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DESCRIPTION
The installation of this kit (2RT04701A) replaces the W7400
module and will obsolete the T7400 thermostat. A new ther-
mostat will be required to operate the unit.
This kit contains all necessary electrical components, sheet-
metal parts, and wires to replace the W7400 module and the
T7400 thermostats used in all Constant Volume 30-40 Ton
Millennium Style A units. The kit contains the wiring needed
for all options including CV W/ Economizer, CV W/O Econo-
mizer, Optional Gas Heat, and Optional Electric Heat.
ures 1 and 2 illustrate the location of the Millennium controls
and the location of the W7400 in the control section. The
new low-voltage electric box will be as shown in Figure 4.
TABLE 1: PARTS SUPPLIED FOR CONTROL
CHANGE
QTY
PART N
.
O
1
073-21599-000
1
025-16100-000
1
025-32699-000
5
024-24116-000
4
021-15512-000
1
035-16634-000
1
035-16636-000
1
035-16635-000
1
035-16637-000
1
035-16165-000
1
035-16148-000
1
373-22695-000
1
373-22694-000
1
373-22696-000
1.
See Table 4 for complete listing of wires in the CV with
Economizer Package.
2.
See Table 2 for complete listing of wires in the CV with-
out Economizer Package
3.
See Tables 3 and 5 for complete listing of wires in the
CV unit with heat package
2
Fig-
DESCRIPTION
Backplate Bracket
Terminal Block, 10 Pole
Transformer, 24V to 24V
Isolation Relay
#10 Sheet metal Screws
CV w/ECON
Wiring Diagram
CV w/ECON
Connection Diagram
CV W/O ECON Wiring Diagram
CV W/O ECON Connection
Diagram
CV Electric Heat Wiring
Diagram
CV Gas Heat Wiring Diagram
CV With Economizer Wire
1
Pkg.
CV W/O Economizer Wire
2
Pkg.
3
CV With Heat Wire
TABLE 2: PARTS SUPPLIED FOR CV UNITS W/O
ECONOMIZER
QTY
PART NO.
1
373-18641-653
1
373-18641-654
1
373-18641-659
1
AB008RED7171230
1
AB024YEL5471240
1
AB024ORN7171244
1
AB027GRA7171248
1
AB022GRA7171800
1
AB007YEL7171801
1
AB007ORN7171802
1
AB009PRP7171803
1
AB012GRA7171821
1
AB018BRN7171836
1
AB027PRP7171839
1.
See Table 3 for units with optional heat.
530.70-N1.11Y
1
DESCRIPTION
201/R
816/R
252/R
257/Y
817/Y
818/Y
819/Y
842/BR
814/BR
813/BR
812/BR
834/BR
835/BR
230/R
240/Y
244/O
248/GY
800/GY
801/Y
802/O
803/PR
821/GY
836/BR
839/PR
Unitary Products Group
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