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Laars heating systems, Page 14 – LAARS Rheos RHCV - Install and Operating Manual User Manual

Page 14

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LAARS Heating Systems

Page 14

OPTIONAL PUMP MOUNTED UNIT AVALIABLE

BOILER CIRC.

PUMP

COLD WATER

MAKE-UP

SYSTEM PUMP

SYSTEM

RETURN

SYSTEM

SUPPLY

C

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

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

PUT BOILER CONTROL SENSOR IN THE OUTLET

WHEN USING THIS PIPING STYLE

2

CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING. CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.

DIMENSION ''C'' TO BE 4 PIPE DIAMETERS
DIMENSION ''D'' TO BE 18" MINIMUM

D

Figure 7. Hydronic Piping - Alternate System.

Figure 8. Hydronic Piping - Alternate Low Temperature System.

OPTIONAL PUMP MOUNTED UNIT AVALIABLE

BOILER CIRC.

PUMP

COLD WATER

MAKE-UP

SYSTEM PUMP

SYSTEM

RETURN

SYSTEM

SUPPLY

ADJUSTMENT PROCEDURE TO MAINTAIN 130° F INLET TEMP.

1. Turn on heater and open valves A & B
2. After steady-state operation, if T1 is less than

130° F, slowly close valve B until T1 climbs to 130° F

3. If T 1 is greater than 130° F, slowly

close valve A until T1 drops to 130° F

4. Check after system operating temperature has

stabilized. Make final adjustments.

A

B

A

B

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

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

PUT BOILER CONTROL SENSOR IN THE OUTLET

WHEN USING THIS PIPING STYLE

2

CAUTION: THIS DRAWING SHOWS SUGGESTED
PIPING CONFIGURATION AND VALVING. CHECK
WITH LOCAL CODES AND ORDINANCES FOR
ADDITIONAL REQUIREMENTS.

DIMENSION ''C'' TO BE 4 PIPE DIAMETERS
DIMENSION ''D'' TO BE 18" MINIMUM

C

D

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