Great Plains NP3000A Operator Manual - Manual (Page 67)

Great Plains Manufacturing, Inc. Table of Contents Index Operating Instructions 63
2014-04-22 Table of Contents Index 407-613M
NH
3
: Suspending Application
These instructions are for brief stops in the field, for
example, to make a phone call. See also “NH3:
Stopping Application” on page 64.
a. What is the wind direction?
b. Turn MASTER switch OFF.
This turns On/Off Valve
off.
With On/Off off, there is still a substantial amount of
liquid NH
3
downstream of all valves, in the flow divider,
row application tubing, and row applicators. When
stopped, in ground, this slowly warms, vaporizes, and is
expelled into the soil. See warning at right.
c. Continue field application until the Flow Divider
pressure gauge
reads zero. Wait at least
another 5 minutes.
d. Turn up-wind.
e. Leave the applicator in the ground. There is still
considerable NH
3
vapor in the lines that are open to
the soil. There may also be a modest amount of
liquid in cold tubing loops.
NH
3
: Field Turns
a. Before the turn,
set the MASTER switch OFF.
Leave the applicator in the ground, and
continue forward movement.
b. Lift the applicator (page 48) at the turn point.
Major Spill / Equipment Damage Hazards:
Do not turn too tightly. The nurse tank could strike the
applicator, be upset, and leak. On 2-Point and Pull-Type, the
nurse tank tongue could strike the caster tires. On 3-Point, the
nurse tank tires could strike sealers or tine shanks.
c. Turn up-wind for the next pass.
d. Line up per your start of pass plan.
e. Lower the applicator into the ground.
f. Set the MASTER switch ON.
g. Pull forward and complete the pass.
Choking Hazard:
Never raise a recently operated applicator when you are
down-wind of the applicator. Be facing up-wind or turn
up-wind if it is necessary to raise a working applicator. Wear
your goggles. A substantial amount of anhydrous ammonia is
rapidly released if you do not allow time for it to bleed off
underground. The concentration could be high enough to
cause irritation, breathing difficulty or asphyxiation.
A31
A31
A42
Ammonia Vapor Release Occurs at Turns:
Avoid down-wind turns.
Do not raise for turns if unprotected individuals or sensitive
livestock are immediately down-wind of the turn. Stop instead.
Turning off NH
3
flow prior to raising for turns does deplete
some of the liquid ammonia in the delivery lines, but not all of
it, and considerable vapor remains. At turns, there will be
some release of NH
3
vapor, and possibly some NH
3
liquid.
Be prepared for it. Minimize exposure to yourself and others.
Turn up-wind immediately if a hazardous concentration of
fumes reaches the tractor cab.