The tekmarNet® Thermostat 532 is a communicating thermostat designed for one stage hydronic heating systems. The 532 accurately controls the room and/or floor temperature for a hydronic heating system using Pulse Width Modulation (PWM) technology. Simple up and down buttons and a display with large type make this thermostat easy to read and use. It has two auxiliary sensor inputs that can be assigned to measure room, floor, or outdoor temperature. An optional floor sensor protects the floor from overheating and enhances comfort. The 532 can be wired using 2 or 4 wires to connect to tekmarNet zoning controls, or can be installed as a stand-alone thermostat using 3 wires.
Getting Started
Congratulations on the purchase of your new tekmar® thermostat. This manual will step through the complete installation, programming and sequence of operation for this control. At the back, there are tips for control and system troubleshooting.
Important Safety Information
Tools Required
Materials Required
Choose the placement of the thermostats early in the construction process to enable proper wiring during rough-in.
Removing the Thermostat Base
To remove the thermostat base:
If a single gang box is used
If mounting directly to the wall:
Available auxiliary sensors
Testing tN2 Wiring
It is normal for the thermostat to take up to 20 seconds to power on once connected to a tN2 system. If the thermostat display does not turn on after 20 seconds, try moving the thermostat tN2 wire connections to another zone on the tN2 Wiring Center or tN2 Zone Manager. If the thermostat display does not power on, contact your tekmar sales representative for assistance. Testing tN4 and Stand Alone Wiring
Power
If the thermostat display does not power on, remove the thermostat front and test for 24 V(ac) ±10% between the R and C wiring terminals. If the voltage is incorrect, check the voltage at the transformer. If the transformer measures 24 V(ac) ±10% between the R and C, then there may be an open circuit along the wires. If the thermostat display turns off when powering the heat relay and the load, then the transformer VA capacity is too small and a larger transformer is required.
Heat Relay
Push the
tN4 Communication
The
| Switch | Position | Action |
|
1 | ON | SETBACK The thermostat follows a programmable setback schedule as a sched- ule member if available. Requires the installation of a Thermostat 552, 553, 554, 557 or a Timer 033 to use this feature. |
| OFF | OFF The thermostat does not follow a programmable setback schedule. | |
|
2 | ON | SCENE The thermostat responds to changes in the scene (systemwide manual overrides). Requires the installation of a Gateway or User Switch to use this feature. |
| OFF | OFF The thermostat does not respond to scenes. | |
|
3 |
ON | LOCK ACCESS LEVEL Some Setup menu settings are not visible. Set to Unlock during installation process. tekmarNet® reset control must also be set to Unlocked and Installer access level. |
| OFF | UNLOCK ACCESS LEVEL All Setup menu settings are available. Set to Lock when installation completed. |
Home Screen
Symbols Description
Heating Operation
To change the heat temperature setting, push the
Air Temperature Only
If there is only an air temperature sensor (no floor sensor), the thermostat operates to control your desired air temperature.
Floor Temperature Only
If the air sensor has been disabled, the thermostat will only maintain floor temperature and ignore air temperature. This operation is recommended for areas such as bathrooms to ensure that tile floors are warm to the touch.
Floor and Air Temperature
If the air sensor is turned on and a floor sensor is connected, the thermostat will maintain the desired air temperature as well as a minimum floor temperature. This operation is recommended for areas with large windows that allow the sun to shine into a room and keep it warm without the need for heating. This can allow the floors to cool off during the afternoon. When the sun goes down, it can take a long time for the floors to get warm again. This may cause the room to cool off too much in the early evening. A floor minimum setting can help with this condition by maintaining a floor minimum temperature. Keep in mind the floor minimum temperature will override the air temperature, and if set too high, may overheat the room. This operation is also recommended for rooms with hardwood floors. Setting floor minimum and maximum temperatures is a way of enhancing the comfort of the living space while protecting floor coverings.
Room Minimum and Maximum
Room Minimum and Maximum temperature settings are available in the Setup menu. These allow the installer to select start and stop limits for the temperature setting. This is useful in commercial installations and child or guest bedrooms where availability of the full temperature setting range may not be desirable.
Warm Weather Shut Down
When the outdoor air temperature exceeds the Warm Weather Shut Down (WWSD) setting on the tekmarNet main control, the heating system is shut off.
Freeze Protection
The thermostat operates the heat whenever the room or floor temperature falls below 40°F (4.5°C) even when the mode is set to off.
Exercising
When connected to a tekmarNet system control, the thermostat exercises the heat relay for 10 seconds every 3 days. Exercising helps prevent zone valves or zone pumps from failing due to precipitate buildup. During exercising, the relay turns on but is not shown on the display.
Flushing
The flushing feature is for open-loop systems that use a domestic hot water tank as a heat source. Flushing ensures that fresh potable water is circulated through the system once each day. If the thermostat is connected to a tekmarNet system control with the flushing feature turned on, the relay turns on but is not shown on the display.
Hydronic System Supply Pump
When connected to a tekmarNet system control, the thermostat’s W Pump setting affects how the primary pump or mix pump on the system control operates. When connected to the boiler bus, the boiler system or primary pump is operated when W Pump is set to on. When connected to the mix bus, the mix system pump is operated when W Pump is set to on. If the thermostat operates a thermal motor (wax actuator) zone valve, set the W Delay setting to on. This provides a three-minute delay to allow the zone valve to open before the primary or mix pump is turned on. In special applications with multiple zoning manifolds, the W Pump setting can be set to off. This allows a Zone Group Pump located on the Zone Manager or Wiring Center to operate the pump for the manifold.
DHW Tank Priority
When a tekmarNet® system control is heating an indirect Domestic Hot Water (DHW) tank, the thermostat may shut off the heating zones to allow the DHW tank to recover quickly. This is determined by the DHW priority of the tekmarNet system control.
In order to prevent heating and cooling at the same time, this thermostat can operate together with other thermostats on a tekmarNet system to form an air group. In an air group, a heat-cool thermostat is assigned as the air group master. The air group master operates the cooling and air heating equipment for the group. The 532 can be set to be a member of the air group. When operating as an air group, the air temperature readings of all the air group member thermostats are communicated to the air group master thermostat and an average temperature is determined. When the air group master is in cooling operation, the air group member thermostats do not operate the heating system for air heating. Once the cooling system shuts off, heating is available if required. Some air group master thermostats have the ability to prevent radiant floor heating while the air heating system is operating during mild outdoor temperatures. Once the outdoor temperature falls below the first stage warm weather shut down setting, the air group member thermostats are allowed to heat if required.
Schedules
Lowering the room temperature setting reduces the amount of fuel required to heat the building, resulting in energy savings. This thermostat can follow a programmable schedule in order to automatically lower the room temperature setting. A schedule master such as a Timer 033 or a programmable tekmarNet thermostat 552, 553, 554 or 557 is required in order to gain programmable schedule functionality. When operating on a programmable schedule, a or a is shown on the display
| Display | Action |
| Programmable schedule at occupied temperature. | |
| Programmable schedule at unoccupied temperature. |
Scenes (System Override
Scenes provide an easy way to save energy while away on vacation, or override a preset schedule when plans change. tekmarNet® devices such as a User Switch 479 provide scene adjustment. This thermostat responds to the following scenes:
| Scene | Display | Room Temperature Setting |
| 1 | Follows the programmable schedule or operates at the occupied temperature | |
| 2 | Away | Away temperature |
| 3 | Unoccupied temperature |
Lock/Unlock And Access Levels
| Setting | Range | Default |
| The following settings are available when the thermostat is locked or unlocked. Press the | ||
| MODE Select heat or off. | Heat, Off | Heat |
| SET ROOM Set the room temperature while in the occupied time period. Available when a room sensor is connected. | 40 to 95°F (4.5 to 35.0°C) | 70°F (21.0°C) |
| SET ROOM Set the room temperature while in the unoccupied time period. Available when a room sensor is connected and a schedule or scenes are selected. | 40 to 95°F (4.5 to 35.0°C) | 65°F (18.5°C) |
| SET ROOM AWAY Set the room temperature while in the away scene. Available when a room sensor is connected and a schedule or scenes are selected. | 40 to 95°F (4.5 to 35.0°C) | 62°F (16.5°C) |
| SET FLOOR Set the floor temperature while in the occupied time period. Available when an auxiliary floor sensor is connected. | Off, 40 to 122°F (Off, 4.5 to 50.0°C) | 72°F (22.0°C) |
| SET FLOOR Set the floor temperature while in the unoccupied time period. Available when an auxiliary floor sensor is connected and the schedule or scenes switch settings are on. “Off” is the factory default when there are both room air and floor temperature sensors. |
Off, 40 to 122°F (Off, 4.5 to 50.0°C) | 65°F (18.5°C) or Off |
| LIGHT Select when the display backlight should operate. Auto operates the backlight for 30 seconds after a keystroke. Sun turns on the backlight. | Off, Auto, Sun, On | Auto |
| UNITS Select the temperature units. | °F or °C | °F |
| TYPE AND SOFTWARE VERSION Device Type number. Hold the button to view the software version and view any system overrides. W OVR ON: Heat relay is on for purging, exercising, flushing. W OVR OFF: Heat relay is off for DHW or setpoint priority. OPT START: Optimum start is in effect. AIR MASTR: Heat relay is off because air group master thermostat is cooling or W1 Warm Weather Shut Down in effect. |
N/A |
532 |
| ADDRESS The tekmarNet® address is shown in the large number field. The address and “Auto” are alternated when using automatic addressing. | Auto, 01 to 24, b:01 to b:24, 1:01 to 3:24 | Auto |
| Setting | Range | Default |
| SCHEDULE The thermostat can follow a shared network schedule. Select to follow either schedule master 1, 2, 3 or 4. Requires tekmarNet. | 1 to 4 | 1 |
| The following additional settings are available when the thermostat is unlocked. | ||
| SET LIMIT ROOM MAX Set the max room temperature limit while in the occupied time period. Available when a room sensor is connected. | 40 to 95°F (4.5 to 35.0°C) | 95°F (35.0°C) |
| SET LIMIT ROOM MAX Set the max room temperature limit while in the unoccupied time period. Available when a room sensor is connected and a schedule or scenes are selected. | 40 to 95°F (4.5 to 35.0°C) | 95°F (35.0°C) |
| SET LIMIT ROOM MIN Set the min room temperature limit for both occupied and unoccupied time periods. Available when a room sensor is connected, and schedule or scenes are selected. | 40 to 95°F (4.5 to 35.0°C) | 40°F (4.5°C) |
| SET FLOOR MAX Set the max floor temperature in order to protect the floor covering. Available when an auxiliary floor sensor is connected. Suggested settings: Tile = 90°F (32°C), Wood Floor = 85°F (29°C) | Off, 40 to 122°F (Off, 4.5 to 50.0°C) | 85°F (29.5°C) |
| SENSOR 1 Select the type of sensor connected to auxiliary input 1. Available when a sensor is automatically detected. | None, Room, Flor, Out | Flor |
| SENSOR 2 Select the type of sensor connected to auxiliary input 2. Available when a sensor is automatically detected. | None, Room, Flor | Room |
| ROOM SENSOR Select if the built-in room temperature sensor is on or off. The built-in room sensor can only be disabled when an auxiliary room or floor sensor is connected. | Off or On | On |
| AIR GROUP Select if this thermostat should be included in an air group to interlock heating and cooling for the group. Requires tekmarNet. | Off, 1 to 16 | Off |
| W PUMP During a heat call, select whether or not the tN4 system control’s pump should turn on or be off to allow a zone group pump per manifold. Requires a tekmarNet System Control. | Off or On | On |
| W DELAY During a heat call, select whether or not the tN4 system control’s pump should be delayed by 3 minutes to allow manifold thermal actuator zone valves to open. Requires a tekmarNet System Control or 313 Wiring Center Standalone will respect W1 thermal actuator delay setting. |
Off or On |
Off |
| ESCAPE Release the and buttons to return to the home screen. | ||
Technical Data
| TEKMARNET® THERMOSTAT 532 ONE STAGE HEAT | |
| Literature | 532_C, 532_D, 532_Q, 532_U |
| Control | Microprocessor control. This is not a safety (limit) control. |
| Packaged weight | 0.53 lb. (240 g) |
| Dimensions | 311⁄16″ 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 |
| Ambient conditions | Indoor use only, 32 to 122°F (0 to 50°C), RH ≤90% non-condensing |
| Power supply | 24 V ± 10%, 50/60 Hz, 1.8 VA standby, Class 2 |
| Relays | 24 V (ac/dc), 2 A, Class 2 circuits |
| 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, 084 |
Limited Warranty and Product Return Procedure
Limited Warranty The liability of tekmar under this warranty is limited. The Purchaser, by taking receipt of any tekmar product (“Product”), acknowledges the terms of the Limited Warranty in effect at the time of such Product sale and acknowledges that it has read and understands same. The tekmar Limited Warranty to the Purchaser on the Products sold hereunder is a manufacturer’s pass-through warranty which the Purchaser is authorized to pass through to its customers. Under the Limited Warranty, each tekmar Product is warranted against defects in workmanship and materials if the Product is installed and used in compliance with tekmar’s instructions, ordinary wear and tear excepted. The pass-through warranty period is for a period of twenty-four (24) months from the production date if the Product is not installed during that period, or twelve (12) months from the documented date of installation if installed within twenty-four (24) months from the production date. The liability of tekmar under the Limited Warranty shall be limited to, at tekmar’s sole discretion: the cost of parts and labor provided by tekmar to repair defects in materials and / or workmanship of the defective product; or to the exchange of the defective product for a warranty replacement product; or to the granting of credit limited to the original cost of the defective product, and such repair, exchange or credit shall be the sole remedy available from tekmar, and, without limiting the foregoing in any way, tekmar is not responsible, in contract, tort or strict product liability, for any other losses, costs, expenses, inconveniences, or damages, whether direct, indirect, special, secondary, incidental or consequential, arising from ownership or use of the product, or from defects in workmanship or materials, including any liability for fundamental breach of contract. The pass-through Limited Warranty applies only to those defective Products returned to tekmar during the warranty period. This Limited Warranty does not cover the cost of the parts or labor to remove or transport the defective Product, or to reinstall the repaired or replacement Product, all such costs and expenses being subject to Purchaser’s agreement and warranty with its customers. Any representations or warranties about the Products made by Purchaser to its customers which are different from or in excess of the tekmar Limited Warranty are the Purchaser’s sole responsibility and obligation. Purchaser shall indemnify and hold tekmar harmless from and against any and all claims, liabilities and damages of any kind or nature which arise out of or are related to any such representations or warranties by Purchaser to its customers. The pass-through Limited Warranty does not apply if the returned Product has been damaged by negligence by persons other than tekmar, accident, fire, Act of God, abuse or misuse; or has been damaged by modifications, alterations or attachments made subsequent to purchase which have not been authorized by tekmar; or if the Product was not installed in compliance with tekmar’s instructions and / or the local codes and ordinances; or if due to defective installation of the Product; or if the Product was not used in compliance with tekmar’s instructions. THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, WHICH THE GOVERNING LAW ALLOWS PARTIES TO CONTRACTUALLY EXCLUDE, INCLUDING, WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, DURABILITY OR DESCRIPTION OF THE PRODUCT, ITS NON-INFRINGEMENT OF ANY RELEVANT PATENTS OR TRADEMARKS, AND ITS COMPLIANCE WITH OR NON-VIOLATION OF ANY APPLICABLE ENVIRONMENTAL, HEALTH OR SAFETY LEGISLATION; THE TERM OF ANY OTHER WARRANTY NOT HEREBY CONTRACTUALLY EXCLUDED IS LIMITED SUCH THAT IT SHALL NOT EXTEND BEYOND TWENTY-FOUR (24) MONTHS FROM THE PRODUCTION DATE, TO THE EXTENT THAT SUCH LIMITATION IS ALLOWED BY THE GOVERNING LAW. Product Warranty Return Procedure All Products that are believed to have defects in workmanship or materials must be returned, together with a written description of the defect, to the tekmar Representative assigned to the territory in which such Product is located. If tekmar receives an inquiry from someone other than a tekmar Representative, including an inquiry from Purchaser (if not a tekmar Representative) or Purchaser’s customers, regarding a potential warranty claim, tekmar’s sole obligation shall be to provide the address and other contact information regarding the appropriate Representative
TEKMAR
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