CSZ ZP 16, Installation, Operation & Maintenance Manual, Page: 44 / 88

INSTALLATION
Page 3-4
VOLTAGE CHANGE ON ZP CHAMBERS
Your chamber was con fi gured prior to shipment for the particular voltage that
was speci fi ed at the time of order. If applicable, these instructions should be
used to change the input voltage from one con fi guration to another.
ZP-Series chambers with 1HP-2HP refrigeration systems can be set to run off
208V or 230V, 60 Hz., and 1 phase or 3 phase power. The change between
one to three phase supply requires jumper changes on TB-1(main power
terminal block) on the electrical sub-panel. The voltage change requires a
jumper to be changed for the control transformer’s primary voltage tap. The
chambers come pre-con fi gured for the voltage and phase speci fi ed upon
order.
1HP - 2HP 208-230V, 60 Hz Only
To switch from single phase to three phase power. Remove the jumpers
be-tween terminals 1L1, 1L3 and 1L2, 1L4 on TB-1. Place one jumper
between terminals 1L3, 1L2. Connect main power leads as shown in Figure 1
for 3 phase connection.
To switch from three phase to single phase power. Remove the jumper
between terminals 1L3, 1L2 on TB-1. Place one jumper between terminals
1L1, 1L3 and 1L2, 1L4. Connect main power leads as shown in Figure 2 and
for single connection.
REFRIGERATION SYSTEM PRESSURES
Check the system pressures using the refrigeration system pressure gauges.
If the R-508B (System 2) static pressure is more than 30 PSI (2 bar(g))
lower than that speci
fi ed on the data plate, contact the CSZ Service
Department. DO NOT START. If the R-404A (System 1 or Tundra)
pressure is less than 100 PSI (6.9 bar(g)), contact the CSZ Service
Department.
DO NOT START .
WATER COOLED UNITS (OPTIONAL)
If water cooled, provide and connect water supply and return lines to the inlet
and outlet for the condenser. The line size should be equal to or larger than
the inlet
fi tting provided on the chamber (See Water Usage Table).
Note: Water cooled systems can require up to a 40 PSI (275 kPa) differential
pressure (supply pressure minus return pressure) on the water system
(See PSID on chart). The water temperature provided to the unit will
determine the
fl ow rate. Some water cooled units have strainers at the
inlet connection. These should be cleaned periodically. On systems
using a closed loop cooling water system with a pressurized return,
supply pressure must be at least 40 PSI (275 kPa) (refer to chart)
greater than return pressure. Maximum water pressure = 60 PSI (515
kPa).
D o n o t m a k e f i n a l
connection to water inlet
fitting on the chamber
until any newly installed
line has been flushed
thoroughly to remove any
pipe compound, metal
chips, or foreign matter.
A strainer (20 mesh) is
recommended in the
supply line for water
cooled units.
NOTE
CAUTION
!