Emerson B-106-300NH instruction manual Solenoid Valve Replacement

World Class 3000

Instruction Manual

Appendix D Rev. 2.4 July 1998

SERVICE AND NORMAL MAINTENANCE

D-5 OVERVIEW

This section describes service and routine maintenance of the MPS 3000 Multiprobe Cali- bration Gas Sequencer. Replacement parts re- ferred to are available from Rosemount. Refer to Table D-3for part numbers and ordering information.

Install all protective equipment covers and safety ground leads after equip- ment repair or service. Failure to in- stall covers and ground leads could result in serious injury or death.

D-6 FUSE REPLACEMENT

Power supply (58, Figure D-6)contains two identical 1 amp fuses (3). Perform the following procedure to check or replace a fuse.

Disconnect and lock out power before working on any electrical components.

e.Remove two screws (39) and washers (38) holding the terminal cover (37). Remove the terminal cover.

f.Tag and remove wires from terminals 1 and 4 or 5 of the transformer in the power supply (58).

g.Remove two nuts (60) and washers (59) from the screws holding the power supply (58). Remove the power supply.

h.Mount the new power supply onto the screws with two nuts (60) and washers (59).

Make sure the ground wires are connected	D
to the upper mounting screw.

i.Reconnect the wires removed in step f.

j.Install the terminal cover (37) with two screws (38) and washers (39).

k.Connect the 24V connector to J11 on the termination board (34).

l.Close and secure the inner cover (16) with two captive screws. Close and secure the outer cover (15) with two captive screws.

a.Turn off power to the system.

b.Unscrew top of fuseholder (40) and remove the fuse. Refer to Table D-3for replacement fuse specifications. After checking or re- placing a fuse, reinstall top of fuseholder.

D-8 SOLENOID VALVE REPLACEMENT

An MPS 3000 will always have a HI GAS sole- noid (63, Figure D-6)and a LOW GAS solenoid

(64)mounted to the manifold (11). Each probe will also have a solenoid valve (9) mounted on the manifold.

D-7 POWER SUPPLY REPLACEMENT

Disconnect and lock out power before working on any electrical components.

a.Turn off power to the system.

b.Loosen two captive screws holding the MPS cover (15, Figure D-6). Open the MPS cover.

c.Loosen two captive screws holding the inner cover (16). Lower the inner cover.

d.Disconnect the 24V connector from J11 on the termination board (34).

Disconnect and lock out power before working on any electrical components.

a.Turn off power to the system.

b.Loosen two captive screws holding the MPS cover (15, Figure D-6). Open the MPS cover.

c.Loosen two captive screws holding the inner cover (16). Lower the inner cover.

d.Disconnect the HI GAS (J17), LOW GAS (J18), or Probe (J13-J16) plug from its re- ceptacle on the termination board (34).

Rosemount Analytical Inc. A Division of Emerson Process Management Appendices D-7