83 TECHNICAL CHARACTERISTICS - TEMPERATURE SENSORS
The table below gives the relationship between temperature and resistance for the following sensors; flow thermistor,
return thermistor, header thermistor.
Temperature in
o
C
Resistance in ohm
Temperature in
o
C
Resistance in ohm
10 19,900 60 2490
20 12,490 70 1750
30 8,060 80
1250
40 5,330 90 910
50
3,600
100
680
82 0-10V INTERFACE
Set the boiler to accept a 0-10V input
(see Frame 27)
no
Is the boiler set to accept a 0-10V Input?
yes
yes
Set the boiler to On Mode (see Frame 28)
no
Is the boiler set to On Mode?
yes
yes
Ensure between 2V and 10V is correctly
connected to these terminals from the
external device
no
Is a voltage of between 2V and 10V being supplied to
(D), with positive and negative connected correctly?
yes
yes
Replace Master PCB
Master PCB Box
D
Master PCB Box
57
-
Installation & Servicing
FAULT FINDING
F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING F
AUL
T FINDING
Summary of Contents for EVOMOD 250
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