User Manual for WTF Freezers
Beverage-Air
Rev. 07/22
Beverage-Air
12
SEQUENCE OF OPERATIONS FREEZER
The freezer operates based on the air temperature measured by the probe located at the return air.
ON
OFF
COMPONENT
OPERATION
CONTROLLER
ACTION
OPERATION
CONTROLLER
ACTION
COMPRESSOR
Compressor turns
on when the air
temperature at the
probe is above the
sum of the set point
+ 2.5
The Compressor Contact
is energized
Compressor turns
off when the air
temperature at
probe is equal to
or less than the set
point – 2.5
The Compressor Contact
is de-energized
(ERC 112 - Terminal #1)
(
ERC 112 - Terminal #1
)
CONDENSER FAN
The Condenser
Fan turns on when
the Compressor is
running
The Condenser Fan is
wired directly to the
Compressor, not through
the controller
The Condenser Fan
turns off when the
Compressor is not
running
The Condenser Fan is
wired directly to the
Compressor, not through
the controller
EVAPORATOR
FAN
The Evaporator
Fan turns on when
the Compressor is
running.
The Evaporator Fan is
wired to the Fan Contact
The Evaporator Fan
turns off when the
Compressor is not
running.
The Evaporator Fan is
wired to the Fan Contact
(ERC 112 - Terminal #5)
(
ERC 112 - Terminal #5
)
DEFROST HEATER
The Defrost Heater
will activate
on cumulative
Compressor runtime
of 6 hours, and when
temperature drops
too low
The Defrost Heater
Contact is energized
When either the
defrost is not
scheduled or the
temperature at
defrost probe
has reached the
defrost termination
temperature.
The Defrost Heater
Contact is de-energized
(
ERC 112 - Terminal #6
)
(
ERC 112 - Terminal #6
)
FACE/DOOR
HEATERS
The Face & Door
Heaters turn
on when the
Compressor is
running
The Door/Face Heater
are wired to the
Compressor Contact
The Face & Door
Heaters turn
off when the
Compressor is not
running
The Door/Face Heater
are wired to the
Compressor Contact
(
ERC 112 - Terminal #1
)
(
ERC 112 - Terminal #1)
Condition
Compr
essor
Condenser
Fa
n
E
v
apora
tor
Fa
n
Defr
ost
Hea
ter
F
ace/Door
Hea
ter
Drain Hea
ter
Cabinet Temp > Set point + 2.5
ON
ON
ON
OFF
ON
ON
Cabinet Temperature <= Set point - 2.5
OFF
OFF
OFF
OFF
OFF
ON
Defrost
OFF
OFF
OFF
ON
OFF
ON
