Table of Contents
Advertisement
FORM 160.67-O2
ISSUE DATE: 10/9/2020
SECTION 2 - PRE-STARTUP AND SYSTEM OPERATING PROCEDURES
OVERVIEW
The procedures that must be completed prior to each
startup depend on the extent of time the chiller has
been idle and whether any maintenance has been per-
formed on the system or piping components since the
initial installation was completed. The inlet steam line
blow-down should have been performed at installation
per Form 160.67-N2. Because a clean steam supply is
of utmost importance, the procedure is repeated in this
manual. Refer to Sections 6 and 7 of this manual for
additional procedures that should be performed peri-
odically to ensure trouble-free operation.
Before applying power to the chiller,
ensure that the compressor oil heater
protector overload (OL1) and all motor
protector overloads in the Power Panel are
in the "OFF/Tripped" position. Remove
fuses FU10, FU11, and FU12 to prevent
premature operation of the compressor
oil pump. Do not switch motor protectors
on or replace fuses until instructed in the
procedures below.
PRE-STARTUP PROCEDURES – INITIAL AND
AFTER LONG TERM SHUTDOWN
The following procedures must be performed at the
initial startup of the chiller immediately after the in-
stallation is completed as detailed in Form 160.67-
N2. Some of these procedures are also required if the
chiller has been shutdown for 1 month or longer or if
any repairs were performed on the inlet steam piping or
chiller components. Depending on the actual length of
shutdown and the condition of the oil, steam strainers,
etc., additional maintenance procedures may need to
be performed prior to startup. Refer to Sections 6 and
7 of this manual.
Prior to and during the following procedures, all pres-
sure and temperature displays on the OptiView™
screens should be observed to verify that the displayed
values are as expected for the present ambient tempera-
tures and condition of the chiller components (oil heat-
er on, oil pump running etc.). If displays are not cor-
rect, perform diagnostic checks per Form 160.67-M3
and correct the problem prior to operating the chiller.
JOHNSON CONTROLS
Removal of foreign material from the
inlet steam piping is the responsibility of
the party installing the piping. Be sure to
blow out and clean all steam lines before
connecting to the turbine. Failure to do so
may result in damage to the steam strainer
screen and other internal parts. Johnson
Controls accepts no responsibility for
damage resulting from the entrance of
foreign materials.
CHECK THE STATUS OF THE MAIN STEAM
SUPPLY
Ensure that the steam supply is available at the tem-
perature and pressure required to achieve the design
capacity of the chiller. JOHNSON CONTROLS as-
sumes no responsibility in regard to pressure or tem-
perature drops. the performance of the turbine speci-
fied is based upon the inlet pressure and temperature as
measured at the turbine steam inlet flange.
BLOW-DOWN THE INLET STEAM LINE
Newly constructed steam piping or existing piping that
has been repaired or modified should be blown-down
to remove scale, weld beads and any other foreign ma-
terial. A blow-down should also be performed prior
to starting the turbine after an extended shutdown to
remove any accumulated rust. Such material can cause
severe damage if it enters the steam turbine.
The blow-down connection should be as close to the
turbine as possible. The diameter of the blow-down
connection should be a minimum of one half the diam-
eter of the line being blown-down to ensure that steam
velocity in the piping is high enough to break loose and
carry away any foreign material stuck to the inside of
the piping.
Blow-down should be done before the piping is insu-
lated. Steam at full temperature and pressure should be
bled through the piping.
After the piping has been warmed up, the valve in the
blow-down connection should be opened wide for
about 15 seconds to allow live steam to blow out any
loose material in the piping. Piping should be allowed
to cool down to room temperature, about 6-8 hours.
2
19
Advertisement
Table of Contents
