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Temperature Controller Settings
This water heater will attempt to provide hot water at the temperature setting even when the water flow is varied
or when more than 1 tap is in use. The water heater can deliver water at only one temperature setting at a time.
The available temperatures for a given model are provided below.
Model
V53i
V53e
Temp in Celsius ºC
* MCC-91 Temperature Controller
These settings require the MCC-91 controller. When the MCC-91 controller is connected, these higher
temperatures are available on all controller models in the system.
Use of an MCC-91 controller in a residential dwelling will reduce the warranty coverage to that of a commercial
warranty application which is no coverage for these models (except when an MCC-91 is used with a Rinnai
Hydronic Air Handler). See the Warranty Information for more information on the warranty.
The MCC-91 controller is intended for commercial and hydronic applications only. If an MCC-91 controller is
used in a residential dwelling for a hydronics application, a mixing valve must also be installed to limit the
potable hot water temperature to a safe temperature. Water temperatures over 125º F (52º C) can cause
severe burns or scalding. Refer to the Danger Alert on water temperatures. Rinnai shall not, in any event, be
liable for damages resulting from such misuse or misapplication.
Suggested temperatures are
•
Kitchen
120 ºF (49º C)
•
Shower
98 - 110 ºF (37 - 43 ºC)
•
Bath Fill
102 - 110 ºF (39 - 43 ºC)
These temperatures are suggestions only.
Temperature Options Without a Temperature Controller
The default temperature setting for this appliance
installed without a temperature controller is 120º F
(49º C). If desired the temperature setting can be
changed to 140º F (60º C) by adjustment of a switch.
Set switch 5 to ON to obtain 140º F water temperature
setting.
Set switch 5 to OFF (default) to obtain 120º F water
temperature setting.
If a temperature controller is installed then switch 5
has no effect on temperature settings.
WARNING
98
100 102 104 106 108 110 115 120 125 130 135 140
37
38
39
40
DO NOT adjust the other
switches unless specifically
instructed to do so.
V53i & V53e Operation and Installation Manual
Temperature Settings Available (ºF)
41
42
43
46
A temperature lower than 98 ºF (37 ºC) can be
obtained at the tap by mixing with cold water.
To change the temperature scale from Celsius to
Fahrenheit or vice versa, press and hold the "On/Off"
button for 5 seconds while the water heater is OFF.
120º F (49º C)
Switch No.
O
F
F
49
52
54
57
140º F (60º C)
Switch No.
ON
O
1
F
2
F
3
4
5
6
7
8
150
160
*
*
60
66
71
ON
1
2
3
4
5
6
7
8
9
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