User's Manual

Maintenance
P/N 81-CO2MAN-001 6-5 September 2013
Figure 6-2. Carbon Dioxide Cylinder Weighing Scale
4. Use the adjustment sleeve of the weighing scale assembly to bring the beam to the initial
position. The initial position must be determined to allow the cylinder to be suspended
freely when the beam is pulled down towards the horizontal position. Free suspension
should move the cylinder just free from its supporting surface when the beam is pulled
down using the finger grip ring.
5. Pull down on finger grip until cylinder is just clear of floor and lever is horizontal.
6. Read the weighing scale. One division between two lines represents 10 lb. (4.5 kg) of
weight. The weighing scale measures weights between 50 and 300 lbs. (23 and 136 kg).
The scale is calibrated to compensate for leverage. The empty cylinder weight is stamped
on the cylinder valve body.
7. From the scale reading, deduct the empty cylinder weight and deduct the discharge head
weight of 3.75 lbs. (1.7 kg). The resulting weight is the amount of carbon dioxide (charge
weight) within the cylinder.
8. The charge weight shall not deviate more than 10 percent (10%) from the net content of
the cylinder. For example, the weight of a cylinder filled with 100 lb. (45 kg) of carbon
dioxide shall not deviate more than 10 lb. (4.5 kg) (after subtraction of the weight of the
discharge head) from the full weight stamped on the valve body.
9. If the CO
2
weight loss exceeds 10%, forward charged cylinder with discharge and control
heads removed and safety cap and cylinder protection cap installed, to a Kidde Fire
Systems distributor for recharge.
10. After all cylinders have been weighed, tighten clamps, and reinstall control heads on
cylinders. Tighten control head coupling nuts securely.
6-4.2 Weighing (without Kidde Fire Systems Weigh Scale)
1. Remove CO
2
cylinders following procedures detailed in Paragraph 6-8.
2. Weigh cylinder(s) on platform scale. Empty cylinder weight is stamped on cylinder valve
body. Remove the cylinder protection cap only during weighing. This cap is not included in
the empty weight of the cylinder.
3. If CO
2
weight loss exceeds 10% forward charged cylinder, with cylinder protection cap and
valve protection caps installed, to a Kidde Fire Systems distributor for recharge.
21 in.
(533 mm)
NOT INCLUDING CLEARANCE FOR
OPERATOR
ADJUSTMENT SLEEVE
WEIGHBAR
BEAM
DISCHARGE HEAD
YOKE
CARBON DIOXIDE CYLINDER
FINGER GRIP
RING
SCALE IS
CALIBRATED IN
POUNDS
POINTER INITIAL
POSITION
FINAL POSITION
WEIGHING SCALE
8-1/4 in. (210 mm) DIA.
ROTATED 90 DEGREES
FOR CLARITY
INITIAL POSITION