INSTALLATION INSTRUCTIONS ENERGY RECOVERY … · Modification Code Energy Recovery Ventilator...

MODELS:WGERV-A3

WGERV-A3AWGERV-C3WGERV-A5

WGERV-A5AWGERV-C5

ENERGY RECOVERY VENTILATOR WITH EXHAUST

BARD MANUFACTURING COMPANYBryan, Ohio 43506

Since 1914...Moving ahead, just as planned.

Manual: 2100-364GSupersedes: 2100-364FFile: Volume III, Tab 19Date: 04-05-05

INSTALLATION INSTRUCTIONS

CONTENTS

COPYRIGHT APRIL 2004BARD MANUFACTURING COMPANY

BRYAN, OHIO USA 43506

Manufactured under the following U.S. patent numbers:5,485,878; 5,0023,116; 4,924,934;

4,875,520; 4,825,936

Figures

Figure 1 Intake Hood Assembly ............................. 5

Figure 2 Remove Vent Option Door ...................... 6

Figure 3 Filter & Exhaust Plate Location ............... 7

Figure 4 Installation of Exhaust Blower Assembly . 8

Figure 5 Installation of WGERV ............................ 9

Figure 6 WGERV Assembly ................................ 10

Figure 7 Wiring - 230 Volt ..................................... 11

Figure 8 Wiring - 460 Volt .................................... 12

Figure 9 Installation of Fresh Air IntakeHood Assembly ..................................... 13

Figure 10 Operation of Unit with WGERV ............. 14Figure 11 Thermostat Wiring ................................. 18Figure 12 Gas Electric Connection Diagram ......... 19Figure 13 Hub Assembly with Ball Bearings .......... 20

Tables

Table 1 Ventilation Air (CFM) .............................. 16

Model Nomenclature Legend ..................................... 1

Electrical Specifications ............................................. 1

General Description ................................................... 1

General Information ................................................... 1

Unpacking .................................................................. 1

Performance and Application Data - WGERV-*3 ....... 2

Performance and Application Data - WGERV-*5 ....... 3

Basic Installation (Field Installation) .................... 4 & 5

Basic Installation (Factory Installed Versions) .......... 15

Control Wiring .......................................................... 15

Control Requirements .............................................. 15

Recommended Control Sequences ......................... 15

Ventilation Air Flow ................................................... 15

Energy Recovery Ventilator Maintenance ................ 16

Maintenance Procedures ......................................... 16

Quarterly & Annual Maintenance ............................. 17

Wiring Diagrams ................................................. 21-23

Manual 2100-364GPage 1

MODEL NOMENCLATURE LEGEND

NOTE: Never set intake blower at a lower speed thanthe exhaust blower, as it will create anegative pressure in the room.

During operation below 5 degrees F outdoortemperature, freezing of moisture in the heattransfer wheel can occur. Consult the factoryif this possibility exists.

GENERAL INFORMATIONThe ventilator should only be installed by a trainedheating and air conditioning technician. Theseinstructions serve as a guide to the technician installingthe ventilator package. They are not intended as a step-by-step procedure with which the mechanically-inclinedowner can install the package.The ventilator housing is shipped in one carton, whichcontains the following:

1. Energy Recovery Ventilator2. Service Door3. Rain Hood and Mist Eliminator4. Installation Instructions

UNPACKINGUpon receipt of the equipment, be sure to compare themodel number found on the shipping label with theaccessory identification information on the ordering andshipping document to verify that the correct accessoryhas been shipped.

Inspect the carton housing of each ventilator as it isreceived, and before signing the freight bill, verify thatall items have been received and that there is no visibledamage. Note any shortages or damage on all copies ofthe freight bill. The receiving party must contact thelast carrier immediately, preferably in writing,requesting inspection by the carrier�s agent. Concealeddamage not discovered until after loading must bereported to the carrier within 15 days of its receipt.

GENERAL DESCRIPTIONThe Energy Recovery Ventilator was designed to provideenergy efficient, cost effective ventilation to meet I.A.Q.(Indoor Air Quality) requirements while still maintaininggood indoor comfort and humidity control for a variety ofapplications such as schools, classrooms, lounges,conference rooms, beauty salons and others. It providesa constant supply of fresh air for control of airbornepollutants including CO2, smoke, radon, formaldehyde,excess moisture, virus and bacteria.

The ventilator incorporates patented rotary heatexchanger technology to remove both heat and moisture.

It is designed as a single package, which can be easilyfactory or field installed for new installations or retrofit toBard WG wall mounted units. The package consists of aunique rotary Energy Recovery Cassette that can be easilyremoved for cleaning or maintenance. The cassette has a21-inch diameter heat transfer wheel for efficient heattransfer. The heat transfer wheel uses a permanentlybonded dry desiccant coating for total heat recovery.

Ventilation is accomplished with two (2) blower/motorassemblies each consisting of a drive motor and dualblowers for maximum ventilation at low sound levels.On single toggle switch models, the air is exhausted atthe same rate that fresh air is brought into the structure,thus not impacting building pressure. On dual toggleswitch models, the air can be exhausted at a different ratethan the intake or fresh air. Never operate the fresh air ata lower speed than the exhaust air. Operating the freshair at a higher speed than the exhaust air will helpmaintain a slight positive pressure in the building. Therotating energy wheel provides the heat transfereffectively during both summer and winter conditions.Provides required ventilation to meet the requirements ofASHRAE 62-1989 standard.

WG = Wall Mount Gas ElectricModification Code

Energy Recovery VentilatorCabinet Size 3 = WG24, WG30, WG36 5 = WG42, WG48, WG60

ELECTRICAL A = 230/208 VOLT B = 460 VOLT

WG ERV � A 5 B

ELECTRICAL SPECIFICATIONS

ledoM egatloV spmAlortnoCegatloV

3A-VREGW5A-VREGW 802/032 1.2 V42

3C-VREGW5C-VREGW 064 1.1 V42

ElectricalA = 230/208 voltC = 460 volt


WINTER HEATING PERFORMANCE(INDOOR DESIGN CONDITIONS 70° F DB)

NOTE: Sensible performance only is shown for winter application

LEGEND:

VLT = Ventilation Load � TotalVLS = Ventilation Load � SensibleVLL = Ventilation Load � LatentHRT = Heat Recover � TotalHRS = Heat Recovery � SensibleHRL = Heat Recovery � LatentWVL = Winter Ventilation LoadWHR = Winter Heat Recovery

APPLICATION DATA � WGERV-*3SUMMER COOLING PERFORMANCE

(INDOOR DESIGN CONDITIONS 75°DB/63°WB)

tneibmA.D.O

ETARNOITALITNEV

MFC054.FFE%67

MFC073.FFE%87

MFC082.FFE%08

F°BD LVW RHW LVW RHW LVW RHW

56 0094 0273 0043 0562 0042 0291

06 0046 0684 0094 0283 0093 0213

55 0097 0006 0046 0994 0045 0234

05 0049 0517 0097 0616 0096 0255

54 00811 0798 0099 0277 0058 0086

04 00141 01701 00811 0029 00301 0428

53 00371 05131 00531 03501 00211 0698

03 00981 06341 00751 05221 00731 06901

52 00212 01161 00771 00831 00451 02321

02 00632 04971 00791 07351 00171 08631

51 00952 08691 00712 03961 00881 04051

tneibmA.D.O

MFC054�ETARNOITALITNEV)kcalB(deepShgiH

YCNEICIFFE%27

MFC073�ETARNOITALITNEV)eulB(deepSmuideM

YCNEICIFFE%37

�ETARNOITALITNEV 082 MFC)deR(deepSwoLYCNEICIFFE%47

/BDBW F TLV SLV LLV TRH SRH LRH TLV SLV LLV TRH SRH LRH TLV SLV LLV TRH SRH LRH

501570756

004710082100821

008210082100821

006400

0052100290029

002900290029

003300

002510021100211

002110021100211

000400

0011100280028

002800280028

009200

0042100190019

001900190019

003300

002900760076

007600760076

005200

001

0857075606

0066200571007010070100701

0070100701007010070100701

009510086000

0019100621007700770077

00770077007700770077

004110094000

0043200451004900490049

00490049004900490049

000410006000

0017100211009600960096

00960096009600960096

002010034000

0098100421006700670067

00670067006700670067

003110084000

000410029006500650065

00650065006500650065

00480063000

59

0857075606

0086200771006900680068

00680068006800680068

002810019000100

0039100721009600260026

00260026002600260026

00131005600700

0043200551004800570057

00570057005700570057

00951000800900

0017100211001600550055

00550055005500550055

00611007500600

0009100521008600160016

00160016001600160016

00921004600700

000410029000500540054

00540054005400540054

0059007400500

09

0857075606

0086200771006900460046

00460046004600460046

0040200311002300

0038100721009600640064

00640064006400640064

007410018003200

0053200651004800650065

00650065006500650065

0097100001008200

0027100411001600140014

00140014001400140014

001310037000200

0019100721009600640064

00640064006400640064

005410018003200

001410049001500430043

00430043004300430043

007010006007100

58

0857075606

0017200971007900340034

00340034003400340034

0082200631004500

0059100921009600130013

00130013001300130013

004610089008300

0083200851006800830083

00830083008300830083

0000200021008400

0047100511003600820082

00820082008200820082

006410078005300

0029100721009600030003

00030003000300030003

002610079009300

002410049001500220022

00220022002200220022

000210027009200

0857075606

0081008900520012

0012001200120012

0095100770040

00031000700810051

0051005100510051

00511005500030

00851007800320091

0091009100910091

0093100860040

00511003600710041

0041004100410041

0010100940030

00821000700810051

0051005100510051

0031100550030

0059002500310011

0011001100110011

004800140020

57 0756

000010062

00

000010062

00270091

00

00270091

00880042

00

00880042

00460571

00

00460571

00170091

00

00170091

00250041

00

00250041


LEGEND:

VLT = Ventilation Load � TotalVLS = Ventilation Load � SensibleVLL = Ventilation Load � LatentHRT = Heat Recover � TotalHRS = Heat Recovery � SensibleHRL = Heat Recovery � LatentWVL = Winter Ventilation LoadWHR = Winter Heat Recovery

WINTER HEATING PERFORMANCE(INDOOR DESIGN CONDITIONS 70° F DB)

NOTE: Sensible performance only is shown for winter application

tneibmA.D.O

ETARNOITALITNEV

MFC054.FFE%77

MFC073.FFE%87

MFC082.FFE%97

F°BD LVW RHW LVW RHW LVW RHW

56 0073 0582 0503 0832 0042 0091

06 0716 0574 0905 0793 0004 0613

55 0068 0266 0907 0355 0855 0044

05 00011 0748 0709 0707 0417 0465

54 06431 06301 00111 0668 0378 0096

04 09851 03221 00131 02201 00301 0418

53 02381 00141 00151 08711 00911 0049

03 05702 07951 00171 04331 06431 00601

52 08132 05871 00191 00941 04051 08811

02 01652 02791 00112 06461 02661 03131

51 00082 06512 08032 00081 07181 05341

APPLICATION DATA � WGERV-*5SUMMER COOLING PERFORMANCE

(INDOOR DESIGN CONDITIONS 75°DB/63°WB)

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MFC054�ETARNOITALITNEV)kcalB(deepShgiH

YCNEICIFFE%06

MFC073�ETARNOITALITNEV)eulB(deepSmuideM

YCNEICIFFE%26

�ETARNOITALITNEV 082 MFC)deR(deepSwoLYCNEICIFFE%46

/BDBW F TLV SLV LLV TRH SRH LRH TLV SLV LLV TRH SRH LRH TLV SLV LLV TRH SRH LRH

501570756

001910354103541

035410354103541

075400

0641102780278

027802780278

047200

092610932109321

093210932109321

009300

0010108670867

086708670867

024200

0003108890889

088908890889

021300

023802360236

023602360236

000200

001

0857075606

0031300191072210722107221

0722107221072210722107221

030910386000

0878106411063706370637

06370637063706370637

024110014000

0076209261074010740107401

0740107401074010740107401

032610285000

0556100101094609460946

09460946094609460946

060010163000

0821200031043804380438

04380438043804380438

049210664000

026310238043504350435

04350435043504350435

08280892000

59

0857075606

0031300191005010000100001

0000100001000010000100001

00312001900500

0878106411003600060006

00060006000600060006

08721064500300

0076209261000900680068

00680068006800680068

00181096700400

0556100101085503350335

03350335033503350335

02211077405200

0821200031041700860086

00860086008600860086

08441002604300

026310238075405340534

05340534053405340534

0729079302200

09

0857075606

00313001910050103770377

03770377037703770377

0753207311077200

0878106411003604640464

04640464046404640464

041410286066100

0076209261000909560956

09560956095609560956

011020079014200

0556100101085558045804

58045804580458045804

564215106094100

0821200031041705250525

05250525052505250525

030610577098100

026310238075406330633

06330633063306330633

062010694012100

58

0857075606

00313001910050107450745

07450745074507450745

0385203631030500

0878106411003608230823

08230823082308230823

005510818020300

0076209261000907640764

07640764076407640764

0302202611033400

0556100101085509820982

09820982098209820982

066310127096200

0821200031041702730273

02730273027302730273

065710829024300

026310238075408320832

08320832083208320832

042110495091200

0857075606

001910050100450023

0023002300230023

00951003700220

06411003604230291

0291029102910291

0459083402310

09261000900640372

0372037203720372

06531072607810

00101085505820961

0961096109610961

0148098306110

00031041707630022

0022002200220022

00801049407410

0238075405320041

0041004100410041

029607130590

57075606

005010045009

009009009

006900540

003604230

000

003604230

00090064007

007007007

003800930

08550582004

004004004

081505420

04170763006

006006006

045607030

07540532083

083083083

091407910


BASIC INSTALLATION (Field Installation)1. Unpack the ventilator assembly, which includes the

integral ventilator with attached electrical harnessand miscellaneous hardware.

IMPORTANT NOTE: Position front lip of ventilatorover front grille and on top of condenser partition.(See Figure 5.) This is important to insure properdrainage of any water entering damper assembly.

7. Remove cassette and plug in exhaust blower.Replace cassette. (See Figure 6.)

8. Open control panel to gain access to unit lowvoltage terminal block. (Insure all power is OFFprior to opening the control panel.)

9. Remove female plug of low voltage wiring harnessfrom the heat recovery assembly and snap into filterrack. Route electrical harness leads through the 7/8"bushing into the low voltage box. (See Figure 5.)

10. Temporarily connect leads C (black), WI (blue), andG (orange) with fork terminal to correspondingpoints on terminal strip. (See Figures 7 for 230Vunits and 8 for 460V units and wiring diagram.)

NOTE: These 24 volt control wires control thestarting and stopping of the Energy RecoveryVentilator and can be independently controlledby an energy management control or timer.See separate section on Control Wiring forsuggested control schemes.

11. Remove female plug of high voltage wiring harnessfrom the heat recover assembly and snap into filterrack. Wire to terminal block. (See Figures 7 for230V units and 8 for 460V units and wiringdiagram.)

12. Plug male plug from female at filter rack.(See Figures 5.)

13. Close control panel cover.14. Replace filter and one (1) screw in condenser grille.

(See Figure 3)15. Ventilator checkout

A. Resupply power to unit.B. Energize the evaporator blower by

switching thermostat to the manual fanposition with Heat/Cool in OFF position.

C. Ventilator heat transfer wheels shouldrotate slowly (49 RPM). Intake andexhaust blowers should run.(See Figure 9.)

D. De-energize the evaporator blower.Energy Recovery wheels, and fresh airand exhaust air blowers should stop.

E. This completes ventilator checkout.

2. Remove intake hood assembly from back ofventilator. (See Figure 1.)

3. Remove the existing exterior vent option door onthe unit. (See Figure 2.)

4. Remove and save existing unit air filter. Removeand discard the rear exhaust cover plate and removecenter screw from condenser grille. (See Figure 3.)

5. Install exhaust blower assembly in rear exhaustopening and secure with four (4) screws. Position 4pin connector so it is accessible. (See Figure 4.)

6. Install ventilator into the unit. (See Figure 5.)

ledoMhtiWesUroFstinUgniwolloF lacirtcelE

3A-VREGWB-,A-*42GWB-,A-*03GWB-,A-*63GW

1-802/032esahp3ro

5A-VREGWB-,A-*24GWB-,A-*84GWB-,A-*06GW

1-802/032esahp3ro

3C-VREGWC-*42GWC-*03GWC-*63GW

esahp3-064

5C-VREGWC-*24GWC-*84GWC-*06GW

esahp3-064

WARNINGOpen and lock unit disconnect switch beforeinstalling this accessory to prevent injury ordeath due to electrical shock or contact withmoving parts. Turn thermostat to OFF.

CAUTIONBe sure the correct model and voltage EnergyRecovery Ventilator is used with the correctair conditioner or heat pump to insure correctvoltage compatibility.


FIGURE 1INTAKE HOOD ASSEMBLY

16. Disconnect the wires temporarily connected inStep 10 if other control options are to be used.

17. Replace the lower service access panel with thenew panel provided. Attach air intake hood withscrews provided. (See Figure 9.) Be sure to insertthe top flange of the air intake hood into andthrough the slot in the service door and between thedoor and insulation to prevent bowing of the door.

18. Close front door.

19. Apply Certification label, included with InstallationInstructions, next to unit Serial Plate.

19. Ventilator is now ready for operation.


FIG

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VEN

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FIGURE 3FILTER AND EXHAUST PLATE LOCATION


FIGURE 4INSTALLATION OF EXHAUST BLOWER ASSEMBLY


FIGURE 5INSTALLATION OF WGERV


FIGURE 6WGERV ASSEMBLY


FIGURE 7WIRING � 230 VOLT


FIGURE 8WIRING � 460 VOLT


FIGURE 9INSTALLATION OF FRESH AIR INTAKE HOOD ASSEMBLY


FIGURE 10OPERATION OF UNIT WITH WGERV INSTALLED


BASIC INSTALLATION(FACTORY INSTALLED VERSIONS)1. Remove air intake hood from return air area of unit.

(See Figure 1.)

2. Install air intake hood. Refer to Item 17 of BasicInstallation (Field Installation).

3. Refer to Control Wiring section for suggestedcontrol schemes for the WGERV.

4. After wiring, replace all panels.

CONTROL WIRINGThe WGERV comes from the factory with the lowvoltage control wires wired into the wall mount lowvoltage terminal strip (see wiring diagrams). Care mustbe taken when deciding how to control the operation ofthe ventilator. When designing the control circuit forthe ventilator, the following requirements must be met.

CONTROL REQUIREMENTS

1. Indoor blower motor must be run whenever theWGERV is run.

2. Select the correct motor speed tap in the WGERV.Using Table 1 of the WGERV InstallationInstructions determine the motor speed needed toget the desired amount of ventilation air needed.For instance, do not use the high speed tap on aWGERV if only 200 CFM of ventilation air isneeded. Use the low speed tap. Using the highspeed tap would serve no useful purpose andsignificantly affect the overall efficiency of the airconditioning system. System operating cost wouldalso increase.

3. Run the WGERV only during periods when theconditioned space is occupied. Running theWGERV during unoccupied periods wastes energy,decreases the expected life of the WGERV, and canresult in a large moisture buildup in the structure.The WGERV removes 60 to 70% of the moisture inthe incoming air, not 100% of it. Running theWGERV when the structure is unoccupied allowsmoisture to build up in the structure because there islittle or no cooling load. Thus, the air conditioner isnot running enough to remove the excess moisturebeing brought in. Use a control system that in someway can control the system based on occupancy.

RECOMMENDED CONTROL SEQUENCESSeveral possible control scenarios are listed below:

1. Use a programmable electronic thermostat withauxiliary terminal to control the WGERV based ondaily programmed occupance periods. Bardmarkets and recommends the White-Rodgers1F93-380 (Bard Part No. 8403-049) programmableelectronic thermostat for air conditionerapplications. (See Figure 11.)

2. Use a motion sensor in conjunction with amechanical thermostat to determine occupancy inthe structure. Bard markets the CS2000 for this use.(See Figure 12.)

3. Use a DDC control system to control the WGERVbased on a room occupancy schedule to control theWGERV.

4. Tie the operation of the WGERV into the lightswitch. The lights in a room are usually on onlywhen occupied.

5. Use a manual timer that the occupants turn toenergize the WGERV for a specific number ofhours.

6. Use a programmable mechanical timer to energizethe WGERV and indoor blower during occupiedperiods of the day.

VENTILATION AIR FLOWThe 240 volt WGERV is equipped with a 3-speedmotor to provide the capability of adjusting theventilation rates to the requirements of the specificapplication by simply changing motor speeds. The 460volt WGERV is equipped with a 2-speed motor.

* * IMPORTANT * *Operating the WGERV during unoccupiedperiods can result in a build up of moisture inthe structure.


All units are factory set on High speed and can be fieldadjusted for lower speeds if required.240-Volt Units (Single switch models): The speed ofboth blowers (intake and exhaust) can be controlled by aswitch located on the left side of the control panel,behind the WGERV front door.240-Volt Units (Dual switch models): The speed ofeach blower (intake and exhaust) can be controlledindependently by two (2) switches located on the left sideof the control panel, behind the WGERV front door. Theswitch located on the upper part of the control panelcontrols the intake blower located in the upper assembly.The switch located on the lower part of the control panelcontrols the exhaust blower located in the lowerassembly. See Figure 6.460-Volt Units: The speed of each blower (intake andexhaust) can be changed by revising the wiring of eachblower. See Wiring Diagram on 460 Volt modelslocated later in this manual for specific details on wiringof blowers for low speed applications.

If desired, the intake blower can be set up for one speedand the exhaust blower set up for another speed if neededfor the specific application.

TABLE 1VENTILATION AIR (CFM)

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)kcalB(deepS.deM

)eulB(deepSwoL

)deR(

3A-VREGW 054 073 082

5A-VREGW 054 073 082

3C-VREGW 054 A/N 073

5C-VREGW 054 A/N 073

WARNINGOpen disconnect to shut all power OFFbefore doing this. Failure to do so couldresult in injury or death due to electricalshock.

ENERGY RECOVERY VENTILATORMAINTENANCE

GENERAL INFORMATIONThe ability to clean exposed surfaces within air movingsystems is an important design consideration for themaintenance of system performance and air quality. Theneed for periodic cleaning will be a function of operatingschedule, climate, and contaminants in the indoor airbeing exhausted and in the outdoor air being supplied tothe building. All components exposed to the airstream,including energy recovery wheels, may require cleaningin most applications.

Rotary counterflow heat exchanges (heat wheels) withlaminar airflow are �self-cleaning� with respect to dryparticles. Smaller particles pass through; larger particlesland on the surface and are blown clear as the flowdirection is reversed. For this reason, the primary needfor cleaning is to remove films of oil-based aerosols thathave condensed on energy transfer surfaces. Buildup ofmaterial over time may eventually reduce airflow. Mostimportantly, in the case of desiccant coated (enthalpy)wheels, such films can close off micron sized pores at thesurface of the desiccant material, reducing the efficiencywith which the desiccant can absorb and desorb moisture.

FREQUENCYIn a reasonably clean indoor environment such as aschool, office building, or home, experience shows thatreductions of airflow or loss of sensible (temperature)effectiveness may not occur for ten or more years.However, experience also shows that measurable changesin latent energy (water vapor) transfer can occur inshorter periods of time in commercial, institutional andresidential applications experiencing moderate occupantsmoking or with cooking facilities. In applicationsexperiencing unusually high levels of occupant smoking,such as smoking lounges, nightclubs, bars andrestaurants, washing of energy transfer surfaces, asfrequently as every six months, may be necessary tomaintain latent transfer efficiency. Similar washingcycles may also be appropriate for industrial applicationsinvolving the ventilation of high levels of smoke or oil-based aerosols such as those found in welding ormachining operations, for example. In these applications,latent efficiency losses of as much as 40% or more maydevelop over a period of one to three years.

CLEANABILITY AND PERFORMANCEIn order to maintain energy recovery ventilation systems,energy transfer surfaces must be accessible for washing toremove oils, grease, tars and dirt that can impedeperformance or generate odors. Washing of the desiccantsurfaces is required to remove contaminate buildups thatcan reduce adsorption of water molecules. The continuedability of an enthalpy wheel to transfer latent energydepends upon the permanence of the bond between thedesiccant and the energy transfer surfaces.

Bard wheels feature silica gel desiccant permanentlybonded to the heat exchange surface without adhesives;the desiccant will not be lost in the washing process.Proper cleaning of the Bard energy recovery wheel willrestore latent effectiveness to near original performance.

MAINTENANCE PROCEDURESNOTE: Local conditions can vary and affect the

required time between routine maintenanceprocedures, therefore all sites (or specific unitsat a site) may not have the same schedule tomaintain acceptable performance. Thefollowing timetables are recommended and canbe altered based on local experience.


QUARTERLY MAINTENANCE

1. Inspect mist eliminator/prefilter and clean ifnecessary. This filter is located in the fresh airintake hood on the front of the unit. This is analuminum mesh filter and can be cleaned withwater and any detergent not harmful to aluminum.

2. Inspect wall mount unit filter and clean or replaceas necessary. This filter is located either in theunit, in a return air filter grille assembly, or both.If in the unit it can be accessed by removing thelower service door on the front of the unit. If in areturn air filter grille, by hinging the grille open togain access.

3. Inspect energy recovery ventilator for proper wheelrotation and dirt buildup. This can be done inconjunction with Item 2 above. Energize theenergy recovery ventilator after inspecting the filterand observe for proper rotation and/or dirt buildup.

4. Recommended energy recovery wheel cleaningprocedures follow: Disconnect all power to unit.Remove the lower service door of the wall mountunit to gain access to the energy recoveryventilator.

5. Remove the front access panel on the ventilator.Unplug amp connectors to cassette motors. Slideenergy recovery cassette out of ventilator.

6. Use a shop vacuum with brush attachment to cleanboth sides of the energy recovery wheels.

7. Reverse shop vacuum to use as a blower and blowout any residual dry debris from the wheel.

NOTE: Discoloration and staining of the wheeldoes not affect its performance. Onlyexcessive buildup of foreign material needsto be removed.

8. If any belt chirping or squealing noise is present,apply a small amount of LPS-1 or equivalent dryfilm lubricant to the belt.

ANNUAL MAINTENANCE

1. Inspect and conduct the same procedures asoutlined under Quarterly Maintenance.

2. To maintain peak latent (moisture) removalcapacity, it is recommended that the energyrecovery wheels be sprayed with a diluted nonacidbased evaporator coil cleaner or alkaline detergentsolution such as 409.

NOTE: Do not use acid based cleaners, aromaticsolvents, temperatures in excess of 170° F orsteam. Damage to the wheel may result.

Do not disassemble and immerse the entireheat wheel in a soaking solution, as bearingand other damage may result.

3. Rinse wheel thoroughly after application of thecleaning solution, and allow to drain beforereinstalling.

4. No re-lubrication is required to heat wheelbearings of the drive motor, or to the intake andexhaust blower motors.

5. If any belt chirping or squealing noise is present,apply a small amount of LPS-1 or equivalent dryfilm lubricant to the belt.


FIGURE 11THERMOSTAT WIRING DIAGRAM


FIGURE 12GAS ELECTRIC CONNECTION DIAGRAM


FIGURE 13HUB ASSEMBLY WITH BALL BEARING

INSTALLATION INSTRUCTIONS ENERGY RECOVERY … · Modification Code Energy Recovery Ventilator...

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