SERVICE (cont.)
PRESSURE REGULATOR and NEEDLE VALVE
P1935 |
FIG. 30 PRESSURE REGULATOR |
and NEEDLE VALVE |
Location:
The pressure regulator and needle valve are located inside the rear panel at the bottom of the dispenser.
Adjustments:
The water pressure regulator is preset at the factory to produce 15 psi (103 kPa) of water pressure at the regulator outlet with inlet pressures ranging from 20 psi to 90 psi (138 to 620 kPa). No field adjustments of the pressure regulator should ever be necessary.
The needle valve is preset at the factory to dispense 1 fluid ounce of water per second. The dispenser is designed to accommodate various product mix ratios by adjusting the product dispense rate (see Initial Setup). Should a readjustment of the water dispense rate become necessary, proceed as follows:
1.Disconnect the dispenser from the power source.
2.Remove the six
3.Turn the needle valve adjustment screw counter- clockwise to increase the water flow rate, and clockwise to decrease the water flow rate.
Removal and Replacement:
Pressure Regulator
1.Disconnect the dispenser from the power source and the water supply.
2.Remove the six
3.Disconnect the .25" copper tube from the outlet of the pressure regulator.
4.Loosen the nut securing the bulkhead fitting to the dispenser.
5.Remove the bulkhead fitting from the inlet to the pressure regulator.
6.Remove the pressure regulator assembly.
7.Attach the regulator to the bulkhead fitting making sure that the copper bushing is seated properly in the regulator and tighten securely.
8.Tighten the nut securing the bulkhead fitting to the dispenser housing.
9.Attach the .25" copper tube to the regulator assem- bly and tighten securely.
10.Connect the dispenser to the water source and check for leaks. Tighten any leaking connections before installing rear panel.
Removal and Replacement:
Needle Valve
1.Disconnect the dispenser from the power source and the water supply.
2.Remove the six
3.Disconnect the .25" copper tube from the inlet fitting on the needle valve.
4.Disconnect the water outlet from the solenoid valve.
5.Remove the solenoid valve and needle valve as described in section- Dispense Solenoid Valve.
6.Remove the needle valve assembly. Remove the fitting from the inlet port of the needle valve.
7.Install the fitting removed from the old needle valve onto the new needle valve using pipe thread sealant (BOM #M2526.0000).
8.Attach the needle valve to the fitting on the dispense solenoid valve using pipe thread sealant (BOM #M2526.0000) and tighten securely.
9.Install the solenoid valve and needle valve as de- scribed in section- Dispense Solenoid Valve.
10.Attach water inlet and outlet lines and tighten se- curely.
11.Connect the dispenser to the water source and check for leaks. Tighten any leaking connections before installing rear panel.
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