10
The controller has a shipping weight of about 8 lbs.
NOTE: EXCESSIVE HEAT AND/OR DIRECT SUNLIGHT EXPOSURE WILL DARKEN THE
LCD DISPLAY SCREEN, MAKING IT DIFFICULT TO READ, AND MAY SHORTEN THE LIFE
OF OTHER ELECTRONIC COMPONENTS.
7
Plumbing Installation
PLUMBING MATERIALS
Inlet plumbing can be ¾ inch (1.9 cm) PVC, CPVC, or iron pipe.
Provide at least 1 gpm (3.79 Lpm) to the sensor. A 4-psi (0.3 bar) differential pressure from take-off
to injection is sufficient. If flow is marginal, consult your Pulsafeeder Factory Representative. The
maximum recommended flow is 5 gpm (18.93Lpm).
Outlet plumbing can be ¾ inch (1.9 cm) PVC, CPVC, or iron pipe. PVC, CPVC Schedule 80 is
recommended for strength and sunlight protection.
If iron pipe is used, install a PVC union to relieve the stress on the plumbing.
The sample line inlet should be plumbed downstream of the recirculating pump and upstream of the
heat exchanger. This line brings the sample water into the sensor plumbing for conductivity
measurement. If the Pulsafeeder flow switch plumbing assembly is used, this flow of water also
pushes the flow switch float up to activate the relay outputs of the controller.
NOTE: FOR YOUR CONVENIENCE, INCLUDE A
PULSAFEEDER MODEL 9102 SAMPLE LINE
SHUT-OFF VALVE AND A SAMPLE VALVE
SPOUT (AS SHOWN) IN THE INLET FLOW
PLUMBING.
Figure 1:
Model 9102 Valve &
Spout
The sample line outlet flow (solution/sample line) should be plumbed to the tower return line or the
tower basin, where you can insert your chemical feed system. Refer to the suggested installation
drawing in the back of this manual for an example of a typical installation.
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