Carbolite CFM Series - Manual (Page 13)

CFM
MF10 - 3.08
13
7.0 C IRCUIT D IAGRAMS
Safety switches: where the furnace rating is over 16A, there is a single switch in the contactor coil
circuit, and the double switch shown is not present (both examples are shown in 7.2).
7.1 Single Phase
7.2 1400°C Model with Auxiliary Heater (current models)
Instrument Switch
coil
temperature
controller
overtemp.
controller
SSR
e
l
e
m
e
n
t
(s)
heat
on
safety
switch
F3
F1
F2
F3
PE
Filter (if fitted) Contactor
thermocouple
thermocouple
coil
SSR
e
l
e
m
e
n
t
(s)
F3
F1
F2
F3
N
L
if o/temp fitted
Instrument Switch
coil
main
controller
overtemp.
controller
safety
switch B
SSR
e
l
e
m
e
n
t
heat
on
safety
switches A
F3
F1
F2
F3
N
L
PE
Filter (if fitted)
contactor
if fitted
if fitted
thermocouple
aux
controller
thermocouple
e
l
e
m
e
n
t
F3
heat
on
SSR
thermocouple