BREEZAIRE WKL 1060 - Manual (Page 4)

WKL 3/11 PG 4
Operation
On initial start-up the cooling unit will reduce the temperature of the enclosure slowly. The unit may run constantly or cycle
off for short periods. The time required to reach the desired temperature will vary, depending on the enclosure construction
and contents.
The Sentry III is factory set to approximately 55°Fahrenheit. Unless the temperature falls below that which is desired, do
not change the thermostat setting for at least 3 days.
During normal operation the Sentry III readout will display the temperature of the air entering the intake of the cooling unit.
If the optional bottle probe is installed the intake air sensor will be disconnected and the temperature of the probe will be
displayed. The temperature being displayed is also the temperature used by the control system to turn the cooling unit on
and off.
After initial cool down, the "on-off" cycle should be relatively constant. The percentage of "off " time will depend on
enclosure's construction, placement of unit, contents, and surrounding outside temperatures. If it is necessary to adjust the
temperature of the enclosure; adjust the thermostat to a colder temperature while the unit is running and to a warmer
temperature while the unit is off. The set point can be adjusted no lower than 48°F or higher than 63°F. NOTE: If the
enclosure is not cooling to the current set point, lowering the set point temperature further will not help. (See ENCLOSURE
PROBLEMS section)
The Sentry III set point, desired enclosure temperature, may be changed by pressing and holding the "SET" button while
momentarily pressing the "COOLER" or "WARMER" button. When the "SET" button is pressed the readout will
automatically change and display the current set point temperature
Should the operation of the cooling unit be interrupted by a power outage or by raising the set point temperature while the
unit is running the Sentry III's internal delay will be activated and the unit will not restart for approximately three (3) minutes.
NOTE: This delay may also occur on initial power-up. Please see the Sentry III+ Owners Manual.
MAINTENANCE
The BREEZAIRE cooling unit requires very little maintenance. To maintain optimal performance, the condenser coil should
be inspected and cleaned every 3 months. Remove the exhaust condenser grille located outside the enclosure and use a
vacuum (with brush attachment) to remove dirt and lint from the fins of the condenser coil.
If the condenser coil becomes blocked preventing proper air flow the unit will over heat causing a loss in cooling
efficiency and will result in a failure of the unit not covered under warranty.
ENCLOSURE PROBLEMS
BREEZAIRE is extremely proud of the quality and reliability of its products. Experience has shown that of the small number
of problems encountered, the large majority are due to improper unit selection or enclosure construction. Should the
cooling system be suspected of malfunctioning, check the temperature of the air being exhausted from the upper part of the
warm air exhaust condenser grille. If it is warm, the unit is working. A further check may be made by comparing the air
temperature entering the lower grille on the cold side (Evaporator side) with that leaving the upper cold side grille. (see Fig.
1) If the air leaving the unit is 6°F or more degrees colder than the temperature entering, the unit is working properly. In
some cases, improper placement or installation may cause the unit's performance to be compromised. In situations where
the ambient relative humidity is very low, the desired enclosure relative humidity may not be achieved without adding
moisture. To add moisture to the enclosure only use slow, natural evaporation from a small porous water container. Do not
use a humidifier.
Improper placement or installation may cause the unit's performance to be degraded. If the unit is exhausted into a confined
area with poor ventilation or duct work, it will not be able to reject the heat and moisture it is removing from the enclosure
and a malfunctioning unit will be suspected. If an obstruction to the flow of fresh air into or from the cooling unit (see Fig. 3)
is stopped or restricted for any reason the unit could heat rather than cool the enclosure.
NOTE: Should this condition develop the Sentry III will turn the unit off when the enclosure temperature rises to
approximately 75°F, the unit will not restart until the enclosure temperature is lowered to approximately 65°F or the unit is
disconnected and then re-connected to the power supply. This feature is disabled for approximately 45 minutes after the
unit is connected or re-connected to a power supply to allow initial cooling of enclosure. Please see the Sentry III+
Owner's Manual.
Proper sealing of the enclosure through the use of a vapor barrier and weather stripping cannot be over emphasized. The
unit will not be able to maintain the proper conditions if fresh; moisture-laden air is constantly being introduced into an
improperly sealed enclosure. Symptoms of this condition are; unit runs all the time with only a slight reduction in enclosure