Cover Drive For Hydraulic Unit - Viessmann VITOFLEX 300-UF Technical Manual

Fuel storage
(cont.)
Standard delivery:
■ Hydraulic unit, comprising:
– Gear pump 4 l/min, incl. motor 1.5 kW, 3 x 400 V
– Oil container 12 l, non-return valve
– Pressure limiter valve
– Pressure diverter valve
– Return filter
– Oil level indicator
– Pressure gauge
– Shut-off valve
– Oil filling
– Hydraulic hoses
– Wall mounting brackets
■ Control:
– Via the boiler control unit, protected by temperature and level
switches in the oil container
■ Key switch OPEN/OFF/CLOSED for installation of a locking cylin-
der on site
We recommend installing the key switch near the cover. This lets
you observe the movement of the cover.

Cover drive for hydraulic unit

For part no., see pricelist
Use the cover drive if there is an existing hydraulic unit for the push-
rod discharge.
The cover drive is used for a hydraulic bunker cover (FDH, FDB).
The cover is opened by the hydraulic cylinder when the key switch is
actuated. The load holding valve fixes the cover in position.
Standard delivery:
■ One valve block per cover, each equipped with:
– 2 solenoid valves
– 1 load holding valve
– 2 non-return throttle valves
VITOFLEX 300-UF
Note
The hydraulic unit is required in fuel extraction systems without
hydraulic actuation:
■ Flexible agitator discharge AF
■ Horizontal discharge AH
■ Funnel discharge AP
■ External discharge system
Control:
Via the boiler control unit
One key switch OPEN/OFF/CLOSED per cover for installation of a
locking cylinder on site
We recommend installing the key switch near the cover. This lets
you observe the movement of the cover.
7
Viesmann
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