Graco FOAM-CAT 200 Series, Instructions And Parts List

Page: 28 / 44

28 308219
Service –
Heater Element
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.
Fig. 17
105
103
102
235A
236A
243
253
254
01296
235B
236B
234
240
Fig. 18 01692
247c
NOTE: Refer to Fig. 17 except where noted.
1. Relieve the pressure, and shut off the main power
to the heater.
2. The heater element wires and sensor probe wires
should already be disconnected since doing the
electrical resistance check. If not, see the proce-
dure on page 20.
3. Connect the control panel cover (216) to the
control box with one screw to keep it out of the
way. See Fig. 20, page 30.
4. Remove the front heater cover (238). See page
39. Disconnect the heating element wire from the
thermostats.
5. Pull the disconnected wires out the bottom. Be
careful not to pull the connectors off the wires.
6. Remove all four nuts (102) and lockwashers (103)
from the side flanges of the heater mounting
bracket (234). See Fig. 17.
7. Lift up slightly on the heater and pull it a few
inches away from the heater mounting bracket.
Lean the top of the heater toward the pump stand
and use a strap wrapped around the control box
and the proportioning pump motor to hold the
heater at an angle of about 4 in. (101 mm) from
the pump stand.
8. Remove the screw (235A) and lockwasher (236A)
from behind the front flange of the manifold.
9. From the back of the heater mounting bracket
(234) remove the top screws (235B) and lock-
washer (236B) only from the side of the heater you
are working on.
10. Push the heater element tube (243) up slightly, tip
the bottom of the tube out and away from the rear
panel, and then pull it away from the heater. Keep
the tube upright to avoid spilling any fluid left in the
tube.
11. If the front heater element is bad, loosen the
adapter (247c) one turn. Refer to Fig. 18. Unscrew
the heater element and pull it out of the tube.
If the rear heater element is bad, unscrew it and
pull it out of the tube.
12. Install a new heater element (254).