Johnson Controls Serie Instrucciones De Instalación página 5

Mounting
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.
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 3.
P70, P72, and P170 Series Controls for Dual Pressure Applications Installation Instructions
• Use the two inner holes with the Universal
Mounting Bracket (and screws supplied) when
mounting the control to a flat horizontal
surface. See Figure 3.
Figure 3: Mounting Dual Pressure Controls with
NEMA 1 Enclosures
• Mount controls with NEMA 3R enclosures in a
level, upright position with the bellows and conduit
connection facing down. Ensure that all gaskets
are in place. Mounting controls with NEMA 3R
enclosures in any position other than upright and
level may trap water in the enclosure and
submerge internal components.
Wiring
WARNING: Risk of Electric Shock.
Disconnect or isolate all power supplies
!
before making electrical connections.
More than one disconnect or isolation
may be required to completely
de-energize equipment. Contact with
components carrying hazardous voltage
can cause electric shock and may result
in severe personal injury or death.
IMPORTANT: Use copper conductors only. Make
all wiring connections in accordance with local,
national, and regional regulations. Do not exceed
the P70, P72, or P170 Pressure Control electrical
ratings.
IMPORTANT: Use terminal screws furnished in the
switch block. Using other terminal screws will void
the warranty and may damage the switch.
P70, P72, and P170 controls for dual pressure
applications are available with several switch options
and electrical ratings. Check the label inside the control
cover for model number, switch action, and electrical
rating. Check the wiring terminal designations on the
control switch block, and see the following guidelines
and applicable wiring diagrams, when wiring the
control. See Table 1 through Table 3 for switch actions
and models. See Technical Specifications.
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