85
21.10.11
O
FF
D
IFFERENTIAL
V
OLTS
When programmed for BMS control through the 0 - 10V BMS input or through ModBus/BACnet and the BMS
Thermostat Input is set to INACTIVE, the Off Differential Volts parameter determines how far below the On Volts
setting the 0 - 10V BMS input voltage must be in order to disable the boiler. The minimum value is 0.2V and the
maximum is the On Volts setting. The default value is 1.0V.
21.10.12
M
OD
B
US
/BAC
NET
When BMS is set to ACTIVE (see BMS Active / Inactive) and the boiler is being controlled through BACnet or
ModBus, set ModBus/BACnet parameter to ACTIVE. Otherwise, set the ModBus/BACnet parameter to INACTIVE.
Note that the boiler can still be monitored by ModBus or BACnet with this parameter set to INACTIVE. The default
value is INACTIVE
21.10.13
BAS
T/O
This is the amount of time the unit controls will wait to receive a communication string from the BMS controller
before reverting back to its own internal parameters. This parameter is adjustable by the installer by accessing the
BAS T/O parameter. The adjustment range of this parameter is 5 seconds to 2 minutes. The default value is 10
seconds.
21.11
CIRCULATION PUMPS
21.11.1
S
YSTEM
P
UMP
D
ELAY
The system pump delay parameter sets the length of time the system pump (if connected) will run after a SH demand
has been satisfied or outdoor shutdown has begun. This parameter is adjustable by the installer by accessing the
System Pump Delay parameter. The time range for this parameter is
1 second to 40 minutes. The default time is 30 seconds.
21.11.2
B
OILER
P
UMP
D
ELAY
The SH pump delay parameter sets the length of time the boiler pump will run after a SH demand has been satisfied.
Setting the delay time to 0 will disable the pump. This parameter is adjustable by the installer by accessing the
Boiler Pump Delay parameter. The time range for this parameter is
1 second to 40 minutes. The default time is 30 seconds.
21.11.3
DHW
P
UMP
D
ELAY
The DHW pump delay parameter sets the length of time the DHW pump (if connected) will run after a DHW demand
has been satisfied. This parameter is adjustable by the installer by accessing the DHW Pump Delay parameter. The
time range for this parameter is 10 seconds to 40 minutes. The default time is 1 minute.
21.11.4
S
YSTEM
P
UMP
A
NTI
-S
EIZE
D
ELAY
If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of
time it runs is determined by the System Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to
40 minutes. The default setting is 20 seconds.
21.11.5
B
OILER
P
UMP
A
NTI
-S
EIZE
D
ELAY
If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of
time it runs is determined by the Boiler Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to
40 minutes. The default setting is 20 seconds.
21.11.6
DHW
P
UMP
A
NTI
-S
EIZE
D
ELAY
If the boiler pump does not run for 24 hours, it will be turned on briefly to prevent it from seizing. The length of
time it runs is determined by the DHW Pump Anti-Seize Delay parameter. The range of this setting is 0 seconds to
40 minutes. The default setting is 20 seconds.
Summary of Contents for HERALD HCB116CE
Page 8: ...8 3 1 2 PRINCIPLE PARTS TO BE USED IN CONJUNCTION WITH TABLE 3 1 1...
Page 31: ...31 Max distance between brackets...
Page 32: ...32...
Page 33: ...33...
Page 37: ...37...
Page 53: ...53 15 8 WIRING DIAGRAM 15 8 1 WIRING DIAGRAM...
Page 54: ...54 15 9 LADDER DIAGRAM 15 9 1 LADDER DIAGRAM...
Page 92: ...92...
