Graco Therm-O-Flow 20, Инструкция - Каталог запасных частей

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Operation
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Changing Empty Pails
1. Stop the pump by closing either the bleed-type mas-
ter air valve or the fluid dispensing valve.
2. To raise the ram out of the pail, set the ram control
lever to UP. F
IG
. 4, page 14. At the same time, care-
fully equalize the pressure in the pail by using the
Follower Blow-off Valve Regulator to cycle the fol-
lower blow-off valve open and close.
3. When the follower plate wipers clear the rim of the
pail (i.e., when pressure under the plate is relieved),
set the ram UP air regulator to 15-20 psi (103-138
kPa, 1-1.4 bar) to allow the ram to lift the plate to its
most upright position.
4. Being careful not to damage the follower wiper or
touch hot material, scrape material from the follower
plate and wiper.
5. Follow Loading Material procedure, page 13-13,
steps 1-6, except step 3 (lubricate the wiper).
6. Turn air on to the pump, and set the pump air regu-
lator for normal operation.
Shutdown
1. Turn the CONTROL switch (65) to OFF. F
IG
. 5, page
17.
2. Turn OFF the main electrical disconnect.
3. Set the ram control lever to OFF. F
IG
. 4, page 14.
4. Shut off the air supply to the ram and pump.
6. Remove the dispense device and clean as
instructed in its manual.
Emergency Stop
1. On the electrical control panel:
a. Turn OFF the main electrical disconnect.
b. Turn the CONTROL switch (65) to OFF. F
IG
. 5,
page 17.
2. Close the Bleed-type Master Air Valve (C), closest
to the motor's air inlet, to stop the pump. See F
IG
. 1,
page 6.
3. To stop the ram:
a. Close the ram air lock-out valve.
b. Set the ram control lever to OFF. F
IG
. 4, page
14.
CAUTION
• To avoid damaging pumps, do not operate when
pails are empty.
• Do not raise the ram and remove the follower plate
from the pail until you are ready to immediately
install a new pail, unless you are preparing to ser-
vice the equipment.
WARNING
Due to material viscosity, you can only change pails
when the unit is at full operating temperature.
•
Avoid contact with hot material and equipment
surfaces.
• Wear protective clothing.
• Read warnings, pages 4-5.
WARNING
Improperly adjusted blow-off pressure can cause seri-
ous injury or damage equipment.
•
Excessive pressure - follower plate may rise too
quickly or pail may burst.
• Too little pressure - ram may lift pail off the ground.
WARNING
5. Follow Pressure Relief Procedure, page 14.