LAARS LT Recirculation Model LT199NRX1/LT199PRX1-Recirc programming functions and defaults.
The LAARS LT199NRX1/LT199PRX1 (recirc models) are program defaulted from the factory for NON recirc.
To activate recirc function the water heater must be programmed to provide recirc function depending on the recirc option selected and piped in that way if chosen .
Pages 54-58 of the I/O manual is step by step instructions for recirc.
Pages 61-66 of the I/O manual goes over actual settings and choices of recirc.
Pages 79 section 5.6 of the I/O manual is the chart of the "INSTALLERS MODE" for programming.
In that chart in column 9:RC are the recirc options including the OFF/deactivation function which IS THE DEFAULT setting from the factory.
LAARS LT199NRX1/LT199PRX1 I/O Manuals:
The LT I/O manuals are also attached here (in attachments)