SECTION 9—SIEVE BEDS
45
Perfecto
2
™
SECTION 9—SIEVE BEDS
Replacing Sieve Beds
DANGER
To prevent electrical shock, AWAYS disconnect concentrator from electrical outlet
before servicing.
NOTE: For this procedure, refer to FIGURE 9.1 on page 46.
NOTE: ALWAYS replace sieve beds in pairs to ensure that both beds are in optimum condition.
1. Unplug unit.
2. Remove cabinet. Refer to Removing Cabinet on page 23.
3. Remove compressor inlet HEPA filter. Refer to Replacing the Compressor Inlet HEPA
4. Remove tie wraps and disconnect P.E valve tubing and check valve tubing from top of
sieve beds.
5. Remove the four large tie-wraps (two on each sieve bed).
6. Tilt sieve beds back and lift up. Rest sieve beds on rear of base.
7. Using a hose clamp tool, remove the clamp and reinforced tubing from bottom of both
sieve beds and remove sieve beds.
CAUTION
DO NOT remove plastic caps from new sieve bed fittings until ready to install new beds.
Severe sieve contamination can occur if uncapped beds are exposed to air.
8. Remove plastic caps from the top and bottom fittings of the new sieve beds.
9. Install new sieve beds reversing STEPS 3-7.
NOTE: After replacing sieve beds, retiming is necessary. Refer to Timing on page 74.
10. Run unit and check for leaks. Refer to Leak Test on page 77.
11. Reinstall cabinet. Refer to Removing Cabinet on page 23.
