Rinnai REU-KA3237FFUD-US User Manual

Condensing Water Heater Service Manual 4 100000354
Specifications
[1] Minimum activation flow is approximately 0.4 gallons/minute (1.5 liters/min); minimum flow is approximately
0.26 gallons/minute (1 liter/min).
[2] Max temperature is 185 ºF (85 ºC) with the MCC-91 controller for commercial and hydronic applications only.
Trade Name Model Max. BTU Min. BTU Max Flow [1]
gal/min (liters/min)
Temperature Range
RC80HPe,
RC80e
REU-KA2530WD-US
157,000
9,500 (NG)
10,300 (LPG)
8.0 (30)
98 - 140 ºF (37-60 ºC) [2]
RC98HPe,
RC98e
REU-KA3237WD-US
199,000
9,500 (NG)
10,300 (LPG)
9.8 (37)
RU80e REU-KB2530WD-US 152,000 15,200 8.0 (30)
RU98e REU-KB3237WD-US 199,000 15,200 9.8 (37)
Condensing Series - Residential or Commercial - Outdoor
Trade Name Model Max. BTU Min. BTU Max Flow [1]
gal/min (liters/min)
Temperature Range
RC80HPi,
RC80i
REU-KA2530FFUD-US
157,000
9,500 (NG)
10,300 (LPG)
8.0 (30)
98 - 140 ºF (37-60 ºC) [2]
RC98HPi,
RC98i
REU-KA3237FFUD-US
199,000
9,500 (NG)
10,300 (LPG)
9.8 (37)
RU80i
REU-KB2530FFUD-US
152,000 15,200 8.0 (30)
RU98i
REU-KA3237FFUD-US
199,000 15,200 9.8 (37)
Condensing Series - Residential or Commercial - Indoor
Diagnostic Codes
The Rinnai water heater has the ability to check its own operation continuously. If a fault occurs, an error code
will flash on the display of the temperature controller. This assists with diagnosing the fault and may enable you
to overcome a problem without a service call.
Important Safety Notes
There are a number of (live) tests that are required when fault finding this product.
Extreme care should be used at all times to avoid contact with energized components
inside the water heater. Only trained and qualified service technicians should attempt to
repair this product. Before checking for resistance readings, disconnect the power
source to the unit and isolate the item from the circuit (unplug it).
WARNING
Accessing Operating Information
To display the most recent error codes press and hold the “On/Off” button for 2 seconds. While holding the “On/
Off” button press the ▲ button. The last 9 error codes will flash one after the other. To exit this mode press the
“On/Off” and ▲ button as before.
To display the water flow through the water heater press and hold the ▲ button for 2 seconds and without
releasing the ▲ button press the “On/Off” button.
To display the outlet water temperature press and hold the ▼ button for 2 seconds and without releasing the ▼
button press the “On/Off” button.
Models MC-91 and MCC-91 (KA Series)

Rinnai REU-KA3237FFUD-US Specifications

General

Brand	Rinnai
Model	REU-KA3237FFUD-US
Category	Water Heater
Language	English