Specific Applications - Honeywell DT92 Manual

Some parameters require to be set to match specific applications. Recommended settings are shown in the table
below.

Specific Applications

Gas boilers
(<30kW)
Heating
Oil boiler
Thermal actuator
Zone valve
Air
conditionin
g
Heatpump / Air
conditioner
Fan-coil unit
INSTALLER MODE – HOW TO SET PARAMETERS
Each parameter is identified by a 2-letter code, and has a range of values. These are shown in the table below,
followed by instructions on how to enter Installer Mode, how to select a parameter and change its value, and finally
how to exit Installer Mode.
Description
Minimum ON/OFF time
Cycle rate
Proportional band width
Temperature measurement offset
Upper setpoint limit
Lower setpoint limit
Energy saving ECO temperature
(this parameter is only available on
the DT92E model)
Selection of heat/cool changeover
* Off/standby setpoint
** Room temperature sensor use
Failsafe mode (loss of RF
communications)
** Enable HR80 window-open
function
** Enable HR80 local override
Reset parameters
* In cooling mode the off/standby setpoint defaults to OFF
** Only required if system contains HR80 programmable radiator valves
Setting What requires to be changed?
Cycle Minimum
s/ on/off time
hour
6 1 No changes required
3 4 1. Set minimum ON/OFF time to 4 minutes
2. Set cycle rate to 3 cycles/hour
12 1 Set cycle rate to 12 cycles/hour
6 1 No changes required
1. Configure the thermostat to allow switching between
2. Set the thermostat to the required mode of operation
3 4 1. Set minimum ON/OFF time to 4 minutes
2. Set cycle rate to 3 cycles/hour
6 1 No changes required
Parameter
Ot
Cr
Pb
tO
uL
LL
ES
HC
OS
Su
1 = DT92 with HR80, using
2 = DT92 with HR80, using
LC
1 = operate at 20% ON
H0
HL
FS
15
DT92 WIRELESS DIGITAL ROOM THERMOSTAT
heating and cooling modes (set parameter HC = 1)
(heating or cooling) by pressing the ▲ and ▼
buttons together for 3 seconds when in normal run
mode (does not work in off/standby mode).
Range of values
1, 2, 3, 4, 5 minutes
3, 6, 9, 12 cycles/hour
1.5 to 3.0°C
-3 to 3°C
21 to 35°C
5 to 21°C
5 to 35°C
0 = disable
1 = enable
-- = off,
5 to 16°C
0 = DT92 alone
HR80 sensors
DT92 sensor
0 = switch OFF
0 = disable
1 = enable
0 = disable
1 = enable
0, 1
Factory (default) value
1 minute
6
1.5°C
0
35°C
5°C
18°C
0
5°C
0
0
0
1
1 (factory settings)