Reversing Action - Emerson Fisher 2502 Instruction Manual

2502 Controllers
June 2017
4. Install each bellows by screwing it down over the stud (key 97, not shown) protruding from each end of the spacer.
Secure with a bellows frame screw, and install the relay according to the Changing Relay section.
5. Perform the calibration procedure and any other necessary part of the calibration sequence.

Reversing Action

Note
The following procedure will be necessary to restore previous action if the mounting method has been changed. Key numbers are
shown in figure 14.
1. Remove two screws (keys 63 and 64), two seal rings (key 55), and the nozzle block (key 101). Check seal ring
condition and replace rings as necessary.
2. Install the nozzle block, seal rings, and screws on the opposite side of the beam as shown in figure 13. Disconnect
the proportional band tubing (key 76) and one of the two pieces of reset tubing (key 75) from the bellows frame
(key 94) and reconnect them in the proper orientation as shown in figure 13.
Figure 13. Nozzle, Flapper, and Tubing Arrangements for Various Actions and Mountings
SEAL SCREW
FLAPPER
HOOK
SEAL SCREW
PROPORTIONAL
TUBING
RESET
TUBING
TO RELAY
DIRECT ACTING—RIGHT HAND MOUNTING
REVERSE ACTING—LEFT HAND MOUNTING
AV2323‐A
AV2322‐A
B0995‐2
28
SEAL SCREW RINGS
RESET
VALVE
TO PROPORTIONAL
VALVE
SEAL SCREW
RING
FLAPPER
HOOK
SEAL
SCREW
RING
RESET
TUBING
PROPORTIONAL
TUBING
TO RELAY
REVERSE ACTING—RIGHT HAND MOUNTING
DIRECT ACTING—LEFT HAND MOUNTING
Instruction Manual
D200126X012
SEAL SCREWS
RESET
VALVE
TO
PROPORTIONAL
VALVE