Product Overview

P20
Issue 9708
Catalogue Section 6
© 1997 Johnson Controls Inc.
Order No. PD-P20-E
2
N
ote
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.
These are
field (screwdriver) adjustable, individually
packed and can be purchased in any
quantity.
2) Basic models.
These are factory set but can
be adjusted by use of a special wrench (see
accessories). They can be purchased in
bulkpack of 50 pcs each.
3) Special (OEM) models.
For yearly order
quantities above 1000 pcs these models can
have optional constructions like:
- screwdriver adjustment
- 120 cm capillary
- range -0.6 to 7 bar
- range 14 to 42 bar
- other pressure connection style
The minimum shipping quantity from factory is
250 pieces per model ( 10 boxes). Please
contact your Johnson Controls representative.
I
nstallation
The P20 controls can be installed in any
convenient location provided that the ambient
conditions are suitable for the IP00 enclosure,
within the specified limits regarding temperature
and humidity and normal pollution situation.
Each control is provided with 2 mounting
screws (6-32UNC x 4.5 mm
thread). For easy
mounting different types of mounting brackets
are available (see accessories).
A
djustment
All models are factory set. The universal
replacement models can be field adjusted by
use of a screwdriver. For adjustment of the
basic models a special wrench is needed (see
accessories). The differential is not adjustable
but can be selected from the “ Differential
Specifications” matrices (see page 4 ).
R
ange
The indicated range means from the “minimal
low switchpoint” up to the maximum “ high
switch point”. This means that the “differential”
cannot be at the outside of the indicated range.
C
ontact functions
L
ow
P
ressure version
1
3
2
1 - 2 open on pressure decrease
Fig.1
H
igh
P
ressure version
1
3
2
1 - 2 open on pressure increase
Fig. 2
A
ccessories
(see page 6 and 7).
The following accessories are available:
- Adjusting wrench WRN12-1 for adjustment of
all models. (Fig. 8)
- Clip-on terminal cover. (Fig. 9)
- Mounting plate BKT116-1 for single P20.
(Fig. 10)
- Mounting bracket 210-25R for single P20,
angled version. (Fig. 11)
- Mounting bracket BKT275-1 for two P20
controls, angled version. (Fig. 12)