RXRBTI - Uncategorized DIMPLEX - Free user manual and instructions

Product Type	Runback Timer (Accessory)
Brand	Dimplex
Model	RXRBTI
Compatibility	Dimplex heaters with right-side slide-in compartment
Runback Period Range	30 minutes to 4 hours (30-minute steps)
Timer Functions	Standard (run then off) or Special (Comfort → Setback 24h → Frost)
Dip Switches	4 switches for period and mode selection
Neon Indicator	Lights when timer is active (standard) or in Comfort mode (special)
Power Supply	Via heater mains (230V AC, 50Hz)
Installation	Plug into heater compartment, secure with screw
Safety	Screw lock prevents removal from heater
Operating Modes	Comfort (user temp), Setback (5°C below user temp), Frost (<5°C)
Temperature Control	Managed by heater thermostat; timer only controls duration
Dimensions	Approx. 60 x 40 x 25 mm (plug-in module)
Weight	Approx. 50 g

Frequently Asked Questions - RXRBTI DIMPLEX

How do I set the desired runback period on the timer?

Adjust dip switches 2, 3, and 4 on the back of the timer according to Table 1 (standard) or Table 2 (special). Switch 1 selects the function: down (↓) for standard, up (↑) for special. Periods are in 30-minute steps from 30 minutes to 4 hours.

How do I start the runback timer?

After installing the timer and powering the heater on, press the button on top of the timer. The neon light will illuminate, and the heater runs for the set period then turns off (standard mode) or transitions to Setback (special mode).

How do I stop the timer before the runback period ends?

Press the button on top of the timer again. The neon light will turn off, and the heater will stop heating (standard mode) or switch to Frost mode (special mode).

What is the difference between standard and special function?

In standard mode, the heater runs for the set period then turns off. In special mode, it runs in Comfort (user set temp) for the set period, then automatically switches to Setback (5°C below user temp) for 24 hours, then to Frost mode indefinitely.

How can I manually select Setback or Frost mode?

From Comfort mode, press the button once to enter Setback for 24 hours. Press it again (or press once from Setback) to enter Frost mode indefinitely.

What does the neon light on the timer indicate?

In standard mode, the light is on when the timer is active (heating). In special mode, the light is on only during the Comfort run; it turns off during Setback and Frost.

How do I install the runback timer in the heater?

Switch the heater off, remove the plug-in protective cover from the right side of the thermostat unit at the back of the heater. Remove the timer from its box, set the dip switches, and plug the timer into the exposed slot. Finally, secure with the supplied screw through the hole at the rear of the timer enclosure.

Can the timer be removed from the heater?

Yes, but the screw lock prevents easy removal. To remove it, first take the heater off the wall (if wall-mounted), then unscrew the lock screw and slide out the timer.

What are the dip switch settings for a 2-hour runback period in standard mode?

For standard mode (Switch 1: ↓), set Switches 2, 3, and 4 as: ↓ ↑ ↑ (refer to Table 1, row for '2 hours'). For special mode (Switch 1: ↑), set them as: ↑ ↓ ↓ (Table 2, row for '2 hours').

What is the Frost mode temperature threshold?

Frost mode activates when the ambient temperature drops below 5°C. The heater will then turn on regardless of the user set temperature to prevent freezing.

USER MANUAL RXRBTI DIMPLEX

RXTIRB - Runback Timer

TIDN60R001 Issue 0

IMPORTANT: THESE INSTRUCTIONS SHOULD BE READ CAREFULLY AND RETAINED FOR FUTURE REFERENCE

Installation

Switch the heater off and remove the plug-in protective cover from the right hand side of the thermostat unit at the back of the heater. Remove the Runback timer from its box, set the required runback period as detailed below and plug the timer into the slide in compartment now exposed. Switch the heater on at the mains supply.

Note: In order to prevent the timer being removed from the heater, fit the supplied screw to hole at rear of timer enclosure after the timer has been inserted. The heater needs to be removed from the wall for this operation - see Fig. 1.

This locks the timer to the heater body.

Fig. 1

Setting the Standard Runback Timer Function

The runback timer can be set for a run period from 30 minutes to 4 hours (30-minute steps only). To set the runback period on the timer, adjust the dip switches located at the back of the timer - see Fig. 2.

Fig. 2

To set the desired runback period switches 2, 3 and 4 have to be set either up or down according to Table 1. Switch 1 should always be left down (↓) to run the standard runback timer function.

Table 1

1 2 3 4 Runback			Period
↓	↓	↓	↓	12 hour
↓	↓	↓	↑	1 hour
↓	↓	↑	↓	112 hours
↓	↓	↑	↑	2 hours
↓	↑	↓	↓	212 hours
↓	↑	↓	↑	3 hours
↓	↑	↑	↓	312 hours
↓	↑	↑	↑	4 hours

Starting theTimer

Once the unit has been inserted into the heater and the heater is powered on, to start the runback timer the button at the top of the plug in timer must be pressed. Once pressed, the runback timer will switch on (the neon light on runback timer will go on) for the runback period set previously.

Stopping the Timer

To cancel the runback timer press the button at the top of the timer. Once pressed the runback timer will turn the heating off and the neon light will switch off.

Runback Timer's special function

The special function runs in COMFORT mode for the runback period selected. It then switches automatically to SETBACK for 24hrs, after which it switches to FROST mode indefinitely.

When in COMFORT mode the heater operates at the user selected temperature.

When in SETBACK mode the heater operates at 5°C below the user selected temperature.

When in FROST mode the heater only switches on when the ambient temperature of the heater is below 5^ C, independent of user selected temperature.

Setting the Runback Timer in Special function mode

Set switch 1 to the up (↑) position. Set the desired period by setting the switches 2, 3 and 4 either up or down according to Table 2.

Table 2

1 2	3 4 Runback	Period
↑		↓	↓	↓	12 hour
↑		↓	↓	↑	1 hour
↑		↓	↑	↓	112 hours
↑		↓	↑	↑	2 hours
↑		↑	↓	↓	212 hours
↑		↑	↓	↑	3 hours
↑		↑	↑	↓	312 hours
↑		↑	↑	↑	4 hours

Once the period has been set, the unit is plugged into the heater and mains is switched on, the runback timer functions as follows:

1. On initial power ON the runback timer causes the heater to be permanently in FROST mode, the default setting, Runback timer neon light is off.

2. The runback timer button, once pressed causes the heater to run the COMFORT setting (light on), for the set runback period selected. It then switches automatically to SETBACK for 24hrs (light off), after which it switches to FROST mode indefinitely.

Manually Selecting Setback and Frost modes

The SETBACK mode can be selected manually by pressing the button on the top of the timer while the heater is in COMFORT mode, the setback mode then operates for it's 24 hour period after which it will switch automatically to FROST mode. The FROST mode can be selected manually by pressing the button on the top of the timer twice when the heater is in COMFORT mode (or once when it is in SETBACK mode), heater will remain in FROST mode.