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Honeywell Super Tradeline Q674F, Installation Instructions Manual

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Honeywell Super Tradeline Q674F Installation Instructions Manual Download Page 4

60-1147-4

4

Fig. 6—Internal schematic and typical wiring diagram for T874N and Q674F.

L1 
HOT

L2

1

W1

W2

EM. HEAT
LED (RED)

CHECK

LED 

(GREEN)

FAN RELAY

G

EM. HEAT 
RELAY

COMPRESSOR 
CONTACTOR

Y

E

SYSTEM
SWITCH

EM. HT.

HEAT

OFF

COOL

H1
ANTICIPATOR

H1

H2

H2
ANTICIPATOR

1

POWER SUPPLY.  PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.

M3686

FALL

R

RISE

L

C1

HEAT 
RELAY 3

EM.HT. RELAY
CONTACT

OUTDOOR
THERMOSTAT

AUTO

ON

FAN SWITCH

X

W3

OPTIONAL 
COMPRESSOR
FAILURE DEVICE

DEFROST 
RELAY

REVERSING 
VALVE

EM.HT. RELAY
CONTACT

HIGH 
PRESSURE
SWITCH

HEAT 
RELAY 1

HEAT 
RELAY 2

AUTO

FALL

C0

C1
ANTICIPATOR

Summary of Contents for Super Tradeline Q674F

Page 1: ...sedamagetosubbasethreads may result 4 Do not short across coil terminals on the relay This may burn out the thermostat heat anticipator IMPORTANT Thermostats are calibrated at the factory using subbases mounted at true level An inaccurately leveled subbase will cause thermostat control devia tion Operation On a two heat thermostat the two stages of heat make sequentially as the temperature drops M...

Page 2: ...tain wall anchors locally Take care that the wires do not fall back into the wall opening Set aside subbase Drill four 3 16 in 4 8 mm holes and gently tap anchors into the holes until flush with the wall 2 Pullwiresthroughthecoverplate ifused andsubbase cable opening Fig 3 3 Secure the cover plate if used and subbase with the screws provided Do not fully tighten the subbase screws 4 Levelthesubbas...

Page 3: ...nsert is com pletelyseatedinrecessedarea Letsetpointscalepopback and set levers to desired positions FOR STRAIGHT INSERTION STRIP 5 16 in 8 mm FOR WRAPAROUND STRIP 7 16 in 11 mm SUBBASE TERMINAL SCREW M928 BARRIER Fig 5 Internal schematic and typical wiring diagram for T874N and Q674C M1860 G R W2 X L1 HOT L2 AUTO SYSTEM SWITCH AUTO ON FAN SWITCH 1 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOA...

Page 4: ...ITCH EM HT HEAT OFF COOL H1 ANTICIPATOR H1 H2 H2 ANTICIPATOR 1 POWER SUPPLY PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED M3686 FALL R RISE L C1 HEAT RELAY 3 EM HT RELAY CONTACT OUTDOOR THERMOSTAT AUTO ON FAN SWITCH X W3 OPTIONAL COMPRESSOR FAILURE DEVICE DEFROST RELAY REVERSING VALVE EM HT RELAY CONTACT HIGH PRESSURE SWITCH HEAT RELAY 1 HEAT RELAY 2 AUTO FALL C0 C1 ANTICIPATOR ...

Page 5: ...rmostat base and note the spring fingers that engage the subbase contacts Make sure the spring fingersarenotbentflat Flatfingerspreventproperelectrical contact with the subbase 5 Set the second stage heat anticipation indicator to match the current rating of the controlled equipment See Heat Anticipator Setting section The first stage heat antici pator and the cooling anticipator are nonadjustable...

Page 6: ... COOLING SET POINT LEVER THERMOMETER WHEN PROVIDED FAN SWITCH SYSTEM SWITCH OPTIONAL LED ENUNCIATION XXX XXXX XXXX XXXX XXX XXXX The T874N has separate heating and cooling set point levers the T874R has one set point lever for heating and cooling Move the heating and cooling set point levers Fig 10 to the desired comfort positions The minimum differen tialbetweenheatingandcoolingsetpointis3 F 2 C ...

Page 7: ...h to AUTO In this position fan operation is controlled by the heating or cooling system control circuit Calibration THERMOSTAT T874Thermostatsareaccuratelycalibratedatthefactory They do not have provision for field calibration THERMOMETER The thermometer in your thermostat has been accurately calibrated at the factory The thermometer should need adjustment only if it has been dropped or shifted du...

Page 8: ...ited Honeywell Limitée 35 Dynamic Drive Scarborough Ontario M1V 4Z9 60 1147 4 S M Rev 5 93 Automation and Control Solutions Honeywell International Inc 1985 Douglas Drive North Golden Valley MN 55422 www honeywell com yourhome ...

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