Installation Sheet

54 Rinnai Tankless Water Heater Installaon and Operaon Manual
Parameter Sengs Table
SETTING
#
SETTING
DESCRIPTION
SELECTION
A c E F
01
Maximum Set
Temperature
140° F 185° 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
08
Cascade Secondary Primary
09
Units in Standby
(Cascade)
4
1 2 3 4 5 6
10
Gas Type
(Factory Set)
NG LPG
11
Maximum Flow Rate
5
Standard High
12
Commercial
without Pump (CU)
Water Heater Model
(Factory set values
and not adjustable)
13
CU199
(REU-N3237)
CU160
(REU-N2530)
14
Internal
(Indoor)
External
(Outdoor)
Default is A for all sengs below except 10, 12, 13, and 14 which are factory set.
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
Seng 09 is available only if seng 08 is selected.
5
Selecng “High” will increase the water ow rate to the maximum capacity.
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.
DO NOT adjust parameter sengs
unless specically instructed to do so.
WARNING
3.12 Parameter Sengs
A
B
0 1 A
0 1 B