PRO1 IAQ Low Voltage Thermostat: Heat or Cool, Manual, B/C/E/G/O/R/W2/Terminal Designations
The PRO1 IAQ T621-2 is a square, push-button digital thermostat for heat-or-cool applications, operating on 18V AC with manual changeover and system settings for Cool, Emergency Heat, Heat, and Off. It features an…
SKU 3G-OTH-70492
Also listed as: T6212 · T621 2
Local availability & support
- Delivery
- Worldwide DHL shipping from Singapore; 7–14 business days door-to-door for most destinations.
- Payment
- Invoicing in USD. Bank transfer (SWIFT) and corporate PO accepted.
Need installation or engineering help?
Ask a question
Product Description
The PRO1 IAQ T621-2 is a square, push-button digital thermostat for heat-or-cool applications, operating on 18V AC with manual changeover and system settings for Cool, Emergency Heat, Heat, and Off. It features an easy-access battery compartment, Auto-On fan setting, a temperature control range of 44° to 90°F, and a selectable temperature differential of 0.2°F to 2°F. Terminal designations include B, and the thermostat mounts horizontally.
Frequently Asked Questions
What is the PRO1 IAQ T621-2 thermostat used for?
The PRO1 IAQ T621-2 is a digital thermostat for heat-or-cool applications in residential or light commercial HVAC systems. It provides manual changeover between Cool, Emergency Heat, Heat, and Off, with an Auto-On fan setting. It is suitable for 18V AC systems and includes an easy-access battery compartment.
What are the specifications of the PRO1 IAQ T621-2 thermostat?
The PRO1 IAQ T621-2 operates on 18V AC with a temperature control range of 44° to 90°F and a selectable temperature differential of 0.2°F to 2°F. It features push-button controls, a square shape, horizontal mounting, and terminal designations including B. System settings are Cool, Emergency Heat, Heat, and Off with manual changeover.
Where to buy the PRO1 IAQ T621-2 thermostat worldwide?
3G Electric supplies the PRO1 IAQ T621-2 thermostat to customers worldwide. As a global industrial equipment distributor, we handle full logistics, customs clearance, and delivery to your location. Contact us for availability and lead time; we source and deliver this thermostat to meet your project needs.
How to install the PRO1 IAQ T621-2 thermostat?
To install the PRO1 IAQ T621-2, mount the thermostat horizontally on a wall, connect the 18V AC power and B terminal wiring per system requirements, and set the temperature differential (0.2°F to 2°F) and system settings (Cool, Emergency Heat, Heat, Off). Always follow local electrical codes and the manufacturer's instructions for safe installation.
Used in
Common applications for PRO1 IAQPRO1 IAQ Products
3G Electric supplies PRO1 IAQ digital thermostats. We supply genuine products with in-stock availability on common SKUs, technical documentation, commissioning support, and warranty service — worldwide.
