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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.