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308219
Service –
Triac, Hi-Limit Thermostat
WARNING
To reduce the risk of serious injury, including burns
from hot fluid or hot metal; fluid injection; or electric
shock:
1.
Cool the fluid in the heater by
pumping unheated fluid through it for
two minutes before removing the
front heater panel (238).
2.
Follow the
Pressure Relief Proce-
dure
on page 6 before checking or
adjusting any part of the system or
any component and whenever you
are instructed to relieve pressure.
3.
Disconnect the main electrical power
to the heater before removing any
heater panels.
Replacing the Triac
1.
Relieve the pressure, and shut off the main power
to the heater.
2.
The triac leads should be disconnected if you
performed the
Electrical Resistance
check. If not,
see the procedure on page 24.
3.
Remove the screws (292 or 337), lockwashers
(291 or 336) and the triac (281 or 306a).
4.
Apply conductive paste
(order Graco P/N 110009)
to the bottom flange of the new triac. Position the
triac as shown in Fig. 13.
5.
Reconnect the leads firmly to the triac. See the
DETAIL in Fig. 13.
6.
Reinstall the control panel cover.
Fig. 13
Large
Black
Wire
Large
White
Wire
Small
White
Wire
216 or 317
DETAIL
292 or 337
291 or 336
281 or 306a
01696
Summary of Contents for FOAM-CAT 200 Series
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