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1

Installation Instructions

Read these instructions completely before attempting to install the 

Vertical EconoMi$er X Accessory.

CONTENTS

SAFETY CONSIDERATIONS . . . . . . . . . . . . . .1

GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

EconoMi$er X Sensor Usage . . . . . . . . . . . . . 2

ACCESSORIES LIST. . . . . . . . . . . . . . . . . . . . .2

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . 2-5

EconoMi$er X Standard Sensors . . . . . . . . . .5

EconoMi$er X Control Modes . . . . . . . . . .

 

5-11 

OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . 12

TROUBLESHOOTING . . . . . . . . . . . . . . . . . . 

 

13

SAFETY CONSIDERATIONS

Improper installation, adjustment, alteration, service, maintenance, or 

use can cause explosion, fire, electrical shock or other conditions which 

may  cause  personal  injury  or  property  damage.    Consult  a  qualified 

installer, service agency, or your distributor or branch for information or 

assistance.  The qualified installer or agency must use factory-authorized 

kits or accessories when modifying this product.  Refer to the individual 

instructions packaged with the kits or accessories when installing.
Follow  all  safety  codes.    Wear  safety  glasses  and  work  gloves.    Use 

quenching  cloths  for  brazing  operations  and  have  a  fire  extinguisher 

available.  Read these instructions thoroughly and follow all warnings 

or cautions attached to the unit.  Consult local building codes and 

appropriate national electrical codes (in USE, ANSI/NFPA70, National 

Electrical Code (NEC); in Canada, CSA C22.1) for special requirements.

It is important to recognize safety information.  This is the safety-alert 

symbol      .  When you see this symbol on the unit and in instructions or 

manuals, be alert to the potential for personal injury.

Understand  the  signal  words  DANGER, WARNING,  CAUTION,  and 

NOTE.  These words are used with the safety-alert symbol.

DANGER identifies the most serious hazards which 

will

 result in severe 

personal  injury  or  death.    WARNING  signifies  hazards  which 

could

 

result in personal injury or death.

CAUTION  is  used  to  identify  unsafe  practices,  which 

may

 result in 

minor  personal injury or product and property damage.

NOTE  is  used  to  highlight  suggestions  which 

will

 result in enhanced 

installation, reliability, or operation.

GENERAL

The  EconoMi$er  X  system  utilizes  the  latest  technology  available 

for  integrating  the  use  of  free  cooling  with  mechanical  cooling  for 

packaged rooftop units. The solid-state control system optimizes energy 

consumption,  zone  comfort,  and  equipment  cycling  by  operating  the 

compressors when the outdoor-air temperature is too warm, integrating 

the  compressor  with  outdoor  air  when  free  cooling  is  available,  and 

locking  out  the  compressor  when  outdoor-air  temperature  is  too  cold. 

Demand control ventilation is supported. 
Units displaying 17th position of the model number to indicate that the 

unit  is  equipped  with  the  factory-installed  VFD  (Variable  Frequency 

Drive) option for 2-speed indoor fan control.  The VFD option is required 

for units equipped with EconoMi$er X.  For detailed information on the 

VFD  see  the Variable  Frequency  Drive  (VFD)  Installation,  Setup  and 

Troubleshooting Supplement.
The EconoMi$er X system utilizes gear-drive technology with a direct-

mount  spring  return  actuator  that  will  close  upon  loss  of  power.  The 

EconoMi$er X system comes standard with an outdoor air temperature 

sensor, mixed air temperature sensor. Outdoor enthalpy, indoor enthalpy, 

and  CO2  sensors  are  available  for  field  installation.  See  Table  3  for 

sensor usage.

IMPORTANT

: The economizer outside air dampers meet the ASHRAE 

90.1  leakage  requirements.    Economizer  must  be  installed  perfectly 

square to avoid damper leakage. Squareness tol/- 1/32”.
Standard barometric relief dampers provide natural building pressurization 

control. An optional power exhaust system is available for applications 

requiring even greater exhaust capabilities. The power exhaust set point 

is adjustable at the EconoMi$er X controller.

See Table 1 for package usage. See Table 2 for package contents. See 

Table 3 for sensor usage.

ACCESSORIES LIST

WARNING

ELECTRICAL SHOCK HAZARD

Failure to follow this warning could cause personal injury or death. 

Before performing service or maintenance operations on the unit, 

always  turn  off  main  power  switch  to  unit  and  install  lock(s)  and 

lockout tag(s). Unit may have more than one power switch. Ensure 

electrical  service  to  rooftop  unit  agrees  with  voltage  an  amperage 

listed on the unit rating plate.

CAUTION

CUT HAZARD

Failure to follow this caution may result in personal injury. 

Sheet metal parts may have sharp edges or burrs. Use care and wear 

appropriate  protective  clothing,  safety  glasses  and  gloves  when 

handling parts and servicing roof top units.

!

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Table 1 - Package Usage

Table 2 - Package Contents

UNIT SIZE

PART NUMBER

Small Cabinet,

Footprint size: 46 3/4” x 74 3/8”

CRECOMZR067A02

Large Cabinet,

Footprint size: 58 1/2” x 88 1/8”

CRECOMZR069A03

Extra-Large Cabinet,

Footprint size: 63 3/8” x 115 7/8”

CRECOMZR071A00

PACKAGE NO.

QTY

CONTENTS

CRECOMZR067A00,

CRECOMZR069A00

1

1

1

18

1

1

Hood Top and Sides

Hood Divider

Aluminum Filter

Screws

EconoMi$er X Assembly

Mixed Air Temperature Sensor

CRECOMZR071A00

1

1

1

2

1

1

1

Hood Top and Sides

Hood Divider

Hood Filter Divider

Aluminum Filters

Hardware Bag

EconoMi$er X Assembly

Mixed Air Temp Sensor

Small Rooftop Products

3 to 12 ½ Tons

Vertical EconoMi$er X Accessory

CRECOMZR067A00 

CRECOMZR069A00

CRECOMZR071A00

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Summary of Contents for CRECOMZR067A00

Page 1: ...entilation is supported Units displaying 17th position of the model number to indicate that the unit is equipped with the factory installed VFD Variable Frequency Drive option for 2 speed indoor fan control The VFD option is required for units equipped with EconoMi er X For detailed information on the VFD see the Variable Frequency Drive VFD Installation Setup and Troubleshooting Supplement The Ec...

Page 2: ...y installed outdoor dry bulb temperature sensor with accessory enthalpy sensor HH57AC081 See Fig 1 12 Remove the indoor fan motor access panel See Fig 9 13 The supply air temperature sensor looks like an eyelet terminal with wires running to it The sensor is located on the crimp end and is sealed from moisture Mount the supply air temperature sensor provided to the lower left section of the indoor...

Page 3: ... 43 19 05 29 5 55 lb CRECOMZR069A00 40 37 22 28 24 48 36 27 80lb CRECOMZR071A00 52 92 27 03 33 41 49 92 98lb NOTE The CRECOMZR071A00 hood has 2 aluminum filters and a hood filter divider that installs between the filters See Fig 5A Fig 5 EconoMi er X Installed in HVAC Unit 3 to 6 Ton Shown Fig 4A Hood for Extra Large Cabinet Hood Filter Divider HVAC Unit Filters Insert Screw in EconoMi er X Flange...

Page 4: ...xhaust instructions instead 16 Install the EconoMi er X hood over the EconoMi er X Use screws provided See Fig 10 17 The W7220 EconoMi er X controller is shipped mounted to a bracket Install the controller bracket in the top left corner of the unit control box as shown in wiring diagram Fig 8 Screw in place through pre punched holes 18 Connect the plugs coming from the controller as shown in wirin...

Page 5: ...3 are used to scroll through the menus and menu items select menu items and to change parameter and configuration settings Using the Keypad with Menus To use the keypad when working with menus Press the Up arrow button to move to the previous menu Press the Down arrow button to move to the next menu Press the Enter button to display the first item in the currently displayed menu Press the Menu Up ...

Page 6: ... sensor Displays _ _ _ o F if not connected short or out of range DA TEMP _ _ _o F 0 to 140o F Displays when Discharge Air sensor is connected and displays measured discharge temperature Displays _ _ _o F if sensor sends invalid value if not con nected short or out of range OA TEMP _ _ _o F 40 to 140o F Displays measured value of outdoor air temperature Displays _ _ _o F if sensor sends invalid va...

Page 7: ...a is only set if DCV is used This is the ventilation for less than maximum occupancy of the space In AUTO mode dampers controlled by CFM VENTMIN L 3 7 V VENTMIN H 2 8 V ERV OAT SP 32o F 0 to 50o F increment by 1 Only when AUX1 O ERV EXH1 SET With 2 speed fan units Exh1 L low speed fan and Exh1 H high speed fan settings are required 50 0 to 100 increment by 1 Setpoint for OA damper position when ex...

Page 8: ...or an out of calibration temperature sensor RA H CAL 0 RH 10 RH Allows for operator to adjust for an out of calibration humidity sensor DA T CA 0 0o F 2 5o F Allows for the operator to adjust for an out of calibration temperature sensor CHECKOUT DAMPER VMIN HS n a n a Positions damper to VMIN position DAMPER VMAX HS n a n a Positions damper to VMAX position DAMPER OPEN n a n a Position damper to t...

Page 9: ...and Terminal Blocks Time out and Screen Saver When no buttons have been pressed for 10 minutes the LCD displays a screen saver which cycles through the Status items Each Status item displays in turn and cycles to the next item after 5 seconds Label Type Description Top Left Terminal Block MAT MAT 20k NTC and COM Mixed Air Temperature Sensor Polarity insensitive connections OAT OAT 20k NTC and COM ...

Page 10: ...o F Enthalpy btu lb da Point P1 Point P2 Temp o F Humidity RH Temp o F Humidity RH ES1 80 0 60 0 28 0 80 0 36 8 66 3 80 1 ES2 75 0 57 0 26 0 75 0 39 6 63 3 80 0 ES3 70 0 54 0 24 0 70 0 42 3 59 7 81 4 ES4 65 0 51 0 22 0 65 0 44 8 55 7 84 2 ES5 60 0 48 0 20 0 60 0 46 9 51 3 88 5 HL 86 0 66 0 32 4 86 0 38 9 72 4 80 3 Fig 13 shows the 5 current boundaries There is also a high limit boundary for differ...

Page 11: ...dampers will be closed When SAT rises to 48o F the damp ers will re open to Minimum Position setting Should 100 outside air not be capable of satisfying the space tempera ture space temperature will rise until Y2 is closed The economizer control will call for compressor operation Dampers will modulate to maintain SAT at 50 to 55o F concurrent with Compressor 1 operation The Low Ambient Lockout The...

Page 12: ... power returns above 18 Vac Alarms The Economizer module provides alarm messages that display on the 2 line LCD NOTE Upon power up the module waits several seconds before checking for alarms This allows time for all the configured devices e g sensors actuator to become operational If one or more alarms are present and there has been no keypad activity for at least 5 minutes the Alarms menu display...

Page 13: ...I am using enthalpy sensors Why did the control ask me to input a dry bulb changeover temperature In the even the humidity sensor in the enthalpy sensors fails the backup algorithm in the control is to default to the temperature sensor in the enthalpy sensor In checkout the outdoor damper closes when I command it to open Check the actuator linkage or rotation In the CHECKOUT mode the outdoor dampe...

Page 14: ...n 7310 W Morris St Indianapolis IN Manufacturer reserves the right to discontinue or change at any time specification or designs without notice and without incurring obligations Catalog No IIK CRECOMZR67 01 Edition Date 5 12 Replaces New ...

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