Physitemp Instruments BFS-30VT - Manual (Page 5)

5. Operating instructions
Ensure that the POWER switch on the rear panel of the controller is in the OFF position.
Check the VOLTAGE SELECTOR switch on the rear panel to ensure that it is set for the
correct line voltage.
Connect the AC power cord supplied with the controller to the mating socket on the rear
of the controller and any suitable grounded AC outlet.
Unless you have a PTU-3 or ECV-1, turn on the water supply and adjust the flow rate so
that, with the return water tube held horizontally over the sink, the stream falls approxi-
mately 3 inches beyond the end of the tubing.
Turn the POWER switch on the rear of the controller ON and ensure that the display on
the front is illuminated.
If you purchased the ECV-1 and have installed it according to the instructions above,
turn on the water supply now and adjust the flow rate as described in Section 4 above. If
you have a PTU-3 check that the neon lamp on the side of the pump is illuminated and
you can hear a low hum from the pump. Check that water is flowing by observation of
movement of air bubbles inside the tubing or, by removing the cap on the tank, the
stream of water from the return tube which is located at the top of the tank underneath
the tubing connections. (See Appendix 2)
In the event that a loud noise is heard from the pump replace the cap on the water reser-
voir and tip the pump housing to an angle of approximately 45 degrees in all directions
for about 15 - 20 seconds. Air is sometimes trapped inside the pump when it is initially
filled and this procedure will release it. It may be necessary to repeat this process if the
tank is ever emptied and refilled. (See Appendix 1)
5