Spencer GasCube Natural Gas Booster Skid Package - Manual (Page 5)

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The Spencer Turbine Company u 600 Day Hill Road, Windsor, CT USA 06095 u TEL 800-232-4321 u 860-688-8361 u www.spencerturbine.com
tions must be done by a qualified electrician in accordance
with the National Electrical Code and local codes.
CAUTION: The electrical service at the installation site
must supply the voltage stamped on the gas booster
nameplate. Be sure to operate the unit at the correct
voltage. This will help prevent damage to GasCube
components and possible voiding of the warranty.
In making electrical connections, follow the provided wir-
ing instructions, which are located inside the enclosure
door of the control panel. Be sure to follow the wiring
diagram that coincides with the incoming power voltage
and phase for your installation.
Wire should be of ample capacity to ensure that proper
voltage is maintained at the motor terminals while start-
ing and running. It is important to use proper starting
equipment. The GasCube package starter has thermal
overload protection as well as true low-voltage protection.
Your GasCube package is shipped with a Sequence
of Operations manual specific to your GasCube pack-
age control panel. The manual can be located inside the
enclosure door of the control panel.
6. Motor
Rotation
The GasCube package must be wired correctly to rotate
the gas booster in the right direction. To check rotation,
turn off the gas. Then, unthread the plug on the 1” NPT
half-coupling rotation inspection port at the top of the
hermetic gas booster casing. You can then verify that the
rotation of the motor shaft is the same as what is shown
on the Rotation Arrow Plate on the gas booster casing.
Be sure to reseal the plug with UL Listed thread sealant,
and leaktest prior to putting into operation.
CAUTION: Be sure that the plug in the rotation inspec-
tion port is properly sealed after you replace it.
Ball Bearings
The motor ball bearings in the gas booster have been
designed specifically for the function they must perform.
Impeller loads, both radial and thrust, are carried by the
motor bearings.
Motors
Spencer Gas Booster Series GL incorporate an explosion
proof motor suitable for Class 1, Group D environments.
The motors are also equipped with thermal overload
protection (thermostats).
Lubrication
The motor bearings are factory lubricated and sealed.
Additional lubrication is not required. The gas booster must
be disassembled if both front and back motor bearings
are to be replaced. Consult factory for repair procedure.
To maintain the gas booster UL Listing, be sure to have
the repair performed by a Spencer-authorized UL repair
are unobstructed before connecting piping to blower.
1. Piping
The Spencer GasCube package contains at its heart
a Gas Booster Series GL that is UL Listed as suitable
for installation in accordance with the provisions of the
National Electric Code, NFPA No. 70, and the National
Fuel Gas Code, NFPA No. 54, for natural gas only.
All piping connected to the GasCube package should be
sized to minimize friction loss. All system joints must be
gastight.
All piping must be properly aligned and supported to
avoid stress on the GasCube components and anchored
adequately to prevent movement away from the GasCube
package caused by gas pressure. Flexible connectors
must be used to connect piping to the gas booster.
Caution: If the piping system is to be leak tested using
high-pressure air/gas, be sure to either bypass or
disconnect the GasCube gas booster. High-pressure
gas will seriously damage the components. The
GasCube package test pressure must not exceed
5 psig.
Caution: The GasCube package is factory leaktested
and is gastight at time of shipment. Shipping and
installation may cause looseness at the skid piping
joints. The GasCube package should be leaktested
at 3 psig with the gauges and low pressure switch
isolated using the gauge and switch isolation valves
mounted on the unit.
2. Flexible Connectors
Caution: Connected piping should not be hard piped
to the GasCube package. Expansion joints are supplied
on both the inlet and outlet to create a flexible isolating
gap between the GasCube package and piping.
3. Plug Valve
The plug valves are used to isolate the GasCube gas
booster from the gas line if maintenance is necessary.
The plug valves may also be used as a throttling valve to
regulate volume and/or pressure if piping resistance is not
sufficient in preventing overloading of the motor.
4. Inlet Check Valve (Shipped Loose)
Caution: The supplied check valve must be installed
in the gas line prior to the GasCube package inlet to
prevent reverse flow.
The check valve is shipped loose and must be installed
horizontally prior to the inlet of the GasCube package. If
not installed horizontally, it will not function properly.
5. Electrical Installation
NOTE: All wiring and electrical adjustments or installa-