VIGAS 25 Lambda Control - Boiler Accessories and Assembly

26
Gasifying boiler Vigas
Discharge
Hole for sensor.
Drain valve
–
cool water
inlet
16. ACCESSORIES AND ASSEMBLY.
16.1 SAFETY DRAIN VALVE
Cooling safety exchanger use:
Primary airway cleaning
Check primary airway pipes and only clean if necessary. Congestion can occur
when using wet wood or
boiler runs for a long time in low performance.
Type of
primary airway design is different for each boiler model.
Step 4: Dismantle primary air separation panel.
Step 5: Use vacuum and scraper to clean primary leads and check if clean.
Step 6: It is possible to dismantle the vertical primary air lead but only if it is
absolutely necessary. With boilers VIGAS 16, VIGAS 25 a VIGAS 40
side primary air tube, also ( step 6/a, step 6/b).
Note: It is necesary to use silicone heatproof seal, when this action is
repeated.
Step
6./b
Vertical
primary air lead
A cooling safety exchanger with drain valve TS 131
provides boiler protection against overheating during a
power cut. By forced circulation the pump and water flow in
the central heating will shut down. If there is not an option
to have an auto
matic gravity convection or minimum heat
consumption of 5 kW, the boiler may overheat. The drain
valve TS 131 and cooling exchanger will stop the boiler
from overheating.
Assembly of drain valve TS 131:
Screw the drain valve TS 131 into the boiler sock
et „1“ so it
is water tight. The safety exchanger must be water tight.
The second connection „3“ pic., must be connected
to drain
via a tundish. Insert the thermal sensor into ½“ socket, pic.
„2“.
Warning
:
 The assembly of the valve and thermal sensor
is
necessary before the
central heating system is filled with
water.

The pressure of cooling water can not be lower than the
pressure of the mains water.
 It is advised not to loosen the ¾“ socke
t „2“ pic. This can
cause water leakage. There is an aluminium ring „4“
under the insert „3“ to seal the copper pipe „5“. If there is
a water leak, tighten ¾“ insert „2“.
Operation rule:
The drain valve is regulated by hot water. If the water temperature is 95°C the valve opens.
Water running
from main source
will absorb the temperature from the boiler and prevent it from possible damage and
overheating. This boiler protection system complies with standards STN EN 303-5:2012.
Side
primary air lead
Step 6./a