Secure SRT321 / Horstmann HRT4-ZW switching problem

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1

I have this thermostat together with receiver. The thermostat is included in Z-wave network and associated with receiver. I am using the driver by Scruffy-SJB. The receiver is not included in the Z-wave network (should it be?).
The problem that I have is that the thermostat is all the time sending on/off signals to the receiver. I have a pellet furnace that takes around 20min to turn on and 5min to turn off, so the best way is to run it constantly until the temperature is reached. I have set DIL switches 7 and 8 to OFF so that there should not be any cycling.

I have taken a look at the driver's code, but I don't understand where this could be fixed. Initially I thought that this could be solved by adjusting code regarding OperatingState, but after looking at debug info it seems that the modes are the ones that control the on/off function. In the debug log bellow you can see that thermostat turns off before the temperature is reached (why?), and operating state remains "heating".

dev:2092023-12-06 18:09:16.385debugThermostat SRT321 up to temp - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90
dev:2092023-12-06 18:01:41.354debugThermostat SRT321 called for heat - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90
dev:2092023-12-06 17:59:22.357debugThermostat SRT321 up to temp - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90
dev:2092023-12-06 17:51:41.309debugThermostat SRT321 called for heat - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is auto - Operating State is heating - Battery is 90
dev:2092023-12-06 17:49:18.298debugThermostat SRT321 up to temp - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90
dev:2092023-12-06 17:41:41.267debugThermostat SRT321 called for heat - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is auto - Operating State is heating - Battery is 90
dev:2092023-12-06 17:39:23.318debugThermostat SRT321 up to temp - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90
dev:2092023-12-06 17:31:41.220debugThermostat SRT321 called for heat - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is auto - Operating State is heating - Battery is 90
dev:2092023-12-06 17:29:17.269debugThermostat SRT321 up to temp - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90
dev:2092023-12-06 17:21:41.178debugThermostat SRT321 called for heat - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is auto - Operating State is heating - Battery is 90
dev:2092023-12-06 17:19:20.176debugThermostat SRT321 up to temp - Current Temperature is 7.6 - Setpoint is 8.0 - Mode is heat - Operating State is heating - Battery is 90

I would be grateful for any tips of how to solve it.

2

Actually, it does look a lot like cycling. The manual is not very clear, but it might be that DIL switches 7 and 8 in OFF position is the "Default" position and that translates to 6 cycles per hour (or every 10 minutes). I will reach out to them to know for sure.

3

I have not received any answer from the Secure about this, but I have solved the problem by adjusting settings in the furnace. When the thermostat gives ON signal the furnace turns on instantly, but when there is OFF signal, it will turn the furnace off only if it is unchanged for 15min. If there is cycling that happens every 10min, it does not turn the furnace off.

4

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