Maxi Comet Executive Exec-56-G, Instruction Manual

Page: 28 / 244

Installation Comet Executive Gas
2-12
Single Phase Machines-115V
1. Bring the supply lines to the electrical
panel. Use two wires for the power supply
and a green third wire for ground.
2. Extend the lines following local codes and
properly secure the conduit or greenfield.
3. Connect one power wire to terminal L1
at the top of the main disconnect switch
(Figure 2-12, A) and the other power wire
to the neutral block to its right (B).
4. Connect the green third wire to the ground-
ing block to its left (Figure 2-12, C).
WARNING
The machine must be
properly grounded to ensure
operator safety.
5. Make sure the other end of the ground
wire is connected to a proper earth ground.
6. Close and secure the right endframe door.
CAUTION
Do not attempt to start the
machine at this time. Leave
the disconnect switch OFF.
Gas Connection
CAUTION
The gas supply must
match the specific gas
requirements shown on
the nameplate.
The nameplate (Figure 2-2), located on the
front of the left endframe, specifies the gas
requirements of the unit. The unit requires gas
supplied at the correct pressure.
Note that the nature of the atmospheric burner
used in the machine prevents it from operating
at full capacity when in use above an altitude of
approximately 2000 feet (609 meters). For use
at higher elevations, contact the factory service
department.
If the incoming gas pressure is too high or too
low, the unit will work improperly or not at all.
Confirm the pressure of the gas supply meets the
requirements shown on the nameplate.
If a high pressure gas supply is used, an
additional regulator, mounted outside the unit,
is required. The following are based on using a
water column manometer connected upstream of
the supplied pressure regulator. A high pressure
gas supply is:
• For natural gas: more than 11” (2.75
kPa) of pressure.
• For LP gas, more than 12” (3.0 kPa).
• For manufactured gas, contact the
Factory Service Department.
For more information on checking the pressure
of the gas supply, refer to Gas Connection
Checkout on page 2-20 .
All labor and materials required for the gas
connection to the unit, except those items shipped
with the unit, are a local responsibility. Local
codes and regulations must be followed for proper
installation.
Figure 2-12: Single phase connections.
C
B
A
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