Sensor Availability; Ntc Sensor Curve - Slant/Fin VGH-299-CH Installation And Service Manual

Sensor availability

The following table shows the sensor availability for all CH and DHW control modes. Sensors not mentioned in
the table are optionally available for other functions
0
T_Supply M
T_Return O
T_DHW O
T_Outdoor ---
0-10 Volt O
Water Flow DHW O
RT Switch M
M = Mandatory, O = Optional, --- = Disabled.
Table 11. 3
CH mode 0 – Central Heating demand with thermostat control
CH mode 1 – CH with an outdoor temperature reset and thermostat control
CH mode 2 – Central Heating with full outdoor temperature reset
CH mode 3 – Central Heating with permanent heat demand
CH mode 4 – Central Heating with analog input control of setpoint
CH mode 5 – Central Heating with analog input control of power output
0
T_Supply O
T_Return O
T_DHW ---
T_Outdoor O
0-10 Volt O
Water Flow DHW O
RT Switch O
M = Mandatory, O = Optional, --- = Disabled, N.A. = Not Available.
Table 11. 4
DHW mode 0 – No Domestic Hot Water
DHW mode 1 – Storage with sensor
DHW mode 2 – Storage with thermostat
DHW mode 3 – Instantaneous water heating with plated heat exchanger, flow switch and DHW-out sensor N.A.
DHW mode 4 – Instantaneous water heating with plated heat exchanger and DHW-out sensor
DHW mode 5 to 8 N.A.

NTC sensor curve

All NTC sensors are according to this characteristic: NTC 10K@25°C B3977k
Temperature Resistance
°C °F Ω
-30 -22 175203
-25 -13 129289
-20 -4 96360
-15 5 72502
-10 14 55047
-5 23 42158
0 32 32555
5 41 25339
10 50 19873
15 59 15699
Table 11. 5
62
CH Mode
1 2 3
M M M
O O O
O O O
M M O
O O O
O O O
M M M
DHW Mode
1 2 3 4
M M O M
O O O M
M --- M M
O O O O
O O O O
O O O O
O M O O
Temperature Resistance
°C °F Ω
20 68 12488
25 77 10000
30 86 8059
35 95 6535
40 104 5330
45 113 4372
50 122 3605
55 131 2989
60 140 2490
65 149 2084
E93.1601EN032.C VGH installation manual
4 5
M M
O O
O O
O
M M
O ---
M ---
5 N.A. 6 N.A. 7 N.A.
O M M
O --- O
M M ---
O --- ---
O O O
M O M
O O O
Temperature Resistance
°C °F Ω
70 158 1753
75 167 1481
80 176 1256
85 185 1070
90 194 915
95 203 786
100 212 677
105 221 586
110 230 508
115 239 443
8 N.A.
M
M
M
O
O
M
O
Temperature Resistance
°C °F Ω
120 248 387
125 257 339
130 266 298
135 275 262
140 284 232
145 293 206
150 302 183
155 311 163
160 320 145
165 329 130