Greenheck Minivent-450 User manual

Only qualiﬁed personnel should install this system.

Personnel should have a clear understanding of these

instructions and should be aware of general safety

precautions. Improper installation can result in electric

shock, possible injury due to coming in contact with

moving parts, as well as other potential hazards.

Other considerations may be required if high winds

or seismic activity are present. If more information

is needed, contact a licensed professional engineer

before moving forward.

1. Follow all local electrical and safety codes, as well

as the National Electrical Code (NEC), the National

Fire Protection Agency (NFPA), where applicable.

Follow the Canadian Electric Code (CEC) in

Canada.

2. All moving parts must be free to rotate without

striking or rubbing any stationary objects.

3. Unit must be securely and adequately grounded.

4. Do not spin fan wheel faster than maximum

cataloged fan RPM. Adjustments to fan speed

signiﬁcantly affects motor load. If the fan RPM is

changed, the motor current should be checked to

make sure it is not exceeding the motor nameplate

amps.

5. Do not allow the power cable to kink or come in

contact with oil, grease, hot surfaces or chemicals.

Replace cord immediately if damaged.

6. Verify that the power source is compatible with the

equipment.

7. Never open access doors to the unit while it is

running.

General Safety Information

DANGER

Always disconnect power before working on or near

this equipment. Lock and tag the disconnect switch

or breaker to prevent accidental power up.

CAUTION

When servicing the unit, the internal components

may be hot enough to cause pain or injury. Allow

time for cooling before servicing.

CAUTION

Precaution should be taken in explosive

atmospheres.

Energy recovery wheels are certiﬁed by the AHRI Air-to-Air Energy Recovery Ventilation Equipment

Certiﬁcation Program in accordance with AHRI Standard 1060. Actual performance in packaged

equipment may vary.

Certiﬁed Ratings are available in the Certiﬁed Product Directory at www.ahridirectory.org

Installation, Operation and Maintenance Manual

Please read and save these instructions for future reference. Read carefully before attempting to assemble,

install, operate or maintain the product described. Protect yourself and others by observing all safety

information. Failure to comply with instructions could result in personal injury and/or property damage!

Energy Recovery Ventilators • MiniVent

Model MiniVent-450 & 750

Part #459023

Energy Recovery Ventilators

Machined parts coated with rust preventive should

be restored to good condition promptly if signs of

rust occur. Immediately remove the original rust

preventive coating with petroleum solvent and clean

with lint-free cloths. Polish any remaining rust from

surface with crocus cloth or ﬁne emery paper and oil.

Do not destroy the continuity of the surfaces. Wipe

clean thoroughly with Tectyl®506 (Ashland Inc.) or

the equivalent. For hard to reach internal surfaces or

for occasional use, consider using Tectyl®511M Rust

Preventive or WD-40®or the equivalent.

Receiving

Upon receiving the product, check to make sure

all items are accounted for by referencing the bill

of lading to ensure all items were received. Inspect

each crate for shipping damage before accepting

delivery. Notify the carrier if any damage is noticed.

The carrier will make notiﬁcation on the delivery

receipt acknowledging any damage to the product.

All damage should be noted on all the copies of the

bill of lading which is countersigned by the delivering

carrier. A Carrier Inspection Report should be ﬁlled

out by the carrier upon arrival and reported to the

Trafﬁc Department. If damaged upon arrival, ﬁle claim

with carrier. Any physical damage to the unit after

acceptance is not the responsibility of Greenheck Fan

Corporation.

Unpacking

Verify that all required parts and the correct quantity

of each item have been received. If any items are

missing, report shortages to your local representative

to arrange for obtaining missing parts. Sometimes it

is not possible that all items for the unit be shipped

together due to availability of transportation and truck

space. Conﬁrmation of shipment(s) must be limited to

only items on the bill of lading.

Handling

Units are to be rigged and moved by the provided

lifting points or fork lifting points (see page 4). Handle

each piece in such a way as to keep from scratching

or chipping the coating. Damaged ﬁnish may reduce

ability of the unit to resist corrosion.

Storage

Units are protected against damage during shipment.

If the unit cannot be installed and operated

immediately, precautions need to be taken to

prevent deterioration of the unit during storage.

The user assumes responsibility of the unit and

accessories while in storage. The manufacturer will

not be responsible for damage during storage. These

suggestions are provided solely as a convenience to

the user.

Inspection and Maintenance during

Storage

While in storage, inspect units once per month. Keep

a record of inspection and maintenance performed

If moisture or dirt accumulations are found on parts,

the source should be located and eliminated. At each

inspection, rotate all moving components by hand

ten to ﬁfteen revolutions to distribute lubricant on

motor and bearings. If paint deterioration begins,

consideration should be given to touch-up or

repainting. Units with special coatings may require

special techniques for touch-up or repair.

Table of Contents

General Safety Information . . . . . . . . . . . . . . 2

Receiving, Handling, Storage . . . . . . . . . . . . .2

Dimensional Data and Weights . . . . . . . . . . . .3

Service Clearances and Access Panel Locations . . 3

Intake and Discharge Locations . . . . . . . . . . . 4

Installation

Hang Mounting with Hanging Vibration Isolators 4

Base Mounting with Base Vibration Isolators . . .5

Duct Connections . . . . . . . . . . . . . . . . . 5

Electrical Connections . . . . . . . . . . . . . . . . 6

Wiring Schematics

Standard Wiring Schematic . . . . . . . . . . . . 6

MiniVent-450 Motion Sensor . . . . . . . . . . . .6

Independent Fan Control - Variable Speed . . . . 7

Timed Frost Control . . . . . . . . . . . . . . . . 7

Timed Frost Control with Speed Controllers . . . 7

System Start-Up

General . . . . . . . . . . . . . . . . . . . . . . . 8

Energy Wheel . . . . . . . . . . . . . . . . . . . .8

Blower Wheel Rotation . . . . . . . . . . . . . . .8

Fan RPM . . . . . . . . . . . . . . . . . . . . . . 8

Motor . . . . . . . . . . . . . . . . . . . . . . . . 8

Routine Maintenance

General . . . . . . . . . . . . . . . . . . . . . . . 9

Fasteners and Set Screws . . . . . . . . . . . . . 9

Removal of Dust and Dirt . . . . . . . . . . . . . 9

Internal Filters . . . . . . . . . . . . . . . . . . . 9

Energy Wheel Maintenance . . . . . . . . . . 9-10

Unit Documentation Record . . . . . . . . . . . . 10

Troubleshooting . . . . . . . . . . . . . . . . . . . 11

Maintenance Log . . . . . . . . . . . . . .Backcover

Warranty . . . . . . . . . . . . . . . . . . .Backcover

2Energy Recovery Ventilators • MiniVent ®

Dimensional Data and Weights Service Clearances and Access

Panel Locations

Back View

Front View

Exhaust

Discharge

Exhaust

Intake

Energy Wheel

Outdoor Air

Discharge

Exhaust

Discharge

Exhaust

Intake

Outdoor Air

Intake

Outdoor Air

Intake

Outdoor Air

Discharge

Back View

Front View

Back View

Front View

Exhaust

Discharge

Exhaust

Intake

Energy Wheel

Outdoor Air

Discharge

Exhaust

Discharge

Exhaust

Intake

Outdoor Air

Intake

Outdoor Air

Intake

Outdoor Air

Discharge

Back View

Front View

Back View

Front View

Exhaust

Discharge

Exhaust

Intake

Energy Wheel

Outdoor Air

Discharge

Exhaust

Discharge

Exhaust

Intake

Outdoor Air

Intake

Outdoor Air

Intake

Outdoor Air

Discharge

Back View

Front View

MiniVent A B C Weight

(lbs.)

450 40 29 18 150

750 46 36 22 210

All dimensions are in inches.

MiniVent D E F G H J K L M N P Q

450 10 8 12 6 43⁄817⁄8616131⁄81⁄8

750 9 10 18 7 33⁄413⁄451⁄81 51⁄81 33⁄413⁄8

All dimensions are in inches.

Access Panel Locations

1. •Outdoorandexhaustfansandmotor

 •Electricalconnection(115volt)

2. •Energywheelcassette

 •Internallters

Exhaust

Discharge

Exhaust

Intake

Supply

Discharge

Supply

Intake

Cassette

Slides Out

Recommended Service Clearances

The MiniVent requires minimum clearances to perform

routine maintenance, such as ﬁlter replacement,

energy wheel cassette and fan inspection. Fan and

motor assemblies, energy

recovery wheel cassette and

ﬁlter sections are provided

with a service door or panel

for proper component

access.

MiniVent A B

450 25 15

750 31 21

All dimensions are in inches.

Energy Recovery Ventilators • MiniVent

The system design and installation should follow

accepted industry practice, such as described in the

ASHRAE Handbook and SMACNA.

Minimum service clearance should be provided on

the side of the unit for routine service and component

removal should it become necessary.

Before beginning installation see page 3 for detail on

appropriate service clearances.

Hang Mounting with Hanging Vibration

Isolators

• Thehangingisolatorkitincludesfour(4)isolators

and required hardware.

• Thehangermountingbracketsarefactory

mounted.

• Locatethesupportrodsasshowninthedrawing.

• Assembleeachisolatorasshown.

MiniVent A B C

450 377⁄8267⁄820

750 433⁄8327⁄824

All dimensions are in inches.

Installation

Changing the discharge location

Step 1 - remove the metal

cover for optional intake by

unfastening the four sheet

metal screws holding it in

place.

Remove the intake duct

collar by unfastening the

sheet metal screws holding

it in place.

Step 2 - place the duct

collar over the newly

uncovered intake opening.

Fasten the intake duct

collar in place.

Place the metal cover over

the original intake and

fasten into place. Be sure

that the corner angle ﬁts

correctly around the unit

corner.

Intake Cover

Intake Duct

Collar

Intake and Discharge Locations

Intake and discharge locations are shown. Both intake

locations are capable of being ﬁeld relocated to suit

installation needs (see optional locations).

Exhaust Air Discharge

Intake

Intake (optional)

Discharge Intake

Outdoor Air

Electrical and Fan Access Panel

(underside)

Flat Washer

Lock Washer

Nut

Flat Washer

Lock Washer Hanger Bracket

(Factory Mounted)

Isolator

3/8 inch Threaded Rod

(Provided by Others)

Isolator Assembly

4Energy Recovery Ventilators • MiniVent ®

Base Mounting with Base Vibration

Isolation

• Thebaseisolatorskitincludesfour(4)isolators,

four (4) brackets and required hardware.

• Removethehangingbracketsfromeachcornerof

the MiniVent. These brackets are shipped mounted

from the factory. Replace with the base brackets

provided.

• RotatetheMiniVent180degrees,sotheelectrical

and fan component panel is accessible from the

top. The corners, where the brackets are fastened,

are now closest to the mounting surface.

• Assembleandmounttheisolatorsasshowninthe

ﬁgures below.

Note: The hanging and base mounting brackets are

fastened to the same unit corners.

3/8 inch Bolt

Flat Washer

Lock Washe

Isolator

Base Mounting

Bracket

Base Mounting

Bracket

3/8 inch Bolt

Flat Washer

Lock Washe

Isolator

Base Mounting

Bracket

Base Mounting

Bracket

Electrical

and

Fan Access Panel

Duct Connections

Examples of good and poor fan-to-duct connections

are shown below. Airﬂow out of the fan should be

directed straight or curve the same direction as the

fan wheel rotates. Poor duct installation will result in

low airﬂow, loud noise and excessive vibrations.

4x Wheel Diameter

MiniVent

Less

than 4x Wheel Diameter

GOOD

POOR

Recommended Discharge Duct Size and Length

MiniVent ERV

Blower Size

Duct

Size

Straight Duct

Length

450 810 x 8 32

750 10 10 x 10 40

All dimensions are in inches.

Isolator Assembly

Assembled and Mounted Isolator Detail

Energy Recovery Ventilators • MiniVent

Electrical Connections

Before connecting power to the unit, read and

understand the following instructions and wiring

diagrams. Complete wiring diagrams are attached

inside the blower door of the unit.

All wiring should be done in accordance with the

National Electrical Code ANSI/NFPA 70 latest edition

and any local codes that may apply. In Canada, wiring

should be done in accordance with the Canadian

Electrical Code. The equipment must be properly

grounded.

Wiring Schematics

Electrical

Connection

Wheel and Filter Access

Sequence for wiring MiniVent unit:

1. The unit’s nameplate contains the voltage and

total amperage required. The wire supplying

power to the unit should be sized accordingly.

2. The main power line should be connected to the

appropriate leads in the unit.

Power may be routed to the MiniVent through

the opening on the underside of the unit. The

locations for the opening are provided in the

ﬁgure to the right.

3. Refer to the wiring diagrams in this manual or in

the unit for controlling the MiniVent.

Electrical Connection Location

MiniVent A B

450 12.5 22.0

750 15.5 30.0

All dimensions are in inches.

MiniVent-450 Motion Sensor Wiring

Model MBW is a wall mounted passive infrared motion

detector that automatically turns on the MiniVent when

a change in temperature is sensed. The MiniVent will

automatically turn off after the room had been vacant

past the adjustable time delay setting of 1 minute to

20 minutes. The detector must be installed in the line-

of-sight of the subject personnel and requires a 2x4

handy box to be supplied by others.

M3 M2

(GROUND)

115 VOLT INPUT POWER

(NEUTRAL) (HOT)

INTERNAL JUNCTION BOX

(GROUND)

FIELD WIRING

FACTORY WIRING

Standard Wiring Schematic

M3 SUPPLY BLOWER MOTOR

M2 EXHAUST BLOWER MOTOR

M1 ENERGY WHEEL MOTOR

SWITCH BY OTHERS

INTERNAL JUNCTION BOX

FIELD WIRING

FACTORY WIRING

UNIT SHALL BE GROUNDED

IN ACCORDANCE WITH N.E.C.

POWER MUST BE OFF

CAUTION

WHILE SERVICING.

(NEUTRAL)

115 VOLT INPUT POWER

(HOT)

(GROUND)

M1 Energy Wheel Motor

M2 Exhaust Blower Motor

M3 Supply Blower Motor

M1 Energy Wheel Motor

M2 Exhaust Blower Motor

M3 Supply Blower Motor

CAUTION

If any of the original wire must be replaced, the

replacement wire must have a temperature rating of

at least 105ºC.

DANGER

High voltage electrical input is required for this

equipment. This work should be performed by a

qualified electrician.

CAUTION

Unit shall be grounded in accordance with the

National Electrical Code (NEC).

6Energy Recovery Ventilators • MiniVent ®

M1 Energy Wheel Motor

M2 Exhaust Blower Motor

M3 Supply Blower Motor

M1 Energy Wheel Motor

M2 Exhaust Blower Motor

M3 Supply Blower Motor

M1 Energy Wheel Motor

M2 Exhaust Blower Motor

M3 Supply Blower Motor

Independent Fan Control

— Variable Speed

Timed Exhaust Frost Control

with Speed Controllers

INTERNAL JUNCTION BOX

115 VOLT INPUT POWER

(HOT) (NEUTRAL) (GROUND)

CONTROL (FURNISHED)

VARIABLE SPEED

ON OFF

CONTROL (FURNISHED)

VARIABLE SPEED

ON OFF

FIELD WIRING

FACTORY WIRING

TEMPERATURE

TIMER

0.8

1.0

16 A2

0.2

0.6

0.2

0.4

CONTROLLER

0.8

1.0

15B1

0.6

0.4

115 VOLT INPUT POWER

REMOTE PANEL

(HOT)

INTERNAL JUNCTION BOX

(GROUND)

(NEUTRAL)

INTERNAL JUNCTION BOX

115 VOLT INPUT POWER

(HOT) (NEUTRAL) (GROUND)

0.8

1.0

A218

0.4

0.2

0.6

1.0

0.8

A1 15

0.4

0.2

0.6

TEMPERATURE

CONTROLLER

TIMER

SPEED

CONT.

SPEED

REMOTE PANEL

Energy Recovery Ventilators • MiniVent

For proper unit function and safety, follow everything

in this startup procedure in the order presented.

Startup is to be done after electrical connections are

complete.

General

Check all fasteners and set screws for tightness. This

is especially important for bearings and fan wheels

Also, if dampers are not motorized, check that they

open and close without binding.

Check Voltage

Before starting the unit compare the supplied voltage

with the unit’s nameplate voltage and the motor

voltage.

Energy Recovery Wheel

First, follow the instructions on page 9 for pulling the

energy recovery cassette halfway out of the unit.

Air Seals — turn the energy recovery wheel by hand

to verify free operation. Check that the air seals,

located around the outside of the wheel and across

the center (both sides of wheel), are secure and in

good condition.

Air seals which are too tight will prevent proper

rotation of the energy recovery wheel. Recheck the air

seals for tightness. Air seal clearance may be checked

by placing a sheet of paper, like a feeler gauge,

against the wheel face. To adjust the air seals, loosen

all eight seal retaining screws. These screws are

located on the bearing support that spans the length

of the cassette through the wheel center. Tighten the

screws so the air seals tug slightly on the sheet of

paper as the wheel is turned.

Replace cassette into unit, plug in wheel drive, replace

access door and apply power. Observe that the wheel

rotates freely. If wheel does not rotate or is binding,

remove the cassette; instructions provided on page 9.

WARNING

Do not operate energy recovery ventilator without

the filters and birdscreens installed.

They prevent the entry of foreign objects such as

leaves, birds, etc.

Do not remove access panels or other components

while standing on a ladder or other unsteady base.

Access panels and components are heavy and

serious injury may occur.

SPECIAL TOOLS

•Voltmeter

•Inclinemanometerorequivalent

•Tachometer

•Amperagemeter

System Start-Up Check Blower Wheel Rotation

First, hand rotate the blower to ensure that the

wheel is not rubbing against the scroll. If the blower

is rotating in the wrong direction, the unit will move

some air but not

perform properly.

To check the rotation,

open the blower

access panel, which

is labeled either

supply or exhaust,

and run the blower

momentarily to

determine the

rotation.

Air Volume Check and Measurement

Along with the building balance, the unit’s airﬂow (cfm)

should be measured and compared with its rated

air volume. The MiniVent is direct drive, therefore

balancing dampers or speed controls are required for

airﬂow balancing. Air volume measurement must be

conducted with access doors on the unit.

The most accurate way to measure the air volume is

by using the pitot traverse method in the ductwork

away from the blower. Other methods can be used but

should be proven and accurate.

To adjust the air volume, change the fan rpm or the

system static pressure. See Troubleshooting section in

this guide.

With all access panels on the unit, compare measured

amps to the motor nameplate full load amps and

correct if overamping.

Measure Motor Voltage, Amperage and Fan

RPM

All access doors must be installed, run the

measurement leads through the provided electrical

access hole in the bottom access panel of the

MiniVent. Measure and record the input voltage and

motor amperage(s).

To measure the fan rpm, the blower door will need to

be removed. Minimize measurement time because the

motor may overamp with the door removed. Do not

operate units with access doors/panels open as the

motors will overload.

With all access panels on the unit, compare measured

amps to the motor nameplate full load amps and

correct if overamping.

Forward Curved

Airﬂow

Forward Curved

8Energy Recovery Ventilators • MiniVent ®

WARNING

Disconnect all electrical power to the MiniVent prior

to inspection or servicing. Failure to comply with this

safety precaution could result in serious injury or

death.

Improper installation, adjustment, alteration, service

or maintenance can cause property damage,

injury or death. Read the installation, operating,

and maintenance instructions thoroughly before

installing or servicing this equipment.

After the MiniVent has been put into operation, an

annual inspection and maintenance program should

be set-up to preserve reliability and performance.

Include the following items in this program:

 •General

 •Fastenersandsetscrews

 •Removalofdustanddirt

 •Filtermaintenance

 •Energywheelcassette

General

The MiniVent energy recovery ventilator requires

very little maintenance. However, small problems

left unchecked, over time, could lead to loss of

performance or early motor failure. We recommend

that the unit be inspected once or twice a year.

The motor should be checked for lubrication at this

time. Lubricate only those motors which have an oil

hole provided. A few drops of all-purpose oil (SAE 20)

will be sufﬁcient.

Fasteners and Set Screws

Any fan vibration has a tendency to loosen

mechanical fasteners. A periodic inspection should

include checking all fasteners and set screws for

tightness. Particular attention should be paid to set

screws attaching the fan wheel to the shaft and the

shaft to the bearings. Loose bearing set screws will

lead to premature failure of the fan shaft.

Removal of Dust and Dirt

The fan motor and wheel(s) should be checked for

dust and dirt accumulation. Dirt buildup clogs cooling

openings on the motor housing and causes motor

overheating. Dirt buildup can contaminate bearing

lubricant and collect on fan wheel blades causing loss

of performance or premature failure. Cleaning can be

accomplished by brushing off any dust that may have

accumulated. Under no circumstances should motors

or bearings be sprayed with steam or water. Even

ﬁltered units can accumulate build up and should be

checked when cleaning ﬁlters.

Maintenance to these components is achieved

through the provided access panels.

Routine Maintenance Internal Filter Maintenance

Opening the

access panels

labeled “Filter

Access” provides

access to the

oneinch deep,

pleated 30% efﬁcient ﬁlters. These ﬁlters should be

checked regularly and cleaned or replaced as needed.

Energy Wheel Maintenance

Annual inspection of the

energy recovery wheel is

recommended. MiniVent units

ventilating smoking lounges

and other non-clean air

spaces should have energy

recovery wheel inspections

more often based upon need.

Accessing the Energy Recovery Wheel

Disconnect power to the MiniVent. Remove access

panel labeled “Energy Wheel Cassette Access”.

Unplug the wheel drive motor. Pull the cassette

halfway out as shown.

Removing the Energy Recovery Wheel

First, remove the drive belt and the collars on both

bearings. On the pulley side of the cassette remove

the four (4) fasteners that hold the bearing support

channel in place. Once the bearing support is

removed the wheel can be pulled from the cassette.

To replace the wheel reverse this procedure.

Recommended Cleaning Procedure for Energy

Recovery Wheels

First, remove the energy recovery wheel by following

the instructions on this page.

Wash the segments or small wheels with a non-acid

based (evaporator) coil cleaner or alkaline detergent

solution, such as 409™ or Fantastik™. Non-acid

based coil cleaner such as KMP Acti-Clean AK-1

concentrate in a 5% solution has been demonstrated

to provide excellent results. Do not use acid based

cleaners, aromatic solvents, temperatures in excess

of 140ºF or steam; damage to the wheel may result.

Soak in the cleaning solution until dirt, grease, and/

or tar deposits are loosened. Internal heat exchange

surfaces may be examined by separating the polymer

strips by hand.

Note: Some staining of the desiccant may remain and

is not harmful to performance.

After soaking, rinse the dirty solution from the wheel

until the water runs clear. Allow excess water to drain

from the media prior to reinstalling the wheel in the

cassette. A small amount of water remaining in the

wheel will be dried out by the airﬂow.

MiniVent Internal

Filter Size Quantity

450 14 x 20 2

750 16 x 20 2

Energy Recovery Ventilators • MiniVent

Frequency of Energy Wheel Cleaning

A regular cleaning cycle must be established for the

energy recovery wheel in order to maintain optimum

sensible and latent energy transfer. In reasonably

clean environments such as schools, ofﬁces or retail

stores, the energy recovery wheel should be inspected

annually and cleaned as needed.

For applications experiencing unusually high levels of

tobacco smoke, such as lounges, nightclubs, bars and

restaurants, washing of the energy recovery wheel

every three months may be necessary to maintain

latent energy (water vapor) transfer efﬁciency.

Failure to follow a regular cleaning cycle for the

energy recovery wheel can result in signiﬁcant energy

transfer performance losses.

Energy Recovery Wheel Belt Drive

Drive belt(s) should be inspected annually. Normal

operation eventually causes stretching or wear on

the belt(s). Once this occurs the belt(s) should be

replaced.

Replacement or spare energy wheel drive belt kits

are available and ship with their own instructions.

The serial number and date code of the energy wheel

cassette are required to obtain the proper replacement

belt kit from the factory. The energy wheel serial

number and date code are located on a label above

the drive pulley on the energy wheel cassette.

Wheel Nameplate Information

Model: ______________________________

Volts: ___________ Hertz: _______ Phase:___

Wheel Serial Number: ____________________

Manufacture Date Code: __________________

Field Start-Up Documentation

Energy Wheel

Rotates freely oYes

oNo, check items below.

Air seal tightness oAcceptable

oAdjusted as on page 8

Belt runs smoothly oYes

oAdjusted

Unit Documentation Record

Job Name:________________________________________

Address: _________________________________________

City: ________________ State: ________ Zip: __________

Phone: __________________ Fax: ____________________

Contact Person:___________________________________

Service Organization: ______________________________

Address: _________________________________________

City: ________________ State: ________ Zip: __________

Phone: __________________ Fax: ____________________

Work Done By:____________________________________

Field Start-Up Documentation

Actual Voltage:_______ Hertz:_______ Phase: _____

Actual Amperage: _________________________________

Supply Blower

Rotation oCorrect

Air Volume Design __________ cfm

Actual __________ cfm

Exhaust Blower

Rotation oCorrect

Air Volume Design __________ cfm

Actual __________ cfm

Supply Motor Voltage: _____________________________

Supply Motor Amperage: __________________________

Supply Fan rpm: __________________________________

Exhaust Motor Voltage: ____________________________

Exhaust Motor Amperage: _________________________

Exhaust Fan rpm: _________________________________

Nameplate Information

Model: ___________________________________________

Volts: ___________ Hertz: __________ Phase: _________

Min. Circuit Amps: _____________ Mark: _____________

Supply Hp: _____________ Exhaust Hp: ______________

Unit Serial Number:________________________________

10 Energy Recovery Ventilators • MiniVent ®

Symptom Possible Cause Corrective Action

Unit is NOT

operating

Electrical

Check fuses/circuit breakers, replace if needed.

Check for On/Off switches. Check for correct supply

voltage.

Motor Check motor horsepower is correct and not tripping

overloads.

Excessive noise

Fan wheel rubbing on inlet Adjust wheel and/or inlet cone. Tighten wheel hub or

bearing collars on shaft.

Bearings Replace defective bearing(s). Lubricate bearings.

Tighten collars and fasteners.

Wheel out of balance Clean, replace or rebalance.

Low airﬂow (cfm)

Fan speed too low Check for correct rpms with catalog data.

Fan wheels are operating

backwards Refer to Fan Wheel Rotation on page 8.

Dirty ﬁlters or energy wheel Replace ﬁlters and/or follow the cleaning procedure

on pages 9 and 10.

High static pressure Incorrect fan-to-duct connections. Make sure

dampers open appropriately. Increase fan speed

High airﬂow (cfm)

Fan speed too high Check for correct fan rpm.

Low static pressure Make sure grilles, ﬁlters and access doors are

installed. Decrease fan speed.

Energy wheel does

NOT turn

Air seals too tight Refer to Energy Recovery Wheel, Air Seals on page 8.

No power to wheel motor Make sure wheel drive is plugged in/connected. Verify

power is available.

Wheel drive belt Check for loose or broken belts. Replace belts;

consult factory.

Energy wheel runs

intermittently

Wheel motor overloads are

tripping due to rubbing between

wheel and air seals.

Recheck air seals, make sure they are not too tight.

See Energy Recovery Wheel, Air Seals on page 8.

Always provide the unit model and serial number when requesting parts or service information. Always check

motor amps and compare to nameplate rating.

Troubleshooting

Energy Recovery Ventilators • MiniVent