A C O R N
RECIRCULATING PIPING DIAGRAM:
WATER
HEATER
C
C
T
T
EXPANSION
TANK
HIGH TEMPERATURE
HOT WATER FIXTURES
LOW TEMPERATURE
HOT WATER FIXTURES
HEAT
TRAP
CONTROL
VALVE
BALANCING
VALVE
LOW TEMP
FIXTURE
RETURN
HIGH TEMP
FIXTURE RETURN
T
C
CHECK VALVE
BALANCING VALVE
TEMP/PRESSURE GAUGE
CIRCULATOR
FLOW DIRECTION
C
SELECT FLOW RATE NECESSARY TO ENSURE MIXING VALVE IS
OPERATING AT AN ASSE 1017 MINIMUM CERTIFIED FLOW RATE.
SEE LITERATURE.
COLD
WATER
SUPPLY
TYPICAL CONTINUOUS RECIRCULATION
WATER
HEATER
C
C
T
T
EXPANSION
TANK
HIGH TEMPERATURE
HOT WATER FIXTURES
LOW TEMPERATURE
HOT WATER FIXTURES
HEAT
TRAP
CONTROL
VALVE
BALANCING
VALVE
LOW TEMP
FIXTURE
RETURN
HIGH TEMP
FIXTURE RETURN
T
C
CHECK VALVE
BALANCING VALVE
TEMP/PRESSURE GAUGE
CIRCULATOR
FLOW DIRECTION
C
SELECT FLOW RATE NECESSARY TO ENSURE MIXING VALVE IS
OPERATING AT AN ASSE 1017 MINIMUM CERTIFIED FLOW RATE.
SEE LITERATURE.
COLD
WATER
SUPPLY
TYPICAL RECIRCULATION WITH AQUASTAT
ADJUSTABLE
AQUASTAT
NOTE: TO BALANCE THE SYSTEM, BEGIN WITH DIVERTING 80% OF THE
RETURN WATER TO COLD SIDE OF THE TEMPERING VALVE (20% OF THE
HOT WATER SOURCE). CONTINUE ADJUSTING UNTIL SYSTEM IS FULLY
BALANCED.
A HEAT TRAP IS RECOMMENDED IF THE MIXING VALVE IS ABOVE THE
WATER HEATER.
NOTE: TO BALANCE THE SYSTEM, BEGIN WITH DIVERTING 80% OF THE
RETURN WATER TO COLD SIDE OF THE TEMPERING VALVE (20% OF THE
HOT WATER SOURCE). CONTINUE ADJUSTING UNTIL SYSTEM IS FULLY
BALANCED.
A HEAT TRAP IS RECOMMENDED IF THE MIXING VALVE IS ABOVE THE
WATER HEATER.
Page 7 of 8
Acorn Controls
Division of Acorn Engineering Company
®
, A member of Morris Group International
™
SFST Installation & Operation Manual
Manual #7802-117-000
Date: 09/22/17
