Titus Vertical Stack IOM - Manual (Page 4)

VERTICAL STACK VS-IOM-00 01-19-09
INSTALLATION AND
MAINTENANCE INSTRUCTIONS
6 f o 4 e g a P
7.
OPERATION AND CONTROL
7.1 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
7.2 An external thermostat (normally wall mounted) is used to select the desired room
temperature.
7.3 Where the unit is provided with electric heating (optional), the external 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.
8.
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.
8.1 If you are working on any internal part of the unit other than filter replacement or drain
pan inspection, you must also switch OFF the power at the supplied electrical source
(circuit breaker).
8.2 Remove the front access panel by removing (2) fastening screws or turning the two (2)
1/4-turn fasteners (optional) at the bottom of the panel and lifting it up off the top
channel. Switch OFF the power with the disconnect switch mounted on the internal
electrical box.
8.3 At the completion of any maintenance check for foreign materials, switch ON the power
at the disconnect switch mounted on the internal electrical box and replace the front
access panel by hanging it on the upper channel and turning the two (2) fastening screws
or (2) 1/4 turn fasteners (optional). Switch on the power at the supplied electrical source
(circuit breaker).
8.4
Filter Replacement
The useful life of the throwaway filter provided with the unit depends on the environment
in which the unit is operating. However, it is recommended to change the filter at least
every three (3) months.