Important notes
The THR842D wireless room thermostat comprises a THR842D Room Thermostat and a Relay Box. These devices communicate on an 868MHz Radio Frequency (RF) band to control a single heating system component such as a boiler, pump or zone valve. RF communication is 2-way, allowing high performance energy efficient control, display of boiler information, and easy setup and communications check features.
Installing the THR842D Room Thermostat
Power up
RF Communication Test
Locating the Room Thermostat
Signal Strength Test
Mounting the Room Thermostat
Test & Binding Flow-chart
Automatic Operation
Temporary Manual Override
Loss of RF communications
To enter Installer Mode
To select a parameter
To change a parameter
To change a parameter
Parameter flowchart
Description | Parameter | Range of values | Default Predefiniti |
Minimum ON/OFF time / | Ot | 1,2,3,4,5 m | 1 m |
Cycle rate / Frecuencia de los ciclos / Nombre de cycles/heure / Aantal schakelingen per uur / Zykluszeit / Frequenza dei cicli / Ciklusidő / Počet cyklů / Częstotliwość cykli / Počet cyklov / Velocidade de ciclo / Frecvență ciclu / Brzina ciklusa | Cr | {3,6,9,12} | 6 |
Proportional band width | Pb | 1.5 … 3.0 K | 1.5K
|
Description | Parameter | Range of values | Default |
Temperature measurement offset | tO | -3 … 3 K | 0 K |
Upper setpoint limit | uL | 21 … 35 °C | 35°C |
Lower setpoint limit | LL | 5 … 21 °C | 5°C |
ECO temperature | ES | 5 … 35 °C | 18 °C |
Heat/cool changeover | HC | 0 / 1 | 0 |
0 = Disable | |||
Off setpoint adjust | OS | — (= Off), 5…16°C | 5°C |
Failsafe mode (loss of RF communications) | LC | 0 = Off 1 = On 20% | 0 = Off |
Reset parameters | FS | 0 / 1 | 1 (factory) |
The binding operation shown is required if:
Reset stored data in Relay Box
Put Relay Box into Binding Mode
Reset stored data in Room Thermostat
Put Room Thermostat into Binding Mode
Bind Room Thermostat to Relay Box
Honey Well
For assistance with this product please visit: livewell.honeywellhome.com
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HONEYWELL THR842D Wireless Room Thermostat Installation Instructions
HONEYWELL THR842D Wireless Room Thermostat Installation Instructions
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