Camus Hydronics Valiant-FT II Series, Инструкция по установке и обслуживанию

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6.2 Lead Lag Setup
All SOLA controllers are programmed with a default
adress of 1. The address of the slave controllers in the
system must have a unique address (1..8).
Sequence of Operation:
When a boiler is set as Lead Lag Master = Enabled and
Modbus address =1, the controller of this boiler will drive
the lead lag operation.
The outdoor temperature sensor connected to the slave
boiler 2 (ie. B-2) will be the outdoor sensor for the lead lag
system.
•
The system temperature sensor connected to
boiler 1 (the master) in terminals labeled
“Outdr/Sys” in the junction box will be the control
sensor for lead lag operaiton.
•
The start/stop signal connected to boiler 1 (the
master) at terminals labeled “Remote Operator”
will be the enable signal for lead lag operation.
When the enable signal is present and there is a heat
demand, the lead boiler will start and uses the lead lag
parameters for boiler modulation. After a period of
“Interstage delay” the master boiler compares the lead lag
temperature with the lead lag set point and will check if:
1. An additional boiler is needed : Lead lag
temperature < Lead lag setpoint
– Add stage Error
Threshold
2. Number of boilers remain the same : Lead lag
temperature > Lead lag setpoint
– Add Stage Error
Threshold AND Lead lag < Lead lag setpoint +
Drop Stage Error Threshold
3. A boiler should stop : Lead lag temperature >
Lead lag se Drop Stage Error Threshold
4. All boilers off : Lead lag temperautre > Lead lag
se Off Hysteresis
If the lead lag master system is interrupted, the remaining
boilers will operate as standalone boilers based on the
Central Heat or DHW parameters when set to “Enabled”.
Rotation
Rotation time is configurable based on equalized run time
(default) or a fixed rotation schedule.
Interstage Delay
The length of time to wait between requesting a slave SOLA
to fire. (Default: 2 minutes)
Base Load Rate
When a call for heat is initiated the lead boiler runs up to
the desired base load rate (default: 80%) and continues to
operate in this fashion based on the above 4 scenarios. If
the lead lag temperature is not satisfied a second boiler is
fired and they would both operate up to 80% fire rate.
Slave State
Slave Status Manager
Unknown Table entry is unused or empty
Available Slave is operational and ready to use
Add Stage Stage is getting ready to fire
Suspend Stage Stage was getting ready but is not needed
Disabled Slave is locked out or disabled
Recovering
Slave is in time delay to verify that it is
operational before considered to be
available
Wiring the Lead Lag Setup
Use Cascade terminals in the juntion box to wire lead lag
appliances.
Master Slave 2 .. Slave 7
J3, MB2
A A .. A
B B .. B
C C .. C
Figure 37: Lead Lag Wiring Setup (Left: Master, Right:
Slave)
NOTE
Recycle power on all boilers after programming is
complete if lag boilers are not discovered automatically
NOTE
CH Setpoint or DHW Setpoint must match Setpoint
located in Lead Lag Master Configuration, for the
system to operate correctly.
NOTE
The Local/Remote switch must be set in the “Local”
position on ALL lag boilers.
6.3 SAFETY AND SYSTEM FUNCTIONS
6.3.1 On-board Physical Lockout Reset
The Valiant FT control board is equipped with a push button
and a 2 color (red/green) LED.
The green LED will be ON when the control is operational.
The red LED will be ON when the control has a lockout
error.
The control can be reset with the push button when control
has a lockout error.
6.3.2 Flame Detection
When the Valiant FT is running but the flame is not detected
anymore, the gas valve will be closed and the control will
perform a post-purge, after which a restart will take place.
When the flame disappears 3 times within one heat demand
the control will lockout.
The presence of a flame is measured using the flame rod
which points into the flame. When a flame is present, the
free electrons in the flame flow from the flame rod to ground.