低限防冻保护开关，保护空气处理系统中的冷却盘管，防止结霜。恒温器和它的毛细传感元件通过感应毛细任意一英尺截面上的最低温度来提供防冻功能。DPDT手动或自动复位继电器向楼宇管理系统发出信号，并切断风机。该系列DFS2将检测低于固定安全值(设定值)的温度，该设定值可通过可视设定点指示器和设定点螺钉设置为低至34°F(1°C)
Sensing Element:Vapor-filled capillary.
Operating Temperature:14°F to 54°F (-10°C to 12°C).
Storage Temperature:14°F to 158°F (-10°C to 70°C).
Capillary Overload Temperature:392°F (200°C), maximum 60 minutes.
Humidity Limit:0 to 95% RH, non-condensing.
Enclosure:Galvanized steel base, ABS cover.
Enclosure Rating:NEMA 1 (IP40).
Capillary Material:Copper.
Cable Entry:(1) M20 compression fitting.
Reset Action:Available in automatic or manual reset options.
Low-level Setpoint:Factory Set: 39°F (4°C), and safety lock secured; Adjustment via screwdriver slot.
Wire Connection:Terminal with wire-retaining screws.
Wire Size:Max. 14 AWG.
Electrical Rating:24 to 250 VAC, 15 (8) A.
Electrical Connections:Two each NO/NC/Common.
Deadband:1.8°F (fixed).
Weight:1.6 lb (0.7 kg).
Agency Approvals:CE.
| Model |
Description |
| DFS2-DA10 |
Low limit temperature control, 10 ft capillary with automatic reset |
| DFS2-DA20 |
Low limit temperature control, 20 ft capillary with automatic reset |
| DFS2-DM10 |
Low limit temperature control, 10 ft capillary with manual reset |
| DFS2-DM20 |
Low limit temperature control, 20 ft capillary with manual reset | |
