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© STULZ USA – All rights reserved QEWR002G
CYBERROW DX ENGINEERING MANUAL
PRODUCT
GUIDE SPE
CIFIC
A
TIONS
round system operation down to -30°F DB minimum ambient air
temperature. Liquid refrigerant receivers, with receiver liquid-
level sight glass and head pressure regulator valves (for fl ooded
condenser operation) shall be included, but not factory installed.
WATER/GLYCOL COOLED HEAT
REJECTION
Stainless Steel Brazed-Plated (W/G)
The evaporator refrigerant circuit shall be provided with a factory
installed single pass, counterfl ow confi gured, brazed plate heat
exchanger, with integral subcooler. It shall be constructed of type
316 stainless steel; designed and tested for a 650 psig. w.w.p.
2-Way, 600 psig Regulating Valve (W/G)
(Standard)
The refrigerant circuit head pressure shall be controlled by a
factory installed 2-way water/glycol regulating valve rated for 400
psig. w.w.p. The 2-way condenser water modulating valve shall
automatically meter the fl ow of water to the condenser. It shall do so,
in response to a proportional signal (0-10VDC) provided to the valve
by the microprocessor controller.
3-Way, 600 psig Regulating Valve (W/G)
(Optional)
The refrigerant circuit head pressure shall be controlled by a
factory installed 3-way water/glycol regulating valve rated for 400
psig w.w.p. The 3-way condenser water modulating valve shall
automatically meter the fl ow of water/glycol to the condenser. It
shall do so, in response to a proportional signal (0-10VDC) provided
to the valve by the microprocessor controller.
ELECTRICAL SYSTEM
The electrical system shall conform to National Electrical Code
(NEC) requirements. In accordance with NEC Class II requirements,
the control circuit shall be 24 volts AC wire, and shall not be smaller
than 18 AWG. All wiring shall be neatly wrapped on run in conduit, or
cable trays, and routed in bundles. Each wire shall end with a service
loop and be securely fastened by an approved method. Each wire in
the unit shall be numbered for ease of service tracing.
All electrically actuated components shall be easily accessible from
the front of the unit without reaching over exposed high voltage
components or rotating parts. Each high voltage circuit shall be
individually protected by circuit breakers, or manual motor starters,
on all three phases. The blower motor shall have thermal and short
circuit protection. Line voltage and 24 volt control circuit
wiring shall be routed in separate bundles. The electric
box shall include all the contactors, starters, fuses, circuit
breakers, terminal boards, and transformers required for
operation of the CyberRow unit. It shall also allow for full
service via front and rear access panels.
REMOTE STOP/START CONTACTS
Included in the system’s electrical control circuit shall be
a 2-pin terminal connection for remote stop/start of the
CyberRow air conditioner by remote source.
MAIN POWER SERVICE SWITCH
The CyberRow unit shall be provided with a unit mounted
main power service switch.
E²
SERIES CONTROLLER
GENERAL
The advanced microprocessor based
E²
Series controller
shall be equipped with fl exible software capable of meeting
the specifi c needs of the application. The setpoints shall be
default and their ranges shall be easily viewed and adjusted
from the user interface display. The program and operating
parameters shall be permanently stored on a non-volatile
system in the event of power failure. The controller shall be
designed to manage temperature to a user defi ned setpoint
via control output signals to the CyberRow unit.
The controller shall receive inputs for measurable control
conditions (temperature, relative humidity, and dew point) via
return air or remote mounted supply air sensors. The internal
logic will then determine if the conditions require cooling.
Control setpoints shall be established to maintain design
conditions of the installation. The controller will respond
accordingly to changes in these conditions and control the
output/demand for the appropriate mode of operation until
user defi ned conditions are achieved.
FIELD CONFIGURABLE
The program for the
E²
Series controller shall be fi eld
confi
gurable, allowing the operator the capability of
selecting control setpoints specifi c to the application.
Operator interface for the
E²
controller is provided via a door
mounted user interface display panel. The display panel shall
have a backlit LCD graphical display and function keys giving
the user complete control and monitoring capability of the
precision cooling system. The menu driven interface shall