4
WIRING
INSTRUCTIONS
Remove the scr
ews securing the conduit box cover (wiring
compartment) and lift off the cover. Attach the appropriate size
connector to the hole in the side of the conduit box.
OPERA
TIONAL INSTRUCTIONS
SYSTEM PREPARATION
Prior to pump startup, closed heating and cooling systems
should be flushed and drained with clean water. The system
should then be filled with clean water have a PH between 7
and 9.
LUBRICA
TION
Series 90 Pumps with 5 HP and smaller motors ar
e perma-
nently lubricated. Pumps with 7
1
/
2
, 10 and 15 HP motors are
furnished with grease fittings and should be lubricated in
accordance with the manufacturer’s nameplate instructions.
For future lubrication, Bell & Gossett supplies a high quality
lubricant specifically for this purpose which can be purchased
from and Bell & Gossett representative (Part No. L23401).
ROT
ATION
Pump r
otation is clockwise when viewed from the back of the
motor. An arrow is provided to show rotational direction.
PRIMING
AND STARTING
Befor
e starting, the Series 90 Pump must first be filled with
water. Manual priming may be necessary if the system does
not fill the pump body automatically. Vent plugs are provided
on the pump body to vent the air.
The pump should be started with the discharge valve closed
and the suction valve fully open. After the pump is at operating
speed, the discharge valve should be opened gradually.
SER
VICE INSTRUCTIONS
GENERAL INSTRUCTIONS
1.
Keep motor properly lubricated if required.
2. If the pump is to be exposed to freezing temperatures, drain
the pump.
PERIODIC
INSPECTION
Inspect the pump r
egularly for leaking seals, worn gaskets,
and loose or damaged components. Replace or repair as
required.
REPLACING
THE SEAL
The electrical supply must be disconnected and locked out of
service. Loosen the conduit box cover screws and remove the
cover. Disconnect conduit and wiring.
Close the valves on the suction and discharge sides of the
pump (if no valves have been installed, it will be necessary to
drain the system).
Loosen the volute capscrews but do not remove them. Shift
the pump position slightly to allow the pressurized water to
escape.
Remove the volute capscrews and remove the pump assembly
from the volute.
W
ARNING: ELECTRICAL SHOCK HAZARD
Disconnect and lockout the power befor
e making
electrical connections. Failure to follow these instructions
could result in serious personal injury, death and/or property
damage.
W
ARNING: ELECTRICAL SHOCK HAZARD
Disconnect and lockout the power befor
e servicing.
Failure to follow these instructions could result in serious
personal injury or death.
W
ARNING: ELECTRICAL OVERLOAD HAZARD
Thr
ee phase motors must have properly sized heaters
to provide overload and under voltage protection. Single
phase motors have built-in overload protectors. Failure to
follow these instructions could result in serious personal
injury or death.
CAUTION:
SEAL DAMAGE HAZARD
Do not run the pump dry – seal damage may occur
.
Failure to follow these instructions could result in moderate
personal injury and/or property damage.
W
ARNING: HOT WATER LEAKAGE HAZARD
Pr
essurize the pump body slowly while checking for
leaks at all joints with gaskets. Failure to follow these
instructions could result in serious personal injury and/or
property damage.
W
ARNING: UNEXPECTED STARTUP HAZARD
Disconnect and lockout power befor
e servicing.
Failure to follow these instructions could result in serious per-
sonal injury, death and/or property damage.
CAUTION:
EXTREME TEMPERATURE HAZARD
Allow the pump temperatur
e to reach acceptable
level before proceeding. Open drain valve and do not pro-
ceed until the liquid has completely drained. If the liquid
does not stop flowing from drain valve, then the isolation
valves are not sealing and should be repaired before con-
tinuing. After the liquid has stopped flowing, leave the drain
valve open and continue. Remove the drain plug located on
the bottom of the pump volute. Do not reinstall plug or close
drain valve until the reassembly is complete. Failure to follow
these instructions could result in moderate personal injury
and/or property damage.
W
ARNING: EXCESSIVE PRESSURE HAZARD
Make certain that the inter
nal pressure is relieved
before continuing. Failure to follow these instructions could
result in serious personal injury and/or property damage.
W
ARNING: ELECTRICAL SHOCK HAZARD
Be certain that all connections ar
e secure and the
conduit box cover is closed before electrical power is con-
nected. Failure to follow these instructions could result in
serious personal injury or death.
