Heated Hose - Graco Reactor E-20 Series Manual

Overtemperature Switch
1. Turn main power OFF
supply.
2. Relieve pressure, page 26.
3. Wait for heaters to cool.
4. Remove heater shroud.
5. Disconnect one leadwire from overtemperature
switch (308), F . 7. Test across switch with ohmme-
IG
ter. Resistance must be approximately 0 ohms.
6. If switch fails test, remove wires and screws. Dis-
card failed switch. Apply thermal compound
110009, install new switch in same location on
housing (301), and secure with screws (311).
Reconnect wires.
If wires need replacement, disconnect from tem-
perature control board. See T
F . 5, page 40.
IG

Heated Hose

Refer to the heated hose manual 309572 for hose
replacement parts.
Check Hose Power Connectors
1. Turn main power OFF
supply.
2. Relieve pressure, page 26.
Whip hose must be connected.
312066ZAD
. Disconnect power
5, page 40 and
ABLE
. Disconnect power
For proportioners with a termination box (TB), fol-
low steps 3 - 5. For proportioners with electrical
splice connectors (12), follow steps 6 - 8.
3. Disconnect power wire harness from terminal block
(TB).
4. Use an ohmmeter to check for continuity between
the two terminals (C, E) on the terminal block.
5. If the hose fails the test, re-test at each length of
hose, including whip hose, until the failure is identi-
fied.
6. Disconnect power wires from power splice connec-
tors (12).
12
z
7. Use an ohmmeter to check for continuity between
the two connectors (12) at (z).
8. If the hose fails the test, re-test at each length of
hose, including whip hose, until the failure is identi-
fied.
Repair
3
4
45