tekmar 538 Thermostat Installation - Manual (Page 23)

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Technical Data
tekmarNet ® 4 Thermostat 538; One Stage Heat
Packaged weight 0.8 lb. (380 g)
Enclosure White PVC plastic, NEMA Type 1
Dimensions 2-7/8” H x 2-7/8” W x 13/16” D (73 x 73 x 21 mm)
Approvals CSA C US, meets Class B: ICES and FCC Part 15
Ambient conditions Indoor use only, 32 to 122°F (0 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 Degree 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
– Optional tekmar type # 070, 072, 073, 076, 077, 079, 084
Job Record
Jobsite Location ________________________________________________
Thermostat Location _____________________________________________
Item Setting Item Setting
Set Room Heat Set Floor Min
Set Room Heat Set Floor Max
Set Room Heat Away Schedule Member
Set Floor Heat Heat Supply Pump
Set Floor Heat Heat Supply Pump Delay
Backlight Heat Cycles Per Hour
Units Air Group
Max Set Room Heat Room Sensor
Max Set Room Heat Sensor
Min Set Room Heat tekmarNet ® Address
Set Floor Min Floor Cooling