Brookfield Bath, Model TC-101 - Manual (Page 6)

2.4 Fluid Connections
The pump inlet and outlet are threaded with female 1 /
4
inch NPT to allow use of barbed tubing adapters or
hard plumbing.
Select tubing and fittings that are compatible with bath fluid and temperature range. If the pump inlet and
outlet are not used for external circulation, connect the inlet and outlet pipes with a short length of insulated
tubing. Or, plug the pipes with male nylon plugs (supplied) or with metal plugs (not supplied) for high
temperature use.
The nylon barbed tubing adapter fittings supplied are for applications from -20° to 93°C. Brass,
stainless steel or Teflon® fittings are recommended for applications above 93°C. Quick connectors are
not recommended as they restrict flow rate.
Some programmable models are not equipped with a refrigeration system. For operation of these non-
refrigerated models, the included cooling coil may be used to achieve bath temperatures within 15°C above
the ambient room temperature. The cooling coil also permits the bath temperature to be lowered more
rapidly, after operation at an elevated temperature. The cooling coil connections are located between the
circulating pump’s inlet and outlet connections at the rear of the bath’s controller. To use the cooling coil, slide
the
1
/
4
in. ID latex tubing from the water source over one of the coil’s connections and route another length of
tubing from the other coil connection to the drain.
2.5 Pump
A pressure & suction (DUPLEX) pump is built into each unit. The 5-speed DUPLEX pump is found in all
programmable controller circulators. It may be used for direct immersion of samples, closed loop circulation,
or circulating to an open bath. Speed selection is in the
FUNCTION TUNING menu. (See Section 3.2)
Note: When reducing the speed of a duplex pump, there may be a faint sound that is synchronous with the
flashing of the POWER light. The sounds are the pulses coming from the motor speed controller and are
normal.
MAXIMUM OUTLET RATINGS
PUMP SELECTION SPEED PUMP TYPE 120V, 60Hz
1 = FULL 24 lpm / 5 psi
2 = HIGH 17.5 lpm / 2 psi
3 = MEDIUM 13.5 lpm / 1 psi
4 = LOW 12.5 lpm / 0.8 psi
5 = SLOW 11 lpm / 0.5 psi
The table uses the following criteria:
1. Maximum pump outlet flow rate is measured with no restriction on the pump outlet.
2. Maximum pump outlet pressure is measured in pounds per square inch (psi) at no flow.
3. The figures above were measured with water as the circulation fluid. Water has a viscosity of one
centistoke. High viscosity, low density fluid will reduce these figures.
4. Duplex pump suction inlet vacuum ratings are 75 percent of the outlet ratings shown.
5. When inlet and outlet are plugged, flow rate refers to internal bath circulation.
6. For 50Hz operation derate 60Hz values by 17%.
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