The Grundfos switch is voltage only. I'm not sure I would run it 700 ft or not,
regardless. For that distance I would probably install a float switch in the
discharge tank that shut off the inlet flow and backed water pressure down the
pipe to a pressure switch located close to the pump. As the pressure in the
line
rises the pressure switch will see the increase and signal the pump to stop. A
reverse switch is necessary for the Grundfos SQ signaling.
Be advised in either scenario that we have seen multiple instances of the pumps
continuing to pump when signaled to stop. The only way to definitively make
them
shut off is to use a standard pressure switch and break the circuit between
power source and the pump.
________________________________
From: Kirpal Khalsa <solarwo...@gmail.com>
To: RE-wrenches <re-wrenches@lists.re-wrenches.org>
Sent: Mon, August 23, 2010 3:54:15 PM
Subject: [RE-wrenches] Grundfos SQ Flex Float Switch
Hi All.....I can't find it in any of the manuals for grundfos.....does anyone
know if the wiring to the float switch carries current or not. The float
switch
has 3 #14AWG wires.......I need to add about 700 feet of wire from the CU 200
controller to the storage tank.....I want to use #18AWG......is this okay?
most
float switches I have used do not carry current they are simply signal wires
and
can use very small gauge for long distance.....
Anyone know off the top of their head?
Thanks....
--
Sunny Regards,
Kirpal Khalsa
NABCEP Certified Solar PV Installer
Renewable Energy Systems
www.oregonsolarworks.com
541-218-0201 m
541-592-3958 o
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