RenewAire HE4XRT Manuel utilisateur

134775_005 HE4XRTMan_Jan12.indd Revised 01/2012 www.renewaire.com Page 1

4510 Helgesen Drive, Madison, WI 53718

(608) 221-4499, (800) 627-4499, Fax: (608) 221-2824

[email protected] www.renewaire.com

INSTALLATION AND OPERATION MANUAL

HE4XRT

RISK OF FIRE, ELECTRIC SHOCK, OR INJURY.

OBSERVE ALL CODES AND THE FOLLOWING:

1. Before servicing or cleaning the unit, switch power

off at disconnect switch or service panel and lock-

out/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.

To avoid motor bearing damage and noisy and/or

unbalanced impellers, keep drywall spray, construction

dust, etc., out of unit.

NOTE: Disconnect Switch and 24V Transformer Standard

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.

In 2012, these ERVs may be ordered with new factory-

installed features including Isolation Dampers and Variable

Frequency Drives. Consult the supplemental Installation

and Operation Manual(s) for these features if supplied.

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Placement of the HE4XRT

The HE4XRT 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.

The fresh air inlet 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.

Provide service access to the unit to allow for cleaning the core

and lter.

The HE4XRT is available from the factory in four different

congurations to meet different connection requirements:

Mounting the HE4XRT

On Roof Curbs:

The base of the HE4XRT Unit is designed for installation on our

optional Roof Curb. See drawing below.

Before installing HE4XRT, apply roong and counterashing to

Roof Curb as per standard practice.

Install appropriate gasket on top of Roof Curb.

Set HE4XRT in place. We recommend bolting through sides of unit

base into the Roof Curb to secure the unit against high winds.

On Equipment Rails:

Review drawing of Roof Curb and specify Equipment Rail to t.

Before installing HE4XRT, apply roong and counterashing to

Equipment Rails as per standard practice.

Set HE4XRT in place. We recommend bolting through sides of unit

base into the Equipment Rails to secure the unit against high winds.

Option Code Description of

Duct Connection Conguration Mounting Option

HE4XRTV Room Air [RA] enters bottom of unit.

Fresh Air [FA] exits bottom of unit. Roof Curb

HE4XRTR Room Air [RA] enters bottom of unit.

Fresh Air [FA] exits side of unit. Roof Curb

HE4XRTF Room Air [RA] enters side of unit.

Fresh Air [FA] exits bottom of unit. Roof Curb

HE4XRTH Room Air [RA] enters side of unit.

Fresh Air [FA] exits side of unit. Equipment Rail

HE4XRTV

(“Standard” Conguration)

RA = Room Air into Unit

OA = Outside Air into Unit

FA = Fresh Air to Inside

EA = Exhaust Air to Outside

HE4XRTR

HE4XRTF

HE4XRTH

Service Area

48 1

76 3

8"39 1

117 3

50 3

14 3

4" 13 1

34"

25.94 54 1

91"

72 5

HE4XRT

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.

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Connecting Ducts to Unit

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 ducts to be insulated on the inside

or the outside.

Option Code Room Air [RA] Inlet

INNER [OUTER]

Fresh Air [FA] Outlet

INNER [OUTER]

HE4XRTV 11” x 46” (on bottom)

[13” x 48”]

12” x 32” (on bottom)

[14” x 34”]

HE4XRTR 11” x 46” (on bottom)

[13” x 48”]

12” x 32” (on side)

[14” x 34”]

HE4XRTF 12” x 40” (on side)

[14” x 42”]

12” x 32” (on bottom)

[14” x 34”]

HE4XRTH 12” x 40” (on side)

[14” x 42”]

12” x 32” (on side)

[14” x 34”]

Operation

Principal of Operation

The HE4XRT 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 HE4XRT 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

Airow should be occurring in both airstreams. Sometimes

the easiest place to conrm that air is moving is at the

weatherhoods.

If exact airow is critical, it may be desirable to permanently

install ow measuring stations and manometers in the ductwork

connected to the unit. These also can be used to determine when

lters should be cleaned or changed.

Use Static Taps in Doors to Measure Airow Rates

See “Cross-Core Static Drop” in MEASURING AIRFLOW table. These

may be used to directly measure airow in the unit.

Energy Exchange

Precise determination of installed sensible energy exchange

effectiveness requires careful measurement of temperatures

and air ows in all four air streams, and in practice is somewhat

difcult.

It is possible to conrm 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

sensors, 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 ow occurs. Blower motors may overheat if lters become

completely blocked due to lack of maintenance. Motors are

thermally protected. With continuous operation, some external

frosting may occur in very cold weather (see below).

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.

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Inside Ductwork System

Follow Engineer’s Ductwork Design

Ductwork should be designed by an engineer to allow the unit to

provide the required airow.

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 Static Taps in Doors to Measure Airow Rates

See “Cross-Core Static Drop” in MEASURING AIRFLOW table. These

may be used to directly measure airow in the unit.

Change Sheaves if required to Set and Balance Air Flow

In most applications, the airow rate for both the Fresh Air and

the Exhaust Air should be roughly equal (or “balanced”) for best

performance of the HE4XRT Unit.

In most cases, the job engineer will specify ow rates and ESP

requirements. The blower motors will also be specied to provide

the required performance.

See unit specication sheet for CFM/ESP curves for available

horsepower motors.

See drawings below for examples of some common installation

approaches:

Sound Attenuation

General Practices

Take these simple steps to attenuate noise from the unit.

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.

Ducts:

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 HE4XRT 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.

Aerodynamic (Velocity) Noise

When sound attenuation is a design concern, the primary

consideration is velocity noise at the unit’s Fresh Air blower

outlet. The average velocity at the Fresh Air blower outlet is

1230 FPM when the unit is operating at 4290 CFM. The average

velocity at the Exhaust Hood outlet is 1420 FPM when the unit is

operating at 4290 CFM.

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.

Electrical Specications

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.

HE-4X_RTV

ROOF

Unit connected to

Return Duct of

nearby AHU.

HE-4X_RTR

Rooftop AHU

ROOF

RTR Unit with dedicated ducts

collecting Room Air.

Fresh Air is ducted into

horizontal return connection

of adjacent AHU.

HE-4X_RTV

ROOF

Stand-alone installation with

independent ducts for

exhaust and supply air.

AHU

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HE4XRT Conguration Chart

6 CORE: "J" = G5

11WALL TYPE: "S" = SINGLE, "D" = DOUBLE

12PHASE: "1" = SINGLE-PHASE, "3" = THREE-PHASE

OPTION 1: 24V TRANSFORMER

25 SAFETY LISTING (RESTRICTION 15)

MODEL

NUMBER

MULTIPLE-CHOICE OR

OPTIONAL FEATURES

STANDARD

FEATURES

9BASE TYPE

"V", "H", "R", "F"

10 UNUSED IN HE-4X MODELS

13VOLTAGE: (SEE RESTRICTIONS 2, 3 & 6)

7-8 INDOOR/OUTDOOR: "RT" = ROOFTOP

1-5 MODEL: "HE-4X"

16-17 UNUSED IN HE-4X MODELS

"1" = 115V, "4" = 460V, "5" = 208-230V, "8" = 575V

"L" = LISTED "N" = NON-LISTED

OPTION 4: OTHERS

"T" = TR (TRANSFORMER WITH ISOLATION RELAY)

"-" = NONE,

"W" = WHITE PAINT, "C" = CUSTOM PAINT

"X" = CUSTOM UNIT

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

DISCONNECT

"N" = NON-FUSED (STANDARD)

"F" = FUSED

OPTION 2: FILTER MONITOR

"-" = NONE,

"F" = FILTER MONITOR BOTH AIRSTREAMS

J - - - T

H E - 4 X R T

15EA HORSEPOWER14 FA HORSEPOWER

"V" = 2HP

"W"= 3HP

"X" = 5HP

RESTRICTION 6

19 UNIT CONTROL

"A" = STANDARD UNIT CONTROL WIRING

"V" = ONBOARD VFD BOTH AIRSTREAMS

"F" = ONBOARD VFD FA AIRSTREAM

"E" = ONBOARD VFD EA AIRSTREAM

DAMPERS

"-" = NO DAMPERS (STANDARD)

"D" = DAMPERS BOTH AIRSTREAMS

"E" = DAMPER EA AIRSTREAM

"F" = DAMPER FA/OA AIRSTREAM

23 OTHER OPTIONS (RESERVED)

"-" = NONE

RESTRICTIONS:

1: -

2: VOLTAGE CODE "1" AVAILABLE WITH PHASE CODE

"1" (SINGLE-PHASE) ONLY.

3: VOLTAGE CODES "4" & "8" AVAILABLE WITH PHASE

CODE "3" (THREE-PHASE) ONLY.

4:-

5:-

6: VOLTAGE CODES "1" AVAILABLE ONLY WITH FA/EA

HORSEPOWER CODE "V".

7: -

8:-

9:-

10:-

11:-

12: -

13:-

14: -

15: SOME UNITS WITH CUSTOM "X" CODE, HE6X &

HE8X UNITS ARE NOT SAFETY LISTED.

HE4XRT Dimensions

5 5/8" Power In

2 1/2" Control In

55 1/4" Lifting Lugs

57"

93 7/8" Overall

Pressure

Taps (4)

FRONT VIEW

(2) Ø7/8" holes

for wiring in

bottom of E-box

RTH, RTF

ONLY

FA RA

RTV, RTR

ONLY

RTV, RTF

ONLY

RTH, RTR

ONLY

Disconnect

Switch

79 3/4" Lifting Lugs

4" Top of Curb

80"

20"

82" Overall

RIGHT VIEW

OA Inlet

Damper

Location

(Optional)

12" X 40"

RA Inlet

(RTH, RTF)

75 7/8" Control &

Power Wire Inlet

40 1/4"

5 1/2"

38 3/4"

12"

LEFT VIEW

E-box

EA Outlet

12" X 32"

Damper

Location

(Optional)

12" X 32"

FA Outlet

(RTH, RTR)

17 3/4" 18 5/8"

117 1/4"

Service

Area

14 3/4"

12 1/8"

40 1/8"

Curb Center

68" Service Area

28 3/4" Curb Center

82"

Unit

(RTV, RTR Only)

11" X 46"

(RTV, RTF Only)

12" X 32" TOP VIEW

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HE4XRT P1 Wiring Schematics with Independent Blower Control

24VAC

MOTOR

(OA)

POWER SUPPLY

1 PHASE 60Hz

SEE UNIT RATING LABEL

FOR VOLTAGE, MCA

AND MOPD

Call for OA Blower Operation.

OPTIONS INSTALLED: INDEPENDENT BLOWER CONTROL

GND

Call for EA Blower Operation.

RELAY

TRANSFORMER AND

CIRCUIT BREAKER

DISCONNECT

SWITCH

MOTOR STARTER

FUSE

(IF INSTALLED AT FACTORY)

JUMPER PROVIDED

MOTOR

(EA)

FACTORY SETTINGS:

Overload Relay Trip Settings = Motor Nameplate FLA

Overload Relay Mode Settings:"Manual" position

KEY:

"OA" = Outside Air Blower

"EA" = Exhaust Air Blower

FACTORY WIRING HIGH-VOLTAGE

FACTORY WIRING 24VAC

FIELD WIRING

Call for OA Blower Operation.

Call for EA Blower Operation.

OUT 24VAC

Class II

24VAC

"UNIT CONTROL USING CLASS II 24VACPOWER 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

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HE4XRT P3 Wiring Schematics with Independent Blower Control

24VAC

MOTOR

(OA)

MOTOR

(EA)

POWER SUPPLY

3 PHASE 60Hz

SEE UNIT RATING LABEL

FOR VOLTAGE, MCA

AND MOPD

Call for OA Blower Operation.

OPTIONS INSTALLED: INDEPENDENT BLOWER CONTROL

GND

Call for EA Blower Operation.

RELAY

Call for OA Blower Operation.

Call for EA Blower Operation.

OUT 24VAC

Class II

RELAY

TRANSFORMER AND

CIRCUIT BREAKER

DISCONNECT

SWITCH MOTOR STARTER

MOTOR STARTER

FUSE

(IF INSTALLED AT FACTORY)

24VAC

JUMPER PROVIDED

FACTORY SETTINGS:

Overload Relay Trip Settings = Motor Nameplate FLA

Overload Relay Mode Settings:"Manual" position

KEY:

"OA" = Outside Air Blower

"EA" = Exhaust Air Blower

FACTORY WIRING HIGH-VOLTAGE

FACTORY WIRING 24VAC

FIELD WIRING

"UNIT CONTROL USING CLASS II 24VACPOWER 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

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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.

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.

NOTE: INSTALLING CONTRACTOR:

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.

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 steady-

state load does not exceed 8VA.

This ERV is provided with a Class II 24VAC power supply system that

operates the unit’s contactor(s) for EV450 and HE1X. The ERV’s

24VAC Power Supply can also be used to power the externally-

installed controls system: up to 8VA of power is available.

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).

Abuilt-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.

24VAC Power Supply

Provided with this ERV Unit

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.

Conrm 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 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.

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.

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

Motor Starters

This unit uses IEC-style motor starters to protect the motors

against overload.

IEC-style motor starters use Overload Relays to detect excessive

current and interrupt the control circuit that engages the motor’s

contactors.

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.

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 and

overload relays on the motor starters must be set at

or below motor full load amps. For safest operation,

the overload relays should also be used in hand reset

mode with trip test capability.

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

substituting a smaller motor pulley or by adjusting

the variable sheave. Continue these adjustments

until the actual amperage is no more than the motor’s

faceplate full load amps.

Failure to make this adjustment may result in

unsafe motor winding temperatures or tripping of

the supplied motor starter’s overload relay motor

protection devices set at full load amps.

DANGER OF INJURY OR DAMAGE.

The relay must be set for correct FLA rating depending

on the motor horsepower. See Unit Rating Label on

motor for HP and FLA specications.

Adhere to applicable local codes when adjusting the

dial setting of the overload relays.

The Overload Relay output contacts 95 & 96 must

remain in series with the low-voltage control circuit!

Altering this will create a hazardous situation in

which the motor is not protected against overload!

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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.

Control Wiring Schematics

NOTE: The simplied schematics below show only the relevant

portions of the low-voltage control circuit in the ERV unit and

representational external control approaches. See the

complete unit schematics elsewhere in this manual.

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.

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.

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).

Make sure the control provides no voltage or current at its

output terminals.

Supply only 24VAC (not VDC) from a Class II Power Source.

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.

Supply only 24VAC (not VDC) from a Class II Power Source.

G. Control System Operating Isolation Dampers with End

Switches: Use Isolation Dampers with electrically separate

end switches. The end switches are used to separately

control the ERV unit’s Isolation Relays. This ensures that

each damper is open before the respective blower starts up.

NOTE: Because the ERV’s Motor Starters 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. (Most damper

actuators have much lower power draws.)

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).

MPU

Connect Terminals 2 & 3

Connect Switch between Terminals 1 & 4

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

24VAC FROM AN EXTERNAL SOURCE

Unit's 24VAC

Power Supply

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

AN EXTERNAL CONTROL USING UNIT'S

24VAC POWER SUPPLY

24VAC Available at Terminals 1 & 2

Unit's 24VAC

Power Supply

Unit's 24VAC

Power Supply

Connect Terminals 2 & 3

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

TWO EXTERNAL RELAY CONTACTS

SUPPLYING 24VAC FROM AN

EXTERNAL SOURCE Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

Connect Terminals 4 & 5

Connect Switch between Terminals 1 & 4

Connect Terminals 4 & 5

Connect Terminals 2 & 3

MPU

Connect Terminals 2 & 3

Connect Switch between Terminals 1 & 4

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

24VAC FROM AN EXTERNAL SOURCE

Unit's 24VAC

Power Supply

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

AN EXTERNAL CONTROL USING UNIT'S

24VAC POWER SUPPLY

24VAC Available at Terminals 1 & 2

Unit's 24VAC

Power Supply

Unit's 24VAC

Power Supply

Connect Terminals 2 & 3

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

TWO EXTERNAL RELAY CONTACTS

SUPPLYING 24VAC FROM AN

EXTERNAL SOURCE Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

Connect Terminals 4 & 5

Connect Switch between Terminals 1 & 4

Connect Terminals 4 & 5

Connect Terminals 2 & 3

MPU

Connect Terminals 2 & 3

Connect Switch between Terminals 1 & 4

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

24VAC FROM AN EXTERNAL SOURCE

Unit's 24VAC

Power Supply

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

AN EXTERNAL CONTROL USING UNIT'S

24VAC POWER SUPPLY

24VAC Available at Terminals 1 & 2

Unit's 24VAC

Power Supply

Unit's 24VAC

Power Supply

Connect Terminals 2 & 3

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

TWO EXTERNAL RELAY CONTACTS

SUPPLYING 24VAC FROM AN

EXTERNAL SOURCE Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

Connect Terminals 4 & 5

Connect Switch between Terminals 1 & 4

Connect Terminals 4 & 5

Connect Terminals 2 & 3

MPU

Connect Terminals 2 & 3

Connect Switch between Terminals 1 & 4

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

24VAC FROM AN EXTERNAL SOURCE

Unit's 24VAC

Power Supply

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

AN EXTERNAL CONTROL USING UNIT'S

24VAC POWER SUPPLY

24VAC Available at Terminals 1 & 2

Unit's 24VAC

Power Supply

Unit's 24VAC

Power Supply

Connect Terminals 2 & 3

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

TWO EXTERNAL RELAY CONTACTS

SUPPLYING 24VAC FROM AN

EXTERNAL SOURCE Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

Connect Terminals 4 & 5

Connect Switch between Terminals 1 & 4

Connect Terminals 4 & 5

Connect Terminals 2 & 3

MPU

Connect Terminals 2 & 3

Connect Switch between Terminals 1 & 4

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

24VAC FROM AN EXTERNAL SOURCE

Unit's 24VAC

Power Supply

UNIT INTERNAL CONTROL WIRING

(SIMPLIFIED)

AN EXTERNAL CONTROL USING UNIT'S

24VAC POWER SUPPLY

24VAC Available at Terminals 1 & 2

Unit's 24VAC

Power Supply

Unit's 24VAC

Power Supply

Connect Terminals 2 & 3

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

A SWITCH OR NON-POWERED

CONTROL USING UNIT'S 24VAC POWER

SUPPLY Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

UNIT INTERNAL CONTROL WIRING

CIsolation Relay Coil (Fresh Air)

(SIMPLIFIED)

TWO EXTERNAL RELAY CONTACTS

SUPPLYING 24VAC FROM AN

EXTERNAL SOURCE Unit's 24VAC

Power Supply

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

CIsolation Relay Coil (Fresh Air)

CIsolation Relay Coil (Exhaust Air)

Connect Terminals 4 & 5

Connect Switch between Terminals 1 & 4

Connect Terminals 4 & 5

Connect Terminals 2 & 3

134775_005 HE4XRTMan_Jan12.indd Revised 01/2012 www.renewaire.com Page 10

HE4XRT Airow Performance

Motor

Blower

RPM

Turns

Open

External Static Pressure (in. w.g.)

0.00 0.25 0.50 0.75 1.00 1.25 1.50

SCFM BHP SCFM BHP SCFM BHP SCFM BHP SCFM BHP SCFM BHP SCFM BHP

1186 4 3099 1.5 2790 1.3 2295 1.1 1790 0.8 1150 0.6

1326 2 3465 2.2 3185 1.9 2810 1.7 2335 1.4 1885 1.2 1290 0.9

1466 0 2451 1.8 2026 1.5 1485 1.2

3 (a)

1455 4 3812 2.7 3550 2.5 3285 2.3 2820 2.0 2400 1.7 1970 1.5 1450 1.2

1527 3 3750 2.9 3500 2.7 3085 2.4 2676 2.1 2300 1.9 1815 1.5

1598 2 3350 2.6 2950 2.6 2590 2.3 2175 2.0

1670 1 3210 3.0 2870 2.7 2500 2.4

1742 0 2800 2.9

5 (b)

1623 4 4165 3.7 3965 3.5 3750 3.3 3475 3.0 3055 2.5 2685 2.3 2290 2.0

1728 2 4240 4.3 4050 4.0 3820 3.7 3450 3.3 3050 3.0 2720 2.6

1832 0 4345 4.9 4140 4.5 3850 4.2 3490 3.7 3145 3.3

(a) Sheaves for 3HP motors can be adjusted from 1742 RPMs at 0 turns to 1419 RPM at 4.5 turns. Operating range shown is best for motor efciency.

(b) Sheaves for 5HP motors can be adjusted from 1832 RPMs at 0 turns to 1493 RPM at 6.5 turns. Operating range shown is best for motor efciency.

HE4XRT Replacement Parts

ACORES

BFILTERS

CBLOWER DOOR

DTURN LATCH

EDISCONNECT SWITCH

FTRANSFORMER

GISOLATION RELAY

HOVERLOAD RELAY

JCONTACTOR

K CORE DOOR

LMOTOR

MMOTOR MOUNT

NBLOWER

PMOTOR SHEAVE

RBELT

S BLOWER SHEAVE

T INTAKE HOOD

UEXHAUST HOOD

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