B&K Pro10 Specifications

High Performance Ventilation Equipment
Pro-Series
Energy Recovery Ventilators
Airflow capacities from 500 to 10,000 cfm
Operations Guide
Pro -Series
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Table of Contents
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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
2001-2004 ERV Systems®. All rights reserved.
©
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.
i
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Pro-Series
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Model Description
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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.
PRO20H-5RN2AA
Serial No. :
1002/15250-000
Tag :
9700598
CONFORMS TO
UL STD 1812
ERU-1
Volts :
240
Exhaust Blower Motor :
Freg. :
60
Supply Blower Motor :
Phase :
3
Amps :
MFG Date :
HP
1.50 HP
N/A
2.8
Amps
5.6
Amps
Amps
kW
Min. Supply Circuit Ampacity :
13.5
Max. Overcurrent Protection :
25
Amps
Use Time-Delay Fuses or HACR-Type Circuit Breakers
Manufactured under U.S Patents 4,769,053 & 6,016,710
Figure 2. Typical Pro-Series nameplate with electrical
data.
Pro -Series
Suitable For Outdoor Use
10.00
May, 2001
Preheater :
0.75
Exhaust Air
90°F, 99gr/lb(C)
21°F, 9gr/lb (H)
Outdoor Air
95°F, 110gr/lb (C)
5°F, 4gr/lb(H)
Supply Air
80°F, 76gr/lb (C)
54°F, 25gr/lb (H)
PO Box 1797 Columbia, MO 65205-1797
(573) 886-5400 FAX(573) 886-5401
Model :
Return Air
75°F, 65gr/lb (C)
70°F, 32gr/lb (H)
Figure 1. An inside view of the Pro-Series Preconditioner
with typical operating temperatures during the cooling (C)
and heating (H) season respectively.
1
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Definitions
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
1 Adsorption – The physical bonding of water vapor on the surface of the desiccant.
2 Cassette – The framework supporting the wheel. (See also Wheel.)
3 Desiccant – A naturally occurring or man-made material with a high affinity for water vapor. ERV uses a desiccant
material which minimizes cross contamination.
4 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.
5 Exhaust air – The air from indoors that passed through the energy recovery wheel and is being ducted outdoors.
6 Heat wheel – This generally describes all rotating devices which transfer only sensible energy.
Pro-Series
7 Media – The corrugated material inside the wheel.
8 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.
9 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.
10 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.
11 Seal – The soft material that closely surrounds the rotor to limit the amount of bypass air around the rotor.
12 Supply air – Air provided to the indoor space. Outside air that passes through the energy recovery wheel becomes
supply air.
13 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.
14 Wheel – Refers to the rotating wheel containing the coated media. The stationary framework supporting the wheel is
the wheel cassette.
Figure 3. Typical Pro-Series unit with
components highlighted per definitions above.
2
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Receiving & Inspection
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Lifting Technique
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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.
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.
Pro -6
450
Pro -10
500
Pro -20
550
Pro -30
1,000
Pro -40
1,150
Pro -50
1,150
Pro -75
1,800
Pro -90
1,800
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Storage
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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.
Figure 4. Correct lifting technique using spreader bars.
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Overall Dimensions
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
L = Overall Length
H = Height
Net Weight
(lbs.)
Pro -Series
Model
padding
idth
W=W
Model
L
H
W
Pro -6
69.5
31.0
29.0
Pro -10
69.5
31.0
29.0
Pro -20
80.6
32.4
37.0
Pro -30
96.0
47.7
45.0
Pro -40
126.5
51.5
54.0
Pro -50
126.5
51.5
54.0
Pro -75
143.0
58.6
64.6
Pro -90
143.0
58.6
64.6
Dimensions in inches.
3
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Installation
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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.
Pro-Series
Note:
4
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
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%.
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Curb Mounting
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Unit Configuration
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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.
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
Return Air
Supply Air
Figure 5. Curb dimensions.
Figure 6a. H Class configuration with horizontal supply
air and horizontal return air duct arrangement.
A
C
Exhaust Air Out
Outdoor Air In
Supply Air
Return Air
Figure 6b. HS Class configuration with horizontal supply
air and vertical return air duct arrangement.
Plan View
Curb Detail
Pro-Series
Exhaust Air Out
E
Pro -Series
B
Outdoor Air In
Nailer
D
Supply Air
Return Air
Figure 6c. V Class configuration with vertical supply air
and vertical return air duct arrangement.
Roof Curb
Elevation
Model
A
B
C
D
E
Pro -6
40.1
25.0
1.7
14.0
3.0
Pro -10
40.1
25.0
1.7
14.0
3.0
Pro -20
47.4
33.0
1.7
14.0
2.0
Pro -30
60.6
41.0
1.7
14.0
3.0
Pro -40
74.6
49.9
1.7
14.0
3.0
Pro -50
74.6
49.9
1.7
14.0
3.0
Pro -75
91.6
60.3
1.7
14.0
3.0
Pro -90
91.6
60.3
1.7
14.0
3.0
Exhaust Air Out
Outdoor Air In
Return Air
Supply Air
Figure 6d. VS Class configuration with vertical supply air
and horizontal return air duct arrangement.
5
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Supply & Exhaust Airflow Dampers
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Exhaust Hood
Exhaust Damper
Nut/Bolt Stop
Pro-Series
Pro-Series
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 e on the actuator, 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
Figure 8. Diagram of exhaust hood
damper.
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Controls
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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.
Optional Electric Preheat Frost Control
2 EndStop
3 Release
Button
Figure 7. Location of the outside air damper and
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.
6
Adjusting Holes
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.
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
DUUUDDDD 54
UUUUDDDD 55 LOW
DDDDUDDD 56
UDDDUDDD 57
DUDDUDDD 58
UUDDUDDD 59
DDUDUDDD 60
UDUDUDDD 61
DUUDUDDD 62
UUUDUDDD 63
DDDUUDDD 64
UDDUUDDD 65
DUDUUDDD 66
UUDUUDDD 67
FROST SETPOINTS (DEG.F)
HIGH FROST
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
UDDDUDDD
DUDDUDDD
UUDDUDDD
DDUDUDDD
UDUDUDDD
DUUDUDDD
UUUDUDDD
DDDUUDDD
UDDUUDDD
2
3
4
5
6
7
8
9
10
12345678
Wheel Only Frost Protection
Typically Disabled
Upper Stop/Jog Economizer
Setpoint (Typically 75∞F)
LOW
DDDDDDDD DISABLED
UDDUDDDD - 6
UDDDDDDD -14
DUDUDDDD - 5
DUDDDDDD -13
UUDUDDDD - 4
UUDDDDDD -12
DDUUDDDD - 3
DDUDDDDD -11
UDUUDDDD - 2
UDUDDDDD -10
DUUUDDDD - 1
DUUDDDDD - 9
UUUUDDDD 0
UUUDDDDD - 8
DDDDUDDD 1
DDDUDDDD - 7
OFF/ON TIME*
ROTATION
DETECTOR
TIMES JUMPER
1-2: SMALL = 20s
2-3: BIG = 10 min.
DDUUUDDD 68
UDUUUDDD 69
DUUUUDDD 70
UUUUUDDD 71
DDDDDUDD 72
UDDDDUDD 73
DUDDDUDD 74
UUDDDUDD 75 HIGH
DDUDDUDD 76
UDUDDUDD 77
DUUDDUDD 78
UUUDDUDD 79
DDDUDUDD 80
Lower Stop/Jog Economizer
Setpoint (Typically 55∞F)
Stop/Jog Times
(Typically 30s on,
30 minutes off.)
Pro -Series
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.
Optional Rotation Detector Sensor
TIME
Optional Stop/Jog Economizer and Wheel
Frost Protection (SMX70 Controller)
UP
DOWN
SMX70 CONTROLLER
Figure 10
10. SMX70 Controller settings.
Thermostat Frost Protection
ALARM TERMINAL
Figure 9
9. SMX70 controller as installed on the electric
panel.
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.
7
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
3Ø Circuit Diagram, Pro-6
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Line Power
480/240-208/3/60
USE COPPER
CONDUCTORS
ONLY
Disconnect (by others)
*See Note 2
Breaker or Fuse (by others)
*See Note 2
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.)
1CR
H3
M
4) If no options are ordered, terminals 1 & 2
are shipped with jumper installed.
1CR
H2
Pro-Series
3) Alarm output: One triac-switch to drive a
contactor (by others), 24VAC, 0.3 amps max.
Supply Fan
Motor
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.
M
Exhaust Fan
Motor
M
Wheel
Motor
1CR
H1
2CR
H3
2CR
H2
2CR
H1
H2
208/240/480 - 24VAC
40VA UL Cl 2 XFMR
Supply & Exhaust Fan Remote Start/Stop
(by others, factory jumpered)
H1
1
Optional Thermostat Frost Control
*See Note 4
2
3
2
5
4
1CR
4
2CR
1
Remote Unit Start/Stop (by others)
*See Note 4,5
Wheel Remote Start/Stop
(factory jumpered if optional
SMX70 controller not included)
Optional Stop/Jog Controller:
Model SMX70
2
5
4
Optional Outdoor Air Damper Actuator:
Belimo LM24
Thermistor Sensor
310-1865 Assembly
RED
BLK
GRN
LM24
T2
4
2
ALARM
5
WHEEL
Optional
Motion Detector Sensor
310-1875 Assembly (observe polarity)
COM
Aux. Rotation Alarm (not used)
(See Note 3)
Tightening Torque
For
Slotted Screws
8
BELIMO
T1
GRN
L1
AWG Size
IN-LB
18-10
20
8
25
6-3
35
4
1
2
+
+
1
2
3
BLK
RED
WHT
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
3Ø Circuit Diagram, Pro-10
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
USE COPPER
CONDUCTORS
ONLY
Line Power
480/240-208/3/60
Disconnect (by others)
*See Note 2
Notes:
1) All dashed lines indicate field wiring unless
otherwise noted.
1CR
H3
M
Supply Fan
Motor
1CR
H2
2) 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.)
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.
2CR
H3
M
Exhaust Fan
Motor
M
Wheel
Motor
2CR
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.
H1
3CR
Pro -Series
H3
3CR
H2
3CR
H1
H2
Supply & Exhaust Fan Remote Start/Stop
(by others, factory jumpered)
208/240/480 - 24VAC
40VA UL Cl 2 XFMR
H1
1
2
3
2
Optional Thermostat Frost Control
*See Note 4
4
2CR
2
1
4
1CR
5
4
3CR
Remote Unit Start/Stop (by others)
*See Note 4,5
Wheel Remote Start/Stop
(factory jumpered if optional
SMX70 controller not included)
2
5
4
Optional Outdoor Air Damper Actuator:
Belimo
Optional Stop/Jog Controller:
Model SMX70
Thermistor Sensor
310-1865 Assembly
RED
BLK
GRN
BELIMO
T2
T1
GRN
L1
4
2
ALARM
5
WHEEL
Optional
Motion Detector Sensor
310-1875 Assembly (observe polarity)
COM
Aux. Rotation Alarm (not used)
(See Note 3)
+
+
1
2
3
BLK
RED
WHT
4
1
2
Tightening Torque
For
Slotted Screws
AWG Size
IN-LB
18-10
20
8
25
6-3
35
9
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
3Ø Circuit Diagram, Pro-20 through Pro-90
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
Line Power
480/240-208/3/60
USE COPPER
CONDUCTORS
ONLY
Disconnect (by others)
*See Note 2
Notes:
1) All dashed lines indicate field wiring unless
otherwise noted.
2) 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.)
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.
6) 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.
1CR
H3
1CR
H2
M
Supply Fan
Motor
M
Exhaust Fan
Motor
M
Wheel
Motor
1CR
H1
2CR
H3
2CR
H2
2CR
Pro-Series
H1
3CR
H3
3CR
H2
3CR
H1
H2
Supply Fan Remote Start/Stop
(by others, factory jumpered)
208/240/480 - 24VAC
75VA UL Cl 2 XFMR
Time Delay Relay
*See Note 7
H1
1
3
2
2
Optional Thermostat Frost Control
*See Note 4
4
1CR
4
2CR
1
2
5
Optional Trane ICS Relay
*See Note 4,6
4
3CR
Remote Unit Start/Stop (by others)
*See Note 4,5
Wheel Remote Start/Stop
(factory jumpered if optional
SMX70 controller not included)
2
5
4
Optional Outdoor Air Damper Actuator:
Belimo
Optional Stop/Jog Controller:
Model SMX70
Thermistor Sensor
310-1865 Assembly
RED
BLK
GRN
T1
GRN
L1
4
2
ALARM
5
WHEEL
Optional
Motion Detector Sensor
310-1875 Assembly (observe polarity)
COM
Aux. Rotation Alarm (not used)
(See Note 3)
Tightening Torque
For
Slotted Screws
10
BELIMO
T2
AWG Size
IN-LB
18-10
20
8
25
6-3
35
4
1
2
+
+
1
2
3
BLK
RED
WHT
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
1Ø Circuit Diagram, Pro-6
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Line Power
240-208/1/60
USE COPPER
CONDUCTORS
ONLY
Disconnect (by others)
*See Note 2
Breaker or Fuse (by others)
*See Note 2
H2
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.)
1CR
M
1CR
H1
3) Alarm output: One triac-switch to drive a
contactor (by others), 24VAC, 0.3 amps max.
Supply Fan
Motor
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.
Exhaust Fan
Motor
M
Wheel
Motor
Pro-Series
M
2CR
H2
2CR
H1
Supply & Exhaust Fan Remote Start/Stop
(by others, factory jumpered)
208/240 - 24VAC
40VA UL Cl 2 XFMR
1
Optional Thermostat Frost Control
*See Note 4
2
3
2
5
4
1CR
4
2CR
1
Remote Unit Start/Stop (by others)
*See Note 4,5
2
4
5
Wheel Remote Start/Stop
(factory jumpered if optional
SMX70 controller not included)
Optional Stop/Jog Controller:
Model SMX70
Optional Outdoor Air Damper Actuator:
Belimo LM24
Thermistor Sensor
310-1865 Assembly
RED
BLK
GRN
LM24
T2
BELIMO
T1
GRN
L1
4
2
ALARM
5
WHEEL
Optional
Motion Detector Sensor
310-1875 Assembly (observe polarity)
Aux. Rotation Alarm (not used)
(See Note 3)
COM
+
+
1
2
3
BLK
RED
WHT
4
1
2
Tightening Torque
For
Slotted Screws
AWG Size
IN-LB
18-10
20
8
25
6-3
35
11
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1Ø Circuit Diagram, Pro-10 through Pro-50
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
1234567890123456789012345678901212345678901234567890123456789012123456789
USE COPPER
CONDUCTORS
ONLY
Line Power
240-208/1/60
Disconnect (by others)
*See Note 2
1CR
H2
M
1CR
H1
Supply Fan
Motor
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).
2CR
H2
Pro-Series
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.
M
Exhaust Fan
Motor
M
Wheel
Motor
2CR
H1
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.
3CR
H2
3CR
H1
Supply Fan Remote Start/Stop
(by others, factory jumpered)
208/240 - 24VAC
75VA UL Cl 2 XFMR
(PRO-10: 40VA)
Time Delay Relay
*See Note 6
1
TR
3
2
2
Optional Thermostat Frost Control
*See Note 4
1
4
1CR
4
2CR
5
2
4
3CR
Remote Unit Start/Stop (by others)
*See Note 4,5
Wheel Remote Start/Stop
(factory jumpered if optional
SMX70 controller not included)
2
4
5
Optional Stop/Jog Controller:
Model SMX70
Optional Outdoor Air Damper Actuator:
Belimo LM24
Thermistor Sensor
310-1865 Assembly
RED
BLK
GRN
LM24
T2
GRN
L1
4
2
ALARM
5
WHEEL
Optional
Motion Detector Sensor
310-1875 Assembly (observe polarity)
12
COM
Aux. Rotation Alarm (not used)
(See Note 3)
Tightening Torque
For
Slotted Screws
AWG Size
BELIMO
T1
IN-LB
18-10
20
8
25
6-3
35
4
1
2
+
+
1
2
3
BLK
RED
WHT
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
3Ø Electric Preheat Frost Control Circuit Diagram
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
123456789012345678901234567890121234567890123456789012345678901212345678901234567
cutout
airflow switch
SC
remote duct stat
with set point adjuster
T1
1
T2
2
SC
SC
fuse
L1
H1
L2
H2
L3
H3
manual cutoff
Solitech
master controller
H1 H2 H3
delta- or wye-connected
electric heat coils
to main panel
on Pro-Series unit
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
1Ø Electric Preheat Frost Control Circuit Diagram
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
12345678901234567890123456789012123456789012345678901234567890121234567890123456
cutout
airflow switch
SC
Pro-Series
Line Power
208-240/480/3/60
3
SC
remote duct stat
with set point adjuster
T1
1
T2
2
3
Line Power
208-240/1/60
SC
L1
electric heat coil
H1
L2
SC
fuse
H1
L3
H3
Solitech
master controller
H2
to main panel
on Pro-Series unit
13
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Electric Preheat Layout
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
UNIT SIZE
W
H
L
A
B
C
Pro -6
24.4
9.0
14.0
20.0
1.0
1.0
Pro -10
24.4
9.0
14.0
20.0
1.0
1.0
Pro -20
31.1
11.0
14.0
20.0
1.0
2.0
Pro -30
39.1
16.0
20.0
40.0
1.0
2.0
Pro -40
49.1
17.0
20.0
40.0
1.0
2.0
Pro -50
49.1
17.0
20.0
40.0
1.0
2.0
Pro -75
56.0
24.0
20.0
40.0
3.0
2.0
Pro -90
56.0
24.0
20.0
40.0
3.0
2.0
Pro-Series
All dimensions in inches.
Pro-Series
W+1"
C
HOOD
NK
T SI
HEA
RIC
ECT
EL
2"
B
L
L
E
PAN
1"
C
W
AIR FLOW
H
A
AIR FLOW
2"
2"
8"
4"
14
PLAN VIEW
SIDE VIEW
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Wheel Cassette
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
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
MOTOR
Pro-Series
Tek Screw
Tek Screw
1/2" deflection
PLAN VIEW
MODEL
Pro-6
Pro-10
Pro-20
Pro-30
Pro-40
Pro-50
Pro-75
Pro-90
LINKBELT TYPE
4L/"A"
4L/"A"
4L/"A"
4L/"A"
4L/"A"
4L/"A"
4L/"A"
4L/"A"
65"
81"
108"
134"
164"
164"
200"
200"
BELT LENGTH
15
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Service
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Pro-Series
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.
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Maintenance
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Filters – The Pro-Series utilizes one-inch deep industrial 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.
Figure 12. All key components including fans and wheel
cassette are removable through the service panel.
Figur
e 11. Replacing the return air filter.
igure
16
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.
Rotation detector
sensor must be
removed from its
holder prior to
sliding the wheel
cassette out!
S u p p ly A ir
Return Air
Pro-6
(1) 1x16x25
(1) 1x16x25
Wheel motor quick release disconnect
Pro-10
(1) 1x16x25
(1) 1x16x25
Pro-20
(2) 1x16x20
(2) 1x16x20
Pro-30
(3) 1x20x20
(2) 1x20x20
Figure 13. Prior to sliding out the wheel cassette the
wheel motor quick release must be disconnected and
the rotation detector sensor must be unmounted.
Pro-40
(4) 1x16x25
(3) 1x16x25
Pro-50
(4) 1x16x25
(3) 1x16x25
Pro-75
(6) 1x16x20
(6) 1x16x20
Pro-90
(6) 1x16x20
(6) 1x16x20
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.
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.
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.
3. Rotate belt end with tab
90°.
4. Pull belt end through two
links.
Assembly
1. Hold belt with tabs
pointing outward.
2. Place end tab through
two links at once.
3. Flex belt further and
insert second tab through
end link by twisting tab
with thumb.
4. Ensure tab returns to
position across belt.
Reverse belt so tabs run
inside.
Pro-Series
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Power Twist® Plus™ V-Belts
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
123456789012345678901234567890121234567890123456789012345
Disassembly
Note: Turn belt inside out (as shown above) to ensure
easy assembly and disassembly.
Figure 14.
17
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.
Pro-Series
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
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
18
PO Box 1797
Columbia, MO 65205-1797
(573) 886-5400
(573) 886-5401 fax
www.ervsystems.com
sales@ervsystems.com
OG 01.3 0704 500 G