Titus Fan Powered Term User Manual

TU-FB-IOM 08-26-13

Fan Powered Terminals VAV Terminals

Receiving Inspection

After unpacking the terminal, check it for
shipping damage. If any shipping
damage is found, report it immediately
to the delivering carrier. Store units in a
clean dry location and do not stack more
than four high.

Caution: Do not use the inlet collar,
damper shaft, flow sensor or air
tubing as a handle to lift or move
assembly. Damage to the unit or
controls may result.

Before installation, remove fan packing
and all foreign material from the unit.
Check the blower wheel

for free rotation.

Supporting the Assembly

Suspend the unit from the building
structure in a horizontal plane with the
access panels facing downward.

Do not obstruct the access panels
with support channels or straps.

One inch long sheet metal screws can
be used to penetrate the casing (see
Figure 1). Use the support method
prescribed for the rectangular duct on
the job specifications. Unit may be
equipped with optional hanging brackets
(see Figure 2). Hanger rod up to 7/16"
diameter may be used.

The diameter of the inlet duct “D” in
inches must

be equal to the listed size of
the terminal; e.g. a duct that actually
measures 8 inches must be fitted to a
size 8 terminal. The inlet collar of the
terminal is made 1/8" smaller than listed
size in order to fit inside the duct (see
Figure 1).

Important: Do not insert duct work
inside the inlet collar of the
assembly.

Inlet duct should be installed in
accordance with SMACNA guidelines.
Rectangular discharge opening is
designed for flanged duct connections.
Fasten and seal

by method prescribed

in the job specification.

If single-point electronic velocity sensor
is used, 3 to 5 inlet duct diameters of
straight duct should be provided at the
terminal inlet.

Minimum Access

Fan Powered terminals require sufficient
clearance to service the fan blower
assembly and internal actuator (if so
equipped) from the bottom of the unit,

Straps

low voltage controls from the side of the
unit, and line voltage motor controls or
electric heat section (if so equipped)
from the rear or discharge of the unit.

For bottom access panel removal, 3"
minimum vertical clearance below the
unit is required, plus sufficient horizontal
clearance to slide the access panel clear
of the bottom of the unit. Horizontal
clearance is dependent on access panel
dimensions as indicated on product
submittals.

For low voltage control enclosure
access, a minimum of 18" is
recommended. Specific control
enclosure location is indicated on
product submittals. Panel for low voltage
enclosures are removable (not hinged).
For line voltage motor controls or electric
heat control access, a minimum

of 36"
should be provided to allow full opening
of hinged access doors. Specific location
is indicated on product submittals.

Important: These recommendations
do not preclude NEC or local codes
that may be applicable, which are
the responsibility of the installing
contractor.

Note: If equipped with pneumatic

control

s, or unit is parallel fan type

(Model TQP or FLP), the terminal must

Discharge

D

be mounted right side up. It must be
level within ±10 degrees of horizontal,
both parallel to the air flow and at the
right angle of air flow. The control side of
the terminal is labeled with an arrow

Figure 1.

Access Panel

(Entire Bottom is

Removeable)

indicating UP.

Hanger Rod

Duct Connections

Slip each inlet duct over the inlet collar

Optional

Hanger

Bracket

of the terminal. Fasten and seal the
connection by the method prescribed by
the job specification.

Discharge

1 1/2"

1 1/2"

Figure 2.

This IOM is meant to demonstrate general product details. The drawings are not meant to detail every aspect of the product. Drawings are not to scale. Titus reserves the right to

All rights reserved. No part of this work may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or by any information storage retrieval s ystem without permission in writing from Air Distribution Technologies.

make changes without written notice.

Air

Flow

Air

Flow

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TU-FB-IOM 08-26-13

Field Wiring

All field wiring must comply with the
local codes and with the National
Electrical Code (ANSI/NFPA 70-1996).
Disconnect switches are optional
equipment. Electrical, control, and piping
diagrams are shown on the exterior
labeling or on a diagram on the inside of
the control and high voltage enclosure

covers. Unless specified otherwise in
the order write-up, all units are wired for
a single point electrical connection to the
fan and optional electrical heater. All
electric heaters if provided by TITUS are
balanced by kW per stage. The installing
electrician should rotate incoming
electric service by phase in order to help
balance the building electric load.

Caution—Electrical Requirement:

1. Provide a safety disconnect per

NEC 424-19, 20 & 21.

2. Disconnect all incoming power

before wiring or servicing unit. All
disconnect switches on the terminal
(if so equipped) should be in OFF
position while making power
connections.

3. All field wiring must be in

accordance with NEC and local
code requirements. All units with
electric heat should have copper
wires for 125% of Nameplate
Amperage.

4. Observe wiring diagram and

instructions mounted on the unit.
480 V/3 phase units require a 4th
(neutral) wire in addition to the full
sized ground wire. All units must be
grounded as required by NEC 424­14 and 250.

Unit Labeling

Each unit will have two main labels
attached to the casing. The FAN UNIT
label (Figure 3) lists the Model Number,
Supply Voltage requirements, Motor
Horsepower, and Overcurrent Protection
requirements. The AIR FLOW label
(Figure 4) lists the Model Number, Unit
Size, Factory Order Number, and
Location. The Location (or "Tag")
indicates the engineer's planned
location for the unit to be installed.
There may be other labels attached to
the unit, as options or codes may
require.

Control Start-up, Operation

Detailed information regarding power,
accessory and communications
connections, start-up and operating
procedures for the TITUS TD-1
controller (digital) or pneumatic and
analog controls are available from your
local TITUS representative. For specific
information on controls by other
manufacturers contact that
manufacturer’s local branch or dealer.

Note: Controllers may incorporate
specific communication addresses
based on Building Management
Systems Architecture, and original
engineering drawings. Installing the
terminal in a different location than
noted on unit label may result in
excessive start-up labor.

Primary Air Damper

TFS, TQS and TQP Models:

To replace

a. Disconnect power before servicing.

the damper blade and/or

shaft assemblies:

Remove control enclosure cover to
access actuator.

MODEL NO.: DTFS CODE: 88-XXXXX-A 2 REV: 02
MOTOR VOLT: 277 PHASE: 1 HZ 60

HP: 1/4 FLA(EA) 1.4

HEAT VOLT 277 PHASE 1 HZ 60

KW 6.0 AMPS 21.66
MOTOR (S) ARE THERMALLY PROTECTED
MIN. SUPPLY CIRCUIT AMPS: 24 AMP
MAX. FUSE OR OVERCURRENT PROTECTION: 30 AMP
MAX. OUTLET AIR TEMPERATURE: 200F
UNIT DESIGNED TO OPERATE AT NO LESS THAN 0.2 IWG STATIC PRESSURE
ZERO CLEARANCE FROM UNIT, CONNECTED DUCT AND/OR PLENUM
TO COMBUSTIBLE MATERIAL

Figure 3. FAN UNIT Label

DTFS

b. Note position of damper shaft, using

indicating arrow. Loosen linkage or
actuator collar to allow damper to
rotate freely.

c. Remove bottom access door to

expose damper assembly. Rotate
damper to fully closed position,
exposing rivets holding damper
blade to shafts.

d. Drill out rivets using 1/2” drill, rotate

damper to fully open position, and
slide damper and/or shaft
assemblies out of the duct.

e. Fit new damper and/or shaft

assemblies in place, using 1/4-20
screws with lock nuts to replace
rivets.

everse procedure in steps c, b,

f. R

and a, for assembly. When locking
down actuator linkage or collar,
position indicating arrow on damper
in the same location as before the
repair.

FLS and FLP Models:

These units use an opposed blade
damper assembly that is not repairable.
The entire assembly must be replaced.

FAN UNIT

AIR

FLOW

C12

UP

Please read all labels on a typical
unit, before beginning installation. If

you have any questions, please contact
the local TITUS Representative for
clarification. Have the key points from
the Air Flow label available for reference
before calling.

303155001015

Figure 4. AIR FLOW Label

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TU-FB-IOM 08-26-13

Standard PSC Motor Fan Flow
Adjustment

Note: Before starting fan motor, follow

steps 1 and 2.

1. Discharge ductwork should be
connected. The minimum
recommended discharge static
pressure is 0.2" wg. Be sure fan
packing is removed from units with
fan packing!

2. All foreign materials should be
removed from duct system. Filters
should be installed where required.

3. Standard PSC motors are shipped
from factory at full speed setting.
Allow motor to run-in at least 15
minutes before adjusting speed.
During initial run-in, check ductwork
connections for leaks and repair if
necessary. (Do not adjust fan speed
down if ductwork is not connected).

4. Unit is equipped with manual fan
speed control, mounted on the
bottom of the line voltage motor
enclosure or electric heat
enclosure. Turning the control
counterclockwise will reduce the fan
speed; clockwise will increase
speed.

5. Set the unit to full heating
(maximum induction). Adjust and
set remote balancing dampers, if
present. Adjust the speed control to
deliver the required CFM by
measuring air quantity at the room
outlets.

6. Proceed to primary air adjustment
procedure, detailed in control
installation information. Fan should
be re-adjusted with primary air and
ventilation air at maximum setpoint,
to insure that no supply air is
discharged at the induction port.

Maintenance Procedures:
Fan and Motor

Motor is equipped with permanently
lubricated bearings. Inspect fan and
motor assembly for accumulation of dust
and dirt as required by operating
environment. Clean as necessary.

If fan motor does not run:

a. Free rotation of blower wheel fan

packing removed. Freight or
installation damage.

b. Check for proper unit power

Disconnects should be ON .Check
optional fusing.

c. Check for proper control signal, P/E

switch setting, proper air control 24
Vac at fan contactor, coil energized.

If fan motor runs, excessive noise:

a. Clearance problems on blower. All

components securely attached.

b. Verify integrity of ductwork. Leaks

or loose connections. Rattling
diffusers or balancing dampers.

c. Maximum CFM too high, or

discharge static pressure too low

If fan motor runs, insufficient air flow:

a. Check for ductwork restrictions.

Dirty air filters. Clogged water coils.
b. Re-adjust fan spee d control.
c. Discharge static pressure too high.

If repair or replacement is required:

Motor and fan should be removed as an

assembly. Disconnect all power

before servicing. Remove the hex

nuts from the mounting lugs holding

the fan assembly to the discharge

panel, and lower the assembly. For

model TFS, lift the motor / blower

assembly to release the tabs from

the discharge panel, then lower the

assembly. Do not allow assembly to

hang from wiring.

Optional Water Coil Cleaning

In most cases, the supply side of the
water coil (optional) can be cleaned by
removing the bottom access door and
cleaning the coil face through the open
space between the motor / blower
assembly and the unit casing.

If more space is desired to clean the
water coil, the motor / blower assembly
may be removed and reinstalled as
described above.

If removing motor from blower, first

loosen the set screw holding the

blower wheel to the motor shaft.

Remove the three screws holding

motor to the fan housing, and slide

motor and fan housing apart.
Reverse the procedure for assembly.
Note: Over tightening motor mounting

screws may crush isolation bushings,
causing excessive fan noise.

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