Xylem IM201 CentriBoost Fixed Speed Pumping Package - Manual (Page 5)

5
SeRIOUS PeRSOnAL InJURY, DeAtH AnD/OR
PROPeRtY DAMAGe.
The pressure switch is piped into the suction line. There
is an adjusting dial located inside of the control. This
adjustment controls the low suction cutout.
The differential pressure setting is fixed at 1.5 PSI.
Therefore cut in pressure will be the switch setting plus
1.5 PSI.
Although the scale is calibrated in PSI, it may not cor-
respond exactly to the actual suction gage indication.
Therefore, for critical installations, the setting should be
adjusted according to the gage reading.
The approximate settings should be set prior to placing
the unit in operation to suit the pressure conditions at
the installation.
System Pressure Switch (Simplex), Pump 1 and
Pump 2 Pressure Switch for Duplex
ELECTRICAL SHOCK HAZARD. DIS-
CONNECT AND LOCKOUT POWER
BEFORE SERVICING THE UNIT. FAILURe tO FOL-
LOW tHeSe InStRUctIOnS cOULD ReSULt In
SeRIOUS PeRSOnAL InJURY, DeAtH AnD/OR
PROPeRtY DAMAGe.
This switch is piped to the discharge header piping.
There are two adjusting screws located on the top of the
control. Facing the switch, the screw on the right hand
side sets the cut-out point. This adjustment must be made
first.
The screw to the left and towards the front sets the cut-
in point. Turn the screw until the proper cut-in point is
obtained.
Although the scales are calibrated in PSI, they may not
correspond exactly to the actual discharge gage indica-
tion. Therefore, for critical installations, the settings
should be adjusted according to the gage reading. See
wiring diagram 1SWD0 for proper settings of the sys-
tem pressure switches on a duplex unit.
Minimum Run Timer
For a simplex unit the minimum run timer is factory set
to 5 minutes. The setting should be verified before unit is
place into operation and adjusted if a shorter minimum
run time is desired. See Appendix 1 for instructions on
using the programmable pump sequence control module
to set the minimum run timers for a duplex unit. Appen-
dix 1 also contains information about setting additional
parameters that are specific to duplex units.
Aquastat
The aquastat for high temperature cut out is factory set
for 100° F and should be adjusted if a different cut out
temperature is desired. The switch should not be set
above 5° F.
Optional Tank
Since a variety of different tanks can be used with either
the simplex or duplex units refer to the specific IOM that
was shipped with the tank for installation and operating
instructions.
SectIOn 3
pUTTING THE UNIT INTO SERVICE
PREVENT SUBSEQUENT DAMAGE.
A UNIT SHOWING SYMPTOMS OF
POSSIBLE PROBLEMS (NOISE, LEAKS, VIBRATION,
AND/OR CONTINUAL OPERATION) MUST BE COR-
RECTED IMMEDIATELY. FAILURe tO FOLLOW
tHeSe InStRUctIOnS cOULD ReSULt In PROP-
eRtY DAMAGe AnD/OR MODeRAte PeRSOnAL
InJURY.
Simplex package - for capacities up to 110 GPM.
Whenever the city water pressure falls below the system
pressure switch setting the pump will start through a
power relay.
When the system pressure rises above the setting of the
system pressure switch the pump will stop (provided the
minimum run timer has expired.)
Duplex package - for capacities up to 0 GPM.
The lead pump operates identically to the Simplex pack-
age. However, if the draw rate continues to increase be-
yond the capacity of the lead pump, the system pressure
will fall and cause Pump  On/Off pressure switch to trip
which in turn starts the lag pump.
Both pumps will continue to run until the system pres-
sure rises above the setting of Pump 1 and Pump  pres-
sure switches (provided the minimum run timers have
expired.)
For the duplex unit Pump  also acts as a Standby for
Pump 1. In the event there is a call for Pump 1 and it has
failed for whatever reason, Pump  will start and act as
the lead pump. Once Pump 1 is fixed, place the Pump 1
HOA into the Off/Reset position and then back to Auto
to reset the unit.
Simplex and Duplex units will run when there is demand
unless one of the following conditions occurs:
1) The optional low suction pressure switch trips due
to low city pressure
) The high temperature cut out switch trips due to
the pump deadheading.
The low suction condition will reset automatically
when city pressure returns to an acceptable level.
If the unit cuts out on high temperature the unit can
reset automatically when there is demand by drawing
cooler water throughout the unit and across the tem-
perature sensor. This will cool the sensor and cause
it to change state and restart the pump. A manual
purge can be done by running the unit in "Hand" for
about 5 seconds. The unit can then be put back into
"Auto" for normal operation.
AdJUSTmENTS ANd SETTINGS
Low Suction Pressure Switch (Optional)
ELECTRICAL SHOCK HAZARD.
SINGLE PHASE OR THREE PHASE AC
POWER. DISCONNECT AND LOCKOUT POWER
BEFORE SERVICING THE UNIT. FAILURe tO FOL-
LOW tHeSe InStRUctIOnS cOULD ReSULt In
CAUTION
WARNING
WARNING