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RVZC30 (and BB/T/TBB/WA), RVZP30 (and BB/T/TBB/WA), RVC24

21

0407

ELECTRICAL

! CAUTION !

DISCONNECT POWER TO THE CASE

BEFORE SERVICING ELECTRICAL COMPONENTS TO

AVOID PERSONAL INJURY AND DAMAGE TO THE UNIT.

Figure 21 for 30” door cases and Figure 22 for 24” door
cases shows the typical wiring diagram for a freezer equipped
with electric defrost.  Figure 23 shows the typical wiring dia-
gram for a freezer equipped with hot gas defrost.  Each case
is provided with a wiring diagram located in the electric box
that shows the exact wiring of the case.

There are many control options available for multiple case
defrost systems. Wiring diagrams and instructions can be
obtained by contacting Zero Zone’s Service Department.

External wiring should be sized according to the amperage
rating stamped on the serial plate. The serial plate is located
on the ceiling inside the left-hand door. Typical electrical val-
ues are shown on specification sheets for each of these cases
in the bag attached to the case or are available at
www.Zero-Zone.com. All internal wiring has been done at the
factory. Cases with standard wiring have their control wires
terminated in the electrical compartment located behind the
kick rail at the right end of the case. A terminal block has been
used to simplify field connections.  An electrical box is mounted
on the top of the unit for cases equipped with the optional top
mount electrical connections.

All wiring must comply with the National Electrical Code and
all local codes. After installation of the equipment, correct op-
eration of the electrical circuits and controls and defrost op-
eration and termination  should be verified.  All operating volt-
ages and amperages should be measured and recorded.

OPTIONAL ELECTRICAL WIRING

Single Point Connection

The “single point” connection system is designed to reduce
the time required to install and wire one display case with one
condensing unit.  Figure 24 is a typical diagram for this sys-
tem.

All of the display case controls, including the disconnect switch,
time clock, temperature control, and defrost temperature con-
trol  are installed behind the kick plate and prewired.   The
liquid line solenoid valve is installed in the liquid line and wired.

The power to operate the display case is connected at the
case disconnect switch.  The power to operate condensing
unit is connected in the condensing unit control panel.  There
are  no interconnecting wires between the condensing unit
and display case.

The controls operate the system as a pump down defrost.
When the display case begins defrost the liquid line solenoid
valve, fans and anti-sweat heaters are de-energized.  The
defrost heaters are energized.  The compressor continues to

run and pumps down the coil.  The compressor cycles off on
its low-pressure control.  If there is any residual liquid left in
the coil, the suction line pressure will rise and the compressor
may turn on and pump down the coil.

The liquid line solenoid is energized at the end of the defrost
cycle and the defrost heaters are de-energized. The suction
line pressure rises and the compressor starts.  When the evapo-
rator reaches operating temperature the delay thermostat (klix-
ons) will close energizing the fans and anti-condensate door
heaters.

Master Satellite Connection

The “master satellite”  connection system allows one condens-
ing unit to be connected to multiple cases.  Figure 25 shows a
typical diagram for this system.

All of the display case controls including the disconnect switch,
time clock, temperature control, and defrost temperature con-
trol are installed behind the kick plate and prewired.  The liquid
line solenoid is prewired but is not installed in the liquid line.

The power to operate each display case is connected at each
cases’ disconnect switch.  The power to operate condensing
unit is connected at the condensing unit.  There are no inter-
connecting wires between the condensing unit and display case.
There are interconnecting wires that need to be connected
between the cases.  The liquid line solenoid valve needs to be
installed in the common liquid line before the liquid is distrib-
uted to the cases.

The controls operate the system as a pump down defrost.  When
the display case begins defrost, the liquid line solenoid valve,
fans and anti-sweat heaters are de-energized.  The defrost
heaters are energized.  The compressor continues to run and
pumps down the coil.

The master case contains the time clock.  Interconnecting case
wiring allows the master case to control the satellite cases.
When defrost is initiated in the master case, it sends an elec-
trical signal to each case to energize the defrost relay and
initiate a defrost in all of the satellite cases.  A second set of
interconnecting wires are connected in series between each
of the cases.   Each case defrost heater is de-energized when
the coil reaches the defrost termination temperature.  An addi-
tional signal is relayed to the next case indicating that the ter-
mination temperature has been reached.  When all of the cases
have reached termination temperature, the defrost termination
circuit is complete and the defrost is terminated.

The liquid line solenoid is energized at the end of the defrost
cycle and the defrost heaters are de-energized. The suction
line pressure rises and the compressor starts.  When the evapo-
rator reaches operating temperature, the delay thermostat (klix-
ons) will close, energizing the fans and anti-sweat door heat-
ers.

Содержание RVZC30

Страница 1: ......

Страница 2: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 2 0407...

Страница 3: ...Refrigerant Piping 17 Figure 16 Penetration sealing 17 Figure 17A Refrigeration line sizing Frozen Foods 18 Figure 17B Refrigeration line sizing Ice Cream 19 Figure 18 45 elbow suction line 20 Tempera...

Страница 4: ...AT TIME OF DELIVERY AND ALL CLAIMS FOR DAMAGES MUST BE FILED WITH THE TRANSPORTATION COMPANY NOT WITH ZERO ZONE The carrier will supply necessary report and claim forms PACKAGING Each case in a line...

Страница 5: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 5 0407 Figure 1 Case label information...

Страница 6: ...tional hat channels to raise the case height place them under each pair of bases The 3 and 4 door hat channels will be angled slightly to support the front and rear bases Figures 3 5 6 Place the requi...

Страница 7: ...VZP30 and BB T TBB WA RVC24 7 0407 Figure 4 Shims under bases and case Figure 3 Typical hat channel locations Hat section Shim Base Shim Base Both corners of the base must be supported by shims to pre...

Страница 8: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 8 0407 Figure 5A All base locations 1 Door Case Wrap Around Case WA Back to Back Wrap Around Case WB...

Страница 9: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 9 0407 Figure 5B All base locations...

Страница 10: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 10 0407 Figure 5C All base locations...

Страница 11: ...floor as high as necessary for transport The fork truck should be driven slowly avoiding any abrupt motions or bumps The following fork lift dimensions must be maintained to avoid damaging the case w...

Страница 12: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 12 0407 Figure 8 Expandable base Figure 6 Removing wood planks Figure 7 Wood block inside base Spacers...

Страница 13: ...ases to be joined Figure 10 T Strips DO NOT APPLY EXCESS AMOUNTS OF BUTYL SEALANT THAT WOULD CAUSE IT TO SQUEEZE ONTO END FRAME METAL AREAS Caulk sealant used to join cases and complete the sealing re...

Страница 14: ...e and a drain trap to the tee Plug the open end of the tee using the clean out plug supplied with Figure 11 Required sealing for NSF approved installations the drain trap kit The drain line must be pi...

Страница 15: ...nt kick plate Installing Bumper Figure 14 The front kick plate and bumper attaches using 1 screws attached to brackets located on the front of the case The kick plate can be adjusted up and down to fi...

Страница 16: ...ers on a 2 door 3 spacers on a 3 door 1 To ease installation hook the bumper to the case and position the kick plate Then pull the bottom edge of the bumper forward hold the spacer in place and then i...

Страница 17: ...ired Figure 18 A piping chase in front of the fan shroud allows the refrigerant lines to be run through the right or left end frame Piping should not be placed near the electric defrost heaters The de...

Страница 18: ...8 2 820 5 280 5 8 2 250 4 220 5 8 1 920 3 600 5 8 7 710 12 800 7 8 5 290 8 780 7 8 4 230 7 030 7 8 3 610 6 000 7 8 12 810 20 300 7 8 8 790 14 000 7 8 7 040 11 200 7 8 6 010 9 530 7 8 20 310 41 000 1...

Страница 19: ...5 8 1 850 3 450 5 8 1 570 2 950 5 8 6 310 10 500 7 8 4 330 7 180 7 8 3 460 5 750 7 8 2 960 4 910 7 8 10 510 16 600 7 8 7 190 11 400 7 8 5 760 9 120 7 8 4 920 7 790 7 8 16 610 33 600 1 1 8 11 410 23 1...

Страница 20: ...ling or delayed cycling Figure 18 45 elbow suction line Temperature Control Adjustment When factory installed the temperature control is located to ward the right end of the case behind the black kick...

Страница 21: ...rs are de energized The defrost heaters are energized The compressor continues to run and pumps down the coil The compressor cycles off on its low pressure control If there is any residual liquid left...

Страница 22: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 22 0407 Figure 21 Electric defrost 30 wiring...

Страница 23: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 23 0407 Figure 22 Electric defrost 24 wiring...

Страница 24: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 24 0407 Figure 23 Hot gas wiring...

Страница 25: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 25 0407 Figure 24 Single point wiring...

Страница 26: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 26 0407 Figure 25 Master satellite wiring...

Страница 27: ...hermostat or probe attached to the dump line At ASHRAE test conditions termination ranges from 12 22 minutes If the cases are so equipped the defrost termination is 65 F Zero Zone provides a defrost t...

Страница 28: ...into the serpentine coil attached to the floor of the case and then into the evaporator Condensed liq uid leaves the evaporator through the side port distributor through a check valve into the liquid...

Страница 29: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 29 0407 Figure 27 24 Electric Figure 26 30 Electric...

Страница 30: ...RVZC30 and BB T TBB WA RVZP30 and BB T TBB WA RVC24 30 0407 Figure 28 Coil 30 Hot gas Figure 29 Coil 24 Hot gas...

Страница 31: ...ght switch off during the initial case temperature pull down to prevent the case lights from cycling off and on Always turn the lights off when replacing lamps Case Thermometer The cases are shipped w...

Страница 32: ...g Heaters are installed in the reverse order of how they were removed Evaporator Fans Air is circulated throughout the case with 115 volt low tempera ture fan motors These motors must be operating at...

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