PLASTEC VENTILATION PSS Series User manual

Installation,
Operation
and Maintenance
Manual
September 2020

Plastec Ventilation Inc.
Installation, Operation & Maintenance Manual
September 2020
www.plastecventilation.com | [phone] page 1
Table of contents
1GENERAL INSTRUCTIONS .............................................................................................................................................2
1.1 ESSENTIALS......................................................................................................................................................................2
1.2 INSTALLATION ..................................................................................................................................................................3
1.3 TEST &START PROCEDURES................................................................................................................................................3
1.4 MAINTENANCE.................................................................................................................................................................4
1.5 MOTORS.........................................................................................................................................................................4
1.6 WARRANTY .....................................................................................................................................................................5
2PLASTEC UTILITY AND STORM BLOWERS .....................................................................................................................6
2.1 DISASSEMBLY INSTRUCTIONS...............................................................................................................................................6
2.2 REASSEMBLY INSTRUCTIONS................................................................................................................................................6
2.3 ILLUSTRATION:PLASTEC UTILITY AND STORM BLOWER.............................................................................................................7
2.4 ILLUSTRATION:ATTACHMENT OF PLASTEC FAN TO WEATHER HOOD...........................................................................................8
3PLASTEC PSS SERIES STAINLESS STEEL UTILITY BLOWERS .............................................................................................9
3.1 DISASSEMBLY INSTRUCTIONS...............................................................................................................................................9
3.2 REASSEMBLY INSTRUCTIONS................................................................................................................................................9
3.3 ILLUSTRATION:PSS SERIES –PSS20 AND PSS35 .................................................................................................................10
4PLASTEC JET SERIES....................................................................................................................................................11
4.1 DISASSEMBLY INSTRUCTIONS.............................................................................................................................................11
4.2 REASSEMBLY INSTRUCTIONS..............................................................................................................................................11
4.3 ILLUSTRATION:JET SERIES.................................................................................................................................................12
5ROOF UNIT KITS .........................................................................................................................................................13
5.1 ROOF UNIT 15 –ROOF UNIT 30 KIT ASSEMBLY ...................................................................................................................13
5.2 ROOF UNIT 35 KIT ASSEMBLY ...........................................................................................................................................16
6ELECTRICAL WIRING...................................................................................................................................................17
6.1 GENERAL PRECAUTIONS ...................................................................................................................................................17
6.2 DIAGRAM......................................................................................................................................................................17
6.3 EXAMPLE:CW HIGH VOLTAGE..........................................................................................................................................17

Plastec Ventilation Inc.
Installation, Operation & Maintenance Manual
September 2020
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1General instructions
1.1 Essentials
1.1.1 Introduction
DO NOT INSTALL, USE OR OPERATE THIS EQUIPMENT UNTIL THIS MANUAL HAS BEEN FULLY READ
AND UNDERSTOOD. RETAIN THESE INSTRUCTIONS FOR FUTURE USE.
THESE INSTRUCTIONS ARE INTENDED TO SUPPLEMENT GOOD GENERAL PRACTICES FOR THE
VARIOUS STYLES OF PLASTEC FANS AND BLOWERS. DETAILED INSTRUCTIONS WILL BE PRESENTED
SEPARATELY.
IT IS THE RESPONSIBILITY OF THE USER / PURCHASER TO ASSURE THE INSTALLATION, OPERATION,
AND MAINTENANCE OF THIS EQUIPMENT IS CARRIED OUT BY EXPERIENCED AND QUALIFIED
PERSONNEL IN THIS TYPE OF WORK.
CONTACT YOUR LOCAL REPRESENTATIVE FOR ANY FURTHER INFORMATION REQUIRED.
By using this product, Buyer, and Buyer’s past, present, and future agents, representatives, attorneys, affiliates,
heirs, executors, assigns and successors, and all other persons or entities associated therewith, agrees that it will
indemnify and hold harmless Plastec Ventilation Inc., and all of its past, present, and future agents,
representatives, principals, attorneys, affiliates, owners, parent corporations, subsidiaries, officers, directors,
employees, assigns and successors, and all other persons or entities associated therewith, against any and all
claims, demands, causes of action, liabilities, damages, costs, and judgments, including attorney’s fees, hereafter
brought or asserted by any person or entity arising out of the design, installation or use of any Product(s)
manufactured by Plastec Ventilation Inc under this Agreement and in accordance with Buyer's Specifications
except for any intentional acts of Manufacture or any of Manufacture's employees, agents or contractors.
No claims, representations or warranties, whether expressed or implied, are made by Plastec Ventilation Inc as to
the safety, reliability, durability, and performance of any of our companies' products. Furthermore, our company
accepts no liability whatsoever for the safety, reliability, durability, and performance of any of our companies'
products.
1.1.2 Shipping & Receiving
All fans and blowers have been thoroughly inspected before shipment. Unless otherwise noted. All fans and
blowers are tested and approved prior to shipment.
THE RECEIVER MUST NOTE ANY DAMAGE ON THE CARRIER’S BILL OF LADING AND FILE A CLAIM
IMMEDIATELY WITH THE FREIGHT COMPANY.
Keep a record of all equipment received including inspection details and date of receipt. Contact your sales
representative for replacement service.
Handle your equipment with caution using proper equipment and safety procedures.
1.1.3 Storage
Store fans in a clean, dry location prior to installation to protect against the weather and corrosive atmospheres. If
it is necessary to store equipment outdoors, protect from the elements as much as possible. Keep equipment dry
and clean. Cover inlets/outlets to prevent collection of moisture, dust, etc.

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For equipment stored for extended periods of time (1 month), rotate motor bearings. Records of stored equipment
should be kept to assure proper procedures.
1.2 Installation
Area where fan is installed should provide support for rigid mounting of the fan(s). Fans not supported properly
will cause vibration that could cause damage or injury!
Use guy wires to secure roof mounted units, stacks and accessories where excessively windy conditions are
prevalent.
CAUTION! Fans contain rotating parts and electrical service is used to operate.
Use appropriate safety precautions during Installation, Operation and Maintenance procedures.
WARNING! Do not install or operate fan in an environment or atmosphere where combustible or flammable
materials, gases or fumes are present unless it is specifically designed for that type of environment. Explosion or
fire can result.
Roof curbs for mounting of fans should be securely installed prior to fan installation. Fan should be firmly secured
to roof curb to prevent vibration.
CAUTION! All electrical work must be done in accordance with local and /or national codes as applied. Work
should be performed by qualified electricians.
WARNING! This product must be grounded.
DANGER! Make sure power is turned off and locked in the off position before installing, wiring or servicing fan.
CAUTION! Always check the supply voltage against the motor name plate voltage. Incorrect voltage can damage
the motor and void the motor warranty.
WARNING! Keep all wiring clear of rotating or moving parts.
WARNING! Before starting the fan, turn the wheel to assure it rotates freely. POWER MUST BE OFF DURING
THIS OPERATION.
CAUTION! Before operating any fan or blower, make sure any guards or protective devices required are in place
for protection against injury.
1.3 Test & Start Procedures
WARNING: Do not insert your hands or arms in the fan while it is running.
It is highly recommended to insert an exhaust cap on the outlet and a six feet duct on the inlet flange to avoid
accident or aspiration of hand, arm or clothes when the fan is running. Do not wear a scarf close to the fan when it
is running to avoid accidental choking and potential death.
Disconnect power before servicing the unit. Make sure power is turned off and locked in the OFF position.
Check that fan/blower is securely attached to the mounting location and that the mounting location is also secure.
This unit should not vibrate when operating! Check clearances and all mounting hardware and secure as
required.
All fans have sealed for life ball bearings and do not require lubrication. Running the unit for 15 to 20 minutes will
assure lubricant to thoroughly mix with the bearings and operate at optimum quietness.

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When power is applied to the unit, check for proper rotation of fan wheel/impeller. Most motors allow for reverse
rotation and if the fan wheel/impeller is moving in the wrong direction, air performance will be greatly affected.
Reverse rotation for a prolonged period may cause motor damage that could void the warranty. Check the motor
wiring diagram for proper wiring.
Electrical input check should be performed with fan properly loaded (pressure drop) to assure motor name plate
amps are not exceeded. Never run a fan at free air.
Do not open the terminal box before tuning of the power.
Check fan RPM against motor name plate to verify correct performance.
The fans are factory tested and checked for vibration, so this type of balancing is not required. Vibration could be
caused by rough handling during shipment, installation, and weak foundations. Correct as required.
1.4 Maintenance
Before performing any maintenance on the fan, be sure power is turned off and locked in the off position at the
service entrance.
Ventilators should be carefully checked at least once a year. For critical or rugged applications, a routine check
every two or three months is suggested.
All motors carry a one-year warranty from the date of shipment. For repairs within the warranty period, the motor
must be taken to the motor manufacturer’s authorized service dealer. Contact your representative for additional
warranty details.
A periodic motor check should consist of spinning the motor shaft with the power off to be sure the motor turns
freely and the bearings run smoothly.
The motor cooling fan and guard should also be maintained by checking and cleaning accumulated dust and
debris.
The rotating wheel or propeller requires enhanced attention since materials in the air being handled can build up
on blades to cause destructive vibration or weaken the structure of the propeller by corroding and /or eroding the
blades. Regular inspection and corrective action at intervals determined by the severity of each application are
essential to good service life and safety.
WARNING: Failure to comply with the above-mentioned maintenance schedule may result in catastrophic failure
of equipment. Said failure may include physical damage, shrapnel, electrical short, equipment damage,
overheating, fire, property damage and other dangerous conditions.
1.5 Motors
Periodic checks of voltage, frequency and current of a motor while in operation are recommended. Such checks
assure the correctness of frequency and voltage applied to the motor and yield an indication of the fan load.
Comparison of this data with previous data will give an indication of the fan performance. Any serious deviations
could indicate a potential motor failure.
All motors carry a one-year warranty from date of shipment. For repairs within warranty period, the motor must be
taken to the motor manufacturer’s authorized service dealer. Contact your representative for additional warranty
details.
A periodic motor check should consist of spinning the motor shaft with the power off so to be sure the motor turns
freely and the bearings run smoothly.

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Repair or replacement of motors is normally performed by a repair station authorized by the manufacturer.
Contact your representative or the factory for locations nearest you. DO NOT ship motor to factory without
specific authorization forms.
1.6 Warranty
This Blower Housing Assembly is warranted to be free from defects in material and workmanship for two years
from date of original shipment. Any units or parts which prove to be defective and are reported during the
warranty period will be replaced at our option when returned to our factory, transportation prepaid by the sender.
Deterioration of wear by heat, abrasive action, chemicals, improper installation or operation or lack of normal
maintenance shall not constitute defects, and are not covered by warranty. Transportation to and from the factory
for warranty repairs is not covered under warranty and is the sole responsibility of the owner of the equipment.
The motor is warranted by the motor manufacturer for one year. If the motor becomes defective in the warranty
period, it should be taken to the nearest authorized motor service station. If this is not done, the motor
manufacturer will not warrant the motor. Call the factory for instructions if authorized service station is not known.
The manufacturer will not be responsible for any installation, removal or re-installation cost or any consequential
damage resulting in failure to meet conditions of any warranty.
LIMITATION OF WARRANTY AND LIABILITY: This warranty does not apply to any product or parts which have
failed as a result of faulty installation or abuse, or incorrect electrical connections or alterations, made by other, or
use under abnormal operating conditions or misapplications of the products and parts.
The manufacturer will not approve for payment any repairs made outside its factory without prior written consent.
The foregoing shall constitute our sole and exclusive warranty and our sole and exclusive liability and is in lieu of
all other warranties whether written, oral, implied, or statutory. There are no warranties which extend beyond the
description of the page hereof. Seller does not warranty that said goods and articles are merchantable quality or
that they are fit for any particular purpose. The liability of seller on any claim of any kind, including negligence, for
any loss or damage arising out of, or connected with, or resulting from the sale and purchase of the products and
parts covered by this proposal, acknowledgment, order or from performance or breach of any contract pertaining
to such sale or purchase, or from the design, manufacture, sale, delivery, resale, installation, technical direction of
installation, inspection, repair, operation or use of any products or parts covered by this proposal,
acknowledgment, order or furnished by seller shall, in no case exceed the price allocable to the product or parts
thereof which give rise to the claim and shall terminate one (1) year after shipment of said products and parts.
In no event, whether as a result of breach of contract, or warranty or alleged negligence, defects, incorrect advise
or other causes, shall seller be liable for special or consequential damages including, but not limited to, loss of
profits or revenue, loss of use of the equipment or any associated equipment, cost of capital, cost of substitute
equipment, facilities or services, down time costs or claims of customers of the purchaser for such damages. The
manufacturer neither assumes nor authorizes any persons to assume for it any other liability in connection with
the sale of its fan products and parts.
SAFETY ACCESSORIES WARNING: The responsibility for providing safety accessories for equipment supplied
by the manufacturer is that of the installer and user of this equipment. The manufacturer sells its equipment with
and without safety accessories, and accordingly it can supply such safety accessories upon receipt of order.
The user, in making its determination as to the appropriate safety accessories to be installed and any warning
notices, should consider (1) the location of the installation, (2) the accessibility of employees and other persons to
this equipment, (3) any adjacent equipment, (4) applicable building codes, and (5) requirements of the Federal
Occupational Safety and Health Act.

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Users and installers of this equipment should read, “RECOMMENDED SAFETY PRACTICES FOR AIR MOVING
DEVICES” which is published by Air Movement and Control Association, 30 West University Drive, Arlington
Heights, Illinois, 60004.
The invalidity or unenforceability of any particular provision in this document shall not affect the other provisions
hereto, and this document shall be construed as though such invalid or unenforceable provisions were omitted.
2Plastec utility and Storm Blowers
2.1 Disassembly Instructions
Before beginning these instructions, place this fan on a bench or tabletop that can support its weight.
1. Remove Torx head screws from the motor plate. (These screws require a T-20 bit.)
2. Lift the assembly clear of the fan housing. Set the fan housing aside.
3. Use a thin flat head screwdriver to pop the black hub cap off the bushing. It may be necessary to reach
between the blades of the impeller to do this. (Be careful not to damage the impeller during this step.)
4. Remove the shaft bolt, lock washer and washer. The bolt will be 8mm, 10mm or 13mm.
5. Use a gear puller to remove the impeller from the shaft. Always use the bushing as the pulling point.
Pulling on the blades or rim of the impeller will cause irreparable damage.
6. Use a 10mm or 13mm socket to remove the four bolts securing the motor plate to the C-face.
(See Illustrations)
2.2 Reassembly Instructions
Before beginning these instructions, place this fan on a bench or tabletop that can support its weight.
1. Stand the motor on end, so that the shaft is pointing vertically.
2. Set the motor plate onto the C-face and align bolt holes. If motor plate does not fit flush on the C-face,
use a small hammer or dead blow mallet to seat the plate onto the rabbet. You should not need much
force to seat the plate. Secure the motor plate with four bolts, lock washers and washers.
3. Check the fit of the impeller bushing on the motor shaft. If it slides on easily, then push it onto the shaft
and tap to seat it on the shaft shoulder. If it is a tight fit, lubricate the inside of the bushing with 3-in-1 oil or
a similar product. Set the impeller on top of the shaft so it sits level. Use a driving rod and mallet, on
bushing only, to drive the impeller onto the shaft until it touches the shoulder. Do not hit with excessive
force or the bearings may be damaged. Remove any debris that was cut from the inside of the bushing. If
there is a gap between the tip of the shaft and the top of the bushing, fill it with stainless steel washer(s).
4. Secure the impeller on the shaft with supplied bolt, lock washer and washer.
5. Cover the bushing with the hub cap and use a mallet to seat it properly. It may be necessary to cut out
the raised ring on the inside of the hub cap with a box knife.
6. Select the orientation of the fan housing. There are eight possible orientations.
7. Remember, if the fan is being installed in a weather hood, the motor will be upside down. Use eight Torx
head screws to secure the motor assembly to the fan housing. Inspect visually and test electrically before
installing the fan.
(See Illustrations)

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2.3 Illustration: Plastec Utility and Storm Blower

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2.4 Illustration: Attachment of Plastec Fan to Weather
Hood
1. The motor feet should point vertically upwards for attachment to
the underside of the hood top. Ensure that the fan discharge is
correctly orientated in relation to the motor feet.
2. It is recommended that the motor is connected to the disconnect
switch prior to assembly of motor and weather hood, otherwise
access to the terminals may be difficult.
3. Insert the four bolts into the holes in the weather cover. Prevent
them from falling out by fitting the barbed washers.
4. Secure weather hood to the motor by means of nuts, large
washers and lock washers. This is best accomplished by placing
the fan housing on a horizontal surface with the motor shaft
vertical, then introduce the holes in the hood to the bolts you
have fitted to the motor feet.
5. Ensure that the weather hood is installed in an up- right position
and that the drain holes in the base panel are clear.
Notes:
(1) Direction of rotation is determined from the drive side of fan.
Standard position is up-blast CCW 360.
(2) On single inlet fans, drive side is always considered as the
opposite fan inlet.

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3Plastec PSS Series Stainless Steel Utility
Blowers
3.1 Disassembly Instructions
Before beginning these instructions, place this fan on a bench or table top that can support its weight. For tool
size see illustration.
1. Remove Hex cap screws from the motor plate. (Be careful not to damage the impeller during this
operation.)
2. Lift the assembly clear of the fan housing. Set the fan housing aside.
3. Remove the hub cap and teflon gasket.
4. Loosen the shaft locking screws (hub).
5. Use a gear puller to remove the impeller from the shaft. Always use the bushing as the pulling point.
Pulling on the blades or rim of the impeller will cause irreparable damage.
6. Remove the 4 motor plate bolts to remove the motor plate from the motor.
7. Remove the motor support stand if required by this operation.
(See Illustrations)
NOTE: Any new assembly parts or mounting hardware sourced must be 316 Stainless Steel
3.2 Reassembly instructions
Before beginning these instructions, place this fan on a bench or table top that can support its weight.
1. Stand the motor on end, so that the shaft is pointing vertically.
2. Set the motor plate onto the C-face and align bolt holes. If motor plate does not fit flush on the C-face,
use a small hammer or dead blow mallet to seat the plate onto the rabbet. You should not need much
force to seat the plate. Secure the motor plate with four bolts, lock washers and washers. Apply the teflon
gasket between the motor plate and housing.
3. Check the fit of the impeller bushing on the motor shaft. If it slides on easily, then push it onto the shaft
and tap to seat it on the shaft. If it is a tight fit, lubricate the inside of the bushing with 3-in-1 oil or a similar
product. Set the impeller on top of the shaft so it sits level. Use a driving rod and mallet, on bushing only,
to drive the impeller onto the shaft until it is even with the end of the motor shaft. Do not hit with excessive
force or the bearings may be damaged.
4. Secure the impeller on the shaft with supplied locking screws (2).
5. Cover the bushing with the hub cap gasket and hub cap. Lock in place with two screws supplied.
6. Select the orientation of the fan housing. There are eight possible orientations.
7. Remember, if the fan is being installed in a weather hood, the motor will be upside down. Use eight Hex
head screws to secure the motor assembly to the fan housing. Inspect visually and test electrically before
installing the fan. Ensure the teflon gasket is in place.
(See Illustrations)
NOTE: Any new assembly parts or mounting hardware sourced must be 316 Stainless Steel.

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3.3 Illustration: PSS Series –PSS20 and PSS35

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4Plastec Jet Series
4.1 Disassembly Instructions
Before beginning these instructions, place this fan on a bench or table top that can support its weight.
1. Disconnect the fan from its power source.
2. Open the switch box. Take note of the wire positions before removing them from the wiring terminal.
3. Unscrew the plastic locknut from the liquid tight fitting on top of the switch box and the one from the face
of the weather cover.
4. Gently pull the conduit and cable out of the top of the switch box and pull the conduit off the cable.
5. Push a short length of cable back into the weather cover. This provides slack for lifting the weather cover
off the manifold.
6. Remove the six or eight Phillips head screws from the base ring of the weather cover.
7. Lift the weather cover up and over the top of the manifold, being careful not to damage the cable.
8. If the motor is being replaced, be sure to retrieve the cable and strain relief connector from the wiring box.
Take note of the orientation of the wiring positions before removing the cable.
9. Take note of the orientation of the motor as it sits in the fan body. This is important for the reassembly
procedure.
10. Remove eight Torx head screws from the motor plate. Lift the motor assembly out of the fan body. Stand
on the cooling fan end of the motor. Refer to step #3 of the utility blower disassembly sheet.
(See Illustrations)
4.2 Reassembly Instructions
Before beginning these instructions, place this fan on a bench or table top that can support its weight.
1. Complete steps one through five of the Utility Blower assembly procedure.
2. Set the motor plate into the fan body in the same orientation as it was before being removed.
3. Secure the motor assembly to the fan body with eight Torx head screws.
4. Remove the lid from the wiring box. Install the strain relief connector and wire according to the motors
and wiring diagram. Close the wiring box.
5. Slide the manifold onto the outlet of the fan body. If it is a tight fit, use a rubber mallet to tap it into
position. Use careful strikes to avoid damaging the fan body or manifold. Do not use any adhesive or
hardware to secure the manifold. Make sure the drain hole in the manifold is clear from the fan housing
outlet.
6. Hold the weather cover over the fan assembly and feed the cable through the liquid tight fitting, from
inside to out, while lowering the weather cover over the fan assembly.
7. Push the weather cover down past the fan body so it is seated in the ring on the colored base. Pull any
additional slack out of the power cable. Align the holes around the base of the weather cover and the
colored ring. Secure it in place with 6 or 8 Phillips head screws.
8. Feed the power cable through the conduit and fit the conduit into the liquid tight fitting in the weather
cover. Screw the plastic lock nut onto this liquid tight fitting. Slide the other locknut onto the conduit and
make sure it is oriented correctly.
9. Feed the power cable through the liquid tight fitting on top of the switch box and fit positions as before.
Screw the second locknut onto the liquid tight fitting. Reconnect the power supply and close the switch
box.
(See Illustrations)

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4.3 Illustration: Jet Series

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5Roof Unit Kits
5.1 Roof Unit 15 –Roof Unit 30 Kit Assembly
1. Components of Roof Kit: Roof
Curb Cap, Motor Cap, Cap
Bracket, Exhaust Guard
2. Place the cap bracket on the
motor with the screwing inserts
upwards.
3. Fix the motor flange.
4. Place the O-ring seal.
5. Place the impeller.
6. Push in the impeller.
7. Screw the hub cap on the motor
shaft.
8. Install the hub cap.
9. Place the roof curb cap O-ring
seal.

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10. Place the roof curb cap on the
housing.
11. Screw the roof curb cap to the
housing.
12. Turn over the housing.
Reinforce the base before placing
the roof curb cap to support.
13. Place the motor/impeller part.
14-17. Screw the motor flange and
the cap bracket on the housing
indicated in the pictures.
15.
16.
17.
18. Do the correct wiring between
the switch and the motor,
respecting tension.

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19. Screw back on the terminal box
lid.
20-21. Place the motor cap and
secure with screws.
21.
22-24. Attach switch with screws
on the flat side of the motor cap.
23.
24.
25. Place the exhaust cap on the
outlet and attach with 4 screws.
26. Finished Assembly.

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5.2 Roof Unit 35 Kit Assembly

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6Electrical wiring
6.1 General Precautions
WARNING! This equipment should be installed, adjusted, and serviced by qualified electrical maintenance
personnel familiar with the construction and operation of the equipment and the hazards involved. Failure to
observe this precaution could result in property damage and/or serious bodily injury, including death.
HIGH VOLTAGE! Hazard of electrical shock. Disconnect incoming power before working on this control.
WARNING! Wait at least five (5) minutes after turning off the input power supply before performing maintenance
or an inspection. Otherwise, there is the danger of electric shock.
CAUTION! Proper grounds, disconnecting devices and other safety devices and their location are the
responsibility of the user and are not provided by Plastec Ventilation Inc.
WARNING! For equipment protection, install a ground leakage type breaker with a fast response circuit capable
of handling large currents. The ground fault protection circuit is not designed to protect against personal injury.
6.2 Diagram
Note: For MSS0336PTT AND MSS0754PTT motors, motors
are set for high voltage CW.
CW: Clockwise
CCW: Counter-clockwise
6.3 Example: CW High Voltage
Housing positioned on the right side of the wiring box
displayed.