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Setup
Setting
number
0348
Fan speed selection
0349
Auto fan speed selection reset
0535
Temporary occupied duration
limit
0540
Number of programmable
periods
0600
Maximum temperature
0640
Clock format
0650
Extended fan-on time heat
0670
Keypad lockout
0680
Temperature control heat
0685
Recovery heat temp. rate
0700
Temp. display offset (refer p. 8
for further information)
0710
Restore factory defaults
0720
Screen display
Default
Settings available
setting
0
0 = user can choose
1 = cycle to auto only
0
0 = doesn't switch back to auto
fan speed
1 = reset to auto after 2 hrs
2= reset to auto after 4 hrs
3
0-12 hours
4
2 = two periods
4 = four periods
90
40 to 90 °F (4-32 °C)
12
12 = 12 hour
24 = 24 hour
0
0 = off
0
0 = unlocked
1 = partial lockout 1
2 = partial lockout 2
3 = partial lockout 3
4 = fully locked
2
1 = less aggressive
2 = standard
3 = more aggressive
5
0-20 °F/hour
0
-1.5 °C to 1.5 °C
-3.0 °F to 3.0 °F
0
0 = no
1 = yes
2
0 = display room temp.
1 = display setpoint
2 = display both
Notes
Fan runs at the speed selected automatically by the
thermostat
If 0 is selected in 0348 then the thermostat will revert
back to auto fan speed after this time
0 = no limit (refer p. 8 for further information)
DO NOT ALTER—iHeat control board has built-in fan
delays
All functions accessible
Locks out system and schedule changes
Locks out system, schedule, and fan changes
Locks out schedule, system, fan, and up/down arrow
changes
Entire interface locked/non-functional
Set to 1 to reduce Infinity starts and allow room
temperature to vary slightly
Set to 3 to control room temperature more, but Infinity
will start more often
This parameter determines how quickly the room
temp. is changed ahead of the programmed time so
the room will be at the desired temperature. High
values will likely cause the fan to run at high speeds,
which could increase air movement noise. For
example, if the programmed temp. is set to 22 °C at
6am and 0685 is set at 15, the iHeat system could run
at maximum at 5:30am to heat the house—this could
potentially be disruptive. Rinnai recommends leaving
the setting at 5.
This is a calibration adjustment. This can be changed
so the temperature displayed matches an existing
reference thermometer that a customer may have.
Resets all ISU/schedule parameters to default
values. Retains only calendar settings and time.
iHeat thermostat installation guide: 12064-A 01-13 | 7
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