Heat Transfer MODCON VWH 300 HL, Installation & Maintenance

Page: 64 / 80

PART 12: TROUBLESHOOTING
(CONTINUED)
NOTE: If receiving
an F09 fault code,
c h e c k t h e g a p
spacing between
points on the elec-
trode by holding
t w o q u a r t e r s
together and slid-
ing them through
t h e g a p . T h e r e
should be a slight
resistance.
Resistance Table
Fig. 12-3 Fig. 12-4
GAS-FIRED HOT WATER SUPPLY BOILER
Boiler Manual
63
PART 13: MAINTENANCE
A. MAINTENANCE PROCEDURES
Periodic maintenance should be performed
once a year by a qualified service technician to
assure that all the equipment is operating safely
and efficiently. The owner should make neces-
sary arrangements with a qualified heating con-
tractor 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.
n
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.
Water 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
System/Pipe Sensor Temperature Sensor 7250P-324
Boiler Sensor (7250P-667) Indirect/Tank Sensor (72 50P-325)