ERV Systems Pro-Series, Pro-6, Pro-10, Pro-20, Pro-30 Operation Manual

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Pro-Series Energy Recovery Ventilators

Airflow capacities from 500 to 10,000 cfm

Operations Guide

High Performance Ventilation Equipment

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Table of Contents

Pro-Series Outdoor Air Ventilator .................................................................................... 1

Model Description .............................................................................................................. 1

Definitions .......................................................................................................................... 2

Receiving & Inspection ...................................................................................................... 3

Storage ................................................................................................................................. 3

Lifting Technique ................................................................................................................ 3

Overall Dimensions ........................................................................................................... 3

Installation .......................................................................................................................... 4

Curb Mounting .................................................................................................................. 5

Unit Configuration............................................................................................................. 5

Supply & Exhaust Air Flow Dampers ............................................................................. 6

Controls............................................................................................................................... 6

Basic Package ............................................................................................................... 6

Optional Electric Preheat Frost Control .................................................................. 6

Optional Stop/Jog Economizer And Wheel Frost Protection ............................ 7

Optional Rotation Detector Sensor.......................................................................... 7

Thermostat Frost Control......................................................................................... 7

3Ø Circuit Diagram, Pro-6 ................................................................................................. 8

3Ø Circuit Diagram, Pro-10 ............................................................................................... 9

3Ø Circuit Diagram, Pro-20 through Pro-90 ................................................................. 10

1Ø Circuit Diagram, Pro-6 ............................................................................................... 11

1Ø Circuit Diagram, Pro-10 through Pro-50 ................................................................. 12

3Ø Electric Preheat Frost Control Circuit Diagram ...................................................... 13

1Ø Electric Preheat Frost Control Circuit Diagram ...................................................... 13

Electric Preheat Layout ..................................................................................................... 14

Wheel Cassette .................................................................................................................. 15

Service ................................................................................................................................16

Maintenance....................................................................................................................... 16

Power Twist®Plus™V-Belts ............................................................................................ 17

Pro-Series

The information in this operations guide is furnished for informational use only, is subject to change without notice, and should not be construed as a commitment by ERV Systems. ERV Systems assumes no responsibility for any errors that may appear in this operations guide.

No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronic, mechanical, recording, or otherwise, without the prior written permission of ERV Systems.

PowerTwist Plus is a registered trademark of Fenner Drives. ERV Systems and the ERV System’s logo are registered trademarks.

Pro-Series

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Model Description

ERV Systems’ Pro-Series of outdoor air ventilators have been specifically designed to reduce the energy required to heat and cool outdoor air by as much as 80 percent. This unique capability allows both new and existing buildings to benefit from a healthy indoor environment by supplying high amounts of outside air in a very cost-effective manner.

The Pro-Series unit allows HVAC systems to effectively and economically accommodate the increased outdoor air quantities recommended by the American Society of Heating, Refrigerating and Air Conditioning Engineers (ASHRAE) Standard 62. This standard guides the amount of ventilation air that should be introduced to a building to achieve acceptable indoor air quality.

The Pro-Series system is a packaged system which includes supply and exhaust air fans, outdoor and return air filtration, and ERV’s total energy recovery wheel. The wheel recovers both sensible (temperature) and latent (moisture) energy. Therefore, it cools and dehumidifies the outdoor air during the cooling season, while heating and humidifying the air in the heating season.

The wheel utilizes a fluted aluminum sheet that is coated with a fast-acting, adsorbent desiccant. As the transfer media slowly rotates between the outdoor and exhaust air streams, the higher temperature air gives up its sensible energy to the aluminum. This energy is then given up to the cooler air stream during the second half of the revolution. (See Figure 1.)

Just as the temperature is captured and released, so is the moisture. The molecular sieve desiccant coating has a strong attraction to water vapor. Since the opposing air streams have different temperature and moisture contents, they also have different vapor pressures. This difference provides the driving force that causes the transfer of latent energy.

Through the use of a desiccant coating, moisture is recovered from an exhaust air stream without transferring the airborne pollutants contained within the exhaust airstream to the supply air stream.

On the front of the Pro-Series unit is an identification label. The specifications on the label correspond to the actual unit. The model number (Pro-6, Pro-10, Pro-20, etc.) refers to the nominal air volume (cfm) that the ProSeries ventilator supplies to the space.

PO Box 1797 Columbia, MO 65205-1797

Model :

Serial No. :

Tag :

Volts :

Freg. :

Phase :

Amps :

MFG Date :

Suitable For Outdoor Use Use Time-Delay Fuses or HACR-Type Circuit Breakers

Figure 2. Figure 2.

Figure 2. Typical Pro-Series nameplate with electrical

Figure 2. Figure 2.

data.

(573) 886-5400 FAX(573) 886-5401

PRO20H-5RN2AA

1002/15250-000

ERU-1

240

10.00 Min. Supply Circuit Ampacity :

May, 2001

Exhaust Blower Motor :

Supply Blower Motor :

Preheater :

Max. Overcurrent Protection :

Manufactured under U.S Patents 4,769,053 & 6,016,710

0.75

1.50

N/A

9700598

CONFORMS TO

UL STD 1812

2.8

5.6

13.5

Amps

Pro-Series

Outdoor Air 95°F, 110gr/lb (C) 5°F, 4gr/lb(H)

Supply Air 80°F, 76gr/lb (C) 54°F, 25gr/lb (H)

Figure 1.Figure 1.

Figure 1. An inside view of the Pro-Series Preconditioner

Figure 1.Figure 1.

Return Air 75°F, 65gr/lb (C) 70°F, 32gr/lb (H)

with typical operating temperatures during the cooling (C)

and heating (H) season respectively.

Exhaust Air 90°F, 99gr/lb(C) 21°F, 9gr/lb (H)

Definitions

Adsorption – The physical bonding of water vapor on the surface of the desiccant.

Cassette – The framework supporting the wheel. (See also Wheel.)

Desiccant – A naturally occurring or man-made material with a high affinity for water vapor. ERV uses a desiccant

material which minimizes cross contamination.

Enthalpy wheel – A common term used to describe all rotating, wheel-shaped heat transfer devices that exchange sensible (temperature) and latent (water vapor) energy from one airstream to another. The word, enthalpy, means heat content or total heat. The term, enthalpy exchanger, may also be used.

Exhaust air – The air from indoors that passed through the energy recovery wheel and is being ducted outdoors.

Heat wheel – This generally describes all rotating devices which transfer only sensible energy.

Media – The corrugated material inside the wheel.

Outdoor air – The fresh outside air that is being drawn in the energy recovery wheel. Once it passes through the wheel it becomes the supply air.

Return air – Air from the indoor space that is pulled through the energy recovery wheel. Once it passes through the wheel it is referred to as exhaust air.

Rotor – The media-filled wheel that rotates. It transfers heat energy and water vapor from one ducted airstream to the other. Often, the rotor will be referred to as a wheel.

Seal – The soft material that closely surrounds the rotor to limit the amount of bypass air around the rotor.

Supply air – Air provided to the indoor space. Outside air that passes through the energy recovery wheel becomes

Pro-Series

supply air.

Unit – Used frequently throughout this manual to mean the energy recovery wheel and attendant components such as cabinets, motors, fans and other parts that work together to make an effective energy recovery product.

Wheel – Refers to the rotating wheel containing the coated media. The stationary framework supporting the wheel is

the wheel cassette.

Figure 3.Figure 3.

Figure 3. Typical Pro-Series unit with

Figure 3.Figure 3.

components highlighted per definitions above.

Receiving & Inspection

Lifting Technique

Upon delivery, confirm that the quantity and model(s) received matches the Bill of Lading. If there is any discrepancy, immediately notify ERV Systems Incorporated.

Inspect the skidded unit(s) for signs of damage. If damage is suspected, sign the Bill of Lading “damaged.” If no visible damage is apparent, the unit should be properly lifted and stored until installation.

While skidded, the Pro-Series unit, models Pro-6 through Pro-50, can be lifted by a forklift using the skid. The Pro-75 and Pro-90 models must be lifted from the skid by the use of spreader bars. Once removed from the skid, lifting must only be performed with spreader bars, cable and hooks. Do not attempt to lift the unit by grasping the hoods.

Note: The packaged unit weighs approximately 100 lbs. more than the net weight, noted below.

ledoM

6-orP 054

01-orP 005 02-orP 055 03-orP 000,1

thgieWteN

).sbl(

When rigging the Pro-Series unit, spreader bars must be used. Padding must be inserted between the straps and the unit to avoid scratching the paint. Lifting holes are provided at four points located on the base perimeter of the unit.

padding

Figure 4.Figure 4.

Figure 4. Correct lifting technique using spreader bars.

Figure 4.Figure 4.

Overall Dimensions

Pro-Series

04-orP 051,1 05-orP 051,1 57-orP 008,1 09-orP 008,1

Storage

If the Pro-Series is to be stored for any time before installation, it must be protected from the weather. Indoor storage is recommended. The unit has openings provided for ducting. These openings make the internal equipment (motors, belts, fans and insulation) vulnerable to inclement weather conditions (prior to installation) and can cause standing water to accumulate inside the enclosure. This is to be absolutely avoided.

L = Overall Length

H = Height

W = Width

ledoM L H W

6-orP 5.96 0.13 0.92

01-orP 5.96 0.13 0.92 02-orP 6.08 4.23 0.73 03-orP 0.69 7.74 0.54 04-orP 5.621 5.15 0.45 05-orP 5.621 5.15 0.45 57-orP 0.341 6.85 6.46 09-orP 0.341 6.85 6.46

Dimensions in inches.

Installation

Installation of the Pro-Series is a relatively simple procedure, but should be undertaken in a methodical fashion, following the directions outlined in this manual.

Note: Prior to starting unit, open access door and;

Remove loose parts shipped inside;

Remove wheel shipping restraint (Pro-30 thru Pro-90 only)

The installation location should be chosen to provide easy, convenient access. As with all mechanical equipment, routine maintenance and inspection is necessary. Choose a site from which connecting duct is visible. Avoid locations that are near or downwind of smoke, fumes or exhaust outlets of other equipment. The front access panel should have clearance space equal to the depth of the unit to allow for service.

Once the installation location is determined, the unit should be skidded and closely examined. Any defects or problems should be reported to ERV Systems Incorporated immediately.

Several ducting arrangements are possible. Make sure your duct plans match the Pro-Series duct opening arrangement. (See Unit Configuration, pg. 5)

The Pro-Series unit can be ordered for indoor or outdoor installation. An outdoor unit is identified by the existence of two hoods that are shipped on top of the unit. It will be necessary to attach the outdoor air intake hood (larger one with filter rack) and the exhaust air outlet

Pro-Series

hood (smaller one with damper) on their designated openings (see figure 6a-d). The indoor unit is identified by a rectangular duct shipped on top of the unit. This indoor intake duct must be installed over the outdoor air intake opening (see figure 6a-d). Use the given alignment holes to place the hood or duct in the correct position.

If the unit is a rooftop unit, it may be installed on a curb. If ERV Systems supplies the curb, it is shipped separately. The curb must be installed before a rooftop Pro-Series unit can be placed. Proper care should be taken to ensure correct placement of the curb before holes are cut for ducting through the roof itself. Effective waterproofing of the rooftop interface is necessary. That means sealing around the roof curb to prevent any leakage into the building or the air ducts. The curb and unit must be installed and operated in a horizontal position.

If the unit is not installed on the roof, then a concrete or paved pad to support the Pro-Series must be provided. The pad must be of sufficient height and located to assure proper water drainage in any weather.

Inspect the interior of the unit for any damage. On the floor inside the unit is the outdoor air metal filter. This filter is to be installed at the outdoor air intake opening after the hood (outdoor Pro-Series only) has been attached. On the Pro-Series 30, 50, and 75 remove wheel shipping restraint. The ERV energy recovery wheel is mounted horizontally inside the Pro-Series. The motor and belt arrangement that turn the wheel are visible next to the wheel at the access panel opening. The motor wires running to the control panel are attached by a quick release disconnect. The quick disconnect must be separated before sliding out the wheel cassette. The wheel cassette need not be moved for installation or hookup, but it can be pulled out for easy maintenance and inspection purposes. When the unit has been placed in its permanent location, ductwork should be brought up to and attached to the unit. Ductwork may be flanged and screwed to the unit face for horizontal connections. Ductwork for a vertical unit should be flanged and gasketed level with the curb to allow the unit weight to form the seal. Penetrations through the unit floor must be avoided to prevent any water penetrating into the cabinet. If the unit has been ordered with electric preheat, it is shipped installed. The main power connection to the unit is made at the electric coil instead of the unit control panel. For the indoor version of the Pro-Series, the electric coil should be externally insulated after installation. On the front right side of the Pro-Series is the unit identification tag. It states the electrical requirements for the unit. (If electric preheat option has been ordered, the unit ID tag is located on the heater.) Make sure the power provided to the installation site matches that required by the unit. Note and verify that voltage/phase/capacity needed and provided are the same, and the line voltage must not vary more than +/- 5%.

Curb Mounting

Outdoor Air In

Supply Air

Exhaust Air Out

Return Air

Unit Configuration

The Pro-Series is generally installed on a curb (unless mounted indoors). The curb ships separately for preinstallation to simplify rigging. The dimensions of the curbs required for the Pro-Series units are listed below.

All Pro-Series configurations have the same curb dimensions. The curb for a Pro-Series unit can be provided by ERV Systems or purchased from a curb manufacturer provided it is designed to support the weight of the ProSeries unit specified in this manual and conforms to the dimensions listed in the table below.

Figure 5.Figure 5.

Figure 5. Curb dimensions.

Figure 5.Figure 5.

The Pro-Series ventilator can be installed in one of four possible configurations depending on the arrangement of the supply and return air openings.

Exhaust Air Out

Outdoor Air In

Supply Air

Figure 6a.Figure 6a.

Figure 6a. H Class configuration with horizontal supply

Figure 6a.Figure 6a.

air and horizontal return air duct arrangement.

Outdoor Air In

Supply Air

Return Air

Exhaust Air Out

Return Air

Pro-Series

Plan View

Curb Detail

Pro-Series

Nailer

Roof Curb

Elevation

ledoM A B C D E

6-orP 1.04 0.52 7.1 0.41 0.3

01-orP 1.04 0.52 7.1 0.41 0.3 02-orP 4.74 0.33 7.1 0.41 0.2 03-orP 6.06 0.14 7.1 0.41 0.3 04-orP 6.47 9.94 7.1 0.41 0.3 05-orP 6.47 9.94 7.1 0.41 0.3 57-orP 6.19 3.06 7.1 0.41 0.3 09-orP 6.19 3.06 7.1 0.41 0.3

Figure 6b.Figure 6b.

Figure 6b. HS Class configuration with horizontal supply

Figure 6b.Figure 6b.

air and vertical return air duct arrangement.

Figure 6c.Figure 6c.

Figure 6c. V Class configuration with vertical supply air

Figure 6c.Figure 6c.

and vertical return air duct arrangement.

Exhaust Air Out

Outdoor Air In

Return Air

Supply Air

Figure 6d.Figure 6d.

Figure 6d. VS Class configuration with vertical supply air

Figure 6d.Figure 6d.

and horizontal return air duct arrangement.

Supply & Exhaust Airflow Dampers

All outdoor Pro-Series units have airflow dampers on the outdoor air intake and exhaust air outlet that are field adjustable.

All indoor Pro-Series units have airflow dampers on the outdoor air intake only. The exhaust air damper is duct mounted, and provided by the contractor.

To adjust the outside airflow damper, turn the unit off and open the access panel. Locate the outside airflow damper actuator inside the unit on the left side. Loosen

the two end stops c and d with a No. 2 Phillips head screwdriver. Move the stops to the desired positions and retighten the screws. To test the correct position of the stops, while depressing the release button tor, move the damper to the fully open and closed position. Readjust the stops as necessary. The actuator will automatically open the damper to the set position whenever the unit is running and will close the damper to the set position when the remote unit start/stop (by others) is off. Note, the actuator needs power to close, therefore it is not recommended that the unit be turned off by disconnecting the power to the unit. This may leave the actuator in a open position, which may not be desirable.

1 EndStop

e on the actua-

Exhaust Hood

Exhaust Damper

Nut/Bolt Stop

Pro-Series

Adjusting Holes

Figure 8. Figure 8.

Figure 8. Diagram of exhaust hood

Figure 8. Figure 8.

damper.

Controls

Basic Package

The basic Pro-Series unit ships with no controls. The standard wiring package provides connections for the starting/stopping of the complete unit, supply fan and the energy wheel. The connections are shipped with factory jumpers installed. Remote control of any of these options can be achieved by removing the correct factory jumper and installing a contact in its place. The contact should be capable of handling 24V power at 2 amps. (See appropriate 1Ø or 3Ø circuit diagram on pages 8 thru 12). It is strongly recommended that a remote unit start/stop contactor (supplied by others) be used to turn the unit on and off. This allows the outdoor air damper to fully close when the unit is off.

Pro-Series

Figure 7.Figure 7.

Figure 7. Location of the outside air damper and

Figure 7.Figure 7.

optional actuator.

To adjust the exhaust airflow damper, turn the unit off and remove the nut/bolt stops on both sides of exhaust hood. Reposition the nut/bolt stops in the desired adjusting holes and retighten. Be sure to use matching adjusting hole on both sides of the exhaust hood. Readjust the stops as necessary to obtain the desired airflow. The exhaust airflow damper will automatically open to the set position when the exhaust fan is on, and close when the exhaust fan is off.

Release

Button

2 EndStop

Optional Electric Preheat Frost Control

For applications where the outdoor conditions do not exceed -10°F and where the indoor design conditions do not exceed 70°F and 25 percent RH, the energy wheel can operate at full capacity and will not frost. For colder design conditions or buildings with higher humidity levels, frosting of the wheel can be prevented by providing a modest amount of preheat to the outdoor air. The amount of preheat required is small and is not intended to raise the outdoor air temperature above the freezing point. It is only necessary to keep the exhaust air temperature above the dew point. This prevents condensation on the wheel so that all the moisture transfer occurs in the vapor phase.

The preheat control option includes a finned tube electric coil mounted on the outdoor air intake of the unit, an SCR controller and a temperature sensor mounted in the outdoor air plenum. The temperature for the controller is set to the minimum temperature of the outdoor air required to prevent condensation at the design indoor temperature and humidity. This is done by plotting a line on the psychrometric chart from the indoor design condition down to the coldest temperature that does not cause the operating line to intersect the saturation curve on the chart. As stated above, for inside conditions of 70°F and 25 percent RH, this temperature is about -10°F.

Optional Stop/Jog Economizer and Wheel Frost Protection (SMX70 Controller)

The stop/jog economizer option is used during moderate outdoor air temperatures to stop the recovery wheel. The jog function is included to allow the wheel to rotate periodically to self-clean.

When the outdoor temperature is between 55°F (the cooling coil supply air temperature) and 75°F (the space return air temperature) the wheel will raise the outdoor air temperature which will add slightly to the space sensible load. At the same time, if the outdoor humidity level is higher than the space humidity level, the recovery wheel will dehumidify the fresh air slightly reducing the space latent load. If the local climate is such that these intermediate temperature days occur mostly at moderate humidity conditions, the stop/jog economizer can eliminate the heating of the outdoor air and provide some free cooling to the space.

The stop/jog economizer consists of a temperature sensor and a circuit board with dip switch selection of temperature and stop/jog times. When the outdoor temperature is in the range between the two setpoints, the timer relay operates the wheel for approximately 30 seconds in every 30 minutes.

The SMX-70 board also has the ability to put the wheel in stop/jog mode when the outdoor air temperature drops below a preset value. This is a lower cost option than the electric preheat. It also has the disadvantage in supplying untreated outdoor air into the ventilation system whenever the stop/jog activates.

ROTATION DETECTOR TIMES JUMPER 1-2: SMALL = 20s 2-3: BIG = 10 min.

Optional Rotation Detector Sensor

The SMX70 stop/jog economizer board is supplied with a motion detector to monitor the rotation of the energy recovery wheel. The sensor is a hall effect device that senses the passage of a small magnet on the perimeter of the rotor. When the sensor fails to register any wheel rotation - it requires a signal every 20 seconds or 10 minutes depending on the mode of operation - it energizes the alarm terminal (24 VAC, .3 amp max) of the SMX70 board. This can be used to operate a relay (to be supplied by others) for remote indication of the alarm. The sensor will not create a false alarm when the SMX70 controller is in stop/jog mode.

The alarm resets itself once the wheel begins to turn or the system is shut off and restarted.

Please note that the triac output for the alarm signal requires a load, such as a contactor coil, to operate. This output may not register on a digital multimeter without the load, or may cause a lamp with no limiting resistor to light dimly.

STOP/JOG TEMPERATURE SETPOINTS (DEG. F)

DDDDDDDD 40 UDDDDDDD 41 DUDDDDDD 42 UUDDDDDD 43 DDUDDDDD 44 UDUDDDDD 45 DUUDDDDD 46 UUUDDDDD 47 DDDUDDDD 48 UDDUDDDD 49 DUDUDDDD 50 UUDUDDDD 51 DDUUDDDD 52 UDUUDDDD 53

FROST SETPOINTS (DEG.F)

DDDDDDDD DISABLED UDDDDDDD -14 DUDDDDDD -13 UUDDDDDD -12 DDUDDDDD -11 UDUDDDDD -10 DUUDDDDD - 9 UUUDDDDD - 8 DDDUDDDD - 7

OFF/ON TIME*

ON TIME OFF TIME (SECONDS) (MINUTES) 5 DDDD DDDD 0.1 (TEST) 10 UDDD UDDD 10 15 DUDD DUDD 20 20 UUDD UUDD 30 25 DDUD DDUD 40 30 UDUD UDUD 50 35 DUUD DUUD 60 40 UUUD UUUD 70 45 DDDU DDDU 80 50 UDDU UDDU 90 55 DUDU DUDU 100 60 UUDU UUDU 110 65 DDUU DDUU 120 70 UDUU UDUU 130 75 DUUU DUUU 140 80 UUUU UUUU 150 *ON TIME IS SWITCH POSITION 1,2,3,4 *OFF TIME IS SWITCH POSITION 5,6,7,8

DUUUDDDD 54 UUUUDDDD 55 DDDDUDDD 56 UDDDUDDD 57 DUDDUDDD 58 UUDDUDDD 59 DDUDUDDD 60 UDUDUDDD 61 DUUDUDDD 62 UUUDUDDD 63 DDDUUDDD 64 UDDUUDDD 65 DUDUUDDD 66 UUDUUDDD 67

UDDUDDDD - 6 DUDUDDDD - 5 UUDUDDDD - 4 DDUUDDDD - 3 UDUUDDDD - 2 DUUUDDDD - 1 UUUUDDDD 0 DDDDUDDD 1

SMX70 CONTROLLER

Figure 10Figure 10

Figure 10. SMX70 Controller settings.

Figure 10Figure 10

LOW

UDDDUDDD 2 DUDDUDDD 3 UUDDUDDD 4 DDUDUDDD 5 UDUDUDDD 6 DUUDUDDD 7 UUUDUDDD 8 DDDUUDDD 9 UDDUUDDD 10

DDUUUDDD 68 UDUUUDDD 69 DUUUUDDD 70 UUUUUDDD 71 DDDDDUDD 72 UDDDDUDD 73 DUDDDUDD 74 UUDDDUDD 75 DDUDDUDD 76 UDUDDUDD 77 DUUDDUDD 78 UUUDDUDD 79 DDDUDUDD 80

12345678

HIGH FROST

LOW

TIME

HIGH

Wheel Only Frost Protection Typically Disabled

Upper Stop/Jog Economizer Setpoint (Typically 75∞F)

Lower Stop/Jog Economizer Setpoint (Typically 55∞F)

Stop/Jog Times (Typically 30s on, 30 minutes off.)

DOWN

Pro-Series

ALARM TERMINAL

Figure 9Figure 9

Figure 9. SMX70 controller as installed on the electric

Figure 9Figure 9

panel.

Thermostat Frost Protection

A lower cost solution to frost protection is to use a thermostat to turn the entire ventilation unit off during periods when the air is below the calculated frosting temperature. This should only be used in non-critical ventilation applications as no outdoor air will be supplied when the unit is switched off by the thermostat.

3Ø Circuit Diagram, Pro-6

Line Power

480/240-208/3/60

Disconnect (by others) *See Note 2

USE COPPER

CONDUCTORS

ONLY

Pro-Series

Optional Stop/Jog Controller: Model SMX70

Optional Motion Detector Sensor 310-1875 Assembly (observe polarity)

Optional Thermostat Frost Control

RED

BLK

GRN

Breaker or Fuse (by others) *See Note 2

*See Note 4

T2 T1

GRN

L1 ALARM WHEEL

Aux. Rotation Alarm (not used) (See Note 3)

1CR

2CR

208/240/480 - 24VAC 40VA UL Cl 2 XFMR

Remote Unit Start/Stop (by others)

Thermistor Sensor 310-1865 Assembly

*See Note 4,5

Wheel Remote Start/Stop

(factory jumpered if optional

SMX70 controller not included)

Notes:

1) All dashed lines indicate field wiring unless otherwise noted.

2) If electric preheater is ordered, the power wiring is factory installed from electric preheater to PRO Panel and includes a disconnect at the preheater and a breaker in the PRO Panel. (See specifications and circuit diagram on electric preheater for information on sizing and connecting supply power.)

Supply Fan

Motor

Exhaust Fan

Motor

Wheel

Motor

4 2

3) Alarm output: One triac-switch to drive a contactor (by others), 24VAC, 0.3 amps max.

4) If no options are ordered, terminals 1 & 2 are shipped with jumper installed.

5) Remote unit start/stop (by others) may be any isolated contact, to prevent interconnection of class 2 outputs, suitable for 24 VAC @ 2 amps.

Supply & Exhaust Fan Remote Start/Stop (by others, factory jumpered)

Optional Outdoor Air Damper Actuator: Belimo LM24

4 1 2

1CR

2CR

LM24

BELIMO

COM

1+3

BLK

WHTRED

Tightening Torque

For

Slotted Screws

AWG Size

18-10

6-3

IN-LB

20 25 35

3Ø Circuit Diagram, Pro-10

Line Power

480/240-208/3/60

Disconnect (by others) *See Note 2

Optional Thermostat Frost Control

*See Note 4

1CR

2CR

3CR

208/240/480 - 24VAC 40VA UL Cl 2 XFMR

Remote Unit Start/Stop (by others)

*See Note 4,5

Wheel Remote Start/Stop

(factory jumpered if optional

SMX70 controller not included)

Notes:

All dashed lines indicate field wiring unless

1) otherwise noted.

Electric Preheat: If electric preheater is ordered, the power wiring is factory installed from electric preheater to PRO Panel and includes a disconnect

Supply Fan Motor

Exhaust Fan Motor

Wheel Motor

at the preheater. (See specifications and circuit diagram on electric preheater for information on sizing and connecting supply power.)

Alarm output: One triac-switch to drive a

3) contactor (by others), 24VAC, 0.3 amps max.

If no options are ordered, terminals 1 & 2

are shipped with jumper installed.

Remote unit start/stop (by others) may be any isolated contact, to prevent interconnection of class 2 outputs, suitable for 24 VAC @ 2 amps.

Supply & Exhaust Fan Remote Start/Stop (by others, factory jumpered)

USE COPPER

CONDUCTORS

ONLY

1CR

2CR

3CR

Pro-Series

Optional Stop/Jog Controller: Model SMX70

RED

BLK

GRN

Optional Motion Detector Sensor 310-1875 Assembly (observe polarity)

Tightening Torque

For

Slotted Screws

AWG Size

18-10

6-3

IN-LB

GRN

ALARM

WHEEL

20 25 35

Thermistor Sensor 310-1865 Assembly

Aux. Rotation Alarm (not used) (See Note 3)

Optional Outdoor Air Damper Actuator: Belimo

BELIMO

4 2

4 1 2

COM

BLK

RED

WHT

3Ø Circuit Diagram, Pro-20 through Pro-90

Line Power

480/240-208/3/60

Disconnect (by others) *See Note 2

USE COPPER

CONDUCTORS

ONLY

Notes:

All dashed lines indicate field wiring unless

208/240/480 - 24VAC 75VA UL Cl 2 XFMR

1CR

2CR

3CR

Supply Fan Motor

Exhaust Fan Motor

Wheel Motor

otherwise noted.

Electric Preheat: If electric preheater is ordered, the power wiring is factory installed from electric preheater to PRO Panel and includes a disconnect at the preheater. (See specifications and circuit diagram on electric preheater for information on sizing and connecting supply power.)

Alarm output: One triac-switch to drive a

3) contactor (by others), 24VAC, 0.3 amps max.

If no options are ordered, terminals 1 & 2 are shipped with jumper installed.

Remote unit start/stop (by others) may be any isolated contact, to prevent interconnection of class 2 outputs, suitable for 24 VAC @ 3.5 amps.

Time Delay Relay included on PRO-30, PRO-40 PRO-50, PRO-75, and PRO-90 if optional outdoor air damper actuator is included. Otherwise, terminal 3 wired to 1CR.

Supply Fan Remote Start/Stop (by others, factory jumpered)

Time Delay Relay *See Note 7

Pro-Series

Optional Stop/Jog Controller: Model SMX70

Optional Motion Detector Sensor 310-1875 Assembly (observe polarity)

AWG Size

Tightening Torque

Slotted Screws

18-10

6-3

Optional Thermostat Frost Control

RED BLK GRN

For

IN-LB

20 25 35

*See Note 4

T2 T1

GRN

ALARM

WHEEL

Optional Trane ICS Relay

*See Note 4,6

Remote Unit Start/Stop (by others)

Aux. Rotation Alarm (not used) (See Note 3)

*See Note 4,5

Wheel Remote Start/Stop

(factory jumpered if optional

SMX70 controller not included)

Thermistor Sensor 310-1865 Assembly

4 2

Optional Outdoor Air Damper Actuator: Belimo

4 1 2

1CR

2CR

3CR

BELIMO

+COM

1 2

WHT

BLK

RED

Line Power

240-208/1/60

Disconnect (by others) *See Note 2

1Ø Circuit Diagram, Pro-6

USE COPPER

CONDUCTORS

ONLY

Breaker or Fuse (by others) *See Note 2

1CR

2CR

208/240 - 24VAC 40VA UL Cl 2 XFMR

Supply Fan Motor

Exhaust Fan Motor

Wheel Motor

Supply & Exhaust Fan Remote Start/Stop (by others, factory jumpered)

Notes:

1) All dashed lines indicate field wiring unless otherwise noted.

3) Alarm output: One triac-switch to drive a contactor (by others), 24VAC, 0.3 amps max.

4) If no options are ordered, terminals 1 & 2 are shipped with jumper installed.

5) Remote unit start/stop (by others) may be any isolated contact, to prevent interconnection of class 2 outputs, suitable for 24 VAC @ 2 amps.

Pro-Series

Optional Thermostat Frost Control

Optional Stop/Jog Controller: Model SMX70

GRN

Optional Motion Detector Sensor 310-1875 Assembly (observe polarity)

Tightening Torque

For

Slotted Screws

AWG Size

18-10

6-3

RED BLK

IN-LB

*See Note 4

Remote Unit Start/Stop (by others)

(factory jumpered if optional

SMX70 controller not included)

Thermistor Sensor 310-1865 Assembly

Aux. Rotation Alarm (not used) (See Note 3)

GRN

ALARM

WHEEL

*See Note 4,5

Wheel Remote Start/Stop

4 2

1CR

2CR

Optional Outdoor Air Damper Actuator: Belimo LM24

LM24

BELIMO

COM

BLK

RED

WHT

1Ø Circuit Diagram, Pro-10 through Pro-50

Line Power

240-208/1/60

Disconnect (by others) *See Note 2

1CR

2CR

Supply Fan Motor

Exhaust Fan Motor

USE COPPER

CONDUCTORS

ONLY

Notes:

1) All dashed lines indicate field wiring unless otherwise noted.

2) If electric preheater is ordered, the power wiring is factory installed from electric preheater to PRO Panel and includes a disconnect at the preheater. (See specifications and circuit diagram on electric preheater for information on sizing and connecting supply power.)

3) Alarm output: One triac-switch to drive a contactor (by others), 24VAC, 0.3 amps max.

4) If no options are ordered, terminals 1 & 2 are shipped with jumper installed.

5) Remote unit start/stop (by others) may be any isolated contact, to prevent interconnection of class 2 outputs, suitable for 24 VAC @ 3.5 amps (PRO-10: 2 amps).

6) Time Delay Relay included on PRO-30, PRO-40, and PRO-50 if optional outdoor air damper actuator is included. Otherwise, terminal 3 wired to 1CR.

Pro-Series

Optional Stop/Jog Controller: Model SMX70

Optional Motion Detector Sensor 310-1875 Assembly (observe polarity)

Optional Thermostat Frost Control

RED

BLK

GRN

*See Note 4

Remote Unit Start/Stop (by others)

GRN

ALARM

WHEEL

208/240 - 24VAC 75VA UL Cl 2 XFMR (PRO-10: 40VA)

*See Note 4,5

Wheel Remote Start/Stop

(factory jumpered if optional

SMX70 controller not included)

Thermistor Sensor 310-1865 Assembly

Aux. Rotation Alarm (not used) (See Note 3)

3CR

Wheel

Motor

4 2

Supply Fan Remote Start/Stop (by others, factory jumpered)

Time Delay Relay *See Note 6

1CR

2CR

3CR

Optional Outdoor Air Damper Actuator: Belimo LM24

LM24

BELIMO

COM +

BLK

WHT2RED

Tightening Torque

For

Slotted Screws

AWG Size

18-10

6-3

IN-LB

3Ø Electric Preheat Frost Control Circuit Diagram

remote duct stat

with set point adjuster

Line Power

208-240/480/3/60

to main panel

on Pro-Series unit

fuse

cutout

Solitech

master controller

airflow switch SC

manual cutoff

delta- or wye-connected

electric heat coils

Pro-Series

remote duct stat

with set point adjuster

Line Power

208-240/1/60

fuse

to main panel

on Pro-Series unit

1Ø Electric Preheat Frost Control Circuit Diagram

cutout

Solitech

master controller

airflow switch SC

electric heat coil

Electric Preheat Layout

EZISTINU W H L A B C

6-orP 4.42 0.9 0.41 0.02 0.1 0.1

01-orP 4.42 0.9 0.41 0.02 0.1 0.1 02-orP 1.13 0.11 0.41 0.02 0.1 0.2 03-orP 1.93 0.61 0.02 0.04 0.1 0.2 04-orP 1.94 0.71 0.02 0.04 0.1 0.2 05-orP 1.94 0.71 0.02 0.04 0.1 0.2 57-orP 0.65 0.42 0.02 0.04 0.3 0.2 09-orP 0.65 0.42 0.02 0.04 0.3 0.2

All dimensions in inches.

Pro-Series

HOOD

W+1"

HEAT SINK

ELECTRIC PANEL

Pro-Series

AIR FLOW

PLAN VIEW

AIR FLOW

SIDE VIEW

Wheel Cassette

The wheel cassette can be serviced through the front panel. The cassette can be slid out for easy access. To remove the cassette, unplug the leads to the wheel drive motor, and remove the (2) tek screws located near the opening. This will then allow you to pull the cassette out of the unit through the access door. If the unit is equipped with a rotation sensor, it too must be removed prior to sliding the cassette out.

ELEVATION

1/2" deflection

MOTOR

Pro-Series

Tek ScrewTek Screw

MODEL

LINKBELT TYPE

BELT LENGTH

Pro-6

4L/"A" 4L/"A" 4L/"A" 4L/"A" 4L/"A" 4L/"A"

65"

Pro-10 Pro-20 Pro-30

PLAN VIEW

81" 108" 134"

Pro-40 Pro-50

164" 164"

Pro-75 Pro-90

4L/"A" 4L/"A"

200" 200"

Service

The Pro-Series module has a large access panel on the front of the unit. All maintenance can be performed through this panel. The unit should be installed with clearance in front of the unit at least equal to the unit depth to assure adequate access.

•All key components including fans and wheel cassette are removable through the service panel.

•The rotor is supported by permanently lubricated wheel bearings for minimal maintenance and long life.

•Electrical panels utilize breakers to eliminate the need for fuses (Pro-20 thru Pro-90 only).

•Fluted media structure provides for laminar flow through the wheel thereby avoiding media plugging due to dust and debris.

•Intake hood/filter limits snow and rain from entering the unit.

Maintenance

Seals – Surrounding the rim of the wheel is a brush seal. Do not tamper with this seal. No maintenance of the seal is required.

Media – For normal inspection and maintenance, the wheel cassette may be pulled out (like a drawer) of the metal enclosure of the unit. (See Figure 12.)

Because ERV Systems’ heat wheels use laminar flow technology to resist plugging and the accumulation of dust particles, cleaning is usually not necessary. Constant back-flushing occurs due to incoming and outgoing air streams that move through media flutes to keep them clean. As the media moves constantly from one airstream to the other, most dirt is blown away. Some applications may require occasional rotor cleaning; those receiving a great particle load, for example. Under these circumstances, the media may be cleaned with a vacuum, pressurized air or hot water. However, detergents or solvents are not recommended. They may degrade the materials used to bind the desiccant to the aluminum surface in the media.

trial grade aluminum mesh filters. The filters can be removed and washed. (See Figure 11.) We suggest that the filters be washed or replaced a minimum of once every four months. Replacement filters are readily available through ERV Systems, locally through HVAC supply distributors or McMaster-Carr.

Pro-Series

igurigur

igur

igurigur

Filters – The Pro-Series utilizes one-inch deep indus-

e 11. e 11.

e 11. Replacing the return air filter.

e 11. e 11.

riAylppuS riAnruteR

6-orP 52x61x1)1( 52x61x1)1(

01-orP 52x61x1)1( 52x61x1)1(

02-orP 02x61x1)2( 02x61x1)2(

03-orP 02x02x1)3( 02x02x1)2(

04-orP 52x61x1)4( 52x61x1)3(

05-orP 52x61x1)4( 52x61x1)3(

57-orP 02x61x1)6( 02x61x1)6(

09-orP 02x61x1)6( 02x61x1)6(

Figure 12.Figure 12.

Figure 12. All key components including fans and wheel

Figure 12.Figure 12.

cassette are removable through the service panel.

Rotation detector sensor must be removed from its holder prior to sliding the wheel cassette out!

Wheel motor quick release disconnect

Figure 13.Figure 13.

Figure 13. Prior to sliding out the wheel cassette the

Figure 13.Figure 13.

wheel motor quick release must be disconnected and the rotation detector sensor must be unmounted.

Belts – The wheel drive system utilizes a PowerTwist Plus™ belt. Periodic adjustment of the belt will be necessary. We suggest the belt be checked for sufficient tension at a minimum of once every six months. Take care to follow the directions on the following pages.

Fan Bearings (Pro-75 and Pro-90 only) – The fan bearings for the Pro-75 and Pro-90 require lubrication at a regular interval. Hours of operation, temperature and surrounding conditions will affect the lubrication frequency required. Therefore, when applying grease, observe the condition of the grease expelled from the bearings and note the amount of grease used. Both observations will suggest whether or not the lubrication schedule should be increased or decreased. Start with an initial monthly interval, and use a high quality NLGI No. 2, lithium soap grease with petroleum oil.

Also note that all bearings are originally filled with grease at the factory. When the fans are started, the bearings may discharge excess grease though the seals for a short period of time. If so, it is not necessary to replace this initial discharge. Lubricate bearings prior to extended shutdown or storage and rotate the shaft monthly to aid corrosion protection.

Disassembly

1. Hold belt upside down. Bend back as far as possible: hold with one hand. Twist one tab 90° parallel with slot.

2. Pull end of link over tab.

Power Twist® Plus™ V-Belts

Measuring the Belt

• Pull belt tight around sheaves to check hand tight length, overlapping the last two tabs with two holes in matching links as shown in Figure 14.

• Count the number of links and remove one link for every 24 of O/3L, A/4L and B/5L sections and one link for every 20 of C section.

This gives the correct installed belt length and will ensure optimum belt tension when running. Note: Every tenth link is designated with an arrow.

For multiple belt drives, ensure that each belt has the same number of links.

3. Rotate belt end with tab 90°.

Assembly

1. Hold belt with tabs pointing outward.

3. Flex belt further and insert second tab through end link by twisting tab with thumb.

4. Pull belt end through two links.

Pro-Series

2. Place end tab through two links at once.

4. Ensure tab returns to position across belt. Reverse belt so tabs run inside.

Figure 14.Figure 14.

Figure 14.

Figure 14.Figure 14.

Note:Note:

Note: Turn belt inside out (as shown above) to ensure

Note:Note: easy assembly and disassembly.

Installation

1. Turn belt with tabs to the inside before installing.

2. Determine direction of drive rotation.

3. Align belt directional arrow with drive rotation.

4. Fit belt in nearest groove of smaller sheave.

5. Roll belt onto larger sheave, turning the drive slowly. Belt may seem very tight; this is okay. DO NOT jog motor.

6. Check to see all tabs are still in their correct position and are not twisted out of alignment.

7. For multiple belt drives, work belt from groove to groove. On particularly wide drives, it may be easier to install half the belts from the inboard side and half from the outboard. Note: With drive ratios around 1:1, it may be necessary to add back one link to allow belts to be rolled on. This does not apply if using Alternative Installation Method.

Alternative installation Method

1. Set motor to mid-position of adjustment range and mark base clearly.

2. Determine required belt length as in “Measuring Belt Length.”

3. Push motor forward to minimum center distance.

4. Install belts as in “Installation.”

5. Pull motor back to previously marked mid-position.

Retensioning

Like all high-performance V-belts, PowerTwist® Plus™ V-Belts require the maintenance of correct drive tension to operate

Pro-Series

efficiently. Experience indicates that drive tension should be checked after 24 hours running at full load. Retensioning may be necessary depending on the severity of the drive. Any initial belt stretch is then taken up. Subsequently, belt tension should be checked periodically and adjusted when necessary.

Fenner Drives 311 W. Stiegel St. Manheim, PA 17545-1010

800-243-3374 FAX 717-665-2649

Columbia, MO 65205-1797

PO Box 1797

(573) 886-5400

(573) 886-5401 fax

www.ervsystems.com

sales@ervsystems.com

OG 01.3 0704 500 G

ERV Systems Pro-Series, Pro-6, Pro-10, Pro-20, Pro-30 Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual