Starting application – Great Plains NP30A 30-foot Operator Manual User Manual
Page 78
74
NP30A or NP40A
Great Plains Manufacturing, Inc.
407-502M
2014-05-20
20. Open hose inlet end valve (
, if any - tank
depicted has no hose valves). Check for leaks and
open valves. Expect NO ammonia odor at this time.
21. Open hose outlet end valve (
, if any - tank
depicted has no hose valves). Check for leaks. In an
all-Great Plains configuration, if there has been no
odor so far, there should be no odor now, as flow is
blocked at the On/Off valve
(not visible).
Refer to Figure 63
22. At the meter gauges, pressure gauge
read within 5 psi
a
of the nurse tank gauge. The flow
divider gauge
should be zero. The temperature
gauge
is likely to be below ambient.
Starting Application
23. Enter the tractor cab.
24. Check the emergency shut-off rope. Make sure you
know where it is. Make sure the rope cannot slip
away. Leave enough slack in the line for field turns
and uneven ground.
Refer to Figure 64
25. At the console, set the POWER switch ON.
26. Set the MASTER switch to ON.
27. Set the BOOMS 1 or BOOMS 1,2 & 3 switches on to
ON.
28. Select the desired RATE preset.
29. Lower applicator to operating depth (if not already
lowered) and begin first pass.
NH
3
: Possible Chemical Hazard:
Anhydrous ammonia is now flowing into the ground. Some
routinely escapes to the atmosphere. Check for leaks. Take
action if strong odor is detected or a leak seen. Turn up wind.
Turn off flow. Check gauges from tractor cab. Engage
emergency shut-off valve if a leak is detected.
Minor odor during application is normal, particularly if the
tractor cab is ever down wind of recent passes.
Strong or irritating odor indicates a problem. Conditions
may not be suitable for application (soil too dry, cloddy
and deeply cracked, for example), or there may be a
system problem.
a. This 5 psi correlation is only true under no-flow conditions. When NH
3
application begins, the pressure reading at the cooler gauge
drops, due to the reduced temperature of the cooled fluid, and pressure losses due to flow in plumbing.
Figure 63
Line-Up Gauge Check
31587
A61a
A61b
Figure 64
Typical Application Screen
31585