Primary Heater - Graco Reactor A-20 Repair Parts

Primary Heater

Read Warnings on page 4. Wait for heater to cool be-
fore repairing.
1. Turn Main disconnect Switch OFF.
2. Perform Pressure Relief Procedure; see page 7.
3. Wait for heater to cool.
4. Perform Flushing procedure; see page 7.
5. Remove both rear shrouds and lower front shroud;
see page 12.
Removal
1. Disconnect two fluid lines at bottom of heater.
2. Disconnect two upper fluid lines at the connection to
the recirculation manifold. Leave tubing assemblies
connected to heater.
311512A
3. Follow brown thermocouple wire up to hose heat
temperature control and disconnect. See Wiring on
page 35.
4. Disconnect over pressure switches.
a. Loosen retaining screw.
b. Unplug connector front and back.
5. Disconnect two main power leads from wire harness
at heater assembly terminal blocks.
6. Disconnect two wires from over temperature switch.
7. Remove back screw holding wiring bracket to heater
shelf. Retain screw.
8. Remove four screws underneath heater. Retain four
thermal barrier spacers for later installation.
9. Pull heater assembly out and remove from unit.
Service
See parts breakdown on page 34 for servicing.
Installation
Reconnect and install in reverse order.
ti8484a
Repair
17