Installa On Of Temperature Controller - Rinnai RL75i Installation And Operation Manual

Installa on of Temperature Controller

WARNING
Turn the power off. Do not a empt to connect the
temperature controller(s) with the power on.
Although the controller is a low voltage device, there
is 120 volt poten al next to the temperature
controller connec ons inside the unit.
Do not connect the temperature controller to the
120VAC terminals provided for the op onal solenoid
drain valves.
Indoor models have their controller built into the
front panel. Addi onal controllers can be installed.
Controller Loca on
The controller should be out of reach of small
children.
Avoid loca ons where the controller may become
hot (near an oven or radiant heater).
Avoid loca ons in direct sunlight. The digital
display may be difficult to read in direct sunlight.
Avoid loca ons where the temperature controller
could be splashed with liquids.
Do not install in loca ons where the controller
can be adjusted by the public.
Cable Lengths and Sizes
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 Maximum Cable Length for each
Controllers
1
2
3 or 4*
* Only 3 addi onal controllers can be wired to the
indoor water heater.
22
Controller to Water Heater
328 (100 m)
164 (50 m)
65 (20 m)
Configura ons
A maximum of 4 temperature controllers can be
installed for a water heater or bank of water heaters.
This includes the controller built into an indoor water
heater. Controllers can only be wired in parallel.
Controllers cannot be wired in series.
Rinnai
Water
Heater
The 4 temperature controllers can consist of mul ple
MC-91-2 or MCC-91-2 but only one BC-100V and only
one MC-100V.
(MC-91-1 should not be installed on a unit that
already has an MC-91-2 connected)
The clock func on on the BC-100V will only be
available if an MC-100V is also connected.
If 4 MC-91-2's are installed, simultaneously press the
Priority and On/Off bu ons on the fourth controller
un l a beep sounds.
VC Series Manual
Maximum 4 Controllers
Wire controllers in parallel