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420010970304 - LP-700 Rev. 000 Rel. 002 Date 4.21.21
96
Part 16 - Shutdown
A. Shutdown Procedure
If the burner is not operating, disconnect the electrical supply.
If the burner is operating, lower the set point value to 86
o
F(for high
temperature system) or 68°F (for low temperature system) and wait
for the burner to shut off. Continue to wait for the combustion
blower to stop, so all latent combustion gases are purged from the
system. This should take a maximum of 40 to 90 seconds.
B. Failure to Operate
Should the burner fail to light, the control will perform four more
ignition trials prior to entering a lockout state. Note that each
subsequent ignition trial will not occur immediately. After a failed
ignition trial, the blower must run for approximately 5 seconds to
purge the system.
If the burner lights during any one of these five ignition trails, normal
operation will resume.
If the burner does not light after the fifth ignition trial, the control
will enter a lockout state.
This lockout state indicates that a problem exists with the boiler, the
controls, or the gas supply.
Under such circumstances, a qualified service technician should be
contacted immediately to properly service the boiler and correct the
problem. If a technician is not available, press a button on the display
to wake it.
Then press the RESET button to remove the lockout state so
additional trials for ignition can be performed. If the RESET key is not
pressed (error code 501 or 503), the boiler will reset automatically
after an hour.
C. Important
It is extremely important that whenever work is performed on the
plumbing system that either:
• The appliance is powered off, and,
• The area that is being worked on is valved off and isolated.
Failure to take these measures could result in a dry-firing condition,
explosion or fire, substantial property damage, severe personal
injury, or death.
NOTICE
Table 34 - Sensor Temperature Resistance
Outdoor Sensor
Supply/Return Temperature Sensors
Tank Sensor
DHW Outlet Sensor
Outside
Temperature
(
o
F)
Resistance
(ohms)
Water Temp.
(
o
F)
Resistance
(Ohms)
-22
178605
32
27219
-13
132045
41
22021
-4
98438
50
17926
5
73995
59
14674
14
56079
68
12081
23
42846
77
10000
32
32997
86
8315
41
25609
95
6948
50
20027
104
5834
59
15777
113
4917
68
12517
122
4161
77
10000
131
3535
86
8042
140
3014
95
6510
149
2586
104
5302
158
2228
113
4343
167
1925
176
1669
185
1452
194
1268
202
1110
212
974