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4660 Pressure Pilot
May 2014
point. For low‐only constructions, perform only those procedures that pertain to setting and checking the low set
point. For high‐low constructions, perform procedures that pertain to both the high and low set points.
WARNING
Avoid personal injury or property damage from an uncontrolled process or sudden release of process pressure. Before
starting any adjustments:
D Always wear protective clothing, gloves, and eyewear to avoid personal injury when making adjustments.
D Do not remove the actuator from the valve while the valve is still pressurized.
D Provide some temporary means of process control before taking the pilot out of service.
D Shut off the process pressure line and the supply pressure line, and bleed all of the supply pressure.
D Bleed all process pressure from the pilot so that no pressure is contained in the Bourdon tube.
D When bleeding the supply or process pressure, natural gas, if used as the supply medium, will seep from the unit into
the surrounding atmosphere. Personal injury or property damage may result from fire or explosion if preventative
measures are not taken, such as adequate ventilation and the removal of any ignition sources.
D Use lock‐out procedures to be sure that the above measures stay in effect while you are working on the equipment.
D Check with your process or safety engineer for any additional measures that must be taken to protect against process
media.
Pilots Without Optional Set Point Indication
Preliminary Adjustments
Make sure the following steps have been performed completely before setting either the high or low set point
pressures. Key numbers are shown in figure 8.
1. Refer to the WARNING at the beginning of the Operating Information section. Make sure the Bourdon tube contains
no pressure.
2. Install either a pressure gauge or an optional output indicator in the output pressure line.
3. Remove the cover screws and the cover (keys 6 and 4).
4. Unlock each locking disc (key 69) that holds each set point knob in place. Turn the HIGH SET knob clockwise until it
has reached the end of its travel. Turn the LOW SET knob (key 67) counterclockwise until it has reached the end of
its travel.
WARNING
Before continuing on with step 5, read this Warning:
Natural gas, if used as the supply medium, will seep from the unit into the surrounding atmosphere when the SUPPLY TEST
button is pushed in the next step. Personal injury or property damage may result from fire or explosion if preventative
measures are not taken, such as adequate ventilation and the removal of any ignition sources.
5. Turn on the supply pressure. To check that the supply pressure is turned on, push the SUPPLY TEST button located
in the cleanout assembly (key 54) on the front plate (key 74) until a flow sound is heard.
WARNING
To avoid personal injury or property damage caused by a sudden release of pressure, do not exceed the process pressure
values in table 4.
10
Instruction Manual
D200163X012
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