Acorn ST7069 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 OR 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
COLD
WATER
SUPPLY
TYPICAL 1069 APPLICATION PIPING DETAIL
ST7069
HOT
WATER
SUPPLY
COLD
WATER
SUPPLY
TYPICAL 1070 APPLICATION PIPING DETAIL
ST7069 HOT
WATER
SUPPLY
Valve Specifications:
Maximum Operating Pressure: ................... 125 psi (862 kpa)
Maximum Hot Water Supply Temp: .................... 180°F (82°C)
Minimum Hot Water Supply Temp.**: ................... 10° F (6° C)
Above Set Point
Outlet Temp. Range*: .............................. 90-115°F (32-46°C)
Flow Rate: .................... 12 gpm (45 lpm) @ 45 psi (310 kpa)
Differential
Minimum Flow*: ........................................... 0.5 gpm (1.9 lpm)
*In accordance with ASSE 1070 and ASSE 1069
**Inlet Supply Pressure Variation Up to 20% TROUBLESHOOTING:
PIPING DETAILS:
Acorn Controls Division of Acorn Engineering Company ® , A member of Morris Group International ™
Manual #7802-115-000 Date: 04/01/14
ST7069 Installation & Operation Manual