Honeywell ST9420C User Manual

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CONFIGURATION & SERVICE DATA
Configuration Data (to be completed by Installer)
The tables below are for the Installer to complete to indicate how your ST9420C and
DT92E have been configured.
Application
Insert application number as per Installation wiring diagrams:
Configurable Features Options Factory
setting
Installer configured
(tick box or note value)
ST9420C Configuration - standard
24hr or am/pm clock
display.
am/pm display
24hr display
Display backlight operation. Off
on if button pressed
on continuously
Automatic time change. disabled,
enabled
1-day or 5/2-day or 7-day
operation.
1-day operation
5/2-day operation
7-day operation
Number of ON/OFFs per
day.
2 on/offs per day,
3 on/offs per day
Default time programme. A = standard
b = at home
C = economy
Hot water set temperature From 40 to 85°C 60°C
Optimum start no optimum start
delayed start
optimum start on
Optimum start limit 1 hour
2 hours
3 hours
Optimum stop disabled
enabled
Frost protection temperature From 5 to 16°C 5°C
Minimum ON/OFF time 1, 2, 3, 4, 5 minutes 1 minute
Cycle rate 3, 6, 9, 12 cycles
per hour
6 cycles
Proportional band width From 1.5 to 3.0°C 1.5°C
Failsafe mode (loss of RF
communications)
off
on 20%

Honeywell ST9420C Specifications

General

Model	ST9420C
Category	Thermostat
Display	LCD
Channels	2
Power Supply	230V AC
Mounting	Wall-mounted
Contact Voltage	230V AC
Contact Current	3A resistive, 1A inductive
Switching Type	SPDT
Type	Programmer
Programs	7-day programming
Compatibility	Compatible with most heating systems