Shutting Down The Ventilation Unit; Adjusting The Ventilation Programming Unit To The Ventilation System; Cleaning And Replacing Filters; Resetting The Filter Service Indicator - Viessmann LB1 Installation And Service Instructions For Contractors

Balancing the supply air/extract air flow rates
Danger
If "Imbalance permitted C1A2" is set to "1",
only the supply air flow rate can be reduced to
enable frost protection for the heat exchanger,
e.g. if the output of the preheating coil is insuffi-
cient. This may create negative pressure in the
rooms. When operating open flue combustion
equipment, dangerous flue gases could then
flow back into the room.
When operating open flue combustion equip-
ment without on-site safety equipment, do not
set "Imbalance permitted C1A2" to "1".
Vitovent 300-W
With the Vitovent 300-W, the supply air and extract air
flow rates are automatically balanced by the ventilation
unit. Manual balancing is not required.

Shutting down the ventilation unit

Danger
Contact with live components can lead to seri-
ous injury from electric current.
Isolate the power supply prior to starting work on
the appliance.

Adjusting the ventilation programming unit to the ventilation system

The parameters of the ventilation programming unit,
type LB1 must be adjusted to match the ventilation
system equipment.

Cleaning and replacing filters

Operating instructions "Ventilation programming
unit, type LB1"

Resetting the filter service indicator

1. Insert power supply plug into a standard socket.
!
Please note
Dust deposits in the appliance can result in
malfunctions.
Never switch on the appliance without sup-
ply air and extract air filters.
2. Extended menu:
Commissioning, inspection, maintenance
(cont.)
Ventilation unit installation and service instruc-
tions
Parameters for adjusting the ventilation system: See
page 19.
3. "Ventilation"
4. "Filter change"
5. "Yes"
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