Tekmar 521 Programmable Thermostat Installation Manual de usuario descargar pdf (Pagina 27)

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A Watts Water Technologies Company

Technical Data

Programmable Thermostat 521 Two Heat or Heat-Cool (Includes Sensor 079)

Literature 521_A, 521_C, 521_D, 521_Q, 521_U

Control Microprocessor control. This is not a safety (limit) control

Packaged weight 0.6 lb. (290 g)

Dimensions 3-11/16” H x 3” W x 15/16” D (94 x 76 x 24 mm)

Enclosure White PVC plastic, NEMA type 1

Approvals Meets Class B: ICES & FCC Part 15, CE

Ambient conditions

Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% non-condensing

Power supply 10 to 30 V (ac/dc), 50/60 Hz, 1.8 VA, Class 2

Relay 30 V (ac/dc) 2 A, Class 2 circuits

Sensor

NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892

– Included Slab Sensor 079

– Optional tekmar type # 070, 072, 073, 076, 077, 079, 084

Frequently Asked Questions

Symptom Look for... Corrective Action

Display powering

on and off.

Measure voltage at

wiring terminals R

and C.

The power supply transformer

may have limited VA capacity. A

transformer with a larger VA rating is

recommended.

Heat not on

Mode Off or Cool

Thermostat must be in Mode Heat in

order to provide heating.

Floor Max

The floor has reached the maximum

operating temperature.

Room is too

hot due to floor

heating being on

Floor Min

Lower the Set Floor temperature

setting.

Cooling not on Mode Off or Heat

Thermostat must be in Mode Cool in

order to provide cooling.

Slab Sensor 079 10’ (3 m) wire

Dimensions

3/16” OD x 1-1/2” (5 mm OD x 38 mm)

Enclosure

316 stainless steel, 10’ (3 m) 24 AWG, 300 volt PVC insulated Zipcord

Approvals CSA C US

Operating range -58 to 221°F (-50 to 105°C)

Sensor

NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892

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