Overview

The document describes the Growmate Micro Grow system by Micro Grow Greenhouse Systems, Inc., a precision microprocessor-based controller designed for greenhouse environmental management. It provides cost-effective control of heating, cooling, and air circulation with programmable day, night, and differential temperature settings.

Main Features

• Control Modes: Day, Night, and Differential (DIF) modes for temperature management.
• Outputs: Three cooling stages, two heating stages, and one air circulation stage (user selectable).
• Manual/Automatic Operation: Front panel toggle switches allow easy switching between manual, off, and automatic modes for each output.
• Display and Indicators: Large, easy-to-read 6-segment LCD display with high visibility and lighted status indicators (high intensity LEDs) for all programming functions and outputs.
• Programming: Front panel toggle switches for simple programming and setting adjustments.

Technical Specifications

• Temperature Accuracy: ±1.0°F (±0.7°C).
• Temperature Settings: User selectable temperature separation and differential settings of 1, 2, 3, or 4 degrees.
• Time Delay: User selectable delays of 2, 10, 30, or 60 seconds to prevent rapid cycling.
• Temperature Units: Selectable between Fahrenheit and Centigrade.
• Power and Outputs: Operates on 24 VAC with 24 VAC outputs for greenhouse equipment connections.
• Enclosure: Weatherproof, lockable enclosure with clear cover for protection and visibility.
• Physical Dimensions: 8.5 inches wide x 10.5 inches high x 5.5 inches deep.

System Components and Connections

• Sensors: Air temperature sensors and photocell for night detection.
• Relay Outputs: Separate relays for each cooling and heating stage and air circulation.
• Power Supply: Requires a 24 VAC power source and common connections for all loads.

Operational Highlights

• Separate day and night temperature control allows optimized environmental conditions for plant growth cycles.
• Differential mode helps maintain temperature stability by controlling the temperature difference before activating heating or cooling.
• Manual override switches provide flexibility for maintenance or special conditions.
• Lighted indicators provide clear visual feedback on system status and active outputs.

Best Practices and Recommendations

• Use the time delay feature to avoid short cycling of heating and cooling equipment, extending equipment life.
• Select appropriate temperature separation and differential settings based on greenhouse size and plant requirements.
• Ensure proper installation of air temperature sensors and photocell for accurate environmental monitoring.
• Keep the enclosure locked and protected from weather to maintain system reliability.

Summary

The Growmate Micro Grow controller is a robust, user-friendly solution for managing greenhouse climate through precise temperature control and air circulation. Its multiple stages of heating and cooling, combined with programmable modes and manual overrides, provide growers with flexibility and reliability. The system’s weatherproof design and clear visual indicators support ease of use and maintenance in greenhouse environments.