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DHW METHODS
HeatNet Control V3
Page 36
DHW Method 2: Failsafe Combination DHW and Space Heating with a MASTER
Boiler and MEMBER Boilers Utilizing Pumps (MASTER Type: Combination)
Figure 31
In this example the MASTER is not a DHW boiler.
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DH
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Member 2
Cold Water
Makeup
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Backflow
Prevention
Pressure
Reducing
Ball Valve
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Member 3
Master
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Domestic Hot
Water
Supply
Make
Up
Dual
Tank Sensor
WM
Water Meter
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Only
Combination
Failsafe
Heating
Combination
Failsafe
DHW
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System Return
System Header Sensor
System Return Sensor
System Pump
MIN 3X PIPE DIAMETERS
MAX 10X PIPE DIAMETERS
BETWEEN CENTERS
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System Supply
HeatNet
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DHW METHOD 2: Failsafe Combination DHW and Space Heating using a MASTER Boiler and MEMBER boilers with
pumps
In this method the MASTER simultaneously controls both space heating and DHW heating. The MASTER is piped to only
service space heating, and both MEMBERs are piped to service space heating and DHW heating demands. The MASTER’s
Heat Demand
input enables space heating by energizing the system pump and maintaining the Heating Setpoint at the System
Header Sensor. The MASTER’s
OR OVR
input enables the DHW heating, by maintaining the DHW Setpoint at the DHW
Sensor located in the DHW tank.
Boilers are staged to meet both the Space Heating Setpoint, and the DHW Setpoint based on their runtime. When a boiler is fired
to service a space heating demand it will enable its local pump, and when a boiler is fired to service a DHW demand it will enable
its DHW pump. The MASTER modulates the boilers in order to maintain the setpoints.
This method allows for a MEMBER boiler to provide
Failsafe
mechanisms in the event the MASTER fails and stops
communicating to the MEMBERs. MEMBER 2 is configured to provide failsafe space heating, and MEMBER 3 is configured to
provide both failsafe space heating and failsafe DHW heating.
Содержание FUTERA XLF Series
Страница 21: ...SETUP OPERATION HeatNet Control V3 Page 21 Figure 17 Mixed Boilers Example Condensing Non Condensing...
Страница 27: ...CONTROL METHODS HeatNet Control V3 Page 27 Figure 25 Base loading relay...
Страница 67: ...WIRING CONNECTIONS HeatNet Control V3 Page 67 Figure 49 Jumper Dip Switch Locations...
Страница 73: ...WIRING CONNECTIONS HeatNet Control V3 Page 73 Figure 57 Temperature sensors...
Страница 125: ...WORKSHEET HeatNet Control V3 Page 125 TURNDOWN ALTITUDE CALIBRATION SETTINGS MIN VFD IGN VFD MAX VFD...
Страница 127: ...413 568 9571 Fax 413 568 9613 Page 127...