•
Use the proper amount of lubricant. Too much lubricant results
in churning, unnecessary power consumption, rapid heating to
a high temperature and inadequate lubrication.
Normal bearing temperatures vary with the seasons and
environment and may range from 0 to 250 °F (-18 to 121
°C). A continuous rise from the established, normal
operating temperature indicates trouble and probable
failure of the bearing. Shut down the pump immediately.
5
.1.1
Recommended products
Follow the driver manufacture's recommendations for lubrication
and service.
5
.2
Checking rotation
WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply before you start any work
on the product.
Three-phase motor shaft rotation can be reversed by
switching any two of the three power leads.
Do not attempt to switch any leads in a single-phase
motor to change the direction of rotation. The rotation of
most single-phase motors is determined by internal wiring
and cannot be changed easily.
1.
Disconnect the power supply.
2.
Lockout-Tagout the power supply.
3.
Rotate the motor shaft by hand in both directions. Verify that
the motor spins without binding.
4.
Momentarily energize the motor. Verify that the motor spins in
the direction indicated on the pump volute.
5
.3 Check list
5
.3.1
Flushing the system
Before installing the pump, clean the system to remove debris, such
as stubs of welding rod, welding slag, and loose scale. Protect the
pump and other sensitive parts with startup strainers. Remove the
start-up strainers after the flushing cycle has been completed.
5
.3.2
System decontamination
After the system has been flushed to remove debris, determine
if the system needs to be decontaminated. If the system needs to
be decontaminated, it must be done before priming and filling the
pump.
5
.3.3
Priming
The pump should not be run unless it is completely filled with liquid,
as there is danger of damaging some of the pump components.
If the system has suction pressure, follow these steps:
1.
Bleed all air from the pump casing and suction pipe by the
opening of the automatic relief valve at the top of the pump.
2.
Rotate the shaft a few times, if possible, to evacuate any air
trapped inside the impeller passages.
5
.3.4
Stuffing box
The function of a stuffing box is to limit or eliminate leakage of the
pumped fluid and to prevent air from entering along the shaft.
Pumps are equipped with packing seals. These instructions are
intended for pumping units handling water.
5
.3.5
Packed type stuffing box
A packed type stuffing box must correspond to the suction
conditions of the installation. The pump is shipped with the packing
installed unless otherwise specified by the customer.
Carefully check the packing, allowing a slight leakage for
lubrication. Do not force the packing into a leak-proof position as
this will create excessive friction and cause damage to the packing
or shaft sleeve.
Maximum packing life can be expected when the leakage
approximates a minimum of 40-60 drops per minute. A reduction of
leakage reduces the life of both the packing and shaft sleeve. If
leakage is excessive, tighten the gland bolts evenly, about 1/6 of a
turn at a time. Do not be confused if the leakage seems to increase
after an adjustment of the packing has been made. The leakage will
normally reduce after a period of time as the packing adjusts itself
to its new position.
Keep in mind that it takes time for newly installed packing to "run-in"
and that during this initial period, frequent attention and adjustments
are necessary. Achieving the desired results will sometimes take
several days.
Peerless Pump recommends the use of lantern rings and
water seal lines
5
.3.6
Recommended packing
Recommended stuffing box packing arrangements for use with
water:
Inlet pressure
range
PTFE graphited
synthetic lattice
braided Crane
C1065 or C1070 /
C89835 Bronze
Leakage rate
0 psiG - 100 psiG [0
- 6.9 bar]
PTFE graphited
synthetic lattice
braided Crane
C1065 or C1070
SAE 40 Bronze or
Stainless Steel
20 to 50 drops/
minute
All UL/ULC/FM listed fire pumps will have water seal
piping regardless of the suction pressure.
The stuffing box gland must not be too tight during startup
in order to let sufficient liquid lubricate the shaft and the
packing.
Once the stuffing box housing and stuffing box gland have reached
approximately the same temperature as that of the pump parts, the
running-in of the stuffing box gland has been completed. If the
stuffing box leaks too much, retighten slightly and evenly while the
pump is running. To ensure continuous lubrication, a few drops
should always drop from the stuffing box to protect the packing or
shaft sleeve against damage, see chart for drop rate
recommendations.
When the leakage can no longer be controlled by adjusting the
gland, all rings of packing should be replaced. The addition of a
single ring to restore gland adjustment is not recommended.
If the pump is to be left idle for a long period of time, we
recommend replacing the packing prior to restarting the pump.
5
.4 Starting up the product
5
.4.1
Starting the pump
Prior to making an initial start, after installation or major
maintenance check the following:
1.
Refer to local fire code.
2.
Correct installation and rotation of driver.
3.
Bearing lubrication on driver.
4.
Proper lubrication for stuffing boxes. For pumps having
mechanical shaft seals, make certain that the liquid
temperature, pressure, cooling and lubrication of seal faces all
meet the manufacturer's requirements.
1
4
English (US)