Circuit Diagrams - Carbolite E Series Installation, Operation & Maintenance Instructions Manual

E range
7

CIRCUIT DIAGRAMS

7.1 Single Phase 200 to 240V wiring diagram for:
EHA12/150B to EHA12/600B & EVA12/150B to EVA12/600B
Filter
(if fitted)
F1
N
L
PE
Instrument Switch
customer
option
Figure 7-1. Wiring diagram for the EHA and EVA models
7.2 Three-zone models
The element circuit in the 3-zone versions remains the same as in diagram
control circuit contains three controllers and additional thermocouples. The sub-circuits for the
three control methods referred to in section 3.3 are:
slave
+
controller
–
master
+
controller
–
slave
+
controller
–
thermocouples
Control type A
Control type B - the diagram is like C, plus the connections between the controllers indicated in
section 3.3 C.
Three-zone control – Broadcast Comms
7.3
22
fitted to split
tube furnace
only
F2
lid
safety
switch
Over-temp.
controller
temperature
controller
SSR
slave
SSR
main
+
ref.
–
SSR
slave
centre
(master)
end
(slave)
HD
HD
HE
HE
MF65-1.01
contactor
heater
switch
coil
thermocouple
SSR
thermocouple
slave
controller
master
controller
slave
controller
end
(slave)
HD
HE
HF
e
l
heat
e
on
m
e
n
t
, but the
Figure 7-1
SSR
end
SSR
centre
SSR
end
thermocouples
Control type C
e
l
e
m
e
n
t