1 7/8"
38 1/2" I.D.
42 1/4" O.D.
24 1/2"
I.D.
28 1/4"
O.D.
A
A
FA
RA
TOP VIEW
CURB 1.5X
1 7/8"
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
Model: HE1.5X RTV/RTR Drawing Type: Unit Dimension Version: MAY18
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 RTR: Rooftop Vertical RA Only 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.
HE1.5XRT (RTV/RTR) Energy Recovery Ventilator Standard or EC Motor Option
AIRFLOW CONFIGURATION Available as shown:
UNIT MOUNTING & APPLICATION Must be mounted as shown. Airstreams can not be switched. Duct configuration is field convertible.
EA
AR
AF
OA
HERT except 6x 8x, LERT
RTV
OA
AR
EA
FA
HERT except 6x 8x, LERT
RTR

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SPECIFICATIONS & DIMENSIONS
86" Overall
C
L
2 1/2" Control In
C
L
5 5/8" Power In
42 7/8" Lift Lugs
OA
EA
RA
RTF
ONLY
FA
E-Box
Pressure Ports (4) Typ.
Disconnect
Switch
(2)
7/8" holes for
wiring in bottom of E-Box
FRONT VIEW
RTH
ONLY
FA
22 1/8"
Wiring
3 5/8"
56 3/4"
Overall
5 7/8"
C
L
26 1/8"
Wiring
54"
Case
FA (RTH) Damper Location (Optional)
EA Damper
Location (Optional)
LEFT VIEW
FA (RTH) 18" X 18" Duct Receiving Flange
6 3/8"
6"
33 1/4"
Overall
1 7/8"
29 3/4"
Lift Lugs
RIGHT VIEW
RA 18" X 18" Duct Receiving Flange
45 3/4" Case
32 5/8"
Case
10 1/8"
11 1/8"
15 3/8"
55 5/8" Minimum
Service Area
24 3/4"
Minimum
Service
Area
FA (RTF)
14" x 16"
Opening
TOP VIEW
Door Swing
Door Swing
FA (RTF) Damper Location (Optional)
2 1/8"
1 1/8"
17 1/8" I.D.
17 1/8" I.D.
4 1/4"
1 7/8"
38 1/2" I.D.
42 1/4" O.D.
24 1/2"
I.D.
28 1/4"
O.D.
A
A
FA
RA
TOP VIEW
CURB 1.5X
1 7/8"
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
Model: HE1.5X RTH/RTF Drawing Type: Unit Dimension Version: MAY18
ABBREVIATIONS EA: Exhaust Air to outside OA: Outside Air intake RA: Room Air to be exhausted FA: Fresh Air to inside RTF: Rooftop Vertical FA 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.
HE1.5XRT (RTH/RTF) Energy Recovery Ventilator Standard or EC Motor Option
AIRFLOW CONFIGURATION Available as shown:
UNIT MOUNTING & APPLICATION Must be mounted as shown. Airstreams can not be switched. Duct configuration is field convertible.
AF
OA
EA
RA
HERTexcept 6x 8x, LERT
RTF
OA RA
EA
FA
OA
HERT except 6x 8x, LERT
RTH

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PLACEMENT OF THE HE1.5XRT
The HE1.5XRT is designed for installation on a roof or other outside location. Select a location that is
central to the inside duct runs, and close to any other air handler that might be part of the system.
PLANNING
YOUR INSTALLATION
INSTALLATION
86" Overall
5" Damper
Frames Typ.
C
L
2 1/2" Control In
C
L
5 5/8" Power In
42 7/8" Lift Lugs
OA
EA
RTV
ONLY
FA
RA
E-Box
Pressure
Ports (4) Typ.
Disconnect
Switch
(2) 7/8" holes for
wiring in bottom of
E-Box
FRONT VIEW
RTR
ONLY
FA
22 1/8" Wiring
3 5/8"
56 3/4"
Overall
5 7/8"
C
L
26 1/8"
Wiring
54"
Case
FA (RTR)
Damper Location
(Optional)
EA Damper
Location
(Optional)
LEFT VIEW
FA (RTR)
18" X 18"
Duct Receiving
Flange
33 1/4"
Overall
1 7/8"
29 3/4"
Lift Lugs
RIGHT VIEW
45 3/4" Case
32 5/8"
Case
10 1/8"
11 1/8"
32 1/4"
15 3/8"
55 5/8" Minimum
Service Area
24 3/4"
Minimum
Service
Area
FA (RTV)
14" x 16"
Opening
RA
Opening
14" x 16"
TOP VIEW
Door
Swing
Door
Swing
FA (RTV)
Damper Location
(Optional)
2 1/8"
1 1/8"
17 1/8" I.D. 17 1/8" I.D.
4 1/4"
1 7/8"
38 1/2" I.D.
42 1/4" O.D.
24 1/2"
I.D.
28 1/4"
O.D.
A
A
FA
RA
TOP VIEW
CURB 1.5X
1 7/8"
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
Model: HE1.5X RTV/RTR
Drawing Type: Unit Dimension
Version: MAY18
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
RTR: Rooftop Vertical RA Only
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.
F1
It is the installer’s responsibility to make sure that
the screws or bolts used for securing the units
are properly selected for the loads and substrates
involved. Secure the HE1.5XRT so that it cannot fall
or tip in the event of accident, structural failure or
earthquake. See Rigging Information for unit weight.
RenewAire strongly recommends that you secure
rooftop units properly 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.
Provide Adequate Service Access for Maintenance. The HE1.5XRT will require regular filter and core
inspections. Install the HE1.5XRT where you can open the doors for cleaning the core and replacing the
filters, and where you can get at the wiring for installation and service. Observe all safety precautions when
working on roofs, including locating the unit away from roof edges, provision of safety railings and use of fall
protection equipment.
CAUTION
CAUTION
Provide service access to the unit to allow for cleaning the core and filter.

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4/22/09 MF
SPECIFICATIONS SUBJECT
TO CHANGE WITHOUT NOTICE.
RenewAire LLC
Scale: 1" = 24"
Do not scale drawing
HE1.5X-RT_CORNER_WEIGHTS_
MAY18.dwg
HE1.5XRT Corner Weights
RR
RF
LF
UNIT COG
RANGE
BASIC UNIT WEIGHTS (lbs.)
Motors UNIT LF LR RR RF
.75 HP 394 94 81 102 117
ADDITIONAL WEIGHTS FOR OPTIONS (lbs.)
Motors UNIT LF LR RR RF
Double Wall 110 26 23 28 33
VFD'S 82 2 2 2
RA or EA Damper 18 7 7 2 2
OA or FA Damper 18 7 7 2 2
Total Selected Weights
Add the additional weights for options to the Basic Module weights
determined by motor size to determine Module and Corner weights for a
specific unit.
Corner weights shown above include weatherhoods INSIDE THE UNIT, as
shipped.
Center of gravity: A=25" B=16" (+/- 2")
30.37"
Mounting
Leg Pitch
43.46" Mounting Leg Pitch
MAY18- MHK
266.39
186.16
LR
RIGGING
INFORMATION
There are pairs of rigging holes at each upper corner of the unit. Use slings or shackles at all four
corners. Spreader bars are recommended in order to avoid damage to the unit.
CURB
SPECIFICATIONS
F2
INSTALLATION
HE1.5XRT UNIT CORNER WEIGHTS (LBS)
SINGLE-WALL
PHASE UNIT LF LR RR RF
1-PHASE & 3-PHASE 395 94 81 102 117
DOUBLE-WALL
PHASE UNIT LF LR RR RF
1-PHASE & 3-PHASE 504 120 104 130 150
±INDICATES LOCATIONS AT WHICH CORNER WEIGHTS ARE
CALCULATED ALONG CENTERS OF CURB RAILS.
F3
86" Overall
C
L
2 1/2" Control In
C
L
5 5/8" Power In
42 7/8" Lift Lugs
OA
EA
RA
RTF
ONLY
FA
E-Box
Pressure
Ports (4) Typ.
Disconnect
Switch
(2) 7/8" holes for
wiring in bottom of
E-Box
FRONT VIEW
RTH
ONLY
FA
22 1/8" Wiring
3 5/8"
56 3/4"
Overall
5 7/8"
C
L
26 1/8"
Wiring
54"
Case
FA (RTH)
Damper Location
(Optional)
EA Damper
Location
(Optional)
LEFT VIEW
FA (RTH)
18" X 18"
Duct Receiving
Flange
6 3/8"
6"
33 1/4"
Overall
1 7/8"
29 3/4"
Lift Lugs
RIGHT VIEW
RA
18" X 18"
Duct Receiving
Flange
45 3/4" Case
32 5/8"
Case
10 1/8"
11 1/8"
15 3/8"
55 5/8" Minimum
Service Area
24 3/4"
Minimum
Service
Area
FA (RTF)
14" x 16"
Opening
TOP VIEW
Door
Swing
Door
Swing
FA (RTF)
Damper Location
(Optional)
2 1/8"
1 1/8"
17 1/8" I.D. 17 1/8" I.D.
4 1/4"
1 7/8"
38 1/2" I.D.
42 1/4" O.D.
24 1/2"
I.D.
28 1/4"
O.D.
A
A
FA
RA
TOP VIEW
CURB 1.5X
1 7/8"
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
Model: HE1.5X RTH/RTF
Drawing Type: Unit Dimension
Version: MAY18
ABBREVIATIONS
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
FA: Fresh Air to inside
RTF: Rooftop Vertical FA 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.
86" Overall
C
L
2 1/2" Control In
C
L
5 5/8" Power In
42 7/8" Lift Lugs
OA
EA
RA
RTF
ONLY
FA
E-Box
Pressure
Ports (4) Typ.
Disconnect
Switch
(2) 7/8" holes for
wiring in bottom of
E-Box
FRONT VIEW
RTH
ONLY
FA
22 1/8" Wiring
3 5/8"
56 3/4"
Overall
5 7/8"
C
L
26 1/8"
Wiring
54"
Case
FA (RTH)
Damper Location
(Optional)
EA Damper
Location
(Optional)
LEFT VIEW
FA (RTH)
18" X 18"
Duct Receiving
Flange
6 3/8"
6"
33 1/4"
Overall
1 7/8"
29 3/4"
Lift Lugs
RIGHT VIEW
RA
18" X 18"
Duct Receiving
Flange
45 3/4" Case
32 5/8"
Case
10 1/8"
11 1/8"
15 3/8"
55 5/8" Minimum
Service Area
24 3/4"
Minimum
Service
Area
FA (RTF)
14" x 16"
Opening
TOP VIEW
Door
Swing
Door
Swing
FA (RTF)
Damper Location
(Optional)
2 1/8"
1 1/8"
17 1/8" I.D. 17 1/8" I.D.
4 1/4"
1 7/8"
38 1/2" I.D.
42 1/4" O.D.
24 1/2"
I.D.
28 1/4"
O.D.
A
A
FA
RA
TOP VIEW
CURB 1.5X
1 7/8"
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
Model: HE1.5X RTH/RTF
Drawing Type: Unit Dimension
Version: MAY18
ABBREVIATIONS
EA: Exhaust Air to outside
OA: Outside Air intake
RA: Room Air to be exhausted
FA: Fresh Air to inside
RTF: Rooftop Vertical FA 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.

ERV HE1.5XRT
WWW.RENEWAIRE.COM INSTALLATION, OPERATION AND MAINTENANCE MANUAL 1.800.627.449910
INSTALLATION
GENERAL PRACTICES
Take these simple steps to attenuate noise from the unit.
Outside the building:
The intake (OA) hood is the primary source of noise
outside the building. When practical, orient the outake
air hood to point away from houses or public areas.
At the Curb:
Cut the holes in the roof deck to fit closely around
the duct(s) passing through the roof deck. Seal all
gaps around the duct(s) at the roof deck.
Ducts:
Make sure the ductwork at the unit outlets is stiff
enough to resist the flexure and resulting booming
associated with system start-up and shut-off.
In general, provide smooth transitions from the ERV’s
outlets to the duct. The ducts connecting to the
outlets should be straight for a sufficient distance,
with gradual transitions to the final duct size.
These guidelines are consistent with SMACNA
recommended duct layout practices for efficient
and quiet air movement. Follow SMACNA guidelines.
RADIATED NOISE
The HE1.5XRT is insulated with high-density
fiberglass. This provides significant attenuation
of radiated sound from the unit itself.
The RA connector duct can be significant sources
of radiated sound as well. The RA duct should be
insulated for sound control. This insulation should
start at the unit. At a minimum the first 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.
PLANNING
YOUR INSTALLATION
To avoid motor bearing damage
and noisy and/or unbalanced
impellers, keep drywall spray,
construction dust, etc., out of unit.
CAUTION
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 discon-
nect 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 qualified professional(s) in accordance
with all applicable codes, standards and licens-
ing requirements.
4. Any structural alterations necessary for instal-
lation 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 dam-
age to unit or property if high winds move this
unit. Secure this unit to the building!
7. Sufficient air is needed for proper combustion
and exhausting of gases through the flue (chim-
ney) of fuel burning equipment that might be in-
stalled in the area affected by this equipment. If
this unit is exhausting air from a space in which
chimney-vented fuel burning equipment is locat-
ed, take steps to assure that combustion air sup-
ply is not affected. Follow the heating equipment
manufacturer’s requirements and the combus-
tion 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.
RISK OF FIRE, ELECTRIC SHOCK, OR INJURY. OBSERVE ALL CODES AND THE FOLLOWING:
WARNING
SOUND
ATTENUATION

ERVHE1.5XRT
111.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL WWW.RENEWAIRE.COM
FIELD CONVERSIONFIELD CONVERSION OF OPENINGS
The HE1.5-RT is designed to allow field conver-
sion of the Return Air (RA) and Fresh Air (FA) unit
openings. This means the RA motorized impeller
subassembly can be moved to an adjacent side or
base of the unit if that opening is preferred. The
FA outlet opening can also be moved to an adja-
cent wall or base.
Before you start, plan the duct work layout.
Determine which openings are to be converted.
- Turn off the disconnect switch on the unit.
Make sure electrical power is shut off to
the unit and disconnect switch.
- Open the access doors to the unit.
- Remove the core strap, filters, and energy
exchanger cores from the unit.
TO FIELD CONVERT INLET OPENING
1. Disconnect motor harness connector by the
motor. Move the wire harness out of the way if
necessary.
2. Support the impeller subassembly. Remove the
eight ¼-20 bolts retaining the impeller
subassembly plate to the side rails and front
and back tabs.
3. Lift the entire impeller subassembly out of
the unit and set aside. Leave the rails in
the unit.
4. Remove the patch pan from the desired opening.
Note: The RA patch pan may be on the underside
ofthebasepan. Safelyaccesstheundersideofthe
unit to remove the patch pan.
5. Using the exposed sheet metal cutout, cut the
insulation from the desired opening.
6. Seal the edges of the cut insulation to prevent
erosionoftheinsulationedgesandhavingdebrisin
the air stream.
7. Install the patch pan over the undesired opening.
Note: The RA patch pan may be installed on
the underside of the base pan. Safely access the
underside of the unit to install the patch pan.
8. Installtheinsulationintheundesiredopening. Seal
the insulation.
9. At this point, if the Fresh Air (FA) outlet opening
is to be converted, you will want to address it
before proceeding with the RA inlet opening.
10. After converting the FA outlet opening proceed
with the RA inlet opening.
11. Install the impeller subassembly into the new inlet
opening and fasten with eight ¼-20 bolts to retain
to the side rails and front and back tabs. Make
sure the motor harness connector is towards the
front of the unit.
12. Connect the motor harness.
13. Tidy up any wire harnesses that were moved
making sure motor wires are taut and away from
the impeller blades.
TO FIELD CONVERT OUTLET OPENING
1. Remove the patch pan from the desired opening.
Note: The FA patch pan may be on the underside
of the base pan. Safely access the underside of
the unit to remove the patch pan.
2. Using the exposed sheet metal cutout, cut the
insulation from the desired opening.
3. Seal the edges of the cut insulation to prevent
erosion of the insulation edges and having debris
in the air stream.
4. Install the patch pan over the undesired opening.
Note: The FA patch pan may be installed on the
underside of the base pan. Safely access the
underside of the unit to install the patch pan.
5. Install the insulation in the undesired opening.
Seal the insulation.
6. If the RA Inlet Opening is being converted return
to Step 10 in the “To Field Convert Return Air
(RA) Inlet Opening” instructions.
After completion of the field conversion,
- Clean out the interior of the unit to remove any debris.
- Install energy exchanger cores, filters, and core strap.
www.renewaire.com (800) 627- 4499 [email protected]
INSTALLATION

ERV HE1.5XRT
WWW.RENEWAIRE.COM INSTALLATION, OPERATION AND MAINTENANCE MANUAL 1.800.627.449912
inf[email protected]m
INSTALLATION
PLANNING
YOUR INSTALLATION
CONNECTING HORIZONATAL DUCTS TO UNIT
Flanged duct connections are provided on the horizontal duct connections of the HE1.5XRTR,
RTF, and RTH units. These allow for connection of ducts. Please refer to dimension drawings for duct
flange sizes.
INSIDE DUCTWORK SYSTEM
Follow Engineer’s Ductwork Design
Ductwork should be designed by an engineer
to allow the unit to provide the required airflow.
Duct Insulation
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.
Use Dampers to Set and Balance Airflow Rates
In most applications, the airflow rate for both the
Fresh Air and the Exhaust Air should be roughly
equal (or “balanced”) for best performance of the
HE1.5XRT Unit. See unit specification sheet for
CFM/ESP curves for available horsepower motors.
APPLICATIONS
See figure F4 for examples of some common installation approaches.
The unit’s fresh air inlet should be at least 10’ away from any exhaust, such as dryer vents, chimneys,
furnace and water heater exhausts, or other sources of contamination or carbon monoxide. Do not locate the
fresh air inlet where vehicles may be serviced or left idling. Never locate the unit inside a structure.
Danger of damage or severe injury if high winds move this unit. Secure unit to structure. Observe local code
requirements at a minimum.
WARNING
F4Common Installation Approaches
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AHU ERV AHU ERV
ERV
CONDITIONED SPACE

ERVHE1.5XRT
131.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL WWW.RENEWAIRE.COM
INSTALLATION
INSTALLATION INSTRUCTIONS
DUCTING
MOUNTING THE UNIT -
ON ROOF CURBS
The base of the HE1.5XRT is designed for instal-
lation on typical Roof Curbs that come with 1½”
wide wood nailers on the top edge. See figure 3
in Planning Your Installation for appropriate curb
size.
Set HE1.5XRT in place. We recommend bolting
through sides of unit base into the Roof Curb to
secure the unit against high winds.
ON EQUIPMENT RAILS (HE1.5XRTH ONLY)
Review drawing of Roof Curb and specify
Equipment Rail to fit. Before installing HE1.5XRT,
apply roofing and counterflashing to Equipment
Rails as per standard practice.
Set HE1.5XRT in place. We recommend bolting
through sides of unit base into the Equipment
Rails to secure the unit against high winds.
BASIC REQUIREMENTS
Always connect an RA and an FA duct to each
Rooftop unit.
• With Rooftop units, the RA and FA ducts cannot
be interchanged.
• With RTV units, both ducts are inside the
building. In other units, such as the RTR/RTF
and RTH, at least one of the ducts is outside and
must be weatherized.
• Any weatherized duct must be thermally
insulated to prevent condensation on the inside
or outside of the duct. The duct lining must be
vapor-sealed, and the duct exterior must be rain
tight. Duct(s) connected to the bottom of the
HE1.5XRT are generally installed at this time.
Install (2) ducts with HE1.5XRTV, (1) duct with
HE1.5XRTR or RTF.
Drop duct(s) into openings in top of roof curb.
Install appropriate gasket on top of Roof Curb
and edges of ducts.
Tape both inner and outer vapor barriers of insulated
duct to collars on duct adapters. This is critical to
prevent migration of moisture into insulation. Build-
up of moisture can result in failure of the duct system
and/or frost in the insulation. Make sure any tears in
the inner and outer vapor barriers are sealed.
CAUTION
Before bringing power to the unit check unit nameplate
to confirm it matches the voltage and phase of the
power you are supplying. Remember that your field
connections need to be accessible for inspection.
CAUTION
OPTIONAL CURB CLIPS
If the optional curb clip kit is supplied, the clips
must be installed on the curb before installing the
unit. Refer to instructions supplied with the Curb
Clip Kit.
ELECTRICAL SPECIFICATIONS
NOTE: If your unit is equipped with ECM Motors,
please refer to “ECM Motor Manual Supplement”
for more detail.
Electrical Options and Ratings are identified on
the Unit Label (located near electrical box). Find
the complete Unit Model Number in the lower left
corner of the Unit Label.
Do Not Use Variable Speed
Controls
Blower motors in the HE1.5XRT
will be damaged by speed
control devices. Use balancing
dampers in ductwork to set
or control operating air flow
rates. ECM motors or variable
frequency drives are available as
an option for speed control.
CAUTION

ERV HE1.5XRT
WWW.RENEWAIRE.COM INSTALLATION, OPERATION AND MAINTENANCE MANUAL 1.800.627.449914
HE1.5XRT P3 WIRING SCHEMATICS - STANDARD
HE1.5XRT P1 WIRING SCHEMATICS - STANDARD
TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC
T1
L2 T2
L3 T3
L1
FUSES (opt.)
UNIT DISCONNECT
14
35
C
RELAY
LABEL PN 165943_002
GND
1
2
3
4
5
POWER SUPPLY - 60 Hz
SEE UNIT RATING LABEL
FOR PHASE, VOLTAGE,
MCA AND MOPD.
L2 OMITTED WITH SINGLE-PHASE
POWER SUPPLY.
Call for Unit Operation.
Call for Unit Operation.
24VAC OUT
Class II
24VAC
JUMPER
"UNIT CONTROL USING CLASS II 24VAC POWER PROVIDED BY THIS UNIT"
24VAC POWER AVAILABLE AT TERMINALS 1 & 2
INSTALL PROVIDED JUMPER BETWEEN TERMINALS 2 & 3
"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
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
C
A2 A1
CONTACTOR
MOTOR
FA
MOTOR
EA
KEY:
"FA" = Fresh Outside Air Blower
"EA" = Exhaust Air Blower
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC
1
2
3
4
5
DO NOT interconnect this unit's
Class 2 Power Supply with an
External Power Supply.
NOT AVAILABLE IN
EVERY UNIT
DOOR
INTERLOCK
SWITCH
This wire omitted with
single-phase power
supply.
These wires omitted
with single-phase
power supply.
TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC
T1
L2 T2
L3 T3
L1
FUSES (opt.)
UNIT DISCONNECT
LABEL PN 166107_000
GND
1
2
3
4
5
POWER SUPPLY - 60 Hz
SEE UNIT RATING LABEL
FOR PHASE, VOLTAGE,
MCA AND MOPD.
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
C
A2 A1
CONTACTOR
MOTOR
FA
MOTOR
EA
Call for Unit Operation.
Call for Unit Operation.
24VAC OUT
Class II
24VAC
JUMPER
"UNIT CONTROL USING CLASS II 24VAC POWER PROVIDED BY THIS UNIT"
24VAC POWER AVAILABLE AT TERMINALS 1 & 2
INSTALL PROVIDED JUMPER BETWEEN TERMINALS 2 & 3
"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
KEY:
"FA" = Fresh Outside Air Blower
"EA" = Exhaust Air Blower
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC
DO NOT interconnect this unit's
Class 2 Power Supply with an
External Power Supply.
14
35
C
RELAY
DOOR
INTERLOCK
SWITCH
MOTOR THERMAL
PROTECTOR
WIRES
INSTALLATION
WIRING SCHEMATICS
NOTE: Schematics
shown are representative
of standard units. See
Unit Schematic label for
detailed information.

ERVHE1.5XRT
151.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL WWW.RENEWAIRE.COM
INSTALLATION
WIRING SCHEMATICS
HE1.5XRT P3 IBC THREE PHASE UNIT WITH INDEPENDENT BLOWER CONTROL
HE1.5XRT P1 IBC SINGLE PHASE UNIT WITH INDEPENDENT BLOWER CONTROL
TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC
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 24VAC POWER PROVIDED BY THIS UNIT"
24VAC POWER AVAILABLE AT TERMINALS 1 & 2
INSTALL PROVIDED JUMPER BETWEEN TERMINALS 2 & 3
LABEL PN 165947_002
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
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
C
A2 A1
CONTACTOR (FA)
MOTOR
FA
MOTOR
EA
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
C
A2 A1
CONTACTOR (EA)
POWER SUPPLY - 60 Hz
SEE UNIT RATING LABEL
FOR PHASE, VOLTAGE,
MCA AND MOPD.
L2 OMITTED WITH SINGLE-PHASE
POWER SUPPLY.
KEY:
"FA" = Fresh Outside Air Blower
"EA" = Exhaust Air Blower
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC
DO NOT interconnect this unit's
Class 2 Power Supply with an
External Power Supply.
NOT AVAILABLE IN
EVERY UNIT
DOOR
INTERLOCK
SWITCH
This wire omitted with
single-phase power
supply.
These wires omitted
with single-phase
power supply.
TRANSFORMER
with Circuit Breaker
TRANSFORMER
with Circuit Breaker
24VAC
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 24VAC POWER PROVIDED BY THIS UNIT"
24VAC POWER AVAILABLE AT TERMINALS 1 & 2
INSTALL PROVIDED JUMPER BETWEEN TERMINALS 2 & 3
LABEL PN 166110_000
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
POWER SUPPLY - 60 Hz
SEE UNIT RATING LABEL
FOR PHASE, VOLTAGE,
MCA AND MOPD.
KEY:
"FA" = Fresh Outside Air Blower
"EA" = Exhaust Air Blower
FACTORY WIRING HIGH-VOLTAGE
FACTORY WIRING 24VAC
FIELD WIRING HIGH-VOLTAGE
FIELD WIRING 24VAC
DO NOT interconnect this unit's
Class 2 Power Supply with an
External Power Supply.
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
C
A2 A1
CONTACTOR (FA)
MOTOR
FA
24VAC
1L1 2T1
3L2 4T2
5L3 6T3
C
A2 A1
CONTACTOR (EA)
MOTOR
EA
DOOR
INTERLOCK
SWITCH
MOTOR THERMAL
PROTECTOR
WIRES
MOTOR THERMAL
PROTECTOR
WIRES
NOTE: Schematics
shown are representative
of standard units. See
Unit Schematic label for
detailed information.

ERV HE1.5XRT
WWW.RENEWAIRE.COM INSTALLATION, OPERATION AND MAINTENANCE MANUAL 1.800.627.449916
INSTALLATION INSTRUCTION
INSTALLATION
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 break-
er can be reset about fifteen seconds after it trips
by pressing in the button.
Limits of 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.
LOW VOLTAGE CONTROL SYSTEM
This ERV is provided with a Class II 24VAC power
supply system that operates the unit’s contactor(s)
for HE1.5XRT. The ERV’s 24VAC Power Supply can
also be used to power the externally-installed con-
trols 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.
SPECIFICATIONS
•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
1. Connect only to components intended for use with 24VAC power.
2. Do not undersize the low-voltage wires connected to this device. Observe the wire length and gauge
limits indicated in this manual.
3. Do not overload this unit’s 24VAC power supply system. Confirm that the power requirements of devices
you connect to this power supply system do not exceed 8VA in total.
4. 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 specified terminals in order to avoid damaging the unit or external
controls. Connect only CLASS II power to the control terminals of this unit.
5. Unit is not equipped to receive analog signals (such as 1-10vdc or 4-20mA).
6. 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 non-powered contacts operated by
any kind of control system.
CAUTION
If primary-side voltage is 230VAC,
move black primary-side lead from
transformer’s “208V” terminal to
the transformer’s terminal marked
“240V” (“230V” in some units).
Do not move the black primary-
side lead that is connected to the
transformer’s “COM” terminal.
CAUTION
OBSERVE THESE LIMITS TO WIRE LENGTH AND GAUGE
in order to ensure reliable operation of the control system.
Wire Gauge #22 #20 #18 #16 #14 #12
Circuit Length 100’ 150’ 250’ 400’ 700’ 1000’
“Circuit Length” is distance from ERV to Control Device.
WARNING
DANGER OF INJURY
OR DAMAGE.
The motors in this unit must not be
run at an amperage that exceeds
the motor’s rated full load amps.
It is the installer’s responsibility to
measure the operating amperage
of each motor. If the full load amp
rating is exceeded, the amp draw
must be reduced by reducing
airflow with an external damper.
Failure to make this adjustment
may result in unsafe motor
winding temperatures or tripping
of the motor thermal protection.

ERVHE1.5XRT
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INSTALLATION
CONTROL WIRING
SCHEMATICS
NOTE: The simplified 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.
CONTROL WIRING EXAMPLES BY TYPE OF APPLICATION
A. Single 2-wire Control: Use this schematic if the control requires no power to operate and acts like
a simple on/off switch. The control must not supply any power to the ERV unit. Install jumper (provid-
ed) between terminals 2 & 3. Connect the control’s contacts to terminals 1 & 4 to operate the ERV’s
isolation relay.
Control on separate Power Supply, no power present at Control Output:
Wire as shown for the Single 2-wire control.
C. Control System with 2 Non-powered Relay Contacts: ERVs with Independent Blower Control Only:
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 contacts to the appropriate yellow leads: Terminal 4 for
the “FA Blower”, and Terminal 5 for the “EA Blower”.
B. Control Sending 24VAC “On” Signal (from an external power source) to ERV: Make sure jumper
is NOT installed between Terminals 2 & 3. Now you can safely apply 24VAC to the Terminals 3 & 4 to
operate the ERV’s isolation relay.
Be careful if the external control system provides
24VAC power at its control output: make sure
blue and red leads are separately capped and not
connected to any other wires.
CAUTION
AA SWITCH OR NON-POWERED CONTROL
USING UNIT’S 24VAC POWER SUPPLY
CA SWITCH OR NON-POWERED CONTROL
USING UNIT’S 24VAC POWER SUPPLY
B24VAC FROM AN EXTERNAL SOURCE
Make sure the control provides
no voltage or current at its output
terminals.
CAUTION
Supply only 24VAC (not VDC) from
a Class II Power Source.
CAUTION

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CONTROL WIRING
SCHEMATICS
E. 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.
Supply only 24VAC (not VDC) from
a Class II Power Source.
CAUTION
D. Control System Sending two 24VAC “On” Signals (from an external power source): ERVs with
Independent Blower Control Only: Make sure the jumper is NOT installed between Terminals 2 & 3.
Now you can safely 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).
F. Control on separate Power Supply: Use this schematic only if no power is present at the controls
output terminals. Install jumper at terminals 2 & 3. Connect the Control’s Normally Open (N.O.)
contacts to terminals 1 & 4. NOTE: See Wiring Schematics.
G. Control System on separate Power Supply; Independent Blower Control: Use this schematic only
if no power is present at the controls output terminals. Install jumper at terminals 2 & 3. Connect one of
the Control’s (N.O.) contacts to terminals 1 & 4 to operate the ERV’s isolation relay for the Outside Air
(OA) Blower. Connect another of the Control’s (N.O.) contacts to terminals 1 & 5 to operate the isolation
relay for the Exhaust Air (EA) Blower. NOTE: See Wiring Schematics.
H. Control System Operating Isolation Dampers with End Switches: Use Isolation Dampers with elec-
trically separate end switches. The end switches are used to separately control the ERV unit’s Isolation
Relays. Also, specify the ERV with Independent Blower Control. This ensures that each damper is open
before the respective blower starts up. NOTE: Because the ERV’s contact will only be operating once
the Dampers are open, the power draw of the Damper Actuators is allowed to be as much as 35VA
while opening (including power draw of the external control system, if any). However, the power draw
of the fully-opened (stalled) Actuators (and external control system if any) must be less than 8VA.
DTWO EXTERNAL RELAY CONTACTS SUPPLYING
24VAC FROM AN EXTERNAL SOURCE
EAN EXTERNAL CONTROL USING UNITS
24VAC POWER SUPPLY
INSTALLATION

ERVHE1.5XRT
191.800.627.4499 INSTALLATION, OPERATION AND MAINTENANCE MANUAL WWW.RENEWAIRE.COM
INSTALLATION
PRINCIPAL OF OPERATION
The HE1.5XRT has one basic purpose: to exhaust
air from a structure and bring in fresh air from
outside, while transferring heating or cooling
energy from the exhaust air to the fresh air.
The HE1.5XRT is a very simple device, and will
accomplish this purpose as long as the blowers
for both airstreams are able to move air through
the energy-exchange core.
CHECKING THAT UNIT IS OPERATING
Air Flow
Airflow should be occurring in both airstreams.
Sometimes the easiest place to confirm that air
is moving is at the weatherhoods.
If exact airflow is critical, it may be desirable to
permanently install flow measuring stations and
manometers in the ductwork connected to the
unit. These also can be used to determine when
filters should be cleaned or changed.
Use Static Taps in Doors to
Measure Airflow Rates
See “Cross-Core Static Drop” in MEASURING
AIRFLOW table. These may be used to directly
measure airflow in the unit.
Energy Exchange
Precise determination of installed sensible energy
exchange effectiveness requires careful measure-
ment of temperatures and air flows in all four air
streams, and in practice is somewhat difficult.
It is possible to confirm that energy is being
exchanged simply by feeling the ducts. If the Fresh
Air duct from the unit into the room is closer to
room temperature than to the outside temperature,
energy is being recovered.
Operating Controls
A wide variety of control schemes may be selected
by the engineer, installer, or owner to meet the
ventilation needs of the facility. These may include
timer clocks, occupancy sensors, dehumidistats
(for cool-weather operation), carbon dioxide sen-
sors, and others. DDC systems may also control
the unit. Most control schemes will operate the
unit only when needed.
CONTINUOUS OPERATION
Continuous operation is acceptable in virtually all
conditions. Unit will not be damaged by continuous
operation as long as air flow occurs. Blower motors
may overheat if filters become completely blocked
due to lack of maintenance. Motors are thermally
protected. With continuous operation, some external
frosting may occur in very cold weather.
OPERATION IN EXTREME COLD WEATHER
Unit is capable of operating at outside temperatures
down to -10°F, with indoor humidities below 40%,
without any internal frosting. Unit can operate at
more severe conditions occasionally with little or no
impact on its performance. At lower humidities, it
can operate at lower outside temperatures without
freezing the energy-exchange core.
OPERATION
Standard HE1.5XRT with single phase original
equipment motors are NOT suitable for use with
solid state speed control.
Three phase motors are NOT suitable for use with
solid state speed control. If speed control is desired
use the VFD option.
Single phase ECM motors are NOT suitable for use
with solid state speed control. They already have
speed control built into the motor electronics.
Le HE1.5XRT avec moteurs d’équipement d’origine
monophasés ne convient pas pour une utilisation avec
regulateur de vitesse electronique.
Moteurs de trois phase ne convient pas pour utilisation
avec regulateur de vitesse electronique. Si la régulation
de vitesse est souhaité, utiliser l’option VDF.
Moteurs d’une phase de l’ECM ne conviennent pas pour
une utilisation avec regulateur de vitesse electronique.
Ils ont déjà le contrôle de vitesse intégré dans le moteur
électronique.
WARNING

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START-UP
START-UP
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.
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 airflow
measurement. 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 flow measuring is completed.
CROSS CORE STATIC PRESSURE MEASUREMENT INSTRUCTIONS
RTV, RTF
ONLY
FA
FA
RTH, RTR
ONLY
OA
EA
RTV, RTF
ONLY
RA
RTV, RTR
ONLY
RA
Pressure
Taps (4)
The proper operating airflow range
for this model is 375 - 1400 CFM.
CAUTION
F1 MEASURING AIRFLOW
DIFFERENTIAL STATIC ACROSS CORE DSP VS. CFM
HE1.5XRT
DSP .10 0.15 0.20 0.25 0.30 0.35 0.40 0.45 0.5 0.55 0.60 0.65 .7 .75 .8 .85
Fresh Air (FA) CFM 335 450 555 650 745 835 920 1005 1085 1165 1240 1315 1385 1460 1530 -
Room Air (RA) CFM - - - - - 300 380 475 575 685 805 935 1070 1220 1375 1535
NOTE: Pressure drop of clean 2” MERV-8 Filters is included in the Unit Performance Ratings Table.