Bosch HP200-1, Technical Manual

Page: 23 / 56

Page 23 from 56
6-720-821-364 SM HP270
– 250 - 200 2016/12 en
The NTC sensor for bottom water temperature measurement is with clip included to detect temperature by contact
and does not need conductivity thermal paste. In The HP270-3 and HP200/250-1 the same sensor becomes
discharge temperature control (T
dis
) as it is located between Electric heater and tank .
The NTC sensors for air and hot water are the same component, but give different information to the software in
the electronic control. Following table indicates the measurable resistance value to check and identify each proper
function, depending on the correspondent assembly position.
These NTC sensors (air and hot) are from 10kΩ type. In case their minimum and maximum operation values are
below or above the expected temperature/resistance values, the display will present the correspondent error code.
The NTC sensor in the fins is a 8kΩ type with characteristic listed on table 9.
Temperature
(ºC)
NTC Resistance ( Ω )
(8kΩ type)
(fins NTC)
NTC Resistance ( Ω )
(10kΩ type)
(air & hot NTC)
NTC Resistance ( Ω )
(10.1kΩ type)
(cold or discharge NTC)
-10 37450 55330
-5 29710 42320
0 23730 32650 30400
5 19090 25390 25902
10 15450 19900 20247
15 12580 15710 15950
20 10310 12490 12657
25 8495 10000 10115
30 7037 8057 8138
35 5860 6531 6589
40 4905 5327 5367
45 4125 4369 4398
50 3485 3603 3624
55 2957 2986 3002
60 2521 2488 2500
65 2157 2083 2092
70 1853 1752
1759
75 1598 1481 1486
80 1384 1258 1260
85 1202 1072 1074
90 1048 917 918
95 916 788 788
100 804 680 680
Table 9 – NTC characteristic
Model
HP270-2
+5ºC / +35ºC
Model
HP270-2
-10ºC / +35ºC
Model
HP270-3
-10ºC / +35ºC
Model
HP200/250-1
+5ºC / +35ºC
Component Characteristics
X X X X Air Flow NTC (T air) R 10k = 25ºC = 10000 Ω
X X X X Hot Water NTC (T top) R 10k = 25ºC = 10000 Ω
X X
Cold Water NTC (T
bottom)
R 10k = 25ºC = 10115 Ω
X X
Discharge water NTC
(after e-heater)
R 10k = 25ºC = 10115 Ω
X X X X Fins NTC (T fins) R 8k = 25ºC = 8400 Ω
X X X
Pump Wilo
(ZRS12-2/3 Ku-C)
230 (196 – 253) V ac
50 (47,5 – 52,5) Hz
19 / 32 / 48 W
(0,10 / 0,15 / 0,21 A)