Replacement Procedures - ABB Endura AZ40 Manual

8 Replacement procedures

8.1 Flange block cartridge heaters (100 W)
Referring to Fig. 8.1:
1. Use a small flat-bladed screwdriver to depress the spring
connectors at terminal numbers 1, 2 and 3 and disconnect
100 W flange block cartridge heater wires from top terminal
block connectors A.
2. Pull cartridge heater wires up through (left) opening B
in flange block C.
3. Use a small flat-headed screwdriver to unscrew cartridge
heater retaining screws D and remove cartridge heater
retainers E in 4 positions (F HTR1, G HTR2,
H HTR3 and I HTR4). Retain items for re-use.
IMPORTANT (NOTE)
When refitting cartridge heater retainers, refit them
ONLY in their original fitted position.
4. Withdraw each cartridge heater J from its chamber in
flange block C. If seized, rotate the cartridge heaters
to loosen them.
5. Slide one new cartridge heater into each cartridge heater
chamber at positions (F HTR1, G HTR2, H HTR3 and
I HTR4).
IMPORTANT (NOTE)
The cartridge heater retainer at position I also
retains flange block thermocouple T/C 2. Use only
the cartridge heater retainer previously fitted at this
position.
6. Apply a small amount of anti-seize compound (suitable for
temperatures up to 200 °C [392 °F]) to the thread of each
cartridge heater retainer screw (D) and use a small
flat-headed screwdriver to secure each cartridge heater
retainer (E) to its original position on flange block C.
7. Feed all flange block heater wires down through left
opening B in flange block C and make terminal block
connections at the top terminal connectors A as follows:
— connect one wire from each cartridge heater to
terminal 1.
— connect the free wire from cartridge heaters F (HTR1)
and G (HTR2) to terminal 2.
— Connect the free wire from cartridge heater H (HTR3)
and I (HTR4) to terminal 3.
8. To replace 70 W CO heater block cartridge heaters, refer
to Section 8.2, page 10.
9. Refit sensor covers – refer to Section 7.2, page 8.
Wire color
Orange
White / Orange
White
H
Fig. 8.1 Replacing flange block cartridge heaters (100 W)
Endura AZ40 | Sensor assembly | Heater and thermocouple kit | INS/ANAINST/008-EN Rev. B
A
1 1 2 2 3 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Terminal no. Cable type
1
2 Power
3
J
F
Connection
FLBK HTR 1-4
FLBK HTR 1-2
FLBK HTR 3-4
E
D
G
I
9