DEFAULT SETTINGS & MENU ITEM DESCRIPTIONS
HeatNet Control V3
Page 108
This algorithm looks at the size of the band and at what rate the
temperature is falling. It then calculates when to start the boiler
(knowing its starting time) to ensure the boiler starts within the band.
Once the boiler starts, the Add Boiler Delay time starts and
continues to expire in and below the band. This ensures that another
boiler does not start when it leaves the bottom of the band.
MIXED BOILERS TAB
START PRIORITY SET
WHEN
ALWAYS FIRST
ALWAYS FIRST,
OUTSIDE AIR IS
ABOVE, RETURN IS
BELOW
STOP PRIORITY SET
WHEN
ALWAYS LAST
ALWAYSLAST,
OUTSIDE AIR IS
BELOW, RETURN
IS ABOVE
BOILERS:
0
0 - 1
This setting works in conjunction with the ADVANCED SETUP:
SYSTEM: OPTION setting BASE LOAD. Currently only (1) base
load boiler is supported using relay K8
START WHEN
MODULATION
IS ABOVE
MODULATION IS
ABOVE, OUTSIDE
AIR IS BELOW,
RETURN IS ABOVE
Used in Conjunction with DELAY TIME.
MODULATION IS
ABOVE
95%
0
–100 %
The base load relay K8 will close when the Modulation is >%.
OUTSIDE AIR IS
BELOW
15 °F
-40
– 130 °F
The base load relay K8 will close when the OA temp is > T
RETURN IS ABOVE
60
– 150 °F
The base load relay K8 will close when the Return temp is > T.
STOP
ALWAYS FIRST
ALWAYS FIRST,
MODULATION IS
BELOW, OUTSIDE
AIR IS ABOVE,
RETURN IS BELOW
MODULATION IS
BELOW
40%
0
– 100 %
The base load relay K8 will open when the Modulation is <%.
OUTSIDE AIR IS
ABOVE
25 °F
40
–130 °F
The base load relay K8 will open when the OA temp is > T.
RETURN IS BELOW
150 °F
25
–210 °F
The base load relay K8 will open when the Return temp is < T.
DELAY TIME
0
0
– 60 Minutes
This setting allows a wait time before firing the base load boiler
once the start condition is met.
Sensors can only be changed when there is no call for heat. The boiler must be in STANDBY.
