12
The boiler designated for natural gas combustion
Is equipped (optionally) with one of three offered gas valves:
1. DOUBLE STAGE COMBINED ELECTROMAGNETIC VALVE HONEYWELL
VK 4100 Q 2003B OR VK 4100 P 2004 EQUIPPED WITH A HIGH-LOW COIL (fig.no. 25a)
–
Enables an automatic boiler operation in double stage working regime (rated output – reduced output)
–
Automatic switching over between both output stages is ensured by Rego type 95001 outdoor
thermostat
–
The boilers equipped with this gas valve can be equipped with programmable Honeywell CM 707
regulator or with regulation A1 – A3 – at G 42 ECO boiler
2. DOUBLE STAGE COMBINED ELECTROMAGNETIC VALVE SIT
SIGMA 843 EQUIPPED WITH HIGH-LOW COIL (fig.no. 25b)
–
Enables an automatic boiler operation in double stage working regime (rated output – reduced output)
–
Automatic switching between both heat output stages is ensured by Rego type 95001 outdoor
thermostat
–
The boilers equipped with this gas valve can be equipped with programmable Honeywell CM 707
regulator or with regulation A1 – A3 – at G 42 ECO boiler
3. SINGLE STAGE COMBINED ELECTROMAGNETIC VALVE HONEYWELL
VK 4100 A 1002 (fig.no. 26)
–
The boiler can only be operated at the output which can be firmly set according to tab. no.3a, 4a, 5
(adjustment can only be done by a contractual service organization trained by manufacturer)
–
It enables the connection of all both offered types of regulation (Honeywell CM 707 programmable
regulator or A1 – A4 regulation)
On the gas valve bodies of VK 4100Q 2003B and VK 4100A 1002 types there is installed the burner
automatics type S 4565 BF 1088 or S 4565 BF 1112 with failure light signalling and unblocking push button.
On the SIT Sigma 843 gas valve there is installed the SIT 537 automatics.
The boiler designated for propane combustion is equipped with:
1. SINGLE STAGE COMBINED ELECTROMAGNETIC VALVE HONEYWELL
VK 4100 A 1002 (fig.no. 26)
−
The boiler can only be operated at the output which stated in tab. no. 3b, 4b (the particular output is set
ma manufacturer)
–
It enables the connection of all both offered types of regulation (Honeywell CM 707 programmable
regulator or A1 – A4 regulation)
On the Honeywell gas valve body there is installed the S 4565 BF 1112 1 burner automatics.
We offer the burner ignition designs as follows:
a) Polidoro ignition pilot burner
-
The burner ignition and watching operations are provided by low-emission ignition pilot burner. If the
main burner ignition is required there automatically after T
w
= 1 s waiting time the inbuilt lighter is
switched on and the ignition pilot burner gas valve opens. The ignition sparkle lights the ignition pilot
burner and its flame will be then sensed by the flame sensor. After the ignition pilot burner flame has
settled the ignition is switched off and the main valve for main burner gas supply will open. If the
ignition pilot burner does not ignite during T
s
= 55 s (T
s
= 25 s), (SIT T
s
= 60 s) safety time then the
blocking automatics will switch on. If the flame goes out during the normal operation the ignition
automatics will repeat the ignition cycle.
b) Furigas ignition pilot burner
-
its function and the function of above described Polidoro ignition pilot burner are identical.
The ignition pilot burner is switched off together with the main burner.
Other controlling, safety and signalling elements are installed in boiler control panel which is
equipped with network module with elements as follows:
-
the main switch
-
exceeded temperature signalling (link to the safety thermostat and combustion products return flow fuse)
-
automatics reset
-
output switch (only at the boilers equipped with double stage electromagnetic valve)
-
fuse 2,5 A
-
safety thermostat reset (set to 97 °C)
Summary of Contents for GARDE G 42 ECO
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