Herrmidifier Herrmidicool - Manual (Page 11)

Herrmidicool IOS Manual
I n s t a l l a t i o n , O p e r a t i o n & S e r v i c e M a n u a l
11 www.herrmidifier-hvac.com
System Fault Conditions
(See Troubleshooting Section for corrective action)
Fault Operation
Status
Comments
Air Flow / High Limit System
Shutdown,
Automatic
Reset (1)
Insufficient airflow/
high limit setting
exceeded
Hi Humidity Alarm (2)(3) Continued
Operation
Alarm threshold
achieved
Low Humidity Alarm (2)(3) Continued
Operation
Alarm threshold
achieved
Humidity Sensor Failed (2) Continued
Operation
unless both fail
Humidity less than
4% or greater than
100%
1. Automatic reset will resume normal operation once the
circuit is closed.
2. Proportional + Integral Control Only
3. Indicating Fault
EXTENDED SHUTDOWN
After an extended shutdown, air and water lines should be
blown out prior to resuming normal operation
Atomizing Head Operation
The Herrmidifier atomizing heads operate with the water
pressure higher than the air pressure. As air enters the
atomizing head, it flows in a centrifugal motion inside the air
nozzle and around the outside of the water nozzle. As the
water enters the atomizing head, it creates pressure against
the diaphragm and compresses the spring located on the
opposite side of the diaphragm. The motion of the diaphragm
pulls the water valve disk away from the bottom of the water
nozzle allowing water to flow through the water nozzle. As
the water exits the water nozzle, it become atomized by the
compresses air inside the air nozzle and exits the atomizing
head as a fine spray.
Pressure Settings
IMPORTANT: The air and water pressures to the atomizing
head should only be adjusted when the humidifier is at full
output. In other words, when the modulating water valve is
100% open the controls are calling for maximum capacity.
Do not attempt to adjust the air and water pressure settings
at any other time. The instructions below assume that the
atomizing heads are installed at the same elevation as the
water control section. Adjustment from this standard must be
made to compensate for any elevation differences between
the water control section and the atomizing head manifold.
1. Set the air pressure at 30 psig.
2. Set the water pressure at 33-38 psig according to the
atomizing head capacity as listed below:
a. 6 lb/hr. 35 psig
b. 8 lb/hr. 38 psig
c. 10 lb/hr. 33 psig
d. 12 lb/hr. 35 psig
e. 15 lb/hr. 37 psig
The water pressure settings listed above will allow the
atomizing heads to perform at their rated capacity (lb/hr.).
It may be desired to deviate slightly (1-2 psig) from the
standard settings in order to enhance performance. Slightly
lower water pressures will result in a finer atomized spray
(smaller droplet size). Be aware that any adjustments such
as this will also reduce the rated capacity of the heads. Use
caution accordingly.