Bell & Gossett DN0178B HS Single Phase Simplex Control Panel User Manual
Page 2
OPERATION AND MAINTENANCE
Operators must be familiar with all sections of this manual
to understand the operation of the unit.
Hot Water, steam and electricity can be hazardous.
NOTICE / AUTO RESTART
Single phase motors will restart automatically after thermal
overload protector trips.
A properly installed unit should function unattended for
long periods of time. Periodic checks to assure proper
operation are highly recommended. Refer to trouble shoot-
ing section when necessary.
Refer to wiring diagrams to determine control switch
settings.
UNIT WIRING
Select the required configuration for the control panel to fit
the application.
CAUTION: Verify that the incoming voltage
and the motor voltage correspond to the configuration of
the panel. Rewire jumper terminals if necessary.
Disconnect all power.
Identify incoming power and motor voltage configuration
from the Selection Chart below.
DESCRIPTION
The Hoffman Single Phase Simplex Electrical Control
Panel is designed to provide a reliable means of controlling
one 120 volt or 230 volt (3 wire) single phase pump instal-
lation that
does not exceed a FLA of 20 amps.
PRELIMINARY INSPECTION
Assure that there is no shipping damage.
Assure that the nameplate ratings agree with the job spec-
ifications and actual conditions.
Assure all connections are secure and made per NEC
requirements.
HANDLING
Use care in installing unit.
LOCATION
Place unit for easy access.
Allow adequate space for servicing. Check ambient
conditions.
Notice: Insulation temperature limits. Ventilate as required.
ELECTRICAL WIRING AND CONTROLS
Connect power wiring per NEC. Recheck nameplate vs.
specifications and conditions.
PUTTING THE UNIT INTO SERVICE
Assure that the main power has been disconnected.
Wire unit per National Electrical Code. See representative
wiring diagrams.
Observe operation of unit through several cycles.
SELECTION CHART
Incoming
Motor
Connect Power
Connect Pump Motor
Jumper
Connect Float Control
Voltage
Voltage
to Terminals
to Terminals
Terminals
to Terminals
230/1/60
230/1/60
N, L2, L1
T1, T2
—
L1, 2
115/1/60
115/1/60
L2, L1
T1, T2
N, L2
L1, 2
2
WARNING: HIGH VOLTAGE ELECTRICITY
Disconnect and lock out power before connecting or
servicing unit. Failure to follow these instructions could
result in serious injury or death.
WARNING: HIGH VOLTAGE ELECTRICITY
Disconnect and lock out power before connecting or
servicing unit. Failure to follow these instructions could
result in serious injury or death.
WARNING: HIGH VOLTAGE ELECTRICITY
Disconnect and lock out power before connecting or
servicing unit. Failure to follow these instructions could
result in serious injury or death.
CAUTION: SUBSEQUENT DAMAGE
A unit showing symptoms of possible problems must
be corrected immediately. Failure to follow these instruc-
tions could result in full liability for subsequent injury or
property damage.
SAFETY INSTRUCTIONS
See Cover of this Manual.
WARNING: HIGH VOLTAGE ELECTRICITY
Disconnect and lock out power before connecting or
servicing unit. Failure to follow these instructions could
result in serious injury or death.