CSZ ZP 16, Installation, Operation & Maintenance Manual, Page: 25 / 88

GENERAL DESCRIPTION
Page 2-9
HUMIDITY COMPONENTS (CONTINUED)
The chamber area contains the remaining components necessary to generate and maintain humidity levels
within the work space. The following is a description of these components (see Figures 3 to 5).
A. Solid State Humidity Sensor
DO NOT RELOCATE . It has been located at the factory for maximum performance.
This unit utilizes a solid state relative humidity sensor which takes the place of the traditional wet bulb
and dry bulb sensors. The solid state sensor is a highly accurate quick responding direct RH
measuring device. It feeds an electronic signal to the controller that in turn controls and displays direct
relative humidity.
B. Atomizing Nozzle (Optional)
Water fl ows from the control solenoid at a very slow rate. Air is pumped into this nozzle and picks up
the water. The chamber is humidi fi ed by the air/water mixture.
C. Humidity Wet Coil
This coil is cooled by the R-404A (System 1) system and functions as a dehumidi fi cation coil.
Dehumidi fi cation of the chamber air is accomplished by condensing water from the chamber air onto
the refrigerated surface.
D. Wet Coil Pan
The wet coil pan is used to collect moisture from the wet coil and dispense it through the chamber drain.
E. Recirculating Water
The Recirculating Water Reservoir Option is a fully integrated accessory that requires only minor
installation. Just fi ll the reservoir with water to the fi ll line, connect a drain line to the plastic
ball valve located at the bottom rear of the unit and the system is ready to operate.
Typical System Operation:
 
A water pump (located under the reservoir) turns on when the humidity
function is turned on and pumps water from the reservoir to the boiler

 
The water vapor condenses into a liquid and runs down the chamber drain,
back to the reservoir

 
This cycle is repeated over and over

 
The fl oat switch (located on top of the reservoir) turns the pump off when the water level in the
`reservoir is too low and needs to be replenished, preventing damage to the pump
Maintenance:
 
Drain and clean the reservoir every 2 months or sooner as required by usage and water
conditions