Ideal Pump Station PU1 Solar 174866

The Ideal PU1 Solar pump station, part 174866, is the circulation unit fitted to Ideal solar thermal packages. It moves heat-transfer fluid around the primary solar loop, linking the roof collectors to the cylinder store, and carries the pump together with the flow and return connections for that circuit. It is listed by Ideal as a spare for the Solar Pack and Solar Thermstore range.

• Solar gain falls away, or the store does not reach its expected temperature on clear days.
• The pump runs noisily, cycles on and off, or fails to start when the controller calls for heat.
• No flow is shown at the station, or the controller logs a collector or loop fault.
• Weeping or drips appear around the pump body, unions or seals.
• Stagnation or over-temperature alarms are raised on the solar controller.

• Confirm the appliance model and serial number against the compatibility list before ordering.
• Check the number on the existing unit; 1781338 is also used to identify this item.
• Inspect unions, washers and seals when the old station is removed and renew any that are damaged.
• Solar primary circuits run hot and under pressure, so isolate, depressurise and allow the loop to cool before dismantling.