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Heatmiser UH8N Wiring Switch Box 8 Connection L/W

Stock Code: HE-UH1

€163.56
In Stock

Description:

The UH8-N is an 8 Zone wiring centre for use with Heatmiser 12v thermostats. The UH8-N can be used to control any actuator or valve which requires a 230v AC signal. At the same time the UH8-N offers the ability to operate a boiler or other heat source through a volt free output. Additional outputs designed for use with underfloor heating systems are also included as standard. These are the pump and valve outputs which would normally operate a manifold pump or a manifold valve. Zone 8 can be used as an isolated radiator zone by using the UFH/RAD switch. If the switch is set to RAD; When zone 8 calls for heat this will provide an output to a radiator zone valve and the boiler, but WILL NOT enable the underfloor heating pump/valve output. If the switch is set to UFH; When Zone 8 calls for heat, this will act as an underfloor heating zone, by enabling the actuator, boiler and pump/valve outputs. Any output which is not needed can be ignored.

Using BELDEN 9538 cable on the Heatmiser Network

When using this cable make sure the shield drain wire (the silver unshielded wire) is connected to earth at the UH8-N.

Using CAT5-FTP cable on the Heatmiser Network

Generally CAT5 cable comes in 3 types:

  1. CAT5-UTP (unshielded)
  2. CAT5-FTP (shielded lower cost)
  3. CAT5-STP (shielded higher cost)

For the Heatmiser network you should use CAT5-FTP - This is SHIELDED CAT5 or CAT5E

FTP stands for foil screened twisted pair

The network uses digital communications between the thermostats and Touchpad.

This digital comms line needs to be protected from interference and the CAT5-FTP does this in 2 ways:

  1. The cable is shielded from outside interference .
  2. The cables are twisted around each other in pairs.

Connect as follows:

Brown to + Brown/white to – Blue to B Blue/white to Y Orange to A1 Orange/white to A2 Green to B1 Green/white to B2 (Slimline HW-N and Touch HW-N Only)

Each set of connections forms a twisted pair in the cable canceling out any interference to or from the cables. If your cable colours are different, make sure you use a twisted pair for each of the following:

    • & -
  1. A1 & A2
  2. B1 & B2
  3. Y & B

When using this cable make sure the shield drain wire (the silver unshielded wire) is connected to earth at the UH1 end.

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