Table des matières
- Environment Inspect Clean Clean office air Every 6 months Annually Dusty / industrial Quarterly When dP +15-20 % Greasy (kitchen, booth) Monthly As needed
- Plate exchanger: Pull cores, vacuum or wash with mild detergent, rinse, dry, reassemble. Avoid high-pressure jets that bend plates. Rotary wheel: Use the manufacturer's wash cycle or soft brush; never soak the drive motor. Heat pipe: Wipe fins; check for bent tubes; verify no freeze damage seasonally. Run-around coil: Flush the glycol loop, check concentration, top up as needed.
- Pressure drop across the core vs baseline. Supply-air temperature rise vs design. Fan current (rises with clogging). Visible dust or film on plates/fins.
- Can I pressure-wash plates? Only with a wide fan nozzle at low pressure; high pressure dents plates and ruins the seal surface. How do I know it is time to clean? When measured pressure drop exceeds baseline by 15-20 % or effectiveness drops below spec.
Heat recovery equipment only delivers its rated savings if it stays clean. Dust, grease, and moisture film raise pressure drop and lower effectiveness. A simple maintenance plan protects the investment.
| Environment | Inspect | Clean |
|---|---|---|
| Clean office air | Every 6 months | Annually |
| Dusty / industrial | Quarterly | When dP +15-20 % |
| Greasy (kitchen, booth) | Monthly | As needed |
- Plate exchanger: Pull cores, vacuum or wash with mild detergent, rinse, dry, reassemble. Avoid high-pressure jets that bend plates.
- Rotary wheel: Use the manufacturer's wash cycle or soft brush; never soak the drive motor.
- Heat pipe: Wipe fins; check for bent tubes; verify no freeze damage seasonally.
- Run-around coil: Flush the glycol loop, check concentration, top up as needed.
- Pressure drop across the core vs baseline.
- Supply-air temperature rise vs design.
- Fan current (rises with clogging).
- Visible dust or film on plates/fins.
Can I pressure-wash plates?
Only with a wide fan nozzle at low pressure; high pressure dents plates and ruins the seal surface.
How do I know it is time to clean?
When measured pressure drop exceeds baseline by 15-20 % or effectiveness drops below spec.