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Carrier CRECOMZR052A00, Installation Instructions Manual

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Carrier CRECOMZR052A00 Installation Instructions Manual Download Page 15

15

Fig. 36 — Installing CRBARHOD001A00 Over Relief Damper

Fig. 37 — CRBARHOD001A00 Hood Sides and Top

Caulk the backside of the mating flanges to ensure a watertight

seal. Install the CRBARHOD001A00 over the relief damper and

screw to the return duct, as illustrated in Fig. 36.

Outdoor Air

Hood

CRBARHOD001A00

Relief Hood

Ordered Separately

Field Supplied

Return Duct

Relief Damper

Min 19-1/2”

*Blade Bracket

*Provided with Economizer

Summary of Contents for CRECOMZR052A00

Page 1: ...filters and replacing filters All other operations should be performed by trained service personnel When working on air conditioning equipment observe precautions in the literature tags and labels attached to the unit and other safety precautions that may apply Follow all safety codes including ANSI American National Standards Institute Z223 1 Wear safety glasses and work gloves Use quenching clot...

Page 2: ... for horizontal only 1 Side Replacement Panel for horizontal only 3 Filter Supports 3 Central Retainer 1 Hood Top 1 Left Hood Side 1 Right Hood Side 2 Side Retainer 2 Top Diverters 3 Deflector 4 Outside Air Filter Screens 1 Supply Air Temperature Sensor SAT 60 Screws 1 Seal Strip CRECOMZR053A00 48 50TC 25 30 48 50HC 24 28 580J 558J 25 30 581J 551J 17 20 RGS RAS 300 336 RGH RAH 240 303 1 Damper Ass...

Page 3: ...air temperature sensor supply air temperature sensor and low temperature compressor lockout switch See Fig 1 Return air temperature indoor enthalpy and outdoor enthalpy sensors are available for field installation Field installed CO2 sensors are available See Table 2 Barometric relief dampers provide natural building pressurization control Barometric relief dampers are built into the design and ar...

Page 4: ...Insert provided screw through the bottom left rear of the economizer and into the unit base See Fig 4 Reinstall the unit s left side panel 8 Before the economizer is secured in place on the right hand side remove and save the 12 pin jumper plug from the unit wiring harness See Fig 7 Insert the economizer plug into the unit wiring harness plug NOTE The 12 pin jumper plug should be saved for future ...

Page 5: ... panels Items 4 and 5 to upper panel using the screws provided e Apply seal strip to mating flange of the hood see Fig 10 f Secure hood top Item 3 to upper panel using the screws provided On 44 in chassis remove the screws from across top cover of unit The rear flange of hood top will slide behind unit top over flange g Secure side retainers Item 6 to side panels Items 4 and 5 using the screws pro...

Page 6: ...f Damper Remove Shipping Screw Insert two 2 screws through the panel and into the economizer Apply seal strip to the front of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange 7 7 3 5 6 8 8 2 8 6 4 2 1 2 ITEM DESCRIPTION QTY 1 Filter Supports 3 2 Central Retainer 3 3 Hood Top 1 4 Left Hood Side 1 5 Right ...

Page 7: ...r can be configured for specific job requirements at the controller When not using with a CO2 sensor the DCV Max potentiometer on the controller must be fully closed CCW for the Minimum Position potentiometer to function correctly d Settings for the optional outdoor enthalpy sensor indoor enthalpy sensor power exhaust and CO2 sensor can be configured at the controller 17 Install the hood screens a...

Page 8: ...mizer and into the unit base See Fig 20 Install the new provided left side panel without the duct opening on the unit 8 Before the economizer is secured in place on the right hand side remove and save the 12 pin jumper plug from the unit wiring harness Insert the EconoMi er IV plug into the unit wiring harness plug See Fig 23 NOTE The 12 pin jumper plug should be saved for future use in the event ...

Page 9: ...lief Hood Ordered Separately Field Supplied Return Duct Relief Damper Upper End Panel Shipped On Base Unit Bottom Panel Shipped On Base Unit Indoor Fan Panel Unit s left side panel with duct opening Left front corner post UNIT S LEFT SIDE PANEL ECONOMI ER IV LEFT CORNER POST Left Corner Post Unit s Left Side Panel Economizer IV Economizer Screw Economizer To Base Economizer Unit s Left Side Panel ...

Page 10: ...screws provided i Apply seal strip to top diverters Item 7 j Secure top diverters Item 7 to hood top Item 3 k Install outdoor air screens by sliding them into each of the four spaces created by the hood filter support and central retainers To do so first insert the air screens into pocket created at the end of hood Item 3 then fully put the air screen into place and then slide them back into pocke...

Page 11: ...SAT Bottom panel with Return duct opening Apply seal strip to the front of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange Apply seal strip to the back of this flange 7 7 3 5 6 8 8 2 8 6 4 2 1 2 ITEM DESCRIPTION QTY 1 Filter Supports 3 2 Central Retainer 3 3 Hood Top 1 4 Left Hood Side 1 5 Right Hood Side 1 6 Side Retainer 2 7 Top Diverters 2 8 D...

Page 12: ...ping position on the unit end See Fig 31 2 Remove the side panels located in the hood parts box see Fig 32 3 Install parts as shown in the following exploded view see Fig 33 using the seal strip and screws provided in the parts box Figure 34 illustrates the installed barometric hood parts Fig 30 Barometric Hood Parts Insert Air Screen Slide Into Position 18 3 8 Provided Upper panel Economizer outs...

Page 13: ...13 Fig 31 Shipping Location Vertical Units Fig 32 Barometric Hood Box Parts Location Fig 33 Barometric Hood Exploded View ...

Page 14: ...uct for the relief damper See Fig 35 3 On the field installed economizer CRECOMZR0 A00 a birdscreen or hardware cloth is shipped attached to the bottom panel used for vertical applications NOTE This panel is not used for horizontal return applications Remove the screen from the provided panel and install it over the relief opening cut in return duct 4 Using the blade brackets install the relief da...

Page 15: ...side of the mating flanges to ensure a watertight seal Install the CRBARHOD001A00 over the relief damper and screw to the return duct as illustrated in Fig 36 Outdoor Air Hood CRBARHOD001A00 Relief Hood Ordered Separately Field Supplied Return Duct Relief Damper Min 19 1 2 Blade Bracket Provided with Economizer ...

Page 16: ...e operating range of temperature measurement is 0 F 18 C to 158 F 70 C See Table 4 for sensor temperature resistance values The temperature sensor looks like an eyelet terminal with wires running to it The sensor is located in the crimp end and is sealed from moisture LOW TEMPERATURE COMPRESSOR LOCKOUT SWITCH The EconoMi er IV assembly is equipped with a low ambient temperature lockout switch loca...

Page 17: ...XB078ENT for ICP is required Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting location See Fig 38 When the outdoor air enthalpy rises above the outdoor enthalpy changeover set point the outdoor air damper moves to its minimum position The outdoor enthalpy changeover set point is set with the out door enthalpy set point potentiometer o...

Page 18: ... P E R P O U N D D R Y A I R 85 29 90 32 95 35 100 38 105 41 110 43 35 2 35 2 40 4 40 4 105 41 110 43 45 7 45 7 50 10 50 10 55 13 55 13 60 16 60 16 65 18 65 18 70 21 70 21 75 24 75 24 80 27 80 27 85 29 90 32 95 35 100 38 APPROXIMATE DRY BULB TEMPERATURE F C A A B B C C D D R E L A T I V E H U M I D I T Y HIGH LIMIT CURVE TR1 24 Vac COM TR 24 Vac HOT 1 2 3 4 5 EF EF1 _ P1 T1 P T N EXH 2V 10V EXH Se...

Page 19: ...um position potentiometer to allow the minimum amount of outdoor air as required by local codes to enter the building Make minimum position adjustments with at least 10 F temperature difference between the outdoor and return air temperatures To determine the minimum position setting perform the following procedure 1 Calculate the appropriate mixed air temperature using the following formula TO Out...

Page 20: ... for a given damper position For best results there should be at least a 10 degree difference in outside and return air temperatures TO Outdoor Air Temperature OA Percent of OutdoorAir TR Return Air Temperature RA Percent of ReturnAir TM Mixed Air Temperature Once base ventilation has been determined set the minimum damper position potentiometer to the correct position The same equation can be use...

Page 21: ...ery unit can be added to reduce the moisture content of the fresh air being brought into the building when the enthalpy is high In most cases the normal heating and cooling processes are more than adequate to remove the humidity loads for most commercial applications If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level and energy recovery unit and or a deh...

Page 22: ...OTE This procedure requires a 9 v battery 1 2 kilo ohm resistor and a 5 6 kilo ohm resistor which are not supplied with the EconoMi er IV controller 1 Disconnect power at TR and TR1 All LEDs should be off Exhaust fan contact should be open 2 Disconnect device at P and P1 3 Jumper P to P1 4 Disconnect wires at T and T1 Place 5 6 kilo ohm resistor across T and T1 5 Jumper TR to 1 6 Jumper TR to N 7 ...

Page 23: ...ntiometer to A The Free Cool LED turns on The actuator should drive to between 20 and 80 open 3 Remove the 5 6 kilo ohm resistor and jumper T to T1 The actuator should drive fully open 4 Remove the jumper across T and T1 The actuator should drive fully closed 5 Return EconoMi er IV settings and wiring to normal after completing troubleshooting EconoMi er IV Troubleshooting Completion This procedur...

Page 24: ...r fully open supply air signal Modulation is based on the greater of DCV and supply air sensor signals between closed and either maximum position DCV or fully open supply air signal INPUTS OUTPUTS Demand Controlled Ventilation DCV Enthalpy Y1 Y2 Compressor N Terminal Outdoor Return Stage 1 Stage 2 Occupied Unoccupied Damper Below set DCV LED Off High Free Cooling LED Off Low On On On On Minimum po...

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