RT520 - FAQs

RT520 - FAQs

RT510 family of devices:

Question: Can I use an app with my RT520 or RF520RF? Will this work with my WIFI? Can I control from my Phone?
Answer: No, the system is not compatible with an app. A replacement system with app control would be required such as the IT700 or IT800 models, Note these systems are not OpenTherm compatible and the RT520 is not wireless.


Question: How do I program my RT520 or RT520RF? How can I change the schedule? How can I get my heating to be on automatically.
Answer: Programming instructions can be found in the user manual and on our website support pages: 
      RT520RF - Setting Program Schedules


Question: Has the RT520 got frost protection?
Answer: While the RT520 family don’t have a dedicated frost mode button, this setting can be achieved as follows.
      - Put the thermostat into manual mode, so the hand symbol is on screen.
      - Then turn the thermostat down to a suitably low temperature, usually 5°, and the stat will maintain that setpoint until changed.


Question: How long will the batteries last?
Answer: We cant say exactly how long as this is dependent on usage. Generally speaking, a good set of Alkaline types would last up to a year.
Its recommended to change them during the heating system annual service.


Question: Will the RT520TX pair with an RXRT510 receiver
Answer: Most RT520TX should pair with this receiver, but it is not fully compatible with all of the features that the RXRT520 receiver has. (OpenTherm)
Question: If I remove the batteries will the clock be reset.
Answer: If you change the batteries within a few minutes the clock and schedule are retained. If you change them in time, don't worry as you can set the date and clock afterwards.


Question: Can I get the manual?


Question: How can I stop the maintenance mode? I have a spanner on screen Thermostat wont work, it askes to call a number
Answer: Service mode is on and can be turned on and off in the Landlord menu, details can be found:  

Question: Will the RT520RF or RT520TX work with my BOILER MODEL ?
Answer: The receiver with the RT520RF system will work with all boilers and includes OpenTherm terminals. COM and NO terminals are volt free but the installer could wire to switch 230Vac, 24Vac or other voltages.


Question: do hand, fire and a half full battery icons on screen mean?
Answer:
      - Hand = manual control, not following schedule
      - Prog (and number) = following the schedule
      - Battery icon = Warning, time to change the batteries soon
      - Flame or snowflake = demand for heat/cool


Question: Do I need to reprogram the thermostat when changing the batteries?
Answer: If the batteries are changed quickly then the thermostat should retain the time and schedules.

Question: Can RT520 be used online, with an app?
Answer: The RT520 is not an internet enabled device. The Salys IT700 would be a modern option for internet control. Its receiver will need to be wired into the heating controls by an electrically competent person.


Question: What is SPAN and TPI control in the RT520?
Answer: Span in thermostats refers to the range of temperature between the setpoint and the point at which the system activates or deactivates, often involving a degree of hysteresis. 
TPI, or Time Proportional Integral control, is a method that allows for more precise temperature control by adjusting the heating or cooling output based on the difference between the current temperature and the desired setpoint over time.


Question: Can RT520 be used for controlling two zones?
Answer: RT520 is a single heating zone only, thermostat controller.


Question: Can the receiver from RT510BC pair with the RT520TX thermostat?
Answer: Not all RT520TX thermostat will pair with RT510BC receivers. We would recommend that the RT520RF system is used, which includes a receiver which needs to be wired in.


Question: How do I remove the landlord features from the RT520, RT520RF or RT520TX?

Answer:
- Tap the Settings (Cog) button - You'll see the warning message, just wait a few seconds until you see Schedule menu
- Then use the arrows to move to Landlord menu and press Tick
- Insert code the PIN code you have set, or 0000 if the PIN was not changed

Once you are in the Landlord menu you can alter the settings

RT520RF - Landlord Settings

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