5-3
TROUBLESHOOTING
SL 10-85 G3, SL 14-115 G3, SL 20-160 G3, SL 30-199 G3 MODULATING GAS BOILERS
5.2.2 Fan
The fan is controlled by the SIM
+
, and powered via one cable.
5.2.3 Water Pressure Sensor
The water pressure sensor ensures that there is adequate pressure in the heating system
for safe operation. The pressure is displayed in PSI as the default. If the system pressure
should drop below 8PSI the firing rate of the boiler is reduced. If the pressure drops to
4PSI or lower, the boiler will not fire.
Check operation of the sensor by isolating the boiler from its system piping. Close the
system fill valve, and then crack the pressure relief valve. The pressure displayed should
reflect declining pressure. If it remains “fixed”, drain the boiler and replace the sensor, or
dislodge any blocking debris from the sensor inlet channel and reinsert.
5.2.4 Safety and Ignition Module (SIM
+
)
The SIM
+
is a safety control that is certified to conform to the UL 60730-5-5 and ANSI
Z21.20-2014 • CAN/CSA-C22.2 No. 60730-2-5-14 Standards. The low water cutoff
function and the high temperature manual reset function also conform to these standards.
The SIM
+
directly controls the boiler’s gas valve and provides:
•
Direct spark automatic ignition
•
Flame detection and current measurement
•
Supply water temperature sensing
•
Flue gas temperature sensing
•
Supply water maximum temperature shutdown
•
Flue gas maximum temperature shutdown
•
Low water cut-off.
Summary of Contents for SL 20-160 G3
Page 75: ...6 3 DIAGRAMS SL 10 85 G3 SL 14 115 G3 SL 20 160 G3 SL 30 199 G3 MODULATING GAS BOILERS...
Page 77: ...6 5 DIAGRAMS SL 10 85 G3 SL 14 115 G3 SL 20 160 G3 SL 30 199 G3 MODULATING GAS BOILERS...
Page 79: ...6 7 DIAGRAMS SL 10 85 G3 SL 14 115 G3 SL 20 160 G3 SL 30 199 G3 MODULATING GAS BOILERS...
Page 85: ...SERVICE RECORD DATE LICENSED CONTRACTOR DESCRIPTION OF WORK DONE...
Page 86: ...NOTES...
Page 87: ...NOTES...
