SCS C
ONDENSER
IOM
M
ANUAL
1
1.0
INTRODUCTION
1.1
General
The Remote Air Cooled Condenser is designed and
manufactured by STULZ. Recognized as a world leader, STULZ
provides precision cooling systems with the highest quality
craftsmanship using the finest materials available in the
industry. The unit will provide years of trouble free service if
installed and maintained in accordance with this manual.
Damage to the unit from improper installation, operation or
maintenance is not covered by the warranty.
This manual contains information for installation, operation,
maintenance, troubleshooting and repair. Study the
instructions contained in this manual. They must be followed to
avoid difficulties. Spare parts are available from STULZ to
insure continuous operation. Using substitute parts or
bypassing electrical or refrigeration components to continue
operation is not recommended and will void the warranty. Due to
technological advancements, components are subject to
change without notice.
STULZ Air Cooled Condensers are designed to reject heat from
refrigerant based cooling equipment. Any use beyond this is
deemed to be not intended. STULZ is not liable for any damage
resulting from improper use. The unit is designed to be installed
outdoors unless otherwise noted on the equipment nameplate.
1.2
Product Description
STULZ Remote Air Cooled Condensers are designed to be the
most efficient and reliable condensers in the industry. The unit
is an air-cooled, heat rejection condenser with a vertical air
discharge pattern.
The unit is self-contained in a light weight, corrosion resistant
aluminum cabinet designed for mounting to a horizontal
surface. The cabinet houses the condenser coil(s) and fan
assembly(s). The electrical controls are in an integrally mounted,
weather proof enclosure which is isolated from the rest of the
equipment.
There are many cabinet sizes based on the capacity of the unit.
Refer to the installation drawing supplied with your unit for the
layout and dimensions of your cabinet.
-SCS condensers are highly efficient heat rejection systems.
Enhanced performance -SCS-MC condensers are also
available. -SCS-MC condensers are equipped with micro-
channel coils which offer greater refrigerant-to-air heat
transfer. The total heat rejection in BTU/hr will depend on the
unit size. Refer to the unit nameplate to identify the model
number of your unit. The system will consist of
a single refrigeration circuit or dual circuit coil. The coil is a
closed-loop refrigerant condensing heat exchanger in
which refrigerant is continuously circulated by the pressure
differential created by a compressor.
The compressor increases refrigerant pressure to a level
sufficiently high for it to be cooled and condensed into
liquid by the effect of ambient air being drawn over the
condenser coil. STULZ condensers are designed to
operate with either R407C or R410A refrigerant. Refer to
the unit nameplate to identify the type of refrigerant to be
used in your unit.
Outdoor air cooled condensers use fan cycling for low
ambient head pressure control down to 0 °F (OHS only).
Variable fan speed control is used for operation in low
ambient temperatures down to -20 °F. Flooded head
pressure control is used with fan cycling for low ambient
temperatures down to -30°F.
Operation of the condenser is independent, controlled by the
refrigerant pressure. It can be wired in the field for the system
controller (provided with the indoor evaporator section) to
enable condenser operation.
1.2.1
Capabilities and Features
•
All aluminum cabinet construction
•
Mounting legs
•
Direct driven axial fan(s) equipped with
external rotor motors
•
Unit mounted, weather resistant control enclosure
with lockable service disconnect switch
1.2.1.1 Safety Features
The remote air-cooled condenser is provided with a
factory mounted service disconnect switch. The service
disconnect switch electrically isolates the unit during routine
maintenance. The handle of the switch may be locked in the
“Off” position to prevent unauthorized operation. Finger
guard grilles are provided on each fan to protect the operator
from injury and to keep large tools or other objects from
falling into the fan.
1.2.2 Application Ranges
STULZ remote air cooled condensers are designed for
operation within the following ranges.
Outdoor Temperature Range
Fixed Fan Cycling
Control (OHS only)
0 ºF or higher
Variable Fan Speed
Control
-20 ºF or higher
Flooded Head
Pressure Control
-30 ºF or higher
