Removing The Transmitter Unit Top - Honeywell Apex Technical Handbook

MAN0604_Issue 09_02-2013
2110M8030
Note: The board is supplied with the mounting pillars fitted to it.
This procedure describes how to:
• remove the Transmitter Unit top
• remove the Main PCB assembly from the top
• fit the LonWorks Communication Board to the Main PCB
• refit the Main PCB assembly into the top
• connect the LonWorks network wiring
• refit the Transmitter Unit top
• operational check and binding the LonWorks Communication Board to
the network
Refer to the General Installation Guidelines at the beginning of this chapter.

3.3.1 Removing the Transmitter Unit top

Cautions:
1. Observe precautions for handling electrostatic discharge sensitive devices.
2. Ensure that the Apex Transmitter Unit flamepath is not damaged during this procedure.
The flamepath is formed by the mating surfaces of the Apex Transmitter Unit top and
base (see diagram).
(1) Isolate all associated power supplies and ensure that they remain OFF during this procedure.
Ensure a gas free atmosphere.
(2) Disconnect from the Transmitter Unit base the wire retaining cable fitted between the top and
the base.
Unscrew and remove the single M6 hexagon screw that secures the cable to the base.
Unit top
Top retaining
cable
Flamepath
Locating
pins
Cable securing
screw
External
earth
Unit base
Cable entry sealing plug
3. inSTAllATiOn
Cable / conduit
ZIF
entry (2 off)
Ribbon cable
Interconnect
PCB
Flamepath
Captive bolt
(3 off)
Certified
Sensor mounting
point
39
Apex