Heatmiser UH6, Installation Manual

Page: 5 / 20

Model: UH6
Zones 1…6 (Inputs)
Zone inputs are clearly marked at the top of the circuit board;
L = Live supply to thermostat.
= Timed switch live to thermostat, activated by the input from the time clock.
N = Neutral supply to thermostat.
S/L = 230v switch live from thermostat, this activates the corresponding zone output.
Time Clock Input
L = Live supply
E = Earth
N = Neutral supply
= Switch live input from time clock, this enables
the terminal on the thermostat connections.
Zones 1…6 (Actuator/Valve Outputs)
Zones outputs are clearly marked
L = Live out to actuator or valve
N = Neutral to actuator or valve
There are four live (L) connections and four neutral (N) connections.
The L & N connections correspond to the thermostat zone wired in at the top of the UH6.
When there’s a demand from this zone, all four sets of L & N connections are activated,
the corresponding zone LED will light up.
UFH Pump
This output is used for an underfloor heating manifold pump.
Connections are clearly marked;
N = Neutral
E = Earth
L = Live
When an under-floor heating zone sends a call for heat to the UH6, the live & neutral output will supply 230v
to the manifold pump. It is recommended that this is fed through a high limit switch placed on the heating
manifold, to protect against mechanical failure of the manifolds temperature control.
UFH/RAD (Zone 6)
This switch determines if zone 6 activates the HEAT & UFH Pump terminals as well
as the actuator/valve output, when there’s a demand.
UFH Zone
HEAT & UFH Pump Enabled
Radiator Zone
HEAT & UFH Pump NOT Enabled
UFH RAD UFH RAD
4