System air changeair Freshman Series User manual
Freshman Series
Owners Manual -
Installation, Operation, and Service Instructions
Version 1.1 EN
EN Page 1
Freshman Series
1000A and 1600A Cabinet
Classroom Air Handler Non-Compressorized
and Split Vertical Air Conditioner Improper installation,
adjustment, alteration,
service or maintenance can
cause property damage,
personal injury or loss
of life, and could cause
exposure to substances
which have been
determined by various state
agencies to cause cancer,
birth defects or other
reproductive harm.
Read and understand the
installation, operating, and
maintenance instructions
thoroughly before installing
or servicing this equipment.
Installation and
maintenance must be
installer, service agency, or
authorized dealer.
OPERATION OF UNIT
DURING CONSTRUCTION
MAY VOID THE
WARRANTY.
This manual contains instructions specic to the installation, operation and service of your unit. If installed with the GHM9 gas heat
module, please refer to the GHM9 supplementary installation and operations guide that was also supplied along with this document.
Keep the manual(s) in a safe place and at the ready for future reference.
Should you require further information contact the factory or your regional Changeair representative.
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
List of Sections
1.0 Symbols and Warnings.......................................................4
2.0 Identication ......................................................................5
2.1 General Information .................................................................5
2.2 Unit Inspection ..........................................................................5
2.3 Reference Information .............................................................5
3.0 Limited Warranty................................................................6
4.0 Model Number Nomenclature ...........................................8
4.1 Table 1 | Freshman Series - Nomenclature ..........................8
5.0 General Preventative Maintenance ..................................9
5.1 General Information .................................................................9
5.2 Cleaning The Vertical Classroom Unit ....................................9
5.3 Filter Maintenance ................................................................ 10
5.4 Removing Supply Fan(s)....................................................... 11
5.5 Cleaning Supply and Relief Fans ......................................... 12
5.6 Coil Maintenance ................................................................... 13
5.7 Cleaning Energy Recovery Filters ........................................ 14
5.8 Removing Fixed Core Plates ................................................ 15
5.9 Cleaning Fixed Core Plates ................................................... 16
5.10 Removing Relief Fan(s) Motor .......................................... 16
5.11 Cleaning The Energy Recovery Wheel ............................. 18
5.12 Figure 10 | Removing Relief Fan(s) ................................. 19
6.0 Installation Guide ............................................................ 19
6.1 General Pre-Installation ....................................................... 19
6.2 Table 2 | Minimum Operational Clearances ....................... 19
adjustment and operation of this appliance, read these instructions thoroughly before
attempting installation or operation. Failure to follow these instructions may result in improper
carbon monoxide poisoning, explosion, property damage, personal injury or death.
6.3 General Assembly and Installation ..................................... 20
6.4 Electrical Connections ........................................................... 22
6.5 Wall Sleeve ............................................................................. 22
6.6 Figure 11 | General Wall Sleeve Assembly ........................ 23
6.7 Exterior Louver ...................................................................... 23
6.8 Relief Damper ........................................................................ 24
6.9 Figure 12 | Installing the Relief Damper ............................. 24
6.10 Rear Standoff (RSO) ............................................................ 25
6.11 Top Plenum .......................................................................... 26
6.12 Rear Plenum Assembly (RPA) ........................................... 26
6.13 Top Duct Cover .................................................................... 27
7.0 Installation Drawings ..................................................... 28
7.1 Figure 13 | Freshman - CA H 1000A NA VP DD ................ 28
7.2 Figure 14 | Freshman - CA H 1000A NA VPS DD .............. 29
7.3 Figure 15 | Freshman - CA H 1600A NA VP DD ................ 30
7.4 Figure 16 | Freshman - CA H 1600A NA VPS DD .............. 31
8.0 Troubleshooting Guide .................................................... 32
8.1 General Information .............................................................. 32
8.2 Controls and Mechanical Issues ......................................... 32
8.3 Controls ................................................................................... 32
8.4 Internal Controls and Their Function .................................. 32
8.5 General Unit Sequence of Operations ................................ 33
8.6 General Air Handler Troubleshooting .................................. 34
8.7 Cooling Troubleshooting ....................................................... 35
9.0 Replacement Parts .......................................................... 36
9.1 Obtaining Parts ...................................................................... 36
List of Sections
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
1.0 Symbols and Warnings
Symbols and Warnings
This is a safety alert symbol. When you see this symbol on labels or in
manuals, be alert to the potential for personal injury.
Understand and pay particular attention to words DANGER, WARNING, and CAUTION.
DANGER indicates an imminently hazardous situation, which, if not avoided, will result in death or
serious injury.
WARNING indicates a potentially hazardous situation, which, if not avoided, could result in death
or serious injury.
CAUTION indicates a potentially hazardous situation, which, if not avoided may result in minor
or moderate injury. It is also used to alert against unsafe practices and hazards involving only
property damage.
HAZARDOUS VOLTAGE
Disconnect all power before
Failure to observe this
instruction may result in
death or serious injury.
Burn Hazard.
Do not touch.
power and allow to cool
before servicing.
Rotating Blades could
cause severe injury.
Keep hands clear.
machine to stop before
servicing.
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Identication
2.0 Identication
2.1 General Information
Please keep this page for future reference
You have just purchased a Freshman Series Air Handling Unit.
This design is certied by the Canadian Standards Association
(CSA) and bears the label indicating it has been tested to the
current safety standards UL 1995 and CAN/ CSA 22.2 No. 236
for both the United States and Canada.
To simplify the proper installation and to assure that the unit
will operate in conformity with generally accepted safety
regulations, the manufacturer and testing agency require that
Installation should be carried out by a qualied HVAC techni-
cian using industry accepted standard practices. If questions
arise during installation contact Changeair Technical Services
for assistance before proceeding.
2.3 Reference Information
REFERENCE INFORMATION
For future reference, you should record the following information from the units
Dealer Name: ______________________________________
Address: __________________________________________
City: ______________________________________________
State (Province): ____________________________________
Zip or Postal Code:___________________________________
Country: ___________________________________________
Model Number(s)____________________________________
__________________________________________________
Serial Number(s) ____________________________________
__________________________________________________
Date of Purchase____________________________________
Date of Installation___________________________________
2.2 Unit Inspection
Inspected For Freight Damages
Your air handling unit was carefully packed for shipping. This
means that the packaged product, with normal handling, will
withstand the load conditions encountered in normal transit
and in handling.
Your air handling unit should be inspected at the time of deliv-
ery to determine if any damage is present due to shipping or
handling. If any damage is discovered, do not install the unit.
Notify the freight company immediately and le a damage
claim. The receiver is responsible for identifying damage and
making a claim. If a partial claim is made Changeair will assist
you in determining replacement cost for any damaged parts.
The manufacturer can bear no responsibility for damages that
occur in transit, or for improper operation of the unit as a result
of shipping damages.
NOTE:
Do not deviate from the instructions as
outlined in this manual. Failure to follow
the installation, operation and maintenance
instructions will void the responsibility of
Changeair.
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
3.0 Limited Warranty
LIMITED WARRANTY
LIMITED STANDARD PARTS ONLY WARRANTY (14 months)
maintenance, consistent with Changeair instructions or recommendations for use and maintenance, for a period of 14 months from shipping date.
Changeair’s sole responsibility under this parts warranty will be to replace any part which fails to comply with this warranty during such warranty
period, provided customer has promptly reported same to Changeair. A new or remanufactured part may be provided to replace any defective part
at Changeair’s sole option. Any defective part will be replaced without charge for the part itself, FOB the shipping point. THE EXCHANGED PART
WILL BE WARRANTED FOR ONLY THE UNEXPIRED PORTION OF THE ORIGINAL WARRANTY. NO REPAIR OR REPLACEMENT PURSUANT
TO THIS WARRANTY WILL RENEW OR EXTEND THE LIFE OF THE WARRANTY. Defective parts must be returned to Changeair, transportation
charges prepaid (Changeair is not responsible for any freight charges), where Changeair will establish to its sole satisfaction that the part was
or became defective under normal use and maintenance. All replaced parts will become Changeair’s property. Repairs made pursuant to this
warranty must be made by an authorized Changeair service agency and do not qualify for labor reimbursement. No reimbursement will be made
for transportation, diagnosing, shipping, or handling. THIS WARRANTY APPLIES ONLY TO THE PRODUCT IN ITS ORIGINAL INSTALLATION
LOCATION AND IS VOID IF THE PRODUCT IS REINSTALLED ELSEWHERE.
LIMITED 3 YEAR PARTS WARRANTY ON DAMPER ACTUATORS
normal use and maintenance consistent with Changeair’s instructions or recommendations for use and maintenance. Replacement parts will be
provided under the same conditions as stated above in the limited standard parts only warranty.
LIMITED 5 YEAR PARTS WARRANTY ON GAS HEAT EXCHANGER
instructions or recommendations for use and maintenance. A replacement heat exchanger will be provided under the same conditions as stated
above in the limited standard parts only warranty section.
EXTENDED & OPTIONAL WARRANTIES
replacement parts complete. In either case shipping and labour are the responsibility of the customer.
this optional warranty will be made by an authorized Changeair service agency and will qualify for labor reimbursement (to the service organization
LIMITATION OF WARRANTIES
resulting from (i) any Changeair product being improperly removed, installed, reinstalled, used, maintained or repaired by customer or any third
any intended purpose, (iv) any Changeair product being operated under abnormal conditions or in any manner which is contrary to the instructions
physical or other stress or normal wear and tear.
THE EXPRESS WARRANTIES SET OUT HEREIN ARE EXCLUSIVE AND NO OTHER WARRANTIES, REPRESENTATIONS OR
GUARANTEES OF ANY NATURE OR KIND, WHETHER STATUTORY, ORAL, WRITTEN, EXPRESS OR IMPLIED, INCLUDING
BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE,
WILL APPLY. CUSTOMER’S EXCLUSIVE REMEDIES AND CHANGEAIR’S ONLY OBLIGATIONS ARISING OUT OF OR IN
CONNECTION WITH THE PERFORMANCE OF ITS OBLIGATIONS HEREUNDER OR WITH DEFECTIVE OR DEFICIENT
CHANGEAIR PRODUCTS, WHETHER BASED ON WARRANTY, CONTRACT, TORT (INCLUDING NEGLIGENCE AND GROSS
NEGLIGENCE) OR OTHERWISE, WILL BE THOSE EXPRESSLY STATED HEREIN.
representatives and/or suppliers for all claims, demands, liabilities, losses, actions, damages, expenses and costs relating to or resulting or arising
out of (i) the performance or non-performance of its obligations hereunder, or (ii) the sale, operation or use of any Changeair product exceed the
aggregate amount paid by customer for the Changeair product.
Limited Warranty
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
unless the injury, loss or damage giving rise to such claim or demand is sustained within the applicable warranty period referred to above and
THE EXPRESS WARRANTIES SET OUT HEREIN ARE VOID IN CASES WHERE THE CHANGEAIR PRODUCT IS NOT USED
IN ACCORDANCE WITH THE CHANGEAIR OPERATING MANUAL, EXPOSED TO ENVIRONMENTS OUTSIDE OF ITS
INTENDED USE OR DAMAGED THROUGH NEGLIGENCE OR INTENTIONAL ACTS OF ANY PARTY.
NO REPRESENTATIVE, DEALER OR OTHER PERSON IS AUTHORIZED TO ASSUME FOR CHANGEAIR ANY ADDITIONAL, DIFFERENT OR
OTHER LIABILITY IN CONNECTION WITH THE SALE OF THIS CHANGEAIR PRODUCT.
ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING HOURS. ALL REPLACEMENT
PARTS ASSUME AS THEIR WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THE APPLICABLE WARRANTY HEREUNDER.
CHANGEAIR WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the installation, operating and service instructions manual including but not limited to cleaning of
2.
pressure or other damages due to inadequacy or interruption of electrical service or gas supply.
3. Damage or repairs required as a consequence of faulty or improper installation, not in conformance with Changeair instructions.
4.
Changeair.
5. Parts or accessories not supplied by Changeair.
6. Costs incurred in gaining access to the equipment.
7. Damage or repairs required as a consequence of any misapplication, abuse, unreasonable use, unauthorized alteration, improper service,
improper operation or failure to provide reasonable and necessary maintenance.
8. Freight charges incurred with respect to parts replaced.
9.
10. Changeair products whose serial number has been altered, defaced or removed.
11. Fuel or electricity costs or increases in such costs from any reason whatsoever.
12. NOTWITHSTANDING ANY OTHER PROVISION HEREOF, IN NO EVENT WILL CHANGEAIR BE LIABLE FOR ANY INDIRECT, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES OF ANY NATURE OR KIND INCLUDING, BUT NOT LIMITED TO, CLAIMS FOR SERVICE
INTERRUPTION, DELAYS, RE-PROCUREMENT COSTS, LOSS OF PROFIT, LOSS OF REVENUE, LOSS OF USE, LOSS OF GOODWILL,
COST OF SUBSTITUTE PRODUCTS, FACILITIES OR SERVICES, LOSS OF PRODUCTION OR COST OF CAPITAL, WHETHER OR
NOT CHANGEAIR HAS BEEN ADVISED OF THE POSSIBILITY OF ANY SUCH DAMAGES, WHETHER OR NOT FORESEEABLE AND
WHETHER OR NOT BASED ON A BREACH OF CONTRACT, NEGLIGENCE OR GROSS NEGLIGENCE.
WARRANTY CLAIM PROCEDURE
Changeair agent and request the name and address of a Changeair authorized service provider in its geographical area. Customer shall compile
all available information concerning the parts and necessary labour required to rectify the defect and return the Changeair product to normal
warranty claim is within the prescribed time period, Changeair will promptly return the warranty claim form to customer with instructions concerning
the procedure to be followed to repair the defect, together with a warranty authorization number. NO WORK TO RECTIFY ANY DEFECT FOR
WHICH WARRANTY COVERAGE IS SOUGHT BY CUSTOMER SHALL BE COMPLETED UNTIL CHANGEAIR HAS ISSUED A WARRANTY
components to customer within 2 business days. Costs of such replacement component(s) will be invoiced to customer but credit shall be given
upon receipt by Changeair of the defective component and determination by Changeair that customer’s warranty claim is valid. Receipts for any
Changeair determines that the alleged defective component was either (i) not defective or (ii) the defect was a result of an event or action which
voided the warranty, customer shall be entitled to retain the replacement component but shall be responsible to pay Changeair for the replacement
component, plus the costs of repairs and labor if applicable.
GOVERNING LAW; ENTIRE AGREEMENT
thereof. For international contracts, the provisions of Ontario law, and not the UN Convention on Contracts for the International Sale of Goods, shall
apply.
except in a writing signed by Changeair and you.
Limited Warranty
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4.0 Model Number Nomenclature
4.1 Table 1 | Freshman Series - Nomenclature
Model Number Nomenclature
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Before beginning with any preventative maintenance, you MUST follow these safety
precautions. Failure to do so may result in personal injury or death
General Preventative Maintenance
5.0 General Preventative Maintenance
5.1 General Information
By performing proper preventative maintenance your unit will
operate economically and dependably. Instructions for basic
maintenance are found below.
1. Always turn OFF electrical power supply before cleaning
the unit or performing any maintenance.
2. Although special care has been taken to minimize sharp
edges, take extra care when handling parts or reaching
into units.
3. Label all wires prior to disconnecting. Wiring errors can
cause improper and dangerous operation. Verify proper
operation after service.
NOTE:
The following is a generalized list of
maintenance procedures that pertains to
all Changeair Air Handlers, therefore one or
more of the procedures may not apply to
your particular unit(s).
5.2 Cleaning The Vertical Classroom Unit
Exterior
Annually or as needed, thoroughly clean cabinet exterior
using a soft absorbent cloth, mild soap and water and/or non
abrasive non-acidic cleaner.
Interior
1. Clean the interior annually or as needed.
2. Check and clean or replace air lter(s) monthly or as
required. (Refer to Section )
3. Thoroughly vacuum entire unit.
4. Wipe down metal parts as needed.
5. Clean fan assemblies. Refer to the Maintenance Section
on Fans. (Refer to Page 12)
6. Check Heating and Cooling coils (if equipped) for clean-
liness at the start of each heating and cooling season
(Refer to Page 13) .
7. Disinfect drain pan and drain lines (if equipped).
8. Check electrical connections for tightness and controls
for proper operation, including the damper actuator(s)
annually.
9. Check condensate drain and drain lines at the beginning
of each season. ( A/C Units Only).
10. Test unit and controls for complete functionality and
replace and/or adjust parts as required.
11. Check the exterior louver to be sure it is free of debris or
obstructions once a year.
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Never operate unit without
so may damage internal
components and/or cause
Figure 1 | Changing Filters
5.3 Filter Maintenance
Filtering Out Trouble
Dirty air lters will cause air ow reduction through your unit. If excessive air loss
occurs, the unit may freeze up when in the air conditioning mode, or cycle on high
and limit safety controls during heating mode. If this condition persists the unit may
be locked out by the safety circuits.
Each unit will be equipped with either 1” or 2” disposable pleated lters, a 1/4”
washable lter, or a combination of washable and disposable lters.
Cleaning or Changing Filters
(Recommended once a month or as required).
1. Turn OFF electrical supply to unit.
2. Open the upper and lower front service panels with the key provided. Keys may
vary.
3. Slide out dirty lters and replace with new ones (Fig. 1) Or wash lters (if
permanent) with water, ushing in opposite direction of air ow, let dry and
replace.
4. Close the upper and lower front service panel and lock with key.
HAZARDOUS VOLTAGE
Disconnect all power before
Failure to observe this
instruction may result in
death or serious injury.
Disposable Filter(s)
General Preventative Maintenance
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Figure 2 | Removing Supply Fan(s)
5.4 Removing Supply Fan(s)
Remove SUPPLY FAN MOTOR as follows
1. Turn OFF electrical supply to the unit.
2. Open front service panels of unit using key provided.
3. Disconnect the wire harness running to the fan motor. (Fig. 2)
4. Remove fastening screws from either side of fan assembly
5. Pull fan assembly straight out of unit and clean dirt from fan blades and around
motor housing.
6. Replace fan assembly in track, push in fully and re-secure with fastening screws.
7. Reconnect wire harness to fan motor.
8. Close service panels and lock with key, turn electrical power ON, and test
operation of the unit.
should perform the following.
Supply Fan Assembly
Fastening Screws
FRONT
Fan Pan
Shock
Hazard
Rotating Blades could
cause severe injury.
Keep hands clear.
machine to stop before
servicing.
General Preventative Maintenance
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
5.5 Cleaning Supply and Relief Fans
1. Remove Fan from unit. (Refer to Section 5.5)
2. Take a brush or similar cleaning tool and clean blades of fan to remove built up
attached dirt.
3. Use a vacuum or compressed air and clean entire fan including the blades.
4. Replace fan in unit. (Refer to Section 5.5)
Figure 3 | Motor Fan Assembly
Wear eye protection
when working with
compressed air.
Standard Motor Fan Assembly
Blower Fins
(Blow dirt out with compressed air)
Fan Housing Motor Mounts
Standard Electric Motor
General Preventative Maintenance
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5.6 Coil Maintenance
Heating Coil (Open Access)
1. Using a coil brush remove/dislodge excess foreign matter.
2. Vacuum loosened foreign matter.
3. Using compressed air, clean coil in reverse direction of air ow and/or using an
environmentally safe cleaner, spray top side of coil and allow to soak for sev-
eral minutes.
4. If required, wipe up drips and excess spray (allow to dry if required).
5. Re-assemble unit and test.
Cooling Coil
Gain access to back side of coil through supply fan opening (removal required) -
blow through design; or through lter opening - (draw through design).
1. Using a coil brush remove/dislodge excess foreign matter.
2. Vacuum loosened foreign matter.
3. Using compressed air, clean coil in reverse direction of air ow and/or using an
environmentally safe cleaner, spray top side of coil and allow to soak for sev-
eral minutes.
4. If required, wipe up drips and excess spray (allow to dry if required).
5. Re-assemble unit and test.
can be damaged easily.
Clean with care.
Figure 4 | Coil Maintenance
Wear eye protection
when working with
compressed air.
General Preventative Maintenance
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
5.7 Cleaning Energy Recovery Filters
Dirty air lters will cause air ow reduction through your unit. If excessive air loss
occurs, the unit may freeze up when in the air conditioning mode, or cycle on high
and limit safety controls during heating mode. If this condition persists the unit may
be locked out by the safety circuits.
Each unit will be equipped with a 1/4” washable lter in two locations.
Cleaning Energy Recovery Filters
Cleaning Filters is recommended once a month or as required.
1. Turn OFF electrical supply to unit.
2. Open the upper and lower front service panels with the key provided. Keys may
vary.
3. Slide out dirty lters (Fig. 5) wash with water, ushing in opposite direction of air
ow, let dry and replace.
4. Close the upper and lower front service panel and lock with key.
Figure 5 | Removing Energy Recovery Filters
Washable Filters
Filter Cover
Never operate unit without a
damage internal components
and/or cause a loss of
HAZARDOUS VOLTAGE
Disconnect all power before
Failure to observe this
instruction may result in
death or serious injury.
General Preventative Maintenance
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Exchange Core
Support Plate
Exchange Core
Return Air
Relief Filter
Exchange Core
Support Plate
Recovery Fan
Figure 6 | Removing Fixed Core Plates
5.8 Removing Fixed Core Plates
1. Turn OFF electrical power to the air handler.
2. Open front service panels with the key provided.
3. Slide return air lter up and out of brackets and set aside.
4. Remove the screws holding the exchange core cover plate and remove plate.
5. Loosen the screws on the exchange core cover plate.
6. Slide exchange core cover plate up and tighten screws to hold plate in upper
position.
7. Slide core away from retaining arm, rotate towards front of unit and lift out.
General Preventative Maintenance
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5.9 Cleaning Fixed Core Plates
1. If cores are wet allow them to dry before cleaning
2. Using low psi compressed air blow dirt out of cores in
the opposite direction of the air ow (Fig. 7)
3. Once clean, repeat the core removal steps in reverse
order to install the cores
4. Once installed, close doors and turn electrical power
back on.
5. Test unit for proper function.
Compressed Air
Figure 7 | Cleaning Fixed Core Plates
5.10 Removing Relief Fan(s) Motor
1. Turn OFF electrical power to the air handler.
2. Open front service panels with the key provided.
3. Slide return air lter up and out of brackets and set aside.
4. Remove the screws holding the exchange core cover plate and remove plate.
5. Remove the screws on the exchange core cover plate and remove plate.
6. Slide cores away from retaining arms, rotate towards front of unit and lift out to
gain access to fans.
should perform the following.
Wear eye protection
when working with
compressed air.
NOTE:
It is recommended that
the cores be cleaned
every 3-6 months.
General Preventative Maintenance
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Exchange Core Cover Plate
Relief Fan
Exchange Core Support Plate
Recovery Fan
Exchange Cores
Return Air Washable Filter
Figure 8 | Removing Relief Fans(s) Motor
Shock
Hazard
Rotating Blades could
cause severe injury.
Keep hands clear.
machine to stop before
servicing.
7. Unplug the electrical wires running
to the recovery fan motor.
8. Remove the 4 bolts located on top
of the return air damper pan that
holds the recovery fan motor.
9. Pull down on fan and remove from
unit.
10. Clean dirt from fan blades and
around motor housing using
compressed air or cloth.
11. Reinstall recovery fan motor.
12. Reconnect electrical plug to recovery
fan motor.
13. Reinstall exchange cores, cover
plates and lter.
14. Close service panels and lock with
key, turn electrical power on, and
test operation of the unit.
5.10 Removing Relief Fan(s) Motor - continued
General Preventative Maintenance
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5.11 Cleaning The Energy Recovery Wheel
Cleaning Instructions
1. Turn OFF electrical supply to the unit.
2. Open front service panels using key provided.
3. Disconnect the wire harness to the actuator located on the return air damper.
4. Remove the screws that is holding return air damper in place.
5. Remove the relief air lter.
6. Carefully pull on the energy recovery module up and out until you are able to
unplug the wire harness.
7. Place the module so you have easy access to the front and back.
8. If the core is wet allow them to dry before cleaning.
9. Using low psi compressed air blow dirt out of core, rotate wheel as required to
completely clean core (Fig. 9).
10. Reassemble in reverse order.
11. Once installed, close doors and turn electrical power back on.
12. Test unit for proper function.
Manufacturer's Recommended Cleaning
Wash the segments or small wheels with a non-acid based (evaporator) coil cleaner
or alkaline detergent solution. Non-acid based coil cleaner such as KMP Acti-Clean
AK-1 concentrate in a 5% solution has been demonstrated to provide excellent
results. Do not use acid based cleaners, aromatic solvents, temperatures in excess
of 170 OF or steam; damage to the wheel may result. Soak in the cleaning solution
until grease and tar deposits are loosened. An overnight soak may be required to
adequately loosen heavy deposits of tar and oil based contaminants.
Internal heat exchange surfaces may be examined by separating the polymer strips
by hand. After soaking, rinse the dirty solution from the wheel until the water runs
clear. Allow excess water to drain prior to replacing segments in the wheel or rein-
stalling the wheel in the cassette. A small amount of water remaining in the wheel
will be dried out by the airow.
Compressed Air
Relief Air Filter
Energy Recovery Wheel
NOTE:
Some staining of the
desiccant may remain
and is not harmful to
performance.
Figure 9 | Cleaning Energy Recovery Wheel
Wear eye protection
when working with
compressed air.
General Preventative Maintenance
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
Installation Guide
5.12 Figure 10 | Removing Relief Fan(s)
Return Air Damper
Relief Fan(s)
6.0 Installation Guide
6.1 General Pre-Installation
A location should be selected that will give the best circula-
tion of the conditioned room air. Do not locate the unit behind
a door, or at a point where a door, if left open, would obstruct
the ow of supply/return air.
When choosing a location for the unit, keep in mind the mini-
mum clearances listed in the tables below. These clearances
assure accessibility for service and proper, safe operation of
the unit.
After selecting a location for the unit, inspect the wall and
oor areas to determine that there are no hidden electri-
cal wires, propane or other ammable gas-liquid piping or
tubing, ducts, girders, or wall studs that will interfere with
the installation of the unit or its utility connections.
OUTDOOR CLEARANCE
Rear to nearest obstruction 36"
Sides to nearest obstruction 0"
Bottom to ground * 0"
INDOOR CLEARANCES TO COMBUSTIBLE
All sides, top and bottom 0"
Discharge grille to obstruction 36"
Discharge grille to ceiling 6"
INDOOR CLEARANCES FOR SERVICE
Front to nearest obstruction** 36"
Right side to nearest obstruction 0"
Left side to nearest obstruction 0"
Top of unit to nearest obstruction 1"
* This dimension may vary due to local
conditions. The unit must be located so that
the exterior louver cannot be blocked with
leaves, snow, water or debris (applies to all
units).
** Obstruction may be closer if return air is not
blocked between oor and bottom of unit, and
if obstruction is removable to allow a minimum
of 36” for service access.
Minimum Operational Clearances
For all models not containing gas heat
6.2 Table 2 | Minimum Operational Clearances
NOTE:
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Freshman Series - Owner's Manual - Installation, Operation, and Service Instruction - Version 1.1 EN
General Installation Instructions of the Classroom Air Handler
1. Once the Rear Standoff (RSO) or Rear Plenum Assembly (RPA) installation has been completed (if applicable) and the Wall
Sleeve has been installed, proceed with fastening the Classroom Air Handler in place. (Refer to Page. 25, 26)
2. To assure a tight seal between the unit (or standoff) and the wall, apply foam tape to the 1” wide mounting edge and to
any partitions of the rear standoff (or unit).
3. If the unit has a cooling coil and drain pan, pass the drain hoses that come out the back of the unit through the wall sleeve.
These hoses must gravitate drain downward to the outside as they pass through to the exterior louver. They must allow
condensate to drain freely to the outside without restriction and without inhibiting the operation of the dampers. (It will be
necessary to cut away enough of the bird screen in the back of the exterior louver to allow the condensate hoses to pass
between the blades of the louver to the exterior.)
-
ping over once the shipping crate is removed. Never lean a ladder against the unit or put weight
on or against the unit prior to completing the installation as it may tip.
6.3 General Assembly and Installation
It is important to read and understand the instructions outlined in this document, as well as any job specic documentation pro-
vided in the Information Package before proceeding with the installation.
Care should be taken to protect the painted nish when handling the unit and accessories.
You may require an assistant's help for this procedure.
The condensate hose is supplied with a loop (trap). DO NOT REMOVE THIS LOOP. If the loop
NOTE:
Keep the tape back from the outside edges by at least ¼” so the tape does not become unsightly when
compressed.
Installation Guide
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