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MILLENNIUM™ ROOFTOP
INSTALLATION
CONTROLS UPGRADE FROM STYLE A TO
INSTRUCTION
STYLE C
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 . . . . .
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530.70-N1.11Y TABLE 2: PARTS SUPPLIED FOR CV UNITS W/O DESCRIPTION 1 ECONOMIZER The installation of this kit (2RT04701A) replaces the W7400 module and will obsolete the T7400 thermostat. A new ther- QTY PART NO. DESCRIPTION mostat will be required to operate the unit. 201/R This kit contains all necessary electrical components, sheet- 1 373-18641-653 816/R metal parts, and wires to replace the W7400 module and the T7400 thermostats used in all Constant Volume 30-40 Ton 252/R Millennium Style A
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530.70-N1.11Y TABLE 3: PARTS SUPPLIED FOR CV UNITS WITH OPTIONAL HEAT QTY PART NO. DESCRIPTION 820/Y 1 373-18689-610 823/Y 822/BR 1 373-18689-611 826/BR 1 AB144GRA7171844 844/GY 1 AB144WHT7171845 845/W 2 024-24116-000 Isolation Relay FIGURE 3 : TYPICAL THERMOSTAT WIRING OPEN ALL DISCONNECTS BEFORE SERVIC- ING THIS UNIT. 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 Fi
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530.70-N1.11Y FIGURE 4 : NEW LOW VOLTAGE CONTROL COMPONETS 5. Disconnect wire 526/R from the 30FU location. 14. Attach wire 836/BR from TB2 to 8T-6. NOTE: This wire will be used with the new controls. 15. Attach wire 842/BR from 8T-6 to MR-B. 16. Attach wire 814/BR from MR-B to CR1-B. 6. Disconnect wire 533/GY from the W7400 control module G terminal. 17. Attach wire 813/BR from CR1-B to CR2-B. 7. Disconnect wires 510/GY and 512/w from W1 & W2. 18. Attach wire 812/BR from CR2-B to CR3-B. NOTE:
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530.70-N1.11Y 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 st
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530.70-N1.11Y FIGURE 5 : CONSTANT VOLUME UNIT WITHOUT A ECONOMIZER WIRING DIAGRAM 6 Unitary Products Group
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530.70-N1.11Y FIGURE 6 : CONSTANT VOLUME UNIT W/O ECONOMIZER WIRING DIAGRAM Unitary Products Group 7
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530.70-N1.11Y FIGURE 7 : COOLING UNIT WITH ELECTRIC HEAT DIAGRAM AND WITHOUT ECONOMIZER 8 Unitary Products Group
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530.70-N1.11Y FIGURE 8 : CV UNIT WITH GAS HEAT AND WITHOUT ECONOMIZER WIRING DIAGRAM Unitary Products Group 9
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530.70-N1.11Y TABLE 5: PARTS SUPPLIED FOR CV UNITS W/ CV UNITS WITH ECONOMIZER OPTIONAL HEAT TABLE 4: PARTS SUPPLIED FOR CV UNITS W/ QTY PART NO. DESCRIPTION ECONOMIZER 820/Y QTY PART NO. DESCRIPTION 1 373-18689-610 823/Y 201/R 1 373-18641-653 816/R 822/BR 1 373-18689-611 252/R 826/BR 257/Y 1 AB144GRA7171844 844/GY 817/Y 1 AB144WHT7171845 845/W 1 373-18641-654 818/Y 2 024-24116-000 Isolation Relay 819/Y 307/O 1 373-18641-655 318/O 828/O 842/BR 814/BR OPEN ALL DISCONNECTS BEFORE SERCIV- 813/BR
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530.70-N1.11Y NOTE: Steps 6 through 8 are for optional heat only. 36. Attach wire 817/Y from CR1-7 to CR2-7. 37. Attach wire 818/Y from CR2-7 to CR3-7. 5. Disconnect wire 526/R from the 30FU location. 38. Attach wire 819/Y from CR3-7 to CR4-7. 6. Disconnect wire 512/W and 510/GY from the W7400 control module W1 and W2 terminals. 39. Attach wire 204/BR to the new location on 8T-2. NOTE: This wire will be used with the new controls. 40. Attach wire 828/O from RY2-A to OR-2-2. 41. Attach 318.O fro
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530.70-N1.11Y FIGURE 9 : CONSTANT VOLUME UNIT WITH ECONOMIZER WIRING DIAGRAM 12 Unitary Products Group
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530.70-N1.11Y FIGURE 10 : CONSTANT VOLUME UNIT WITH ECONOMIZER CONNECTION DIAGRAM Unitary Products Group 13
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530.70-N1.11Y FIGURE 11 : CV UNIT WITH GAS HEAT AND ECONOMIZER WIRING DIAGRAM 14 Unitary Products Group
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530.70-N1.11Y FIGURE 12 : UNIT WITH ECONOMIZER AND ELECTRIC HEAT WIRING DIAGRAM Unitary Products Group 15
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Subject to change without notice. Printed in U.S.A. Copyright © by YORK Unitary Products 1999. All rights reserved. Supersedes: Nothing 530.70-N1.11Y (799) YORK 5005 Norman Unitary YORK OK Products Drive 73069
