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The double pump station ensures a continuous circulation of the glycol inside the closed solar loop
when useful energy is available in the solar panels. The double pump station recommended by RM
Solar is constructed so as to be unaffected by the operating temperatures of the loop for many years,
however it is always recommended that in order to protect the pump that the cooler glycol returning
to the panel passes through the pump.
Double Pump Station - Technical Data
Maximum working excess pressure: 6 bar
Safety valve: 6 bar
Circulation pump: Solar Circulating Pump
Nominal voltage: AC 230V
Power consumption: Speed 1 - 45w
Speed 2 - 65w
Speed 3 - 90w
Maximum pump head: 6m
Maximum pump capacity: 6Ltr/Min
Location Of Double Pump
The double pump station must always be mounted at a level that is lower than the panels so that
no steam may penetrate the expansion vessel in case of stagnation. Stagnation occurs when the
solar panels have heat energy which is not needed by the system and the panels stagnate at around
180
o
C. If the expansion vessel is mounted at the same level or at a higher level than the panels, an
anti-gravity loop must be installed. To install an anti gravity loop the pipe work from the double pump
to the expansion vessel should be hard piped in 22mm copper pipe, the pipe should be allowed to
fall for approximately 1m from the pump, before rising 1m to enter the expansion vessel.
Important
1. Never flush the solar system with water.
2. The double pump station is not suitable for direct contact with swimming pool water.
Section 5 - Double Pump Station
Double Pump Station
Temp.
Gauge 1
Temp.
Gauge 2
Pump
Pressure
Gauge
Pressure
Relief Valve
Expansion
Hose
(Do Not
Insulate)
Flow Gauge
Filling Point 1
Filling Point 2
Expansion
Vessel
Connection
Vessel
Bracket
