Danfoss SET3M User manual

SET3M
Electro-Mechanical 24 Hour Programmer
for Heating and Hot Water
Installation Guide
Danfoss Heating
MAKING MODERN LIVING POSSIBLE

SET3M
2
For a large print version of these instructions
please call Marketing on 0845 121 7400.
Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other
printed material. All trademarks in this material are property of the respective companies.
Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Danfoss Heating 3
GB
Installation Instructions
SET3M
Electro-Mechanical 24 Hour Programmer
for Heating and Hot Water
Index
1.0 Installation Guide .....................................................................................4
2.0 System Overview.......................................................................................4
3.0 Installation ...................................................................................................4
3.1 Wiring.....................................................................................................6
3.2 Typical Gravity DHW Pumped HTG .............................................7
3.3 Typical Fully Pumped System with Spring Return Zone
Valve in Heating .................................................................................8
3.4 Typical Gravity DHW Pumped HTG with Spring Return
Zone Valve in DHW............................................................................9
3.5 Typical Fully Pumped System with 3-Port Mid-Position
Valve .................................................................................................... 10
3.6 Typical Fully Pumped System with Spring Return Zone
Valve in each Service ..................................................................... 11
3.7 Typical Fully Pumped System with Fully Motorised
Zone Valve in each Service.......................................................... 12
4.0 Replacement............................................................................................. 13

SET3M
4
GB
Specification
Power supply 230 ± 15% Vac, 50/60Hz
Switch action 2 x SPDT Type 1B
Switch rating
Max 264 Vac, 50/60Hz, 3(1) A
Setting accuracy ± 5 minutes
Timing accuracy ± 1 min/month
Enclosure rating IP30
Max. ambient temperature 45°C
Dimensions, mm (W, H, D) 158 x 98 x 58
Design standard EN 60730-2-7
Control Pollution Situation Degree 2
Rated Impulse Voltage 2.5kV
Ball Pressure Test 75°C
1.0 Installation Guide
2.0 System Overview
Please Note:
This product should only be installed by a qualified electrician or
competent heating installer and should be in accordance with the
current edition of the IEEE wiring regulations.
1. Fix the wallplate to the wall or flush mounted box as required.
The connections are at the top and the vertical centre line of
the unit, at the position shown on the diagram C/L (in line with
terminal ).
2. Surface cables can only enter from below the unit. If mounted on
a flush mounted box, cables can enter from the rear through the
aperture in the wallplate.
3. For mains voltage applications a link must be fitted between
terminals L, 2 and 5.
4. Whilst the unit does not require an Earth connection, a terminal is
provided on the wallplate for Earth continuity purposes.
3.0 Installation

Danfoss Heating 5
GB
5. Referring to the wiring diagrams on page 6-12, connect the unit as
shown.
6. The unit is supplied ready for use in systems having PUMPED
primaries.
Should the unit be required for use in a system having GRAVITY
primaries, fit the small plastic shorting link (which can be found
taped below the left hand fixing screw hole of the wallplate) over
the two pins on the rear of the plug-in module. These pins can
be found in the recess near to the bottom edge of the plug-in
module.
7. Ensure all dust and debris are cleared from the area.
8. Locate the module on the latches at the bottom of the wallplate
and hinge upwards to fully engage the unit connectors into the
wallplate. Tighten the two fixing screws to secure the unit to the
wallplate.
9. Before setting the programme, check the unit and circuit.
Switch ON the mains supply and press both WATER and
HEATING rocker switches to the CONSTANT position - both red
LED’s should now be illuminated. Adjust any remote thermostat
to check the services operate correctly.
Leave at least
25mm below
product Rear entry
cable access
Cable aperture
knockouts
Wall or
plasterbox
fixing
Terminal
block
Outline of
programmer
Leave sufficient space
for screwdriver access
C/L

SET3M
6
GB
NOTE: For mains voltage applications links must be fitted between
terminals L, 2 and 5.
3.1 Wiring
N/O
ON
NOTES:
FOR SET2E LINK
TERMINALS 1 & 5
FP975 ON A SET
WALLPLATE
NL123456
TIMER
OFF
COM
DHW
ON
N/C
COM
HTG
OFF
N/O N/C
Typical wiring diagrams for various types of systems are shown on
the following pages.
Note: Whilst every attempt has been made to ensure the accuracy of this
information it is recommended that the specific information relating to
the ancillary controls is obtained from the manufacturers concerned.
10. Then press both WATER and HEATING rocker switches to the OFF
position and check that both services do not operate.
11. Finally, press both WATER and HEATING rocker switches to
TIMED position prior to programming the unit.

Danfoss Heating 7
GB
Other Danfoss Randall products suitable for use with above circuit:-
RMT room thermostat.
3.2 Typical Gravity DHW Pumped HTG
Boiler Pump
N
N L 1 2 3 4 5 6
Terminals
Mains
Supply
3 amp fuse
Room Stat
N
L
D.H.W
on-com-off
HTG
/on-com-off
N

SET3M
8
GB
3.3 Typical Fully Pumped System with Spring
Return Zone Valve in Heating
Other Danfoss Randall products suitable for use with above circuit:-
AT cylinder thermostat;
RMT room thermostat;
HP22 or HP28 motorised zone valve with spring return actuator and
SPST auxiliary switch.
Boiler
and
Pump
S.R.Z.V
in
HTG
N
N L 1 2 3 4 5 6
Terminals
Mains
Supply
3 amp fuse
Room Stat
N
L
D.H.W
on-com-off
HTG
/on-com-off
Cylinder
Stat
N

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GB
3.4 Typical Gravity DHW Pumped HTG with
Spring Return Zone Valve in DHW
Other Danfoss Randall products suitable for use with above circuit:-
AT cylinder thermostat;
RMT room thermostat;
HP28C motorised zone valve with spring return actuator and SPDT
auxiliary switch.
S.R.Z.V
in
DHW
N L 1 2 3 4 5 6
Terminals
Mains
Supply
3 amp fuse
Room Sta
t
N
L
D.H.W
on-com-off
HTG
/ on-com-off
Cylinder
Stat
N
Boiler
N
Pump
N

SET3M
10
GB
3.5 Typical Fully Pumped System with 3-Port
Mid-Position Valve
Other Danfoss Randall products suitable for use with above circuit:-
AT cylinder thermostat;
RMT room thermostat;
HS3 3-port mid-position valve with spring return actuator.
Boiler
and
Pump
3-port
mid-position
valve
N
N L 1 2 3 4 5 6
Terminals
Mains
Supply
3 amp fuse
Room Stat
N
L
D.H.W
on-com-off
HTG
/ on-com-off
Cylinder
Stat
N

Danfoss Heating 11
GB
3.6 Typical Fully Pumped System with Spring
Return Zone Valve in each Service
Other Danfoss Randall products suitable for use with above circuit:-
AT cylinder thermostat;
RMT room thermostat;
2 x HP22 or HP28 motorised zone valve with spring return actuator
and SPST auxiliary switch.
S.R.Z.V
in
DHW
N L 1 2 3 4 5 6
Terminals
Mains
Supply
3 amp fuse
Room Sta
t
N
L
D.H.W
on-com-off
HTG
/ on-com-off
Cylinder
Stat
NS.R.Z.V
in
HTG
N
Boiler
and
Pump
N

SET3M
12
GB
3.7 Typical Fully Pumped System with Fully
Motorised Zone Valve in each Service
Other Danfoss Randall products suitable for use with above circuit:-
AT cylinder thermostat;
RMT room thermostat.
F.M.Z.V
in
DHW
Boiler
and
Pump
N
N L 1 2 3 4 5 6
Terminals
Mains
Supply
3 amp fuse
Room
Stat
N
L
D.H.W
on-com-off
HTG
/ on-com-off
Cylinder
Stat
NF.M.Z.V
in
HTG
N

Danfoss Heating 13
GB
Please see overleaf for a table containing replacement wiring
information.
Some time controls are connected in different ways depending upon
the type of system and/or the controls which are fitted. Consult
the column headed “NOTE: The conversion applies only if....”
to determine how the SET3M programmer’s GRAVITY or PUMPED
link should be set. If there is any doubt about the way in which the
existing programmer is connected, please contact our Technical
Services Department before proceeding with replacement.
Note: The SET3M is a direct plug-in replacement for any
existing programmers using the British Gas Standard Wallplate.
This includes the Horstmann 425 Tiara and Diadem electro-
mechanical and 525 & 527 electronic programmers.
4.0 Replacement

SET3M
14
GB
Danfoss Randall SET3M (PUMPED)
MAINS WATER HEATING
NOTE: This conversion
only applies if...
N L ON COM OFF ON COM OFF NL1 2 3 4 5 6 A BCD
Danfoss Randall 922/972 N L 3 2 1 6 5 4 Pumped/Gravity link is
set to pumped
Glowworm Mastermind N L 3 - 1 4 - 2 Horstmann 423 Amethyst 7 & 10 2,3 1 5 - 4 7 - 6 8 Horstmann 424 GEM 2,3 1,
1-0 45 67 8 9Terminals 5,8 & 10 are
linked
Horstmann Leucite 423 & 424 2 1 3 5 4 6 7 8 Terminals 5 & 7 are
linked
Honeywell ST669 N L 6 8 7 3 5 4 Landis & Gyr RWB2 N L 3 - 1 4 - 2
Pumped/Gravity link is
set to pumped
Potterton Mini-Minder N L 3 - 1 4 - 2 Potterton EP2000, EP3000 N L 3 - 1 4 5 2 A B C D Randall 3033 1,7 6 4 - 5 2 - 3 Danfoss Randall 4033 7 6 4 1 5 2 - 3 Sangamo Form 1 410 & 414 4,5 6 1 3 2 8 - 7 Sangamo S409/1 N,
1,3 L 2 - - 5 - - 6,4

Danfoss Heating 15
GB
Danfoss Randall SET3M (PUMPED)
MAINS WATER HEATING
NOTE: This conversion
only applies if...
N L ON COM OFF ON COM OFF
NL1 2 3 4 5 6 A BCD
Sangamo S409/3 3,6 7 5 - 4 1 - 2 Satchwell ‘Libra’ & DHP 2201 1 2 6 7 8 3 4 5 Satchwell ET 1401 & ET 1451 1 2 7 6 8 4 3 5 Smith Ind Centroller 90 1 2 5 - - 4 - - 3 6 Smith Ind Centroller 1000 N L 3 - 1 4 - 2 Pumped/Gravity link is
set to Pumped
Switchmaster 800 & 805 N L 3 - 4 1 - 2 Switchmaster 900 & 9000 N L 3 - 4 1 - 2 Pumped/Gravity link is
set to Pumped ABC
Venner CHC/W2 (with stat) N,
2,4 L 1 - - A/S - -
A/-S,-
3A-
/S,3
Venner CHC/W2 (air stat linked) N,
2,4 L1 - - 3 - -
Venner Ventrolnol 80M & 80PM (with air stat) N,3 L 2 - 1 A/S - 4 Used in a system having
independent control of
hot water
A/-S,5
Venner Ventrolnol 80M & 80PM (air stat linked) N,3 L 2 - 1 5 - 4

Part No. 3547v01 03/11
Danfoss Randall Ltd.
Ampthill Road
Bedford MK42 9ER
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.danfoss-randall.co.uk