7.Lower container, you may have to place the container on its empty carton to prevent the UN•LIME from flowing back into the container.
8.Let UN•LIME remain in the heater for 5 minutes and then lower the container to the "Drain" Position, see Figure 15.
9.Deliming activity is indicated by foaming on the surface of the UN•LIME. If there is deliming activity, repeat steps 6 thru 8.
Normally, lime removal will be completed within one hour. Severe
Note: To check UN•LIME for continued use, place some scale or white chalk in a glass with a small amount of UN•LIME. If the material is vigorously dissolved by the UN•LIME, it can be reused; if not, the UN•LIME should be replaced.
FIGURE 15
the appliance. The indicator codes on the ignition module are as follows:
1 flash | System lockout (retries or cycles exceeded) |
|
|
2 flashes | Pressure switch stuck close |
|
|
3 flashes | Pressure switch stuck open |
|
|
4 flashes | Open on high temperature limit switch (eco) |
|
|
6 flashes | 115 volt AC power reversed (check polarity) |
|
|
7 flashes | Low flame sense signal (make sure flame |
| sensor is in burner flame) |
|
|
8 flashes | Check ignitor |
|
|
continuous flash
continuous on
Use this diagnostic system in conjunction with the “OPERATIONAL CHECKLIST” and the “SEQUENCE OF OPERATION” to troubleshoot the appliance.
SERVICE
The installer may be able to observe and correct certain problems which may arise when the unit is put into operation. HOWEVER, it is recommended that only qualified servicemen, using appropriate test equipment, be allowed to service the heater.
As preliminary step, check wiring against diagram, check for grounded, broken or loose wires. Check all wire ends to be sure that they are making good contact.
IGNITION MODULE SYSTEM
Before calling your service agent, the following checklist should be examined to eliminate obvious problems from those requiring replacement or servicing.
—Check that “main manual gas shutoff valve” is fully open and that gas service has not been interrupted.
—Check that after following the appliance OPERATING INSTRUCTIONS, the “Top Knob” of the appliance gas valve is in “ON” position.
—Check electrical supply to the appliance for possible blown (or tripped) fusing or power interruption.
—Is the water temperature in tank below the thermostat dial setting on the appliance thermostat (calling for heat)?
—It is possible that the high limit (E.C.O.) has functioned to shut off the appliance. See FEATURES — Water Temperature Control for reset procedure. Contact your serviceman if limit continues to function to shut off appliance.
ELECTRICAL SERVICING
CAUTION
LABEL ALL WIRES PRIOR TO DISCONNECTION WHEN SERVICING CONTROLS. WIRING ERRORS CAN CAUSE IMPROPERAND DANGEROUS OPERATION.
VERIFY PROPER OPERATION AFTER SERVICING.
REPLACEMENT PARTS
Replacement parts may be ordered through A.O. Smith dealers, authorized servicers or distributors. Refer to the Yellow Pages for where to call or contact the A.O. Smith Water Products Company, Product Service Division, 5621 West 115th Street, Alsip, IL 60803,
SYSTEM DIAGNOSTICS
Your water heater is equipped with an ignition module that |
|
incorporates a diagnostic system to assist in troubleshooting | REPLACEMENT PARTS |
24