tekmarNet® 4 One Stage Heat Thermostat
Control Description The tekmarNet®4 thermostat 538 is a basic one stage heating thermostat that includes the functionality of a Floor or Outdoor Sensor. The 538 can operate as a stand alone device, or communicate with a group of tekmarNet®4 thermostats.
Literature —
D 538 , J 538 , U 538
Control —
Microprocessor PID control; This is not a safety (limit) control
Packaged weight —
0.8 lb. (380 g), Enclosure J, white PVC plastic
Dimensions —
2-7/8" H x 2-7/8" W x 13/16" D (73 x 73 x 21 mm)
Approvals —
CSA C US, CSA/UL 61010-1, meets Class B: ICES and FCC Part 15
Ambient Conditions —
Indoor use only, 36 to 122°F (2 to 50°C).
—
RH max 92% to 104°F (40°C), and 50% above 104°F (40°C)
—
Altitude < 9840 feet (3000 m), Installation Category II, Pollution Category 2
Power Supply —
24 V (ac) ± 10% 50/60 Hz, 1.8 VA Standby, 56 VA fully loaded, NEC / CEC Class 2
W Relay —
24 V (ac) 2 A
Sensors —
NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
Included —
None
Optional —
tekmar type # 071, 070, 072, 073, 076, 077, 078, 079, 083, 084
