Viessmann SCU345 Manual page 56

OTH / t2 (3) O
Switch-on time 2 (3)
Adjustment range: 00:00 ... 23:45
Factory setting: 00:00
OTH / t2 (3) F
Switch-off time 2 (3)
Adjustment range: 00:00 ... 23:45
Factory setting: 00:00
OTH / STH
Thermostatic backup heating sensor
Selection: S3, S5
Factory setting: S3 / S5
Depending on the system selected, the sensor for the
thermostatic backup heating can either be selected
or is pre-set.
56
OTH / RTH
Thermostatic backup heating relay
Selection:
Factory setting: R3
Depending on the system selected, the relay for the
thermostatic backup heating can either be selected
or is pre-set.
Manual mode
MAN / MAN1 (2, 3):
Adjustment range:
Auto,ON, OFF, nLO, nHI
Factory setting: Auto
MAN / MAN4
Adjustment range:
Auto, ON, OFF
Factory setting: Auto
For control and service work, the operating mode of
the controller can be manually adjusted. For this pur-
pose, select the adjustment value MAN.The following
adjustments can be carried out:
Auto : relay in automatic mode
ON : relay is switched on
OFF : relay is switched off
nLO : relay is switched with adjusted minimum
speed
nHI : relay is switched with adjusted maximum
speed
The controller is equipped with a shortcut that ena-
bles a quick access to the MAN menu (manual mode).
Î In order to access the MAN menu, press buttons
and at the same time, then press button
6 7
.
2
Note
Always adjust the operating mode back to
"Auto" when the control and service work
is completed. Otherwise normal operation
will not be possible.
Blocking protection
BLPR1(2, 3)
Adjustment range: ON / OFF
Factory setting: ON
In order to protect the pumps against blocking after
standstill, the controller is equipped with a blocking
protection function. This function switches on the re-
lays one after another every day at 12:00 a.m. for 10 s
at 100%.