Lochinvar HERALD HCB116CE, Installation Manual

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21.11.7 S
YSTEM
P
UMP
T
YPE
The system pump can be programmed to operate in response to any of the Room Thermostat inputs, or to run
continuously until all three (3) SH demands go into Outdoor Shutdown. To program the system pump to operate
only with a space heating call for heat, set the System Pump Type parameter to CFH. To program the system pump
to run continuously until outdoor shutdown starts, set the System Pump Type parameter to WWSD. The default
setting is CFH.
21.11.8 B
OILER
P
UMP
D
ELTA
T S
ET
P
OINT
When using a variable speed boiler pump, and controlling it by means of the 0 - 10V Boiler Pump Speed Output, the
boiler pump will be controlled in order to maintain a minimum Delta T across the heat exchanger in the boiler (other
factors may override this target). This feature is to be used with Primary / Secondary piping systems only. A system
supply sensor MUST be installed. This parameter sets the target minimum Delta T it will use. The range of this
parameter is 8°C to (33°C. The default value is 11°C.
21.11.9 B
OILER
P
UMP
M
INIMUM
V
OLTAGE
The speed of the boiler pump can be controlled by the SMART SYSTEM control in order to maintain a minimum 'T
through the heat exchanger. Thus, as the firing rate decreases, the speed of the boiler pump can decrease as well.
The SMART SYSTEM control outputs a 0 - 10V signal to the boiler pump to control its speed. The Boiler Pump
Minimum Voltage parameter determines the minimum voltage given to the boiler pump, thereby setting its minimum
speed. The range of this setting is 2.5V to 10V. The default setting is 3.5V.
The standard pumps supplied with the herald boiler are
A
rated high efficiency fixed speed
pumps
21.12 SERVICE NOTIFICATION
Service Notification in Months
When the boiler control determines that a scheduled service is due based on days of installation, the boiler display
will turn yellow and a new status screen will appear informing the user that maintenance is required. This parameter
is adjustable by the installer by accessing the Service Notification in Months parameter. The time range for this
parameter is 0 months to 100 months. The default time is 12 months.
21.12.1 S
ERVICE
N
OTIFICATION
R
UNNING
T
IME
When the boiler control determines that a scheduled service is due based on the hours of actual operation, the boiler
display will turn yellow and a new status screen will appear informing the user that maintenance is required. This
parameter is adjustable by the installer by accessing the Service Notification Running Time parameter. The time
range for this parameter is 0 hours to 17,500 hours. The default time is 8,760 hours.
21.12.2 S
ERVICE
N
OTIFICATION
C
YCLES
When the boiler control determines that a scheduled service is due based on the number of boiler cycles, the boiler
display will turn yellow and a new status screen will appear informing the user that maintenance is required. This
parameter is adjustable by the installer by accessing the Service Notification Cycles parameter. The range for this
parameter is 0 cycles to 100,000 cycles. The default is 50,000 cycles.
21.12.3 R
ESET
M
AINTENANCE
R
EMINDER
Once servicing has been completed, the service notification counter should be reset. This parameter can be reset
by the installer by accessing the Reset Maintenance Reminder parameter. Once accessed, press the RESET key to
reset the service notification counter.