Hoval TopGas 80, Руководство по установке

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26 4 213 894 / 01
COMMISSIONING
between 50 and 200yS/cm. The pH value will adjust itself
thereby from initially 6,5 - 7,5 after some weeks been in
use on 8,0 - 8,5. If this should not be the ca se, then spe-
cialized company for the water treatment is to be assig-
ned. This compa ny must as soon as the adjustment of the
cor rect pH value has been completed by inhibitors, which
are suitable for aluminum materials also regularly check
the inhibitor concentration and the pH value.
5.2.3 Filling up the system
- Old and new plants have to be rinsed and cleaned pro-
fessionally before filling up.
- Filling or refilling of the plant: Demands on the fill-up
and make-up water according to (chapter 5.2.2) have to
be observed. During the lifetime of the heat production
plant the maximum water content (sum of fill-up and
make-up water) shouldn‘t exceed the triple of the maxi-
mum fill-up quantity.
Example: maximum fill-up quantity (as in table 1) 1600 l,
maximum fill-up and make-up water content during life-
time 4800 l.
!
WARNING
Before commissioning, the siphon must be
filled with water to prevent flue gas leakage.
Installation of a strainer in the boiler return is
recommended.
- Minimum system pressure at the boiler:
Type TopGas
®
(80)
Minimum system pressure at the boiler 1,5 bar
The unit needs to be filled up slowly at the fill-up and drain
cock on the boiler, while the radiators are open.
NOTICE
System corrosion and bleeding problems
are often caused by refilling or topping up.
Drain trap at the condensate drain must be
filled with water.
5.3 Gas adjustment
Compliance with the maximum permissible li-
mit values for CO and NOx must be verified
through measurement at the installation location.
5.3.1 Bleeding the gas pipeline
Open the gas shut-off value and bleed the air from the
pipeline up to the gas fitting; comply with the relevant re-
gulations.
5.3.2 Commissioning
Place the boiler in operation according to the detailed
operating instructions.
5.3.3 Gas inlet pressure
The minimum flow pressure in the appliance connection
pipeline must attain the following values:
Natural gas = min. 18 mbar max. 50 mbar
Propane = min. 37 mbar max. 50 mbar
If the connection pressure for natural gas is below 15 or
above 50 mbar, no setting and no commissioning is to
take place.
5.3.4 Gas fitting
The Hoval TopGas
®
is equipped with a Honeywell pneu-
matic modulating multiple setting device. scope of supply
includes two solenoid valves (B+B), a screen filter plus an
installed pressure balance (1:1) - gas/air servo controller.
The fan which is activated by the boiler electrical sys-
tem produces a speed dependent air flow. This creates a
pressure drop in a venturi tube. The air pressure is trans-
ferred to the servo controller of the multiple setting device
where it brings about a pressure-proportional change in
the gas flow rate. The gas flow follows the air flow in the
given ratio (constant air factor in the modulation range).
C D B A
fig. 11
Measuring and setting points of the Honeywell multiple
setting device VK 4125