Laars heating systems – LAARS Pennant PNCV (Sizes 200, 300, 400) - Install and Operating Manual User Manual
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LAARS Heating Systems
Page 16
Pennant 200, 300, 400
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Figure 6. Hydronic Piping — One Boiler, Multi-Temperature System.
SYSTEM PUMP
MAKE-UP
COLD WATER
PUMP LOCATION FOR
PUMP-MOUNTED UNITS
PRIMARY/SECONDARY MANDATORY FOR ALL
VARIABLE FLOW SYSTEMS
INSTALL AIR VENTS AT HIGH POINTS IN SYSTEM
PIPING & SIZING OF EXPANSION TANK
PER TANK MANUFACTURER'S INSTRUCTIONS
DIMENSION "C" (COMMON PIPING) TO BE FOUR
PIPE DIAMETERS, MAX. (NO ELBOWS OR VALVES)
BOILER CIRCUIT PIPING MUST BE EQUAL
TO BOILER WATER CONNECTION SIZE
BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER
DOTTED DEVICES INDICATE ALTERNATE LOCATIONS
PUT BOILER CONTROL SENSOR IN THE SYSTEM
SUPPLY WHEN USING THIS PIPING STYLE.
MINIMUM BOILER INLET WATER TEMPERATURE
MUST BE AT LEAST 120°F.
C
C
C
C
180°F
180°F
150°F
130°F
NOTES:
1. BOILER LOOP IN EXAMPLE IS MAINTAINED AT 180°F.
2. ZONE THERMOSTATS CAN BE INTERLOCKED WITH BOILER,
SO THAT BOILER FIRES UPON CALL FOR HEAT FROM ANY
ZONE.
3. ZONE PIPING AND INTERLOCK WIRING TO BE DESIGNED
BY SYSTEM ENGINEER.
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
CHECK VALVE
TEMPERATURE
SENSOR
VALVE
PURGE VALVE
THERMOMETER
GLOBE VALVE
EXPANSION TANK
WITH AIR SCOOP AND
AUTO AIR VENT
PUMP
PRESSURE REDUCING VALVE
W/ FAST FILL BYPASS
3-WAY VALVE
Figure 7. Hydronic Piping — Primary-Secondary, Reverse-Return.
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING, CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
C
SYSTEM PUMP
MAKE-UP
COLD WATER
SUPPLY
SYSTEM
PUMP LOCATION FOR
PUMP-MOUNTED UNITS
RETURN
SYSTEM
PRIMARY/SECONDARY MANDATORY FOR ALL
VARIABLE FLOW SYSTEMS
INSTALL AIR VENTS AT HIGH POINTS IN SYSTEM
PIPING & SIZING OF EXPANSION TANK
PER TANK MANUFACTURER'S INSTRUCTIONS
DIMENSION "C" (COMMON PIPING) TO BE FOUR
PIPE DIAMETERS, MAX. (NO ELBOWS OR VALVES)
BOILER CIRCUIT PIPING MUST BE EQUAL
TO BOILER WATER CONNECTION SIZE
BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER
DOTTED DEVICES INDICATE ALTERNATE LOCATIONS
PUT BOILER CONTROL SENSOR IN THE SYSTEM
SUPPLY WHEN USING THIS PIPING STYLE.
MINIMUM BOILER INLET WATER TEMPERATURE
MUST BE AT LEAST 120°F.
CHECK VALVE
TEMPERATURE
SENSOR
VALVE
PURGE VALVE
THERMOMETER
GLOBE VALVE
EXPANSION TANK
WITH AIR SCOOP AND
AUTO AIR VENT
PUMP
PRESSURE REDUCING VALVE
W/ FAST FILL BYPASS
3-WAY VALVE