P70, P72, and P170 Series Controls for Low Pressure Applications Installation Instructions
3
Installation
Dimensions
See Figure 1 and Figure 2 for dimensional information.
These dimensions are nominal and are subject to
accepted manufacturing tolerances and application
variables.
Mounting
Observe the following guidelines when installing this
device:
•
Mount the control in an accessible position, where
the control and pressure-connection lines are not
subject to damage.
•
Mount the pressure control upright and level.
•
Position the pressure-connection lines to allow
drainage away from control bellows.
•
Locate pressure-tap points on the topside of the
refrigerant lines to reduce the possibility of oil,
liquids, or sediment accumulating in the bellows,
which could cause control malfunction.
•
Mount controls with NEMA 1 enclosures on
horizontal or vertical flat surfaces.
•
Use two screws or bolts through the two outer
holes on the back of the control case when
mounting the control directly to a flat vertical
surface. See
Figure 1: Dimensions of P70, P72, and P170
Pressure Controls with NEMA 1 Enclosures,
in. (mm)
Figure 2: Dimensions of P70, P72, and P170
Pressure Controls with NEMA 3R Enclosures,
in. (mm)
!
CAUTION: Risk of Property Damage.
Mount the pressure control separately
from the electrical cabinet and seal all
electrical piping to prevent ammonia from
migrating to electrical components.
Where there may be exposure to
ammonia, use only ammonia-compatible
control modules and pressure
connections. System shutdown due to
improper adjustment may cause property
damage.
!
CAUTION: Risk of Property Damage.
Mount the P70, P72, or P170 Pressure
Control according to the instructions and
guidelines included with the control.
These instructions and guidelines are
intended to reduce the risk of malfunction
of the product and resulting property
damage. Failure to follow these
instructions and guidelines could cause
the control to malfunction, resulting in
property damage.
IMPORTANT:
Use only the mounting screws
supplied with the Universal Mounting Bracket to
avoid damaging internal components. Be careful not
to distort or bend the control case when mounting
the control to an uneven surface. Using other
screws or bending the control case will void the
warranty.
