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13
-45
Temperature Regulator – Annex
Completely discharge the internal pressure from the valves before disassembly.
13
T
emperatur
e Regulator
Inadequate adjustment. .....................................
Nominal size of the product is too small ...........
for the specifications of the system.
Temperature range of the product is not proper. ....
Ambient temperature exceeds set temperature. ....
Insufficient drainage from the trap of heat ........
exchanger.
Heat radiation area is too small. ............................
CAUTION
Please refer to the manual attached to the product for procedures for installation and operation.
OB-1, OB-1G, OB-2, OB-2G, OB-5, OB-6
Temperature
does not rise.
Temperature
does not fall.
Temperature
rises
excessively.
Temperature
falls
excessively.
Large error of
temperature
control.
Large error of
temperature
control.
Trouble
Trouble
Cause
Cause
Remedy
Remedy
Inadequate adjustment. .....................................
Nominal size of the product is too small ...........
for the specifications of the system.
Temperature range of the product is .................
not proper.
Thermal bulb or bellows is damaged. ...............
Inadequate adjustment. .....................................
Foreign substances are stuck at the valve, .......
or the valve is damaged.
Leakage from by-pass line. ...............................
Thermal bulb or bellows is damaged. ...............
Inadequate adjustment. .....................................
Foreign substances are stuck at the valve, .......
or the valve is damaged.
Leakage from by-pass line. ...............................
Ambient temperature exceeds set ....................
temperature.
Spindle does not move smoothly due to ..........
over-tightened cap nut.
Bellows or spindle is deformed due to outer ....
shocks or excessive heat.
Thermal bulb and thermometer are installed ....
improperly or in wrong positions.
Spindle does not move smoothly due to ..........
over-tightened cap nut.
Bellows or spindle is deformed due to outer ....
shocks or excessive heat.
Thermal bulb and thermometer are installed ....
improperly or in wrong positions.
OB-3, OB-3G, OB-4, OB-4G
Readjust according to the adjustment procedures.
Replace the product with one of proper nominal size.
Check the name plate and replace the product.
Lower the ambient temperature by providing fans
or ventilation windows.
Open the trap’s by-pass line and check the
condition.
Recalculate the heat radiation area required, or
reconsider the piping around the product.
Readjust according to the adjustment procedures.
Replace the product with one of proper nominal size.
Check the name plate and replace the product.
Replace the temperature-sensing parts or the product.
Readjust according to the adjustment procedures.
Disassemble and remove the foreign substances.
Lap the valve and valve seat if scratches are found.
Repair or replace.
Lower the ambient temperature by providing fans or
ventilation windows.
Loosen the cap nut to make the spindle move
smoothly.
Replace the product.
Reinstall them properly in proper positions.
Readjust according to the adjustment procedures.
Disassemble and remove the foreign substances.
Lap the valve and valve seat if scratches are found.
Repair or replace.
Replace the temperature-sensing parts or the product.
Loosen the cap nut to make the spindle move
smoothly.
Replace the product.
Reinstall them properly in proper positions.
