Specifications

SARIgas Zoom Z – ZF Page 21
Rev.2
INTERNAL WIRING DIAGRAM FOR NATURAL DRAUGHT AUTOMATIC IGNITION BOILERS,
SERIES Zoom Z 420A – Z 520A
Signals on the "P.C.B." card
A.
Gas valve opening consent
B.
Heating pump activation
E.
Led permanently “ON”: exchanger
temperature > 90°C
•
Led flashing (ON/OFF). Warning threshold
for antifreeze pump activation
•
Led brief flashing (ON/OFF):
Warning threshold for antifreeze pump and
gas valve activation.
F.
Led permanently “ON”:
Hot water programme active.
•
Led flashing (ON/OFF):
Fault for the sanitary water probe.
G.
Led permanently “ON”:
heating programme active.
•
Led flashing (ON/OFF):
Fault for the heating system probe.
KEY:
S.W.F.D. – Sanitary flow detector
S.T.P. – Sanitary temperature probe
H.T.P. – Heating temperature probe
S.T. – Safety thermostat
M.R.L.T. – Manual reset limit thermostat
I.R.B. – Luminous reset button
R.O.L. – Ready for operation light
C.P. – Circulation pump
W.S.P.S. – Water safety pressure switch
W.S.L. – No water signalling light
I.E. – Ignition electrode
D.E. – Detector electrode
I.C.U. – Ignition control unit
P.C.B. – Printed circuit board (Cod.01131)
R.L. – Remote light no ignition (max 3 mA)