Table of Contents
Advertisement
Outdoor Reset Control [0-10 Volt Input Control]
• The Outdoor Reset Control feature may be used
to enhance energy efficiency while maintaining
optimal heating performance.
With the Outdoor Reset Control, the heating
temperature setting automatically changes
according to the voltage input from external
controller that is decided by outdoor
temperature.
• Blinking
on the Operation Display is not an
Error Code.
•
is lit on the Operation Display, when the
Combi Boiler receive 1.5 VDC or more and the
Outdoor Reset (Energy Saving) is enabled.
• A signal from external (i.e. building management
system) may be connected to the Combi Boiler to
enable remote control.
This signal should be a 0 -10 volt positive DC
signal. When this input is enabled (1.5 VDC or
more), an external control system can be used to
control the set point temperature of the Combi
Boiler.
• The control interprets the 0-10 volt signal as
follows; when the signal is between 0 and 1.5
volts, the Combi Boiler will be in standby mode,
200
(93)
180
(82)
160
(71)
140
(60)
120
(49)
l:06_HLt
100
(38)
80
(27)
60
(16)
0
1
2
3
4
0 - 10 Volt Input (VDC)
not firing [Blinking
This is not an Error Code.]
When the signal rises above 1.5 volts, the Combi
Boiler will ignite. As the signal continues to rise
towards its maximum of 10 volts, the Combi
Boiler will increase the set point temperature.
• Connect an external control system to the
terminals marked for this purpose on the Combi
Boiler terminal block (refer to page 58). Caution
should be used to ensure that the 0-10 volt
connection does not become connected to
ground.
NOTE • Ensure that the polarity of the
connections from the external
modulating controller to the Combi
Boiler is correct.
Reversed polarity could lead to
erratic and/or no response from
the Combi Boiler controller.
•
system does not supply 1.5 VDC or
more.
5
6
7
on the Operation Display.
will flash if an external control
l:05_HHt
8
9
10
Connecting Electricity
11
57
Advertisement
Table of Contents
