DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS
HeatNet Control V3
Page 100
COMBUST AIR
DAMPER
TYPE
LINKED/
COMMON
LINKED/COMMON
INDEPENDENT
The LINKED/COMMON setting allows one common damper to be
used and controlled by the Master Boiler. All Member boilers must
have their damper prove inputs wired as per Figure 56, Common
system damper wiring, page 82. Also see Section:
Optional
Features: Auxiliary Function Options
INDEPENDENT: Individual
dampers are in controlled by their respective boiler.
IN USE?
YES
YES/NO
If set to YES, then OUTPUT RELAY K5 can be used to control a
combustion air damper. The Master can control a common system
damper or an individual damper. Members control their respective
damper independent of the Master. Relay K5 is used to enable the
combustion air damper. See Figure 56, Common system damper
wiring, page 82. Needs to Prove the damper is open.
INPUT:
J12B.7
DAMPER
The damper prove input is connected at J12B terminals 7 and 8. If
using a common damper refer to the common damper wiring
diagram.
PROOF TIME
2:00
0
– 4 Minutes
This is the proving time in minutes for the combustion air damper
prove switch. It is sensed at J12B Pin 7. If the damper faults, a retry
will occur every 10 minutes in attempt to open the damper.
When using J12B in a common damper configuration, wiring is done
beginning with the Master boiler. J12B Pins 7 & 8 are connected to
the prove switch of the combustion damper. Pin 8 is supplying 24
VAC and pin 7 is the sense input. A second wire is connected to
J12B pin 7 of the Master and the other end connected to the first
member boilers J12B pin 7. If another member boiler is present,
connect another wire to the J12B Pin 7 terminal of the first member
and the other end to the second member boiler J12B pin 7. Continue
this method for each additional boiler.
RUN IN LOCAL IF:
H-NET
COMMUNICATIONS
LOST
OFF
ON/OFF
If this entry is set to ON and the Member boiler does not see any
communications coming from the Master boiler, this boiler will run
in LOCAL. The boiler will continue to run in LOCAL until
communications are re-established or this entry is set to OFF.
LOW TEMPERATURE
SENSOR
NONE
SUPPLY, HEADER,
RETURN, NONE
This entry may be set to one of the temperature sensors: SUPPLY,
HEADER, RETURN, or turned OFF (default). If this entry is set to a
sensor and the temperature falls below TEMP, the boiler will
automatically start and run the water temperature up to the LOCAL
Setpoint and then shut OFF.
TEMP < 40F
40
F
35-200
°
F
This is the temperature that the selected sensor must fall below for
the boiler to start.
