INSTALLATION INSTRUCTIONS:
Vertical Basic Fan Coil Series
VBC, VBF, VBA, VBL
INSTALLER MUST BE A TRAINED, EXPERIENCED SERVICE
TECHNICIAN
1. PRESSURE CHECK
The complete unit including coil, valve package and associated piping is shipped
pressurized. Use the air valve to release the pressure. Should there be no pressure,
inspect the unit for possible shipping damage. The unit must be pressure tested again
prior to installation.
2. MOUNTING
2.1 The unit is to be located on a leveled surface at the designated location against a wall
or a solid partition. When leveling legs (optional) are supplied, these are located
under the unit’s legs (2 per leg). Turn the bolts as required until the unit is perfectly
level to ensure proper condensate drainage.
2.2 Once leveled and connected, the unit should be bolted to the back wall in such a
manner that will prevent tip-over. Exception: Due to its wider base, the VBC does not
have to be bolted to the back wall.
3. PIPING
3.1 All piping leading to the unit must be adequately supported to prevent excessive stress
on the unit’s piping. However, sufficient free movement is required for thermal
expansion/contraction.
3.2 Do NOT over-tighten threaded connections.
3.3 Do NOT overheat sweat connection. Use solder (95/5) with a m elting temperature
below 600oF.
3.4 When the valve package is supplied separately for field installation, carefully follow
the schematic piping diagram and installation instructions provided with the package.
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3.5 All pipes and fittings that extend beyond the drain pan MUST be insulated.
3.6 The inlet and outlet points are clearly marked on the unit’s piping. Depending upon
the field piping layout, the connecting inlet, outlet and condensate piping could be
routed from the back of the unit or from the bottom.
4. OUTSIDE AIR DAMPER (OPTIONAL) – VBC, VBF, VBA ONLY
4.1 Outside Air Duct Connection
The unit is provided with an outside air intake opening at the back which leads to the
built-in outside air damper. The installing contractor should build a duct to match the
size of the opening. This duct should be connected via a duct collar to the unit, on one
side, and to an outside weather louver on the outside wall. This installation does not
form part of the unit supply.
4.2 Damper Setting
The factory setting is for the damper to fully open when energized. However, should a
smaller quantity of outside air be required, the degree of opening of the damper blade
can be adjusted as follows:
4.2.1 Remove the front panel of the unit and remove the filter.
4.2.2 Open the Wing-nuts securing the outside air damper assembly and slide it out to gain
the better access.
4.2.3 Energize the motor until damper is in the fully open position.
4.2.4 While in the fully open position, loosen the set screw holding the damper shaft to
the damper motor.
4.2.5 Adjust the position of the blade to the desired angle and tighten the set screw.
4.2.6 Reassemble the unit.
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5. ELECTRICAL
5.1 All electrical connections are to be made in accordance with the National Electric
Code, state and local codes, bylaws, ordinances or the authority having jurisdiction.
Make all electrical connections inside the internal electric junction box by carefully
following the wiring diagram.
5.2 Electrical wiring diagram is located inside the unit’s enclosure. Adhere strictly to it in
order to avoid damage and/or personal injury.
6. GENERAL PRECAUTIONS
After completing the installation, recheck the following:
6.1 The drain pans, fans and motors are clean of all foreign material.
6.2 All electric wiring is properly routed, secured and capped.
6.3 The filter is clean and secured in its position.
7. INITIAL START-UP
7.1 Chilled/Hot Water Unit
7.1.1 Ensure that the main distribution system is operable (i.e. both supply and return piping
are under full operating pressure).
7.1.2 Open the unit’s isolating ball valves (optional) and observe that no leaks are evident.
7.1.3 Open the 2-Way or 3-Way Valve (optional) manually by moving the lever provided on
the valve motor thus pressurizing the unit’s coil.
7.1.4 Remove the cap of the air-vent valve and depress the needle to release the trapped air.
Continue until only liquid is coming through and then re-cap and secure tightly.
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OPERATING & MAINTENANCE
INSTRUCTIONS:
Vertical Basic Fan Coil Series
VBC, VBF, VBA, VBL
1. OPERATION AND CONTROL
1.1 The unit is wired to operate with a four-position fan selector switch:
OFF
HI High fan speed
MED Medium fan speed
LO Low fan speed
1.2 The thermostat (knob) is used to select the desired room temperature.
1.3 Where the unit is provided with electric heating (optional), the HEAT/COOL
changeover switch has to be set in the HEAT position to enable the thermostat to
switch the heater ON when the room temperature drops below the set point.
1.4 Through the Fresh Air Damper (optional) fresh air is introduced to the room
automatically when the fan is switched into any ON position. NOT available on VBL
models.
2. MAINTENANCE
***CAUTION: All maintenance must be performed by a trained, experienced
service technician. To prevent electrical shock, disconnect electric power to system
at main fuse or circuit breaker box until maintenance is complete.
Most maintenance work may be performed after removing the front panel. The panel
can be removed by using the appropriate screw driver or key (optional).
2.1 Filter
The useful life of the throwaway filter provided with the unit depends on the
filter at least every three months.
environment in which the unit is operating. However, it is recommended to change
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2.1.1 No tools are required to remove the filter on VBC, VBF, and VBA. Pull the filter
down from underneath the front panel (the filter rack ratates to allow removal and
replacement without removing the front panel), remove the filter, install replacement
in the track, snap the filter and track back up into place. For the BVL, remove the
front panel for filter replacement.
2.2 Drain Pans
Periodic cleaning of the drain pans is essential, especially in high humidity areas.
Remove all foreign material to ensure the free flow of condensation.
2.3 Coils
Clogged coils are a major cause of unit failure. Periodic inspection should take place
at least once a year.
2.3.1 Dirty coils should be cleaned with the appropriate brush and vacuum cleaner or
compressed air.
2.4 Electric Motor(s)
A yearly motor inspection should take place and the following is recommended:
2.4.1 Clean all dirt and lint with a brush and/or vacuum cleaner.
2.5 Strainer (Optional)
The frequency that the strainer has to be cleaned depends on the overall conditions of
the distribution piping system. However, frequent cleaning is recommended during the
installation and start-up stages and thereafter at every season change
(Summer/Winter).
2.5.1 Open the clean-out cap on the strainer to release the dirt. Close it once clear liquid is
observed.
2.6 Pete’s Plug (Optional)
The plug is installed as an aid in measuring pressure and temperature. For details refer
to the manufacturer’s instructions.
2.7 Electric Heater(s) (Optional)
The heater is fastened to the fan deck at the blower outlet with sheet metal screws.
In case of heater failure, follow the procedure described below:
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2.7.1 Disconnect all power sources before attempting to open the unit. Check all electrical
wiring to ensure the unit is fully isolated.
2.7.2 Unscrew the fan deck and expose the heater(s).
2.7.3 If the thermal cut-out switch is defective, disconnect the electrical wires and unscrew
it from the heater assembly. Obtain a replacement from TITUS and
reinstall.
2.7.4 If the heating element (the spiral resistance wire) is burned out, unscrew the heater
assembly from the fan deck, disconnect the terminals and replace with a new heater
obtained from TITUS.
***When contacting TITUS for replacement parts, always
refer to the complete Model and Serial numbers on the Serial Plate
located on the blower housing.
605 Shiloh Road
Plano, Texas 75074
972-212- 4800
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