Twin City IM-4800 User Manual

WPB - E - 24 - E - 4 - 16

Propeller Wall Fans

INSTALLATION, OPERATION & MAINTENANCE MANUAL

IM-4800

August 2014

Models: TCPE, WPB, WPD

Twin City Fan & Blower Catalogs 4800 and 4820 provide additional information on this equipment. These catalogs
can be found at www.tcf.com or by contacting your local Twin City Fan & Blower sales representative.

TCPE WPB WPD

Model Nomenclature

TCP E - 14 - 2 A

Design Vintage / Motor Type

Model TCPE, Direct Drive

E = Exhaust

Propeller Diameter

Model
WPD = Wall Propeller Fan, Direct Drive

WPB = Wall Propeller Fan, Belt Driven

E = Exhaust, S = Supply

Fan Size

Propeller Type

L1 & L2 = Level 1 & Level 2, Fabricated Steel, Fixed Pitch (5-Bladed)
E = Cast Aluminum, Adjustable Pitch (4 and 8-Bladed)
C = Cast Aluminum, Adjustable Pitch (4 and 6-Bladed)
Z = Fabricated Steel, Fixed Pitch (5-Bladed)

No. of Blades

Propeller Blade Angle (C, E, and Z, Level 3, Propellers Only)

A = Design A
AE = Design A with EC Motor

Speed
0 = 800 or 1350 RPM
1 = 1100 or 1500 RPM
2 = 1700 or 1650 RPM

©2013 Twin City Fan Companies, Ltd.

Receiving, Unpacking & Inspection

When the equipment is received all items should be
carefully checked against the bill of lading to be sure all
crates and cartons have been received. Before accepting
delivery, carefully inspect each carton or crate for
visible shipping damage. If any damage is noticed, the
carrier should make the proper notation on the delivery
receipt acknowledging the damage. Make notations of
all damage on all copies of the bill of lading and have
all copies countersigned by the delivering carrier. The
carrier should also fill out a Carrier Inspection Report.
The factory Traffic Department should then be contacted.
File claim for damage with the carrier. Physical damage
to the unit after acceptance is not the responsibility of
Twin City Fan Companies, Ltd.

Unpack each carton or crate and verify that all required
parts and proper quantities of each item have been
received. Refer to drawings for part descriptions. Report
shortages or missing items to your local representative
to arrange for replacement parts.

Storage

If fans are stored for any length of time, they should
be stored in a clean, dry location to prevent rust and
corrosion. Outdoor storage is not recommended. When
outdoor storage is necessary, fans should be protected
from the elements as completely as possible. Cover the
fan inlet and outlet and keep motors dry and clean.

For extended storage (more than 3 months) motor shafts
and bearings should be rotated monthly. If stored longer

Due to availability of carriers and truck space, it is not
possible to guarantee that all items will be shipped
together. Verification of shipments must be limited to
only those items on the bill of lading.

The unit nameplate must be checked to make sure the
voltage agrees with the power supply available.

CAUTION: Sheet metal parts, screws, clips and similar
items inherently have sharp edges, and it is necessary
that the installer and service personnel exercise caution.

The installation of this equipment shall be in accordance
with the regulations of authorities having jurisdiction and
all applicable codes. This equipment is to be installed
by an experienced installation company and fully trained
personnel. The mechanical installation of the exhaust
ventilator consists of making final connections between
the unit and building services, duct connections.

than 6 months, bearing grease in motor and fan should
be purged and replaced with compatible grease. Belts
should be rechecked for proper tension. Storage records
should be kept to assure proper maintenance. The
factory can advise warranty centers to provide motor
and bearing service if needed.

Limitation of Warranties and Claims

Seller warrants to the original purchaser that the
goods sold hereunder shall be free from defects in
workmanship and material under normal use and service
(except in those cases where the materials are supplied
by the buyer) for a period of one year from the date of
original installation or eighteen (18) months from the date
of shipment, whichever occurs first. The liability of seller
under this warranty is limited to replacing, repairing, or
issuing credit (at cost, F.O.B. factory and at seller’s
discretion) for any part or parts which are returned by
buyer during such period provided that:

a. Seller is notified in writing within ten (10) days

following discovery of such defects by buyer, or
within ten (10) days after such defects should
reasonably have been discovered, whichever is less;

b. The defective unit is returned to seller, transportation

charges prepaid by buyer;

c. Payment in full has been received by seller or said

products;

d. Seller’s examination of such unit shall disclose to its

satisfaction that such defects have not been caused
by misuse, neglect, improper installation, repair,
alteration, act of God, or accident.

No warranty made hereunder shall extend to any
seller product whose serial number is altered, effaced
or removed. Seller makes no warranty, express or
implied, with respect to motors, switches, controls,
or other components of seller’s product, where such
components are warranted separately by their respective
manufacturers. THIS WARRANTY IS EXPRESSLY IN LIEU
OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED,
WHETHER STATUTORY OR OTHERWISE, INCLUDING
ANY IMPLIED WARRANTY OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR PURPOSE. In no event
shall seller be liable to buyer for indirect, incidental
collateral, or consequential damages of any kind.
(BUYER’S FAILURE TO PAY THE FULL AMOUNT DUE
WITHIN SIXTY (60) DAYS OF DATE OF INVOICE SHALL
OPERATE TO RELEASE SELLER FROM ANY AND ALL
LIABILITY OR OBLIGATION ARISING PURSUANT TO
ANY WARRANTY, EXPRESS OR IMPLIED, WHETHER
STATUTORY OR OTHERWISE, INCLUDING ANY IMPLIED
WARRANTY OR MERCHANTABILITY OR FITNESS FOR
A PARTICULAR PURPOSE, MADE IN CONNECTION
WITH ANY CONTRACT FORMED HEREUNDER. BUYER
AGREES THAT SUCH FAILURE TO PAY SHALL
CONSTITUTE A VOLUNTARY WAIVER OF ANY AND ALL
SUCH WARRANTIES ARISING PURSUANT TO SUCH
CONTACT.)

2 Twin City IM-4800

Electrical Connection

1. Connect supply wiring to a disconnect switch.
Check the wiring diagrams on the motor for con­nections.

2. The motor is factory set at the voltage marked on
the fan nameplate. Check the line voltage with the
nameplate voltage and wiring diagrams.

3. The main power wiring should be sized for the
ampacity shown on the dataplate. Size wires in
accordance with the ampacity tables in Article 310
of the National Electrical Code. If long wires are
required, it may be necessary to increase wire size
to prevent excessive voltage drop. Wires should be
sized for a maximum of 3% voltage drop.

CAUTION: Use copper conductors only.

CAUTION: Protect wiring from sharp edges. Leave

some slack in the line to prevent damage.

4. (Optional) Disconnect switches are not fused. The
power leads must be protected at the point of dis­tribution in accordance with the fan dataplate.

Check, Test & Start Procedure

5. On fans without a thermal protector integral to the
motor (refer to unit or motor dataplate to determine
if protector is present) a separate overload device
is required. Refer to Sections 430-32 of the N.E.C.
for sizing.

6. All units must be electrically grounded in accordance
with local codes or, in the absence of local codes,
with the latest edition of the National Electrical
Code (ANSI/NFPA 70). A ground lug is provided as
standard in the unit terminal box. Size grounding
conductor in accordance with Table 250-95 of the
National Electrical Code. DO NOT use the ground
lug for connecting a neutral conductor.

7. Supply voltage to the power ventilator should not
vary by more than 10% of the value indicated
on the unit dataplate. Phase unbalance must not
exceed 2%.

WARNING: Failure of motor due to operation on

improper line voltage or with excessive phase unbal­ance constitutes product abuse and may cause
severe damage to the unit’s electrical components.

WARNING

Electric shock hazard. Could cause severe injury or
death. Failure to bond the frame of this equipment
to the building electrical ground by use of the
grounding terminal provided or other acceptable
means may result in electrical shock. Disconnect
electric power before servicing equipment. Service
to be performed only by qualified personnel.

BEFORE START-UP: Disconnect power to this unit
before servicing the unit.

1. Check to verify that the propeller is free to rotate.

2. Verify that supply voltage on the line side of discon­nect agrees with voltage on fan data plate and is
within the 10% utilization voltage.

3. Apply power to unit and check rotation of propeller
with the directional arrow on the unit.

WARNING: Rotation is critical. If allowed to operate

in the wrong direction, the motor will overload and
burn out.

WARNING: Especially check three-phase units for

rotation. For three-phase, rotation can be changed by
interchanging any two of the three line leads. If unit is
checked on temporary wiring, it should be rechecked

when permanently installed. Motor burn-out or tripped
overload protection devices are usually the result of
wrong rotation.

4. Electrical Input Check: Perform check of fan ampere
draw and verify that motor nameplate amps are not
exceeded. Take into account the service factor range
if motor is nameplated above a 1.0 service factor.

5. Fan RPM should be checked and verified with a
tachometer.

6. Units with Speed Control (TCPE): Verify that speed
controller gives desired operating range of RPM.
If minimum speed value is not desired, it may be
adjusted. See page 4.

NOTE: The fan should not need balancing, as it was

balanced at the factory to be within stringent vibration
levels before shipment. However, there are several
things that may cause vibration, such as rough han­dling in shipment and installation, weak foundations
and alignments.

Twin City IM-4800 3

Speed Control Installation

(Model TCPE - optional)

The controller is designed to start the motor at high
speed and will then slow down. This gives the motor
good starting characteristics.

Speed control is available using 115/60/1 open type
PSC or shaded pole motors.

Installation

Connect control in series with motor and line voltage
(115V only). Never connect across line. See Figure 1.

Minimum Speed Setpoint

All controls are factory set to 65V±3V output as stan­dard with an input voltage of 120V. If different minimum
speed is desired, the control may be adjusted by turn­ing minimum speed pot clockwise to decrease minimum
speed and counterclockwise to increase minimum speed.
Refer to Figure 2.

WARNING: If minimum speed is readjusted, verify unit
ampere draw does not exceed motor nameplate amps.
Do not operate unit in range where amp draw exceeds
motor nameplate.

CAUTION: These motors operate more efficiently in the
ranges set from the factory. Operating motor outside
these ranges (see Table 2) may cause motor to run
hotter and substantially shorten motor life.

NOTE: Lowering the minimum speed setpoint may
adversely affect motor start-up characteristics.

WARNING: Certain failure modes of solid-state controls
such as half-waving can cause high levels of DC, motor
overheating and motor burn-out. Therefore, a thermal
overload protection (integral with motor) is required to
limit the maximum motor temperature under such a
failure.

NOTE: Do not allow any sleeve bearing motor to
operate below 500 RPM. Operation below 500 RPM will
substantially shorten bearing life.

Figure 1. Connection Diagram, Speed Control

SPEED CONTROLLER

AC

LINE

(115V)

SWITCH TRI-AC

MOTOR

Table 2. Speed Controller RPM Range

HP RPM MAX. RPM MIN. RPM

1/8

1/8
1/6
1/4
1/2
1/6
1/4
1/2

1/3
1/2
3/4

NOTES:

1. Speed control available only with 115/60/1 open motors (thermally

2. Three-speed motor (multiple tap winding).

3. Speed control should not be connected to low speed tap on motor

4. Speed control connected to high speed tap on motor.

5. Speed control connected to medium speed tap on motor.

1650/1500/1350

1140 1140 900

1

1725 1725 1200

protected).

because of starting characteristics.

2,3

860 860 500

1650
1500

4

5

1300

950

4

5

Table 1. Speed Controller Size

MOTOR

HP RPM VOLTAGE

1650/1500/

1/8

1350

1/8 860 115V X
1/6 860 115V X
1/4 860 115V X
1/2 860 115V X
1/6 1140 115V X
1/4 1140 115V X
1/2 1140 115V X

1 1140 115V X
1/3 1725 115V X
1/2 1725 115V X
3/4 1725 115V X

115V X

SPEED CONTROLLER

DESIGNATION / FLA

KBWC-15K

5 AMP

KBWC-110

10 AMP

KBWC-115

15 AMP

Figure 2. Low End Setpoint Adjustment

SETPOINT
ADJUSTMENT
SCREW

NOTE: 5 amp model shown. On 10 and 15 amp
models, adjustment is made through clearance
hole in heat sink.

NOTE: For TCPE fans using Electronically Commutated
(EC) Motors, refer to IM-4055.

4 Twin City IM-4800

PANEL

MOUNTING

FRAMING

BOLTS TO

REMOVE FAN

WIRING
HOLE ‘A’

ROTATION

AIRFLOW

Panel Installation (without collar) — TCPE

1. The TCPE panel fan is an axial exhauster that can
be mounted either vertically or horizontally. Figure 3
depicts a typical wall installation.

2. A typical frame is usually roughed in so that the
inside square dimension is approximately 1⁄2" to 3⁄4"
more than what the fan panel measures. If using the
optional wall collar the frame should be

3

⁄4" to 1"

more than what the fan panel measures.

3. Place the unit into the frame with the wiring hole A in
the position that is most suitable for wire to enter the
unit. Fasten the unit to the frame through the holes
provided using lag bolts. If the electrical wire will be
coming from within the wall that the TCPE is being
mounted to, run the wire through hole A by entering
it from the orifice side of the panel. This should be
done before the panel is fastened to the frame to
reduce the need of disassembly. If the wiring is not
done during the installation the motor and guard can
be removed from the panel fan without having to
actually remove the panel itself. See Figure 3. Make
sure a strain relief is attached to the wires after the
wire is pulled into position.

CAUTION: Use copper conductors only.

CAUTION: Protect all wires from sharp edges. Do

not route wire through wiring hole without a strain
relief to protect it.

4. Connect the electrical wire to a disconnect switch
and then connect the wire to the motor (an optional
speed control may be installed in series with a 115V
ODP motor and disconnect switch). See Figure 1
on Page 4. The wiring diagram for the motor is on
a label attached to the motor. Main power wiring
should be sized for the amperage shown on the data
plate attached to the fan panel.

5. Disconnect switches (Optional) are not fused; there­fore, the power leads must be protected at the point
of distribution in accordance with the unit data plate.

6. All TCPE motors are thermally protected. All units
must be electrically grounded in accordance with
local codes or in accordance with the NEC. A
grounding point is provided with all motors and will
be described on the wiring diagram that is attached
to the motor.

7. Supply voltage to the motor should not vary by more
than 10% of the value indicated on the unit data
plate. Phase unbalance must not exceed 2%.

WARNING: Failure of the unit due to improper line

voltage or excessive phase unbalance constitutes
product abuse. Severe damage to the unit’s electrical
components may occur.

8. Make sure unit is properly sealed around the frame
edges so that the outside elements cannot enter the
building.

Figure 3. Typical Installation

TCPE

SIZE

8 13.25 13.75 10 x 10

12 18.25 18.75 15 x 15
14 21.25 21.75 18 x 18

18 25.25 25.75 22 x 22
20 27.25 27.75 24 x 24
24 30.25 30.75 27 x 27

PANEL

SQ.

WALL

OPENING

DAMPER

SIZE

'M' (MIN.)

14.010 15.25 15.75 12 x 12

14.016 23.25 23.75 20 x 20

14.0

Wall Opening Requirements

Wall opening size and the distance between propeller
and damper are two important dimensions for fan
installation. Fans mounted in or to the wall require a
different wall opening size than those mounted in collars.
Propeller-to-damper distance (M) is important to reduce
turbulence at the damper, which may lead to premature
damper failure, and to prevent the propeller blades from
hitting the actuator on motorized damper units.

Figure 4. Fan Assembly Without a TCPE Wall Collar

M" (Min).
BACK OF

FAN TO

FAN

DAMPER

DAMPER

(EXTENDED FLANGE)

WEATHERHOOD

Twin City IM-4800 5

FIELD

FABRICATED

WALL COLLAR