Nortec HP Series - Manual (Page 12)

9 | HP Series Installation Manual
Reinforced Flexible Hose
The HP pump module features a modern high precision pump. Despite this some degree of
vibration is unavoidable when the system is operating. Vibration effects can be further
amplified by long lengths of solid piping and can be transmitted over distances. To avoid this
reinforced flexible hose is recommended between the pump outlet and the feed piping, as well
as between the feed piping and the valve block. The lengths of reinforce flexible hose used at
these points should be at least 2ft (61 cm). This will dampen vibrations transmitted from the
pump and air-handler / ducting.
Reinforced flexible hose should be selected to withstand pressures of 1200 psi or greater to
provide a safety factor for any water hammer effects or pump over-pressurization.
Care must be taken when using reinforced flexible hose. It must not be allowed to sag unduly,
vibrate excessively, be bent around a radius of less than 2” (50 mm), or come into contact with
sharp edges. Always leave some extra line when going around corners and making bends.
Avoid twisting and kinking the lines while un-spooling and installing. When supporting the hose,
keep in mind that thermoplastic hose has a tendency to return to position it was supplied in.
Pipe Supports and Fasteners
The installer must also supply support for feed piping. When selecting brackets, pipe strapping,
and various other supports, ensure that local and national plumbing codes are followed. The
use of heavy-duty vibration control clamps is strongly recommended. For long runs, ensure that
there is no more than 5 feet between supports.
Various fasteners may be required to complete the installation of the HP HVAC system. These
should be sized to adequately support any anticipated loads. Follow local codes for installing
pipe hangers and bolts.
Recommended supports: Stauff® Cushion Clamps or equivalent
Primary Wiring for Pump Module
Appropriate primary wiring is required for connection to the pumps. Refer to the specification
labels on the pump and valve controllers for voltages and currents. Follow local and national
codes for wiring.
Vibration Isolation
The pump skid will generate some degree of vibrations by its nature. It is recommended that
the pump skid be installed on a vibration-damping mat or vibration isolators to reduce
vibrations and noise.