Graco 312066z Manuale Utente
Repair
40
312066Z
Primary Heaters
Heater Element
1.
Turn main power OFF
. Disconnect power
supply.
2.
Relieve pressure, page 23.
3.
Wait for heaters to cool.
4.
Remove heater shroud.
5.
See F
IG
. 6. Disconnect heater element wires from
heater wire connector. Test with ohmmeter.
6.
To remove heater element, first remove thermocou-
ple (310) to avoid damage, see step 7, page 42.
ple (310) to avoid damage, see step 7, page 42.
7.
Remove heater element (307) from housing (301).
Be careful not to spill any fluid left in housing.
Be careful not to spill any fluid left in housing.
8.
Inspect element. It should be relatively smooth and
shiny. If there is a crusted, burnt, ash-like material
adhered to element or sheath shows pitting marks,
replace element.
shiny. If there is a crusted, burnt, ash-like material
adhered to element or sheath shows pitting marks,
replace element.
9.
Install new heater element (307), holding mixer
(309) so it does not block thermocouple port (P).
(309) so it does not block thermocouple port (P).
10. Reinstall thermocouple, page 42.
11. Reconnect heater element leadwires to heater wire
connector.
12. Replace heater shroud.
Line Voltage
The primary heaters output their rated wattage at 230
Vac. Low line voltage will reduce power available and
the heaters will not perform at full capability.
Vac. Low line voltage will reduce power available and
the heaters will not perform at full capability.
Total Heater
Wattage
Element
Ohms
6,000
1500
30-35
7,650
2550
18-21
10,200
2550
18-21