13. Remove nuts (27) and transformer cover
(8). Cover transformer with plastic sheet or
cardboard.
14. Disconnect overtemperature switches (209) from
cable.
15. Loosen ferrule nut (N). Remove RTD (212) from
heater housing. Do not remove adapter (206)
unless necessary. If adapter must be removed,
ensure that mixer (210) is out of the way when
replacing adapter.
16. Disconnect inlet and outlet fluid tubes from
heater.
17. Remove two bolts (23) and lift heater over
transformer.
18. Place heater block (201) in a vise. Use a wrench
to remove heater element (208).
19. Inspect element. It should be relatively smooth
and shiny. Replace element if there is a crusted,
burnt, ash-like material adhered to element, or
sheath shows pitting marks.
20. Install new heater element (208), holding mixer
(210) so it does not block RTD port.
21. Secure heater to frame with bolts (23).
22. Reinstall RTD (212),
Repair Primary Heater, page 59
.
23. Reconnect cable to overtemperature switches
(209).
24. Reconnect wires to lower din rail. If necessary,
install lower din rail (33).
25. Install lower din rail cover (48).
Line Voltage
The heater outputs its rated wattage at 240 VAC.
Low line voltage will reduce power available and the
heater will not perform at full capacity.
Figure 13
60
333024A
