Honeywell Q674F Manuel d'utilisateur télécharger pdf

X-XX UL

INSTALLATION INSTRUCTIONS

T874G,R Multistage Heat Pump Thermostats

and Q674F,J,L Subbases

APPLICATION

The T874G,R Thermostats with Q674F,J,L Subbases

provide 24 to 30 Vac control of a two-stage heating/one-

stage cooling heat pump system. See Table 1 for

thermostat/subbase specifications.

Table 1. Thermostat/Subbase Specifications.

Switching

Thermostat/Subbase System Fan Changeover

T874G/Q674F OFF-EM.HT.-HEAT-AUTO-COOL AUTO-ON Auto and Manual

T874G/Q674J EM.HT.-AUTO-OFF AUTO-ON Auto

T874R/Q674L EM.HT.-HEAT-OFF-COOL AUTO-ON Manual

OPERATION

On a two-heat thermostat, the two stages of heat

make

sequentially as the temperature drops.

Make

refers to the

mercury switch initiating a call for heat or cool.

There are about 2°F (1°C) between stages so that the

second stage makes only when the first stage cannot

handle the load. This is the

interstage differential

LEDs (light emitting diodes) are included on your subbase.

Refer to the list below for specific meaning.

The CHECK LED lights when something needs to be

checked or done to maintain efficient operation of the

system. See your heating system instructions for the

specific meaning.

The SYSTEM LED lights when the system is calling for

heating or cooling.

The AUX. HT. LED lights when the auxiliary heat (second

stage) is operating. Auxiliary heat operates when the heat

pump alone cannot handle the load.

The EM. HT. LED lights when the system switch is placed

in the EM. HT. position. Emergency heat is operating; in

most systems, the compressor has failed and the heat

pump is not operating.

LEDs are not field replaceable or addable.

RECYCLING NOTICE

This control contains mercury in a sealed tube. Do

not place the control in the trash at the end of its

useful life.

If this control is replacing a control that contains

mercury in a sealed tube, do

not

place your old

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.

INSTALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow

them could damage the product or cause a

hazardous condition.

2. Check the ratings given in the instructions and on

the product to make sure the product is suitable for

your application.

3. Installer must be a trained, experienced service

technician.

4. After installation is complete, check out product

operation as provided in these instructions.

69-0268-11

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Résumé du contenu

Page 1 - RECYCLING NOTICE

Page 2 - Wiring the Subbase

69-0268—1110T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESM1627ARWEXL1(HOT)L2COOLEM. HT.HEATSYSTEMSWITCHAUTOONFANSWITCH1 POWER SUPPLY

Page 3 - HT. LEDs

69-0268—1111T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESTHERMOSTATMOUNTING POST (2)M326650 60 70 80HEATTHERMOSTATMOUNTING

Page 4

69-0268—1112T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESHome and Building ControlHoneywell Limited-Honeywell Limitée35 Dynamic Driv

Page 5

69-0268—112T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESCAUTION1. Disconnect power supply to prevent electricalshock or equipment da

Page 6

69-0268—113T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESH1FALLRISECOL1 (HOT)L213C1RISE1223POWER SUPPLY. PROVIDE DISCONNECT MEANS AND

Page 7

69-0268—114T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESH1FALLH2FALLCORISEC1RISEL1 (HOT)L21212POWER SUPPLY. PROVIDE DISCONNECT MEANS

Page 8

69-0268—115T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESH2FALLH1FALLC1L1 (HOT)L21221POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERL

Page 9 - Mounting the Thermostat

69-0268—116T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESH2FALLH1FALLC1L1 (HOT)L21122POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERL

Page 10 - Fig. 13. Wiring connections

69-0268—117T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESH1FALLCL1 (HOT)L21EM. HT.LED (RED)AUX. HT.LED (GRN)W3OLGRW2EXX2BW1YAUX. HT.

Page 11 - CALIBRATION

69-0268—118T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESM5072A(HOT) L1 L21LACOCHPYBEOGLXW2W3RODT 1RTD 1 EHR 1RTD 2ODT 2EHR 2 RTD 3R

Page 12 - 69-0268—11

69-0268—119T874G,R MULTISTAGE HEAT PUMP THERMOSTATS AND Q674F,J,L SUBBASESFig. 10. Internal schematic and typical wiring diagram for T874R/Q674L in he