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lp-441 Rev. 004 Rel. 000 Date 7.2.21
37
Resistance Table for Supply Temperature Sensor
High / Low Temp Sensor Temp. (
o
F)
Resistance (Ohms)
32
32550
41
25340
50
19870
59
15700
68
12490
77
10000
86
8059
95
6535
104
5330
113
4372
122
3605
131
2989
140
2490
149
2084
158
1753
167
1481
176
1256
185
1070
194
915
202
786
212
667
Table 16 - Supply Temperature Resistance Sensor
C. Maintenance
The control system requires no periodic maintenance under
normal conditions. However, in unusually dirty or dusty conditions,
periodic vacuuming of the cover to maintain visibility of the display
and indicators is recommended. In dirty environments, such as
construction sites, care must be taken to keep the water heater
burner cover in place and drywall or saw dust away from water
heater.
In unusually dirty or dusty conditions care must be taken to
keep water heater burner door in place. Failure to do so VOIDS
warranty.
Figure 25 - Sealing the Water Heater for Sanitary Applications
Allowing the heater to operate with a dirty combustion chamber will
hurt operation. Failure to clean the heat exchanger as needed by the
installation location could result in heater failure, property damage,
personal injury, or death. Such product failures ARE NOT covered
under warranty.