Submittal Sheet

Job __________________________
Designer ______________________
Contact _______________________
tekmarNet
®
Thermostat 557
557
_
C
08/12
Zoning Replaces: New
Submittal
© 2012 557_C - 08/12
1 of 2
A Watts Water Technologies Company
Energy Saving Features
------------
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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
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Specifications
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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.
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.
tekmarNet
®
Thermostat 557 Radiant Floor, 2 Heat Pump/Cool, Backup, Humidity
Literature 557_A, 557_C, 557_D, 557_Q, 557_U
Control Microprocessor control. This is not a safety (limit) control
Packaged weight 0.9 lb. (400 g)
Dimensions 4-1/2” H x 4-3/4” W x 7/8” D (114 x 120 x 22 mm)
Enclosure White PVC plastic, NEMA type 1
Approvals
Meets Class B: ICES & FCC Part 15
Ambient conditions
Indoor use only, 32 to 122°F (0 to 50°C),
RH ≤90% non-condensing
Environmental
Compatible with chlorinated swimming pool environments. Not
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
–Optional
tekmar type # 070, 072, 073, 076, 077, 079, 083, 084, 086
Warranty Limited 3 Year (See 557_D for full warranty)
Side View
Front View Cover Off
7/8”
(22 mm)
Back Cover
tekmarNet
Thermostat 557
Radiant Floor, 2 Heat Pump/Cool,
Backup, Humidity
Power: tN2 or 24 V (ac) ±10% 2 VA
Relays: 24 V (ac) 2 A, Class 2 circuits
1044-01
Meets Class B: ICES and FCC Part 15
Accessory Relay
Accessory Relay
Backup Heat 2 Relay
Backup Heat 2 Power
Heat 1 Relay
Heat 1 Power
Power 24 V (ac)
Power Neutral / tN2
tN4 / tN2
Sensor 1
Sensor 2
Sensor Common
Sensor 3
Humidity Sensor Power +V
Compressor 2 Relay
Compressor 1 Relay
Heat Pump / AC & Fan Power
Fan Relay
Reversing Valve
UnusedUnlock
Lock
ACC
ACC
W2
Rh2
W1
Rh1
R
C/tN2
tN4/2
S1
S2
Com
S3
0-10
Y2
Y1
Rc
G1
O/B
Terminal Functions
DIP Switch Setings
No Power
/
www.tekmarControls.com
ON
Designed and assembled in Canada
W1Rh1 Rh2 W2 ACC
Y2 Y1 Rc G1 O/B
S3
0-10
Vdc
Com
S2 S1
tN4 C
R
4–1/2”
(114 mm)
4–3/4” (120 mm)
CL
5/8”
(16 mm)
1–1/2” (38 mm)
2–3/4”
(71 mm)
2–1/8”
(54 mm)