Defrost - FWE AirScreen Series Operating Instructions Manual

FWE
REFRIGERATED "AIRSCREEN" SERIES
PERFORMANCE & DEFROST
PERFORMANCE (CONTINUED)
10. Trays: During open door use all ten (10) trays should be kept loaded even if empty. Do
not allow trays to extend out of the AirScreen during open door use. These procedures
will help hold cold air in the unit and maximize open door times.
11. Reloading: Once all food product has been used, and prior to reloading the AirScreen,
close the door for at least 45 minutes. This will allow for the air curtain to go through a
defrost cycle and cool back down to temperature. After reloading unit with cold product
follow all procedures outlined in the operation section under loading.
12. Defrosting: Proper defrosting is essential to performance. Defrost is automatic however
additional manual defrosts are advisable when conditions are not optimal.
13. Condenser coil: Clean regularly for best performance.
14. Door gasket: Inspect and clean regularly to maintain a good seal.
Additional performance notes:
1. There is a time lag between the cabinet air temperature and the actual product temperature. The
product temperature can be 10°F (-12°C) to 25°F (-4°C) cooler than the temperature indicated by
the temperature display.
2. Moisture on the side walls and puddling in the cabinet after an open door session is normal.
Simply wipe inside of the unit out between open door sessions.
3. If you are experiencing some freezing on fragile products like salads it is advisable to cover these
with covers or plastic wrap.

DEFROST

Defrost cycles:
The ASU-10 model uses a sensor based defrost and there is no adjustment.
The R-AS-10 model uses a time based defrost.
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FWE Operating Instructions | Refrigerated "AirScreen" Series
FWE
REFRIGERATED "AIRSCREEN" SERIES
DEFROST (CONTINUED)
1. Automatic (door open time based) Defrost:
If the door is open for 45 minutes or longer the unit will go into an automatic defrost when
the door is closed.
2. Manual defrost:
Manual defrost is initiated by the operator. Manual defrost can only be started with the
door closed by pressing the manual defrost button on the front of the control. The light
above the manual defrost button will illuminate to let you know the unit is in defrost. It is
advisable, if time permits, to do additional manual defrosts especially after long door open
times or in higher humidity conditions.
3. Canceling Defrost:
The manual defrost button has a second function. When unit is in a defrost cycle it can
be canceled by pressing the manual defrost button. This starts a sixty second countdown
timer and after the countdown ends the cooling cycle will start. Allow at least two minutes
for evaporator coil to cool before opening door.
Important Note: Canceling a defrost cycle is not recommended.
Additional Defrost Information:
1. The defrost system is designed to allow proper defrosting of accumulated ice build-up on
the evaporator coil.
2. Internal cabinet temperature will rise during a defrost cycle.
3. The cooling system condenser/compressor is disabled during defrost.
4. During a defrost cycle the condensation water from the evaporator coil flows from the top
of the unit down a drain line into the condensate vapor pan where it is evaporated. Vapor
from this evaporating water can sometimes be visible and should be considered a normal
operating condition.
5. Defrost cycles take around 15 minutes. However it is advisable to allow a minimum of 45
minutes for a defrost cycle. This allows time for the cooling system to come back on and
bring the temperatures down.
DEFROST
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