Viessmann 7441 770, Инструкции по установке и обслуживанию для подрядчиков

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7. Record inspection on page 13.
Maintenance
0 1. Disconnect the power plug.
0 2. Open the condensate lifting system
cover.
0 3. Flush the feed pump with clean
water to remove any loose sludge.
0 4. Carry out a visual inspection of the
feed pump and check for damage.
0 5. Carry out a function check of the
feed pump and check the pump
rate by means of volumetric meas-
uring.
0 6. In the event of a pump fault or
obstruction of the pump flow, pos-
sibly caused by contamination
inside the pump:
Open pump cover and clean pump.
Then carefully clean the sealing
faces, refit the pump cover cor-
rectly (pressure chamber above
the pressure joint) and secure with
screws.
Note
First screw in the two fixing screws
next to the pressure joint and
tighten, then the ones opposite.
Then screw in and tighten all other
fixing screws.
!
Please note
Leaks in the pump cover
lead to reduced output and
may result in damage to the
pump motor.
The cover must be airtight.
The formation of droplets is
permissible.
0 7. Clean the non-return valve and fil-
ter basket, replace if required.
0 8. Clean the supply hose, replace if
required.
Inspection
(cont.)
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