4.6.3. Diagram of connections of the limit switch of fire valve
Legend for connections of control and signalling circuits:
→
Signalling fire calve closure: connection “a” signals valve
closure (depending on the control system, lamp is on, sound
signal is on, ventilation is switched off).
Signalling of fire valve opening – connection “b" (lamp or
sound alarm is off, ventilation switched on).
5. PRINCIPLES FOR FIRE VALVES MAINTENANCE
CAUTION: Before performing activities related to electrical connections or
replacement of elements in the valves powered with voltage higher than safe,
disconnect power supply.
5.1.
Replacement of mechanical thermal element or melting fuse.
After unscrewing two M5 screws (item 9 Fig. to section 5.1.) (optionally nut M6), remove the entire
mechanical thermal element from the valve, item 1, together with plate, item 2. In order to replace the
thermal element (item 3), unscrew the nut (item 4), press the spring (item 7) with the element, and
after the element item 1 is bent to the side, remove the glass element (item 3) from the steel clip (item
6), or remove the protection (item 10) and remove the soldered element from the shank (item 11).
After placing the glass element in the socket in the brass element (item 5), so that the elongated part
of the insert is inside the element, or after placement of soldered element on the shank, assemble the
thermal element in reverse order, not forgetting to place a sealing cushion (item 8) under the thermal
element plate. The glass element must be set precisely in the socket and opening of the elements
(item 6). The shank of the thermal element (item 11) must block the protrusion of the wired catch of
the lever from the thermal element.
Control
cabinet
Limit switch
conductor ‘’1’’
c.’2’
c.’3’
24/48V DC
or 230V
AC
Mechanical glass thermal
element for valves type
RK370 and V370
Mechanical soldered
thermal element for
valves type RK370 &V370
Fig. to section 5.1.
