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European Refrigeration Controls Catalogue

Catalog Section

Product Bulletin

P20

Issue

9708

Catalogue Section 6

Order No. PD-P20-E

PSC9734

ntroduction

The P20 series high and low limit (cut-out)

controls for all non-corrosive refrigerants are

compact pressure controls ideally suited for

commercial or residential packaged air

conditioning units, heat pumps, small water

chillers, ice cube machines and other

applications where a semi fixed setting is

acceptable or required and where mounting

space is limited. The P20 series includes auto

reset as well as manual reset models and is

factory set. A special setting tool is available

while also field (screwdriver) adjustable models

can be chosen.

P20 Pressure Control

Feature and Benefits



Field proven reliability.

More than half a million in use today.



Reset tab must be released

before restart.

(Trip free manual reset).

Override of control function is not possible.



Compact design.

Less cabinet space needed.



Enclosed dust-tight switch.

Prevents contacts pollution.



SPDT contact with special

terminals.

Can be used either as quick or as screw

terminals.



Test pressure 53 bar.

Test strength far above severe operating and

standby conditions.



Designed for at least 300000

cycles.

Accurate repeatability and long life.

Series P20

Pressure Controls for Refrigeration, Air-conditioning and Heat-pump Applications

Summary of content (8 pages)

PAGE 1
European Refrigeration Controls Catalogue Catalog Section 6 Product Bulletin P20 Issue 9708 PSC9734 Series P20 Pressure Controls for Refrigeration, Air-conditioning and Heat-pump Applications Introduction The P20 series high and low limit (cut-out) controls for all non-corrosive refrigerants are compact pressure controls ideally suited for commercial or residential packaged air conditioning units, heat pumps, small water chillers, ice cube machines and other applications where a semi fixed setting is acc
PAGE 2
P20 Issue 9708 2 Note These controls are designed for use only as operating controls. Where an operating control failure would result in personal injury or loss of property it is the responsibility of the installer to add devices or systems that protect against, or warn of, control failure. D escription The P20 series are available in three categories (see type number selection table) : 1) Universal replacement models.
PAGE 3
P20 Issue 9708 3 Type number selection In the model number the following information is given: 9650K P20EA- E = Auto reset F = Manual reset low pressure types G = Manual reset high pressure types A = Basic models (only adjustable with special wrench) B = Universal replacement models ( field (screwdriver) adjustable types) Pressure connection style (see page 6) 1 = style 45A 5 = style 50, 51 or customer special 6 = style 13 9 = style 34 Pressure differential.
PAGE 4
P20 Issue 9708 4 Differential specification matrix for LP models, values in bar. Low switch point Differential code AL (1) 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 0.9 1.0 1.0 1.0 1.0 1.0 1.0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 6.5 7 7.5 8 BL (2) 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.5 1.6 1.6 1.6 1.6 1.6 1.6 CL (3) 2.0 2.0 2.0 2.1 2.1 2.1 2.1 2.1 2.1 2.1 2.2 2.2 2.2 2.2 2.2 X Model suffix DL (4) 2.6 2.6 2.7 2.7 2.8 2.8 2.8 2.9 2.9 3.0 3.0 3.0 3.1 3.
PAGE 5
P20 Issue 9708 5 Type number selection table Universal replacement models Range(*) (bar) Differential code Pressure connector Contact function Factory set at 0.5 - 10 0.5 - 10 7 - 29 7 - 29 0.5 - 10 0.5 - 10 7 - 29 7 - 29 CL CL CM CM man. reset (1) man. reset (1) man. reset (2) man. reset (2) style 50 style 13 style 51 style 13 style 50 style 13 style 50 style 13 Fig. 1 Fig. 1 Fig. 2 Fig. 2 Fig. 1 Fig. 1 Fig. 2 Fig. 2 3 bar 3 bar 28 bar 28 bar 3 bar 3 bar 28 bar 28 bar Max.
PAGE 6
P20 Issue 9708 6 Repair and replacement Repair is not possible. In case of an improperly functioning control, please check with your nearest supplier. When contacting the supplier for a replacement you should state the type/model number of the control. This number can be found on the data plate Pressure connections 1 2a 2 1 Fig. 3 Fig. 4 Style 34 Style 45A (incl. valve depressor mounted into capillary flare section) 1 2 1 2 1 2 3 Fig. 5 Fig.
PAGE 7
P20 Issue 9708 7 83 25 12.5 20 1 2 2 42 17.5 38 42 6 9 1 13 12.5 74.5 25.5 12.5 24 68 60 25.5 3 4 3 17.5 60 17.5 Fig. 11 Mounting bracket 210-25R (single) 14 17.5 Fig. 12 Mounting bracket BKT275-1 (dual) 1 Mounting holes Ø 4 mm 2 Extruded holes 8 - 32 UNC thread 3 Mounting holes for P20 Ø 4 mm Dimensions (mm) 1 2 3 19 29 30 67 85 26 6.5 6 22 5 37 19 4 17.5 56 1 Reset lever, for manual reset models only 2 Height of control if 210-604R is used.
PAGE 8
P20 Issue 9708 8 Specifications Type number Operating range Pressure connections Switch points and differentials Adjustment See type number selection table (page 5) LP models 0.5 - 10 bar HP models 7 - 29 bar 90 cm capillary, styles 13, 34, 45A,50 and 51 See “Differential specification” matrices (page 4) Wrench or screwdriver adjustment Maximum ambient temp. +60 °C Minimum ambient temp. -35°C Ambient humidity Test pressure Minimum burst pressure 10 to 95% RH (non-condensing) 53 bar max.