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INSTALLATION INSTRUCTIONS 

MODELS RXRD-NDCM3 & RXRD-NFCM3

HORIZONTAL AIRFLOW ECONOMIZERS

WARN ING

THIS ACCESSORY IS TO BE INSTALLED BY A QUALIFIED, LICENSED SERVICE PERSON. TO AVOID

UNSATISFACTORY OPERATION OR DAMAGE TO THE PRODUCT AND POSSIBLE UNSAFE CONDITIONS,

INCLUDING ELECTRICAL SHOCK, REFRIGERANT LEAKAGE AND FIRE, THE INSTALLATION

INSTRUCTIONS PROVIDED WITH THIS ACCESSORY MUST BE STRICTLY FOLLOWED AND THE PARTS

SUPPLIED USED WITHOUT SUBSTITUTION. DAMAGE TO THE PRODUCT RESULTING FROM NOT

FOLLOWING THE INSTRUCTIONS OR USING UNAUTHORIZED PARTS MAY BE EXCLUDED FROM THE

MANUFACTURER’S WARRANTY COVERAGE.

DISCONNECT ELECTRICAL POWER TO THE UNIT. FAILURE TO DO SO CAN CAUSE ELECTRICAL SHOCK

RESULTING IN PERSONAL INJURY OR DEATH.

WARN ING

TOOLS  RE QUIRED  FOR  IN STAL LA TION:

3

8

" elec tric drill with 

5

16

" socket

Small flat blade (0.125" wide) screw driver

Wa ter proof  ex te rior  duct  seal ant

Sheet metal tools (e.g. shears)

PACK AGE  CON TENTS

RXRD-NDCM3

economizer with

controller, actuator,

and outside enthalpy

sensor attached

RXRD-NFCM3

economizer with

controller, actuator, and
outside enthalpy sensor

attached

ITEM

DE SCRIP TION

PART No.

PART No.

1

Discharge Air Sensor (Hardware Bag)

6039413 / 3112

6039415 / 3112

2

(2) Permanent Filters

6039413 / 8567

(11.875" X 23.875")

6039415 / 8568

(23.875" X 23.875")

3

(2) Spotweld Assy - Bird Screen

6039413 / BSWA

6039415 / BSWA

4

(2) Exhaust Air Rainhood - Top 

6039413 / EHT2

6039415 / EHT2

5

OA Rainhood Assy - Left Side

6039413 / EHSL

6039415 / EHSL

6

OA Rainhood Assy - Right Side

6039413 / EHSR

6039415 / EHSR

7

(2) Exhaust Air Rainhood - Left Side

6039413 / EHS3L

6039415 / EHS3L

8

(2) Exhaust Air Rainhood – Right Side

6039413 / EHS3R

6039415 / EHS3R

9

OA Rainhood Assy - Filter Bracket Strip

6039413 / ADP

6039415 / ADP

10

OA Rainhood Assy – Top

6039413 / EHT

6039415 / EHT

11

OA Rainhood - Front Filter Support

6039413 / EHB

6039415 / EHB

12

OA Filter Rail

6039413 / FCH

6039415 / FCH

13

Hardware Bag

6039413 / HDW

6039415 / HDW

TABLE 1

Summary of Contents for RXRD-NDCM3

Page 1: ...ver Waterproof exterior duct sealant Sheet metal tools e g shears PACKAGE CONTENTS RXRD NDCM3 economizer with controller actuator and outside enthalpy sensor attached RXRD NFCM3 economizer with controller actuator and outside enthalpy sensor attached ITEM DESCRIPTION PART No PART No 1 Discharge Air Sensor Hardware Bag 6039413 3112 6039415 3112 2 2 Permanent Filters 6039413 8567 11 875 X 23 875 603...

Page 2: ... Retain screws STEP 3 Fasten RETURN COVER SEE FIGURE 2 over bottom return opening using retained screws 2 on RXRD NDCM3 4 on RXRD NFCM3 STEP 4 Remove screws from 3 sides of ROOF PANEL so that it can be raised during economizer insertion STEP 5 Remove jumper plug and connect unit ECONOMIZER PLUG to economizer mating plug and slide economizer into unit Save the jumper plug in this compartment for di...

Page 3: ...ws provided 2 each on RXRD NDCM3 3 each on RXRD NFCM3 STEP 10 Slide PERMANENT FILTERS between OA RAINHOOD LEFT SIDE and OA RAINHOOD RIGHT SIDE back into the 12 OA FILTER RAIL STEP 11 Fasten 11 OA RAINHOOD FRONT FILTER SUPPORT to PANEL TOP LEFT The bottom lip should support the PERMANENT FILTERS STEP 12 Fasten PANEL TOP LEFT to OA RAINHOOD LEFT SIDE and OA RAINHOOD RIGHT SIDE and 11 OA RAINHOOD FRO...

Page 4: ...r access panel SEE FIGURE 5 STEP 18 Connect the DISCHARGE AIR SENSOR to wires 51 and 52 located in the blower motor compartment NOTE Mixed air sensor should be secured with the included wire tie to avoid entanglement with the blower and direct contact with any sheet metal surfaces STEP 19 Replace the blower motor access panel STEP 20 Upon start up check the economizer sequence of operation using t...

Page 5: ... at which the power exhaust fan s will engage The LED labeled EXH below the potentiometer adjustment will indicate when power exhaust is available When the power exhaust call is made the controller provides a 60 30 second delay before exhaust fan activation to allow the damper to reach the appropriate position B Range of adjustment is from 0 100 2 10V in most applications the power exhaust is set ...

Page 6: ...open G Compatible CO2 sensors will have a 2 10Vdc output for a 0 1500 ppm CO2 input H Ensure proper polarity of the sensor wires when connecting to the economizer controller Incorrect polarity negates the sensor signal 5 Economizer Setpoint A Only the coolest driest outside air is used for economizer operation when the potentiometer is on setting D For greatest energy savings the potentiometer is ...

Page 7: ...actory installed jumper is normally present c Remove outdoor air enthalpy sensor from terminals SO and SO and install the 1 2k ohm resistor d Put 620 ohm resistor across terminals SR and SR factory installed 620 ohm resistor is normally present and can be used e Put 5 6k ohm resistor across T and T1 3 a Turn EXH Set Exhaust fan Setpoint potentiometer fully CCW b Turn Min Pos Minimum Outside Air Da...

Page 8: ...proximately 6 VDC is present replace damper actuator If voltage not present or LED s do not light replace controller The Free Cooling LED turns off the EXH LED turns off If only one stage of cooling is called by the thermostat then that stage will turn back on If two stages are called by the thermostat then both stages will turn on The power exhaust optional contacts open the outside air damper fu...

Page 9: ...or placed across terminals T and T1 Reset the thermostat setting so that a call for heating is present The Free Cooling LED turns off the EXH LED turns off If only one stage of heating is called by the thermostat then that stage will turn on If two stages are called by the thermostat then both stages will turn on The power exhaust optional contacts will open The outside air damper fully closes Per...

Page 10: ...h warm soapy water The replacement mist eliminator size is listed on the first page of these instructions 2 When diagnosing the system the best results are obtained by first putting the fan setting on the Thermostat to the Continuous Fan mode 3 Operation of the optional power exhaust only depends upon the supply fan running and the damper position it is possible to set the minimum position high en...

Page 11: ... CODE BLK Black BLU Blue BRN Brown GRN Green GRY Gray ORG Orange RED Red TAN Tan VIO Violet WHT White YEL Yellow COMPONENT CODE 9RT1H Mixed Air Sensor C7400A Fresh Air Sensor J2 Power Exhaust Cap MS7106K Damper Actuator 24v PL6 Male A C Unit Plug PL7 Female Economizer Cap W7213A Logic Module Revision Change Date A Changed Mixed Air Sensor 02 23 06 B Exchanged wire 3 4 03 29 06 C Switched wires 3 4...

Page 12: ...RMIHE13 SUPERCEDES 08 18 11 MAY 2 2013 ...

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