50
Fan Assembly Bushings
The fan assembly bushings should be
tightened to the specifications listed in the
following table.
Table 10 - Fan Assembly Bushing Torque
Specifications
Boiler System Startup
Before starting the boiler system for the first
time, verify the following items have been
checked:
1. Verify that electrical power is available
and that the voltage is correct and the
capacity is equal to or greater than the
unit’s MOP listed on the nameplate.
Verify that the gas supply is connected,
has been properly sized, and has been
purged of air.
2. Immediately after turning on the gas
supply, check piping for any leaks.
3. Verify that the city make-up water supply
is available and properly connected.
Open automatic air vents as shown in the
Automatic Air Vent Valves section.
4. Before applying power, review the MCS
Controller manual provided with the
chiller. Understand the operation of the
controller display panel as well as the
MCS Connect PC program. Review
manuals provided with each boiler for
proper operation of boiler controls.
5. Verify that the rotation of all pumps is
correct. The rotations have been checked
at the factory, so if any motors that are not
powered by a Variable Frequency Drive
are operating backwards two phases
should be switch at the unit power
connection.
6. Verify that any remote stop/start device
or BMS signal is connected to the chiller
controller and requesting the boiler
system to start.
7. A building load of at least 25% of the
boiler capacity should be present in order
to properly check operation.
8. Complete the general check list at the top
of the startup form to make a last check
that the boiler system is ready to operate.
Test the boiler system operation by changing
the Boiler Run/Stop switch to “Run”. The
boiler building pump should then start and
the boilers should stage on and modulate to
maintain
the
leaving
water
target
temperature. If not enough load is present to
stage on each boiler, disable individual units
through the boiler controls.
Use the startup form to record the full load
boiler water in temperature and water out
temperature as well as the amps for each
individual boiler.
When all boilers have been observed to
function correctly, enable all boilers through
boiler controls. Observe the system until it
reaches a steady state of operation. If
necessary adjust the boiler leaving water
setpoint to match desired target. For units
with BMS communication, verify that the
Bushing
Tightening Torque
(in-lbs.)
H X 1.125"
95
H X 1.375"
95
SH X 1.125"
108
SH X 1.375"
108
SD X 1.125"
108
SD X 1.375"
108
SD X 1.625"
108
SD X 1.875"
108
SK X 2.125"
180
Summary of Contents for LZ Series
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Page 27: ...27 Figure 6 Concrete Pad Mounting with Dimensions Figure 7 LZ Base ...
Page 36: ...36 Figure 17 Typical Flue Vent Piping ...
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