Installation Manual

Rinnai Tankless Rack System (TRS) Installation Manual 49

ThermaCirc360 water heaters are factory set

for dedicated recirculaon.

A threaded cap and bypass plug assembly

are installed in the hot water outlet at the

base of the water heater.

For dedicated recirculaon, it is NOT

necessary to remove this plug.

04 Recirculaon Sengs

Dedicated Mode: Adjust parameter seng to 04 for dedicated recirculaon applicaons. Maximum

recirculaon loop length of 400  (122 m) with 3/4 in. pipe or 100  (30 m) with 1/2 in. pipe.

SETTING

DESCRIPTION

SELECTION

A c

Recirculaon

Sengs

Recirculaon

Dedicated Mode

Crossover Mode

Long Loop Short Loop

Recirculaon

Modes

Economy

Comfort

*Take equivalent elbow lengths into consideraon

when calculang pipe length.

Maximum Pipe Length*

Maximum pipe length includes the hot water supply line

and dedicated return line.

Pipe Diameter 3/4 in. 1/2 in.

Total 400  (122 m) 100  (30 m)

Refer to the Parameter Seng secon of the “Rinnai Tankless Water Heater Installaon and Operaon Manual” for

instrucons on accessing and changing parameter sengs.

05 Recirculaon Modes

• Economy (Factory Default): Adjust parameter seng to 05A for Economy mode. This mode cycles the pump

less oen, using less energy to maintain the circulaon loop temperature.

• Comfort: Adjust parameter seng to 05 for Comfort mode. This mode cycles the pump more frequently,

ensuring the loop temperature remains higher (but also uses more energy).

Configure TRW02ST and TRW03ST Racks for Dedicated Mode (Dedicated Recirculation Return Line) (Continued)

Plug/Filter Assembly (Dedicated Mode)

Parameter Sengs (Dedicated Mode)