LAARS Rheos RHCV - Install and Operating Manual - Manual (Page 12)

LAARS Heating Systems Page 12
SYSTEM
BOILER CIRC.
PUMP
SYSTEM PUMP
THERMOMETER
GLOBE VALVE
CHECK VALVE
PRESSURE REDUCING VALVE
W/ FAST FILL BYPASS
EXPANSION TANK
WITH AIR SCOOP AND
AUTO AIR VENT
PUMP
LEGEND
VALVE
TEMPERATURE
SENSOR
3-WAY VALVE
PURGE
VALVE
C
COLD WATER
MAKE-UP
OPTIONAL PUMP MOUNTED UNIT AVAILABLE
C
RETURN
SYSTEM
SUPPLY
INSTALL AIR VENTS AT HIGH POINTS IN SYSTEM
PIPING & SIZING OF EXPANSION TANK
PER TANK MANUFACTURER'S INSTRUCTIONS
PRIMARY/SECONDARY MANDITORY FOR ALL
VARIABLE FLOW SYSTEMS
DIMENSION ''C'' TO BE 4 PIPE DIAMETERS
BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER
BOILER CIRC. PUMP TO BE USED WITH EM
DOTTED DEVICES INDICATE ALTERNATE LOCATIONS
BOILER CIRCUIT PIPING MUST BE EQUAL TO
BOILER WATER CONNECTION SIZE
SYSTEM TEMP. INTERLOCK REQUIRED
MULTIPLE STAGE BOILERS RECOMMENDED
2
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING. CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
D D
DIMENSION ''D'' TO BE 18" MINIMUM
THERMOMETER
GLOBE VALVE
CHECK VALVE
PRESSURE REDUCING VALVE
W/ FAST FILL BYPASS
EXPANSION TANK
WITH AIR SCOOP AND
AUTO AIR VENT
PUMP
LEGEND
VALVE
TEMPERATURE
SENSOR
3-WAY VALVE
PURGE
VALVE
SYSTEM
RETURN SYSTEM
SUPPLY
INSTALL AIR VENTS AT HIGH POINTS IN SYSTEM
PIPING & SIZING OF EXPANSION TANK
PER TANK MANUFACTURER'S INSTRUCTIONS
PRIMARY/SECONDARY MANDITORY FOR ALL
VARIABLE FLOW SYSTEMS
BOILER CIRC. PUMP SIZED FOR FLOW THROUGH BOILER
BOILER CIRC. PUMP TO BE USED WITH EM
DOTTED DEVICES INDICATE ALTERNATE LOCATIONS
BOILER CIRCUIT PIPING MUST BE EQUAL TO
BOILER WATER CONNECTION SIZE
SYSTEM TEMP. INTERLOCK REQUIRED
MULTIPLE STAGE BOILERS RECOMMENDED
2
CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING. CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.
BOILER CIRC.
PUMP
C
A
B
T1
ADJUSTMENT PROCEDURE TO MAINTAIN 130° F INLET TEMP.
1. Turn on heater and open valves A & B
3. If T1 is greater than 130° F, slowly
close valve A until T1 drops to 130° F
4. Check after system operating temperature has
2. After steady-state operation, if T1 is less than
130° F, slowly close valve B until T1 climbs to 130° F
stabilized. Make final adjustments
OPTIONAL PUMP MOUNTED
UNIT AVAILABLE
COLD WATER
MAKE-UP
SYSTEM PUMP
B
C
A
B
T1
D D
DIMENSION ''C'' TO BE 4 PIPE DIAMETERS
DIMENSION ''D'' TO BE 18" MINIMUM
Figure 4. Hydronic Piping — Multiple Boilers, Primary Secondary System.
Figure 5. Hydronic Piping — Multiple Boilers, Low Temperature System.