557_C
Submittal
08/12
tekmarNet® Thermostat 557
Zoning
Job __________________________
Replaces: New
Contact _______________________
Designer ______________________
®
The tekmarNet Thermostat 557 is a communicating touchscreen thermostat designed to operate either a) a hydronic radiant floor with
a two stage heat pump (water-to-air or air-to-air) for heating and cooling and an emergency backup heating system; or b) two stages
of heating and two stages of cooling. There are three auxiliary sensor inputs that can be used to measure room, floor, outdoor, or duct
temperature. The optional floor sensor allows precise heating of radiant floors. Relative humidity level can be measured and controlled
using either the built-in or external humidity sensor. The large touchscreen display allows you to easily adjust 7-day programmable
schedules and room temperatures to optimize comfort and energy savings. The 557 can connect to tekmarNet ® controls using two or
four wires or it can be installed as a stand-alone device.
Front View Cover Off
Back Cover
2–1/8”
(54 mm)
Side View
/
tekmarNet
Thermostat 557
Radiant Floor, 2 Heat Pump/Cool,
Backup, Humidity
www.tekmarControls.com
Power: tN2 or 24 V (ac) ±10% 2 VA
Relays: 24 V (ac) 2 A, Class 2 circuits
2–3/4”
(71 mm)
Rh1 W1 Rh2 W2
Designed and assembled in Canada
Meets Class B: ICES and FCC Part 15
ACC
tN4 C
R
Terminal Functions
No Power
0-10
Vdc S3 Com S2
S1
4–1/2”
(114 mm)
Y2 Y1 Rc G1 O/B
ACC Accessory Relay
ACC Accessory Relay
W2 Backup Heat 2 Relay
Rh2 Backup Heat 2 Power
W1 Heat 1 Relay
Rh1 Heat 1 Power
R
Power 24 V (ac)
C/tN2 Power Neutral / tN2
tN4/2 tN4 / tN2
S1 Sensor 1
S2 Sensor 2
Com Sensor Common
S3 Sensor 3
0-10 Humidity Sensor Power +V
Y2 Compressor 2 Relay
Y1 Compressor 1 Relay
Rc Heat Pump / AC & Fan Power
G1 Fan Relay
O/B Reversing Valve
DIP Switch Setings
CL
5/8”
(16 mm)
Lock
Unlock
ON
Unused 1044-01
1–1/2” (38 mm)
7/8”
(22 mm)
4–3/4” (120 mm)
--------Specifications --------------------------------------------------------------------------------------- Energy Saving Features ---tekmarNet® Thermostat 557 Radiant Floor, 2 Heat Pump/Cool, Backup, Humidity
Literature
Control
Packaged weight
Dimensions
Enclosure
Approvals
557_A, 557_C, 557_D, 557_Q, 557_U
Microprocessor control. This is not a safety (limit) control
0.9 lb. (400 g)
4-1/2” H x 4-3/4” W x 7/8” D (114 x 120 x 22 mm)
White PVC plastic, NEMA type 1
Meets Class B: ICES & FCC Part 15
Indoor use only, 32 to 122°F (0 to 50°C),
Ambient conditions
RH ≤90% non-condensing
Compatible with chlorinated swimming pool environments. Not
Environmental
compatible with ammonia (animal barns), methanol, ethanol,
acetone.
Power supply
24 V ±10%, 60 Hz, 2.0 VA standby, NEC / CEC Class 2
Relays
24 V (ac) 2 A
0-10 Vdc terminal
3.3 V (dc) for humidity sensor power, 3.0 mA max
Humidity sensor
0 to 90% ± 3% RH
Temperature sensor NTC thermistor, 10 kΩ @ 77°F (25°C ±0.2°C) ß=3892
–Included
None
tekmar type # 070, 072, 073, 076, 077, 079, 083, 084, 086
–Optional
Warranty
Limited 3 Year (See 557_D for full warranty)
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Programmable Schedule
Zone Synchronization
Zone Post Purge
Warm Weather Shut Down
Cooling Interlock
Auto Heating Cycle
Temporary Hold
Away Scene Key
Additional Features -----------------•
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3 Auxiliary Sensor Inputs
tekmarNet ® Communication Compatible
Touchscreen Technology
Outdoor & Floor Temperature Display
Backlight
Radiant Floor Heating & Cooling
Freeze Protection
Exercising
Heat / Cool Priority
Air Group Master
Network Schedule Master or Member
Optimum Start
Scenes
Daylight Savings Time
Room Temperature Limiting
Relative Humidity Control
SPECIAL REQUIREMENTS
This thermostat is designed to be used with a tekmarNet ® House Control, Wiring Center or Zone Manager for power and communication.
It can also be used in stand alone applications.
A Watts Water Technologies Company
1 of 2
© 2012
557_C - 08/12
Sample Application Drawing
Below is a sample application drawing for this product. This application may include other tekmar products that are required
for installation. More sample applications can be found at www.tekmarControls.com.
Sample Mechanical diagram
Legend
ACC = Humidifier
HP1 = Air to Air Heat Pump
S2 = Outdoor Sensor 070
W2
S2
557
ACC
Hum
HP1
Sample Electrical diagram
ACC (humidifier)
ACC
S1 tN4 C
R
Rh1 W1 Rh2 W2
0-10 S3 Com S2
Vdc
W2 (backup heat)
Y2 (2nd stage compressor)
Y1 (1st stage compressor)
R (24 V (ac) power)
C (24 V (ac) common)
G (fan)
O/B (reversing valve)
Heat
Pump
Y2 Y1 Rc G1 O/B
S2 (Outdoor Sensor 070)
tekmar Control Systems Ltd., A Watts Water Technologies Company. Head Office: 5100 Silver Star Road,
Vernon, B.C. Canada V1B 3K4, 250-545-7749, Fax. 250-545-0650 Web Site: www.tekmarControls.com
Product design, software and literature are Copyright ©2012 by
tekmar Control Systems Ltd., A Watts Water Technologies Company
2 of 2
All specifications are subject to change without notice.
Printed in Canada. 557_C - 08/12.