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PRO1 IAQ T621-2 Digital Thermostat, Manual Heat/Cool, 18V AC - Digital Thermostats
PRO1 IAQDigital Thermostats

PRO1 IAQ T621-2 Digital Thermostat, Manual Heat/Cool, 18V AC

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

Brand
PRO1 IAQ
Item
T621-2 Digital Thermostat, Manual Heat/Cool, 18V AC
Category
Digital Thermostats
Available to Order
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Technical specs
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Local availability & support — the Philippines

Delivery
5–8 business days door-to-door; Bureau of Customs clearance typically 2–4 business days.
Payment
Invoicing in PHP or USD. Bank transfer and corporate PO accepted.
Ships to
Manila, Quezon City, Cebu, Davao, Batangas

Technical Specifications

PRO1 IAQ
Manufacturer Part Number
T621-2
Type
Manual, B/C/E/G/O/R/W2/Terminal Designations, Auto-On
Shape
Square
Voltage
18V AC
Digit Size
Easy Read
Application
Heat or Cool
Control Type
Push Button
Fan Settings
Auto-On
Key Features
Easy Access Battery Compartment
Changeover Type
Manual
System Settings
Cool-Emergency Heat-Heat-Off
Mounting Direction
Horizontal
Terminal Designations
B
Temperature Differential
0.2°F to 2°F
Temperature Control Range
44° to 90°F

Technical Documents

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PRO1 IAQ Products
3G Electric (S) Pte. Ltd. — Singapore

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.

Supplied to the Philippines — compatible with 60 Hz installations. DHL Express delivery to Manila, Quezon City, Cebu, customs and duties handled door-to-door.

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 IAQ
Commercial HVAC maintenance — PRO1 IAQ T855SH thermostat for multi-stage heat pump control in office buildings
Facility energy management — PRO1 IAQ T805 programmable thermostat for 7-day scheduling in retail spaces
Light commercial retrofit — PRO1 IAQ T501M analog thermostat for simple heat/cool control in small shops
Indoor air quality monitoring — PRO1 IAQ R751WO wireless sensor for temperature and motion detection in conference rooms
Heat pump system replacement — PRO1 IAQ T625-2 thermostat for 2H/1C heat pump staging in residential units
Thermostat guard replacement — PRO1 IAQ T150K replacement keys for securing T150 plastic guards in public areas

PRO1 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.

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