Carbolite HRF 7/45 - Manual (Page 9)

HRF
MLF05-1.23
9
7.0 C IRCUIT D IAGRAMS
7.1 Single phase
7.2 Higher Voltages
For 254V (or above) an isolating transformer is fitted in the
control circuit after the F2 fuses.
Instrument Switch
coil
temperature
controller
thermocouple
overtemp.
controller
thermocouple
SSR
e
l
e
m
e
n
t
(s)
heat
on
F1
F2
N
L
E
EMC Filter contactor
R
BU
Fan
Motor
Capacitor
BR
BU
if overtemperature fitted
see note
note: In models made before late 2003 the fan was connected to the live side of the Instrument
switch. In later models the fan is connected to the switched side of the Instrument switch.
F2
F2
transformer
Instrument Switch