Rinnai RUR98e (REU-KBP3237WD-US) Installation Manual download pdf (Page 41)

KBP Series Manual 41

Recirculaon Modes

Sequence of Operaon

DIP switches (SW #4, #7, & #8 in DIPSW 2) should be

set correctly for recirculaon mode. The Rinnai water

heater should be turned on.

Pump recirculaon begins when the water heater is

turned on. The Rinnai inlet and/or outlet thermistors

measure the water temperature.

The cycle will restart at the approximate me

intervals based on the applicaon (Cross over or

Dedicated mode, set temperature, and preset mode

ie. Comfort or Economy)

Rinnai Circ-Logic™ oers homeowners enhanced

convenience and energy eciency in home hot water

recirculaon systems with a dedicated return line or

cross over return using the included thermal by-pass

valve.

Circ-Logic™ has been designed to provide

homeowners with the ability to customize their

recirculaon systems based on such key variables as

length of recirculaon loop, piping insulaon, and the

homeowner's comfort and eciency preferences.

NOTE

Rinnai strongly recommends installing insulaon to

the hot water and dedicated return lines to decrease

the amount of heat loss .

Dedicated Mode

Maximum Pipe Length

(Hot Water Supply Line and Dedicated Return Line)

Pipe Diameter 3/4" 1/2"

Total 400 100

 Dedicated return line will run from point of use

located farthest away from tankless water heater.

 Less energy is consumed due to fewer pump

cycles

 When the return water temperature reaches

approximately 12.6°F (7°C) below the selected

temperature seng, the water heater and pump

will turn o.

Dedicated mode requires that a dedicated line be

installed in the applicaon; Refer to Installaon of

Plumbing secon (Dedicated Mode Plumbing Diagram)

Dedicated Return Line:

Dip Switch sengs for Dedicated Mode (DIPSW 2)

Operaon SW 4 in SW 7 in SW 8 in

Pump o OFF OFF N/A

Dedicated Pipe OFF ON N/A

Economy N/A N/A OFF

Comfort N/A N/A ON

Rinnai

Temperature Seng

°F

Typical Pump ON

Intervals* (minutes)

Economy Comfort

140 18 9

135 20 10

130 22 11

125 24 12

120 28 14

115 32 16

110 38 19

108 40 20

106 44 22

104 48 24

102 52 26

100 56 28

98 62 31

Dedicated Mode Pump Intervals

* The pump will cycle on at these calculated

intervals which are based on the temperature

seng, insulaon, and esmated heat loss in the

system. The values for your installaon may vary.

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Rinnai RUR98e (REU-KBP3237WD-US) Installation Manual Page 41

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