Unit installation

WATER FLOW SWITCH INSTALLATION

Plumb the optional water FLOW switch externally on the water

"in" piping. Position the flow switch on the water "in" line so it

only detects the water flow through the unit itself.

Remove the existing leads from the water PRESSURE switch.

Then connect them to an insulated two pair cable with 14 to 12

gauge wire.

Run the cable from the flow switch to the inside of the units cabi-

net and wire accordingly. Make sure all connections are water

tight. Use the proper slip connectors. Leave the existing water

pressure switch in place or remove and replace with a 1/4 inch

machine threaded "copper" or "p.v.c." plug. Use teflon tape and

pipe sealer.

Start the circulation pump and heater. Adjust the set screw

counter

clockwise until the unit shuts off. Then turn the set screw clock-

wise until the unit starts, then add three more turns clockwise.

Test run all equipment that may slow the water flow and readjust

as needed. Make sure the heater shuts off when the circulation

pump does.

Gauge

In most cases the existing water pressure switch located

inside the access compartment can be changed to this spe-

cial use water pressure switch. This water pressure switch

can be set at a higher rating to offset the static pressure in

some cases. The factory part number is #408. Install this

switch in place of the existing water pressure switch when

needed. If it does not solve the static pressure problem then

use the optional Grid™ flow switch. The factory part num-

ber is #888-032.

See "Water Pressure Switch" for more information re-

garding the water pressure switch.