Страница 1: ...d control in the trash Contact your local waste management authority for instructions regarding recycling and the proper disposal of this control or of an old control containing mercury in a sealed tube If you have questions call Honeywell at 1 800 468 1502 M3375 Installation Instructions for the Trained Service Technician TABLE 1 THERMOSTAT SUBBASE AND SYSTEM COMPATIBILITY Thermostat Application ...
Страница 2: ...irectly on the wall 1 To mount on a horizontal outlet box install the sub base on the outlet box as shown in Fig 1 For a wall installation hold the subbase in position and mark holes for the anchors Fig 2 Obtain wall anchors locally Take care that the wires do not fall back into the wall opening Set aside subbase Drill two 3 16 in 4 8 mm holesandgentlytapanchorsintotheholesuntilflushwiththe wall 2...
Страница 3: ...mostat Q674B D Subbase in single stage heating cooling two zone system POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED ZONE 1 O AND B TERMINALS MUST BE CONNECTED FOR PROPER SYSTEM OPERATION JUMPER RC AND RH TERMINALS TOGETHER AND WIRE AS SINGLE R TERMINAL DO NOT CONNECT W2 AND Y2 TERMINALS TO CONTROL PANEL 1 1 M1633 HEAT RELAY COOL RELAY ZONE 1 RELAY ZONE 2 RELAY Y2 Y1 O ...
Страница 4: ...ult Fig 7 Typical hookup for MABS II and MABS II L Control Panels with T874A Thermostat Q674B D Subbases in single stage heating cooling zone system MABS II Control Panel shown MABS II L Control Panel hookup is the same 4 M1634 Y 2 1 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED JUMPER RC RH TOGETHER AND WIRE AS SINGLE R TERMINAL ZONE 1 O AND B TERMINALS MUST BE CONNECT...
Страница 5: ...G DO NOT CONNECT W2 Y1 O G2 G1 RC RH B W2 W1 E ADD A ZONE EM HEAT RELAY SECOND STAGE RELAY FAN RELAY HEAT RELAY COOL RELAY CAC RELAY ZONE 1 RELAY ZONE 2 RELAY ZONE 3 RELAY A4 A3 A2 A1 T8 T7 T6 T5 T4 M6 M4 M1 ZONE 3 T8 T7 T6 T5 T4 M6 M4 M1 ZONE 2 T8 T7 T6 T5 T4 M6 M4 M1 ZONE 1 O1 G1 B1 E1 2 1 CHANGEOVER CONTROL COOL FAN HEAT EM HEAT 24 V 40 VA TRANSFORMER 4 5 6 Z DAMPER ACTUATOR 1 2 3 X 4 5 6 Z DAM...
Страница 6: ...T HAS R RC RH TERMINALS JUMPER TOGETHER AND WIRE AS SINGLE R TERMINAL DO NOT CONNECT THERMOSTAT O AND B TERMINALS TO CONTROL PANEL 2 ZONE 1 ZONE 2 ZONE 3 O B RC RH 1 2 G Y R W M6 M4 M1 VO VC ZONE 1 G Y R W M6 M4 M1 VO VC ZONE 2 G Y R W M6 M4 M1 VO VC ZONE 3 OPEN CLOSE DAMPER ZONE SYS ZONE 1 OPEN CLOSE DAMPER ZONE SYS ZONE 2 OPEN CLOSE DAMPER ZONE SYS ZONE 3 FAN FAN FAN G Y1 Y2 R W1 W2 O T874A THER...
Страница 7: ...r ...
Страница 8: ...Settings ...
Страница 9: ...set it to ON See Fig 13 After 30 seconds place your hand in front of an air register in that zone to check for air flow at the register 2 Reset fan switch if provided to AUTO After 30 sec onds make sure air flow at register has stopped 3 Move heating set point lever on zone thermostat 10 F 6 C above room temperature to call for heat 4 After 30 seconds longer if necessary for time delay on plenum f...
Страница 10: ...eter to sense the area temperature compare the readings Be care ful not to touch the thermometer or breathe on it 4 If the readings are the same replace the cover and put the system into operation 5 If the readings are different insert a small screw driver in the thermometer slot Fig 14 and turn it until the thermometers have the same reading 6 Replace the thermostat cover and put the system into ...
