Temperature Controller Installation Location; Configurations; Cable Lengths And Size - State Water Heaters Tankless On-Demand 705 Series 200 Operation And Installation Manual

Direct vent tankless water heater
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Temperature Controller Installation
Location
Indoor models have their controller built into the front panel. Additional controllers can also be installed.
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.

Configurations

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.

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.
Avoid locations where the temperature controller
could be splashed with liquids.
Do not install in locations where it can be adjusted
by the public.
Water
Heater
Number of Wired
Controllers
305, 505, 705 Indoor Manual
Wire controllers in parallel
Maximum Cable Length for each
Controller to Water Heater
1
2
3 or 4
Controllers
328 ft (100 m)
164 ft (50 m)
65 ft (20 m)
31

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