Solfex Uh8-rf User manual

MODEL: UH8-RF

2 3Wiring Centre MODEL: UFH8-RF

InstallationUH8-RF - Installation Manual

Description

The UH8-RF is an 8 Zone central wiring centre for use with SOLFEX

RF thermostats.

The UH8-RF can be used to control any actuator or valve which

requires a 230v AC signal. At the same time the UH8-RF oers the

ability to operate a boiler or other heat source through a volt free

output with changeover contacts, which gives you both a heat on

signal and a heat o signal.

Additional outputs designed for use with hot water or underoor

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, and the H/W output which is used to send a

hot water on and hot water o signal.

Any output which is not needed can be ignored.

99 channel numbers are available allowing up to 99 dierent

UH8-RF wiring centres to be operated in close proximity. With 8

thermostats per wiring centre this gives you up to 792 distinct

heating zones.

When wiring directly to the heat source is not possible, a radio link

is provided to remotely enable a separate receiver, the RF-Switch.

Test switches are included for the installation engineer and further

options include creepage protection and pump delay.

Operation

Each RF thermostat used on this system can be congured as a

thermostat for either a radiator zone, underoor heating zone or in

combination mode, hot water and heating zone.

When the thermostat sends a signal for heating, the UH8-RF will

provide a 230v AC output on the paired zone and also bring on the

boiler/other heat source output. At the same time the UH8-RF can

send a radio signal to the RF-Switch.

If the thermostat is congured as an underoor heating zone, the

UH8-RF will also start the pump and valve outputs.

If an enable signal is received from a hot water time clock on the

system, only the H/W output will become active. This is a timed

output, which is normally fed to a cylinder thermostat, then to a valve,

but could also be used for towel rails. In either case the valve auxiliary

switch would operate the boiler/other heat source.

Other functions

Creepage

During hot weather the heating is not normally needed as often, this

means that valves and pumps that are not being used can seize and

refuse to operate. To prevent this, it is good practice to operate the

valve or pump once a day, the creepage function does this for you.

Once enabled the UH8-RF will operate each valve or pump for 1

minute, only if the outputs have not been operated by a thermostat,

within the preceding 24 hours. This function does not operate the

boiler output.

Pump Delay

Some valves or actuators can take more than a minute to open, if

the boiler and pump operate before the valve is open it can force a

boiler to go to lockout and stop operating. This function delays the

operation of the pump and boiler for 2 minutes to give the actuators

and valves time to open.

Engineers Test Switches

These switches allow the installation engineer to test the operation

of the valves, actuators, pumps hot water or boiler, without having to

install the thermostats.

The UH8-RF can be mounted directly to a wall using four screws or

alternatively, the unit can be DIN rail mounted.

When DIN Rail mounting, you rst need to insert the two clips

provided on the back of the UH8-RF, as shown in the image;

t On the back of the UH8-RF, position the clip in the middle and slide

down.

t Points A and B locate in the corresponding holes and lock into place.

t Locate the UH8-RF onto the DIN rail from the top.

t Pull the clip down and push the bottom of the UH8-RF onto the DIN rail.

t Releasing the clip will lock the UH8-RF in place on the DIN rail.

To remove the UH8-RF, pull both clips down and remove from the

DIN rail.

Insert clip here.

Then Slide down to lock in place.

4 5Wiring Centre MODEL: UFH8-RF

UH8-RF Wiring

Connections

Mains Supply

Power supply into the UH8-RF which should be fused at 5 amps

these connections are marked

L = live or phase 230v AC 50/60Hz

N = Neutral

E = Earth

Boiler

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.

Pump

Used for an underoor heating manifold pump.

Connections are clearly marked

L = live or phase 230v ac 50/60Hz

N = Neutral

E = Earth

When a thermostat congured as an under-oor heating zone

sends a call for heat to the UH8-RF, the live 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.

Valve

Used for an underoor heating manifold valve.

Connections are clearly marked

L = live or phase 230v ac 50/60Hz

N = Neutral

E = Earth

When a thermostat congured as an under-oor heating zone

sends a call for heat to the UH8-RF, the live output will supply 230v

to the manifold valve.

H/W

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 connections.

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.

Fuses

Each UH8-RF is protected by 3 fuses

Fuse 1. 800mA, 20mm anti-surge fuse, this fuse supplies and protects

the internal electronics.

Fuse 2. 5amp, 20mm anti-surge fuse, this fuse supplies power to all

230v outputs from the board it protects the zone, pump and valve

outputs.

Fuse 3. 2amp, 20mm anti-surge fuse, this fuse supplies power to the

pump and valve outputs, it protects the board from overloads caused

by jammed valves or seized pumps.

The UH8-RF should be tted 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 tted and placed outside the metal enclosure.

6 7Wiring Centre MODEL: UFH8-RF

Wiring Diagram UH8-RF

8 9Wiring Centre MODEL: UFH8-RF

System Setup

DIP Switches

There is a 4 way dip switch responsible for 3 functions;

1. Pump Delay

2. Creepage Enable

3. Boiler RF test

4. Not used

In normal use these DIP switches can be ignored and should be left

in the o position.

DIP Switch 1

To enable the pump delay, put switch 1 to the ON position.

DIP Switch 2

To enable creepage protection, put switch 2 to the ON position.

Pairing to the RF-Switch

On the RF-Switch, press and hold the Boiler pairing button for 5

seconds.

The Boiler status LED will switch on.

Press and release the pairing button on the UH8-RF.

When the RF-Switch detects the pairing signal from the UH8-RF, the

Boiler LED will switch o, pairing complete.

DIP Switch 3

The Boiler RF test switch is used to test communications with the RF-

Switch receiver, used for remotely enabling the boiler.

The UH8-RF sends a repeating on/o signal to the RF-Switch receiver,

when installation is complete, switch number 3 MUST be in the OFF

position.

Put switch 3 to the ON position, the UH8-RF will send a repeating on/

o signal to the RF-Switch.

The Boiler LED on the RF-Switch will ash to indicate successful

communication.

Engineers test switches

These are a block of 12 dip switches, used to test each zone, boiler,

pump and HW outputs. To enable any output, put the switch in the

ON position.

When installation is complete all switches MUST be in the OFF

position.

Record the rooms names connected to each zone with the zone

number and record the channel number you have selected, you

will need this information when installing the thermostats.

That completes the setup process.

Step 2 is to congure the thermostats and will depend on which

model you have, please refer to the thermostat instruction manual.

Step 1

Each UH8-RF board has 2 rotary switches labeled CHANNEL NUMBER, this number is used to identify the board and must be set to a unique

number.

If you are only installing one UH8-RF, you would normally set the channel number to 01. On the rotary switches this would be 0 tens and 1 unit. If

you were installing 15 UH8-RF units, you would number them 01 to 15, fteen would be 1 tens and 5 Units.

You can choose any numbers you wish up to 99 but no 2 units within radio range can have the same number

Rating

Supply 230v AC 50HC

Power Consumption 7W

Max load on boiler output 3A 230v AC restive

Max load on H/W output 3A 230v AC restive

Max load for zone outputs 3A 230v AC restive

Max Total Load 5 Amps

Optional Accessories

RF-Switch (Remote Boiler Enable)

Boost (Repeater)

Extension Antenna (EA1)

10 11Wiring Centre MODEL: UFH8-RF

NotesSystem Conguration

....................................................................................................................................................................................................................................................................................................