Specification Sheet

ManualsBrandsJohnson Controls ManualsHVAC Replacement Parts1/8" 0-100 PSI Pressure Transducer

Table Of Contents

Refer to the QuickLIT website for the most up-to-date version of this document.

P499 Series Electronic Pressure Transducers Product/Technical Bulletin

The P499 Series Electronic Pressure Transducers are

compact, economical, rugged, direct-mount pressure

transducers designed for use in commercial

refrigeration and air conditioning applications. These

transducers produce an analog signal based on the

sensed pressure.

The P499 Series transducers feature environmentally

protected electronics with stainless steel construction.

The digitally compensated P499 transducers are highly

accurate over a broad temperature range, resisting the

effects of wide ambient temperature swings, high

humidity, condensation, and icing.

The pressure port is machined from a solid piece of

17-4PH stainless steel. No O-rings, organic materials,

or welds are exposed to the pressure media, allowing

for a leak-proof, all-metal, sealed pressure system.

The P499 transducers operate with any corrosive or

non-corrosive pressure medium that is compatible with

17-4PH stainless steel, including water, condensate,

carbon dioxide, glycol, most refrigerants, including

ammonia, and many other compatible fluids and gases.

The P499 Series provides transducers in a variety of

pressure ranges, covering most common refrigeration

and air conditioning applications.

Figure 1: P499 Electronic Pressure Transducers;

Style 47 fitting shown on the left

and Style 49 fitting shown on the right

Table 1: Features and benefits

Features Benefits

Single-piece machined 17-4PH stainless steel

pressure port

Provides a durable assembly that eliminates refrigerant loss due to

O-ring or weld failures; resists damage due to physical shock, vibration,

and pressure pulsations; enables use with non-corrosive or corrosive

pressure media that is compatible with 17-4PH stainless steel.

Environmentally-protected electronics Withstand the effects of adverse conditions associated with typical

HVAC and refrigeration applications, including freeze/thaw

applications on suction lines.

Reliable, repeatable performance and long

operating life

Minimizes service and replacement costs.

Many available pressure ranges Provide a single line of transducers for all refrigeration and

air conditioning application needs.

Slender body design Facilitates use of deep-socket wrenches for ease of installation;

requires zero turning radius.

1% total error band Provides high-accuracy performance.

CE and UL agency listings Allow for global applications.

P499 Series Electronic Pressure Transducers

Product/Technical Bulletin

P499xxx-x

Code No. LIT-12011190

Part No. 24-7664-2659, Rev. G

Issued October 2018

Summary of content (10 pages)

PAGE 1
P499 Series Electronic Pressure Transducers Product/Technical Bulletin P499xxx-x Code No. LIT-12011190 Part No. 24-7664-2659, Rev. G Issued October 2018 Refer to the QuickLIT website for the most up-to-date version of this document. The P499 Series Electronic Pressure Transducers are compact, economical, rugged, direct-mount pressure transducers designed for use in commercial refrigeration and air conditioning applications. These transducers produce an analog signal based on the sensed pressure.
PAGE 2
Application Typical applications include: IMPORTANT: The P499 Series Electronic Pressure Transducer is intended to provide an input to equipment under normal operating conditions. Where failure or malfunction of the electronic pressure transducer could lead to personal injury or property damage to the controlled equipment or other property, additional precautions must be designed into the control system.
PAGE 3
Installation 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. 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.
PAGE 4
Wiring in hazardous locations Figure 4 shows the wire designations for a P499 transducer used in 4 mA to 20 mA applications. • P499 Series Pressure Transducer models do not have provisions for field wiring. They are suitable for factory installation only. P499 transducers must be installed in a suitable enclosure.
PAGE 5
Checking transducer operation 5. Using your multimeter, measure the DC voltage between the transducer Output (white) wire and Common (black) wire. (See Figure 3.) This is the measured output voltage. IMPORTANT: The P499 transducer is a precision sensing device and testing accuracy is typically beyond the capability of field diagnostic tools. 6. Compare the calculated output voltage (Step 4) and the measured output voltage (Step 5).
PAGE 6
4 mA to 20 mA versions 5. Compare the calculated output current (Step 3) to the measured output current (Step 4). If the current from measured output current differs greatly from the calculated output current, replace the transducer. To verify that the transducer is working properly: 1. With the transducer in place and the controlled system pressure stabilized, measure the pressure at the transducer with an accurate and reliable gauge. This is the measured pressure (P).
PAGE 7
Transducer Base Number P499 Output Signal A 4 to 20 mA B 0 to 5 VDC C 1 to 5 VDC R 0.5 to 4.5 VDC Ratiometric V 0 to 10 VDC Pressure Range 100 -10 to 100 psi 101 0 to 100 psi 102 0 to 200 psi 105 0 to 500 psi 107 0 to 750 psi Packaging C Individual D Bulk K Kit: transducer, cable, and literature Pressure Mode - Gauge A Absolute (0.75% Accuracy) S Sealed Gauge (0.75% Accuracy) Pressure Connection A 1/8 in. 27 NPT External Thread (Style 49) B 1/4 in. SAE 45o Flare External Thread o C 1/4 in.
PAGE 8
1. The Individual pack comes with a transducer only - you must order the wire harness separately (see Table 2). The Kit is packaged with a transducer, 6-1/2 ft (2 m) wire harness, and technical documentation. Table 4: 0.5 VDC to 4.5 VDC ratiometric P499 transducer models with Packard electrical connections, PSIS Product code number Pressure connection P499RAPS100C 1/8 in.
PAGE 9
Table 6: 0 VDC to 10 VDC P499 transducer models with Packard electrical connections, PSIG (Part 2 of 2) Product code number Pressure connection P499VCP-101C 1/4 in. SAE 45 Flare Internal Thread (7/16-20 UNF) with Depressor (Style 47) P499VCP-101K Pressure range P499VCP-105C P499VCP-105K P499VCP-107C P499VCP-107K 1. Individual or kit1 Minimum pressure (Pmin) Maximum pressure (Pmax) 0 psig (0 bar) 100 psig (6.9 bar) Individual 0 psig (0 bar) 500 psig (34.
PAGE 10
P499 Series Electronic Pressure Transducers (Part 2 of 2 ) Supply voltage 0.5 VDC to 4.5 VDC ratiometric output 5.0 ±0.25 VDC, Safety Extra-Low Voltage (SELV) or Class 2 4 mA to 20 mA output 9 VDC to 30 VDC, SELV or Class 2 0 VDC to 10 VDC output 12 VDC to 30 VDC, SELV or Class 2 Direct-mount pressure connections 1/8in. -27 NPT External Thread (Style 49), 1/4 in.