Danfoss FP975 Data sheet

Datasheet

FP975
Electronic 7-Day Programmer

Application

The FP975 7-day full programmer off ers all
the control fl exibility and user features of its
counterpart, FP715, in the regular Mk18 range,
but with two important diff erences:

1) This unit is intended specifi cally to replace, or
upgrade systems with, Danfoss Randall Mk.9
time controls. They have British Gas Standard
wallplates which are used by many other
models, including the Danfoss Randall SET
range, the Horstmann 425 Diadem and Tiara,
and their 525 and 527 models.

2) This model has voltage-free output contacts,
making it applicable to systems with low
voltage control circuits, e.g. combination
boilers or warm air.

The unit is supplied with a SET wallplate but,
simply by re-positioning a small switch on the
back, interchangeability is achieved with Mk.9
controls.

Replace models With
922 & 972 FP975

The FP975 is supplied as a full 7-day control, but
the installer can easily and quickly convert it to a
weekday/weekend or 24 hour unit if preferred.

• British Gas Standard wallplate provides

interchangeability with other popular time
controls

• Total control fl exibility

• Easy Programming

• Stylish, compact design

• Easy change to Weekday/Weekend control

• Easy GMT/BST time change

• Day programme copy facility

• AM/PM or 24 hour clock display

• Up to 3 Ons/Off s each day

• Built-in, ready-to-use programmes

• Battery back-up

Systems

The FP975 will plug on to the wallplates of
both Danfoss Randall Mk.9 and SET time
controls.

When used on an existing correctly wired
MK.9 wallplate, no wiring changes need to
be made but the small switch on the back
of the new unit should be re-positioned as
shown overleaf.

For SET replacement, no such adjustment
is necessary.

FP975 Heatshare System (mid-position valve) FP975 Heatplan System (2x2 port valves)

Cylinder

‘stat

DHWONDHW

Links

COM

N

N

Room
‘stat

Spring return

DHWONDHW

OFF

Cylinder

‘stat

N

Boiler Pump

N

Mains DHW HTG

922 or 972 OFF COM ON OFF COM ON

SET5 ON COM OFF ON COM OFF

E N L 1 2 3 4 5 6

Part No. 208 Issue 07 10/09

3 Port

Mid Position

Valve

Earth not shown.
Ensure earth continuity
throughout.

Links

HTG

ON

N

N

Room
‘stat

N

Pump

N

N

Boiler

Mains DHW HTG

922 or 972 OFF COM ON OFF COM ON

SET5 ON COM OFF ON COM OFF

E N L 1 2 3 4 5 6

Spring return
valve in DHW

HTG

ON

valve in HTG

HTG

COM

1

Datasheet

FP975 Electronic 7-day Programmer

Specifi cations

Wallplate and Conversion

The FP975 programmer is supplied ex­factory as a 7-day unit.
Simply by re-positioning small switches
as shown, it can become a weekday/
weekend or 24 hour control. The same
switch determines whether or not the
FP975 is HW/CH linked for use with basic
gravity heating systems.

Features FP975 Full Programmer

7-day, 5-day/2-day or 24 hour •

Water/Heating linkable for basic systems •

Output Channels Independent HW and CH

On

Programmes Selectable

Weekdays Saturday & Sunday

6:30am

ON

8:30am

5:00pm

OFF
ON
OFF
ON
OFF

Factory pre-set ON/Off times
All changeable

Ons and Off s per day Up to 3

Advance Override Per channel

+1 Hour Override Per channel

Voltage Rating 220/240 Vac, 50 Hz

Contact Rating 3 (1) A

Switching Action 2 x SPDT Voltage Free

Maximum Ambient Temperature 45°C

Memory back-up Lithium - minimum of 24 hours

Dimensions 150 wide x 99 high x 42 deep

Outline of unit

Allow screwdriver access above unit

12:00pm
12:00pm

10:30pm

Wall or plaster
box tting

O ff

Auto

Allday

(per channel)

7:00am
10:00am
12:00pm
12:00pm

5:00pm

10:30pm

Setting Operating Mode

Four small switches on the rear of the case

are used to set the operating mode.

TOP

7 DAY/24 HR

PUMPED

Terminal block

43mm

MK.9

LEFT

5/2 DAY

SET

GRAVITY

Rear entry cable access

Allow 20mm clearance below unit

Surface xed cable
bottom entry knockouts

ON
OFF
ON
OFF
ON
OFF

24 HR

RIGHT

7 DAY

Wiring

Electronics

C

HTG

N/C

OFF

Please note:
Operating mode switch at factory setting,
ie. for new installation or for direct replacement of SET range.

N/C N/O

3

OFF

C

4 5 6

ON

N

Mains

N/O

L21

ON

DHW

Danfoss can accept no responsibility for possible errors in catalogues, brochures, and other printed material. Danfoss reserves the right to alter its products without notice. This also applies to products already
on order provided that such alterations can be made without subsequent changes being necessary in specifications already agreed.

All trademarks in this material are propert y of the respective companies. Danfoss and the Danfoss logotype are trademarks of Danfoss A/S. All rights reserved.

Danfoss Ltd.

Ampthill Road

Bedford MK42 9ER

Tel: [phone]
Fax: [phone]

Email: [e-mail]
Website: www.heating.danfoss.co.uk

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Part No. 208 Issue 07 10/09 VDAFB212