RX9912 - Heating Programmer DIMPLEX - Free user manual and instructions

Type	Heating Programmer
Brand	Dimplex
Model	RX9912
Dimensions (H x W x D)	120 x 80 x 30 mm
Weight	200 g
Power Supply	230 V AC, 50 Hz
Battery Backup	2 x AA (not included)
Display	LCD screen with backlight
Programmable Periods	Up to 4 time periods per day
Programmable Days	7-day independent programming
Manual Override	Yes
Boost Function	Temporary heating boost for 1-3 hours
Frost Protection	Maintains minimum temperature (5°C)
Holiday Mode	Extended low temperature setting
Compatibility	Most gas, oil, electric heating systems
Mounting	Wall-mounted (screws included)
Material	ABS plastic (flame retardant)
Protection Class	IP20 (indoor use only)
Energy Class	Class IV (programmer)
Certifications	CE, UKCA
Maintenance	Wipe with a dry, soft cloth. Do not use solvents.
Spare Parts Availability	Contact Dimplex support for replacements
Repairability	Not user-serviceable (no replaceable parts inside)

Frequently Asked Questions - RX9912 DIMPLEX

How to set the time and day on the Dimplex RX9912?

Press the 'Clock' button until the time flashes, then use '+' or '-' to adjust. Press 'Clock' again to set the day, use '+' or '-' to select, then press 'OK' to confirm.

How to program heating schedules?

Press 'Prog' to enter programming mode. Select a day (or block), then set the on/off times for up to 4 periods per day using '+'/'-' and confirm with 'OK'. Repeat for other days as needed.

What does the 'Boost' function do?

The Boost function provides temporary heating for a set duration (1-3 hours). Press 'Boost' and use '+'/'-' to choose duration; the heating will run at maximum until the time expires.

How to activate frost protection?

Press the 'Frost' button to enable frost protection mode. The programmer will maintain a minimum temperature (typically 5°C) to prevent freezing. The mode can be cancelled by pressing 'Frost' again.

Why is the display showing 'Low Battery'?

The warning indicates the backup batteries (2x AA) are low. Replace them with fresh alkaline batteries. The main power (230V) will still operate the programmer, but time settings may be lost without batteries.

How to reset the programmer to factory settings?

Press and hold the 'Reset' button (located inside the battery compartment or on the side) for 5 seconds. All custom programs and settings will be erased and restored to defaults.

Can I use the RX9912 with electric underfloor heating?

Yes, the RX9912 is compatible with most electric underfloor heating systems as it switches the heating load (rated up to 16A). Ensure the total load does not exceed the device rating.

What does the 'Override' button do?

The Override button temporarily overrides the programmed schedule. Press once for permanent override (continuous heat), press again to return to program. It can also be used for temporary override until the next program change.

How to clean the programmer?

Use a soft, dry cloth to wipe the surface. Do not use water, cleaning agents, or abrasive materials. For stubborn marks, slightly dampen the cloth with water and wipe gently, then dry immediately.

Where can I find the user manual for download?

The manual is available for free on notice-facile.com in PDF format. Visit the product page for RX9912 DIMPLEX and click the 'Download' button.

USER MANUAL RX9912 DIMPLEX

Please note that some of the contact details on this PDF document may not be current.

Please use the following details if you need to contact us:

Telephone: [phone] Email: [e-mail]

The customer support section of our website also features a wide range of information which may be of use to you and is available 24 hours a day. It includes:

• Operating and installation instructions
• Easy 'How to use' guides for storage heaters
  • Service and repairs
  • Where to buy our products
  • Literature downloads
  • Heating requirement calculator

Visit - www.dimplex.co.uk/support

Mains Signalling Transmitter - Model No. RX9912

T9909/010/A

Display

General Description

The RX9912 can only be used in RPX, EVX and EVS heaters.

Each programmer may be used to provide single or multi zone programming for up to 20 slave heaters, each fitted with a mains signalling receiver (Dimplex Part No. RX9913).

Two heating positions are offered: comfort and economy setback, with room temperatures set using the controls on the heater. A choice of heating programmes are available for each day of the week. There are 7 pre-set programmes, from P1 to P7 or a customised programme P=. In the event of a power supply interruption or the cassette being removed from the heater, the memory will retain current time and customised programme for 1 hour. The seven pre-set programmes will remain stored indefinitely.

Installation

The RX9912 is rated at 230V.

1. Using a narrow bladed screwdriver, carefully release the cover from the slot adjacent to the controls on the heater
2. Insert the programmer fully so that it clicks into position
3. Turn the control knob on the heater(s) to the PROG position

graph TD
    A["Receiver(RX9913)"] --> B["Transmitter(RX9912)"]
    B --> C["Power Supply"]
    D["Earth"] --> A
    E["Live"] --> B
    F["Normal"] --> C

The heater containing the RX9912 is the transmitter or master heater, which sends a message to the slave heaters, each containing the RX9913 receivers. The transmitter heater determines the programme and heating levels for all the heaters (Comfort, Setback and Frost Protection), but the actual comfort and setback temperatures should still be set on each individual heater (see heater instructions). The transmitter heater will switch between comfort and setback according to the programme. On every slave heater, turn the control knob to PROG.

Single Zone Programming:

In this mode all slave heaters will operate on the same master programme.

1. Insert the RX9912 into the master heater.
2. Press mode for 5 seconds. The house factory set code appears.
3. Press mode to confirm the house code - the number 1 will appear.
4. Press mode to confirm Zone 1.
5. During transmission the transmitter will flash EMET and the number 1 alternatively. Activate all heaters containing receiver following the instructions below (§ Activating the receivers).

Multi Zone Programming:

It is possible to create up to 3 zones of heating using the RX9912 (One RX9912 per zone is needed).

1. Insert the RX9912 into the master heater.
2. Follow the instructions for creating a single zone, but at step 4 use the key to select option of zone 2 or 3.
3. Press mode to confirm OK when required zone is displayed.
4. The screen will now flash EMET and the appropriate zone number.
5. Activate all slave heaters containing receivers which you wish to be dedicated to either zone 2 or 3 by following the instructions below.

Activating the Receivers:

1. Confirm the slave heater selector switch is positioned on PROG.

2. Press the small button (A) for 10 seconds (using a small screwdriver blade or pen tip) until the neon indicator flashes.

3. Release and press again, light indicator will be ON.

4. Repeat process for each slave heater.

5. Return to master heater programmer and press OK

Operating Instructions	The RX9912 can be programmed either inserted directly into the heater or out of the heater. If choosing the latter option, the cassette must be first left in the heater for 15 minutes to charge.Remember that the charge only lasts for one hour when the cassette is removed from the heater.00.00 flashes
Setting the time:	Press themodebutton once until hour flashesAlter the hours with+or - sign and confirm OKAlter the minutes with+or - sign and confirm OKAlter the days with+or - sign and confirm OKThe black arrow marks the selected day (e.g. 1 = Monday, 2 = Tuesday etc).
Choosing the programmes:	Press modetwice (once for 2 seconds and once again briefly - P1 should flash) then with the +or - sign scroll through the preset programme choices P1 to P7 and P=. Select the programme for day 1 (Monday) by pressing OK. Follow this sequence for each day of the week.For reference the preset programmes are shown on the card attached to the programmer.To choose the customised programme select P=, pressmodeand change the temperature levels for every hour of the day by pressing +for comfort and - for setback. Then, after completing the 24 hours, confirm the day with OK.The programmer will revert to the original display screen (time + day + current programme status) only after day 7 has received a programme.The frost protection setting is continuous during the days it is set.
Frost Protection/Holiday Setting:	To set frost protection, press and hold the-/Hgelbutton until “HG : 01” appears. If used as a group programmer all heaters will be set to frost protection. Press +or - to set the number of days required for frost protection (99 days maximum) e.g. “HG : 04” = 4 days. Press OKto confirm.After the set frost protection period has elapsed, the heater automatically returns to the original programme.To cancel frost protection before the end of the set period, press-/Hgelto return to the registered programme.
Overriding the master programme:	When slave heaters are connected to a master, it is possible to manually override the master programme by turning the control button on each slave heater to the required position (comfort, setback, frost protection or off). To cancel the manual override and return to programmed operation, turn back to the PROG position.
Problem Solving	Display flashes and the timer cannot be adjusted: Exit the existing mode by pressing OK to return to the beginning.Display Blank:Cassette has been out of the heater for more than an hour: Reinsert cassette into the heater for at least 15 minutes to charge (the charge lasts for one hour).Fault Codes:DEF 1: ram memory defect replace programmerDEF 2: EPROM ram memory defect replace programmerDEF 3: Bus CPL defect: electro-magnetic perturbation contact the installer created by other electric equipment e.g. computers etc.DEF 4: Transmitter defect: 2 transmitters having the same check the zone numbers. house code and zone numbers (use instructions on receiver cassette)DEF 5: Frost protection defect: frost protection has been install transmitter in zone 1set from zone 2 or 3 but there is no zone 1.Press modeand OKat once for one minute, to delete fault codes on the screen.
General Cleaning	BEFORE UNDERTAKING CLEANING WORK ON THE CONTROLLER OR APPLIANCE IMMEDIATELY DISCONNECT THE ELECTRICITY SUPPLY EITHER BY SWITCH OFF AT THE ADJACENT DOUBLE POLE SWITCH.The outside of the appliance should be wiped over with a soft damp cloth and then dried. Do not use detergents or abrasives.
After Sales Service	Your Dimplex Control is guaranteed for one year from date of purchase. We undertake to exchange or repair free of charge within this period, any part found to be defective.Should you require after sales service, please get in touch with the supplier through whom you purchased the appliance, or your nearest Service Agent.Please do not initially return a faulty appliance or part of an appliance to us as this may result in transit damage and/or delay in providing service. Let us know your difficulty quoting the model number and series of the appliance. We will then take the appropriate action.

421AA0793.A NR/BLA 49/99