Teikoku USA | Chempump
Instruction Manual G-Series
9
2. Installation
2.1 Receipt Inspection
1. Avoid rough handling during loading, transportation and un-
loading.
2. Visually inspect the shipping container for evidence of dam-
age during shipment.
3. Check unit to see that suction, discharge, and any other con-
nections are covered.
4. Inspect the suction, discharge and any other connections gas-
ket seating surface to be certain that they are clean of foreign
matter and free from nicks, gouges, and scratches.
5. Check phase resistance and megger resistance to ground of
the motor windings. Refer to
Table 4-9, page 27
.
6. Check all nameplate data against shipping papers.
7. Caution should be observed during handling, so as not to
bend the circulation line.
2.1.1 Storage Note
In situations where a pump is to be stored for a period of time
prior to installation, and where the climate experiences wide
temperature changes and high humidity, the terminal box must
be sealed to prevent moisture from entering the motor winding
area.
2.2 Structural
The pump design and construction eliminates the need to align
the pump and motor. The pump should be supported using the
mountings provided and mounted so that its weight is properly
supported. Suction and discharge piping must be properly
supported and aligned so that no strain is placed on the pump
casing.
1. Remove burrs and sharp edges from flanges when making
up joints.
2. When connecting flanged joints, be sure inside diameters
match within 1/16" so as not to impose a strain on the pump
casing.
3. Use pipe hangers or supports at intervals as necessary.
2.2.1 Pump Location
Locate the pump as close as possible to the fluid supply with a
positive suction head. Installations with suction lift are possible
but not recommended.
Since standard pumps are not self-priming, provide for initial
priming and for maintaining a primed condition. Location of the
pump and arrangement of the system should be such that suf-
ficient NPSH (Net Positive Suction Head) is provided over vapor
pressure of the fluid at the pump inlet. NPSH requirements at the
design point are stated on the pump order copy. For additional
design points, refer to the corresponding performance curves
placed in the Appendix of this manual.
Note:
Experience has proven that most pump troubles result from
poor suction conditions including insufficient NPSH. The suction
line must have as few pressure drops as possible and available
NPSH MUST be greater than required NPSH.
Depending on job conditions, available NPSH can sometimes be
increased to meet the NPSH required by the pump for satisfactory
operation. NPSH can be tailored by changes in the piping, in
liquid supply level, and by several other methods. Refer to
Appx.
B. Troubleshooting
.
2.2.2 Mounting and Alignment
Canned motor pumps combine a pump and motor in a single
hermetically sealed unit. No tedious coupling alignment is required
as the pump has no external coupling between pump and motor.
All models can be mounted in any position except the two-stage
Model GLD, which must be mounted with suction and discharge
“up” unless otherwise allowed. For mounting with suction and
discharge on the side or in any other position, modifications must
be made to the standard internal venting arrangement.
Standard Chempump
TM
Models GA, GB, GC and GVBS can be
pipeline mounted. However, bases are offered on all models. You
merely have to set the pumps on a foundation strong enough to
support their weight. There is no need to bolt down or grout any
canned motor pump.
Be sure that suction and discharge piping are properly aligned so
that no strain is placed on the pump casing by out-of-line piping.
All G-Series models are provided with a specially made base
designed to facilitate inspection and repair. See
Figure 2-1
.
2.2.3 Piping Data
Observe the standards of the Hydraulic Institute when sizing and
making up suction and discharge piping. For Reverse Circulation,
Pressurized Circulation, and Back-Flush installations, refer to
Figure 2-4
,
2-5, and 2-6
. Follow these procedures below for all
installations:
1. Remove burrs and sharp edges when making up joints.
2. When using flanged joints, be sure inside diameters match
properly. When gasketing flanged joints, do not cut flow hole
smaller than flange opening.
3. Use pipe hangers or supports at necessary intervals.
4. Provide for pipe expansion when required by liquid tempera-
ture.
5. When welding joints, avoid possibility of welding shot entering
the suction or discharge line, and thereby entering the pump.
Caution!
Do not weld pipe when it is connected to pump.
6. Do not spring piping when making up any connections.
