Siemens Energy & Automation, Inc.
4 Installation
4.1 Incoming Inspection
1. Unpack the controller from the carton and inspect for ship-
ping damage. Check that the items on the packing list agree
with the order.
File claims for loss or damage with the
freight carrier immediately.
2. If the controller will not be installed immediately, it should be
stored in a clean, dry area where the ambient temperature
is between 0
v
C and 70
v
C. Avoid storage environments with
corrosive atmospheres or high humidity.
Note: Installation must be performed by qualified personnel
as indicated on page 2 of this manual.
3. The carton and packing materials should be retained in case
there is a future need to return the controller to the factory
for service or repair. The carton and packing material are
especially fitted to protect the controller from shipping dam-
age.
If these materials are not used for shipping, claims for shipping
damage may be rejected by the freight carrier.
4.2 Mounting
1. Section 8 of the manual contains controller mounting dimen-
sions and data. Air flow through the unit is vertical, from bot-
tom to top.
2. Adequate cooling is essential for proper operation. Leave at
least 6 inches of clearance above and below the unit to allow
unimpeded convection or fan air flow.
Wire bending
allowance may require more than this recommended mini-
mum clearance.
3. When mounting the controller in an enclosure, the enclosure
must be properly sized or ventilated to provide cooling for
the continuous power dissipation in the thyristors, approxi-
mately 3 watts per ampere of continuous rating. The fol-
lowing vent areas are required for each inlet and each outlet
on customer furnished NEMA 1 enclosures, motor control
centers, etc.
Vent Area
Continuous Amps
HP at 460V
not req’d
up to 57A
40 HP
20 sq. in.
up to 131A
100 HP
40 sq. in.
up to 248A
200 HP
80 sq. in.
up to 361A
300 HP
120 sq. in.
up to 960A
800 HP
Locate front ventilation air inlet vent at least 3 inches below the
bottom edge of the controller. Locate the outlet air vent area at
least 6 inches above the controller top edge. Air filters impede
air circulation and require a fan at inlet and/or outlet.
Some NEMA 12 enclosures use bypass contactors or heat
exchange devices to maintain the integrity of the NEMA 12 rat-
ing. Establish a maintenance schedule for enclosures with heat
exchangers. Equipment cleaning frequency should be based on
the operating environment.
4.3 Installation Precautions
The following precautions are intended for use as guidelines for
proper installation of the controller. Because of the variety of
applications, all of these precautions may not pertain to your
system and they are not all-inclusive. In addition to the follow-
ing, refer to codes and standards applicable to your particular
system.
4.3.1 Motor Branch Circuit
The National Electrical Code (NEC) and local regulations govern
the installation of the SIKOSTART controller and the motor it will
control. Refer to NEC Article 430 for requirements and data
regarding 1) motor disconnecting means, 2) motor branch circuit
short circuit and ground fault protection, and 3) motor overload
regulations. Figure 8 shows the components generally required
to meet the various regulations. The overload relay indicated in
the figure is necessary but the standard SIKOSTART controller
is not furnished with an overload relay.
The SIKOSTART controller does not utilize electronic means to
protect itself from damage due to short circuits applied to the
motor terminals or from the motor terminals to ground. Suitable
branch circuit protection must be provided per NEC code.
Heavy equipment.
May cause injury or property damage.
To avoid personal injury or controller damage,
do not use the controller cover as a handle
when moving and/or positioning the unit.
Voltage or fire hazard.
Can cause death, serious injury, or
property damage.
To prevent electrical shock or burns, do not
leave foreign objects (wire clippings, metal
chips, etc.) either inside or on top of the con-
troller during installation procedures.
Fire hazard.
Can cause death, serious injury, or
property damage.
To prevent a fire, the controller, especially a
non-fan-cooled unit, must be mounted with
its fins in a vertical direction only. Side
ways mounting and improper ventilating
can result in fire.
Hazardous voltage.
Can cause death, serious injury, or
property damage.
To avoid electrical shock, this controller MUST
be wired with branch circuit protection since
the controller does not provide electrical isola-
tion to the motor when the controller is OFF.
9
