Bosch Heatronic 4000 Installation & Operating Instructions Manual page 7

Flow Monitoring - - - - - - - - - -------- ------- ------------ ---- - - - - - - - - - -------------------------------
The control has the capability to monitor flow through the connec-
tion of a 4-20 mA style analog flow sensor. Use the Flow Sensor
setting in the Setup menu to enable flow monitoring. The Flow
Rate 4 mA and Flow Rate 20 mA settings are then used to set
the minimum and maximum flow rates for the specific flow sensor
being used. Flow is measured in either gallons per minute (gpm)
or meters cubed per hour (m
the FLOW UNIT setting in the Toolbox menu.
In addition to flow monitoring, the flow sensor can also be
used to prove primary pump flow. Refer to the Pump Operation
section of this brochure for additional details.
Flow Rate 4 mA - - - - - - - - - ------- ------- -------- ---- ------ - - - - -------------------------------------
The Flow Rate 4 mA is applicable for flow monitoring and is
based on the flow sensor being used. This setting sets the flow
rate at 4 mA.
Flow Rate 20 mA - - - - - - - - ------ ---------- ------- --------- -- - - - - - - --------------------------------
The Flow Rate 20 mA is applicable for flow monitoring and is
based on the flow sensor being used. This setting sets the flow
rate at 20 mA.
Energy Monitoring - - - - - - --------- ---------- ----------- - - - - - - - - --------- -----------------------
The control has the capability to monitor Energy. The control
requires the boiler supply, boiler return sensor & the flow sensor
in order to calculate & display energy in either Therms (THRM)
or Gigajoules (GJ). The units are adjustable through the TEMP
UNIT setting in the Toolbox menu.
Pressure Monitoring - - - - -------- ----------- ---- --------- --------------------------- ---------
The control has the capability to monitor system pressure
through the connection of a specific style of Vdc pressure
transducer. Use the Pressure Sensor setting in the Setup menu
to enable pressure monitoring. Pressure is measured in either
psi or kPa. The units are adjustable through the PRESSURE
UNIT setting in the Toolbox menu.
Flue Temperature Monitoring & Limiting ------------- ---
The control has the capability to measure & limit the common
flue temperature. The FLUE MAX setting defines the operation
of the common flue sensor. If the common flue temperature
exceeds the FLUE MAX, the boiler plant is shut down. The boiler
plan will not be allowed to operate until the vent temperature
drops 10°F (6°C) below the FLUE MAX. If OFF is selected,
the common flue temperature is only monitored.
BTC461503101C | 6720810369 (2018/03)
3
/h). The units are adjustable through
------- ---------
Alert Dry Relay -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - - -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- - -- -- -- -- -- -
The control has an Alert Dry relay that closes whenever a
control or sensor error is detected, or when a warning or limiting
condition is detected. When the alert dry contact closes, refer
to the Error Messages section of this brochure to determine
the cause of the alert & how to clear the error.
Boiler Alert
If no temperature increase is detected at the boiler supply sensor
within this delay period, the Alert relay will close & the control
will display the NO HEAT error message. To clear the error,
press the CLEAR button while viewing the error message.
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