22
The boiler-station wiring and electrical equipment must be connected to the mains and repaired
only by electrical personnel with appropriate qualifications.
8.3. Technical Measures
On the top of a boiler (boilers), there must be fitted:
-
control and measuring devices to control boiler (boilers) parameters during operation,
automatic devices to control combustion process, emergency mode alarms. The list of
devices is provided in Table 1.8.
Table 8.1
No.
Purpose
Technical Data
Name of device
No. in
schemes
6.4.2
1.
Outgoing water
temperature control
(0 - 120)
o
C
Thermometer
pos. 9
2.
Pressure in outgoing water
junction pipe, emergency
mode alarm upon
unacceptable increase or
decrease in pressure
0 - 6 bar, Ø160, 2.5 accuracy class
Contact pressure
gauge
pos. 7
3.
Return water temperature
control
(0 - 120)
o
C
Thermometer
pos. 10
4.
Pressure in return water
junction pipe
0 - 6 bar, Ø100, 2.5 accuracy class
Pressure gauge
pos. 8
5.
Combustion process
control basing on outgoing
water temperature,
emergency mode alarms,
the air supply block
Fan control 0 - 95
o
C
alarm:
- high temperature > 95
o
C
- high pressure > 4 bar
- low pressure < regular operating
Boiler control
console,
temperature
sensor
-
-
closing or adjusting valves, pressure safety devices, only provided in the boiler design or
supplied with the boiler, with the parameter values no lower or no higher than operating
ones, specified the boiler certificate.
During operation, a short-term increase in pressure above the specified one in the boiler
certificate by maximum 10% is allowed.
A casing of the boiler used must be connected to a boiler grounding device by means of the
protective earthing conductor "PE".
A smoke capture hood and an exhaust ventilation system are recommended to install above
the front of the boiler, beside the funnel cleaning door.
When carrying out boiler cleaning or repair, it is required to use only tools, supplied by the
manufacturer or other standard tools. When cleaning boilers, please, use goggles and respirators.
Any repair works inside the boiler are allowed only after cooling down of it to below 50°C.
The lighting in controls and instrumentation sites must be at least 300 lx. During repairs, only a
12V movable lamp is allowed to use as auxiliary lighting.
8.4 The boiler operation is prohibited when:
-
leaking and clogged heating system;
-
leaking flue pipes or boiler door, cleaning vents caps;
-
control and instrumentation devices in bad order, safety automation is out of order;