22
Cast Iron Condensing Boilers – Installation Manual
FlexCore Stainless Steel Condensing Boilers – Installation Manual
Figure 13 - Typical Multiple Boiler Primary/Secondary Piping
Figure 11 - Typical Multiple Boiler Reverse Return Piping (RECOMMENDED)
(Careful consideration as to minimum boiler and system water flow rates must be taken. Please consult our local
manufactures representative for assistance.)
Figure 12 - Typical Single Boiler Primary/Secondary Piping
NOTE: Not all system valves may be shown. Consult local codes for additional system components which may be
necessary. For HeatNet operation, a sensor is required and installed at a minimum of 12" from primary loop tee.
NOTE: Not all system valves may be shown. Consult local codes for additional system components which may be
necessary. For HeatNet operation, a sensor is required and installed at a minimum of 12" from primary loop tee.
NOTE: Not all system valves may be shown. Consult local codes for additional system components which may be
necessary. For HeatNet operation, a sensor is required and installed at a minimum of 12" from primary loop tee.
RIOM-204 REV A
RIOM-203 REV A
RIOM-205 REV A
SUPPLY
SYSTEM
RETURN
SYSTEM
HIOM-11-REV.3
Pump
Tank
Expansion
Aquastat
Thermometer
Pressure
Relief Valve
Gate Valve
Pressure
Reducing Valve
Backflow-Prevention
Device
COLD WATER
MAKE-UP
Motorized
Valve
For Heat-net
Operation, A Sensor
Is Required And
Installed At A
Minimum Of 12" From
Primary Loop Tee.
Riom-0205_a
Tangential Type
Air Separator
Aquastat
Heat Net
Sensor
Presure
Reducing Valve
Presure
Relief Valve
Expansion
Tank
Thermometer
Backflow Prevention
Device
Gate Valve
Pump
SYSTEM
RETURN
AIR SEPARATOR
TYPICAL LOCATION
AIR SEPARATOR
ALTERNATE LOCATION
Motorized
Valve
M
M
M
M
M
SYSTEM
SUPPLY
COLD WATER
MAKE-UP
Water
Meter
WM
WM
For Heat-net
Operation, A Sensor
Is Required And
Installed At A
Minimum Of 12" From
Primary Loop Tee.
Riom-0205_a
Tangential Type
Air Separator
Aquastat
Heat Net
Sensor
Presure
Reducing Valve
Presure
Relief Valve
Expansion
Tank
Thermometer
Backflow Prevention
Device
Gate Valve
Pump
SYSTEM
RETURN
AIR SEPARATOR
TYPICAL LOCATION
AIR SEPARATOR
ALTERNATE LOCATION
Motorized
Valve
M
M
M
M
M
SYSTEM
SUPPLY
COLD WATER
MAKE-UP
Water
Meter
WM
WM
For Heat-net
Operation, A Sensor
Is Required And
Installed At A
Minimum Of 12" From
Primary Loop Tee.
Riom-0205_a
Tangential Type
Air Separator
Aquastat
Heat Net
Sensor
Presure
Reducing Valve
Presure
Relief Valve
Expansion
Tank
Thermometer
Backflow Prevention
Device
Gate Valve
Pump
SYSTEM
RETURN
AIR SEPARATOR
TYPICAL LOCATION
AIR SEPARATOR
ALTERNATE LOCATION
Motorized
Valve
M
M
M
M
M
SYSTEM
SUPPLY
COLD WATER
MAKE-UP
Water
Meter
WM
WM
MINIMUM 3X PIPE DIAMETERS
MAXIMUM 10X PIPE DIAMETERS
BETWEEN CENTERS
AIR SEPARATOR
TYPICAL LOCATION
FOR HEAT-NET
OPERATION, A SENSOR
IS REQUIRED AND
INSTALLED AT A
MINIMUM OF 12" FROM
PRIMARY LOOP TEE.
RIOM-0203_A
TANGENTIAL
TYPE AIR
SEPARATOR
AQUASTAT
HEAT NET
SENSOR
PRESURE
REDUCING VALVE
PRESURE
RELIEF VALVE
EXPANSION TANK
THERMOMETER
BACKFLOW PREVENTION
DEVICE
GATE VALVE
PUMP
SYSTEM
SUPPLY
SYSTEM
RETURN
AIR SEPARATOR
ALTERNATE LOCATION
COLD WATER
MAKE-UP
WM
WATER
METER
WM
MINIMUM 3X PIPE DIAMETERS
MAXIMUM 10X PIPE DIAMETERS
BETWEEN CENTERS
FOR HEAT-NET
OPERATION, A SENSOR
IS REQUIRED AND
INSTALLED AT A
MINIMUM OF 12" FROM
PRIMARY LOOP TEE.
RIOM-0204_A
TANGENTIAL
TYPE AIR
SEPARATOR
AQUASTAT
HEAT NET
SENSOR
PRESURE
REDUCING VALVE
PRESURE
RELIEF VALVE
EXPANSION TANK
THERMOMETER
BACKFLOW PREVENTION
DEVICE
GATE VALVE
PUMP
CHECK VALVE
SYSTEM
SUPPLY
COLD WATER
MAKE-UP
AIR SEPARATOR
TYPICAL LOCATION
SYSTEM
RETURN
AIR SEPARATOR
ALTERNATE LOCATION
WM
WATER
METER
WM
FOR HEAT-NET
OPERATION, A SENSOR
IS REQUIRED AND
INSTALLED AT A
MINIMUM OF 12" FROM
PRIMARY LOOP TEE.
RIOM-0205_A
TANGENTIAL TYPE
AIR SEPARATOR
AQUASTAT
HEAT NET
SENSOR
PRESSURE
REDUCING VALVE
PRESSURE
RELIEF VALVE
EXPANSION
TANK
THERMOMETER
BACKFLOW PREVENTION
DEVICE
GATE VALVE
PUMP
SYSTEM
RETURN
AIR SEPARATOR
TYPICAL LOCATION
AIR SEPARATOR
ALTERNATE LOCATION
MOTORIZED
VALVE
M
M
M
M
M
SYSTEM
SUPPLY
COLD WATER
MAKE-UP
