Pump plan Accessory Port
The Pump Plan base casting has a 3/4" tapping which effectively is
connected to the inlet port. It may be used for a drain cock, manual or
automatic air vent. It may also be used as a connection for a combined
open vent and cold feed. Note, it must not be possible to valve off the
open vent. For convenience a drain cock can be fitted to allow drainage of
the open vent after shutting off the cold feed.
Minimal noise from the UPP 15-50 Pumpplan
Generally, there is no noticeably increase in noise when using the Pump
Plan. The hot water head is normally set to speed one, this will help
reduce noise when pump to the hot water circuit only when compared to a
standard arrangement using a UPS15-50 set to speed 2 or 3. The weight of
the Pump Plan also helps to absorb vibration energy, thereby causing less
vibration transmitted to the system. However, if both pump heads are set
to speed 3, then there could be some increase in noise.
Other Pump Heads
to fit the Pumplan UPP 15-50
It is possible to replace the standard heating pump head with either a
UPS15-60 or an Alpha head. Always ensure that the base casting is
completely drained before removing a head. Otherwise water will enter the
windings when the gasket is loosened.
the twin headed Pumpplan unit
The unit may be installed in many ways, but always with the pump shafts
horizontal. Attention should always be given to ensure that air traps are
avoided in the system pipe work around the pump.
A bypass is needed to satisfy boiler minimum flow requirements, where all
the radiators have TRV's fitted. This should be fitted from the heating
head outlet back to the central heating return. A bypass is also needed
with unvented cylinders where a two port valve is used.
Hot Water Return
There must not be any other connections made to the cylinder return (i.e.
towel warmer, bypass). The cylinder return must be taken directly back to
the boiler return.