SCREEN DESCRIPTIONS
HeatNet Control V3
Page 90
Running
The boiler is running and heating water. The Main Valve is open or this is the called for % of
input.
Running 100%
The boiler is calling to run at 100% modulation.
Shorted ***
Sensor
The *** indicates the temperature sensor which has shorted. *** Sensors are: Outside, Supply,
Return, Header, DHW, Stack, and System Return.
Stack Temperature
is High
If a 1k ohm platinum stack sensor is used, this message will be displayed . Caused by poor heat
transfer in the exchanger.
Standby
The boiler has no call for heat. There is no Heat Demand Input.
Supply Water
Temperature has
Exceeded its High
Limit Setting
The Mechanical High Limit on the Boiler has tripped. The high limit interlock breaks power to
the ignition control and effectively removes any chance of the gas valve receiving power. The
HeatNet series control remains powered to record and display the fault.. The interlock is
located on J5, HIGH LIMIT. Ensure power is present on the input to the High Limit Control.
Supply Water
Temperature has
Exceeded the
Operating Limit
When the supply water temperature exceeds the top of the Operating Limit Band and the
Operating Limit. This is the Yellow Band portion of the temperature bar on the Home Screen.
Supply Water
Temperature has
Exceeded the Stat
Operating Limit
The system is in a heating mode, but none of the Displays when a mechanical thermostat input
is used and connected to EXT OPER J11B.3 &J11B.4 and opens.
User Interlock
This may be used as a custom interlock input on J11B.1 & J11B.2, but is currently used on Torus
boilers as a float switch at the bottome of the heat exchanger.
Shutdown Test
If the boiler runs continuously for a 24 hour period, the boiler will be cycled off and restarted
