Specifications
Boiler Enable
L SL
TWO PORT VALVE
SL N PE
FUSE T1 T2
PE N SL
BOILER
PUMP RELAY
BOILER RELAY
1
2
4
A
B
1
2
1
2
1
2
1
2
1
2
4
A
B
1
2
4
A
B
1
2
4
A
B
4421
1 / 2
PROBE
4421
1 / 2
PROBE
RELAY 1
RELAY 2
RELAY 3
RELAY 4
ON
OFF
ON
OFF
ON
OFF
ON
OFF
FUSE 1
230v Mains AC Supply
(from common Boiler /
or System Spur)
UNDERFLOOR HEATING MANIFOLD
Notes
Note 1
Note 2
Programmable Room Stats
Battery powered (3 x AA). Requires
only 2 wires to connect to wiring centre.
Programmable Room Stats can be used
together with Set-Back Stats on the same
system.
Fuses
Fuse 1 Power Supply
2.5A Slow Fuse
ROOM STAT
WITH SET BACK
(USING SET BACK
CHANNEL A)
ROOM STAT
WITH SET BACK
(USING SET BACK
CHANNEL B)
PROGRAMMABLE
ROOM STAT
OPTIONAL 4 CHANNEL
REMOTE SYSTEM TIMER
OPTIONAL PLUG-IN SET BACK TIMER
OPTIONAL 2 PORT
ZONE VALVE
See Note 2
Wiring Diagram
230v 4 Zone Master
Wiring Centre
Date : 01-11-08 Issue 3 Drawn By : MCC/NS
Tel . 01895 449233
Fax . 01895 420321
www.speedfit.co.uk
ufh@johnguest.co.uk
JG Speedfit Ltd., Horton Road West Drayton, Middlesex, UB7 8JL
Technical Helpline 01895 425333
Electrical Installtion Helpline 01254 776343
Heat Source
3 Amp Fused Spur
Optional UFH Manifold Zone Valve
used only to prevent flow of water
to manifold when UFH is off and another
ciruit is in operation.
If Zone Valve is not used a link needs to
be placed between end switch connections
marked 1 & 2 to enable boiler firing,
Note 4
See Note 4
Note 3
Set Back Control
Option 1
Plug-in Centralised System Timer
Plugs directly into wiring centre &
offers 2 time set-back/low temperature
time channels (Channel A & B)
Option 2
Remote System Timer
Hard wires into wiring centre time
channel A/B as per diagram.
When a time channel is activated ,
this causes any Set-back thermostats
connected to that channel to operate
at 4°C lower than the temperature set
on the stat.
The overall result is an automatic
reduction in room temperature during
the times programmed by
the user.
See Note 3
See Note 3
See Note 5
Note 5
4 Channel Remote System Timer
Any free time channel not used as
per Note 3 can be used to provide
time control for DHW or radiator /
towel rail circuits.
Up to 2 Actuators can be connected to the
same terminal. ie max 4 actuators per
zone block.
Factory fitted link
remove if using a
motorised valve
PE N SL
UFH PUMP
E N L
MAIN SUPPLY
UFH
NC COM NO