Acorn SFET VALVE - Manual (Page 5)

Page 5 of 7
CAUSE SOLUTION PROBLEM
1. SET POINT DIFFICULT TO SET OR
CANNOT BE REACHED
SUPPLY TEMPS NOT WITHIN
SPECIFIED LIMITS
HOT AND COLD SUPPLIES ARE
REVERSED
CHECK DIFFERENTIAL TEMPERATURE
BETWEEN SUPPLIES AND OUTLET
REINSTALL VALVE WITH SUPPLIES
CONNECTED TO MARKED INLETS
2. DOES NOT MAINTAIN OUTLET
TEMPERATURE OR CHANGES
FLUCUATION IN SUPPLY
PRESSURES
CHECK VALVE/FILTERS BLOCKED
WITH DEBRIS
CHECK DIFFERENTIAL TEMPERATURE
BETWEEN SUPPLIES AND OUTLET
CLEAN CHECK VALVES/FILTERS OVER TIME
3. DISCHARGE TEMPERATURE TOO
HOT OR TOO COLD
VALVE NOT ADJUSTED PROPERLY READJUST VALVE TEMPERATURE PER
INSTALLATION INSTRUCTIONS
4. CROSS FLOW CHECK VALVES FOULED CLEAN CHECK VALVES/FILTERS
5 NO FLOW FROM VALVE HOT AND COLD SUPPLY FAILURE
OR SHUTOFFS CLOSED OPEN SHUTOFFS OR RESTORE HOT
AND COLD SUPPLIES
CHECK VALVE/FILTERS BLOCKED
WITH DEBRIS CLEAN CHECK VALVES AND FILTERS
TYPICAL PIPING DETAIL
ET71 SERIES
VALVE
EMERGENCY
EYE/FACE WASH
SHOWN FOR
REFERENCE
HOT
WATER
SUPPLY
COLD
WATER
SUPPLY
TROUBLESHOOTING:
PIPING DETAILS:
Acorn Controls Division of Acorn Engineering Company ® , A member of Morris Group International ™
Date: 04/01/14
* In accordance with ASSE 1071
Valve Specifications:
Maximum Operating Pressure: ..................... 125 psi (861 kpa)
Maximum Hot Water Supply Temp: ..................... 180°F (82°C)
Outlet Temp. Range: ................................... 60-95°F (15-35°C)
Minimum Hot Water Supply ........................................ 5°F (3°C)
Above Set Point
Flow Rate at 45 psi (310 kpa) differential:
ET71-1: ............................................................ 12 gpm (45 lpm)
ET71-2: .......................................................... 43 gpm (163 lpm)
ET71-3: .......................................................... 86 gpm (326 lpm)
ET71-4: ........................................................ 150 gpm (568 lpm)
Minimum Flow*:
ET71-1 ........................................................... 1.5 gpm (5.7 lpm)
ET71-2 .............................................................. 1 gpm (3.8 lpm)
ET71-3 .............................................................. 2 gpm (7.6 lpm)
ET71-4 ............................................................ 3 gpm (11.4 lpm)
Bypass Flow Rate Minimum*:
ET71-1: ........................................................ 6.5 gpm (24.5 lpm)
ET71-2: .......................................................... 25 gpm (95 lpm)
ET71-3: .......................................................... 60 gpm (227lpm)
ET71-4: .......................................................... 80 gpm (303 lpm)
Cold Water Failure Maximum*:
ET71-1: .......................................................... 0.5 gpm (1.9 lpm)
ET71-2: ............................................................ 1 gpm (3.8 lpm)
ET71-3: ............................................................ 1 gpm (3.8 lpm)
ET71-4: ............................................................. 1 gpm (3.8 lpm)
SFET Installation & Operation Manual
Manual #7802-119-000