Grundfos UPS15-65 AOS Circulating Pump 1.029646

The Grundfos UPS15-65 AOS is a circulating pump used to move water around the heating circuit of an Alpha Commercial PRO TEC 50 (LPG) appliance. It is listed under the Alpha part number 1.029646 and is the pump specified against this commercial model.

• The pump runs but the appliance shows poor or no circulation, with flow and return temperatures failing to behave as expected.
• Grinding, humming or rattling noise from the pump body that continues after venting and does not clear.
• The pump does not start when the appliance calls for heat, or it stops intermittently.
• Water weeping from the pump housing, flange faces or seal area.
• Repeated lockout or overheat faults on the appliance traced to the pump circuit.

• Confirm the appliance model is the Alpha Commercial PRO TEC 50 (LPG).
• Check the pump currently fitted and confirm the model reference matches UPS15-65 AOS.
• Check the pump body, flange and connections for condition before ordering, so any associated seals or fittings can be dealt with at the same time.
• Isolate the electrical supply and the water circuit before removal and fitting.