Emerson B-106-300NH instruction manual Service and Normal Maintenance

Instruction Manual

Appendix B Rev. 2.2 January 1997

World Class 3000

SERVICE AND NORMAL MAINTENANCE

B-5	OVERVIEW
	This section describes service and routine
	maintenance of the HPS 3000 Heater Power
	Supply Field Module. Replacement parts re-
	ferred to are available from Rosemount. Refer to
	Table B-2of this manual for part numbers and
	ordering information.
	Install all protective equipment covers
	and safety ground leads after equip-	B-8
	ment repair or service. Failure to in-
	stall covers and ground leads could
	result in serious injury or death.
B-6	FUSE REPLACEMENT

The heater power supply mother board (12, Figure B-7) contains four identical 5 amp fuses. Refer to Table B-1for replacement fuse specifi- cations. To check or replace a fuse, simply un- screw the top of the fuseholder with a flat head screwdriver and remove fuse. After checking or replacing a fuse, reinstall fuseholder top.

B-7 TRANSFORMER REPLACEMENT

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.

a.Turn off power to system.

b.Loosen captive screws retaining HPS cover. Remove cover.

c.Remove hex nut (25, Figure B-7)from top of transformer assembly. Remove retaining plate (24) and gasket (22).

d.Disconnect transformer harness plug from mother board.

e.Remove old transformer. Place new trans- former in position and reconnect harness plug as noted in step d.

f.Place gasket and retaining plate on trans- former.

g.Tighten hex nut only enough to firmly hold transformer in place.

h.Reinstall HPS cover.

MOTHER BOARD REPLACEMENT

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.

a.Turn off power to system.

b.Loosen captive screws retaining HPS cover. Remove cover.

c.Remove hex nut (25, Figure B-7)from top of transformer assembly. Remove retaining plate (24) and gasket (22).

d.Disconnect transformer harness plug from mother board.

e.Remove screws on either side of terminal strip covers (2). Remove terminal strip cov- ers (4 and 8).

f.Unplug ribbon cable from the receptacle on the daughter board (7).

g.Unscrew stand offs on either side of the daughter board. Remove daughter board

(7).

h.Unscrew four stand offs that supported the daughter board.

B-8 Appendices Rosemount Analytical Inc. A Division of Emerson Process Management