Tekmar Two Stage Setpoint Control 152 User Manual

Introduction

This manual provides comprehensive instructions for the installation, operation, and maintenance of the Tekmar Two Stage Setpoint Control 152. This microprocessor-based control is designed to function either as a two-stage setpoint control or as two independent setpoint controls. It supports two-stage heating, two-stage cooling, or a combined heating/cooling interlock function. When configured for independent operation, it can manage any combination of heating or cooling devices. Please read this manual thoroughly before installation and operation to ensure proper use and optimal performance.

Safety Information

WARNING: Improper installation, adjustment, alteration, service, or maintenance can cause property damage, injury, or death. Read the installation and operating instructions thoroughly before installing or servicing this equipment.

• All wiring must comply with local electrical codes and regulations.
• Disconnect power before performing any wiring or service.
• This control must be installed by a qualified technician.
• Do not operate the control with damaged wiring.
• Ensure the control is protected from moisture and extreme temperatures.

Product Overview

The Tekmar 152 control features a digital display and intuitive buttons for setting parameters. It is designed for precise temperature management in HVAC systems.

Figure 1: Front view of the Tekmar Two Stage Setpoint Control 152. This image shows the white rectangular control unit with a grey central panel. The panel includes a digital display at the top, three buttons below it labeled "Setpoint", "Differential", and "Delay", and two arrow buttons (up and down) for navigation. The Tekmar logo and model number "Two Stage Setpoint Control 152" are also visible.

Key Features:

• Pulse Width Modulation (PWM)
• Two-stage operation or independent heating/cooling control
• Control of up to two different setpoints (with additional sensor)
• Digital display for easy monitoring and adjustment

Setup and Installation

Before beginning installation, ensure all power to the HVAC system is disconnected at the main breaker.

Mounting:

1. Select a suitable location for the control, away from direct sunlight, drafts, and heat sources.
2. Mount the control securely to a wall or electrical box using appropriate fasteners.

Wiring:

Refer to the wiring diagram provided with the product packaging for specific connections. General steps include:

1. Connect the power supply wires to the designated terminals on the control.
2. Connect the sensor wires to the sensor input terminals.
3. Connect the output wires for heating/cooling stages to the appropriate terminals, ensuring correct polarity.
4. Double-check all connections for tightness and correct wiring before restoring power.

Note: Professional installation is recommended to ensure compliance with all electrical codes and optimal system performance.

Operating Instructions

The Tekmar 152 control is operated using the three main buttons and the up/down arrow buttons on the front panel.

Setting the Setpoint:

1. Press the "Setpoint" button. The current setpoint value will flash on the digital display.
2. Use the "Up" or "Down" arrow buttons to adjust the setpoint to the desired temperature or value.
3. Press the "Setpoint" button again to confirm and save the new setting, or wait a few seconds for it to save automatically.

Adjusting Differential:

The differential setting determines the temperature band around the setpoint before the control activates or deactivates a stage.

1. Press the "Differential" button. The current differential value will flash.
2. Use the "Up" or "Down" arrow buttons to adjust the differential.
3. Press the "Differential" button again to confirm.

Configuring Delay:

The delay setting prevents rapid cycling of equipment, extending its lifespan.

1. Press the "Delay" button. The current delay value will flash.
2. Use the "Up" or "Down" arrow buttons to adjust the delay time.
3. Press the "Delay" button again to confirm.

Two-Stage vs. Independent Control:

The operating mode (two-stage or independent) is typically configured during initial setup by a qualified technician. Consult your installer or the full technical manual for details on changing this mode.

Maintenance

The Tekmar 152 control requires minimal maintenance.

• Cleaning: Periodically wipe the control's exterior with a soft, damp cloth. Do not use abrasive cleaners or solvents.
• Inspection: Annually inspect wiring connections for any signs of wear or looseness. Ensure the control is free from dust and debris.
• Sensor Check: If temperature readings appear inaccurate, check the sensor and its wiring for damage.

Note: For any internal maintenance or repairs, contact a qualified service technician.

Troubleshooting

If the problem persists after attempting these solutions, contact a qualified HVAC technician or Tekmar customer support.

Specifications

• Model: 152
• Brand: Tekmar
• Control Type: Two Stage Setpoint Control
• Power Supply: Refer to product label for specific power requirements.
• Display: Digital LCD
• Control Method: Remote
• Features: Pulse Width Modulation, 2 Stage operation or heat & cool control, Control of up to 2 different setpoints (with additional sensor)
• Item Weight: Approximately 12 ounces (0.34 kg)
• UPC: 782301923430

Warranty and Support

For warranty information, please refer to the documentation included with your product or visit the official Tekmar website.

For technical support or service inquiries, please contact Tekmar customer service. Contact details can typically be found on the manufacturer's website or product packaging.

Visit the official Tekmar Store on Amazon