Herrmidicool
I n s t a l l a t i o n , O p e r a t i o n & M a i n t e n a n c e M a n u a l
8
www.trioniaq.com
XIV. NOZZLE TROUBLESHOOTING
A. Heavy spray pattern (droplets too large)
1. All heads – This is caused by incorrect air and water
pressure settings. Review settings and adjust as required.
Never allow air pressure to exceed the water pressure.
2. Individual Heads – These heads are not getting enough
air for one of the following reasons:
a. Foreign matter may be clogging the screen (AH-21) in
the air strainer union of the head. Clean or replace it.
b. One or more of the heads may have been improperly
adjusted or the individual shut-off valve may be throttled.
No valves should ever be throttled. Readjust if necessary.
c. Water nozzle (AH-942) orifice may have been enlarged
due to bent cleaning needle. Replace parts as required.
d. Atomizer nozzle (AH-941) orifice may have been
enlarged due to improper cleaning or dirty air. Replace
part as required. Standard air orifice sizes for the various
heads are as follows.
6 lbs/hr
0.95 mm
8 lbs/hr
1.10 mm
10 lbs/hr
1.15 mm
12 lbs/hr
1.35 mm
15 lbs/hr
1.45 mm
B. Spray pattern too light at full capacity
1. All heads – This is caused by incorrect air and water
pressure settings. Review settings and adjust as required.
Never allow air pressure to exceed the water pressure.
2. Individual heads – These heads are not getting enough
water for one of the following reasons:
a. One or more of the heads may have been improperly
adjusted or the individual shut-off valve may be throttled.
No valves should ever be throttled.
b. Foreign matter may be restricting water flow in the
water nozzle (AH-942). Turn off the air and water valves
at the head.
Remove the atomizer nozzle and water nozzle. Blow
water nozzle with air. Do not use wire or other hard
object that will score the inside of the nozzle.
C. Sputtering heads – air pressure at the atomizing heads
exceeds water pressure.
1. Adjust air and water pressures to correct operating
pressures.
2. Normally open drain solenoid on water control section
may have a malfunction allowing water to leak into drain
line during operation. Solenoid valve seat may have
foreign matter under the seat causing it to leak. Solenoid
may have defective seat.
D. Inoperative heads (all heads)
1. The atomizing heads may be shutdown because the
system controls and setpoints are satisfied.
2. If the desired RH level has not been achieved, check
calibration of the controls and adjust as required.
3. Air and water supply valves are not open.
4. No supply air pressure. If supply valves are open and
the gauges indicate no air pressure, check compressed
air source.
5. No power to the air and water solenoid valves. Check
controls and control cabinet fuses.
Individual heads
6. Be sure air and water valves to the atomizing heads
are open.
7. Possible defective parts inside atomizing head. Shut-off
air and water valves to the head and remove head from the
system. Disassemble and examine internal parts. Repair
and reassemble as required. Rebuilding kits are available
from your local TRION/HERRMIDIFIER representative.
Perform a complete restart and readjustment of the
atomizing head upon reassembly and repair.
E. Air Without Water – Be sure water valve to control
section is open. Check modulating water valve, water
solenoid and drain solenoid on water control section.
