Carel UU02 - Washing; Timings

28
ENG
“humiSonic ventilation” +0300063EN - rel. 1.0 - 16.02.2016
7.6 Washing
The washing cycle involves a complete drain cycle, a phase in which fi ll
and drain are activated together to fl ush out any residues in the tank, a
complete fi ll cycle and fi nally another complete drain cycle. During this
operation, atomised water production is stopped.
The washing cycle can be time triggered or event triggered. Once
activated, the washing cycle lasts the time set on screen Fb09.
Screen index Display description Def Min Max UOM
Fb09 Wash settings
Washing time 1 0 10 min
Only if ready ? NO NO YES -
Tab. 7.e
The washing cycle can only be performed if humiSonic is operating (only
if ready ? = YES), or if it is operating or in standby (only if ready ? = NO). It
is assumed that the humidifi er is not operating because it is disabled (see
ON activation conditions). The washing cycle can also be activated on the
screen or via BMS, if enabled.
Screen index Display description Def Min Max UOM
Fb02 Washings
From mask Yes Yes No -
From BMS Yes Yes No -
Tab. 7.f
TIME TRIGGERED EVENT TRIGGERED
OR
WASHING
Fig. 7.g
Screen index Display description Selection
Fb01 Washings
Time triggered Disabled ¦ Absolute time ¦ Working/ No
working ¦ Scheduled
Event triggered Disabled ¦ From digital input ¦ From
request
Tab. 7.g
7.6.3 Time triggered
Absolute time: the washing cycle is run periodically, and the period is
defi ned on screen Fb05.
Screen index Display description Def Min Max UOM
Fb05 Absolute
Period 24 0 999 h/m
Next wash 24 0 999 h/m
Tab. 7.h
The duration of the period can be expressed in either hours or minutes
(press UP/DOWN to changeover from one to the other), based on the
screen display (it is NOT the sum of the two times).
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/EXT8ASHH
"BSOLUTE'B
1ERIODM
/EXT8ASHM
"BSOLUTE'B
Fig. 7.h
Work / stand by: the type of washing cycle is enabled on screens Fb03/
Fb04; the cycle starts after the corresponding operating period.
Screen index Display description Def Min Max UOM
Fb03 Work wash
Enabled Yes No Yes -
Work wash period 1 0 480 h/min
Fb04 Nowork wash
Enabled Yes No Yes -
Nowork period 24 1 480 h/min
Next wash 24 1 480 h/min
Tab. 7.i
Scheduled: the starting time and day are set on screen Fb06.
Screen index Display description Def Min Max UOM
Fb06 Scheduled
Start 00:00 00:00 23:59 -
Select day ? No No Yes -
Every Monday Monday Sunday
Tab. 7.j
7.6.4 Event triggered
Digital input: select whether the digital input or the humidistat enables
the action, and whether the event is from open to closed (Off On) or
vice-versa (On Off ).
Screen index Display
description
Def Min Max UOM
Fb07 From DI
Input Humidistat Humidistat Rem. On/Off -
When
On
Off On Off Off On
-
Tab. 7.k
From request: the request can derive from a probe or a humidistat (rise/
fall = request activated/deactivated).
Screen index Display description Def Min Max UOM
Fb08 From request
When request Rise Rise Fall -
Tab. 7.l
7.7 Timings
The activation times are applied during unit operation and are used by
the controller to detect any malfunctions.
7.7.1 Fill/drain times
Tmax fi ll: maximum fi ll solenoid valve opening time.
The humidifi er detects when there is no feedwater (or the quantity is too
low), by checking the level sensor status after opening the fi ll solenoid
valve. If the tank is empty, and sensor activation is not detected within the
time set by parameter “Tmax fi ll” (default 2 minutes), the humidifi er is not
activated, rather the drain valve opens, after which there is a waiting time
equal to the number of minutes set by parameter “Restart wait” (Fc01,
default 10), during the which is the message is shown on the display:
Waiting (Restart: xx minutes)
xx displays the minutes remaining until restart (starting from the value
set for Fc01), after which there is another refi ll attempt. If this is successful,
production restarts, otherwise there is a further “Restart wait (Fc01)” for
the set number of minutes. The process is repeated until the sensor
detects water is present. For the fi rst two attempts, no alarm is generated,
however if after the third attempt the procedure is not successful, alarm
EF is generated, which is reset automatically when the humidifi er detects
water is present again. If the water fi ll cycle occurs during atomised water
production, see the paragraph “Tmax refi ll”.
Tmax drain: maximum drain solenoid valve opening time.
The humidifi er detects when the water fails to drain (or the level is
too high), by checking the level sensor status after opening the drain
solenoid valve. If sensor activation is not detected within the time set
by parameter “Tmax drain” (default 60 s), the humidifi er keeps the drain
solenoid valve open and activates the wait procedure, as described in
the previous paragraph, displaying alarm Ed. The humidifi er will reset the
alarm and resume normal operation when the low water level is correctly
measured.