marmony MTC-40 Radio Controlled Room Thermostat Instruction Manual

Marmony MTC-40 Radio Manual: Questions and Answers

Marmony MTC-40 Radio specifications

Full specifications, page 23

What does each LED color on the Marmony MTC-40 receiver indicate?

Red means ready for operation with heating off. Green means heating operation is on.

Instruction Manual, p. 11

Can I use the Marmony MTC-40 Radio receiver without the thermostat transmitter turned on?

No. If operating the receiver without the thermostat, you must switch off the transmitter display fully by pressing its ON / OFF button for three seconds until it shuts down. Instruction Manual, p. 11

What does the suitcase symbol mean on the Marmony MTC-40 Radio display?

The suitcase symbol indicates that holiday mode is active or ready to be activated. Instruction Manual, p. 20

What do the plus and minus buttons do on the Marmony MTC-40?

They select values during setup and adjust the target temperature manually in active AUTO mode. Instruction Manual, p. 20

What does the frost symbol illuminated on the Marmony MTC-40 Radio indicate?

Room temperature has dropped below 3 °C in OFF mode, triggering automatic frost protection to switch on heating. Instruction Manual, p. 22

How often does the Marmony MTC-40 Radio thermostat communicate with the receiver?

A connection is established between the thermostat and the receiver approximately every 15-30 seconds depending on the mode to save battery. Instruction Manual, p. 17

How can I tell the Marmony MTC-40 Radio heating is on in manual mode?

The flame symbol illuminates in the symbol row when heating mode is switched on, and the receiver LED turns green. Instruction Manual, p. 17

How do I set up the date and time on the Marmony MTC-40?

After inserting batteries, press SET / OK for 3 seconds. The year flashes first.

1. Adjust the year with + or - button, then press SET / OK to confirm
2. Adjust the month with + or - button, then press SET / OK to confirm
3. Adjust the day with + or - button, then press SET / OK to confirm
4. Adjust the hour with + or - button, then press SET / OK to confirm
5. Adjust the minute with + or - button, then press SET / OK to confirm. The display now shows 1.0 °C and CONST. is illuminated
6. Wait 15 seconds for the display to turn off. Your settings are saved Instruction Manual, p. 13

Why does my Marmony MTC-40 Radio display show OPEN and the heater won't turn on?

The open window function detected a rapid temperature drop, which triggers frost protection.

• A temperature drop of about 2 °C within 5 minutes activates this function
• Close the window if it's open. The thermostat resumes heating once the room temperature rises
• If the window stays closed, heating automatically restarts after 30 minutes to prevent frost damage
• This function is active by factory setting for marmony infrared heaters Instruction Manual, p. 14

What does the hysteresis setting do on the Marmony MTC-40 Radio?

Hysteresis is the temperature difference below the target before the thermostat restarts heating. The factory preset is 1.0 °C and should not be changed for marmony infrared heaters.

• Example: target 20 °C with 1.0 °C hysteresis turns the heater off at 20 °C and back on at 19 °C
• You can adjust the value from 1 °C to 5 °C using the plus and minus buttons during setup
• The recommended setting for marmony infrared heaters is 1.0 °C Instruction Manual, p. 13

How long does it take for the Marmony MTC-40 to turn off the display after setup?

15 seconds. After you confirm the final setting during date and time entry, the display automatically switches off and saves your data. Instruction Manual, p. 13

Marmony MTC-40 Radio compared with other room thermostats