Installation Guide

50 Rinnai Tankless Water Heater Installaon and Operaon Manual
4. Use the (Up) and (Down)
buons on the controller to
select a seng number (see
Parameter Sengs Table
below).
Certain elements of the installaon may require adjusng
the parameters of the tankless water heater.
To adjust the parameters:
1. Locate the PC Board (lower right side of unit).
2. Locate the two push buons (A and B) on the PC Board.
3. Press the “A” buon for 1 second.
5. Once the desired seng number is selected, use the
“On/O” buon on the controller to change the
selecon for the seng number.
Example: Display will change from 01A to 01b for
Maximum Temperature seng (as shown below).
6. To exit the parameters, press the “A” buon for 1 second.
SETTING
#
SETTING DESCRIPTION
SELECTION
A c
01
Maximum Set Temperature 120° F 140° F
02
High Altude
(Installaon Locaon)
0 - 2,000 
(0 - 610 m)
2,001 - 5,400 
(610 - 1,646 m)
5,401 - 7,700 
(1,646 - 2,347 m)
7,701 - 10,200 
(2,347 - 3,109 m)
03
Service Soon
1
Disabled 0.5 Year 1 Year 2 Years
04
Recirculaon Sengs
No
Recirculaon
Recirculaon
(Dedicated)
05
Recirculaon Mode
2
Comfort Economy
06
Control Switch BMS
3
Air Handler (AH)
07
Units in Standby (EZ Connect) 2 1
10
Gas Type (Factory Set) NG LPG
11
Maximum Flow Rate
4
Standard High
12
Without Pump With Pump
Water Heater Model
(Factory set values and
not adjustable)
13
199 (3237) 180 (2934) 160 (2530) 130 (2024)
14
Internal (Indoor) External (Outdoor)
1
See secon “3.13 Service Indicator (Service Soon, 55)” for more informaon.
2
Seng 05 is available only if seng 04 is selected.
Comfort mode cycles the pump more frequently, ensuring the loop temperature remains higher (but also uses more
energy). Economy mode cycles the pump less oen, using less energy to maintain the circulaon loop temperature.
3
BMS = Building Management System
4
Selecng “High” will increase the water ow rate to the maximum capacity.
Parameter Sengs Table
DO NOT adjust parameter sengs
unless specically instructed to do so.
WARNING
3.12 Parameter Sengs
Default is A for all sengs below except 10, 12, 13, and 14 which are factory set.
0 1 A
0 1 B
A
B