Repair Primary Heater - Graco Reactor 3 Repair And Parts Manual

Repair Primary Heater

Replace Heater Element
1. Stop pumps and turn off heat zones.
2. Flush pumps. Follow Flush the Equipment on
page 21.
3. Relieve pressure. Follow the Pressure Relief
Procedure on page 19.
4. Park and shutdown the Reactor. See Shutdown on
page 20.
5. Turn the main power switch (MP) off.
6. Wait for the heater to cool.
7. Remove the heater and RTD wires as needed from
the TCM inside the enclosure and pull the wires
through. See Electrical Schematics on page 69.
NOTE: The RTD should be replaced whenever
replacing the outbound heater rod.
8. Use an ohmmeter to test the heater wires. See
Electrical Schematics on page 69.
9. Disconnect over-temperature switch (214) from the
cable.
10. Loosen ferrule nut (N). See page 40.
11. Remove RTD (212) from the heater housing. Do not
remove adapter (206) unless necessary. If the
adapter must be removed, make sure the mixer
(210†) does not interfere when replacing the
adapter.
3A8501A
MP
12. Disconnect the inlet and outlet hoses from the
heater and from the outlet manifold.
13. Remove two bolts (24) and lift the heater over the
transformer.
14. Place the heater block (201) in a vise. Use a wrench
to remove the heater element (208).
15. Inspect the heater element. It should be relatively
smooth and shiny. Replace the element if there is a
crusted, burnt, ash-like material adhered to the
element, or if the sheath shows pitting marks.
16. Install the new heater element (208) while holding
the mixer (210†) so it does not interfere with the
RTD port.
17. Secure the heater to the frame with bolts (24).
18. Reinstall the RTD (212) in the heater block. See
Replace RTD on page 35.
NOTE: Replace the RTD whenever replacing the
outbound heater rod.
19. Reconnect cable to the over-temperature switches
(214).
20. Reconnect wires in electrical enclosure (2). See
Electrical Schematics on page 69.
Line Voltage
The heater outputs its rated wattage at 240 VAC. Low
line voltage will reduce the power available. When this
occurs, the heater will not perform at full capacity.
24
†
Mixer (210) is visible on page 37.
Repair
203
208
13
213
216
212
206
214
201
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35