heatmiser UH6 Compact Wiring Centre Installation Guide

heatmiser UH6 Compact Wiring Centre

UH6 – Installation Manual

Description

The UH6 is an 6 Zone wiring centre for use with Heatmiser 230v powered thermostats.
The UH6 can be used to control any actuator or valve which requires a 230v AC signal to open. For mid position valves and those requiring a closing signal, a changeover relay would be required.

At the same time, the UH6 offers the ability to operate a boiler or other heat source through a volt free output.
A manifold pump output designed for use with underfloor heating systems, is also included as standard.

When zones 1-5 are being used for underfloor heating zones, zone 6 can be used as an isolated radiator zone by using the UFH/RAD switch.

Switch set to RAD;
When zone 6 calls for heat this will provide an output to a radiator zone valve from the 4 x 230v L & N zone outputs , but WILL NOT enable the Heat or UFH Pump outputs.

Switch set to UFH;

When Zone 6 calls for heat, this will act as an underfloor heating zone, by enabling the 4 x actuator, Heat and UFH pump outputs.

Removing Cover & Din Rail Installation

The UH6 can be mounted directly to the wall using the two screw holes in the back, or alternatively, the unit can be DIN rail mounted, as shown here

UH6 Explained

UH6 Wiring

Cable sizes that can be used: Stranded cable 0.75mm – 1.5mm. Solid core cable 1.0mm – 1.5mm

Cable lengths for zone inputs should be measured according to the diagram shown below.
The L, , N & S/L cables are the same length for all zones as shown in the diagram on the left.
The length of the earth cable will differ depending on the zone number being wired.
The cable size example on the left shows the longest earth cable length from zone 6 on the far right, to the earth connection block on the far left.
Below shows an example of how the earth wire on each cable should connect to the earth connection block.
The Time Clock input does not need to be connected to the earth connection block.

Connecting Mains Supply

• Clamp the insulated part of the cable in the cable grips.

• Position the mains supply L (Live) cable in the L slot.
  Position the mains supply Neutral cable in the N slot. Push into the groove to hold cable in position.

• Connect the earth cable from the mains supply into the first earth connection on the UH6 earth terminal block.

• Using approx 170mm length of earth cable, link from the first earth connection on the UH6 earth terminal block, and position in the mains supply E (earth) slot, as shown here.
  Push into the groove to hold cable in position.

Timeclock & Zone Connections

• thermostats, connect the Time Clock cable as shown here.
  The earth cable from the time clock goes directly in the earth slot.

• Wire the thermostat connections as shown here, connect the earth from the thermostat to the earth connection block on the left, repeating for additional zones.

• This example shows wiring for programmable thermostats that do not require a master time clock on the system.
  Note: The connection is not used. Repeat for additional zones.

Installing UH6 Front Module

Inserting Thermostat Cables

Once the front module has been locked in position, the next step is to bend each cable around and insert into the cable clamp.
As shown here.
For stranded cables, it may be necessary to twist the cable strands & open the cable clamp before inserting the cable.

You may have a preference of inserting the cables from right to left or left to right. Once you’ve finished inserting your thermostat cables, the UH6 will appear similar to as shown below .

Inserting Actuator Cables

Each zone output has connections for up to 4 x 230v actuators.

• 1st Actuator: Use the lower left side L & N connections. Clamp the insulated part of the actuator cable in the cable grips by pushing upwards.
  Bend the actuator wires around & insert the Neutral wire into the lower N connection. Then insert the Live wire into the lower L connection. As shown in image 1.

• nd Actuator: Use the lower right side L & N connections. Clamp the insulated part of the cable in the cable grips by pushing upwards.
  Bend the actuator wires around & insert the Neutral wire into the lower N connection. Then insert the Live wire into the lower L connection. As shown in image 2.

• 3rd Actuator: Use the upper right side L & N connections. Clamp the insulated part of the cable in the cable grips by pushing upwards.
  Bend the actuator wires around & insert the Neutral wire into the upper N connection. Then insert the Live wire into the upper L connection. As shown in image 3.

• 4th Actuator: Use the upper left side L & N connections. Clamp the insulated part of the cable in the cable grips by pushing upwards.
  Bend the actuator wires around & insert the Neutral wire into the upper N connection. Then insert the Live wire into the upper L connection. As shown in image 4.

Repeat this process for all other zones, any outputs that are not needed can be ignored.

Inserting UFH Pump & Heat Output Cables

UFH Pump:
Connections are marked;
N = Neutral
E = Earth
L = Live
When a zone calls for heat*, 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.
Clamp the insulated part of the cable in the cable grips by pushing upwards.
Then insert the Earth wire into the E connection.
Next insert the Neutral wire into the N connection, as shown here.

Heat: This is the voltfree heat output for the system and should be wired to your heat source. Connections are marked;
LS = Live Supply
LS = Live Supply
LR = Live Return
LR = Live Return
Electrically this is a volt free switch, whatever supply is placed on either of the LS connections, is fed to the LR connections when there is a call for heat*.
Clamp the insulated part of the cable in the cable grips by pushing upwards.
Bend the wires around & first insert the LR wire into the LR connection.
Then insert the LS wire into the LS connection, as shown here.

*The Heat & UFH Pump outputs are not activated for zone 6 when the switch is set to Rads, explained on page 1.

Fitting the front cover

UH6 – DS-SB 6 ZONES WITH TIME CLOCK (5 X UFH, 1 X RADIATOR ZONE)

This equipment should be installed by an appropriately qualified/registered electrician.
Fully read the instructions for proper wiring before applying power.
The warranty does not cover damage from improper wiring or installation.

UH6 – NEOSTAT 6 ZONES (5 X UFH, 1 X RADIATOR ZONE)

This equipment should be installed by an appropriately qualified/registered electrician.
Fully read the instructions for proper wiring before applying power.
The warranty does not cover damage from improper wiring or installation.

UH6 – 230v Thermostat Range

This equipment should be installed by an appropriately qualified/registered electrician.
Fully read the instructions for proper wiring before applying power.
The warranty does not cover damage from improper wiring or installation.

Products Commonly used with the UH6 wiring centre.

Want More Information?
Call our support team on: +44 (0)1254 669090
www.heatmiser.com

DS-SB v3
Heatmiser UK Ltd
Units 1-5 Hurstwood Court, Mercer Way
Shadsworth Business Park, Blackburn,
Lancashire, BB1 2QU, United Kingdom.

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