INSTALLATION
58
VOLTAGE CHANGE ON ZP CHAMBERS
Your chamber was configured prior to shipment for the particular voltage that was
specified at the time of order. If applicable, these instructions should be used to
change the input voltage from one configuration 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 1 to 3 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-configured for
the voltage and phase specified 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 specified 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
fitting 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 flow 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).
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.
recommended in the supply
line for water cooled units.
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