B&C Technologies IM Series Industrial Ironer - Manual (Page 36)

10. PS3 (Pressure Switch 3) - This normally closed switch is connected to the outlet of the boiler.
It protects the chests and transfer plates from excessive pressure and helps to confirm oil
flow through the system. On some machines there is an isolation valve feeding this pressure
switch branch line if present this valve should never be closed.
11. PS4 (Pressure Switch 4) - This is an optional normally closed pressure switch that goes open
in the event of excessive system pressure. This switch must be manually reset and if tripped
will lock out operation of the heat source.
12. Valve D (Bleed Valve) - This valve allows purging air or other gases from the thermal fluid
system. It should always be kept closed during operation.
13. Valve E (Fill Valve) - This valve is located close to the pump inlet. This valve is used to fill
or drain fluid from the system. It should always be kept closed during operation.
14. Valve F - This is the high pressure gauge line valve. If this valve is present it must be kept
open. Remove the handle from this valve at commissioning to prevent accidental closure.
15. Valve G - This is the low pressure gauge line valve. If this valve is present it must be kept
open. Remove the handle from this valve at commissioning to prevent accidental closure.
3.10.2 Filling the System
This procedure details the recommended process for filling the thermal fluid system and should
be followed when commissioning a new machine or refilling the machine with fluid after service,
or filling the system with cleaner (which is available from your thermal fluid supplier). Do not
attempt to service the thermal fluid system unless you are properly trained and completely under-
stand the operation of the machine. If there are any questions consult your distributor or the B&C
Technologies Technical Service Department. For reference, see the system diagram in figure 3.7
on page 28. Perform this procedure with the Rolls in the raised position.
1. NEVER OPERATE THE THERMAL FLUID PUMP DRY!! Before filling the machine re-
move the seal weep hole in the thermal fluid pump and fill it with thermal fluid as described
in the pump manual (see the appendix for details). Operating the pump with dry seals for
only a few seconds will permanently damage the seals and is not covered under any war-
ranty.
2. If commissioning a new machine, the system filter screen should be opened and cleaned
before proceeding with the fill.
3. Make certain (check twice!) that the fluid expansion tank is clean and free of debris or water.
Make certain (check twice!) that the fluid being used for filling is new, clean and contains no
water. If filling from a previously opened drum, pump a gallon or so from the bottom of the
drum into a clean bucket and look for water, rust, or other contamination. See the appendix
for information about proper drum storage.
4. Connect a properly sized hose barb to outlet of valve E. Connect the fill hose from the barrel
pump to this point and secure it to the barb with a hose clamp.
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