Danfoss FP735Si Data sheet

Datasheet

FP735Si

Electronic 3-channel Programmer
for Heating and Hot Water with Service Interval Timer

Features

• 24 Hours / 5-2 Day / 7 Day Programming

• Factory Set Clock

• Automatic Summer/Winter Time Change

• Backlit Display

• Holiday Function

• Industry Standard Wallplate

• Optional Service Interval Timer

FP735Si Programmer is a three channel programmer
providing outputs for controlling ON and OFF periods
for room heating and hot water. Each output channel
can operate independently of the others, having its
own separate timing.

FP735Si is fully Part L compliant, and provides a single
unit solution to ful ll the requirements for controlling a
Hot Water zone together with two Room Heating zones.

FP735Si o ers up to six “ON-to-OFF” or “OFF-to- ON”
changes each day. Independently set for each zone.

Programming Modes

Several programming modes are available for selecting
“ON” and “OFF” periods that completely suit the
domestic needs. 7 day mode allows each day to be
programmed individually. 5 day/2 day mode allows
di erent “ON” and “OFF” periods to be set for the
weekend.

Holiday

The FP735Si allows the user to switch o the Hot Water
and the Heating for a programmed holiday period.
When the end of holiday date has been reached, the
Hot Water and Room Heating will return to normal
operation settings.

Info

An information key allows quick viewing of product
model number, software revision number, holiday end
date, and service due date.

Move to Next Event

By a single key press, the user can force the
programmer to immediately move to the next “ON­to-OFF” or “OFF-to-ON” event. Again, this is made
independently for the individual Room Heating or the
Hot Water zone.

+ Hour Override

FP735Si provides the user the ability to override
the running program. By pressing a key the user
can extend a current “ON” time by 1, 2, or 3 hours.
Or switch on the selected channel, when an “OFF”
period is active.

Service Interval Timer

The service interval timer allows the installer to select
a service due date for the boiler, this can be set at
between 28 days and 366 days from the current date.

Service due date is within 28 days

From 28 days prior to the service due date, a visual
warning will appear in the display and a buzzer will
sound for 30 seconds each hour commencing at
midday. This can be cancelled for the current day by
pressing any button.

Service due date is reached or passed

When the service due date is reached the visual and
audible warning are repeated each hour of the day
commencing at midday, but the duration of the alarm
is increased to 60 seconds, this can be cancelled for the
current day by pressing any button.
All override and programming buttons are disabled and
depending upon service interval timer setting, heating
can be restricted to 15, 30 or 45 minutes in each
programmed hour.

Option Service Interval Timer Function

Setting 0 Disable (factory default)

Setting 1 Active, visual and audible warning,

no heat reduction

Setting 2 Active, visual and audible warning,

heat reduced to 45 minutes per hour

Setting 3 Active, visual and audible warning,

heat reduced to 30 minutes per hour

Setting 4 Active, visual and audible warning,

heat reduced to 15 minutes per hour

Setting 5 Active, visual and audible warning,

heat reduced to 0 minutes per hour

Part No. 107v01 11/13

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Datasheet

FP735Si -Electronic 3-channel Full Programmer

Speci cation

Wiring Details

Features FP735Si

Order codes 087N789000

Factory set calendar clock •

Automatic summer/winter time change •

Fully independent Hot Water and Room Heating times •

Room heating and hot water ON/OFF changes up to 6 per day per zone

Selectable 7 day, 5/2 day or 24 hour operating mode •

+1, +2, +3 hour hot water and/or room heating override •

Move to next event •

Holiday mode •

Optional service interval operation •

Power supply 230Vac, 50 Hz

Switching action of output relay 2 x SPDT, 1 x SPST, type 1B

Switch rating of relay contact 3 x 3(1) A, 10-230 Volts

Rated impulse voltage 2.5 kV

Dimensions (mm) 140 wide x 91 high x 28 deep

Ball pressure test 75°C

Temperature range 5-30°C

Design standard EN 60730-2-7

Control pollution situation Degree 2

Memory backup Retained for the life of the product

Time accuracy +/- 1 minute per month

3 ON

HW Zone 3 ON

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 subsequential changes being necessary in specifications already agreed.
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.

2 ON

CH Zone 2 ON

2 OFF

CH Zone 2 OFF

1 ON

CH Zone 1 ON

1 OFF

CH Zone 1 OFF

L

N

Danfoss Ltd.

Ampthill Road
Bedford MK42 9ER
Tel: [phone]
Fax: [phone]
Email: [e-mail]
Website: www.heating.danfoss.co.uk

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