19
2.5.6
Filling the heating system with water
The water hardness must correspond to
Č
SN 07 7401 and it is inevitable to treat the water according to
Chap. no. 2.2. in case the water hardness is unsatisfactory.
The heating systems with an open expansion tank allow the direct contact between the heating water and the
atmosphere. During the heating season the water expanding in the tank absorbs the oxygen, which increases its
corrosive effects and at the same time the water evaporates heavily. Only the water treated to the values according
to
Č
SN 07 7401 can be used for refilling.
The heating system must be thoroughly flushed out in order to wash out all impurities.
During the heating season it is necessary to keep a constant volume of heating water in heating system and be
particular about bleeding the heating system to avoid the air suction into the system. Water from the boilers and
heating system must never be discharged or taken for usage except in cases of emergency like the repairs etc.
Water discharge and filling with new water increases the danger of corrosion and scale development. In case we
have to refill the heating system with water we only do this operation when the boiler is cold in order to
prevent its sections from getting broken.
After boiler and heating system refilling operation the all joints must be tested for tightness.
When using the two way safety vent DBV 1 - 02 the cooling water is added gradually to the to the reverse
water.
The assembly and stoking test completion must be recorded in the “Guarantee certificate”.
2.6
Boiler commissioning
This boiler can only be commissioned by a professional assembly firm authorized to do this activity.
2.6.1
Verification activities before commissioning
Before the boiler put into operation it is necessary to check:
a)
filling the heating system with water (thermomanometer check) and the system tightness;
b) connection to the chimney – this connection can only be done with the agreement of a chimney firm
(chimney revision);
c)
closing of smoke adapter partition (impurities associated with the installation of the boiler chimney system);
d)
draught regulator and two-way safety valve DBV 1 - 02.
2.6.2
Boiler commissioning
1. Fire a boiler
2. Bring the boiler to the necessary operating temperature. The recommended output water temperature is 80 C.
3. Adjust the draught regulator including the chain length (according to the enclosed draught regulator manual).
4. Operate the boiler in the operating condition according to the relevant standards.
5. Check again the boiler tightness.
6. Acquaint the user with the operation and maintenance.
7. Make a record in the Guarantee certificate.
2.7
Control and safety elements
Stocking door rosette serves for primary air supply into the combustion chamber. The rosette setting has been
described further in Table no. 6.
Tab.
№
. 6 Setting of Stocking Door Rosette for Primary Air Supply (mm)
4
5
6
7
Black coal
3 - 4
3 - 4
4 - 6
6 - 8
Brown coal
3 - 4
3 - 4
4 - 6
6 - 8
