6
MODELS: TVA, TVE & TVS IOM Manual
MAINTENANCE INSTRUCTIONS
Safety
1.
Always isolate the unit electrically before removing the front access panel. Do this by opening
the circuit breaker (or other switching device) in the distribution panel in the suite. Do not
use the fan switch as the means of isolation. There is a high risk of electrocution if the
unit is improperly isolated. If in doubt have a qualified electrician perform the service work.
2.
Ensure that the fan has stopped rotating before proceeding to work within the unit.
3.
If the unit is equipped with a fuse or circuit breaker, do not change out either of these devices
with ones of a higher Amp rating. The purpose of a fuse or circuit breaker is to protect the
power wiring to the unit.
4.
Take care when working inside the unit. Sheet metal components may have sharp edges.
5.
If the black acrylic coating on the glass fiber cabinet liner is damaged, it must be patched to
prevent glass fiber particles entering the air stream.
Every 3 Months
Replace the filter. The filter can be one of two types: a 1” thick cardboard framed type or a wire
frame with filter media attached.
1.
Unit with a return air / access panel secured by ¼ turn fasteners
- Remove the panel by
rotating the fastener head a ¼ turn counter-clockwise. Pull the top edge of the panel
forwards and unhook the bottom edge. Slide out the filter. Fit a new filter and replace the
panel.
2.
Unit with a hinged filter door in the upper half of the grille panel –
Grasp the bottom edge
of the door and sharply pull the door forwards. Lift the door to the horizontal position. The
filter is now accessible and is removed by sliding it upwards out of the channels behind the
grille.
Annually (before the start of the cooling season)
Remove the return air/access panel from the wall. Remove the two sheet metal screws which secure
the panel that shields the fan assembly. Pull the shield panel sharply downward and remove.
1.
Vacuum the drain pan and check that the drain outlet is not blocked. Pour water into the pan
and check that it drains quickly. If it appears to be partly blocked, remove and clean the drain
hose beneath the pan.
2.
If the coil surface is dirty, vacuum the surface which faces the room. Take care not to
damage the aluminum fins on the coil. If the fins are flattened, the performance of the unit
will be reduced.
3.
Inspect the surface of the cabinet liner for evidence of dampness. The liner should be
completely dry in all areas. Vacuum excessive dust from the liner, taking care not to damage
the black acrylic coating on the liner. Do not run the unit if the liner is damp as this can
promote mold growth. Determine the cause of the dampness. If there is evidence of mold
growth it might be necessary to replace part or all of the liner. If in doubt consult a
remediation specialist.
4.
Replace the thermostat battery if supplied..
The following components do not require routine maintenance:
Fan, fan motor, control valve, electric heater (fan coil model TVE), thermostat.
Note that fan motors have sealed bearings and do not require additional lubrication. Older units
may have oiler tubes into which are added a few drops of SAE-20 non-detergent oil every 6 months.
