Hubbell Electric Heater Company SLN Section Iv - Troubleshooting Solar Water System, Symptom

SECTION IV – TROUBLESHOOTING

SOLAR WATER SYSTEM

Symptom	Probable Cause	Corrective Action / Remedy
Gradual loss of heating	Tubes are fouled.	Clean tubes per Section III, annual
capacity.		scheduled maintenance.
	Excess silt in bottom of tank.	Drain and flush tank per Section III ,
		annual scheduled maintenance.
Overheating.	Ruptured tube(s) in heating	Remove / replace heating coil.
	coil.
	Thermostat needs adjusting.	Adjust thermostat
	Circulator not operating.	Repair or replace per separate O&M.
Immediate loss of heating	Blockage in return line.	Clean blockage from return line.
capacity.
Excessive vibration.	High rate of flow beyond	Consult factory.
	design conditions.
	Under sized piping to the	Re-pipe lines to unit using proper
	unit.	sized lines.
Water hammer.	Undersized return lines.	Re-pipe return line using proper sized
		lines.
	Insufficient slope on return	Increase slope on return lines.
	lines causing backup.

*Red symptom indicates that equipment should be shut down immediately and cause of malfunction corrected before unit is re-started or serious damage may result.

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