Table 14 The R-T relation of the NTC sensors
T (
o
C) Temperature
R (
Ω
) Resistance
α
(1/
o
C) Sensitivity
-20
98660
-5,8 %
-10
56250
-5,4 %
0
33210
-5,1 %
10
20240
-4,8 %
20
12710
-4,5 %
25
10170
-4,4 %
30
8194
-4,3 %
40
5416
-4,0 %
50
3663
-3,8 %
60
2530
-3,6 %
70
1782
-3,4 %
80
1278
-3,2 %
85
1089
-3,2 %
90
931,6
-3,1 %
100
690,0
-2,9 %
110
518,5
-2,8 %
120
395,0
-2,7 %
125
346,4
-2,6 %
The sensitivity
α
is the percentage change in resistance of the sensing element per
o
C temperature
change at the specified temperature.
3 WAY ELECTR
İ
C VALVE
14
3 Way electric valve sends the central heating water coming from the main heat-exchanger to the
plate heat-exchanger when domestic hot water is needed in monothermic models. When there is no
more need for domestic hot water, valve gets back to its previous position enabling central heating.
22
fig. 13 3 Way Electric Valve
