
NP2540
Operating Instructions
59
2019-04-12
417-459M
NH
3
: Safing Applicator Before Cart Hitch
Close Line Valves
1. If any emergency shut-off valve
is open, use the
rope to close it. This also tests the rope and path.
2. Close solenoid valves:
NH
3
: Check Hydrostatic Relief Valves
3. Check that the plastic cap is in place at each valve.
In the Great Plains configuration, this would be:
Ammonia Exposure and Loss Hazards:
Understand the reason for any lifted or missing hydrostatic
relief valve caps. If a cap is out of place, that line section may
have been closed with liquid
NH
3
present, which later vented,
dislodging the cap. It is also possible that the valve disc has
deteriorated and is venting at normal operating pressures.
a. Set console MASTER switch OFF
b. Set BOOM 1 BOOM 2
a
and BOOM 3
switches
OFF.
c. Turn POWER switch ON.
If the valves were open, setting either MASTER
or all BOOM switches off closes the On/Off
Valve
.
d. Wait 10 seconds.
The Control Valve
goes to minimum due to
zero speed. It does not completely close.
e. Set POWER switch OFF.
a. If the applicator has a single-section boom, only switch
BOOM 1 needs to be operated.
•
at each cooler
•
at the outlet side of the breakaway coupler
Figure 37
Applicator NH
3
Shut-Off Valve
31528
Figure 38
Hydrostatic Relief Valve
31564