Alemite 343684 Manuale di istruzioni per l'installazione e la manutenzione - Pagina 9

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Operation
Valve assembly († Fig. 7) consists of two
separate internal valves; the primary needle
valve and the secondary valve. The primary
valve actuates first, causing the secondary
valve to operate.
When the coil is energized, the primary
needle valve lifts and allows fluid into
delivery port. Fluid pressure equalizes and
assists movement of secondary valve.
When energized, the valves poppet lifts to
open the port 2 to port 1 flow path, while
flow from port 1 to port 2 is severely
restricted.*
Manual override
To place valve in manual override mode,
push down on knob and turn counter-
clockwise 180°.
NOTE
Fluid inlet is numbered 2 and fluid outlet
is numbered 1 († Fig. 7).
*
Indicates change.
Solenoid (343683 and 343684)
Item
Description
A
Wire to keypad controller
B
Manual override (normally closed)*
C
Fluid inlet
D
Fluid outlet
*
Indicates change.
9
A
B
C
Fig. 7
D