Note: Manual defrosts also end after the defrost duration (dd) or on reaching the defrost termination temperature (dtd).
For more information about the parameters used in defrost:
l See "defrost duration (dd)" on page 71
l See "defrost interval (dE)" on page 71
l See "defrost termination temperature (dtd)" on page 73
5.6 defrost on open front coolers
Defrost cycles are timed or temperature based as defined by the defrost method (dF). The temperature is measured on the
evaporator sensor.
The table below describes the defrost methods.
timed-based
Time-based defrost cycles occur periodically as defined by the defrost interval (dE).
Time-based defrost cycles can also be initiated by pressing the defrost button. Starting a defrost cycle
manually resets the defrost interval (dE) timer, so the next automatic defrost cycle starts dE hours after
the manual defrost.
Timed-based defrost cycles end after the defrost duration (dd), or either on the defrost duration or on
reaching defrost termination temperature (dtd) as defined by the defrost termination method (dtF).
temperature-
based
Temperature-based defrost cycles occur when the temperature measured on the evaporator sensor falls
below the defrost activation temperature (ddt).
Temperature-based defrost cycles end after the defrost duration (dd) or on reaching the defrost ter-
mination temperature (dtd).
Note: Manual defrosts only work if the defrost method is time-based and the temperature measured on the evaporator
sensor is below the defrost termination temperature (dtd).
The diagram below shows the temperature measured on the evaporator sensor with the following defrost cycles:
1.
started after the defrost interval (dE) and terminated after the defrost duration (dd) – time-based.
2.
started on the defrost activation temperature (ddt) and terminated after the defrost duration (dd) – temperature-based.
3.
started after the defrost interval (dE) and terminated on the defrost termination temperature (dtd) – time-based.
ems55advanced and ems55Radvanced / General Use
23 of 84
To Next Page
Loading...
Need help?
General
