Initial Filling; Filter Disassembly/Assembly - STA-RITE HRPB20 Owner's Manual

Hazardous pressure.
Can cause severe in-
jury or major property
damage from tank
blow up.
Release all pressure
and read instructions
before working on filter.
Figure 3 - Fill sand bed as shown.

FILTER DISASSEMBLY/ASSEMBLY

To avoid equipment damage and personal injury, never change handle
position on control valve while pump is running.
BEFORE DISASSEMBLING FILTER:
1. STOP PUMP.
2. OPEN air release valve and drain fitting.
3. WAIT until all pressure is released and water drained from filter tank
and system before loosening clamp knobs.
Disassembly:
1. Backwash filter according to instructions under "Filter Backwash
Procedure", Page 7 (when first filling a new filter, omit this step).
2. Stop pump.
3. Open air release valve (Key No. 7, Page 10) on top of filter tank to release
all air pressure from inside of tank and system.
4. Remove filter drain plug (Key No. 19) and drain all water from tank.
5. To equalize flange stresses, loosen bolts alternately (that is, on opposite
sides of tank) around tank. Remove bolts.
6. Being careful not to damage Cord Ring (Key No. 24), lift upper tank shell
(Key No. 9) off lower tank shell (Key No. 14).
Filling Filter with Sand:
1. See Page 4 for correct sand grade and quantity.
2. Before pouring sand into filter, look inside and check internal assembly
(Key No. 12) for broken or loose laterals (Key No. 12d and 12e) caused by
shipping damage. Replace if necessary.
3. To eliminate stress on laterals fill tank half-full of water before loading
sand.
4. When full, top of sand bed should be about 12-1/2" (31.75 cm) below top
of distributor (about 1-1/2" (3.8 cm) below tank flange (see Figure 3).
5. Wash all sand and dirt away from cord ring sealing area.
6. Assemble filter according to instructions, pages 6 and 7.
Assembly:
1. Remove cord ring (Key No. 24, Page 10) slowly to avoid stretching or
tearing it.
2. Inspect cord ring for cuts, nicks, etc. If cord ring is damaged, deformed, or
has lost its resiliency, replace with a new one.
3. Clean cord ring area of tank shell (both halves) and cord ring.
4. Carefully install cord ring and upper tank shell (Key No. 9).
NOTICE: Do not lubricate cord ring. Lubricants attract dirt and grit and
may (especially when petroleum based) damage cord ring and void war-
ranty.
NOTICE: Be sure upper tank shell contacts cord ring surface evenly and
seal area is clean and free from dirt.
6