BLACKMER SNP1.25, Installation, Operation And Maintenance Instructions

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INSTALLATION
NOTICE:
Blackmer pumps must only be installed in systems
designed by qualified engineering personnel. System
design must conform with all applicable regulations and
codes and provide warning of all system hazards.
Hazardous voltage.
Can shock, burn or
cause death.
Install, ground and wire to local and
National Electrical Code requirements.
Install an all-leg disconnect switch near
the unit motor.
Disconnect and lockout electrical power
before installation or service
Electrical supply MUST match motor
nameplate specifications.
Motors equipped with thermal protection automatically
disconnect motor electrical circuit when overload exists.
Motor can start unexpectedly and without warning.
Hazardous pressure
can cause personal
injury or property
damage
An external bypass valve and/or internal
relief valve must be installed in the
system to protect the pump from
excessive pressure.
Hazardous pressure
can cause personal
injury or property
damage
Incorrect bypass valve or internal relief
valve settings can cause pump
component failure, personal injury, and
property damage.
NOTICE:
Blackmer SNP Pump sizes 1.25, 1.5, 2 and 2.5 may or may
not be fitted with an bolt-on relief valve. If the bolt-on
relief valve is not supplied, an external bypass valve
MUST be used.
PRE-INSTALLATION CLEANING
NOTICE:
New pumps contain residual test fluid and rust inhibitor.
If necessary, flush pump prior to use.
Foreign matter entering the pump WILL cause extensive
damage. The supply tank and intake piping MUST be cleaned
and flushed prior to pump installation and operation.
LOCATION AND PIPING
Pump life and performance can be significantly reduced when
installed in an improperly designed system. Before starting the
layout and installation of the piping system, review the
following suggestions:
1. Locate the pump as near as possible to the source of
supply to avoid excessive inlet pipe friction.
2. The inlet line must be at least as large as the intake port
on the pump. Slope the piping downward to the pump,
without any upward loops. Eliminate restrictions such as
sharp bends; globe valves, unnecessary elbows, and
undersized strainers.
3. Install a system bypass valve that returns excess flow to
the supply tank or pump inlet piping as appropriate for the
pumping system. Insure that the bypass valve pressure
setting is appropriate for the pump and system component
working pressures.
4. It is recommended a strainer be installed in the inlet line to
protect the pump from foreign matter. Locate the strainer
at least 24" (0.6m) from the pump, and have a net open
area of at least four times the area of the intake piping.
Strainers must be cleaned regularly to avoid pump
starvation.
5. The intake system must be free of air leaks.
6. Expansion joints, placed at least 36" (0.9m) from the
pump, will compensate for expansion and contraction of
the pipes. Contact the flexible connector/hose
manufacturer for required maintenance/care and design
assistance in their use.
7. Install pressure gauges in the NPT ports provided in the
pump casing to check pump at start up.
7. ALL piping and fittings MUST be properly supported to
prevent any piping loads from being placed on the pump.
8. Check alignment of pipes to pump to avoid strains which
might later cause misalignment. See Figure 1. Unbolt
flanges or break union joints. Pipes should not spring
away or drop down. After pump has been in operation for
a week or two, completely recheck alignment.
Figure 1
9. When pumping liquids at elevated temperature, make
provisions to compensate for expansion and contraction of
the pipes, especially when long pipe lines are necessary.
Steel pipe expands approximately 3/4” (1.9 cm) per 100
feet (30.49 m) per 100°F (37.8°C) rise in temperature.