Bell & Gossett DN0132F Domestic Pump Vented Boiler Feed Units Series CME - Manual (Page 3)

OPERA TION 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.
Check motor nameplate for any lubrication requirements.
Pumps require no lubrication.
NOTICE / AUTO REST ART
Single phase motors will r estart automatically after thermal
overload protector trips.
Overload thermal relays in starters must be reset manually.
A properly installed unit should function unattended for long
periods of time. Periodic checks to assure proper operations
are highly recommended. Refer to trouble shooting section
when necessary.
A variety of control options are available and are furnished in
accordance with user specifications. Refer to wiring diagrams
(when furnished) to determine control switch settings.
The inlet strainer (when furnished) is intended to protect the
pump and system. Periodic cleaning should be included in the
maintenance schedule. Check frequently in new systems.
PUTTING THE UNIT INTO SER VICE
1. Assure that the unit is piped in accordance with instructions
on page 2.
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
possible 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. Connect the water make-up assembly to city water. Use
piping at least as large as valve piping provided. Provide a
manual fill valve if not included on the unit.
10. Boiler Level Contr ols
Assur e that the controls on and related to the boiler match
the control systems provided on the unit (see the wiring dia-
gram furnished) (applicable when electrical control panel is
furnished).
11. Check that the pump discharge pressure exceeds the max-
imum operating pressure of the boiler.
12. Manually move the make-up water float indicator and
assure that the make-up solenoid admits water.
13. Manually move the low water cut-off float switch indicator
to check for pump shut-off.
14. Remove start-up label (below) from panel (if applicable)
after complying with instructions.
15. If possible, observe operation thru several cycles.
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.
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 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.
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.
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.
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: SUBSEQUENT DAMAGE
A unit showing symptoms of possible pr oblems
(overflow, noise, leaks, vibrations, continual operation, etc.)
must be corrected immediately. Failure to follow these
instructions may result in full liability for subsequent injury or
property damage.
SAFETY INSTRUCTIONS
SEE COVER OF THIS MANUAL
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.
W ARNING: EXPLOSIBLE
The installed boiler feed unit becomes an integral part
of the boiler system. Boiler operation and maintenance
requires specific skills and training and may require licensing
or certification. The boiler feed unit must be operated and
maintained so as not to jeopardize the boiler operation.
Failure to follow these instructions could result in serious
injury, death or extensive property damage.
W ARNING: MAINTAIN BOILER SAFETY FEATURES
When connecting the boiler feed unit to the boiler ,
assure that all boiler safety controls (burner cutoff, etc.) are
and remain operational. With certain control arrangements,
dedicated boiler controllers are required for the boiler feed
pumps. Failure to follow these instructions could result in
serious injury, death or extensive property damage.
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