Honeywell Q674B Manual do Utilizador descarregar pdf

X-XX UL

INSTALLATION INSTRUCTIONS

T874H,Q,W Multistage Thermostats and

Q674B,C,G,L Subbases

APPLICATION

The T874H,Q,W Multistage Thermostats provide 24 to 30

Vac control for heating and cooling systems as listed in

Table 1.

Table 1. Heating and Cooling Stages.

Plus a changeover stage that operates with cooling.

The Q674B,C,G,L Subbases provide wiring terminals,

system and fan switching, and mounting bases for T874

Multistage Thermostats as listed in Table 2.

Table 2. Switching Positions.

OPERATION

On a two-stage or three-stage heat thermostat, the 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 the stages so that the

second stage makes only when the first stage can not

handle the load. About one degree later, the third stage

makes (T874W only). This degree difference is called the

interstage differential

Select models include LEDs (light-emitting diodes). The

LED lights to indicate a problem with the system; refer to

the system manufacturer instructions.

When an LED lights, refer to this list for the meaning:

FILTER: clogged filter needs replacement.

EM. HT.: emergency heat is operating. The compressor

has failed, and the heat pump is not operating. The

LED lights when the homeowner places the system

switch in the EM. HT. position.

AUX. HT.: auxiliary heat is operating because the

weather is so cold that the heat pump alone cannot

handle the load.

SERVICE or CHECK: system needs to be checked.

See heating system instructions for specific

meaning.

LEDs are not field addable or replaceable.

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 the recycling and the proper

disposal of this control, or of an old control

containing mercury in a sealed tube.

INSTALLATION

When Installing this Product…

 Read these instructions carefully. Failure to follow

them could damage the product or cause a hazard-

ous condition.

 Check the ratings given in the instructions and on

the product to make sure the product is suitable for

your application.

 Installer must be a trained, experienced service

technician.

 After installation is complete, check out product

operation as provided in these instructions.

69-0087-6

T874 Model

Stage H

Heating Stages 1 1 3

Cooling Stages 1 — 2

Q674

Switch Positions

Model

System Fan

B Heat-Off-Cool Auto-On

C Off-Auto Auto-On

G Off-Auto None

L Em Ht-Heat-Off-Cool Auto-On

1 2 3 4 5 6 7 8

Resumo do Conteúdo

Página 1 - Q674B,C,G,L Subbases

Página 2 - Location

69-0087—62T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASESM6009VERTICAL OUTLETBOXADAPTERRINGCOVER PLATEMOUNTINGSCREWS (2)1SUBBASESUBBASEMOUNT

Página 3 - 69-0087—6

69-0087—63T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASESFOR STRAIGHTINSERTION–STRIP 5/16 in. (8 mm)FOR WRAPAROUND–STRIP 7/16 in. (11 mm)SUB

Página 4

69-0087—64T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASESL21OFFH1 ANTICIPATORH2 ANTICIPATORH11POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OV

Página 5

69-0087—65T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASES1L1(HOT)L2TW3UGRELXBOY1Y2C815A OD THERMISTORAUX. HEAT RELAYFAN RELAYEM. HEAT RELAYC

Página 6 - Mounting the Thermostat

69-0087—66T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASESFig. 9. T874W/Q674L for three-stage heat and two-stage cool with outdoor reset.1TW3

Página 7 - CHECKOUT

69-0087—67T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASESTHERMISTOR RESISTANCEC815A THERMISTOR RESISTANCER = 400 ohms ± 10% AT 77°F (25°C)46

Página 8 - CALIBRATION

69-0087—68T874H,Q,W MULTISTAGE THERMOSTATS AND Q674B,C,G,L SUBBASESHoneywell Limited-Honeywell Limitée35 Dynamic DriveScarborough, OntarioM1V 4Z9Autom

Comentários a estes Manuais

Sem comentários

Honeywell Q674B Manual do Utilizador

Consulte online ou descarregue Manual do Utilizador para Termóestatos Honeywell Q674B. Honeywell Q674B User's Manual Manual do Utilizador

Resumo do Conteúdo

Comentários a estes Manuais

Manuais e produtos relacionados com Termóestatos Honeywell Q674B