Bell & Gossett DN0412C HS Vented Boiler Feed Units Series HSM - Manual (Page 3)

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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 pres-
surize 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 direc-
tional arrow on pump casting. If pump runs backwards, inter-
change two wires (3 phase only).
8. Throttle plug cock in discharge line until pressure at pump (while
pump is discharging) approaches pump rated pressure. Tighten
plug nut to secure adjustment.
9. Connect the water make-up assembly to city water. Use piping at
least as large as the valve piping provided. Provide a manual fill
valve if not included on the unit.
10. Boiler Level Controls — Assure that the controls on and related to
the boiler match the control systems provided on the unit (see the
wiring diagram furnished) (applicable when electrical control panel
is furnished).
11. Check that the pump discharge pressure exceeds the maximum
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 com-
plying with instructions.
15. If possible, observe operation thru several cycles.
OPERA TION AND MAINTENANCE
Operators must be familiar with all sections of this manual to under -
stand 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 RESTART
Single phase motors will restart 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 operation are highly recom-
mended. Refer to trouble shooting section when necessary.
A variety of control options are available and are furnished in accor-
dance with user specifications. Refer to wiring diagrams (when fur-
nished) 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.
WARNING / HIGH VOLTAGE: Disconnect and lock out
power before connecting or servicing unit. Failure to follow
these instructions could result in serious injury or death.
WARNING / 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 fol-
low these instructions could result in serious injury, death or
extensive property damage.
CAUTION: DO NOT RUN DRY.
SEAL DAMAGE MAY OCCUR.
Inspect pump seal regularly for leaks. Replace as required.
Failure to follow these instructions could result in injury or prop-
erty damage.
CAUTION / DO NOT REVERSE: Reverse operation can
cause extensive damage to pumps. Jog the motor to test
from direction of rotation. Failure to follow these instructions
could result in injury or property damage.
WARNING / HIGH VOLTAGE: Disconnect and lock
out power before connecting or servicing unit. Failure to
follow these instructions could result in serious injury or death.
WARNING / 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.
SAFETY INSTRUCTIONS
SEE COVER OF THIS MANUAL.
CAUTION / SUBSEQUENT DAMAGE: A unit showing
symptoms of possible problems (overflow, noise, leaks,
vibrations, continual operation, etc.) must be corrected immedi-
ately. Failure to follow this instruction may result in full liability for
subsequent injury or property damage.
WARNING: EXPLOSIBLE
Do not pressurize 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.
WARNING: EXPLOSIBLE
Do not pressurize 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/INSTALLER/OPERATOR
REMOVE AND DESTROY THIS TAG 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.