2. EPH Controls
  3. CR22_PU

EPH Controls CR22_PU Product information

  • Hello! I've reviewed the wiring diagram document for the EPH Controls S Plan Hardwired Unvented Pack, which includes the R27-HW programmer, CM2 room thermostat and related components. This document provides connection details for all components, and I'm ready to answer your questions regarding the wiring process or features described within the diagram.
  • What components are covered in this diagram?
    What should I consult before wiring the system?
    Are there any variations in boiler manufacturer wiring?
CR221PU / CR222PU / CR228PU
S Plan Hardwired Unvented Pack Wiring Diagram
Page 1 of 1
Components:
1 x 2 Channel Programmer
1 x 2 Port Motorised Valve
1 x Room Thermostat
1 x Wiring Centre
SPUR FUSED @ 3A R27-HW
Programmer
WIRING CENTRE
PUMP
BOILER
N L
12 4
CM2 HEATING VALVE
N L 1 2
1 2 4 8
3 4
HW
ON
HTG
ON
Room Thermostat
9
3
5
10
1
BROWN
BLUE
ORANGE
GREY
EARTH
N
L
1
3
10
2
1COM
N/O
8
9
N
L
1
3
10
123456789101112
N N L L
HTG
ON
ROOM
STAT
N/O
GREY
CORE OF
VALVES
ROOM
STAT
COM
230V TO
BOILER
& PUMP
BLUE
CORE
HEATING
VALVE
ORANGE
CORE
HEATING
VALVE
BROWN
CORE
ZV2
CAUTION!
Consult the boiler installation
instructions before wiring!
Boiler manufacturers wiring schematics may vary:
A permanent power supply may be required
An overrun function may be required
A volt-free signal from the motorised valves
limit switches may be required
EPH Controls Ireland
[email protected] www.ephcontrols.com
EPH Controls UK
[email protected] www.ephcontrols.co.uk
20220916_C00P-2_2901_WD_PK
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