Bell & Gossett S13213A MiniBooster Pumping Package - Manual (Page 5)

5
3.0 PUTTING THE UNIT INTO SERVICE
3.1 Simplex package - for capacities up to 110 GPM.
3.2 Whenever the city water pressure falls below the sys-
tem pressure switch setting the pump will start
through a power relay.
3.3 When the system pressure rises above the setting of
the system pressure switch the pump will stop (pro-
vided the minimum run timer has expired.)
3.4 Duplex package - for capacities up to 220 GPM.
3.5 The lead pump operates identically to the Simplex
package. However, if the draw rate continues to
increase beyond the capacity of the lead pump, the
system pressure will fall and cause Pump 2 On/Off
pressure switch to trip which in turn starts the lag
pump.
3.6 Both pumps will continue to run until the system
pressure rises above the setting of Pump 1 & Pump 2
pressure switches (provided the minimum run timers
have expired.)
3.7 For the duplex unit Pump 2 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 2 will
start and act as the lead pump. Once Pump 1 is
fixed, place the Pump 1 HOA into the Off/Reset posi-
tion and then back to Auto to reset the unit.
3.8 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
2) 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.
3.9 ADJUSTMENTS AND SETTINGS
3.10 Low Suction Pressure Switch (Optional)
3.11 The pressure switch is piped into the suction line.
There is an adjusting dial located inside of the con-
trol. This adjustment controls the low suction cutout.
3.12 The differential pressure setting is fixed at 1.5 psi.
Therefore cut in pressure will be the switch setting
plus 1.5 psi.
3.13 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.
3.14 The approximate settings should be set prior to plac-
ing the unit in operation to suit the pressure condi-
tions at the installation.
3.15 System Pressure Switch (Simplex), Pump 1 & Pump 2
Pressure Switch for Duplex
3.16 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.
3.17 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.
3.18 Although the scales are calibrated in PSI, they may
not correspond exactly to the actual discharge gage
indication. Therefore, for critical installations, the
settings should be adjusted according to the gage
reading. See wiring diagram 1SWD04 for proper set-
tings of the system pressure switches on a duplex
unit.
3.19 Minimum run timer
3.20 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. Appendix 1 also contains
information about setting additional parameters that
are specific to duplex units.
3.21 Aquastat
3.22 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 225°F.
3.23 Optional Tank
3.24 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.
CAUTION: PREVENT SUBSEQUENT DAMAGE. A
UNIT SHOWING SYMPTOMS OF POSSIBLE PROB-
LEMS (NOISE, LEAKS, VIBRATION, AND/OR CONTINUAL
OPERATION) MUST BE CORRECTED IMMEDIATELY.
FAILURE TO FOLLOW THESE INSTRUCTIONS COULD
RESULT IN PROPERTY DAMAGE AND/OR MODERATE
PERSONAL INJURY.
WARNING: ELECTRICAL SHOCK HAZARD. SINGLE
PHASE OR THREE PHASE AC POWER. DISCON-
NECT AND LOCKOUT POWER BEFORE SERVICING THE
UNIT.
FAILURE TO FOLLOW THESE INSTRUCTIONS COULD
RESULT IN SERIOUS PERSONAL INJURY, DEATH,
AND/OR PROPERTY DAMAGE.
WARNING: ELECTRICAL SHOCK HAZARD. DIS-
CONNECT AND LOCKOUT POWER BEFORE SER-
VICING THE UNIT.
FAILURE TO FOLLOW THESE INSTRUCTIONS COULD
RESULT IN SERIOUS PERSONAL INJURY, DEATH,
AND/OR PROPERTY DAMAGE.