Raven AccuFlow HP+, Installation And Operation Manual, Page: 13 / 98

Important Information: Discharging the AccuFlow™ system 9
IMPORTANT INFORMATION
TABLE 1.
Example System Components
NOTE: Equipment configurations may vary. Figure 1 on page 8 is an example diagram of an anhydrous
ammonia (NH
3
) system. Operators must familiarize themselves with the system, bleed valve locations,
and procedures before charging the system with NH
3
.
7. Completely close the emergency shut-off valve. The valve may be closed by either pulling the rope from the
cab of the tractor or turning the handle at the valve mounted on the AccuFlow cooler.
8. Bleed and disconnect the nurse tank supply hose from the nurse tank.
9. While standing upwind from the implement, with the wind direction as shown in Figure 1 on page 8, slowly
open the AccuFlow system primary bleed valve until it is fully open. NH
3
will discharge from the vapor knives
on the toolbar.
NOTE: Always bleed system pressure slowly by leaving valves open slightly over an extended period of time.
10. Remain at the primary bleed valve and adjust or close as necessary until NH
3
(gaseous cloud) is no longer
being released at the vapor knives. After the cloud has dispersed, check the pressure and temperature gauges
to verify that the pressure reads zero and all parts are at an ambient temperature (not frosted over).
11. Open the secondary bleed valve slowly to relieve any remaining liquid NH
3
from the system.
12. Recheck and verify that the pressure gauge on the AccuFlow manifold reads zero and that all AccuFlow
components are not cold to the touch before opening the system.
NOTE: If you are still unsure if the system pressure has been bled off, verify the supply or nurse tank shut-off
valves are closed, all bleed valves are open, slowly open the emergency shut-off valve, and repeat the
steps above prior to starting any service or maintenance.
Component Description
1 Nurse Tank Main Shut-off and Bleed Valves (At Bulkhead or Withdrawal Valve)
2 Supply Hose Bleed Valves and Breakaway Couplers
3 AccuFlow System Emergency Shut-off Valve and Rope to Tractor Cab
4 AccuFlow System Primary Bleed Valve
5 AccuFlow System Secondary Bleed Valve
6 AccuFlow System Pressure and Temperature Gauges
7 Bleeder on Check Valve
8
Bleeder on Strainer
1
1. Some systems may feature more than one strainer.
DANGER
Stand ‘up wind’ when working around NH
3
and
related equipment. Never work on NH
3
equipment in confined spaces. Always keep NH
3
equipment away from buildings, livestock, and
other people.