Winco PSS25000/A - Manual (Page 6)

PAGE 4 60706-171 5076-10
INSTALLATION
General Information
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***** WARNING ****
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Before proceeding with the installation, be sure the
operation selector switch is in the stop position.
These engine/generator sets are designed to be
mounted on a concrete pad outdoors only. The transfer
switch is mounted next to your electrical entrance or
distribution panel inside the building. Consult a quali-
fied, licensed electrician or contractor to install and wire
the transfer switch. The installation must comply with all
national, state and local codes.
***** CAUTION ****
EQUIPMENT DAMAGE - The PSS25000 must be
mounted on a full length solid concrete pad to prevent air
from exiting under the unit. Allowing air to exit under the
unit may cause the unit to overheat from lack of proper
air flow.
Before beginning the installation process recheck the
rating of the generator set and its transfer switch rating.
Be certain they can handle the intended load and are
compatible with the entrance voltage, phase and current
ratings. Plans for installation should be prepared with
proper attention to mechanical and electrical engineering
detail to assure a satisfactory system installation. The
information in this manual is offered only as a guide to
finalizing your installation plans. For full service switching
the A.T.S. must have a fusible disconnect (circuit breaker)
installed before the switch to protect transfer switch.
ENGINE GENERATOR SET MOUNTING
The unit’s main frame should be bolted solid to a four to
six inch thick cement pad. The engine-generator is
mounted on a sub-frame which is isolated with special
shock mounts on the main frame. This allows the
engine-generator to vibrate without affecting the control
panel on the main frame.
Do not install any shock mounts between the base
frame and the concrete pad. Engine vibration will be
transmitted to the control panel causing erroneous start/
stop cycles and premature control failure.
The unit should be mounted to allow for ample working
room around it. Particular attention should be paid to the
direction of the hot air discharge and exhaust discharge.
Unit location should be such that these discharges are not
allowed to be drawn back in through an open window or
door. A general rule to follow is five (5) feet of clearance
on all sides. (Code NFPA 37requires five feet from any
combustible surface.)
FUEL INSTALLATION
NOTE: All PSS25000 units are tested on Natural Gas
and shipped configured for Natural Gas. See page 6 for
conversion to LP
The fuel supply should be as close as possible to the
engine. This will reduce the installation cost of fuel runs.
The information in this manual is offered to assist you in
providing the proper fuel for your engine. However, this
information is only provided to inform you of the engine’s
requirements and assist in making you aware of the
decisions you must make. In no case should the
instructions or information provided be interpreted to
conflict with any local, state or national codes. If in doubt,
always consult your local fire marshal or gas supplier.
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***** WARNING ****
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FIRE HAZARD - All fuel runs should be installed by a
licensed fuel supplier.
Connect the fuel supply to the inlet of the fuel solenoid
(see table for recommended line size). For all vapor fuel
systems the delivery pressure of the fuel to the fuel
solenoid on the unit must be four to six ounces psi (per
square inch) or 7 to 11 inches W.C. (Water column).
Units equipped with liquid withdrawal kits must be
connected to the liquid withdraw valve on the tank. Full
tank pressure must be delivered to the 3/8” fuel fitting on
the fuel lock strainer at the generator. These fuel
pressures are critical, failure to provide the proper fuel
pressure can cause many problems ranging from a unit
that will not start to causing damage to the fuel system.
INSTALLING THE FUEL LINE
** NOTICE **
The engine generator sets are properly adjusted before
they leave the factory. A tag is attached to the unit that
specifies the fuel, natural gas (NG) or propane vapor (LP)
that the unit was set up and tested on. A slight adjust-
ment may be necessary on NG depending on local BTU
content. This adjustment will be discussed later.
Line Size
Unit location will determine the size of fuel line that is
required to supply the engine with a constant fuel
pressure and volume. Refer to the tables below for fuel
line size, fuel consumption and recommended tank size.
For distances of 50 feet and over, a two regulator fuel
system is recommended. This is accomplished by
installing a primary regulator at the tank which will reduce
the tank pressure down to 10 to 15 lbs. A secondary
regulator is installed to further reduce the fuel pressure
to the required four (4) to six (6) oz. operating pressure.
This secondary regulator must be at least 10 feet from the
engine generator set, any closer installation will require a
larger line be installed to provide a fuel reservoir. This is