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products/5746e202c5b64_sku_1110120_webimage___1464263170_JVS24_syvatty_5e9c_ffda9cd9-9a31-4627-b7a1-5ad155eb1bf6.png
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FAQs - Frequently Asked Questions
FAQs - Frequently Asked Questions
- Regular price
- $152.00
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Frost Guard JVS 24
Application: The JVS 24 serves as a safety device for air handling units, safeguarding water radiators against freezing. It is designed to be mounted on a 35 mm DIN-rail, with plug connectors for easy service and commissioning. At commissioning, the sensor type can be selected from PTC1000/2000 Ω, Pt1000, or Ni1000-LG by coding connectors S1 to S3 on the circuit card behind the front plate.
Function:
- Running Time: When the unit is ON, the JVS 24 continuously monitors and, if necessary, controls the temperature of the return water from the radiator. It uses a TEV sensor to detect temperature, transmitting the signal to the control system. As the temperature approaches the alarm set point (within the restriction range), the frost guard adjusts the control system signal to the actuator (indicated by a green light). If the temperature drops below the alarm set point, the JVS 24 stops the unit operation and activates an alarm (indicated by a red light). The alarm can be reset using the Reset button or by interrupting the power supply.
- Stand-by Time: When the unit is OFF, the JVS 24 controls the temperature of the return water to meet the set point of the Unit Off Temperature.
Attention: A temperature exceeding 130°C or a faulty sensor circuit (cut or short circuit) triggers an alarm, causing the JVS 24 to fully open the actuator (control valve). Disrupting the supply voltage to the JVS 24 stops the air handling unit operation and activates an alarm.
Technical Data:
- Supply: 24 Vac/dc, 2 VA
- Connectors, Plug: 2.5 mm²
- Control Relay (NC Contact): 8 A / 230 Vac
- Alarm Relay (NO Contact): 1 A / 60 V
- Sensor Type: Selectable, Pt1000 factory setting
- Alarm Setting: 0…+16°C
- Start Point of Restriction: 3…16°C above alarm set point
- Span of Restriction: 1…8°C
- Return Water Temperature Output: 0…100°C = 0…10 V
- Master Control Signal (TC in): 0…10 Vdc
- Actuator Signal (TV out): 0…10 Vdc
- Faulty Sensor Alarm: > 130°C temperature or cut/short sensor circuit
- Housing: IP 20
- Dimensions (w x h x d): 53 x 90 x 59 mm
Part Numbers:
JVS 24 - Adjusting Frostguard (Pt/Ni)1000
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