York MILLENNIUM STYLE A, Installation Instruction

Page: 11 / 16

530.70-N1.11Y
Unitary Products Group 11
NOTE: Steps 6 through 8 are for optional heat only.
5. Disconnect wire 526/R from the 30FU location.
6. Disconnect wire 512/W and 510/GY from the W7400
control module W1 and W2 terminals.
NOTE: This wire will be used with the new controls.
7. Disconnect wire 533/GY from the W7400 G terminal.
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 Figures 2 and 4.
10. Using the four drill screws secure the back plate to the
box-electric.
11. Locate the packet of wires marked with “Economizer”.
12. Attach thermostat wires to new location TB12
(See Figure 3).
For steps 13-43 see Figures 9 and 10.
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 811/BR from CR3-B to CR4-B.
20. Attach wire 843/BR from CR4-B to OR-B.
21. Attach wire 841/BR from OR-B to TB12-C.
22. Attach wire 800/GY from MR-A to TB12-G.
23. Attach wire 801/Y from CR1-A to TB12-Y1.
24. Attach wire 802/O from CR2-A to TB12-Y2.
25. Attach wire 803/PR from CR3-A to TB12-Y3.
26. Attach wire 821/GY from CR4-A to TB12-Y4.
27. Attach wire 809/PR from TB12-A1 to OR-A.
28. Attach wire 240/Y from CR1-5 to LOR1-1-7 .
29. Attach wire 244/O from CR2-5 to LOR1-2-9.
30. Attach wire 839/PR from CR3-5 to LOR2-1-7.
31. Attach wire 248/GY from CR4-5 to LOR2-2-9.
32. Attach wire 252/R from CLO1 to MR-7.
33. Attach wire 816/R from MR-7 to 8T-1.
34. Attach wire 257/Y from APS-NO to BRI-7.
35. Attach wire 201/R from 8T-1 to 30FU.
36. Attach wire 817/Y from CR1-7 to CR2-7.
37. Attach wire 818/Y from CR2-7 to CR3-7.
38. Attach wire 819/Y from CR3-7 to CR4-7.
39. Attach wire 204/BR to the new location on 8T-2.
40. Attach wire 828/O from RY2-A to OR-2-2.
41. Attach 318.O from RY2-A to RY1-A.
42. Attach 307/0 from R1Y-A to ELM-5.
43. Disconnect wire 239/R from ACT1-24V.
NOTE: This wire will be used with the new controls.
44. Attach wire 239/R to the new location on OR-1-5.
45. Attach wire 837/R from OR-1-7 to ACT1-24V.
46. Attach wire 250/R from ELM-TR to MR-5.
NOTE: IF UNIT HAS OPTIONAL HEAT CONTINUE WITH
STEP 45.
CV UNITS WITH ECONOMIZER AND OPTIONAL
HEAT
See Figure 11 for Gas Heat and Figure12 for Electric Heat.
47. Mount the WR1 and WR2 relays in the heat section.
48. Attach wire 526/R to the new location on 8T-7.
49. Attach wire 845/W from TB12-W1 to WR1-A.
50. Attach wire 844/GY from TB12-W2 to WR2-A
1
.
51. Attach wire 510/GY to the new location at WR2-5
1
.
52. Attach wire 823/Y from WR1-7 to WR2-7
1
.
53. Attach wire 826/BR from WR1-B to WR2-B
1
.
54. Attach wire 822/BR from WR1-B to TB2.
55. Attach wire 512/W to the new location at WR1-5.
56. Attach wire 533/GY to the new location on TB12-G.
57. Attach wire 820/Y from CR4-7 to WR1-7.
1. Only on units with 480 and 700 MBH gas heat or units
with 80kW and 180kW electric heat.