installation &
operating instructions
Design Envelope
4300
&
4380
Vertical In-line Pumping Unit
28
6.2 lubrication
Pump
Lubrication is not required. There are no bearings in the pump
that need external lubrication service.
Large Design Envelope
4300
units are installed with a shaft
bushing located beneath the impeller that is lubricated from the
pump discharge.
Motor
Follow the lubrication procedures recommended by the motor
manufacturer. Many small and medium sized motors are per-
manently lubricated and need no added lubrication. Generally,
if there are grease fittings evident the motor needs periodic
lubrication. None if not.
Check the lubrication instructions supplied with the motor for
the particular frame size indicated on the motor nameplate.
6.3 mechanical seal
Mechanical seals require no special attention. The mechanical
seal is fitted with a flush line. The seal is flushed from discharge
of the pump casing on Design Envelope
4300
pumps and from
the suction on Design Envelope
4380
pumps.
The Design Envelope
4300
pump is flushed from the pump
discharge because the mechanical seal chamber is isolated
from the liquid in the pump by a throttle bushing. Because the
seal chamber is isolated, seal environmental controls such as
filters and separators, when installed in the Design Envelope
4300
flush line are very effective, as only the seal chamber
needs cleansing, and will prolong seal life in
hvac
systems.
Do not run the pump unless properly filled with water as the
mechanical seals need a film of liquid between the faces for
proper operation.
Mechanical seals may weep slightly at start-up. Allow the
pump to continue operating for several hours and the mechani-
cal seal to seat properly prior to calling for service personnel.
warning
Hydronic system components may be pressurized
which, if suddenly released, can cause serious injury or
death. When performing any kind of service to the
pump, the pressure must be released in the system
and the unit should be properly drained before starting
any service work.
6.3.1
mechanical seal replacement instructions
for rigid split- coupled pumping units (series
4300 & 4322)
1
4
10
9
59
54
61
55
62
55
05
21
2
3
140
148
21
A
62
C
62
B
62
A
144 145
155
156
149
52
163
caution
Do not use oil, Vaseline or other petroleum or silicon
based products for seal elastomer lubrication.
Otherwise elastomer swelling may occur, causing seal
failure. Recommended: International Products Corp p-
80
Rubber Lubricant Emulsion in USA & UK www.ipcol.com
Seal Removal
An important feature of the rigid split-coupled pump is that the
design permits removal of the mechanical seal without disturb-
ing the pump, motor or electrical wiring.
a
Disconnect the power supply at the main switch and close
the isolating valves on the suction and discharge. Empty
casing by removing drain plug(s) located at the bottom.
b
Loosen off the seal collar set screws
(62A)
Remove the
coupling screws and lock washer
(144,145)
and separate
the coupling halves
(140)
. Remove the motor shaft key
(05)
and the pump shaft key
(149)
.
Summary of Contents for Design Envelope 4300
Page 2: ......
