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Designs, materials, weights and performance ratings are approximate and subject to change without notice. Visit
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8
Glossary
APS
Air pressure switch
BCB
Boiler Control Board
BDB
Boiler Display Board
Blocking
Limit situation is touched, boiler OFF;
when the safe situation is restored, boiler On.
CCB
Cascade Control Board
CDB
Cascade Display Board
CH
Central Heating
Condensate
Water vapor generated as a product of combustion,
which has a low pH.
DHL
Double High Limit
iDHW
Domestic Hot Water
Diverter Valve
Motorized valve with spring return
DHW
Direct Hot Water production (instantaneous)
Hard Lock Out (HLO)
A significant error or issue with the appliance or system,
such as multiple failures to light or an unsafe pressure
differential. An error code at this level will trigger a
shutdown of the affected appliance(s). Service or repair
is required.
HLO
Hard Lock Out—Manual needed to energize the boiler
HMI
Human Machine Interface
Hysterese
Blocking set temp offset temperature—
hysterese is starting temperature for the boiler.
ICM
Interface Cascade Manager (with or without WiFi)
Indirect Tank
Sanitary hot water tank with a built in heat exchanger
INI
Baseline data initialization, runs by default every 14 days
Lead-Lag System
If plant production is operating heavily, the lead-lag system
will bring in the secondary boilers to help spread out the
load. When the lead-lag system senses that production has
dropped off, it then shuts those secondary boilers down
again.
Modbus
For Ethernet or RS232 or RS485 bus system for Lead and
Leg communication
Offset
Overriding temperature above set blocking: boiler OFF
PAVO
Zone controller
PCB
Printed circuit board—burner control board
Soft Lock Out (SLO)
Manual or App Rest needed to energize the boiler
Tank
Sanitary Hot Water Tank without internal Heat exchanger
3-Way-Valve
Motorized valve: turning to the right and to the left
Par
Parameter
n.a.
Not applicable. Constant value.
TBD
To be defined
Z-INI
First INI process
General Information - continued