Technical data

14 • XM670K-XM679K I&O Manual 026-1218 Rev 0 19-DEC-2012
tod
Time out for heater: 0 to 255 (min.) if the defrost probe temperature is bigger than Srt for all tod time the
defrost ends although the defrost probe temperature is lower than dtE or dtS. It permits to reduce defrost
duration;
dtP
Minimum temperature difference to start defrost: [0.1°C to 50.0°C] [1°F to 90°F] if the difference between
the two defrost probes stays lower than dtP for all ddP time the defrost is activated.
ddP Delay before starting defrost (related to dtP): (0 to 60 min) delay related to dtP.
d2P
Defrost with two probes: (n - Y) n= only the dPA probe is used to defrost management; Y= defrost is managed
with dPA probe and dPb probe. Defrost can performed only if both probe value are lower than dtE for dPA
probe and dtS for dPb probe;
dtE
Defrost termination temperature (Probe A): (-55.0 to 50.0°C; -67 to 122°F) (Enabled only when the
evaporator probe is present) sets the temperature measured by the evaporator probe dPA which causes the
end of defrost.
dtS
Defrost termination temperature (Probe B): (-55.0 to 50.0°C; -67 to 122°F) (Enabled only when the
evaporator probe is present) sets the temperature measured by the evaporator probe dPb which causes the end
of defrost.
IdF
Interval between defrosts: (0 to 120h) Determines the time interval between the beginning of two defrost
cycles.
MdF
Maximum duration of defrost: (0 to 255 min) When dPA and dPb aren't present, it sets the defrost duration,
otherwise it sets the maximum duration for defrost;
dSd
Start defrost delay: (0 to 255 min) This is useful when different defrost start times are necessary to avoid
overloading the plant.
dFd
Display during defrost: rt = real temperature; it = temperature reading at the defrost start; Set = setpoint; dEF
= “dEF” label.
dAd
Defrost display time out: (0 to 255 min) Sets the maximum time between the end of defrost and the restarting
of the real room temperature display.
Fdt
Drain down time: (0 to 255 min.) time interval between reaching defrost termination temperature and the
restoring of the control's normal operation. This time allows the evaporator to eliminate water drops that
might have formed due to defrost.
dPo First defrost after start-up: y = Immediately; n = after the IdF time
dAF
Defrost delay after continuous cycle: (0 to 23.5h) time interval between the end of the fast freezing cycle and
the following defrost related to it.
FAN
FPA
Fan probe A: (nP; P1; P2, P3, P4, P5) first probe used for fan. If FPA = nP the regulation is performed with
real value of FPB;
FPB
Fan probe B: (nP; P1; P2, P3, P4, P5) second probe used for defrost. If FPB = nP the regulation is performed
with real value of FPB;
FPE
Fan virtual probe percentage: (0 to 100%) Defines the percentage of the FPA with respect to FPb. The value
used to regulate room temperature is obtained by:
value_for_defrost= (FPA*FPE + FPb*(100-FPE))/100
FnC
Fan operating mode: C-n = running with the solenoid valve, OFF during the defrost; C-y = running with the
solenoid valve, ON during the defrost; O-n = continuous mode, OFF during the defrost; O-y = continuous
mode, ON during the defrost.
Table 9-1 - XM670K to XM679K Parameters List