Smart Air Conditioner Home Thermostat Digital Non programmable Thermostat
STN1220 sits between a fully programmable and a fully manual thermostat. It is non-programmable in the sense that there is no weekly schedule, but it holds four time and four temperature settings under WAKE, LEAVE, RETURN and SLEEP, which repeat every day. The differential is adjustable from 0.2 to 2.0 F, the fan switch offers AUTO or ON, and a low battery indicator appears below 2.7 V when no 24V supply is present.
Key Benefits
- Four daily periods without the complexity of a weekly schedule
- Differential adjustable from 0.2 to 2.0 F, so cycle rate can be tuned to the plant
- AUTO or ON fan switch gives continuous circulation when required
- Low battery warning below 2.7 V prevents silent failure
- 1 amp per terminal with 1.5 amp combined covers typical split system loads
Problems It Solves
- Weekly schedules that are overkill for a constant daily routine
- Fixed differentials causing overshoot or short cycling
- Batteries failing without warning in rooms with no 24V supply
- Stale air in rooms where the fan only runs on a call
Who It Is For
- Hotel and apartment operators
- Air conditioning distributors
- Installers tuning systems that overshoot or short cycle
- OEM buyers wanting a four period model in their range
Technical Features
- Non-programmable with 4 times and 4 temperatures: WAKE, LEAVE, RETURN and SLEEP
- 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 F under 68 F
- Heat / OFF / Cool system switch with a differential adjustable from 0.2 to 2.0 F
- Fan switch AUTO or ON
- Load rating 1.0 amp per terminal, 1.5 amp maximum all terminals combined
- Power supply 24 VAC (18 to 30 VAC), 50/60 Hz or 2 x AAA 1.5V alkaline batteries
- Low battery indicator under 2.7 V, 120 x 98 x 28 mm, backlight blue, green or white
Specifications
| Model | STN1220 |
| Programmability | Non-Programmable: 4 times / 4 temp,“WAKE” “LEAVE” “RESTRN” “SLEEP” Low battery indicator Under 2.7 V (without 24V power supply) |
| Stages | 2 Heat / 2 Cool |
| System Switch | Heat/OFF/Cool Differential 0.2 to 2.0℉ |
| Switchable Voltage | 24 VAC(18 to 30 VAC), 50/60 Hz 2*AAA 1.5V Alkaline batteries power |
| Load rating | 1.0Amp per terminal, 1.5Amp maximum all terminals combined Fan Switch AUTO/ON |
| Temperature Range | 32℉ to 99℉ (1℃ to 40℃) |
| Setpoint Range | 44℉ to 90℉ (7℃ to 32℃) |
| Display accuracy | ±1℉(under 68℉) |
| Differential | 0.2 to 2.0℉ |
| Backlight | Blue/Green/white |
| Color | White |
| Dimension | 120 x 98 x 28 MM |
| Installation | Surface Mounting Dispaly 4.6 sq.Inch |
| Application | Hotel, Apartment |
| Type | Air Conditioning |
| Warranty | 1 Year |
| After-sale Service | Online technical support, Onsite Installation, Onsite Training, Onsite Inspection, Free spare parts, Return and Replacement, Other, NONE |
Specifications are taken from the manufacturer data for this model. Confirm the exact configuration with us before you order.
Application Scenarios
- Hotel rooms with a repeating daily occupancy pattern
- Apartments where the same routine runs seven days a week
- Air conditioning systems needing continuous fan circulation
- Rooms where a tight differential is needed to hold temperature
Quality Control
- Differential range verified from 0.2 to 2.0 F on batch samples
- Low battery threshold checked at 2.7 V
- All four period settings exercised during the functional test
Customisation Options
- Default period times and temperatures preset for the buyer
- Backlight blue, green or white
- Front label and logo to the buyer's artwork
- Manual and carton in the buyer's language and format
How It Compares
Installing And Commissioning
Step 1
Land the conductors and check the combined load stays within 1.5 amp
Step 2
Fit 2 x AAA batteries or wire at 24 VAC where a common wire exists
Step 3
Set the WAKE, LEAVE, RETURN and SLEEP times and temperatures
Step 4
Adjust the differential between 0.2 and 2.0 F to suit the plant
Step 5
Choose AUTO or ON for the fan and confirm both modes run
Smart Air Conditioner Home Thermostat Digital Non programmable Thermostat: Buyer Questions
Does the STN1220 have a weekly schedule?
No. It holds four times and four temperatures under WAKE, LEAVE, RETURN and SLEEP, and the same pattern repeats every day.
Can the switching differential be changed?
Yes, from 0.2 to 2.0 F, which lets you tune cycle rate to the equipment.
What warns me before the batteries fail?
A low battery indicator appears below 2.7 V when there is no 24V supply.
What is the maximum load?
1.0 amp per terminal and 1.5 amp maximum across all terminals combined.
Does the fan run continuously?
It can. The fan switch offers AUTO or ON.
What are the dimensions?
120 x 98 x 28 mm.
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