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Wiring Centre4
UH8-RF V2 Wiring
The UH8-RF V2 should be fitted as close as possible to the equipment it is controlling, but never within a metal enclosure, if this cannot be avoided an
extension antenna (EA1) must be fitted and placed outside the metal enclosure.
Hot Water
This output is used to control a hot water cylinder thermostat
C = common
NO = normally open
NC = normally closed
Electrically this is a two-way switch, whatever supply is placed on the
common connection, is fed to the NC connection when there is no call
for hot water. This is then switched to the NO connection when there is
a call for hot water.
Normally the NO connection would be wired to the hot water cylinder
thermostat, then from there to the hot water valve, the valve auxiliary
switch will then start the boiler/other heat source.
Most systems will use the common and normally open connection
s.
Zones 1…8
Zones outputs are clearly marked
L = live out to actuator or valve
N = neutral to actuator or valve
There are two connections live (L) and neutral (N), both terminals
marked L are the same and both terminals marked N are the same.
Each zone output is numbered, Zone 1 will respond to radio signals
from the thermostat paired to Zone 1. Zone 2 output will respond to
thermostat numbered 2 etc.
Connections
Mains Supply
Power supply into the UH8-RF V2 which should be fused at 5 amps
these connections are marked;
L = live or phase 230v AC 50/60Hz
N = Neutral
E = Earth
Heat/Cool Enable
This is the main call for heat for the system, there are 3 connections;
C = common
NO = normally open
NC = normally closed
Electrically this is a two-way switch, whatever supply is placed on the C
connection, is fed to the NC connection when there is no call for heat.
This is then switched to the NO connection when there is a call for heat.
Most systems will use the common (C ) and normally open (NO)
connections.
Manifold Pump/Valve
Used for an underfloor heating manifold pump and or valve.
Connections are clearly marked
L = Live
E = Earth
N = Neutral
When an under-floor heating zone sends a call for heat to the
UH8-RF V2, the live & neutral output will supply 230v to the
manifold pump/valve. 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.
Hot Water Continued