Acorn ST70 VALVE - Manual (Page 5)

Manual #7802-112-001
Page 5 of 5
TROUBLESHOOTING:
PIPING DETAILS:
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 PRESSURE
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
Valve Specifications:
Maximum Operating Pressure: .................... 125 psi (861 kpa)
Flow Rate @ 45psi (310 kpa) differential:
ST70-12: ...................................................... 4.5 gpm (17 lpm)
ST70-38: ...................................................... 4.0 gpm (15 lpm)
Minimum Flow Rate*: ................................... 0.4 gpm (1.5 lpm)
Maximum Hot Water Supply Temp: ..................... 180°F (82°C)
Minimum Hot Water Supply Temp**: ........................ 5°F (3°C)
Above Set Point
Temperature Range*: ................................ 85-115°F (29-46°C)
Connections ............................ 1/2” NPT or 3/8” Compression
COLD
WATER
SUPPLY
COLD
WATER
SUPPLY
TYPICAL SINGLE TEMPERATURE PIPING DETAIL FAUCET
TYPICAL TWO HANDLE PIPING DETAIL FAUCET
ST70
HOT
WATER
SUPPLY
HOT
WATER
SUPPLY ST70
*In Accordance with ASSE 1070
**Under Normal Operating Conditions
Acorn Controls Division of Acorn Engineering Company ® , A member of Morris Group International ™
Date: 04/01/14
ST70 Installation & Operation Manual