Although some new generation boilers can provide low temperature water for UFH systems, most heating systems require high as well as low water temperature. Even if the space heating is with Pexatherm UFH, the indirectly heated cylinder and the desirable towel rail require water at higher temperature than the underfloor system. Then a water mixer valves (blenders) are needed at the manifold or near the boiler.
Pexatherm standard control system uses 2 and 3-port mixer valve to reduce the water temperature to the floor. The manifolds and the mixers connect directly to the boiler flow and return pipes or via the primary manifold.
2-port mixers are used with the all-in-one UFH manifolds sets.
More than one UFH manifold can be connected to the boiler using the Pexapipe primary connection.
UFH manifold plus 3-port mixer valve and pump.
The Pexatherm motorised 3-port mixer
The 3-port mixer (minimix) with its servo motor is needed when the Delta is used in the advanced control system. The principle of operation is as in the above 3-port mixer but the mixing is dependant on the outside and mixed water temperature and hence the response time is faster to weather changes.
The
UFH Water Temp. Control System
The UFH
pump, part of the Pexatherm all-in-one manifold set, draws water from
the boiler or from the floor return pipes. The mixing takes place in and
around the pump. The 2-port mixer allows the right amount of hot water
from boiler as dictated by its setting and measured by its sensor.
This process is continuously adjusted to ensure the right water temperature
in the floor. Hence more water is allowed from the boiler by the mixer
at the begining of each heating cycle or when the outsude temperature
is low. This method is by far superior to fixed mixing offered by others
and does not require a motorised valve opening and closing to provide
water temperature adjustment.
UFH manifold with 2-port mixer valve and pump.
The Pexatherm
4-port minimx
The 4-port minimix provide variable by-pass on both sides of the mixer.
These mixers are used with oil fired boilers and multi-fuel stoves requiring
high temperature return. The Delta controls the servo motor required with
this mixer.
These mixers are often used with large installations such as in commercial
properties. They are not suitable for condensing boilers.
UFH manifold plus 4-port mixer valve and pump
Low temperature valve on towel rail radiator to UFH circuit in bathroom
IPPEC supplies a special valve which connects an underfloor heating PEXc pipe to a radiator (or a heated towel rail). This adjustable valve reduces the temperature of the water from the radiator to the floor to below 60 deg. C.
Since the heat is now shared between the radiator and the floor (and since we are only relying on the one pump for the central heating), the pipe length should be no more than 50 m long. Hence the system is ideal in small areas such as a bathrooms. This is a great welcome feature for homes without first floor underfloor heating.
The UFH pipe is conneted to the return of the towel rail and to the return pipe from the rest of central heating. see package in the web shop using this valve.
Recently IPPEC introduced the BM Mini set designed for small to medium underfloor heating systems. The set incoorperates a small pump, water temperature mixer and connections to one or two underfloor heating circuits. On one side the unit connects to the flow and return of the primary heating circuit and at the other end to the underfloor heating pipes.
The primary circuit could be an existing radiator heating or straight from the boiler. This is a great set for homes wishing to have an extension heated with underfloor heating.
Please visit the web shop to see packages with this set and to see the BM Mini offered under components.
