Viessmann CT3U, Инструкция по эксплуатации

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2. Check the position of the rotary damper in burner
idle mode. Rotary damper windows
B
must be
fully opened. Scale ring
D
on the air damper ser-
vomotor must be set to "0", relative to marking
C
.
3.
Check whether compensation hose A has been
connected between the gas train and distributor
pipe.
4. Start the burner.
5. Check the position of the rotary damper during the
start-up phase. Rotary damper windows
B
must
nearly close for approx. 5 s. During this period,
scale ring
D
is on the following settings:
Rated heating output
in kW Rotary damper setting
400 30°
500 35°
630 30°
Performing final checks
1. Carry out final checks in accordance with the
points on pages 12 to 14. 2. Record actual values in the report (on page 54).
Checking the water quality
Enter the amount of top-up water, the water hardness
and the pH value in the tables on page 54 onwards.
For water quality requirements, see page 52.
The pH value should be between 8.2 and 9.5.
Checking the function of the safety valves
Checking the temperature controller setting if a building management system
is used (DCC system)
!
Please note
Shutting down from full load can result in high
material stress and material damage.
If a system with a higher ranking building man-
agement system takes over the temperature
control of the boiler, adjust the settings at the
temperature controller TR. Set the electronic
temperature controller to at least 10 K below the
mechanical temperature controller.
Checking the expansion vessel and system pressure
Note
Observe the information provided by the manufacturer
of the expansion vessel (DEV).
Carry out this test on a cold system.
1. Drain the system until the pressure gauge indi-
cates "0" or close the cap valve on the expansion
vessel and reduce the pressure in the expansion
vessel.
2. If the pre-charge pressure of the expansion vessel
is lower than the static system pressure, top up
with nitrogen until the pre-charge pressure is 0.1 to
0.2 bar (10 to 20 kPa) higher.
3. Top up with water until the charge pressure of the
cooled system is 0.1 to 0.2 bar (10 to 20 kPa)
higher than the pre-charge pressure of the expan-
sion vessel.
Permiss. operating pressure: 5.5 bar (550 kPa)
Commissioning, inspection, maintenance
Checking the rotary damper setting
(cont.)
5783 337 GB