Bunn CDS-3 Manual De Usuario

31

FIG. 30 PRESSURE REGULATOR

and NEEDLE VALVE

P1935

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  #8-32  screws  securing  the  rear 

panel to the dispenser housing.

3.  Turn  the  needle  valve  adjustment  screw  coun-

terclockwise to increase the water flow rate, and 

clockwise to decrease the water flow rate.

Removal and Replacement:

1.  Disconnect the dispenser from the power source 

and the water supply.

2.  Remove  the  six  #8-32  screws  securing  the  rear 

panel to the dispenser housing.

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 as-

sembly 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:

1.  Disconnect the dispenser from the power source 

and the water supply.

2.  Remove  the  six  #8-32  screws  securing  the  rear 

panel to the dispenser housing.

3.  Disconnect the .25” copper tube from the inlet fit-

ting 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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