Rinnai RX Series Installation

KEY POINTS FOR A SUCCESSFUL INSTALLATION
BEFORE PROCEEDING
Read the Installation and Operation Manual
before you proceed.
• Use the Installation Checklist in the Installation and
Operation Manual after completing the installation.
• Refer to the "Water Quality Guidelines" section in the
manual for important water quality information.
• Pay close attention when unpacking the water heater
carton box as the packing includes additional
components.
• Confirm all included parts are located inside the water
heater carton box (refer to the water heater manual
for a full list of parts).
INITIAL SETTINGS
Confirm or change settings of the tankless water heater by
choosing one of the two options below.
Option 1: (Recommended)
Using a Bluetooth®-Capable
Smart Device
1. Supply power to the tankless water heater.
2. Display shows "SEt" and Priority button LED is
blinking.
3. Download and install the Rinnai Central™ app.
4. Open the Rinnai Central™ app from your smart device.
Create an account and log in.
5. Push the Bluetooth button on the controller. The
Bluetooth LED light turns solid.
6. Tap "Connect to a Rinnai Tankless Water Heater" on
the Rinnai Central™ app.
7. Follow the steps in the Rinnai Central™ app to confirm
and/or change your tankless water heater settings.
8. Display will turn off.
9. Tankless water heater setup is complete. Press the
on/off button to turn on the tankless water heater.
Option 2: Using Integrated Controller
1. Supply power to the tankless water heater.
2. Display shows "SEt" and Priority button LED is
blinking.
3. Press the Priority button.
4. Display shows "nG" ( Natural Gas).
5. Toggle between gas types "nG"(Natural Gas) or
"LPG" (Liquid Propane Gas) by pressing the up or
down arrow buttons.
6. Select desired gas type to display.
7. Confirm selection of gas type by pressing the On/Off
button.
8. Display shows "In" (indoor Installation).
9. Toggle between "In" (indoor) and " Out" (outdoor) by
pressing the up or down arrow buttons.
10. Select desired location to display ("In" or " Out").
11. Confirm installation location by pressing On/Off
button.
12. Display flashes desired selections for gas type and
location. Priority button LED also flashing.
13. To restart the selection process, press up arrow
button or press Priority button to confirm gas and
location selections.
14. Display will briefly show "888"and sound a beep.
15. Display will turn off.
16. Initial settings are complete. Press the on/off button to
turn on the tankless water heater.
Bluetooth
button and LED
Priority
button and
LED
See Installation and Operation Manual for
complete description of each controller button.
The Bluetooth® word mark and logos are registered trademarks owned
by Bluetooth SIG, Inc.
U362-0878(01)
100000850
7/2023
ATTENTION: INSTALLING PERSONNEL
(For Indoor Installations Only)
• Ensure vent pipe slopes 1/4" per ft. (21 mm per meter)
toward the water heater.
• Ensure vent system doesn't exceed maximum length
allowed.
• Room air installations: Remove the air inlet cap and
install elbow and vent screen (see below).
Air Inlet Cap
Remove Air Inlet Cap
Refer to the Installation and Operation Manual for
complete details on the above information.
TYPICAL INSTALL
Example Internal
(Indoor) Unit
RECIRCULATION PUMP
RXP199i, RXP160i, CXP199i and CXP160i Models Only
Select the appropriate recirculation mode (Dedicated
or crossover) in the parameter settings.
Dedicated mode (parameter setting 04b):
Crossover mode (parameter setting 04c):
Install crossover valve at the furthest fixture from the
tankless water heater.
NOTE: To remove air,
open a hot water fixture
during pump operation. If
the air is not fully removed,
the pump could run dry.
Maximum Pipe Length (Crossover and Dedicated Mode)
Pipe Diameter
Total
GAS CONVERSION
If converting from NG to
LPG, apply the supplied
Up and Down
arrows gas conversion label at
an open space above
On/Off
the existing label on the
button
left side of the water
heater.
VENTING
Vent Screen
Elbow
Install Elbow and Vent Screen
H C
COLD
HOT
3/4 in. 1/2 in.
400 ft 100 ft
Gas
Conversion
Label
Left Side of
Water Heater
PARAMETER SETTINGS
To adjust the parameters:
1. Press the "A" button for 1 second.
2. Use the up or down button on the integrated controller to
select a setting number (See Parameter Settings Table
below).
3. Once the desired setting number is selected, use the "On/
Off" button on the controller to change the selection for
the setting number.
Example: Display will change from 01A to 01b for
Maximum Temperature setting.
4. To exit the parameters, press the "A" button on the PC
board for 1 second.
0 1 A
2
Parameter Se ngs Table
SETTING SELECTION
SETTING
b
A
# # DESCRIPTION
Residential: Residential:
120°F (49°C)
Maximum Set 140°F (60°C)
0 1
Temperature Commercial: Commercial:
140°F (60°C) 185°F (85°C)
2,001 -
High Altitude
0 - 2,000 ft 5,400 ft
02
(Installation
(0 - 610 m) (610 -
Location)
1,646 m)
03
Service Soon Disabled 0.5 Year
Recirculation No Recirculation Recirculation
04
Settings Recirculation (Dedicated)
Recirculation
05
Economy Comfort
Mode
Air Handler
06
Control Switch BMS
(AH)
Units in Standby
07
2 1
(EZConnect TM )
EZConnect TM /
08
Secondary Primary
Cascade
Units in Standby
09
1 2
(Cascade)
10
Gas Type NG LPG
Built-in Without With
1 2
Pump Setting Pump Pump
Water Heater
Model (Factory 199 180
1 3
Set Values. Not (3237) (2934)
Adjustable)
Internal External
1 4
Indoor/Outdoor
(Indoor) (Outdoor)
Low
1 5
On Off
Activation Mode
1 6
Pump Speed Max High
First Day Pump
1 7
Off On
Operation
Smart-Circ with Smart-Circ is Smart-Circ is
1 8
BLE Button Disabled Enabled
Refer to manual for additional details.
CONDENSATE
The end of the
condensate
drain should be
open to
atmosphere.
DO NOT submerge end DO NOT install an external
of pipe in water. condensate trap.
1
B
A
A
B
3
d
C E F
5,401 - 7,701 -
7,700 ft 10,200 ft
(1,646 - (2,347 -
2,347 m) 3,109 m)
1 Year 2 Years
(Crossover)
Commercial
3 4 5 6
160 130
(2530) (2024)
Medium Low
AIR
GAP