Bell & Gossett P81875G Series HSC-S Centrifugal Pump - Manual (Page 4)

PUMP LOCATION
Locate the pump so there is sufficient room for inspection, main-
tenance and service. If the use of a hoist or tackle is needed,
allow ample head room.
If lifting base pump is required, use a nylon string, chain, or
wire rope, hitch around both bearing supports. If lifting of the
entire pump is required, do so with slings placed under the
base rails as shown.
The best pump location for sound and vibration absorption is
on a concrete floor with subsoil underneath. If the pump loca-
tion is overhead, special precautions should be undertaken to
reduce possible sound transmission. Consult a sound specialist.
If the pump is not on a closed system, it should be placed as
near as possible to the source of the liquid supply, and located
to permit installation with the fewest number of bends or
elbows in the suction pipe.
The installation must be evaluated to determine that the Net
Positive Suction Head Available (NPSHA) meets or exceeds the
Net Positive Suction Head Required (NPSHR), as stated by the
pump performance curve. See page 9 for more details on
proper suction piping installation.
IMPORTANT
Do not install and operate Bell & Gossett Pumps, 3D Valves,
Suction Diffusers, etc., in closed systems unless the system is
constructed with properly sized safety devices and control
devices. Such devices include the use of properly sized and
located pressure relief valves, compression tanks, pressure con-
trols, temperature controls, and flow controls as appropriate. If
the system does not include these devices, consult the respon-
sible engineer or architect before making pumps operational.
4
ADDITIONAL SAFETY REQUIREMENTS:
ELECTRICAL SAFETY:
THERMAL SAFETY:
MECHANICAL SAFETY:
WARNING: Electrical Shock Hazard
Electrical connections to be made by a qualified
electrician in accordance with all applicable codes, ordi-
nances, and good practices. Failure to follow these in-
structions could result in serious personal injury or death,
or property damage.
WARNING: Electrical Overload Hazard
Three phase motors must have properly sized
heaters to provide overload and undervoltage protection.
Single phase motors have built-in overload protectors.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
WARNING: Extreme Temperature Hazard
If pump, motor, or piping are operating at extremely
high or low temperatures, guarding or insulation is re-
quired. Failure to follow these instructions could result in
serious personal injury or death, or property damage.
WARNING: Unexpected Startup Hazard
Disconnect and lockout power before servicing.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
WARNING: Excessive System Pressure Hazard
The maximum working pressure of the pump is listed
on the nameplate, do not exceed this pressure. Do not use
air to hydrotest pump. Failure to follow these instructions
could result in serious personal injury or death, or property
damage.
WARNING: Excessive Pressure Hazard
Volumetric Expansion
The heating of water and other fluids causes volumetric
expansion. The associated forces may cause failure of sys-
tem components and release of high temperature fluids.
This will be prevented by installing properly sized and
located compression tanks and pressure relief valves.
Failure to follow these instructions could result in serious
personal injury or death, or property damage.
COMPRESSION TANK
SHOULD BE LOCATED
ON THE SUCTION SIDE
OF THE PUMP
B&G REDUCING
VALVE
COLD
WATER
SUPPLY
FROM BOILER
CHILLER OR CONVER
TER
B&G ROLAIRTROL
AIR SEPARATOR
SUPPLY
TO SYSTEM
ISOLATION
VALVE
B&G CIRCUIT
SETTER
B&G TRIPLE DUTY
VALVE
WARNING: Falling Objects Hazard
Eyebolts or lifting lugs, if provided, are for lifting only
the components to which they are attached. Failure to fol-
low these instructions could result in serious personal
injury or death, or property damage.
Illustration 3
NYLON SLING,
CHAIN OR
WIRE ROPE
CHOKER
HITCH
AROUND
BEARING
FRAME