Danfoss SET3M Installation guide

MAKING MODERN LIVING POSSIBLE

Danfoss Heating

SET3M

Electro-Mechanical 24 Hour Programmer

for Heating and Hot Water

Installation Guide

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.

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SET3M

Installation Instructions

SET3M

Electro-Mechanical 24 Hour Programmer
for Heating and Hot Water

GB

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

Danfoss Heating

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GB

1.0 Installation Guide

Please Note:

This product should only be installed by a qualifi ed electrician or
competent heating installer and should be in accordance with the
current edition of the IEEE wiring regulations.

2.0 System Overview

Specifi cation

Power supply 230 ± 15% Vac, 50/60Hz

Switch action 2 x SPDT Type 1B

Switch rating

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

Max 264 Vac, 50/60Hz, 3(1) A

3.0 Installation

1. Fix the wallplate to the wall or fl ush 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 fl ush mounted box, cables can enter from the rear through the
aperture in the wallplate.

3. For mains voltage applications a link must be fi tted 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.

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SET3M

Leave suffi cient space

Outline of
programmer

Leave at least
25mm below
product

C/L

Rear entry
cable access

for screwdriver access

Terminal
block

Wall or
plasterbox
fi xing

Cable aperture
knockouts

5. Referring to the wiring diagrams on page 6-12, connect the unit as
shown.

GB

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, fi t the small plastic shorting link (which can be found
taped below the left hand fi xing 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 fi xing 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.

Danfoss Heating

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