Compu-aire SYSTEM 2200 Plus 3L User manual

Rev.03C 02-19-14
Page 1 of 82
Compu-Aire
SYSTEM 2200+3L
PROGRAMMABLE CONTROLLER
-USER MANUAL-
8167 Byron Road Whittier, CA 90606
Phone: [phone] Fax: [phone]
SUBJECT TO CHANGE WITHOUT INCURRING OBLIGATION

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Table of Contents
1.0 INTRODUCTION..................................................................................................................................... 8
2.0 QUICK REFERENCE GUIDE ..................................................................................................................... 8
3.0 SEQUENCE OF OPERATIONS ................................................................................................................. 9
3.1 Standard Units in General............................................................................................................. 9
3.2 How to Turn the Unit ON .............................................................................................................. 9
3.3 Lead/Lag Redundancy –p-LAN Network ...................................................................................... 9
3.4 Air Cooled DX With Chilled Water Plus....................................................................................... 10
3.5 Air Side Economizer ....................................................................................................................11
3.6 Water Side Economizer Energy miser (EM) Unit Using 2-Way Valves........................................ 11
3.7 Water Cooled Energy Miser........................................................................................................ 13
3.8 Dry Fluid Cooler With Energymizer.............................................................................................14
3.9 Special Pump and Dry Fluid Cooler control logic ........................................................................ 16
3.10 Optional features ........................................................................................................................16
4.0 CONFIGURATION.................................................................................................................................17
4.1 Main menu..................................................................................................................................17
4.2 Screen Settings............................................................................................................................ 18
4.3 Network Configuration ...............................................................................................................19
4.4 Network Monitor ........................................................................................................................ 19
4.5 Assigning Private and Shared terminals...................................................................................... 20
4.6 P-LAN Setup ................................................................................................................................ 21
4.6.1 Master Unit (ID=1) .............................................................................................................. 21
4.6.2 Slave Unit (ID=2)..................................................................................................................21
4.6.3 P-LAN WIRING ..................................................................................................................... 22
4.7 General Options ..........................................................................................................................23
5.0 TECHNICAL SPECIFICATIONS ...............................................................................................................24
5.1 Controller and Display................................................................................................................. 24
5.2 General Characteristics ...............................................................................................................24
5.3 Mechanical Characteristics ......................................................................................................... 25
5.4 Electrical Characteristics .............................................................................................................26

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5.5 Digital Inputs ...............................................................................................................................26
5.6 Analog inputs .............................................................................................................................. 26
5.7 Analog Outputs ........................................................................................................................... 27
5.8 Digital Outputs ............................................................................................................................27
5.9 P-LAN Network Terminal ............................................................................................................27
5.10 Cable Length ............................................................................................................................... 27
5.11 Standard Input / Outputs............................................................................................................28
5.12 Optional Features .......................................................................................................................29
5.13 Functional characteristics ...........................................................................................................29
5.14 Building Management System ....................................................................................................29
6.0 CONTROLLER INTERFACE .................................................................................................................... 30
6.1 LED Indicators .............................................................................................................................30
6.2 Navigation Buttons ..................................................................................................................... 30
7.0 Navigation Menu.................................................................................................................................30
7.1 Menu Tree................................................................................................................................... 31
7.2 Accessing Submenus...................................................................................................................32
7.3 Main Menu Selection.................................................................................................................. 32
7.4 Unit Status................................................................................................................................... 32
7.5 Trending ......................................................................................................................................34
7.5.1 Graph Overviews.................................................................................................................34
7.5.2 Icon Description and function.............................................................................................35
7.6 Alarms ......................................................................................................................................... 37
7.6.1 Alarm Viewing and Function ...............................................................................................37
7.6.2 Alarm Reset......................................................................................................................... 37
8.0 SETUP MENU....................................................................................................................................... 38
8.1 Entering a password....................................................................................................................38
8.2 Setup Menu Tree ........................................................................................................................ 39
8.3 Setpoints ..................................................................................................................................... 40
8.3.1 Changing Setpoints .............................................................................................................40
8.3.2 Changing Alarm Setpoints...................................................................................................41
8.4 Clock Setup.................................................................................................................................. 41

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8.4.1 Time and Date Setup........................................................................................................... 41
8.4.2 Night Setback ...................................................................................................................... 41
9.0 RUN TIME HOUR METERS ................................................................................................................... 42
10.0 BUILDING MANAGEMENT SYSTEM (BMS) ..........................................................................................43
10.1 Modbus ....................................................................................................................................... 43
10.1.1 Mounting............................................................................................................................. 43
10.2 POINTLIST.................................................................................................................................... 46
10.3 LONWORKS .................................................................................................................................48
10.3.1 General characteristics ....................................................................................................... 48
10.3.2 Physical channels ................................................................................................................ 48
10.3.3 Physical Circuit Board Layout.............................................................................................. 48
10.3.4 LED Color Description ......................................................................................................... 49
10.3.5 Installation .......................................................................................................................... 49
10.3.6 Connection to the PCO3 Controller ....................................................................................50
10.3.7 Connection to the LonWorks® network.............................................................................. 50
10.3.8 Service pin...........................................................................................................................50
10.3.9 WINK event .........................................................................................................................51
10.4 BACNET OVER TCP/IP..................................................................................................................52
10.4.1 Installation .......................................................................................................................... 52
10.4.2 Functions.............................................................................................................................52
10.4.3 Default parameters .............................................................................................................52
10.4.4 Restarting the software ......................................................................................................53
10.4.5 Configuration ......................................................................................................................53
10.4.6 Web server.......................................................................................................................... 55
10.4.7 Accessing the operating system by authentication ............................................................55
10.4.8 CGI script............................................................................................................................. 56
10.4.9 SNMP...................................................................................................................................56
10.4.10 BACnet.............................................................................................................................56
10.4.11 WARNINGS ......................................................................................................................56
10.5 BANET over MS/TP...................................................................................................................... 57
10.5.1 Installation .......................................................................................................................... 57

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10.5.2 Meaning of the jumpers...................................................................................................... 58
10.5.3 Operation ............................................................................................................................58
10.5.4 Recalling the factory configuration (“factory bootswitch” mode) ..................................... 60
10.5.5 Configuration ......................................................................................................................60
10.5.6 BACNET Parameter Description ..........................................................................................61
11.0 TECHNICIAN MENU ............................................................................................................................. 62
11.1 Alarm Setup.................................................................................................................................62
11.1.1 Available Alarms..................................................................................................................64
11.1.2 Sensor Offset....................................................................................................................... 66
11.1.3 Digital Input.........................................................................................................................66
11.2 Network Setup ............................................................................................................................ 67
11.2.1 Define a Network ................................................................................................................ 67
11.2.2 Network Assist .................................................................................................................... 67
11.3 Manual Control ...........................................................................................................................68
12.0 FACTORY SETTING............................................................................................................................... 69
12.1 Factory Setting Menu Tree .........................................................................................................69
12.1.1 Digital Inputs and Digital Outputs....................................................................................... 70
12.1.2 HVAC ...................................................................................................................................72
12.1.3 Analog Inputs and Analog Outputs ..................................................................................... 75
12.1.4 Changing Passwords............................................................................................................77
12.2 Factory Reset ..............................................................................................................................77
13.0 TROUBLESHOOTING GUIDE ................................................................................................................78

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Table of Figures
Figure 1–Configurations screen ................................................................................................................. 17
Figure 2 - Screen calibration .......................................................................................................................18
Figure 3–Changing unit ID...........................................................................................................................20
Figure 4 - Touch sensitive graphical display............................................................................................... 24
Figure 5 –Controller ................................................................................................................................... 24
Figure 6 - Internal built in display ...............................................................................................................24
Figure 7 –Graphical user interface............................................................................................................. 30
Figure 8 - Main Menu.................................................................................................................................. 31
Figure 9 - Unit general status......................................................................... Error! Bookmark not defined.
Figure 10 - Room demand icons .................................................................... Error! Bookmark not defined.
Figure 11- Graphical sensors representation.............................................................................................. 34
Figure 12 - Graph description .....................................................................................................................34
Figure 13 - Pressure graph ..........................................................................................................................34
Figure 14–Alarm History ............................................................................... Error! Bookmark not defined.
Figure 15–Password prompt.......................................................................................................................38
Figure 16 - Entering a password .................................................................................................................39
Figure 17 - Setup menu............................................................................................................................... 39
Figure 18 - Setup Menu Tree ...................................................................................................................... 39
Figure 19 - Room temperature setpoints ...................................................................................................40
Figure 20 - Room humidity setpoints..........................................................................................................40
Figure 21 - Clock setup................................................................................................................................41
Figure 22 - Component run time meters .................................................................................................... 42
Figure 23 - Building management system...................................................................................................43
Figure 24 - Communication protocol .......................................................................................................... 43
Figure 25 - LONTalk Card ............................................................................................................................48
Figure 26 - Remove plastic cover ................................................................................................................ 50
Figure 27- Cut out window ......................................................................................................................... 50
Figure 28 - Installing plugin card................................................................................................................. 50
Figure 29 - Replacing windows cover..........................................................................................................50
Figure 30 - PCOWeb....................................................................................................................................54
Figure 31 - Window cover........................................................................................................................... 54
Figure 32 - Installing PCOWeb .................................................................................................................... 54
Figure 33 - Installing plastic cover............................................................................................................... 54
Figure 34 - Alarm configuration ..................................................................................................................62
Figure 35 - Alarm delays..............................................................................................................................64
Figure 36 -Alarm switch over ...................................................................................................................... 64
Figure 37 - Network Setup ..........................................................................................................................67
Figure 38 - Network Assist ..........................................................................................................................67
Figure 39 - Factory Setting ..........................................................................................................................69

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Figure 40 - Digital input configuration ........................................................................................................70
Figure 41 - Digital output configuration ..................................................................................................... 71
Figure 42 Fan Setup .................................................................................................................................... 72
Figure 43 Sensor Setup ............................................................................................................................... 72
Figure 44 Compressor Setup.......................................................................................................................72
Figure 45 Compressor Option..................................................................................................................... 72
Figure 46 Compressor Stage ON/OFF ......................................................................................................... 73
Figure 47 Low Pressure Retry .....................................................................................................................73
Figure 48 Humidifier ................................................................................................................................... 73
Figure 49 Humidity Lockout........................................................................................................................73
Figure 50 Heater Setup ............................................................................................................................... 73
Figure 51 Heating Demand .........................................................................................................................73
Figure 52 - Analog input configuration ....................................................................................................... 75
Figure 53 - Analog output configuration..................................................................................................... 76
Figure 54 - Changing default password.......................................................................................................77
Figure 55 - Factory reset / Set Unit Mode .................................................................................................. 77

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1.0 INTRODUCTION
The System 2200+3L is a programmable controller based on a double microprocessor, designed
for precise "Smart" control of an air conditioning system. The System 2200+3L is made up of a
microprocessor based MAIN BOARD equipped with a set of terminals used to interface the
microcontroller board to the controlled devices; such compressors, fans, heaters, humidifiers,
and valves. The program is retained in a flash based memory and configuration parameters are
permanently stored (even in the case of a power failure) in a non-volatile memory.
The System 2200+3L also includes a microprocessor based TERMINAL unit complete with
graphical touch screen display with built in navigation keypad and led indicators allowing the
users to easily set the controlled parameters for set points, dead bands, alarm thresholds, and
carry out the main working operations (on/off, displaying controlled variables, printouts). The
controller and graphical display terminal are powered by 24VAC power supply using low voltage
control transformers from the unit. Connection between the terminal unit and main board is
necessary only when programming the System 2200+3L basic parameters. The controller is
linked to a graphic display terminal via standard three wire cable.
2.0 QUICK REFERENCE GUIDE
The controller is fully programmed and pre-configured per system configuration. Further
tweaking may be required to better fit the application.
For remote mounted controllers, make sure the UNIT ID is matching with the Tag ID
number.

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3.0 SEQUENCE OF OPERATIONS
3.1 Standard Units in General
In general, the controller is operated as follows. Note that the followings are applicable while the
controller is in active mode and only apply to DX and Chilled Water units.
•Fan starts up on demand for cooling, heating, humidifying or dehumidifying, or operates
continuously
•Sequences the compressors on in stages with programmable delays to meet demand for
cooling and dehumidification
•Sequences the heaters on in stages with programmable delays to meet demand for heating
or reheat during dehumidification mode
•Activates the humidifier as needed to meet the humidity demand
•Dehumidification is achieved by means of cooling to reduce the humidity level. During the
dehumidification process, if the temperature falls below the room set point, heating is
brought on to reheat the air and maintain room temperature.
•The controller monitors the complete system for any sensors, fans, compressors, heaters
and humidifier failure. Upon critical failures, the complete system will shut down with
alarm. For certain component failures, the applicable feature is disabled to insure safe
operation. For example, when compressor failure occurs, the failed compressor shall be
locked out but the system shall provide cooling by other compressor if available. On a
heater failure, the heaters are locked out. The system will not use that function until
manually reset on the display. The controller also keeps the history of last 100 alarms after
you reset them.
3.2 How to Turn the Unit ON
Press the Power button ON/OFF key once to turn it ON and press it again to turn it OFF
The System Status screen should indicate the current system operating mode
Default time delay is 30 seconds to avoid short cycling
Unit will automatically control the necessary mode of operation to maintain room setpoints
3.3 Lead/Lag Redundancy –p-LAN Network
System 2200+ series controllers can be set for n+ redundancy setup. A maximum of 16 units can
be linked together on the p-LAN network. The p-LAN networked units are identified with unit ID
numbers. The p-LAN software resides in the unit ID# U01 which is also called as a MASTER unit. All
the other units on that network are considered as SLAVE units. Each controller is self-dependent
with necessary sensors and it can be used as a stand-alone unit. When used on the p-LAN
Network, each unit must have the same software revision and set to maintain the same set points
and safety alarms. The unit U01 must be set for the total units on the network.
When more than one unit are connected through p-LAN network for lead/lag operation, the first
controller, unit ID# U01 is defined as the “Master” and the rest (U02, U03 ….U16) are define as

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“Slave”. The Master always starts first to maintain the temperature and humidity set points. The
Slave is kept on standby as long as the Master is able to achieve the set points within the dead
band. When the Master fails to do so, it calls in the Slave to assist. Then both units will be
running towards the targets set on the Master (set points on the Slave is irrelevant in this
situation). The Slave drops out when set points are achieved. When the Master fails by any of
the selectable failures (such as compressor high/low pressure failure and fire alarm), the Master
drops off and the Slave comes in to work independently according to its own set points until the
Master is recovered. When the system is reset and restarted, the Master comes in first and
follows the above rules.
The units can be set to cycle to achieve equal run time on each unit. At the end of each cycle, the
role of each unit switches to its counterpart, meaning the Master becomes the Slave and the
Slave becomes the Master during the next cycle. During each cycle, the units operate according
to the above lead/lag logic.
3.4 Air Cooled DX With Chilled Water Plus
Summary of Equipment
The primary system shall be Chilled Water Cooling. Direct Expansion Cooling shall be setup as a
back up to the Chilled Water system. Both systems are designed to work independent of each
other.
The Chilled Water System comes standard with a three (3) way water modulating valve, coil, and
an optional “no water flow switch”. The DX system is equipped with a DX coil, compressor(s), and
outdoor air cooled condenser. Optional heaters and humidifiers are also available if needed.
A unique feature of Air Cooled/Chilled Water Plus units is that the chilled water coil is located at
the side of the direct expansion coil. The auxiliary chilled water coil is custom sized so that it
provides identical cooling capacity obtained during the refrigeration cycle with the compressor
operating.
Cooling-Chilled Water
Chilled Water cooling is the primary cooling system for C+ units. For optimum performance, the
controller is programmed to call chilled water cooling for the first 300 seconds regardless of the
chilled water temperature.
The C+ unit can switch over from one cooling mode to another based on sensing Chilled Water
flow or Chilled Water temperature. The standard practice is to sense the Chilled Water flow for
switching.
If “No Water flow”switch is selected, the unit senses the flow of chilled water by using a pressure
differential switch and switches over to DX cooling based on loss of water flow. When no water
flow switch is selected for switch over, the unit will only work on either DX or C.W. cooling mode.

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If chilled water supply temperature is selected for switch over, than the unit shall continue with
chilled water cooling if the chilled water supply temperature is below the required temperature
set point and switch over to the DX cooling.
Cooling-Direct Expansion
Direct Expansion Cooling is designed to operate when the water flow switch senses that there is
no water flow. A digital signal is sent to the system from the controller to modulate the three (3)
way valve to cut water flow to the chilled water coil and the backup system direct expansion
cooling should start. The controller signals the compressor to start cooling. The outdoor
condenser gets energized as needed.
3.5 Air Side Economizer
Summary of Equipment
The Economizer Mixing Box is factory provided; however, it might be installed in the field by
others. Typically, the Air Side Economizer Mixing Box is provided for our Maxi-Kool unit with
System 2200 series controller.
Sequence of Operation
The evaporator fan and a set of dampers for the economizers are energized depending on heating
or cooling demands. The PCO3 controller commands the economizer box to bring either the
minimum amount of outside air or only outside air based on outside air temperature and
humidity. The controller determines whether the outdoor air temperature and humidity is
suitable for “economizer-cooling”. If the outdoor air is suitable, mechanical cooling shall be
locked out by the outdoor enthalpy control. The set of economizer damper actuators shall be
energized, operating the outdoor air and the return air dampers. The economizer damper
actuators shall be regulated to maintain proper discharge air temperature. When outdoor air is
not suitable for “economizer-cooling”, the Economizer shall be locked out and the outdoor air
damper shall maintain minimum position while the indoor fan is operating. Upon unit shutting
down or power loss, the spring return motor actuator shall close the outdoor air damper. The
Economizer shall be automatically locked out during the heat mode (if applicable).
The Air Side Economizer box shall include: prewired modulating spring return damper actuators,
economizer control logic with compressor assist option, minimum outside air damper position
control, economizer control sensors including outdoor air temperature and humidity (enthalpy)
sensor, supply air and/or mixed air sensors. The supply air temperature sensor is used to maintain
the desire supply air temperature using DX and Economizer cooling together. The exhaust of
room air during economizer cooling mode shall be done by others in the field.
3.6 Water Side Economizer Energy miser (EM) Unit Using 2-Way Valves
Summary of Equipment
Energy miser units are provided with Dual Cooling options. DX cooling using Compressor based
system and Economizer cooling using Water Side Economizer Coil.

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The primary system shall be Direct Expansion Cooling. The free cooling Energy miser coil is
provided together with the DX cooling coil. If the Water temperature drops below the Energy
miser set point, the condenser water is diverted to the free cooling coil and DX cooling will be
programmed to either turned off or made available to assist based on demand.
The Energy miser System shall be provided with a Two (2) way water regulating valve for
condenser coil, a Two (2) way modulating chilled water valve for energy miser coil, DX coil(s),
compressor(s) and co-axial water condenser(s). The water valves on water cooled condensers and
free cooling energy miser CW Valves will allow the water flow in either condenser coil or free
cooling EM coil. The two way control valve shall control the amount of flow to auxiliary energy
miser cooling coils to meet the demand when in EM cooling mode. The Two way water regulating
valve will control the amount of water flow in condenser based on the refrigerant pressure in DX
cooling mode. System shall be programmed to do either DX cooling or EM cooling based on
entering water temperature.
Energy miser systems are connected to Cooling Tower or Dry Fluid Coolers to obtain re-circulating
water or water glycol solution. In addition, the system is equipped with steam generating
humidifier, electric reheat and microprocessor based controller.
A unique feature of Energy miser system is that the free cooling water coil is located just before
the direct expansion coil and is properly sized to provide the same cooling capacity as the DX
system at 45 Deg. F entering water temperature. The indoor unit will send a signal to enable and
disable the outdoor auxiliary equipment. The outdoor equipment has its own control logic to
provide water temperature suitable for either EM mode or DX cooling mode.
Cooling-Direct Expansion
Direct Expansion Cooling shall operate when the water temperature increases above the specified
EM set point. A digital signal is sent to the system by microprocessor to signal the compressors
and the two (2) way valves will regulate the water flow into the water cooled condensers based
on the refrigerant pressure. Each compressor system shall have separate 2-Way water regulating
valves. The Energy miser mode depends on the entering water temperature and it is adjustable.
Cooling-Energy miser Mode
The unit can switch over from DX cooling mode to Free cooling Energy miser mode based on the
Entering Water temperature.
Unit shall start in DX cooling mode. If the temperature of water supply drops below the set point
for the Energy miser mode, the unit will switch over to the Energy miser free cooling mode. The
outdoor fluid cooler shall be provided with energy miser control panel to maintain lower fluid
temperature during energy miser mode.
In the free cooling energy miser mode the compressors will remain shut off while the fans of the
unit shall be on. Humidification and Dehumidification modes shall be operating as needed.

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3.7 Water Cooled Energy Miser
Summary of Equipment
Energy miser units are provided with Dual Cooling options. DX cooling using Compressor based
system and Economizer cooling using Water Side Economizer Coil.
The primary system shall be Direct Expansion Cooling. The free cooling Energy miser coil is
provided together with the DX cooling coil. If the Water temperature drops below the Energy
miser set point, the condenser water is diverted to the free cooling coil and DX cooling will be
programmed to either turned off or made available to assist based on demand.
The Energy miser System shall come standard with a three (3) way water regulating valve for
condenser coil, a three (3) way modulating chilled water valve for energy miser coil, DX coil(s),
compressor(s) and co-axial water condenser(s). The water valves on water cooled condensers and
free cooling energy miser CW Valves are Three Way mixing type designed to divert the flow in
either condenser coil or free cooling EM coil. Three (3) way is used to maintain pressure drop, as
constant GPM is required for free cooling systems. The (3) three way control valve shall control
the amount of flow to auxiliary energy miser cooling coils and maintain constant temperature and
relative humidity
Energy miser systems are connected to Cooling Tower or Dry Fluid Coolers to obtain re-circulating
water or water glycol solution. In addition, the system is equipped with steam generating
humidifier, electric reheat and microprocessor based controller.
A unique feature of Energy miser system is that the free cooling water coil is located just before
the direct expansion coil and is properly sized to provide the same cooling capacity as the DX
system at 45°F entering water temperature.
Cooling-Direct Expansion
Direct Expansion Cooling shall operate when the water temperature increases above the specified
set point. A digital signal is sent to the system by microprocessor to signal the three (3) way valve
to divert the water flow from the free cooling coil to the water cooled condensers and the direct
expansion cooling mode shall start. The microprocessor shall signal the compressor to start
cooling and at the same time energize the water regulating valve to supply water flow to the co-
axial condenser. The Energy miser mode depends on the entering water temperature and it is
adjustable.
Note: Continuous water shall be flowing through the chilled water valve and will only supply
water to coil when called upon.
Cooling-Energy miser Mode
The unit can switch over from DX cooling mode to Free cooling Energy miser mode based on the
Entering Water temperature.

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Unit shall start in DX cooling mode. If the temperature of water supply drops below the set point
for the Energy miser mode, the unit will switch over to the Energy miser free cooling mode. The
controller will send signal to the auxiliary equipment to run Energy miser mode for fluid
temperature control. The outdoor fluid cooler shall be provided with energy miser control panel
to maintain lower fluid temperature during energy miser mode.
In the free cooling energy miser mode the compressors may shut off while the fans of the unit
shall be on. Humidification and Dehumidification modes shall be operating as needed. The
Compressors can be locked to remain off during energy miser mode if necessary.
3.8 Dry Fluid Cooler With Energymizer
Summary of Equipment
DRY FLUID COOLER (DFC): The Dry Fluid Cooler Shall Consist of Casing, Coil, Direct-drive Propeller
Fan(s) driven by individual Fan Motor(s), Fan Guard and Mounting Legs. All fan motors shall be
factory wired to a common electrical control box. The Dry Fluid Cooler shall be arranged for
Vertical Air Flow.
The Glycol Coil shall have aluminum fins bonded to copper tubes and shall have full collars that
completely cover the copper tubes. The coil shall be pressure tested to 350 psig and shall be
designed for counter flow for high heat transfer efficiency.
The Dry Fluid Cooler casing shall be made from a non-corrosive metal to minimize maintenance.
Adjustable mounting legs and supports shall be furnished with the DFC. Vibration isolators of the
rubber and shear or spring type are to be field provided by others.
The motors shall be permanently lubricated, sealed ball bearings, with inherent overload
protection. Motors shall be mounted inside the Dry Fluid Cooler Casing for weather protection.
The direct drive fan blades shall be aluminum, and shall be protected by a heavy gauge, steel
wire, zinc plated, and epoxy coated fan guard. Full width baffles to prevent bypass air shall
separate each fan section.
Dry Fluid Cooler (DFC) requires separate power supply and one set of dry contact from indoor unit
to Enable/Disable.
DFC is equipped with its own control panel that includes power block, fan contactors, aqua stats,
freeze stats, relays and single or dual pump package control as necessary.
Aqua stats are installed in the control panel and bulbs to be attached with leaving water header of
the coil.
For understanding purpose use 4 fan dry fluid cooler with drawing # 700-232-041
The fluid cooler shall be provided with ambient T-stats to control the water temperature during
DX cooling mode. The fluid cooler shall bypass the T-Stat control logic and run all fans
continuously during Energy Miser mode.
Condenser cooling mode

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If the water temperature is above 50Deg. F. (Default setting) the DFC will be in normal condenser
cooling mode. Aqua stat # 1 will be open above 50 Deg. F.
In normal cooling mode, DFC will be enabled by either of the compressor from indoor unit. The
Freeze stat is installed in series of the enabling signal. If the freeze stat opens, the DFC unit will be
fully disabled.
1. The first fan of DFC runs continuously as long as enabling signal is present.
2. The default setting for second fan to cycle OFF is 60 Deg. F and below with aqua
stat
3. The default setting for third fan to cycle OFF is 70 Deg. F. and below with aqua
stat #
4. The default setting for forth fan to cycle OFF is 75 Deg. F. and below with aqua
stat #
5. All these default settings are field adjustable to fine tune the unit operation.
Energy miser cooling mode
During winter months, when water temperature drops bellow the 50Deg. F. the aqua stat # 1 will
close and DFC unit will switch over to free cooling energy miser mode. In Energy miser mode, all
other aqua stat (aqua stat 2, 3 and 4) will be bypassed and all fans will run continuously. The free
cooling temperature set point on Aqua stat # 1 must synchronize with Energy miser water
temperature set point for indoor unit.
Pumps
Summary of Equipment
PUMP PACKAGE: The pump package shall include a close coupled, industrial duty pump with
heavy-duty ball bearings motors, stainless steel shafts and bronze fitted construction. The pump
package shall include pump starter, aqua-stats, and fan cycling contactor(s) to control the
condenser glycol temperature. The control panel shall be factory provided for filed installation in
a weatherproof box provided on the Dry Fluid Cooler. The pump shall be protected with a base
and weather shield from the ambient conditions.
DUAL PUMP PACKAGE (Optional): The dual pump package shall include close-coupled, industrial
duty pumps with heavy-duty ball bearings motors, stainless steel shafts and bronze fitted
construction. The pump package shall include pump starters, aqua-stats, and fan cycling
contactor(s) to control the condenser glycol temperature. The control panel shall be factory
provided for filed installation in a weatherproof box provided on the Dry Fluid Cooler. The pumps
shall be protected with a base and complete vented weather enclosure from the ambient
conditions. The optional Pressure Differential (No Water Flow)Switch shall be provided for field
installation.
GLYCOL PUMP: A matching centrifugal circulating pump is provided for field mounting and piping.
Pump Operation

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When compressor is on the pump and fluid cooler will be enabled. Note that this is in DX cooling.
In free cooling the logic is the same, as pumps is enabled with economizer cooling.
3.9 Special Pump and Dry Fluid Cooler control logic
Pump speed adjusted based on differential pressure across pumps as 2-way control valves modulate.
Dry cooler and Pump controller Sequence of operation
Free cooling mode
Either outdoor air temperature is monitored or a signal from each crac unit (free cooling and DX
condenser) is sent to the pump controller to determine which function is provided.
Fan speed may be increased sufficiently to allow pump minimum operating speed to be maintained
should zone loads decrease, thus decreasing flow below safe pump operation.
Outside air temperature reaches 48F
Pump controls switch to free cooling mode –Fans run 100% until condenser outlet temperature reaches
38F, at which time fans speed will reduce to maintain 38F or minimum pumps speed is reached, then
fans will reduce speed to maintain minimum pump speed, which is accomplished by 2-way valves
modulating open is response to increased condenser water supply temperature.
Controls shall monitor both fan KW and Pump KW energy consumption and determine best speed
combination to maintain lowest condenser supply water temperature during free cooling more.
DX Cooling mode
Outside air temperature 50F
Pump control increases fan speed as condenser water temperature increases. Maintain 65F condenser
outlet water by modulating fan speed. At 75F exiting condenser water temperature fan speed is 100%.
Controls shall monitor both fan KW and Pump KW energy consumption and determine best speed
combination to maintain lowest condenser supply water temperature during DX cooling more.
3.10 Optional features
•Discharge air temperature sensor to prevent overheating or cooling of the air stream
•Outside air temperature sensor for automatic temperature adjustment or economizer
action
•Free-cooling temperature sensor for water cooled systems
•Hot gas bypass either by solenoid or by modulating electronic valve

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•Redundant system operation of two or more units with automatic crossover and
compensation
•Networking to a central command computer, or to an existing building automation system
The System 2200+3L is truly one of the most powerful and flexible controllers available for HVAC
units today.
4.0 CONFIGURATION
The display unit is pre-configured at the factory for the most common user requirements.
Nonetheless, some settings can be changed to adapt the device specific needs. The menus can
be accessed by pressing any point on the touch screen together with the (up) and (Prg) buttons
for at least one second. Alternatively, press the (up) + (down) + (enter) buttons together for at
least one second.
The following operations exit the menu.
1. Pressing the Esc button
2. Automatically 1 minute after a button was pressed or the touch screen touched
3. Pressing the “X” symbol when displayed at the top right
As shown in the Figure 1 in the “Configuration screen”, a combination navigating buttons and
touch screen can be used to input new configuration parameters.
•To access an item, simply press the touch screen on the corresponding indication, or
press the (up) / (down) buttons until selecting it and then confirm by pressing (enter).
•To modify the value of a field, after having activated it (a field is active when the cursor
is flashing inside), press the (up) / (down) buttons to change the value and press (enter)
to save it.
•Pressing Esc before the Enter key will cancel the modifications made to the field.
Figure 1–Configurations screen
4.1 Main menu
The main menu is used to select the three main configuration categories
•Screen Settings: Settings relating to the screen
•Network Configuration: Settings relating to the RS485 network
•General Options: Various settings

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4.2 Screen Settings
The following options are available
•Contrast - Used to set the contrast of the display (from 0 to 100, default: 50)
•Normal Brightness After - Used to set the time after the touch screen or the buttons are
last pressed that the display switches from “high brightness” to “normal brightness”.
Possible values are ranged from 30 s to 15 min, default: 1 min
•Screen Saver Timeout - Used to set the time after the touch screen or the buttons are last
pressed that the display switches off
•After having switched to “normal brightness”. Possible values are range from 30 s to 4
hours (4 hrs.), default: 15 min;
•Calibrate Touch Screen - The touch screen can be calibrated if it is evidently misaligned. To
align the touch screen, press the center of the crosses displayed in sequence. When the
message “Done: touch the screen to ESC” indicates that the operation has been completed
successfully. If the screen displays “Bad: touch to ESC and repeat”, repeat the calibration
process.
Figure 2 - Screen calibration

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4.3 Network Configuration
The following options are available under network configuration screen.
•Terminal Address - Used to set the address of the terminal (from 1 to 32, default: 32). If
the value “--” is set (two dashes are displayed), the terminal will communicate with the
pCO board using the “Point-Point” protocol (not pLAN) : the “Baud Rate”,
•Network Monitor and Setup I/O Board fields will then disappear, as they have no
meaning.
•Baud Rate - Used to set the pLAN communication baud rate. The possible values are 62500
(default) or 115200 (used only if all the devices in the network are configured for this
speed). Note that not all the pLAN devices support the 115200 setting.
•Network Monitor - This is used to display the status of the network (see next paragraph)
•Setup I/O Board / Setup- These fields are used to modify the list of terminals associated
with each individual pCO board, as described in paragraph “pCO: Assigning the list of
private unit ID number.
4.4 Network Monitor
This screen is used to display the status of the network, indicating graphically which devices are
connected for each address. The meanings of the symbols are the following.
Icon
Description
pCO controller active in the network
Any type of terminal active in the network
Current terminal
Device not connected
If activity is detected on the network, the message “Online” is displayed.
Press the Esc button to exit the screen.

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4.5 Assigning Private and Shared terminals
The list of terminals associated with each individual controller board can be modified from the
“Network Configuration” menu as follows.
1. Select the address of the required board using the (up) / (down) buttons in the “Setup I/O
Board” field (only the boards that are effectively on-line can be selected) and confirm by
pressing (enter). If the pLAN network is not working correctly, or no controller board is
present, the field is not modifiable, and “--“(two dashes) will be displayed.
2. Press the “Setup” button: the screens will be displayed in sequence, see Figure 3 for detail.
3. Use the enter button to move the cursor from one field to the next, and (up) / (down)
change the value of the current field. The P:xx field shows the address of the selected board
(in the example, board number 12 has been selected).
4. To exit the configuration procedure and save the data, select the “OK?” field, set “Yes” and
confirm by pressing (enter). Alternatively, if the terminal remains inactive (no button is
pressed) for more than 30 s, the configuration procedure is automatically ended without
saving the changes.
Important: the pGD terminals cannot be configured as “Sp” (shared printer) as the printer
output is not featured. Selecting this mode has no effect on the management of printed
messages sent via pLAN.
Figure 3–Changing unit ID