Ametek ASR900, Installation And Maintenance Manual

Page: 78 / 92

4-26 | Heated Acid Gas Sample Probe (Large Diameter)
14. Ensure the joining surfaces (flamepath) of the Heater Assembly Cover
and the Heater Block are free of debris. Replace the Cover on the
Heater Block and the (8) M6 x 16 screws that secure the Cover to the
Heater Block.
AMETEK recommends applying a small amount of high-temperature
thread lubricant to the threads. Tighten the screws.
The thread lubricant must not contain copper.
15. Reposition the conduit (North American installations) or cable(s)
(European installations) to the Probe Heater Assembly, reconnect the
field wires, and reassemble the Junction Box (Figure 4-4 and Figure
4-5):
a. Insert the field wires into the Terminal Block tag locations, accord-
ing to your notes or Figure 4-5.
Tighten the screws to secure each wire to the appropriate Terminal
Block tag location in the Junction Box.
b. With the Junction Box o-ring in place on the Junction Box Cover,
thread the Cover onto the Junction Box Body by hand and then
tighten it using a suitable tool. Take care to avoid damaging the
o-ring and the threads.
Tighten the set screw on the end of the Junction Box Cover.
Reconnect the ground to the Junction Box Body using the ground
screw and washer.
c. Tighten the conduit connectors (North American installations) or
cable gland(s) (European installations).
16. If all maintenance on the Heater Assembly is complete, replace and
secure the Heater Assembly on the Sample Probe, as described in the
section “Replacing HAG Probe Parts.”
The procedure is complete.
!
CAUTION