Vmax Fuse Location; Thermistor Resistance Vs. Temperature - NTI VM110 Installation And Operation Instructions Manual

Vmax I&O Manual
Only replace Vmax VM110 & VM110P controller fuse with identical part (LFT 3.15A,
250V "slow-blow"). Failure to follow this warning may result in component failure or
property damage.
Figure 18-1 Vmax Fuse Location (Display Assembly Removed for Illustration Purposes)
Table 18-1 Thermistor Resistance vs. Temperature
Resistance Ohms (Ω)
Temp °F (°C)
-22 (-30)
-4 (-20)
14 (-10)
32 (0)
41 (5)
50 (10)
59 (15)
68 (20)
77 (25)
86 (30)
95 (35)
104 (40)
113 (45)
* Not applicable for Return Sensor, P/N 84745
Figure 14-1 Tft Model
Temp °F (°C)
176,133 122 (50)
96,761 131 (55)
55,218 140 (60)
32,650 149 (65)
25,390 158 (70)
19,900 167 (75)
15,710 176 (80)
12,490 185 (85)
10,000 194 (90)
8,057 203 (95)
6,531 212 (100)
5,327 230 (110)
4,369 -
Operating Fuse, LFT
3.15A – "Slow-blow"
Spare Fuse
Boiler Controller
Resistance Ohms (Ω)
3,603
2,986
2,488
2,083
1,752
1,481
1,258
1,072
918
789
680
506
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│Troubleshooting
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