Isoguard Select ™ System - Graco HFR Setup And Operation

Maintenance
IsoGuard Select
Check the condition of the IsoGuard Select filter and
fluid weekly. Replace the filter if it becomes clogged with
debris or gel. Change the fluid if it becomes a gel, its
color darkens, or it becomes diluted with isocyanate.
Gel formation is due to moisture absorption by the
IsoGuard Select fluid.
The interval between filter replacement and fluid change
depend on the environment in which the equipment is
operating and equipment run time. The pump lubrication
system minimizes exposure to moisture, but some
contamination is still possible.
Fluid discoloration is due to seepage of small amounts
of isocyanate past the pump packings during operation.
if the packings are operating properly, IsoGuard Select
fluid replacement due to discoloration should not be
necessary more often than every other month.
To replace IsoGuard Select filter:
1. Perform Pressure Relief Procedure on page 44.
2. Close air supply ball valve (RA) to Husky
Diaphragm pump.
3. Open IsoGuard Select reservoir lid (LR).
4. Remove bag filter. A hook may be used to grab the
bag filter strap.
5. Replace bag filter (Part 125148). Cleaning and
reusing the filter bag is not recommended.
6. Close IsoGuard Select reservoir lid (LR) and open
air supply ball valve (RA). Verify the Husky
Diaphragm pump regulator (RB) is set to 35 psi.
This will return the IsoGuard Select system to circu-
lation mode.
To change the IsoGuard Select fluid:
1. Perform Pressure Relief Procedure on page 44.
48
™
System
2. Close air supply ball valve (RA) to Husky
Diaphragm pump.
RA
RB
F . 26: IsoGuard Select Fluid Reservoir and Air
IG
Controls
3. Place waste container below IsoGuard Select
reservoir drain (RD).
4. Open the IsoGuard Select reservoir lid (LR).
5. Remove drain plug and open drain valve (RD) which
will drain the IsoGuard reservoir.
6. Remove bag filter and discard.
7. Remove filter basket and clean thoroughly. Clean
IsoGuard reservoir thoroughly.
8. Remove pump outlet line (RE) from the Husky
Diaphragm pump and place in a waste container.
This will drain the remaining IsoGuard fluid from the
IsoGuard Select fluid cylinder. See F
LR
RC
RD
. 26.
IG
3A2797R