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Rheem RXRD-NDCM3, Installation Instructions Manual, Page: 11 / 12

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Rheem RXRD-NDCM3 Installation Instructions Manual Download Page 11

Hor i zon tal  Mod u lat ing  Gear  Economizer

RKKB / RLKB 090-240

Notes:
1.  Unit wir ing shown as ref er ence only.  Check unit wir ing for ac tual unit wir ing.
2.

Re lays 1K and 2K ac tu ate when the Out door Air Enthalpy is lower than the Re turn Air Enthalpy.

3.

1S is an elec tronic switch which closes when pow ered by a 24 VAC in put.

4.

Fac tory in stalled re sis tor should be re moved only if C7400 Dif fer en tial Enthalpy Sen sor is added.

5.

Y2 must be en er gized for the com pres sor to op er ate.

WIRE COLOR 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

Re vi sion

Change

Date

A

Changed Mixed Air Sensor

02-23-06

B

Ex changed wire 3 & 4

03-29-06

C

Switched wires 3 & 4 on PL7

01-04-08

D

ECN# 5938

08-18-11

E

ECN# 6467

05-01-13

HARNESS ENDS AT PL7

CONNECTOR & CONTACT CONFIGURATION

PL7 (300000297) CAP - (300000558) SOCKET

J2 (300000291) CAP - (300000558) SOCKET

Date: May 1, 2013

Supersedes: 08-18-11

Drawn by: MGL

Unit #: 60-394-13/15

Di a gram#:  6039413W

Ap proved  by:

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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