heat-timer RSM Installation & Operating Instructions Manual page 4

Wiring the Output - Valve Motor
• The valve outputs are dry contact only. They do not
source any power to the valve motor.
• The RED wire is COMMON.
• The WHITE wire connects to OPEN (for more heat).
• The BLACK wire connects to CLOSE (for less heat).
• The wiring to Heat-Timer Radiant Valves (3-way
HT#9285xx or 4-way HT#9284xx) is shown left. If using
other valves, check the appropriate wiring with the valve
manufacturer.
Wiring the Optional External System Starter
• The EXT and COM terminals may be used as an optional external system starter. The external starter signal must be a
dry contact only. If power is applied across the EXT and COM terminals, the RSM may be damaged.
• A closure (short) across the terminals marked EXT and COM will cause the RSM to activate the slab heating system.
The RSM will keep the system activated until the external starter signal is removed.
• To activate the slab heating system exclusively with the external starter, set the Outdoor Cutoff Temperature to OFF
(see pg. 5).
Setting the Operating Mode
• The RSM can be field adjusted to display values either in °F or °C.
• The sensors input range is from -35 to 250°F or from -30 to 120°C.
• Do the following to set the desired range:
1. Remove power to the RSM (if it was powered) and reapply power.
2. The display will show the version number of the RSM software.
3. Wait approximately 5 seconds and the display will change to read either °F or °C. If the display shows °F the RSM
will operate in Fahrenheit degrees. If the display shows °C then the RSM will operate in Celsius degrees.
4. If the desired range is shown, there is no need to proceed with the following steps.
5. Hold down the PRESS TO READ button while pushing the UP or DOWN button to toggle between displays of °F
or °C.
6. When the correct range is shown, release the button and wait approximately 5 seconds. If any changes were made
the display will flash. Then the RSM will display the outdoor air temperature.
Initial Settings
• After setting the operating mode, the RSM will display the outdoor air temperature. This is the default value for the
RSM display.
• To see and/or adjust the other parameters, press then release the left button marked PRESS TO READ. The RSM will
display a code to indicate which parameter will be displayed next. After two seconds, the value of the parameter will
be shown.
• For those parameters where the values can be set (described pg. 5), press the UP or DOWN button to change the value
while it is being displayed. Holding down the UP or DOWN button will cause the value to change more quickly.
• The Slab ∆( delta) T must be set to the slab design parameter for the maximum temperature differential between the
slab supply and slab return temperatures (see pg. 6 for details).
• The Supply Limit must be set to the manufacturer's specification for the slab or the slab components. If high tempera-
tures will damage the slab or the slab components, a separate limit controller should be installed (see pg. 6 for details).
• The Outdoor Cutoff comes factory set at 38°F. Therefore, the outdoor air temperature will need to fall below 38°F
before the heating system will be activated (see pg. 6 for details).
• The Tune comes factory set at 0. This value will need to be adjusted when the heating system is running and there is
precipitation (see pg. 6 for details).
Blue
O U T P U T
= S u p p l y T e m p
= R e t u r n T e m p
= T a r g e t U P
= S la b ∆T
PRESS TO READ
= S u p p l y L i m i t
D O W N
= C u t - O f f T e m p
= T u n e
= S l a b A d j u s t
OUT SUP RTN COM EXT COM
4
Blue
WHITE
3
BLACK
M
Heat-Timer
1
BLUE
24VAC
2
BROWN
Radiant
Valve