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For Residential and Commercial Applications
ES-ST-Command
Job Name
Job Location
Engineer
Approval
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SunStat® Command
Programmable Touchscreen Thermostat
This all-in-one thermostat includes a built-in relay to control 120 or 240
VAC floor heating systems and a GFCI to improve safety. By default, the
SunStat Command controls the floor temperature. It can optionally limit the
floor temperature to prevent the space from overheating, or be configured
to control the space through air temperature alone.
Specifications
Literature IOM-ST-Command, ES-ST-Command
Operation Voltage 120/240 VAC, 60 Hz, 3 watts
Maximum Load 15 amps resistive
Maximum Power
GFCI Class A (5 milliamp trip)
Dimensions
Enclosure White PVC plastic, NEMA type 1
Ambient conditions 32 to 86°F (0 to 30°C), <90% RH non-condensing
Floor Sensor Thermistor, 10k NTC type, 300 V jacketed cable, 15' long
4-5/8" H x 2-19/20" W x 1-13/20" D (118 x 75 x 42 mm)
Features
• Floor and air sensing control
• Touchscreen display with multiple color themes
• Thin profile with removable, paintable beauty ring
• 7-day programmable schedules
• Energy use monitoring
• Comprehensive help screens
• Home automation system tie-in
• Temporary hold setting
1800 watts at 120 VAC
3600 watts at 240 VAC
Contractor
Approval
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Contractor’s P.O. No.
Representative
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Floor Sensor SunStat Command
Setpoint
°F
74
4-5/8"
Floor
(118 mm)
Smart Start
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0.5"
(12 mm)
AM
6:27Fri, May 01
°F
74
HEATING
TESTRESET
GFCI / TEST MONTHLY
UL Listed under UL 943, UL 873, UL 991
Listing le number E365015.
Product Options
This Engineering Sheet is not intended to provide full installation instructions
and safety information. In order to avoid property damage or injury, please
refer to the complete installation manual and product safety information
Qty Description Model# Order#
SunStat Command Thermostat 500850-SB 81019079
Extra Floor Sensor (optional) 50 0110 81009178
provided with the product.
SunTouch product specications in U.S. customary units and metric are approximate and are provided for reference only. For precise measurements, please contact SunTouch Technical Service. SunTouch reserves the right to
change or modify product design, construction, specications, or materials without prior notice and without incurring
any obligation to make such changes and modications on SunTouch products previously or subsequently sold.
2-19/20"
(75 mm)
1-13/20"
(42 mm)
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L1 (240 V)
L2 (240 V)
To additional
SunStat Command Application Examples
Typical Wiring for SunStat Command with one mat or cable
(120/240 VAC).
Dedicated 120 or 240 VAC, 20-amp (maximum) circuit
(maximum 15 amp load through SunStat control)
SunStat Command
LOAD 2
L2 (240 V )
N (120 V)
L1 (240 V)
L (120 V)
120 VAC
or 240 VAC
Power
G
Floor Heating
(240 V)
L2
(120 V)
N
(240 V)
L1
(120 V)
L
LOAD 1
Floor Heating
AWAY
COM (A)
RELAY(B)
SENSOR
SENSOR
6
5
4
3
2
1
120 VAC or 240 VAC mat or cable
(maximum 15 amps)
Typical Wiring for SunStat Command with multiple mats
or cables (120/240 VAC).
Dedicated 120 or 240 VAC, 20-amp (maximum) circuit
(maximum 15 amp load through SunStat control)
SunStat Command
LOAD 2
Floor Heating
L2 (240 V )
N (120 V)
L1 (240 V)
L (120 V)
120 VAC
or 240 VAC
Power
G
(240 V)
L2
(120 V)
N
(240 V)
L1
(120 V)
L
LOAD 1
Floor Heating
AWAY
COM (A)
RELAY(B)
SENSOR
SENSOR
6
5
4
3
2
1
Two or more 120 VAC or 240 VAC mats
or cables (maximum 15 amps)
Electrical Wiring Diagram for SunStat Command with SunStat Relay C3 (120/240 VAC). Up to 10 SunStat Relay C3's can be connected
to expand the area controlled by a single SunStat Command.
Dedicated 120 or 240 VAC, 20-amp (maximum) circuit (maximum 15 amp load through SunStat control)
N (120 V)
L (120 V)
120 VAC
or
240 VAC
Power
SunStat Command
LOAD 2
Floor Heating
(240 V)
L2
(120 V)
N
(240 V)
L1
(120 V)
L
LOAD 1
Floor Heating
G
120 VAC or 240 VAC Heating
Mats or Cables (maximum 15 amps)
AWAY
COM (A)
RELAY(B)
SENSOR
SENSOR
6
5
4
3
2
1
Use size 18- to 24-gauge 2-conductor
wire up to 100 feet (30 m) in length to
connect Control to Relay C3.
L2 (240 V)
N (120 V)
L1 (240 V)
L (120 V)
120 VAC
or
240 VAC
Power
G
SunStat Relay C3
LOAD 2
Floor Heating
(240 V)
L2
(120 V)
N
(240 V)
L1
(120 V)
L
LOAD 1
Floor Heating
Mats or Cables (maximum 15 amps)
RELAY(B)
6
5
COM (A)
4
RELAY(B)
COM (A)
Relay C3
3
(if required)
2
1
120 VAC or 240 VAC Heating
A Watts Water Technologies Company
USA: Tel: (888) 432-8932 • Fax: (417) 831-4067
Canada: Tel: (888) 208-8927 • Fax: (905) 332-7068
Latin America: Tel: (52) 81-1001-8600 • Fax: (52) 81-8000-7091
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