CSZ ZP 16, Installation, Operation & Maintenance Manual, Page: 21 / 88

GENERAL DESCRIPTION
Page 2-5
HUMIDITY
The ZPH-Series chambers provide the same temperature ranges for heating and
cooling as the ZP-Series, but add the ability to control humidity within the range of
10% to 98% relative humidity as limited by a 185ºF (85ºC) maximum dry bulb
temperature and a 45ºF (7ºC) dewpoint. The chambers have the ability to control
humidity as low as 5% when the Dry Air Purge / Low RH option is utilized. Standard
systems use a steam generation humidity system. Refer to Figure 4. for more
information on achievable humidity points.
HUMIDITY COMPONENTS (Steam Generator System)
The water supply connection for humidity is located at the rear of the unit. The
following is a description and function of the major components .
A. (OPTIONAL) Water Valve and Rack Assembly (Located at the rear of unit)
1. The valve is used to temporarily turn off the water supply in order to
change the demineralizer fi lter without interrupting chamber operation.
2. The rack holds the demineralizer fi lter.
B. (OPTIONAL) Demineralizer Filter (Located at rear of unit)
1. The fi lter removes most common impurities from tap or soft water.
2. The outer casing of the fi lter is transparent and the crystals are visible. A new
cartridge is violet or dark blue when water fl ows through it. A spent cartridge will
turn brown, orange, yellow or white. The cartridge should be changed before it
completely changes color. A reference mark is provided on the
fi lter to indicate
when it should be changed. Spare cartridges are available through the CSZ
Service Department. Refer to the Humidity Maintenance Section for instructions
on how to change the
fi lter.
C. Water Fill Solenoid
1. This is a normally closed solenoid valve and is energized (opened) only when
the
fl oat switch in the steam generator drops below the reset level. The valve
remains energized until the water is at the right level.
D. Steam Generator System
1. The steam generator provides humidity in the form of steam. The steam
generator has a multi-level fl oat switch which controls the water level. The
heater boils the water to generate steam. The steam is injected into the
chamber.
2. A high temperature safety thermostat is located on the side of the steam
generator. It will remove heater power if an over-temperature situation is
reached.
E. (OPTIONAL) Water pressure regulator
1. Reduces incoming water pressure to 10 PSI (69 kPa) for an atomizer and 25
PSI (172 kPa) for a boiler.
Water speci fi cation 0.05 to
2 Mega OHMS in addition
to <2mg/L of free chlorine.
CAUTION
!
Maximum water inlet
pressure is 10 PSI (69kPa)
for an atomizer and 25
PSI (172 kPa) for a boiler.
Exceeding this pressure
may cause catastrophic
failure of the
fi lter housing.
For optimal use of the
a t o m i z e r a n d b o i l e r
systems, inlet water
pressure should not fall
below 10 PSI (69 kPa) for
both boilers and atomizers.
WARNING
!
Failure to maintain cartridge
may result in chloride
corrosion of stainless steel
interior surfaces which is
not covered under warranty.
CAUTION
!