header_red
 
 
 
 
 

Controls

Underfloor heating requires water flow temperatures of approximately 45°C to 55°C dependent upon the design, heat loading and type of underfloor heating system.  With a typical temperature drop across the underfloor heating flow and return of between 5°C and 10°C the return water temperatures will be as low as 35°C.  This is important when considering the type of boiler to be used in conjunction with the heating system which may need additional controls to provide protection from low return temperatures.
Control of the underfloor heating flow water temperature is by means of mixing return water from the underfloor heating with flow water from the primary pipework.  The mixed temperature is controlled at a constant temperature and the proportions of flow and return water is varied accordingly.  Mixing is undertaken in a three port mixing valve, either a thermo-mechanical device or an electrical mixing valve and controller.

Individual rooms fed from the same manifold can be controlled by means of room thermostats and Myson thermoelectric actuators.  Myson thermoelectric actuators can be supplied in 230v or 24v options and are designed for simple snap fitting to the regulating valves on the return header of the manifold.  They operate by means of wax filled bellows with a heating element.  When there is a call for heat the heating element is energised, heating the wax, which expands, causing the valve to open.

When multiple room control is required, the room thermostats can be wired through a Myson Wiring Centre.  This has the advantage of providing a boiler and pump demand as well as connections for time channel input.

Myson offer a wide range of controls to complement any system.

Insert Hard Wired pic & wiring diagram

24V Room Thermostat

  • Simple and accurate
  • Temperature range 6 to 30ºC
  • Modern neutral design

MRTE Thermostat

  • Upmarket electronic thermostat
  • Attractive slimline design
  • Clear, accurate LCD display
  • No neutral, two wire connection

MPRT Thermostat

  • Easy to use slimline multifunctional thermostat
  • Seven-day programming
  • Three temperature settings – comfort, economy (set back) and frost
  • Four programmes (three preset, one adjustable) with manual override
  • Clear, accurate LCD display
  • Vacation delay setting from 1 hour – 50 days
  • Installer optional adjustments (differential, calibration, heat or coool, frost setting, 1 minute pump on function, high and low limit adjustment settings, password protection)
  • No neutral, two wire connection

Wireless Controls

Base Unit

  • 230V Supply
  • Can control up to 20 actuators and 6 room thermostats
  • Units can be joined for larger applications
  • Night set back facility (4º
  • Option to exercise pump and valves daily to prevent seizing or sticking

Thermostat

  • No external wiring connections
  • 30 metre spherical transmission range
  • Ambient temperature 0 - 50ºC
  • One thermostat can control several loops
  • Temperature scale 10 - 30ºC + / - 2K
  • Battery service life – minimum 5 years