A.O. Smith Cyclone XL 100 Series, Руководство по обслуживанию

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6. Temperature-Pressure Relief Valve. See Temperature-Pressure Relief Valve (page 14).
7. 1” Honeywell modulating 24 VAC gas valve.
8. 6” PVC air intake connection.
9. Honeywell Venturi Mixing Unit.
10. Combustion blower.
11. Combustion sight glass.
12. Flame Sensor: The control system also monitors the flame sensor to confirm a flame is present at the Main Burner. If a flame is not
verified during the ignition trial period (3-5 seconds) the control system will immediately de-energize the 24 VAC Gas Valve. See
Sequence of Operation Flow Chart
(page 54).
13. Spark Eletrode: The control system energizes the spark ignition control with 120 VAC during the ignition period. The spark ignition
control then sends a high-voltage electrical current to the spark igniter which in turn ignites the main burner air/gas mixture.
14. Premix burner.
15. Spark Ignition Control. When energized, sends the electrical current to the spark igniter.
16. Temperature Probe: The water heater’s control system monitors this probe to measure The heater’s water temperature. The probe
also houses the ECO (energy cut out) switch. This is a non adjustable high temperature limit switch. The ECO switch contacts are
normally closed and will open on a temperature rise. See
High Temperature Limit Control (ECO)
(page 36).
17. Powered anode rods: The water heater’s covered in this manual are equipped with 3 powered (non sacrificial) anode rods at the
top. Protective current is fed by the control system to the titanium electrodes at the end of each anode rod. This current flows
through the water to the conductive surfaces inside the storage tank which diminishes the corrosive effect of water when it comes
in contact with steel.
18. Blocked Intake Air switch. Normally closed contacts that open on fall in pressure. This switch is used to insure intake (combustion)
air to the water heater is not restricted. The control system monitors this switch and will disable heating operation if its contacts are
open during a heating cycle.
19. Blocked Exhaust (vent) switch. Normally closed contacts that open on a rise in pressure. This switch is used to insure the Exhaust
(vent) piping connected to the water heater is not restricted. The control system monitors this switch and will disable heating operation
if its contacts are open during a heating cycle.
20. CPAM (Commercial powered anode module ).
21. Power supplier for CPAM.
22. 75VA transformer.
23. Side-mounted powered anodes.
24. Heater’s internal recirculation pump.
25. Flow switch, vertically mounted, used for confirmation of water flowing through the secondary heat exchanger during the heater’s
running.
26. Flue temperature sensor.
27. 2” NPT Gas supply connection.
28. Water heater drain valve.
29. 2”NPT cold water inlet connection
30. 2” NPT hot water outlet connection.
31. 1” NPT building recirculation return connection.
32. ½” NPT condensate drain connection.
33. Cleanout access panel, covers water heater cleanout opening and ASME plate.