Airedale EcoChill 6kW - 46kW - Manual (Page 13)

13
EcoChill Chiller
Technical Manual 7300221 V1.1.0_02/2013
MODUCONTROL
CONTROL PANEL
compatibility EMC 89/336/EEC and 92/31/EEC.
Door-lock isolating switch
THE electric control board can be accessed by
isolating the main power supply via the door
interlock. This lever can be locked using one or
more padlocks during maintenance interventions
to prevent the machine being powered up
accidentally. (Lock off procedure)
Control board
Allows complete control of the unit.
For a more in-depth description please refer to
the user manual.
− compressors magnet circuit-breaker protection.
− fans magnet-circuit breakers protection;
− auxiliary magnet circuit-breaker protection
− Heat exchanger inlet/Water outlet temperature
probes
− Gas temperature probe one on the for pressing
line and coil
− External air temperature probe WITH DCPX
ACCESSORY
•
2.4. ELECTRONIC MODU CONTROL
ADJUSTMENT
MODU_CONTROL
Temperature control of the outlet water with
proportional-integral algorithm: maintains
average outlet temperature at value set
Self-adapting differential switch:
guarantees minimum functioning times of the
compressor in systems with low water content.
Intelligent defrosting for pressure reduction:
allows to determine when the coil is effectively
defrosted, avoiding excessive defrost operation
Hot gas injection defrosting: In this way the
machine consumes less energy, increases
heating capacity, keeps efficiency high and
prevents temperature drops at the terminals
(very important in plants with low water content
Emergency defrosting by cooling cycle reversing:
to overcome more serious conditions
Set-point compensation with external
temperature (with external air probe accessory):
reduces energy consumption
Condensation check based on the pressure
rather than on temperature for absolute stability
(with DCPX revs. adjuster accessory)
Inverse condensation check for the heat pump
functioning mode also in summer (withDCPX
revs. adjuster accessory).
Pre-alarms with automatic reset: in the case of alarm,
a certain number of re-starts are allowed before
latching out.
Alarm on the∆T: to identify wiring errors (reverse
rotation) or blocked cycle reversing valve.
Compressor functioning hours count
Compressor peak count.
Historical alarms
Autostart after voltage drop.
Local or remote control
Display of unit status:
a. Voltage presence
b. Compressor ON/OFF
c. Functioning mode (hot/cold)
d. Alarm active
Probes, transducers and parameters display
a. Water outlet
b. Water inlet
c. Coil temperature (heat pumps)
d. Pressing line gas temperature
e. External air temperature (heat pumps,
cooling only with DCPX and probe)
f. Flow pressure (heat pumps)
g. Intake pressure (heat pumps)
h. Temperature error (sum of the
proportional and integral error)
i. Stand-by times for start-up/switch-off of
the compressor
Alarms management
a. Low pressure
b. High pressure (primary alarm: the
pressure switch directly blocks power supply to
compressor)
c. High discharge temperature
d. Anti-freeze
e. Water differential flow meter/pressure
switch
f. Alarm on the ∆T
Alarms with automatic reset with limited number of re-
starts before blockin ON/OFF from external contact
Change season from external contact
For further information please refer to user
manual