Rinnai SENSEI RSC160i Installation And Operation Manual page 78

Parameter Settings
Refer to the parameter setting section of this manual for instructions on how to access and change
parameter settings.
Table 34
SETTING
SETTING DESCRIPTION
#
Recirculation Settings
04
Recirculation Mode
05
Recirculation Settings
04
Crossover Mode: Adjust parameter setting to 04c for crossover recirculation applications. Maximum
recirculation loop length of 400 ft (122m) with 3/4 in. pipe or 100 ft (30m) with 1/2 in. pipe
Table 35
(Maximum pipe length includes the hot water supply line and dedicated return line.)
Pipe Diameter
Total
Recirculation Modes
05
Economy (Factory Default): Adjust parameter setting to 05A for Economy mode. This mode cycles
the pump less often, using less energy to maintain the circulation loop temperature.
Comfort: Adjust parameter setting to 05b for Comfort mode. This mode cycles the pump more
frequently, ensuring the loop temperature remains higher (but also uses more energy).
Commercial: Adjust parameter setting to 05C for Commercial mode. This mode cycles the pump on
and off continuously, which may result in excessive machine wear and energy consumption.
Table 36
Pump Status
Economy
Comfort
Commercial
78
No Recirculation
Economy
Table 38: Maximum Pipe Length*
3/4 in.
400 ft. (122 m)
Typical Intervals
Rinnai Tankless Water Heater Installation and Operation Manual
A
Recirculation
(Dedicated)
Comfort
1/2 in.
100 ft. (30 m)
10
4
4
SELECTION
C
Recirculation
(Crossover)
(*Take equivalent elbow
lengths and all fittings
into consideration when
calculating pipe length.)
Important: The internal pump
in an RSC model runs based on
time intervals only and not water
temperature (like dedicated return
line recirculation systems)