Specification Sheet

P499 Series Electronic Pressure Transducers Product/Technical Bulletin
3
Installation
See Mounting and Wiring for information about
installing the P499 Series Electronic Pressure
Transducers.
Parts required
P499 transducers require wire harnesses for all models
that do not have an integral cable. Use Table 2 to
select a wire harness.
Mounting
The P499 transducer mounts directly to most
refrigeration equipment pressure tap ports.
To mount the P499 transducer:
1. Hand thread the P499 transducer to the pressure
tap point.
2. Tighten the connection using the wrench flats
provided to avoid damaging the transducer.
3. Perform a leak test on fittings and connections
before putting the system into operation.
Wiring
Follow the wiring guidelines given to avoid causing
damage to the P499 transducer and improper
equipment operation:
• Ensure wiring conforms to the National Electrical
Code and local regulations.
• Do not apply more than the maximum supply
voltage to the transducer. See Technical
specifications.
• Do not extend the wiring harness leads more than
250 ft (76 m). Use 22 AWG, 3-wire, shielded cable
to extend wiring harness leads.
• Do not run low-voltage cable in conduit or wiring
troughs with high-voltage wires.
• Ensure that the shielded cable is terminated
according to code and the control’s instructions.
Table 2: Wire harnesses with Packard connectors
Product code number
1
1. Wire harnesses for P399 transducers and
P499 transducers are interchangeable.
Length
WHA-PKD3-200C 6 1/2 ft (2.0 m)
WHA-PKD3-400C 13 ft (4.0 m)
WHA-PKD3-600C 19 5/8 ft (6.0 m)
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.
Risque de dégâts matériels.
Installer le régulateur de pression séparément de
l'armoire électrique et étanchéifier tous les conduits
électriques afin d'éviter que de l'ammoniac n'entre en
contact avec des composants électriques. En cas
d'exposition potentielle à de l'ammoniac, utiliser
uniquement des modules de régulation et des raccords
de pression compatibles avec la présence d'ammoniac.-
L'arrêt du système en raison d'un réglage inapproprié
risque de provoquer des dégâts matériels.
IMPORTANT: When installing the
P499 transducers, observe all regulations governing
the handling and containment of hazardous or
regulated materials (refrigerants or lubricants).
IMPORTANT: Locate pressure tap points on the
top side of the refrigerant lines to reduce risk of
equipment damage or malfunction caused by
accumulation of oil, liquids, or sediment in the
pressure chamber.
IMPORTANT: Avoid severe pressure pulsations on
high-side pressure connections by positioning the
transducer away from compressor discharge.
Risk of Electric Shock.
Disconnect the power supply before making electrical
connections to avoid electric shock.
Risque de décharge électrique.
Débrancher l'alimentation avant de réaliser tout
raccordement électrique afin d'éviter tout risque de
décharge électrique.