PAGE 1

I - Ship ping And Pack ing List

Package 1 of 1 contains:

1 - Energy Recovery Ventilator Assembly1 - Rooftop Unit Adapter Panel1 - Return Air Balancing Damper Assembly2 - Top Filler Panels1 - Box Assembly

1 - Bag Assembly of Mounting Screws1 - Low Voltage wiring Harness

II - Shipping Damage

Check unit for shipping damage. Receiving party shouldcontact last carrier immediately if shipping damage isfound.

III - General

These instructions are intended as a general guide and donot supersede local codes in any way. Authorities havingjurisdiction should be consulted before installation.

IV - Requirements

When installed, the unit must be electrically wired andgrounded in accordance with local codes or, in theabsence of local codes, with the current National ElectricCode, ANSI/NFPA No. 70.

V - Ap pli ca tion

Unitary Energy Recovery Ventilator (UERV) are used withYork rooftop units. These wheels conserve energy bymixing warmer air with cooler air in the following manner:

Re cov ery Wheel Mode

The Recovery Wheel mode is accomplished by twoblowers providing continuous exhaust of stale indoor airand replacement by equal amount of outdoor air. Energyrecovery is achieved by slowly rotating the energyrecovery wheel within the cassette frame work. In winter,the UERV adsorbs heat and moisture from the exhaust airstream during one half of a complete rotation and givesthem back to the cold, drier intake air supply during theother half rotation. In summer, the process is automaticallyreversed. Heat and moisture are absorbed from incomingfresh air supply and transferred to the exhaust air stream.This process allows outdoor air ventilation rates to beincreased by factors of three or more without additionalenergy penalty or increase in size of heating or airconditioning systems.

VI - Rig ging Unit For Lift ing

1. Maximum weight of unit is — 198 Lbs. [Boxed].

2. Remove Box and retrieve box assembly that is insideof UERV.

3. All panels must be in place for rigging.

4. Lifting straps are needed to lift the unit.

Energy recovery COMPONENT certifiedto the ARI Air-to-Air Energy RecoveryVentilation Equipment CertificationProgram in accordance w ith ARIStandard 1060-2000 . Actual performancein packaged equipment may vary.

ETL Certified per UL 1995 and CSA 22.2

MAXA-MI$ER�

UNITARY ENERGY RECOVERY VENTILATORMODEL VR006A05H & B05H (STATIONARY)

INSTALLATIONINSTRUCTIONS

035-19258-001-A-1105 / R06A-24YDW

CAUTIONDanger of sharp metallic edges. Can cause injury.Take care when servicing unit to avoid accidentalcontact with sharp edges.

WARNINGElectric shock hazard. Can cause injuryor death. Before attempting to performany service or maintenance, turn theelectrical power to unit OFF atdisconnect switch(es). Unit may havemultiple power supplies.

VII - In stal la tion

1. Disconnect all power to rooftop unit.

2. At the rooftop unit with UERV box assembly openedremove adapter panel.

3. On rooftop unit remove and discard horizontal returnair cover. See Figure 1. Also remove adapter panelfrom face of UERV.

4. Then place adapter panel over opening to locatescrews that need to be remove to secure panel.Remove screws and attach panel. See Figure 2.

5. Invert leg assemblies from UERV into rear multi-holesleeve with foot on the bottom. Project leg until top holeis above sleeve and secure with screws.

6. Position with UERV open face pointed toward adapterpanel and install 1 ¼" gasket material to middle deck of UERV. See Figure 4.

7. Lower base pan of UERV into bottom lip of adapterpanel.

8. Position UERV so edges of adapter panel fits insideUERV as back is elevated.

9. After adapter panel is in place lower legs and lock intoplace with screws.

10. Next fasten UERV to adapter plate with providedscrews along both corner post.

11. Remove return air side access panel and removefilters.

12. Take return air balancing damper assembly from boxassembly and insert through side access. Alignbalancing damper with middle deck of UERV. Gasketmay be trimmed to mount on assembly. See Figure 3and 4.

13. Fasten into place with (2) self drill screws provided inbox assembly.

14. Route field wire harness (provided) through rooftopunit divider panel and under return air balancingdamper to horizontal duct opening. Then connectwires in parallel with thermostat terminals. See FieldWiring Diagram.

15. Locate the (3) circuit low voltage at UERV from leftside and terminal strip on circuit board. Connect withfield wire harness.

16. Replace filters.

17. Filler panel is installed by removing screws in rooftopunit around the top and two screws above UERV.Position filler panel and secure into place byreinserting the remove screws. (NOTE: two additionalscrews (provided self-drill) with also be used in theremaining pilot holes to secure filler panel. Thesecannot be longer than ½" or damage can be done tocoil (5 ton unit takes larger filler panel). See Figure 5.

18. Seal, if required, along face (top and sides) of UERVunit where it meets rooftop unit to insure no airleakage.

19. All electrical connections must conform to any localcodes and current National Electric Codes (NEC) andCanadian Electric Codes (CEC). Refer closely to unitwiring diagram in unit and / or in these instructions forproper wiring connections.

20. Refer to the unit nameplate for minimum circuitampacity and maximum overcurrent protection size.

PAGE 2

Figure 1

Figure 3

Figure 2

ADAPTER PANEL

REMOVE PANEL

BALANCING DAMPER

MAXA-MI$ER�

UNITARY ENERGY RECOVERY VENTILATORMODEL VR006A05H & B05H (STATIONARY)

INSTALLATIONINSTRUCTIONS

035-19258-001-A-1105 / R06A-24YDW

PAGE 3

21. Electrical data is listed on unit rating plate and motornameplates.

22. Run high voltage conduit to disconnect switch (fieldprovided).

23. Then connect from switch to control box throughknockout in corner panel.

24. Open control box on UERV and identify high and lowvoltage terminal blocks.

25. Connect line voltage wiring to the right side terminalstrip inside control box as shown in wiring diagramfrom disconnect switch.

26. Ground unit with a suitable ground connection eitherthrough unit supply wiring or an earth ground.

27. Turn power switch "on" at circuit board.

28. Close control box in UERV.

29. Place all door panels on UERV and rooftop unit.

30. Restore power to unit.

31. Start system up to verify operation.

32. Balancing is done by removing the plastic plugs indoor panels (4 total).

33. With a manometer measure pressure drop [ inches ofwater column] across the top half of UERV (top holesin door panel). Unit CFM is determined by referring toTable #1. If CFM values are not per design, adjustinternal dampers inside the rooftop unit. This isaccomplished by removing door panel at the return airopening, loosing screw in center of damper, then slidedamper up or down in the return airstream andre-tighten screw. Replace door panel and repeatmeasurement method.

34. Place plastic plugs back into door panels

35. Cleanup once UERV is operating properly. Caulk anyopen joints, holes or seams to make the unitscompletely air and water tight.

36. Fill out installation checklist and start-up sheet in backof this instruction.

37. Leave this instruction manual with owner or in anenvelope to be kept near the unit. Final assemblyshould resemble Figure 6.

VIII - Op er a tion

How It Works

The unit contains an Energy Recovery Wheel (ERW) thatis a new concept in rotary air-to-air heat exchanger.Designed as a packaged unit for ease of installation andmaintenance, only matching up to rooftop unit with aninternal economizer and connection of electrical power isrequired to make the system operational. The conceptconsists of a unique rotary energy recovery wheel thatrotates in and out of fresh air streams within a heavy duty,permanently installed blower cabinet that provides readyaccess to all internal components. The media is polymericmaterial that is coated and permanently bonded with a dry

Figure 5

Figure 6

Figure 4

TOP FILLER PANEL

BALANCING DAMPER

MIDDLE DECK

MAXA-MI$ER�

UNITARY ENERGY RECOVERY VENTILATORMODEL VR006A05H & B05H (STATIONARY)

INSTALLATIONINSTRUCTIONS

035-19258-001-A-1105 / R06A-24YDW

GASKET

PAGE 4

desiccant for total enthalpy recovery. The wheel is beltdriven by PSC motor and drive belt.

When slowly rotating through counter flowing exhaust andfresh air streams the UERV adsorbs sensible heat andlatent heat from the warmer air stream and transfer thistotal energy to the cooler air stream during the second halfof its rotating cycle. Rotating at 60 revolutions per minute,the wheel provides constant flow of energy from warmer tocooler air stream. The large energy transfer surface andlaminar flow through the wheel causes this constant flowof recovered energy to represent up to 85% of thedifference in total energy contained within the two airstreams.

Sensible and latent heat are the two components of totalheat. Sensible heat is energy contained in dry air and latentheat is the energy contained within the moisture of the air.The latent heat load from the outdoor fresh air on an airconditioning system can often be two to three times that ofthe sensible heat load and in the winter it is a significantpart of a humidification heat load.

During both the summer and winter, the UERV transfersmoisture entirely in the vapor phase. This eliminates wetsurfaces that retain dust and promote fungal growth as well as the need for a condensate pan and drain to carry water.

Because it is constantly rotating when in the air stream, theUERV is always being cleared by air, first in one directionthen the other. Because it is always dry, dust or otherparticles impinging on the surface during one half cycle,are readily removed during the next half cycle.

Re cov ery Mode

On a thermostat call for blower operation in heating,cooling or continuous blower, the ERW will rotate betweenfresh air and exhaust air streams. Both the fresh air andexhaust air blowers will also be operating to overcome theair resistance of the UERV.

Additional Information for Options are provided inOptions Manual

IX - System Check

1. Disconnect main power.

2. Remove control access panel and apply 24 volts to low voltage terminal strip at "TB37-1(+) and TB37-2(-)".

3. Restore power to unit. Observe UERV wheel rotationand both fresh air and exhaust air blower areoperating.

A - Re turn Air Bal ancing Damper Set tings

Manually adjust position of dampers. This is accomplishedby loosing and tightening screws on slide damper.

B - Blower Speed Ad justment

Blower speed selection is accomplished by changing theselector switch (refer to wiring diagram) on both fresh airand exhaust air blowers. All blowers are factory set at"high" for maximum airflow. To determine air flow setting,external static pressure readings will need to be readacross the UERV.

C - Air Balancing Ad justment

1. Remove plastic plugs in door panels(4 total).

2. With a manometer measure pressure drop [inches ofwater column] across top half of UERV (top holes indoor panel). Unit CFM is determined then by referringto Table #1. If CFM values are not per design, adjustdamper in fresh air hood and repeat measure method.

3. Repeat the same process for the bottom half of UERV.If CFM values are not per design, adjust internaldampers inside the rooftop unit. This is accomplishedby removing door panel at the return air opening,loosing screw in center of damper, then slide damperup or down in the return airstream and re-tightenscrew. Replace door panel and repeat measurementmethod.

4. Place plastic plugs back in to door panels.

X - Main tenance

Mo tor Main te nanceAll mo tors use prelubricated sealed bear ings; no fur therlu bri ca tion is nec es sary.

Mechanical InspectionMake visual inspection of dampers, linkage assembliesand UERV rotating bearings during routine maintenance.Filters should be checked periodically and cleaned whennecessary. Filter is located in fresh air hoods. DO NOTreplace permanent filters with throwaway type filters.

En ergy Re cov ery Wheel Main te nanceERW seg ment, is po sitioned on a shaft extended frommiddle sup port bar with a block ball bear ing as sembly.Annual in spection of the self clean ing wheel isrec om mended. With power dis con nected, re move UERVaccess pan els (rear and cen ter) and un plug [J150 & P150](Refer to wiring di agram in this in struction man ual).Discoloration and stain ing of UERV seg ment does notaffect its per formance. Only excessive buildup of foreignmaterial need be re moved. If the seg ment ap pearsexcessively dirty, it should be cleaned to en sure max imumoperating ef ficiency. To clean the wheel re move belts,screw from cen ter hub, grasp seg ment by rim and re move.thoroughly spray plas tic sur face with house hold cleanersuch as Fan tastic� or equiv a lent mid dle de ter gent andgently rinse with warm wa ter us ing a soft brush to re moveheavier ac cumulation. Shake excess water from segmentand replace in reverse of removal instructions.

MAXA-MI$ER�

UNITARY ENERGY RECOVERY VENTILATORMODEL VR006A05H & B05H (STATIONARY)

INSTALLATIONINSTRUCTIONS

035-19258-001-A-1105 / R06A-24YDW

PAGE 5

ENERGY RECOVERY VENTILATOR

SCFM vs. PRESSURE DROP

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PAGE 6

R06-24YDW

UERV UNIT SCHEMATIC DIAGRAM

Notes:1. Remove jumper to install field optional low ambient switch.2. Step-down transformer assembly for 208-230/460/575 volt units.3. Matching adapter harness (provided) to connect with rooftop unit. For energy

management systems connect +24v to green and common 24v to black.4. Optional low ambient switch.5. Optional motorized intake damper.6. Optional stop, start and jog control.

PAGE 7

COM PO NENT CODEA134 Fixed Re lay Board

B26 Mo tor, Ex haust Air

B27 Motor, Fresh Air

B28 Mo tor, Des ic cant Wheel

B30 Motor, Damper (Optional)

C23 Capacitor, Wheel Motor

C25 Ca paci tor, Mo tor Ex haust Air

C26 Ca paci tor, Mo tor Fresh Air

DL43 Delay, Cycle Timer (Optional)

F1 Fuse

J33 Jack, Cycle Con trol (Optional)

J34 Jack, Cycle Con trol Harness (Optional)

J40 Jack - Wheel Cycle (Optional)

J92 Jack - Transformer

J96 Jack - Power Interface

J148 Jack, Fresh Air Mo tor Harness

J150 Jack, Wheel Mo tor Harness

J151 Jack, Exhaust Air Mo tor Harness

J153 Jack, Field Harness

J160 Jack, Damper Motor

K94 Relay - On/Off (Op tional)

P1 Plug, P.C. Board (Damper Mo tor)

P2 Plug, P.C. Board (Wheel)

P3 Plug, P.C. Board (Exhaust)

P4 Plug, P.C. Board (Fresh)

P33 Plug, Cycle Con trol (Optional)

P34 Plug, Cycle Con trol Harness (Optional)

P40 Plug, Wheel Cycle (Optional)

P92 Plug, Transformer

P96 Plug, Power Interface

P148 Plug, Fresh Air Motor

P150 Plug, Wheel Mo tor

P151 Plug, Exhaust Air Motor

P153 Plug, Field Harness

P160 Plug, Damper Motor

S23 Ther mo stat, Low Am bi ent (Op tional)

S26 Switch, Low Am bient (Op tional)

S51 Switch, Door

S125 Switch, Am bi ent Over ride (Op tional)

SW1 Switch, Power

SW2 Switch, Speed Change (Exhaust)

SW3 Switch, Speed Change (Fresh)

T27 Trans former, Step- down (Op tional)

TB1 Terminal Block (Low Volt age)

TB2 Terminal Block (High Voltage)

TB3 Ter mi nal Block (Low Am bi ent)

WIRE COLOR

BK Black

BL Blue

GR Green

OR Orange

RD Red

WH White

YL Yel low

Unit#: 01- R0601XX-23/-33/-43

Desiccant Wheel for Roof top Unit208-230/460V/575V (3 PH)

UERV UNIT WIR ING DIAGRAM

Notes:1. Remove jumper to install field optional low ambient switch.2. Step-down transformer assembly for 208-230/460/575 volt units.3. Matching adapter harness (provided) to connect with rooftop unit. For energy

management systems connect +24v to green and common 24v to black.4. Optional low ambient switch.5. Optional motorized intake damper.6. Optional stop, start and jog control.

PAGE 8

PAGE 9

EQ

UIP

ME

NT

LA

Y O

UT

START UP INFORMATION SHEET

VOLTAGE - UERV UNIT

In com ing Volt age L1-L2 L1-L3 L2-L3

Run ning Volt age L1-L2 L 1-L3 L2-L3

Sec ond ary Volt age C (black) to G (green) Volts*

C (black) to W (white) Volts*

* With thermostat calling.

AMPERAGE - UERV MOTORS

In take Mo tor: Nom i nal HP Rated Amps Run ning Amps

Ex haust Mo tor: Nom i nal HP Rated Amps Run ning Amps

Wheel Mo tor: Nom i nal HP Rated Amps Run ning Amps

AIR FLOW

In take De sign CFM Pres sure Drop Cal culated CFM

Ex haust De sign CFM Pres sure Drop Cal culated CFM

Amb. db Temp Re turn Air db Temp* Tem pered Air db Temp*

Amb. wb Temp Re turn Air wb Temp* Tem pered Air wbTemp*

* Mea sure af ter 15 min utes of run time

IN STAL LA TION CHECK LIST

UERV Model # Se rial #

Owner Owner Phone #

Owner Ad dress

In stall ing Con trac tor Start Up Me chanic

� Inspect the unit for transit damage and report any damage on the carrier’s freight bill.

� Check model number to insure it matches the job requirements.

� Install field accessories and unit adapter panels as required. Follow accessory and unit installation manuals.

� Verify field wiring, including the wiring to any accessories.

� Check all multi-tap transformers, to insure they are set to the proper incoming voltage.

� Verify correct belt tension, as well as the belt/pulley alignment. Tighten if needed.

� Prior to energizing the unit, inspect all the electrical connections.

� Power the unit. Bump the motor contactor to check rotation. Three phase motors are synchronized at thefactory. If blower motor fans are running backwards, de-energize power to the unit, then swap two of the threeincoming electrical lines to obtain proper phasing. Re-check.

� Perform all start up procedures outlined in the installation manual shipped with the unit.

� Fill in the Start Up Information as outlined on the opposite side of this sheet.

� Provide owner with information packet. Explain the thermostat and unit operation.

PAGE 10

NOTES

PAGE 11

Unitary 5005 NormanProducts York OKGroup Drive 73069

Supercedes: 035-19258-000-A-0203Subject to change with out no tice. Printed in U.S.A.Copyright © by Unitary Prod ucts Group 2005. All rights re served.

035-19258-001-A-1105R06A-24YDW

NOTES