heat-timer RSM Installation & Operating Instructions Manual page 5

DISPLAY SETTINGS and ADJUSTMENTS
PRESS
LEFT
DISPLAY
BUTTON
Once
Supply Temp
Twice
Return Temp
3 times
Target
4 times
Slab ∆T
5 times
Supply Limit
6 times
Outdoor Cutoff
7 times
8 times
Outdoor Temp
Default
IMPORTANT: The values for Slab ∆( delta) T, Supply Limit, Outdoor Cutoff, and Tune, can only be changed when they
are being displayed. Once the values have been set, they will remain in the RSM memory even if power to the unit is
interrupted or lost.
WARNING: The Slab ∆ ∆ ∆ ∆ ∆ (delta) T and the Supply Limit must be set to the specification of the
slab installer or component manufacturer. If these values are not set correctly, the slab may
be permanently damaged. If high temperatures will damage the slab or the slab compo-
nents, a separate high limit controller must be installed to shut down the heating system if
excessively high temperatures are being supplied to the slab.
R S M
If value needs adjustment, press the UP or DOWN buttons
To make large changes, keep the UP or DOWN button pressed
This is the temperature of the fluid being supplied to the slab. If it does
not read correctly, check the Troubleshooting guide.
This is the temperature of the fluid returning from the slab. If it does not
read correctly, check the Troubleshooting guide.
This is the target supply fluid temperature. The RSM controls the
motorized valve to hold this target temperature. The target will change
based on the sensor readings and the parameters set below.
The Slab ∆(Delta) T is determined by the design specifications for the
particular slab. The Slab ∆T is the maximum difference between the
Slab Supply and Slab Return temperature. The Slab ∆T can be adjusted
from 5 to 50°F.
The Supply Limit is the highest temperature for which the slab heating
system is rated. The manufacturer will specify the maximum temp-
erature for their components. The Supply Limit can be adjusted from 70
to 180°F.
The heating system will be activated when the outdoor temperature is
below the Outdoor Cutoff. The Outdoor Cutoff temperature can be set
to OFF, adjusted from 20°F to 50°F, or set to ON. In the OFF mode, the
heating system can only be activated by the External Starter.
The Tune controls the temperature of the slab. The Tune should be set
to the lowest value which still melts frozen precipitation. Do not adjust
Tune
the Tune before the slab has had sufficient time to warm up.
This is the temperature reading of the outdoor sensor. If it does not
read correctly, check the Troubleshooting guide.
Release center button to read value
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