Model 3205 white 24V air conditioner controller with LED backlit display

Air Conditioner Thermostats HVAC Thermostat Electric and Gas Thermostat Programmable Thermostat

White 24V 1 Heat 1 Cool Air Conditioner Controller Heat Pump Thermostat for HVAC System

Name: White 24V 1 Heat 1 Cool Air Conditioner Controller Heat Pump Thermostat for HVAC System
Brand: Smart Therm

This is model 3205 supplied in its 5/1/1 configuration with a factory pre-set programme, aimed at hotel projects where every room should arrive working. It controls 1 heat and 1 cool, keeps separate B and O terminals for heat pump reversing valves, and offers separate heating and cooling swing adjustments plus a selectable 5 minute compressor delay. The backlight is LED and the warranty runs to 2 years.

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Key Benefits

Factory pre-set programme means no room-by-room commissioning
Separate B and O terminals suit both reversing valve conventions
Separate heating and cooling swing adjustment tunes cycle rate per mode
LED backlight with contemporary styling for guest rooms
2 year warranty on this configuration

Problems It Solves

Commissioning time multiplied across hundreds of rooms
Reversing valve wiring limited to one convention
Identical cycle rates in heating and cooling causing complaints
Compressor restarts too soon after a supply interruption

Who It Is For

Hotel developers fitting out at scale
HVAC contractors on large rollouts
Distributors stocking a pre-programmed option
OEM buyers wanting a 2 year warranty single stage stat

Technical Features

24V single stage control, 1 heat and 1 cool, 5/1/1 programmable
Factory pre-set programme
Temperature range 32 F to 99 F (1 C to 40 C), setpoint range 44 F to 90 F (7 C to 32 C)
Display accuracy +/-1 C at 20 C
Electric or gas configurable with separate B and O terminals
Separate heating and cooling swing (cycle rate) adjustments, room temperature calibration
5 minute compressor delay protection, selectable on or off
Power supply batteries or 24V, LED backlight, ABS and PC housing, RoHS CE ISO

Specifications

Model	3205
Programmability	5/1/1 Programmable
Stages	1 Heat / 1 Cool
Power Supply	24V or Battery
Temperature Range	32℉-99℉ (1℃-40℃)
Setpoint Range	44℉-90℉ (7℃-32℃)
Display accuracy	±1°C (at 20°C)
Backlight	LED
Color	White
Material	ABS+PC
Application	Hotel
Type	HVAC System/Heating/Air Conditioning
Function	Ventilaion
Certification	RoHS CE ISO
Warranty	2 years
After-sale Service	Online technical support, Return and Replacement
MOQ	500pcs Package Carton Box

Specifications are taken from the manufacturer data for this model. Confirm the exact configuration with us before you order.

Application Scenarios

Hotel rollouts where hundreds of rooms are fitted at once
Heat pump systems needing a reversing valve output
Air conditioning installations with a heating stage
Projects where installers should not have to programme each unit

Quality Control

Pre-set programme verified on every unit before packing
Heat and cool outputs exercised on the line
Compressor delay timing checked on batch samples

Customisation Options

Pre-set programme written to the buyer's specification
Swing and delay defaults set for the buyer's equipment
Front label, logo and housing marking
Carton packing to the buyer's format

Comparison

How It Compares

The 7 day version of model 3205

This configuration ships 5/1/1 with a factory pre-set programme, so rooms are ready without commissioning.

Model 3105

3205 is single stage, which is the correct choice when the plant has one heating and one cooling stage.

Use guide

Installing And Commissioning

Step 1

Isolate the 24V control circuit and land the conductors

Step 2

Select electric or gas configuration and set B or O as required

Step 3

Check the pre-set programme matches the room's occupancy

Step 4

Adjust heating and cooling swing separately if needed

Step 5

Enable the 5 minute compressor delay and test both modes

Answers