C-2220 High-Low Pressure Selector Product Bulletin

Вид документа	Бюлетень виробу
Виробник	JCI
Код документа	c-2220-high-low-pressure-selector-product-bulletin
Група обладнання	C-2220 High-Low Pressure Selector
Сторінок	4
Мова документа	англійська
Розмір файлу	0.2 МБ

Текст документа

24- 1153- 9, Rev. D

Product Bulletin C-2220
Issue Date March 2016

C-2220 High-Low
Pressure Selector

The C-2220 High-Low Pressure in parallel. These
Selector is a pneumatic device interconnections form the high
that selects and transmits the and low signal selector.
highest and lowest control
Through the use of the C-2220,
pressure signals from a group of
heating and cooling apparatus
thermostats or controllers. The
are controlled by the zones with
selector is available in master
the greatest demand. Heating
and subordinate modules for use
cool air or cooling heated air,
with high volume output and low
which may occur in dual duct
volume output thermostats or
and multizone systems, is
controllers.
minimized.
One master and as many as
19 subordinates can be Mounting
combined in a single selector for Fig. 1: C-2220 High-Low
up to 20 zones of high-low Master C-2220 modules are Pressure Selector
pressure selection. A furnished with two vinyl plugs
combination of high and low and two small round head
volume output modules can also screws. The vinyl plugs are
be used in the same selector for used with the small screws to
applications involving both high
and low volume output
thermostats. Note: For non- Specifications
relay assemblies consisting of
more than 10 modules, an
A-4000-135 filter must be
used in place of the
C-2220-601 filter because of its
higher flow capacity. In all
cases, the appropriate C-2220
module must be chosen for
proper operation with the
corresponding type of thermostat
or controller. Low volume C-
2220 modules are furnished with
integral restrictors to provide
restricted supply air pressure to
their respective thermostats.

Operation
Figure 2 shows an internal view
of a three-zone selector for a low
volume output application. Each
C-2220 module contains a high
and a low signal repeater. When
the modules are coupled
together to form the selector, the
high signal repeaters are
connected in series and the low
signal repeaters are connected

© 2016 Johnson Controls, Inc. 1
Part No. 24-1153-9, Rev. D
Code No. LIT-7171420
block off the “S” and “L” tightly. Once two Operational Checkout
receptacles of the last modules have been
subordinate module. locked together, they Note the input pressures from
should only be uncoupled each of the controllers or
All C-2220 modules are thermostats. Check the high and
furnished with two holes for for troubleshooting or
replacement. low output pressures to see that
mounting with #6 sheet metal they match the highest and
screws. A short length of 3. After the last subordinate is lowest input pressures.
5/32 in. O.D. tubing with a 5/32 connected, the “L” and “S”
to 1/4 in. in-line coupler is also receptacles must be
furnished for existing Repair Information
plugged (see Fig. 3). The
applications using 1/4 in. tubing. “H” receptacle is not If the C-2220 fails to operate
To mount the selector, it is only plugged and must be open within its specifications,
necessary to secure every other to atmosphere. Insert the individual modules can be
module and the master and last small vinyl plugs into the replaced. Work the modules
subordinate module. The C- receptacles and push them apart gradually; do not pull them
2220-5 Mounting Base Kit all the way in with a small straight apart or use a
(ordered separately) is available probe such as a paper clip. screwdriver to pry them apart as
for mounting the selector to a this may damage the receptacles
4. Insert the small round head
rough surface. The mounting and fittings. Replacement filters
screws into the vinyl plugs
base can accommodate up to six are also available. Refer to the
and tighten them until the
modules and contains eight #6 Repair Parts table for
heads just touch the C-2220
sheet metal screws. This kit is appropriate code numbers.
body. Note: Overtightening
not required for panel mounted the screws will loosen the
selectors. vinyl plugs and result in Application and Drawing
air leakage. Identification
Installation 5. If the system is expanded at
1. Check that each C-2220 a later date, unscrew the
module is appropriately small round head screws in
matched with its high or low the last subordinate module
volume output controller or part way to loosen the
thermostat. plugs. Remove the plug
and screw from both
2. Insert the three barbed receptacles and add the
fittings on the top of the first additional subordinates
subordinate module into the required. Replace the plugs
corresponding receptacles in the last subordinate
on the bottom of the master module as per steps 3 and
module. Similarly attach the 4.
succeeding subordinate
modules together in the
same manner. Note: The
modules will lock and seal

2 C-2220 Product Bulletin
C-2220 Product Bulletin 3
European Single Point of Contact: NA/SA Single Point of Contact: APAC Single Point of Contact:
JOHNSON CONTROLS JOHNSON CONTROLS JOHNSON CONTROLS
WESTENDHOF 3 507 E MICHIGAN ST C/O CONTROLS PRODUCT
45143 ESSEN MILWAUKEE WI 53202 MANAGEMENT
GERMANY USA NO. 22 BLOCK D NEW DISTRICT
WUXI JIANGSU PROVINCE 214142
CHINA

Controls Group
507 E. Michigan Street
P.O. Box 423 Printed in U.S.A.
Milwaukee, WI 53202

4 C-2220 Product Bulletin

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