BMC and
MAKE SURE YOU HAVE THE RIGHT CONTROL
If you need the
INITIAL SETUP
Setting an Initial Program will ease the configuration of the BMC and will give the opportunity to utilize many of the energy saving features and give more comfortable heat when needed.
The program should consist of the following:
•Selecting the features that your system can utilize,
•Installation: Install the Control, switches and sensors,
•Setting the System Startup,
•Setting the System Settings,
•Setting the Stages
•Adjusting Reset Ratio and Water Offset (In Reset Mode Only)
SELECTING THE SYSTEM FEATURES
The BMC has been designed with Hydronic building heating as the primary purpose. With this in mind, many of the BMC features can be utilized to ease, enhance and improve your system performance. Some of these features are listed in this section.
OUTDOOR RESET OR SET POINT
•The BMC can control the System Temperature either by adjusting the calculated temperature according to the Outdoor Temperature (Outdoor Reset) or by maintaining an adjustable Set Point. The earlier relies on an Outdoor Sensor (supplied with the control) and achieves better fuel savings in addition to better comfort.
NUMBER OF STAGES
•The BMC can be configured to control up to 4 modulating boilers. It can control up to 16 boiler stages using a maximum of two
MODULATION MODE
•The BMC can stage boilers using one of two methods. Normal Modulation Mode, allows it to increase the modulation of the lead boiler. When the lead boiler reaches its modulation start point adjustment and does not satisfy the load, the BMC will start the next boiler and so on. This mode targets boilers that can run more efficient at higher modulation rates.
•The Parallel Modulation Mode can modulate several boilers together as a one large boiler. This mode is useful for boilers that are more efficient at lower firing points.
MODULATING SIGNAL
•The BMC is designed to accurately control the output from 0 to 100% of modulation for each of these different types of motors. One BMC can even control a variety of the above different modulation motors.
AUTOMATIC ROTATION AMONG BOILERS
•Rotating the first burner to be activated on a call for output promotes even wear on all burners. The BMC has three modes of rotation: Manual,
STANDBY BOILER
•Any boiler can be configured as a Standby boiler. It withholds a specific boiler from being included in the Lead Rotation. However, the Standby boiler will be fired only as a backup when all other stages combined cannot satisfy the demand and after an adjustable delay period.
SETBACK OR DAY/NIGHT SCHEDULING
Two Setback modes are available for the BMC:
•The Day/Night Scheduling provides an adjustable
•The Setback mode uses an external signal to switch the operation of the BMC in and out of setback mode.
6
