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Airside Economizer Kit

For Vertical

Water Cooled UnitsSupersedes: 145.15-IOM1 (708) Form 145.15-IOM1 (908)

AIRSIDE ECONOMIZER KIT

FOR CPV060-CPV180

WATER-COOLED UNITS

INSTALLATION INSTRUCTIONS

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2/16JOHNSON CONTROLS2

FORM 145.15-IOM1 (908)

This equipment is a relatively complicated apparatus.During installation, operation, maintenance or service,

individuals may be exposed to certain components or

conditions including, but not limited to: refrigerants, oils,

materials under pressure, rotating components, and

both high and low voltage. Each of these items has the

potential, if misused or handled improperly, to cause

bodily injury or death. It is the obligation and respon-

sibility of operating/service personnel to identify and

recognize these inherent hazards, protect themselves,

and proceed safely in completing their tasks. Failure to

comply with any of these requirements could result in

serious damage to the equipment and the property in

IMPORTANT!READ BEFORE PROCEEDING!

GENERAL SAFETY GUIDELINES

which it is situated, as well as severe personal injury ordeath to themselves and people at the site.

This document is intended for use by owner-authorized

operating/service personnel. It is expected that this

individual possesses independent training that will en-

able them to perform their assigned tasks properly and

safely. It is essential that, prior to performing any task

on this equipment, this individual shall have read and

understood this document and any referenced materials.

This individual shall also be familiar with and comply with

all applicable governmental standards and regulations

pertaining to the task in question.

SAFETY SYMBOLS

The following symbols are used in this document to alert the reader to areas of potential hazard:

All wiring must be in accordance with published specications and must be performed ONLYby qualied service personnel. Johnson Controls will not be responsible for damages/problemsresulting from improper connections to the controls or application of improper control signals.Failure to follow this will void the manufacturers warranty and cause serious damage to prop-erty or injury to persons.

DANGER indicates an imminently haz-ardous situation which, if not avoided,will result in death or serious injury.

CAUTION identies a hazard which couldlead to damage to the machine, damageto other equipment and/or environmentalpollution. Usually an instruction will

be given, together with a brief expla-nation.

WARNING indicates a potentially haz-ardous situation which, if not avoided,could result in death or serious injury.

NOTE is used to highlight additional in-formation which may be helpful to you.

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FORM 145.15-IOM1 (908

3JOHNSON CONTROLS

CHANGEABILITY OF THIS DOCUMENT

In complying with Johnson Controls policy for continu-

ous product improvement, the information contained

in this document is subject to change without notice.

While Johnson Controls makes no commitment to up-

date or provide current information automatically to the

manual owner, that information, if applicable, can be

obtained by contacting the nearest Johnson Controlsservice ofce.

It is the responsibility of operating/service personnel as

to the applicability of these documents to the equipmen

in question. If there is any question in the mind of oper-

ating/service personnel as to the applicability of these

documents, then, prior to working on the equipment, they

should verify with the owner whether the equipment has

been modied and if current literature is available.

Work on this equipment should only be done by properly trained personnel who are qualied to

work on this type of equipment. Failure to comply with this requirement could expose the worker,

the equipment and the building and its inhabitants to the risk of injury or property damage.

The instructions are written assuming the individual who will perform this work is a fully trainedHVAC & R journeyman or equivalent, certied in refrigerant handling and recovery techniques, andknowledgeable with regard to electrical lock out/tag out procedures. The individual performingthis work should be aware of and comply with all national, state and local safety and environ-mental regulations while carrying out this work. Before attempting to work on any equipment,the individual should be thoroughly familiar with the equipment by reading and understandingthe associated service literature applicable to the equipment. If you do not have this literature,you may obtain it by contacting a Johnson Controls Service Ofce.

Should there be any question concerning any aspect of the tasks outlined in this instruction,

please consult a Johnson Controls Service Ofce prior to attempting the work. Please be aware

that this information may be time sensitive and that Johnson Controls reserves the right to revise

this information at any time. Be certain you are working with the latest information.

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4/16JOHNSON CONTROLS4

FORM 145.15-IOM1 (908)

TABLE OF CONTENTSTABLE OF CONTENTS

Installation 5

Vertical Water Cooled Units 6

Mixing Box Vertical Water Cooled Units 7

Damper and Actuator Setup 8

Sequence of Operation 9w/ Electro-Mechanical Thermostat 9

w/ T7300 Thermostat 10

Interconnection Diagram 11

3-20 Ton T7300 Programmable Thermostat 11

3-20 Ton Electro-Mechanical Thermostat 12

25 Ton T7300 Programmable Thermostat 12

Limited Waranty 15

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FORM 145.15-IOM1 (908

7JOHNSON CONTROLS

Economizer Mixing Box

Vertical Water Cooled

CPV

LD1342

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8/16JOHNSON CONTROLS8

FORM 145.15-IOM1 (908)

LD13422

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FORM 145.15-IOM1 (908

9JOHNSON CONTROLS

Modulating Economizer with Electro-Mechanical Thermostat

The Honeywell W7215 module, ML series actuators, Skymark damper sections and wiring harness comprise an

integrated economizer. Economizers are used to provide ventilation and free cooling for the Skymark series of verti-

cal and horizontal through the wall air handlers.

The Honeywell W7215 accepts inputs from a room thermostat, outdoor and return air enthalpy sensors a dischargeair sensor as well as an optional CO2 sensor. Additional contact inputs and outputs are available on the module to

enable a variety of ventilation strategies; through the activation of supply and exhaust fans.

Powering the Thermostat (24vac).

Power to the electromechanical thermostat is provided from R terminal of the Skymark units low voltage termina

strip. Electromechanical thermostats do not require a 24 vac common connection.

Powering the W7215 (24vac).

The W7215 is designed to be powered from the Skymark air handler when the fan of the air handler is operating.

To ensure that the W7215 is powered the fan switch on the thermostat subbase should be left on at all times. In this

way the economizer will be powered from the G terminal on the thermostat.

Night Operation.

Night set back or set up of hvac equipment utilizing electromechanical thermostats requires two thermostats one

each for day and night set points. Switching between thermostats is accomplished utilizing a time clock and switch-

ing relay.

Typically the outside air dampers are held closed during night time operation. Contacts SD1 and SD2 of the W7215

will maintain the dampers in the closed position when jumpered. Contacts SD1 and SD2 are wired through the

economizer wiring harness to terminals A1 and A2 located on the low voltage terminal strip. Do not provide 24 vac

to these terminals.

High Enthalpy Sequence:

When the outside air enthalpy exceeds the enthalpy setpoint on the W7215 the NO contacts of relays 1Kand

2Kclose.

First Stage Cooling:A cooling signal from the thermostat Y1, rst stage cooling is routed through NO contact 1K

to engage the rst compressor of the Skymark unit.

Second Stage Cooling:A second call for cooling Y2 is routed through the NO contact 2K to engage the secondcompressor. During this sequence the outside dampers are held at a preset minimum position. The minimum may

be overridden from a remote potentiometer.

Low Enthalpy Sequence:

To prevent operation of mechanical cooling at low temperatures during the economizer cycle, a low ambient outdoo

thermostat LL-1 can be installed if desired. The contacts are connected to TB-3. If the outdoor temperature is below

the set point of LL-1, and the N.O. FREE COOLING contacts of the W7215 are closed, 24 vac will be supplied to

the holding coil of R3 opening their NC contacts so that mechanical cooling will be disabled.

First Stage Cooling:During the low enthalpy sequence relays 1K and 2K are not energized. The rst call for cool

ing Y1 powers relay IS through the NC contact 1K. When IS is powered IS1 closes enabling the discharge sensor

C7046 to modulate the outside air and return air damper.

Second Stage Cooling:A second call for cooling Y2 is routed through the NC contact 2K of the W7215 to

energize the rst compressor.

Damper Modulation:

On Skymark units as well as most rooftop hvac units the C7046 should be located in the discharge air duct. Because

of short duct runs effective sensing and control of the mixed air temperature is not possible. Locating the sensor in

the discharge air provides effective sensing and control. The outside air damper remains at minimum position if the

discharge air temperature is below 500F or 100C. If the discharge air temperature is between 500 to 560F or 100

to 13.30C the outside air damper will not modulate. Above 560F or 100C the dampers will modulate.

Sequence of Operation - Airside Economizer with Electro-Mechanical Thermostat

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10/16JOHNSON CONTROLS10

FORM 145.15-IOM1 (908)

Modulating Economizer with T7300 Thermostat

The Honeywell W7215 module, ML series actuators, Skymark damper sections and wiring harness comprise an

integrated economizer. Economizers are used to provide ventilation and free cooling for the Skymark series of verti-

cal and horizontal through the wall air handlers.

The Honeywell W7215 accepts inputs from a room thermostat, outdoor and return air enthalpy sensors, a discharge

air sensor, as well as an optional CO2 sensor. Additional contact inputs and outputs are available on the module toenable a variety of ventilation strategies; through the activation of supply and exhaust fans.

Powering the W7215 (24vac).

The W7215 is designed to be powered from the Skymark air handler when the fan of the air handler is operating.

To ensure that the W7215 is powered the fan operation mode should be left in the T7300 default setting. In this way

the economizer will be powered from the G terminal on the thermostat.

Night Operation.

The blower operates continuously during occupied periods and intermittently during unoccupied periods. Since this

would cause the economizer to open during unoccupied periods, N.O. contacts A3 and A2 on the T7300 subbase

are wired to the air handlers low voltage terminal strip. When contacts A3 and A2 on the thermostat subbase make

at night, SD1 and SD2 are effectively jumpered and the outside dampers of the economizer remain closed during

night operation of the blower.

High Enthalpy Sequence:

When the outside air enthalpy exceeds the enthalpy setpoint, the NO contacts of relays 1K and 2K close.

First Stage Cooling:A cooling signal from the thermostat Y1, rst stage cooling is routed through NO contact 1K

to engage the rst compressor of the Skymark unit.

Second Stage Cooling:A second call for cooling Y2 is routed through the NO contact 2K to engage the second

compressor.

Third Stage Cooling:Twenty-ve ton units only: A third call for cooling is routed directly from the thermostat via

the wiring harness to through the NC contact of R4 and the NC contact of R3 (4-5) to the third compressor. During

this sequence the outside dampers are held at a preset minimum position. The minimum may be overridden from

a remote potentiometer.

Low Enthalpy Sequence:

To prevent operation of mechanical cooling at low temperatures during the economizer cycle, a low ambient outdoor

thermostat LL-1 can be installed if desired. The contacts are connected to TB-3. If the outdoor temperature is below

the set point of LL-1, and the N.O. FREE COOLING contacts of the W7215 are closed, 24 vac will be supplied to

the holding coil of R3 opening the NC contacts so that mechanical cooling will be disabled.

First Stage Cooling:During the low enthalpy sequence relays 1K and 2K are not energized. The rst call for cool-

ing Y1 powers relay IS through the NC contact 1K. When IS is powered IS1 closes enabling the discharge sensor

C7046 to modulate the outside air and return air damper.

Second Stage Cooling:A second call for cooling Y2 is routed through the NC contact 2K of the W7215 to

energize the rst compressor.

Third Stage Cooling:Twenty-ve ton units only: The holding coil of R4 is energized whenever a low enthalpy

condition is sensed by the W7215. The third call for cooling Y3 is routed through the NO contacts of R4 (which

are now closed) through the NC contact of R3 (2-1) to terminal 4 of the W7215 and from there to the secondcompressor. At this time the outside damper will modulate in response to the discharge sensor, Y2 will engage

the rst compressor and Y3 will engage the second compressor.

Damper Modulation:

On Skymark units as well as most rooftop hvac units the C7046 should be located in the discharge air duct.

Because of short duct runs effective sensing and control of the mixed air temperature is not possible. Locating

the sensor in the discharge air provides effective sensing and control. The outside air damper remains at

minimum position if the discharge air temperature is below 500 F or 100 C. If the discharge air temperature is

between 500 to 560 F or 100 to 13.30 C the outside air damper will not modulate. Above 560 F or 100 C the

dampers will modulate.

Sequence of Operation - Airside Economizer with Honeywell T-7300 Thermostat

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FORM 145.15-IOM1 (908

11JOHNSON CONTROLS

Interconnec

tion

Diagram

AirSi

de

Econom

izer

3-2

0Ton

T7300Programma

bleThremosta

t

L D 1 3 4 2 3

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12/16JOHNSON CONTROLS12

FORM 145.15-IOM1 (908)

Interconnec

tion

Diagram

Airsi

de

Econom

izer

3-2

0Ton

Electro-Mec

han

ica

lThermos

tat

LD13425

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FORM 145.15-IOM1 (908

13JOHNSON CONTROLS

Interconnec

tion

Diagram

Airs

ide

Econom

izer

25Ton

T7300Prog

ramma

bleThermos

tat3-Stage

L D 1 3 4 2 5

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FORM 145.15-IOM1 (908)

NOTES

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FORM 145.15-IOM1 (908

15JOHNSON CONTROLS

LIMITED WARRANTY

Johnson Controls warrants this product to be free from defects in workmanship or material for a period of one year from date of original

installation or 18 months from date of shipment, whichever comes rst.

Johnson Controls obligation under this Warranty is LIMITED to repairing or replacing at our sole option, at our factory, any part thereof

which shall be returned to our factory, transportation charges prepaid and which on examination proves to have been thus defective

under normal domestic use not exceeding the fuel rating. The defective part should be returned through a qualied servicing dealer.

Upon warranty determination, the replacement part will be shipped freight collect and assumes the unexpired portion of this Limited

Warranty.

When a defective part can be repaired or replaced, Johnson Controls shall not be obligated to repair the entire unit or any part thereof

other than the defective part.

This warranty applies only to the original homeowner, and is subject to the terms and conditions hereof.

COMPRESSOR FIVE YEAR LIMITED WARRANTY

In addition to the One Year Limited Warranty, Johnson Controls warrants the compressor to be free from defects in workmanship or

material for a period of ve (5) years from the date of original installation. If a compressor fails during this ve year period, a new com-

pressor will be supplied. The customer will be responsible for freight costs from our factory for delivery of the replacement compres-

sor and also for the return of the defective compressor which may be required under the terms of the Warranty. Labor and any other

expense involved in replacing the compressor is not covered by this Warranty.

LABOR AND COST NOT COVEREDThis Warranty provides only replacement parts or credits, and does not provide for or cover any labor, shipping, handling or other costs

for service travel, servicing, removing, or installing any parts.

EXCLUSIONSThis Warranty shall be void if:

1. The unit is not installed by a licensed or otherwise qualied or contractor and in compliance with the Installation Manual, applicable

installation and good trade practices.

2. The defect or damage is caused by accident, abuse, negligence of any person or company, misuse, riot, ood, re or Acts of

God.

3. The unit is not operated and regularly serviced and maintained as called for in the Users Manual.

4. Damages are caused by operating the unit in a commercial or corrosive atmosphere containing any damaging or dangerous

chemicals.5. The unit is modied or services in a manner not in accordance with the Installation Manual and Users Manual.

6. Components, replacement parts, or other accessories not compatible with the unit or not approved by Johnson Controls have

been used with or attached to the unit.

7. The defect or damage is not caused by Skymark, or it arises from circumstances beyond the control of Johnson Controls.

8. The unit is installed outside the United States or Canada, or has been removed from the place where it was originally installed.

THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, OBLIGATIONS OR LIABILITIES, EXPRESSED OR IMPLIED BY

EMPLOYEES OR REPRESENTATIVES OF JOHNSON CONTROLS. ALL STATUTORY, EXPRESSED OR IMPLIED WARRANTIES,

INCLUDING THE IMPLIED WARRANTY OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY

NEGATED AND EXCLUDED. ANY CLAIMS FOR INCIDENTAL AND CONSEQUENTIAL DAMAGES, OR ANY OTHER DAMAGES

OR EXPENSES BEYOND THE TERMS OF THIS LIMITED WARRANTY ARE HEREBY EXPRESSLY NEGATED AND EXCLUDED.

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Subject to change without notice. Printed in U.S.A.

Copyright 2008 by Unitary Products Group. All rights reserved.

Form 145.15-IOM1 (908)

Supersedes 145.15-IOM1 (708)

York

PA

17405

P.O. Box 1592

York, PA

17405

Engineered Systems

Products

Group