York MILLENNIUM STYLE A User manual

CONTENTS
DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
CV UNITS W/O ECONOMIZER . . . . . . . . . . . . . . . . 3
UNITS W/O ECONO & OPT GAS OR ELEC HEAT . . . . 5
CV UNITS WITH ECONOMIZER . . . . . . . . . . . . . . 10
CV UNITS W/ ECONOMIZER & OPTIONAL HEAT . . . 11
LIST OF FIGURES
1 POWER & CONTROL WIRING LOCATION . . . . . . . . . 3
2 EXISTING CTRL PANEL COMPONET LOC . . . . . . . . . 3
3 TYPICAL THERMOSTAT WIRING . . . . . . . . . . . . . . . . 3
4 NEW LOW VOLTAGE CONTROL COMPONETS . . . . . 4
5 CV UNIT W/O A ECONO WIRING DIA . . . . . . . . . . . . . 6
6 CV UNIT W/O ECONO WIRING DIA . . . . . . . . . . . . . . . 7
7 COOLING UNIT W/ ELEC HT DIA & W/O ECONO . . . . 8
8 CV UNIT W/ GAS HT & W/O ECONO WIRING DIA . . . 9
9 CV UNIT W/ ECONO WIRING DIA . . . . . . . . . . . . . . . 12
10CV UNIT W/ ECONO CONNECTION DIA . . . . . . . . . . 13
11CV UNIT W/ GAS HT & ECONO WIRING DIA . . . . . . 14
12UNIT W/ ECONO & ELEC HT WIRING DIA . . . . . . . . . 15
LIST OF TABLES
1 PARTS SUPPLIED FOR CONTROL CHANGE . . . . . . . 2
2 PARTS SUPPLIED FOR CV UNITS W/O ECONO . . . . 2
3 PARTS SUPPLIED FOR CV UNITS W/ OPT HEAT . . . 3
4 PARTS SUPPLIED FOR CV UNITS W/ ECONO . . . . . 10
5 PARTS SUPPLIED FOR CV UNITS W/ OPT HEAT . . 10
INSTALLATION
INSTRUCTION
CAUTION: READ ALL SAFETY GUIDES BEFORE YOU
BEGIN TO INSTALL YOUR UNIT.
SAVE THIS MANUAL
MILLENNIUM™ ROOFTOP
CONTROLS UPGRADE FROM STYLE A TO
STYLE C
035-16728-000 REV A (799)Form 530.70-N1.11Y
MODELS:
Y13
Y14
STYLE A TO STYLE C

530.70-N1.11Y
2Unitary Products Group
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. Fig-
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 NO. DESCRIPTION
1 073-21599-000 Backplate Bracket
1 025-16100-000 Terminal Block, 10 Pole
1 025-32699-000 Transformer, 24V to 24V
5 024-24116-000 Isolation Relay
4 021-15512-000 #10 Sheet metal Screws
1 035-16634-000 CV w/ECON
Wiring Diagram
1 035-16636-000 CV w/ECON
Connection Diagram
1 035-16635-000 CV W/O ECON Wiring Diagram
1 035-16637-000 CV W/O ECON Connection
Diagram
1 035-16165-000 CV Electric Heat Wiring
Diagram
1 035-16148-000 CV Gas Heat Wiring Diagram
1 373-22695-000 CV With Economizer Wire
Pkg.1
1. See Table 4 for complete listing of wires in the CV with
Economizer Package.
1 373-22694-000 CV W/O Economizer Wire
Pkg.2
2. See Table 2 for complete listing of wires in the CV with-
out Economizer Package
1 373-22696-000 CV With Heat Wire3
3. See Tables 3 and 5 for complete listing of wires in the
CV unit with heat package
TABLE 2: PARTS SUPPLIED FOR CV UNITS W/O
ECONOMIZER1
QTY PART NO. DESCRIPTION
1 373-18641-653
201/R
816/R
252/R
1 373-18641-654
257/Y
817/Y
818/Y
819/Y
1 373-18641-659
842/BR
814/BR
813/BR
812/BR
834/BR
835/BR
1 AB008RED7171230 230/R
1 AB024YEL5471240 240/Y
1 AB024ORN7171244 244/O
1 AB027GRA7171248 248/GY
1 AB022GRA7171800 800/GY
1 AB007YEL7171801 801/Y
1 AB007ORN7171802 802/O
1 AB009PRP7171803 803/PR
1 AB012GRA7171821 821/GY
1 AB018BRN7171836 836/BR
1 AB027PRP7171839 839/PR
1. See Table 3 for units with optional heat.

530.70-N1.11Y
Unitary Products Group 3
The new thermostat requires a thermostat cable with a mini-
mum of 10 conductors that run from the sub-base to the con-
trol box. The new wire will be connected as shown in Figure
3.
1. Locate the W7400 control module in the box-electric
(Figures 1 and 2).
2. Remove the following wires form the W7400 control
module and from the unit.
•201/R
•208/BR
•254/GY
•252/Y
•257/Y
•248/GY
•240/Y
•244/0
•246/PR
NOTE: Wire ties will need to be removed to remove above
wires.
3. Disconnect wire 204/BR from the TR terminals on the
w7400 control module.
NOTE: These wires will be used with the new controls.
4. Disconnect thermostat wire from terminals 1-4 on the
W7400 control module.
NOTE: This wire will be used with the new controls.
NOTE: STEPS 5 THROUGH 7 ARE FOR OPTIONAL HEAT
ONLY.
TABLE 3: PARTS SUPPLIED FOR CV UNITS WITH
OPTIONAL HEAT
QTY PART NO. DESCRIPTION
1 373-18689-610 820/Y
823/Y
1 373-18689-611 822/BR
826/BR
1 AB144GRA7171844 844/GY
1 AB144WHT7171845 845/W
2 024-24116-000 Isolation Relay
FIGURE 1: POWER & CONTROL WIRING
LOCATION
FIGURE 2 : EXISTING CONTROL PANEL COMPO-
NET LOCATION
FIGURE 3 : TYPICAL THERMOSTAT WIRING
OPEN ALL DISCONNECTS BEFORE SERVIC-
ING THIS UNIT.

530.70-N1.11Y
4Unitary Products Group
5. Disconnect wire 526/R from the 30FU location.
NOTE: This wire will be used with the new controls.
6. Disconnect wire 533/GY from the W7400 control module
G terminal.
7. Disconnect wires 510/GY and 512/w from W1 & W2.
NOTE: These wires will be used with the new controls.
8. Remove the W7400 control module from the control box.
9. Locate the new control plate in box-electric in the loca-
tion shown in Figure 4.
10. Using the four drill screws secure the back plate to the
box-electric.
11. Locate the packet of wires marked with “No Econo-
mizer”.
12. Attach thermostat wires to new location TB12
(See Figure 3).
NOTE: For the following steps (13-34) see Figures 5, and 6
respectively.
13. Attach wire 230/R from 8T-7 to TB12-R .
14. Attach wire 836/BR from TB2 to 8T-6.
15. Attach wire 842/BR from 8T-6 to MR-B.
16. Attach wire 814/BR from MR-B to CR1-B.
17. Attach wire 813/BR from CR1-B to CR2-B.
18. Attach wire 812/BR from CR2-B to CR3-B.
19. Attach wire 834/BR from CR3-B to CR4-B.
20. Attach wire 835/BR from CR4-B to TB12-C.
21. Attach wire 800/GY from MR-A to TB12-G.
22. Attach wire 801/Y from CR1-A to TB12-Y1.
23. Attach wire 802/O from CR2-A to TB12-Y2.
24. Attach wire 803/PR from CR3-A to TB12-Y3.
25. Attach wire 821/GY from CR4-A to TB12-Y4.
26. Attach wire 240/Y from CR1-5 to LOR1-1-7.
27. Attach wire 244/O from CR2-5 to LOR1-2-9.
28. Attach wire 839/PR from CR3-5 to LOR2-1-7.
29. Attach wire 248/GY from CR4-5 to LOR2-2-9.
30. Attach wire 252/R from CL01 to MR-7.
FIGURE 4 : NEW LOW VOLTAGE CONTROL COMPONETS

530.70-N1.11Y
Unitary Products Group 5
31. Attach wire 816/R from MR-7 to 8T-2.
32. Attach wire 201/R from 8T-1 to 30FU.
33. Attach wire 204/BR to the new location on 8T-2.
34. Attach wire 257/Y from APS-N0 to CR1-7.
35. Attach wire 817/Y from CR1-7 to CR2-7.
36. Attach wire 818/Y from CR2-7 to CR3-7.
37. Attach wire 819/Y from CR3-7 to CR4-7.
NOTE: IF UNIT HAS OPTIONAL HEAT PLEASE CONTINUE
WITH STEP 38.
UNITS W/O ECONOMIZER AND OPTIONAL GAS OR
ELECTRIC HEAT
Units with optional Gas or Electric heat should follow the
steps below. See Figure 7 for Gas Heat and Figure 8 for
Electric Heat.
NOTE: This wire will be used with the new controls.
38. Mount WR1 & WR2 relays in the heat section.
39. Attach wire 526/R to the new location on 8T-7.
40. Attach wire 845/W from TB12-W1 to WR1-A.
41. Attach wire 844/GY from TB12-W2 to WR2-A1.
42. Attach wire 820/Y from CR4-7 to WR1-7.
43. Attach wire 823/Y from WR1-7 to WR2-71.
44. Attach wire 826/BR from WR1-B to WR2-B1.
45. Attach wire 822/BR from WR1-B to TB2.
46. Attach wire 512/W to the new location at WR1-5.
47. Attach wire 510/GY to the new location at WR2-51.
48. Attach wire 533/GY to the new location on TB12-G.
END OF INSTALLATION FOR CV UNIT WITHOUT ECONO-
MIZER.
1. Only on units with 480 and 780 MBH gas unit or with
80kW and 180kW electric heat.

530.70-N1.11Y
6Unitary Products Group
FIGURE 5 : CONSTANT VOLUME UNIT WITHOUT A ECONOMIZER WIRING DIAGRAM

530.70-N1.11Y
Unitary Products Group 7
FIGURE 6 : CONSTANT VOLUME UNIT W/O ECONOMIZER WIRING DIAGRAM

530.70-N1.11Y
8Unitary Products Group
FIGURE 7 : COOLING UNIT WITH ELECTRIC HEAT DIAGRAM AND WITHOUT ECONOMIZER

530.70-N1.11Y
Unitary Products Group 9
FIGURE 8 : CV UNIT WITH GAS HEAT AND WITHOUT ECONOMIZER WIRING DIAGRAM

530.70-N1.11Y
10 Unitary Products Group
CV UNITS WITH ECONOMIZER
The new thermostat requires a thermostat cable with a mini-
mum of 10 conductors that run from the sub-base to the con-
trol box. The new wire will be connected as shown in Figure
3.
1. Locate the W7400 control module in the electric/control
panel (See Figure 1).
2. Remove the following wires from the W7400 control
module:
• 254/GY
• 250/PR
• 202/R
• 294/R
• 230/R
• 240/Y
• 244/O
• 246/PR
• 248/GY
• 201/R
• 252/Y
• 257/Y
• 208/BR
• 307/O
• 318/O
3. Disconnect wire 204/BR from the TR terminals on the
W7400 control module.
NOTE: This wire will be used with the new control.
4. Disconnect thermostat wire from terminals 1-4 on the
W7400 control module.
TABLE 4: PARTS SUPPLIED FOR CV UNITS W/
ECONOMIZER
QTY PART NO. DESCRIPTION
1 373-18641-653
201/R
816/R
252/R
1 373-18641-654
257/Y
817/Y
818/Y
819/Y
1 373-18641-655
307/O
318/O
828/O
1 373-18641-658
842/BR
814/BR
813/BR
812/BR
811/BR
843/BR
841/BR
1 AB008RED7171230 230/R
1 AB024ORN7171244 244/O
1 AB027GRA7171248 248/GY
1 AB020RED5471250 250/R
1 AB022GRA7171800 800/GY
1 AB007YEL7171801 801/Y
1 AB007ORN7171802 802/O
1 AB009PRP7171803 803/PR
1 AB016PRP7171809 809/PR
1 AB012GRA7171821 821/GY
1 AB018BRN7171836 836/BR
1 AB126RED711L837 837/R
1 AB027PRP7171839 839/PR
TABLE 5: PARTS SUPPLIED FOR CV UNITS W/
OPTIONAL HEAT
QTY PART NO. DESCRIPTION
1 373-18689-610 820/Y
823/Y
1 373-18689-611 822/BR
826/BR
1 AB144GRA7171844 844/GY
1 AB144WHT7171845 845/W
2 024-24116-000 Isolation Relay
OPEN ALL DISCONNECTS BEFORE SERCIV-
ING THIS UNIT.