• © 2009 Rinnai America Corporation
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• Some DHW parameters are accessible but should never be adjusted. This is indicated with N/A at the
description. Ensure factory settings are always maintained at these parameters
• DHW parameters that are available at the user level are indicated below
• This chapter is not available on combi boilers or if there is no sensor at terminals 16 and 17 (DHW priority)
PARA
Description
Range / Explanation
Factory
Setting
User
Access
1
DHW economy
(nighttime
setback) temp
50
°F to DHW
max temp
(PARA 6)
Temp for DHW during night time
setback.
100
°F
Yes
NOTE: 100
°F=Default at shipment, 68°F=Default at System Reset
2
DHW Legionella
Protection
OFF
No Legionella protection
Monday
Yes
Mo-Su, ALL
One day only or every day (ALL)
3
DHW Legionella
time of operation
0:00 to 23:00
This is not available if PARA 2 is
OFF
2:00
(am)
No
4
DHW Legionella
operation temp
50
°F to DHW
max temp
(PARA 6)
This is not available if PARA 2 is
OFF. Do not adjust lower than
140
°F
149
°F
No
16
N/A
N/A
This should not be altered
131
°F
Yes
DHW Parameters
6
DHW max temp
68
°F to 176°F
This overrides boiler PARA 31.
149
°F
No
NOTE: This value will go to 203
°F but the boiler will never eclipse 176°F; NOTE: During a split load between
heat and DHW, the supply temp is based on DHW needs
—do not use on direct-coupled in-floor radiant systems