Rinnai RHFE-308FTR How To Use Manual page 17

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This

function operates automatically in conjunction with either of the Timers.

When a Timer

selected, the heater may operate anywhere within an hour prior to the programmed starting time of

the Timer.

The

Pre-heat function will

heat a room to the preset

temperature by the programmed On

Time.

This

function is called Pm-heat due to the way it operates. The room temperature is sensed one

hour before reaching the programmed time of either Timer.

The temperature differential at the time of sensing the room temperature, combined with the data

from the previous operation governs exactly how long' before

the programmed

On time

the

microcomputer

will operate the heater and ignite the burner.

The following chart may help to improve understanding of the Pre-heat function.

TIME ELAPSED FROM IGNITION TO PRESET TEMPERATURE

I Programmed time

I Later than avaraga i~nitkm

I Avaraga rtariillg tima

: Eatiier than usual ignilion

3oom

tamparatio

sonsad

-16-

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