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tekmarNet® 4 Thermostat 542 - One Stage Heat
DISCONTINUED

The tekmarNet^® 4 Thermostat 542 is designed to operate mechanical equipment to deliver heat to a single zone within a hydronic heating system while maintaining a programmable setback schedule. It can be used with any terminal unit type, including radiant floor, baseboard, and fan coils. It is capable of controlling a zone valve or zone pump directly or through a tekmarNet^® 4 Wiring Center or Zone Manager to maintain air temperature and an auxiliary temperature. This temperature is typically floor, but could also be remote air.

The 542 has been replaced by

552 tekmarNet® Thermostat

Features & Specs

Features (definitions)

2 Auxiliary Sensor inputs
Auto Heating Cycle
Backlight
CSA C US approved for use in USA and Canada
Cool Group member
Exercising
Freeze Protection
One touch overrides (with optional User Switch)
Outdoor temperature display
Programmable setback schedule
Pulse Width Modulation
Room Temperature Limiting
Schedule master
Zone Post Purge
Zone Synchronization
tekmarNet^® 4 communication compatible

Specifications

Control	Microprocessor control. This is not a safety (limit) control
Packaged weight	0.5 lb. (230 g)
Dimensions	2-7/8" H x 2-7/8" W x 13/16" D (73 x 73 x 21 mm)
Enclosure	White PVC plastic, NEMA type 2
Approvals	CSA C US, meets Class B: ICES & FCC Part 15
Ambient conditions	Indoor use only, 32 to 122°F (0 to 50°C), RH ≤80% to 88°F (31°C), down to 50% above 104°F (40°C), Altitude <6560 ft. (2000 m), Installation Category II, Pollution Degree
Power supply	24 V (ac) ± 10%, 60 Hz, 1.6 VA
W1 relay	24 V (ac) 2 A max
Sensors	NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
-Included	None
-Optional	tekmar type # 070, 071, 072, 073, 076, 077, 078, 079, 082, 084
Warranty	Limited 3 Year Warranty

Technical