Bell & Gossett DN0136C Domestic Pump Vacuum Heating Units Series VCL - Manual (Page 6)

6
PUTTING THE CONDENSA TE PUMPS INTO SERVICE
1. Assure that the unit is piped in accordance with instructions
and diagrams.
Confirm that incoming power agrees with ratings of motors and
that wiring diagrams (when furnished) match specificatons and
job requirements.
A variety of control options are available. Refer to the wiring
diagram (when furnished) for information on electrical controls.
2. Isolate tank before performing any system leak test. Do not
pressurize the tank as part of the leak test. Failure to do this
can result in serious injury or death.
3. Check floats and make-up solenoid for proper operation.
4. Check power leads in accordance with wiring diagram
enclosed in control cabinet (when furnished).
5. Install drain plugs.
6. Fill receiver half full of water to prime pump(s) and prevent pos-
sible damage to pump seals. Avoid freezing conditions after
unit receiver has been filled.
7. Check for proper rotation of all three phase motors. Rotation
must be clockwise looking down on the motor as indicated by
directional arrow on pump casting. If pump runs backwards,
interchange two wires (3 phase only).
Vacuum switches are factory set per job specifications and read-
justment should not be necessary. Refer to switch manufacturer’s
literature for details of adjusting procedure. If resetting is required,
it is helpful to disconnect wiring and set one switch at a time. The
“lead” switch must make and break at a slightly deeper vacuum
than the “lag” switch.
The electric alternator (when provided) must always operate from
the lead vacuum switch.
An optional temperature limit switch may be provided to add cool-
ing water to the hurling chamber when hurling water temperature
rises above 160ºF or to cut out the vacuum pumps when the return
condensate temperature rises above 180ºF. These are provided to
improve vacuum efficiency or to protect the vacuum pumps from
damage. The switch should close on rising temperature.
Remove start-up label (below) from panel (if applicable) after com-
plying with instructions.
W ARNING: HIGH VOLTAGE
Disconnect and lock out power befor e connecting or
servicing unit. Failure to follow these instructions could result
in serious injury or death.
CAUTION: DO NOT REVERSE
Reverse operation can cause extensive damage to
pumps. Jog the motor to test for direction of rotation. Failure
to follow these instructions could result in injury or property
damage.
CAUTION: DO NOT RUN DRY.
SEAL DAMAGE MAY OCCUR.
Inspect pump seal r egularly for leaks. Replace as required.
Failure to follow these instructions could result in injury or
property damage.
W ARNING: EXPLOSIBLE
Do not pr essurize receiver. Isolate receiver during leak
test. Do not plug overflow. Do not restrict vent opening to
atmosphere. Open valves slowly. Failure to follow these
instructions could result in serious injury or death.
PUTTING THE V ACUUM PRODUCER INTO SERVICE
WARNING: AVOID REACTIVE CHEMICALS
A void drawing explosive, flammable, highly corrosive
or otherwise highly reactive liquids or vapors into the hurling
chamber. Failure to follow these instructions could result in
serious injury, death or extensive property damage.
1. Assure that the unit is piped in accordance with instructions.
2. Isolate tank before performing any system leak test. Do not
pressurize the tank as part of the leak test. Failure to do this
can result in serious injury or death.
3. Check floats and alternators for free operation.
4. Check power leads in accordance with wiring diagram
enclosed in control cabinet (when furnished).
5. Install drain plugs.
6. Fill receiver half full of water to prime pump(s) and prevent pos-
sible damage to pump seals. Avoid freezing conditions after
unit receiver has been filled.
7. Check for proper rotation of all three phase motors. Rotation
must be clockwise looking down on the motor as indicated by
directional arrow on pump casting. If pump runs backwards,
interchange two wires (3 phase only).
8. Throttle plug cock in discharge line until pressure at pump
(while pump is discharging) approaches pump rated pres-
sure. Tighten plug nut to secure adjustment.
9. Remove start-up label (below) from panel (if applicable)
after complying with instructions.
10. If possible, observe operation thru several cycles.
W ARNING: HIGH VOLTAGE
Disconnect and lock out power befor e connecting or
servicing unit. Failure to follow these instructions could result
in serious injury or death.
CAUTION: DO NOT REVERSE
Reverse operation can cause extensive damage to
pumps. Jog the motor to test for direction of rotation. Failure
to follow these instructions could result in injury or property
damage.
CAUTION: DO NOT RUN DRY.
SEAL DAMAGE MAY OCCUR.
Inspect pump seal r egularly for leaks. Replace as required.
Failure to follow these instructions could result in injury or
property damage.
W ARNING: EXPLOSIBLE
Do not pr essurize receiver. Isolate receiver during leak
test. Do not plug overflow. Do not restrict vent opening to
atmosphere. Open valves slowly. Failure to follow these
instructions could result in serious injury or death.
ELECTRICIAN/INST ALLER/OPERATOR
REMOVE AND DESTROY THIS T AG AFTER —
1. ASSURING THAT ALL PUMPS ROTATE CLOCKWISE PER ARROWS CAST ON VOLUTES. (JOG
PUMP MOMENTARILY TO TEST – INTERCHANGE ANY TWO MOTOR POWER WIRES TO
REVERSE 3PH MOTORS.)
2. ASSURING THAT SHIPPING LOCKS HAVE BEEN REMOVED FROM ALL FLOAT SWITCHES.
ELECTRICIAN/INST ALLER/OPERATOR
REMOVE AND DESTROY THIS T AG AFTER —
1. ASSURING THAT ALL PUMPS ROTATE CLOCKWISE PER ARROWS CAST ON VOLUTES. (JOG
PUMP MOMENTARILY TO TEST – INTERCHANGE ANY TWO MOTOR POWER WIRES TO
REVERSE 3PH MOTORS.)
2. ASSURING THAT SHIPPING LOCKS HAVE BEEN REMOVED FROM ALL FLOAT SWITCHES.