1. Ifihan
This manual provides detailed instructions for the installation, operation, and maintenance of the Marley T200 Qmark Electric Line Voltage Wall Thermostat. The T200 is a wall-mounted, double-pole, heating-only thermostat designed for precise control of electric heating systems. It features a built-in heat anticipator for consistent temperature regulation and a snap-action design for extended operational life. Please read this manual thoroughly before installation and use.
2. Alaye Aabo
IKILO: Risk of electric shock. This device operates on line voltage (277 Volts). Improper installation or handling can result in serious injury or death. Always turn off power at the main service panel before installing or servicing this thermostat.
- Fifi sori gbọdọ jẹ ṣiṣe nipasẹ onisẹ ina mọnamọna ni ibamu pẹlu gbogbo awọn koodu itanna agbegbe ati ti orilẹ-ede.
- Má ṣe fi sori ẹrọ ni awọn ibi ti o le jẹ ki omi tabi ọriniinitutu pọ si.
- Rii daju pe gbogbo awọn asopọ onirin wa ni aabo ati ti ya sọtọ daradara.
- Maa ko koja volum pàtótage or current ratings of the thermostat.
3. Package Awọn akoonu
Daju pe gbogbo awọn paati wa ṣaaju ki o to bẹrẹ fifi sori:
- Marley T200 Line Voltage Wall Thermostat
- Àwọn skru ìfìsókòó (tí a sábà máa ń fi kún un)
- Ilana Afowoyi (iwe yii)
4. fifi sori
The Marley T200 thermostat is designed for wall-mount installation. Ensure the power supply to the heating system is disconnected at the circuit breaker before proceeding.
4.1 Onirin
The T200 thermostat requires a 277 Volt power supply. It features three pre-stripped wires for connection:
- Connect the two red wires to the incoming 277V line voltage ipese.
- Connect the black wire to the heating load (e.g., electric heater).
- Ensure all connections are made using appropriate wire nuts or connectors and are securely tightened.
Refer to the diagram below for visual guidance on the thermostat's wiring and components.

Nọmba 1: The Marley T200 thermostat showing its off-white rectangular body, a brass-colored temperature dial with markings from 50 to 90 degrees Fahrenheit and an 'OFF' position, and three exposed electrical wires (two red, one black) extending from the left side for connection to the line voltage and heating load. The 'MARLEY' brand name is visible at the bottom front.
4.2 Iṣagbesori
After wiring, carefully push the thermostat into the wall box. Secure the thermostat to the wall box using the provided mounting screws. Ensure the thermostat is flush with the wall surface.
5. Awọn ilana Iṣiṣẹ
The Marley T200 thermostat features a simple manual control dial for setting the desired temperature.
- Atunṣe iwọn otutu: Rotate the central dial clockwise to increase the desired temperature or counter-clockwise to decrease it. The temperature range is from 50°F to 90°F.
- PA Ipò: To turn off the heating system, rotate the dial counter-clockwise until it reaches the 'OFF' position. This will completely disconnect power to the heating load.
- The built-in heat anticipator helps maintain a consistent room temperature by cycling the heating system more frequently for shorter durations, preventing wide temperature swings.
6. Itọju
The Marley T200 thermostat requires minimal maintenance.
- Ninu: Periodically wipe the exterior of the thermostat with a soft, dry cloth to remove dust. Do not use abrasive cleaners or solvents.
- Ko si Awọn apakan Iṣẹ Olumulo: Ko si awọn ẹya ti o le ṣe iṣẹ olumulo ninu thermostat. Ma ṣe gbiyanju lati ṣii tabi tun ẹrọ naa ṣe.
7. Laasigbotitusita
If you experience issues with your Marley T200 thermostat, consider the following:
- Ko si ooru:
- Check if the thermostat dial is set to the 'OFF' position.
- Ensure the circuit breaker for the heating system is not tripped.
- Verify that the thermostat is properly wired and all connections are secure (consult a qualified electrician if unsure).
- Iwọn otutu ti ko ni ibamu:
- Rí i dájú pé thermostat náà kò sí nítòsí àwọn orísun ooru (fún àpẹẹrẹ, oòrùn tààrà, lamps) or drafts, which can affect its accuracy.
- The thermostat has a differential of 2.5 degrees, meaning it will cycle the heat within a 2.5-degree range of the set point.
For persistent issues, contact a qualified electrician or Marley customer support.
8. Awọn pato
| Brand | Marley |
| Orukọ awoṣe | T200 |
| Voltage | 277 Volts |
| Iwọn otutu | 50°F - 90°F |
| Iyatọ | 2.5°F |
| Iṣakoso Iru | Manual (Dial) |
| Iṣagbesori Iru | Ògiri Ògiri |
| Ohun elo | Ṣiṣu, Ejò |
| Ọja Mefa | 2.5 x 3.13 x 4.5 inches |
| Iwọn Nkan | 8.8 iwon |
| Orisun agbara | Okun Itanna |
9. Atilẹyin ọja ati Support
Specific warranty information for the Marley T200 thermostat is not provided in this document. For details regarding warranty coverage, technical support, or replacement parts, please contact Marley customer service directly or refer to the official Marley webojula. Tọju iwe-ẹri rira rẹ bi ẹri rira.





