Parker Sporlan S3C, Installation And Operation Instructions Manual

Page: 110 / 146

Page 110 – Bulletin 100-50-9.1
12. DEFROST CONFIGURATION
The Set-up menu ensures that the minimum required
for safe and effective execution of case defrost is entered.
Additional features and modification of the Defrost Cycle
(See Defrost) is performed using the Defrost Menu. There
are two sections for configuring defrost: Operation and
Schedule. The Operation section is used to adjust key
parameters that affect functionality such as type of defrost,
defrost grouping and valve positions during defrost. The
Schedule section simply defines when defrost occurs.
12.1 DEFROST OPERATION
1. From the
default
display, press the  button. The
display will show    .
2. Use the
▲▼
buttons to enter the
administrator
password and press
SET.
3. The display will show  ; press
SET.
4. Press the
▲
button to scroll to the
def
(defrost
configuration menu); press
SET.
5. Using the table below, scroll to the required parameter,
then press
SET
to change.
TABLE 15 - DEFROST CONFIGURATION MENU ITEMS
Display Meaning Description Selections Hide Condition
def Defrost type Type of defrost for case/line-up
Electric
e
Hot gas
g
Off time

d
Defrost termination
temperature set point
Temperature at which active defrost mechanism
(heater, hot gas) deactivates
4 - 75
°F
de Defrost termination fail-safe time Maximum elapsed time before active defrost mechanism deactivates 11-2
minutes
dd Defrost coil drain time
Time period between deactivation of defrost mechanism and re-
initiating refrigeration
 -6 minutes (2)
de
Min defrost time Minimum time for a defrost
1-2 minutes
fd Fan delay temperature Temperature at which evaporator fans energize after defrost -32 -32 (2)
de Fan delay time Maximum elapsed time before fans resume operation  -6 minutes (2)
d
Liquid line solenoid defrost
operation
Liquid line solenoid energized/de-energized during defrost
o
e
(3)
d
Defrost pump down time
Time period after refrigerant flow has ceased prior to
activating the defrost mechanism
 -3
seconds
d Defrost synchronization group Selects defrost group within line-up this case is a member of 1 -8 (4)
h Use internal defrost schedule Selects internal defrost schedule to used when no BAS detected on
network
o
e
dfd Defrosts per day Number of defrosts per day  -12
df Daily start time Starts time of first defrost  - 2359
f Fans on during defrost Selects evaporator fan action during defrost

ff
(2)
d Defrost termination sensor Selects defrost termination temperature sensor
Defrost termination
def
Discharge air
d
Time terminated
e
(5)
def
Defrost active relay
contract
Defrost relay energized/de-energized during active defrost. See
active defrost.
Normally open
oo
Normally closed
o
(2)
d
EEPR percent open during hot
gas drain
% EEPR is open during drain time to allow for equalization of
evaporator pressure to suction
 - 1 %
(1)
du Defrost current Expected defrost current 1.5 to 50 Amps
TABLE 16 - HIDE CONDITIONS FOR DEFROST
CONFIGURATION MENU ITEMS
Number Hide Condition
1 Defrost type is air or electric
2 Defrost type is air
3 Defrost type is hot gas
4 Case type is self-contained
The set-up is simplified by presenting the user with only
the parameter selections required based on previous
parameter value selections. Parameters that can be hidden
in the table above are shaded and assigned a
number in parenthesis. The explanations
 correspond to
those numbers.