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02/12

506872−01

*2P0212*

*P506872-01*

Page 1

E

2012 Lennox Industries Inc.

Dallas, Texas, USA

KITS AND ACCESSORIES

Litho U.S.A.

506872−01 
02/12

 Danfoss RTC DDC KIT

INSTALLATION INSTRUCTIONS FOR DANFOSS RTC DDC LB−114470G (86W95)

USED WITH SCC/SGC UNITS

Shipping & Packing List

Package 1 of 1 contains:

1 − Danfoss RTC DDC assembly (A1)

1 − Return air sensor (A2) with P62 connector

1 − Discharge air sensor (RT1) with P63 connector

1 − Bracket, DDC controls

1 − Bag assembly containing:

4 − #8−32 X 1/2" screws 
1 − Wiring diagram sticker
6 − #10−16 X 5/8" screws

Application

The Danfoss RTC DDC is used with SCC/SGC series
units.

An A2 return air sensor monitors return air temperature
and provides input to the DDC to determine unit heating or
cooling function.

An A74 room air sensor is used to monitor space tempera-
ture. Do not install the return air sensor if a room air sensor
is used. The room air sensor is wired to the Prodigy® con-
trol by the controls contractor.

The RT1 discharge air sensor monitors discharge or sup-
ply air temperature.

WARNING

Improper installation, adjustment, alteration, ser-
vice or maintenance can cause personal injury, loss
of life, or damage to property.

Installation and service must be performed by a
qualified installer or service agency.

CAUTION

Physical contact with metal edges and corners
while applying excessive force or rapid motion can
result in personal injury. Use caution when working
near these areas during installation or while servic-
ing this equipment.

WARNING

Electric shock hazard.

Can cause injury or death.

Before attempting to perform any
service or maintenance, turn the
electrical power to unit OFF at
disconnect switch(es).

Unit may have multiple power
supplies.

Installation

1. Disconnect all electrical power to unit.

2. Open compressor section access doors.

3. Depending on the size of unit, perform step 4 or 5.

4.

036, 060, 120 Units:

Position DDC hinged mounting

panel as shown in figure 1. Make sure the DDC faces
the A55 Prodigy control board. Align holes on hinged
bracket with dimples on the unit side. Secure DDC
panel to unit with two 5/8" screws.

SECURE DDC ASSEMBLY TO UNIT
WITH TWO 5/8" SCREWS

DDC HINGED

MOUNTING PANEL

A55 Prodigy

Control

DDC (Faces Prodigy

® 

Control)

UNIT SIDE

(WITH DIMPLES)

Figure 1. 036, 060, 120 Units − Installing DDC

Hinged Mounting Panel

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