Topaz TZ-12B, Owner'S Manual

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TOPAZ
™
Owner’s Manual
effect on the temperature display, since neither the
cooling nor heating functions are active. The tempera-
ture display displays the current room temperature.
4. To stop the fan, turn the unit off using the power
button.
OTHER FUNCTIONS:
Timer ON/OFF:
Use the following instructions to turn the unit ON or OFF
after a period of up to 15 hours.
1. To turn the unit ON after a preset period press the
TIMER button, while the unit is OFF. The display
will flash five times showing the current delay time in
hours. If a different time delay is required press the
Up or Down Hour buttons until the desired delay time
is displayed. This number can be any whole number
between 1 and 15 hours. When the desired value is
displayed release the key. The selected value will
flash five times and go blank, but the TIMER light
will remain on. The unit will start in whatever mode
it was in before the timer was set after the specified
delay time. Once set, the timer function can be
cancelled by pressing the TIMER button again.
2. To turn the unit OFF after a delay follow the same
procedure as turning the unit ON after a delay except
start by pressing the TIMER button when the unit is
running. The display will flash the OFF delay time
five times, then the display will revert back to the
normal temperature display. The timer light will be
on when the OFF delay is active. The delay can be
canceled by pressing the TIMER or turning the
unit OFF.
Sleep:
Press the SLEEP button to raise the setpoint temperature
1˚F when in the cooling mode one hour after the button is
pressed. The unit will run in this mode until it is canceled
by pressing the SLEEP button again or turning the unit
OFF.
PREVENTIVE MAINTENANCE:
TOPAZ air-conditioning units provide high performance
and reliability with a minimum amount of maintenance.
To prolong the life of the unit and insure a high level of
performance, perform regular maintenance as described
below.
The refrigeration and electrical circuits of the
system should be serviced by qualified technicians
only. Always disconnect the unit from its
power supply when performing any form of service
requiring the removal of grilles or panels.
Filters:
Dirty filters can restrict airflow causing the unit to oper-
ate with a reduced efficiency. Inspect the filters every six
weeks or more frequently, when operating in a dirty en-
vironment. Replace the filters when dirty with an equiva-
lent filter. Do not attempt to clean the filters or operate
the unit without filters. On the TZ-18B through TZ-36B,
the filters can be removed by snapping the return air and
condenser air grilles out of the unit by pulling on the
handle at the bottom of the grille. The bottom of the grille
will snap out and the grille can be lowered a few inches
to clear the retaining tabs at the top. The filters are held
in place with plastic clips that can be rotated clear of the
filter. Reverse the procedure for replacing the filters. Pay
attention to the proper direction of air flow indicated on
the new filter.
The TZ-60B filters are accessed the same as the smaller
units except the snap-in clamps have been replaced
with screws at the bottom of the grilles that have to be
removed before the grille can be detached. Additional
retainer clips are not used on the larger units. The grille
acts as the filter retainer.
Coil Cleaning:
If the coil becomes dirty it can be cleaned using a vacu-
um followed by compressed air. Vacuum the face of the
coil where the air enters the coil. Most of the dirt will
be on this side. Use compressed air to blow any remain-
ing dirt out. Work from back to prevent driving the dirt
further into the coil. Keeping clean air filters in place will
greatly reduce the frequency that coils must be cleaned.
Blowers and Blower Motors:
There is nothing that can be serviced on these compo-
nents other than inspecting the blowers and blower mo-
tors to insure they are clean. The blower and motor bear-
ings are lubricated and sealed at the factory, and require
no additional lubrication. Dirt on the blower wheels can
be cleaned off with a rag. Dirt should not be a problem if
the air filters are properly maintained and kept in place.
Belt Tension, (TZ-60B, 60B3, 60B4 Models only)
The condenser fan on the TZ-60B series of air condition-
ers uses the only blower/motor combination that incor-