B&C Technologies IM Series Industrial Ironer - Manual (Page 35)

3.10 Thermal Fluid Connection & Filling
3.10.1 Thermal Fluid Familiarization
Refer to the system diagrams on pages 28 and 29 for details on item nomenclature.
1. Thermal Fluid - The thermal fluid used is either Paratherm HE, Shell Thermia B, or an equiv-
alent Fluid. Also referred to as ”thermal oil”, ”heat transfer fluid”. Formulations vary with
different suppliers, but in general these fluids are not highly hazardous. See Appendix for
detailed information and MSDS.
2. Insulation - In some locations in the machine fiberglass based insulation is used. If any of
this insulation becomes soaked with thermal fluid it is important to remove, properly dispose
of, and replace with new insulation as soon as possible. Thermal fluid soaked fiberglass can
generate spontaneous combustion fires like oily rags in a dryer.
3. Valve A (Expansion Tank Valve) - This valve blocks the flow of thermal fluid to and from
the expansion tank. It should NEVER BE CLOSED during operation for any reason. Closing
it can cause severe damage to your flatwork ironer and/or severe personal injury.
4. Valve B (Pump inlet cut-off valve) – This valve is used for servicing the thermal fluid pump,
filter screen, or drying out the thermal fluid tank and should never be closed during normal
operation.
5. Valve C (Pump outlet cut-off valve) - This valve is used for servicing the thermal fluid pump
or filter screen and should never be closed during normal operation.
6. Filter Screen - This is a trap for particulate matter in the oil circulation system. When the
ironer is new, it is normal to find a small amount of foreign material in the screen. As the
ironer ages, pieces of carbon may be found. This indicates that the system needs to be cleaned
with a special solvent. Contact your thermal fluid supplier for a solvent and cleaning proce-
dure.
7. Thermal Fluid Pump - This pump moves the fluid around the system and is a high perfor-
mance precision pump. Note that there is a weep hole under drive shaft at the end of the
pump body. In normal operation there should not be a significant amount of fluid coming
from this hole. Never plug this hole. Weeping fluid indicates the need for new seals in the
pump. See the thermal pump manual in the Appendix for more information.
8. Thermal Fluid Boiler - Although commonly called a boiler, the boiler is actually a high
efficiency heat exchanger. It transfers the heat from the burner into the thermal fluid.
9. PS2 (Pressure Switch 2) - This normally open switch is connected to the inlet of the boiler.
It goes closed when the inlet pressure reaches a pressure setting to confirm operation of the
pump. On some machines there is an isolation valve feeding this pressure switch branch line
if present this valve should never be closed.
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