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305, 505, 705 Indoor Manual 31
Co n t r o l l er s
Temperature Controller Installation
• The controller should be out of reach of small
children.
• Avoid locations where the controller may become
hot (near the oven or radiant heater).
• Avoid locations in direct sunlight. The digital
display may be difficult to read in direct sunlight.
• Avoid locations where the temperature controller
could be splashed with liquids.
• Do not install in locations where it can be adjusted
by the public.
Configurations
Cable Lengths and Size
The cable for the temperature controller should be a
non-polarized two-core cable with a minimum gauge
of 22 AWG. The maximum cable length from each
controller to the water heater depends on the total
number of wired controllers connected to the water
heater.
Number of Wired
Controllers
Maximum Cable Length for each
Controller to Water Heater
1 328 ft (100 m)
2 164 ft (50 m)
3 or 4 65 ft (20 m)
Location
Wire controllers in parallel
Water
Heater
A maximum of 4 temperature controllers can be
installed for a water heater or bank of water heaters.
Controllers can only be wired in parallel. Controllers
cannot be wired in series.
If 4 temperature controllers are installed,
simultaneously press the Priority and On/Off buttons
on the fourth controller until a beep sounds.
Indoor models have their controller built into the front panel. Additional controllers can also be installed.