Carel MuC2SE, Руководство пользователя

Страница: 25 / 40

25
µC
2
SE process c030220416
- rel. 2.3 - 17.05.2018
Compressors deactivation external temperature (par.r25)
The compressors are deactivated if the external temperature drops below the value of r25. The differential for re-activation is fixed at 1 degree. The
resistances can be activated according to the relative set-points
ON
OFF
r25
B3
1
CMP
Key:
CMP = Compressore
B3 = Probe esterna
6.5 Pumps management
Pump operation
H05 establishes the evaporator pump operating mode.
H05 = 0: pump disabled, (the flow switch alarm is ignored)
H05 = 1: always on (alarm managed)
H05 = 2: switched-on on regulator request (alarm managed)
H05 = 3: pump activated at regular ON and OFF intervals (with compressor in OFF) according to parameters c17 and c18.
Minimum switch-on/off times
c17: below find the operating diagram of the pump in burst mode (active with H05 = 3). The burst operation is disabled in stand-by and during an
alarm with pump inhibited. On switch-on it is activated after time c17. c18 represents the minimum time during which the pump remains active. See
the following paragraph for compressor-pump delays c07 and c08.
Par. Description Def Min Max U.M.
c17 Pump minimum
switch-off time 30 0 150 min
c18 Pump minimum
switch-on time 3 0 15 min
t
c18
c07 c08
c17 c18
c17 c18
ON
OFF
ON
OFF
CMP
P
Key:
CMP = Compressor
P = Pump
t = time
6.6 Compressor – evaporator pump/valve delays
Compressor-pump delays (par. c07, c08)
c07: if the evaporator pump is on at request of the regulator (H05 = 2), if necessary, the compressor is enabled after the time set. If the pump is
always on (H05 = 1) it is activated after the times set by unit switch-on (c06).
c08: with the pump on by regulator call (H05=2), in the event of compressor switch-off, regulation first pilots compressor deactivation and then that of
the pump. If the flow pump is always on (H05=1), it is only deactivated in standby.
Par. Description Def Min Max U.M.
c07 Pump-compressor switch-on delay 20 0 999 s
c08 Compressor-pump switch-off delay 1 0 150 min
ON
OFF
ON
OFF
t
P
CMP
c08 c07
Key:
CMP = Compressor
P = Pump
t = time
Valve-compressor switch-on delay
c19 represents the delay time necessary to ensure that the valve opens before compressor start-up. The parameter is only available when the EVD
4
driver is connected.
Par. Description Def Min Max U.M.
c19 Valve-compressor switch-on delay 3 0 100 s
Par. Description Def Min Max U.M.
r25 Compressors deactivation external temperature
-40 = function deactivated -40 -40 80 °C/°F