Heath Consultants Detecto-Pak 4 (DP) - Manual (Page 39)

MAINTENANCE
100786-0 Rev. D 05/09
32
3. PORTABLE UNIT WILL NOT OPERATE FOR FULL EIGHT
HOURS
a. The fuel cylinders may not have been filled to recommended
pressure (1,750 psig maximum). Try refilling the cylinders.
b. There may be a leak between the fuel cylinder valve and regulator.
Check “O” ring on valve stem.
c. The rechargeable battery may not have been fully charged. Recharge
battery per instructions in Chapter Four.
B. FILTER REPLACEMENT
1. Unscrew bottom half of white plastic filter housing.
2. Remove old filter and “O” ring. Gently tap housing upside down on
a hard surface (table), if necessary, to remove residual pieces of filter.
Inspect inside both halves of filter housing and remove any trapped
dust or debris.
3. Insert “O” ring and then new filter into bottom half of filter housing.
Smoother side of filter should be right side up or visible.
4. Replace bottom half of white plastic filter housing and tighten.