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MODEL 1000
5.5.3.3
Instructions for Reinstalling the Decoder Board
SERIOUS PERSONAL INJURY OR DEATH POSSIBLE
The upper purged enclosure should not be opened when the unit is exposed to an
explosive environment. If access to the upper purged enclosure is required, precautions
must be taken to ensure that an explosive environment is not present.
Failure to observe all safety precautions could result in serious injury or death.
To replace the Decoder Board, proceed as follows:
(1)
Position the decoder board on the four standoffs.
(2)
Tighten the four captive screws to secure the board in place.
(3)
Attach the wires and plugs that were disconnected while removing the Decoder Board.
(4)
Mount the two nylon spacers on the mounting studs near the center top and bottom of the
Decoder Board.
(5)
Reinstall the two printed circuit boards, such that the component sides of the boards face
outward, left and right (see Figure 5-1). The temperature controller/valve drive board is in
the left slot and the preamp is in the right slot.
(6)
Replace the housing faceplate, making sure that the switch shoulders are inside the locating
holes.
MAINTENANCE
SEP 2005
5-13
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