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Flow Switch for DHW Priority (FLWSWTCH) Installation (optional, sold separately)
Installation Notes:
• Makes sure the cable to the fl ow switch isn't under tension.
• Clean the pipe system in which the fl ow switch is to be installed and remove any magnetic
particles, e.g. welding residue.
• The straight in- and outlet pipe (in front of and behind the fl ow switch) has to be at least
2-
1
⁄
" (65 mm).
2
• The fl ow switch should be installed in an "upright standing position" in horizontal pipework.
• The switch should only be installed in a vertical position, deviation max. 45°.
• Make sure that ther are no external magnetic fi elds or large ferromagnetic
bodies in the immediate vicinity of the fl ow switch, since these can impair
device functioning.
• Screw on the union plastic nut with a maximum torque of 8 Nm.
• To prevent overheating when soldering near the fl ow switch, the fl ow switch
(body with paddle system) and the o-ring must be removed from the pipe
section.
Step 1
DHW connectors are
fi ttings, connect the water heater output to the input on the fl ow
switch; and house hot water system to output on fl ow switch.
The straight in- and outlet pipe (in front of and behind the fl ow
switch) has to be at least 2-
Observe fl ow direction when making connections.
Be sure to connect the DHW priority downstream from the panel
(see schematic below).
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Step 2
Turn the panel off . Plug the terminal header of the wiring
harness into the DHW priority contacts of the power box.
®
1
⁄
" FNPT. Using appropriate thread sealant and
2
1
⁄
" (65 mm).
2
FS
FLWSWTCH
DHW Priority Switch
Installation, Operation, and Maintenance
TWH – Tankless Water Heater Panels
Min. 2-
Thermostat
Heating Load
DHW Supply
to House
Terminal Header
of Wiring Harness
max. 45°
1
⁄
" (65 mm)
Min. 2-
1
⁄
" (65 mm)
2
2
15
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Troubleshooting
