Maintenance
This equipment is mainly for national defense readiness. If it will not be used after commissioning, remove the hand crank and store it properly near the fan.
Do not run the motor for a long time or start it frequently when the fan is not connected to pipelines.
Inspect the motor insulation resistance every humid season. If the reading is below 2 MΩ, dry the motor thoroughly before reuse.
The fan shall only rotate in the designated forward direction.
Installation Instructions
Before installation, test the motor insulation with a 500V megohmmeter; the insulation resistance shall be no less than 2 MΩ. Check if the three-phase resistance is balanced, all parts are securely fastened and the fan rotates flexibly. Eliminate looseness or friction issues if found. Fill engine oil up to the midline of the oil sight glass to ensure the lower part of the duplex gear is submerged in oil.
The fan can be suspended to the ceiling of the civil defense structure with two long bolts or mounted on a foundation. The height from the ground to the center of the crank is normally 0.9–1.05 meters. In accordance with ventilation system drawings or professional design layouts, connect the air inlet to gas-filtering ducts and general ventilation ducts, and link the air outlet to a flow meter (or Model FX-1 air flow indicator) and indoor pipelines.The weight of the filter, flow meter, pipelines and valves shall not be imposed on the fan. Do not over-tighten bolts to avoid fan distortion. Ensure no contact or friction between the impeller and stationary components after installation.
The rotation direction of the motor and hand crank must comply with the markings on the product.
Conduct pipeline resistance commissioning after installation, and verify that the air volume meets design requirements in both gas-filtering and general ventilation modes.
Main Technical Parameters
| Parameter | F270-1 | F270-2 |
|---|---|---|
| Air Flow (m³/h) | 300–700 | 500–1000 |
| Total Pressure (Pa) | 1117–568 | 1205–568 |
| Shaft Speed (r/min) | 2800 | 2800 |
| Rotation Direction (view from motor end) | Clockwise | Clockwise |
| Motor Type | YS7132 | YS7132 |
| Rated Power (kW) | 0.75 | 0.75 |
| Rated Voltage (V) | 380 | 380 |
| Rated Current (A) | 1.65 | 1.65 |
| Hand Crank Mechanism | Enclosed two-stage cylindrical gear drive, gear ratio 1/8 × 1/8. Hand crank speed: 44 r/min, swing radius: 280 mm, connected to the main shaft via an automatic clutch. | |
External Dimensions
| Parameter | F270-1 | F270-2 |
|---|---|---|
| External Dimensions (L×W×H, mm) | 821 × 545 × 417 | 830 × 545 × 417 |
| Outlet Size (mm) | Φ150 | Φ200 |
| Weight (excluding oil, kg) | 38 | 40 |
