7
5
Regulation
5.1
Control, safety and regulation elements
The boiler is supplied without a superior regulation and is equipped with a control panel with control, safety and regulation elements.
The manufacturer does not recommend operation of the boiler without regulation. A version without regulation is determined for customers who
have their own system for boiler control.
The electric panel of the boiler is equipped with the following elements:
1
– electric panel;
2
– main switch with signalling;
3 - signalling of temperature exceeding (safety thermostat and flue gases reverse flow safety device);
unblocking of automatics failure;
4
– switch of low / nominal stage of the boiler;
5
– line fuse of 2.5 A;
6
– boiler thermostat;
7
– thermo-manometer;
8
– electric panel bracket;
9
– safety flue-gases thermostat;
10
– safety operational thermostat;
11
– bushing with diameter of 17;
12
– bushing with diameter of 22.
Unblocking of the safety thermostats is placed in the bottom part of the bracket of the electric panel (can be unblocked after removal of
the front part of the cladding).
-
unblocking of the safety thermostat (for opened systems, please leave the factory settings, i.e. 97 °C, for closed systems with a pressure
expansion tank, it may be even set up to 105 °C);
-
unblocking of the flue gas
es reverse flow safety device (it is set at 75 °C);
-
boiler thermostat (the range is 0
– 85 °C, the recommended setting is 85 °C);
-
line fuse of 2.5 A;
The sensor of the flue gases reverse flow safety device, placed in the horizontal draught diverter, will switch-off boiler in case of insufficient flue
gases withdrawal. Sensors of the safety and boiler thermostats (eventually, the pump thermostat) of the thermometer are placed in the well of
the left outer section, and the back-pressure valve that is placed in the upper part of the right outer section.
The boiler is equipped (on customer's request) with one of the offered gas valves:
1.
HONEYWELL VK 4100 Q 2003B or VK 4100 P 2004 TWO-STAGE COMBINED ELECTROMAGNETIC VALVE EQUIPPED WITH A
HIGH-LOW COIL (fig. No. 29)
–
enables automatic operation of the boiler in two-stage operation mode (nominal power - low power);
–
automatic switching-over between both stages of power is provided by the outdoor thermostat Rego typ 95001;
–
boilers equipped with this gas valve can be equipped with a programmable regulator Honeywell CM 707 or with a superior regulation.
2.
HONEYWELL VK 4100 A 1002 ONE-STAGE COMBINED ELECTROMAGNETIC VALVE (fig. No. 31)
–
the boiler can be operated with only a power that can be firmly set according to the table No. 3 (the setting can be only performed by a
service organization trained by the manufacturer);
–
enables connection of regulation - a programmable regulator Honeywell CM 707 or a superior regulation.
S 4565 BF 1088 or S 4565 BF 1112 automatics, with a light failure signalling and an unblocking button is placed on the body of VK 4100Q
2003B or VK 4100A 1002 gas valves.
3.
SIT SIGMA 843 TWO-STAGE ELECTROMAGNETIC VALVE EQUIPPED WITH A HIGH-LOW COIL (fig. No. 30)
–
enables automatic operation of the boiler in two-stage operation mode (nominal power - low power);
–
automatic switching-over between both stages of power is provided by the Rego outdoor thermostat of 95001 type;
–
boilers equipped with this gas valve can be equipped with Honeywell CM 707 programmable regulator or with a superior regulation.
SIT 537 automatics are placed on SIT Sigma 843 gas valve.
