BaltGaz NEVALUX-5611 User Manual page 22

c) Fill in the heat exchanger's pipeline with the prepared solution and leave it there for 10-15 minutes, then drain the
solution and wash the pipeline thoroughly with water;
d) Repeat all the process if necessary.
12.3.3. Sealings replacement
During technical service when disassembling or assembly of water or gas pipelines is effectuated, it is necessary to obligatory
install new sealings.
12.3.4. Checking of gas and water systems on air-tightness
After regular technical service when disassembling and assembly of water and gas pipes were performed it is necessary to check
the appliance on air-tightness (see pp. 7.3.7 and 7.4.5).
12.3.5. Checking the thermo relay's (draught sensor's) working capacity
In order to check the thermo relay it is necessary to disconnect the flue pipe from the appliance, switch the appliance on and at
rated working mode (with completely opened gas valve and rated water consumption) close the appliance's gas pipe with a metal
sheet. The appliance should switch off within 2 minutes. If the thermo relay is out of order it must be replaced by removing it from the
gas removal device (scheme 12, 14). Only a thermo relay provided by the company-manufacturer can be used for replacement. After
replacing the thermo relay it is necessary to repeat the test.
After testing, connect the flue pipe to the appliance, ensuring the joint's air-tightness.
12.3.6. Unscheduled cleaning of the appliance
Cleaning of the appliance might be required more than once a year because of the intensive appliance's operation in the premises
with much dust in the air. You can notice it visually by the burner's changed flame color. If the flame becomes yellow or smoky, it
means that burner is contaminated with dust particles from the air and it is necessary to perform cleaning and technical sevice of the
appliance. During burner's normal operation flame must have blue color.
It is necessary to perform an unscheduled cleaning of the appliance in case if in the premise where appliance is installed, some
constructional or repairing works were made and lots of dust and construction waste got into the appliance.
ATTENTION! In case of dust accumulation in the inner units and details of the appliance there is a risk of its
inflammation.