SCREEN DESCRIPTIONS
HeatNet Control V3
Page 89
Input is Reduced
due to Stack
Temperature
If a stack sensor is used and temp exceeds limits.
Minimum off Time
is Active
The Minimum Off Time has been set on the boiler. During this time the boiler has taken itself
offline from the Master.
Multiple out of
Sequence
Interlocks Fault
The HeatNet control has detected an interlock fault and is trying to resolve the source. A wait
period is in effect.
New Boiler
Starting, Reducing
Input
In a HeatNet system with the Adaptive Modulation selected, the boiler will reduce input on
currently running boilers when starting a newly added boiler. This is to minimize adding too
many BTUs delivered to the system.
No Local Flow
Interlock LOCAL WATER FLOW on J11B.5 & J11B.6. Once the HeatNet series boiler receives
waits 10 seconds or more (adjustable) to prove flow. If there is no flow, the flow switch alarm
will be set. Every 10 minutes the circulator pump relay will cycle ON for 10 seconds and then
OFF for 10 seconds to try and establish flow..
No System Flow
The SYSTEM WTR FLOW interlock is open. J11A.1 & J11A.2. Once the HeatNet series boiler
receives a call for heat, it closes the system circulator pump relay. It then waits 10 seconds or
more to prove flow. If there is no flow, the flow switch alarm will be set. Every 10 minutes the
circulator pump relay will cycle ON and then OFF for 10 seconds to try and establish flow.
Number of Boilers
Limited due to
Insufficient Flow
The GPM measured through a system flow meter, writing the GPM through communications
port, or writing the # of boilers that can run does not meet flow requirements.
OPEN *** Sensor
The *** indicates the temperature sensor which opened. Sensors are: Outside, Supply, Return,
Header, DHW, Stack, and System Return.
Pre-Purge
The Blower is exchanging the air in the combustion chamber per the Ignition control’s pre
-
purge time.
Ignition
The boiler is at it’s ignition phase in attempting to light the burner.
Post Purge
A post purge of the blower is in effect.
Return
Temperature is
Low
Displayed when the Return Temperature may cause condensing (mainly in non-condensing
boilers).
