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
10.Using the four drill screws secure the back plate to the
11.Locate the packet of wires marked with “Economizer”.
12.Attach thermostat wires to new location TB12 (See Figure 3).
For steps
13.Attach wire 230/R from
14.Attach wire 836/BR from TB2 to
15.Attach wire 842/BR from
16.Attach wire 814/BR from
17.Attach wire 813/BR from
18.Attach wire 812/BR from
19.Attach wire 811/BR from
20.Attach wire 843/BR from
21.Attach wire 841/BR from
22.Attach wire 800/GY from
23.Attach wire 801/Y from
24.Attach wire 802/O from
25.Attach wire 803/PR from
26.Attach wire 821/GY from
27.Attach wire 809/PR from
28.Attach wire 240/Y from
29.Attach wire 244/O from
30.Attach wire 839/PR from
31.Attach wire 248/GY from
32.Attach wire 252/R from CLO1 to
33.Attach wire 816/R from
34.Attach wire 257/Y from
35.Attach wire 201/R from
36.Attach wire 817/Y from
37.Attach wire 818/Y from
38.Attach wire 819/Y from
39.Attach wire 204/BR to the new location on
40.Attach wire 828/O from
41.Attach 318.O from
42.Attach 307/0 from
43.Disconnect wire 239/R from
NOTE: This wire will be used with the new controls.
44.Attach wire 239/R to the new location on
45.Attach wire 837/R from
46.Attach wire 250/R from
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
49.Attach wire 845/W from
50.Attach wire 844/GY from
51.Attach wire 510/GY to the new location at
52.Attach wire 823/Y from
53.Attach wire 826/BR from
54.Attach wire 822/BR from
55.Attach wire 512/W to the new location at
56.Attach wire 533/GY to the new location on
57.Attach wire 820/Y from
1.Only on units with 480 and 700 MBH gas heat or units with 80kW and 180kW electric heat.
Unitary Products Group | 11 |