Titus UnderFloor Products User Manual
Underfloor Products
INSTALLATION MANUAL
Underfloor Products
LHK
PFC
TAF-D
TAF-G
TAF-HC
TAF-R
TAF-V
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LHK and PFC Underfloor Fan Powered Terminals
Underfloor Products IOM
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 (available on LHK only) 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.
Floor Supports
The units can be mounted directly on the slab. If isolation from the slab is
necesary, the unit can be placed on a rubber or cork pad.
Access to the motor, blower,and damper assebmly is on the top of
the unit. The access and control enclosure doors are sectioned so
that each door is aligned with a floor panel.
Note: If equipped with pneumatic controls the terminal must 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 indicating UP.
Minimum Access
Fan Powered terminals require sufficient clearance to service the fan
blower assembly, low voltage controls and line voltage motor controls or
electric heat section from the top of the unit.
For top access panel removal, 2” minimum vertical clearance above the
unit is recommended, plus sufficient horizontal clearance to slide the access panel clear of the top of the unit. Horizontal clearance is dependent
on access panel dimensions as indicated on product submittals.
Low voltage control enclosure doors are “L” shaped to allow access from
the top and sides. For low voltage control enclosure access, a minimum
of 18” clear 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.
Duct Connections for LHK
Slip each inlet duct over the inlet collar of the terminal. Fasten and seal
the connection by the method prescribed by the job specification.
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.
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.
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LHK and PFC Underfloor Fan Powered Terminals
Figure 1. LHK
Underfloor Products IOM
Figure 1. PFC
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Installation Manual - Underfloor Products
3
Field Wiring
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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 writeup, 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.
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.
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
424-14 and 250.
Please read all labels on a typical unit, before beginning installation. If you have any questions, please contact the local Titus Rep-
resentative for clarification. Have the key points from the AirFlow label
available for reference before calling.
DLHK
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Installation Manual - Underfloor Products
AIR
FLOW
UP
303155001015
FAN UNIT
MODEL NO.: DLHK CODE: 88-XXXXX-A 2 REV: 02
MOTOR VOLT: 277 PHASE: 1 HZ 60
HP: 1/3 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. Figure 4.
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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.
Fan Flow Adjustment
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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!
2. All foreign materials should be removed from duct system. Filters
should be installed where required.
3. Motor is shipped from factory at full speed setting. Allow motor to
run-in at least 15 minutes before adjusting speed. During initial runin, 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 side of the line voltage motor 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 (LHK only), 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.
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Installation Manual - Underfloor Products
5
Maintenance Procedures, Fan and Motor
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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 airflow:
a. Check for ductwork restrictions. Dirty air filters. Clogged water coils.
b. Re-adjust fan speed 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 four hex nuts from the mounting lugs holding the fan assembly to the discharge panel, and lower the assembly. Do
not allow assembly to hang from wiring.
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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