BỘ ĐIỀU KHIỂN NHIỆT ĐỘ PHÒNG HONEYWELL TF428 Series Digital Thermostat

BỘ ĐIỀU KHIỂN NHIỆT ĐỘ PHÒNG HONEYWELL TF428 Series Digital Thermostat
Mã sp: TF428
Nhà sản xuất:Honeywell/USA
Mã sản phẩm: TF428
Giá: Liên hệ
Lượt xem: 7796
2-pipe cool only/heat only/manual changeover - 4-pipe cool/heat manual /automatic changeover - Ventilation mode - Manual or automatic 3-speed fan control - Water valve control

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TF 428 Series Digital Thermostat xuất xứ Honeywell - USA

Features
- Memorized time off
- Cycle Per Hour (CPH)
- Random startup
- Remote temperature sensor optional
- Energy saving mode optional
- LCD display with simple user interface
- Room temperature or setpoint temperature display
selectable
- Manual or automatic fan speed selectable
- Temperature units in either °C or °F
- User setting can be stored with power loss
- Freeze protection available
- Four keypad lock options
- Heating and cooling setpoint limitation

Specifications
Power supply: 220/230VAC, 50/60Hz
Control: PI, On/off output
Accuracy: ±1°C at 21°C
Protection class: IP20
Set point range: 10 ~ 32°C
Display range: 0 ~ 37°C
Ambient operating limits: -18~ +49°C
Ambient storage limits: -30 ~ +64°C
Humidity limits: 5~90% RH, non-condensing
Remote temperature sensor: NTC20K
Action Type: 1
Pollution Degree: 2
Protection against electric shock class: Class II
Electronic control software class: Class A
Rated Impulse Voltage: 2500V
Maximum Temperature:155°C
Relay wiring
Wire Diameter (Recommendation): 1~1.5mm
Applied altitude up to 2000m above sea level
Rating Capacity
Working current for the whole product : 4(3)A
4A: When the load of the thermostat is resistance
3A: When the load of the thermostat is inductance
For Fan load 4(2)A
4A:when the load is resistance; 2A:When the load is inductance
For Valve load 2(1)A
2A: when the load is resistance;1A: when the load is inductance
The valve need have overtravel-limit organ to turn off the load.