Installation Guide
96 Rinnai Tankless Water Heater Installation and Operation Manual
Number of
Wired
Controllers
Maximum Cable Length
for Each Controller to
Water Heater
1 328 ft (100 m)
2 164 ft (50 m)
3 65 ft (20 m)
Cable Lengths and Sizes
The temperature controller cable should be a
non- polarized two-core cable with a minimum
gauge of 22 AWG. The maximum cable length
from each temperature controller to the water
heater depends on the total number of wired
controllers connected to the water heater.
All Rinnai Tankless Water Heaters are equipped with an integrated digital temperature controller that
allows for a precise water temperature set- point. Additional digital temperature controllers are
available as accessories and must be purchased separately (detailed installation steps included with
purchase).
Wiring
A maximum of four temperature controllers can be installed for a water heater or bank of water
heaters; this includes the controller built into a Rinnai Tankless Water Heater. Controllers can only
be wired in parallel; they cannot be wired in series.
Location
•
The temperature controller should be out of reach of small children.
•
Avoid locations where the temperature controller may become hot (near an 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 the temperature controller can be adjusted by the public.
•
DO NOT install the MC-195T-US Timer/Controller and Wi-Fi Module together as they are
not compatible accessories.
•
SmartCirc™ is not available with the use of MC195T or Wi-Fi module.
IMPORTANT
Table 39
Connect controller cable to
mating terminal at middle right
side of PC Board.
Wi-Fi Module
Figure 108
Wiring illustration (Detailed
wiring instructions included with
temperature controller package)
Figure 107
OR
Four
Temperature
Controllers
Rinnai
Rinnai
Rinnai
Enlarged view
of controller
Rinnai
Rinnai
Rinnai
Rinnai
Temperature Controllers
Rinnai
Rinnai
Rinnai