Plumbing Requirements - Thermo Scientific NESLAB EX Series Installation, Operation And Maintanance Manual

Plumbing Requirements

Ensure the unit is off before connecting tubing to the unit.
To prevent damage to the plumbing lines, always support the
fittings while installing/removing the pumping caps and lines.
Hose Connections
The pump connections are located at the rear of the pump box and are labelled
(pump outlet) and (pump inlet). These connections are bent upward
so the recirculating fluid will drain back into the reservoir when the hoses are
disconnected. Both connections are capped with stainless steel serrated plugs.
The pump lines have ¼" MPT for mating with standard plumbing fittings. For
your convenience stainless steel adapters, ¼" FPT to 3 / " O.D. serrated fitting,
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are provided. (To assure proper fit, they should be installed using 1½ turns of
Teflon ® tape around the threads.)
Make sure all tubing connections are securely clamped. Avoid running
tubing near radiators, hot water pipes, etc. If substantial lengths of tubing
are necessary, insulation may be required to prevent loss of cooling capacity.
Tubing and insulation are available from Thermo Fisher. Contact our Sales
Department for more information (see Preface, After-sale Support).
It is important to keep the distance between the unit and the external system
as short as possible, and to use the largest diameter tubing practical. Tubing
should be straight and without bends. If diameter reductions must be made,
make them at the inlet and outlet of the external system, not at the unit.
If substantial lengths of lines are required, they should be pre-filled with bath
fluid before connecting them to the unit. This will ensure that an adequate
amount of fluid will be in the bath once it is in operation.
Drain
Ensure the bath fluid is at a safe handling temperature before draining
the unit.
The unit is equipped with a drain located at the back of the unit labelled .
To drain the reservoir attach a hose to the barb and loosen the fitting. The
fitting has a stop to prevent it from coming off.
Pumping
The pump is designed to deliver a flow of 15 liters per minute (4 gallons per
minute) at 0 feet head. To prevent external circulation, the pump inlet and
outlet lines on the rear of the unit are capped. The caps must be removed when
external circulation is required.
To properly secure external hose connections to the unit, wrap Teflon ® tape
around the pipe line threads before installation. Once the hose connections are
made, the hoses must be properly plumbed to an external system. It is
important the bath is not in operation until all plumbing is complete.
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