
63
GAS-FIRED BOILER
Boiler Manual
PART 15: MAINTENANCE
A. MAINTENANCE PROCEDURES
Periodic maintenance should be performed
once a year by a qualified service technician to
assure that all the equipment is in safe efficient
operation. The owner can make necessary
arrangements with a qualified heating contrac-
tor for periodic maintenance of the heater.
Installer must also inform the owner that the lack
of proper care and maintenance of the heater
may result in a hazardous condition. The
installer should discuss the contents of the
User's Information Manual with the owner.
Outdoor Sensor (7250P-319)
Outside Temperature (°F) Resistance (ohms)
–22
171800
–13
129800
–4
98930
5
76020
14
58880
23
45950
32
36130
41
28600
50
22800
59
18300
68
14770
77
12000
86
9804
95
8054
104
6652
113
5522
Boiler Sensor (7250P-667)
Indirect Sensor
(7250P-320)
Boiler and Indirect Temperature (°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
203
786
212
667
PART 14: TROUBLESHOOTING
(CONTINUED)
Resistance Tables
Fig. 14-4
Fig. 14-3
NOTE: If receiving an
F09 fault code, check
t h e g a p s p a c i n g
between points on the
electrode by holding
two quarters together
a n d s l i d i n g t h e m
through the gap. There
s h o u l d b e a s l i g h t
resistance.
WARNING
BEFORE EACH HEATING SEASON
A trained
and qualified service technician should perform
the inspections as per the boiler inspection and
maintenance schedule in the back of manual.
Failure to do so could result in death or serious
injury.
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