Honeywell TB7100A1000 사용자 설명서

17

63-2675—03

If heat pump or conventional application modes are enabled in 

ISU 170, then ISU 347 is not available for fan ramp algorithm. 

The fan operates as a default ON/AUTO selection that works 

the same way as our CommercialPRO TB7220 thermostat. 

There is only one fan relay output that is activated.

If PTAC or fan coil thermostat application modes are enabled in 

ISU 170, then ISU 347 fan ramp algorithm is available for 

installer setup selection. The fan ramp algorithm will 

automatically calculate the appropriate fan speed that is 

needed to meet the proportional band requirements to speed 

up setpoint satisfaction. When the setpoint is satisfied it will 

revert to the lowest fan speed setting to conserve energy.

The thermostat comes factory default with the fan ramping 

algorithm enabled (ISU 347). This gives the user the ability to 

select Auto-Lo-Med-Hi option in ISU 348 or Auto only option in 

ISU 348. Auto sets the thermostat into the fan ramping 

algorithm mode and automatically sets the sufficient speed for 

PI control. Auto also automatically shuts the fan off when there 

is not a call for heating or cooling. If the user decides to disable 

ISU 347, then the fan will only have Lo-Med-Hi option 

available.

If ISU 347 is not enabled, then ISU 348 does not appear as a 

user selection choice.

If ISU 347 is enabled, then ISU 349 is available as a selection 

choice. The user can select either a 2 hour or 4 hour timer fan 

reset function. The fan will reset from a constant on speed to 

Auto mode after the time period expires. If ISU 347 is not 

enabled, then ISU 349 does not appear as a user selection 

choice.

Heat Pump and conventional use a single fan speed. The 

single fan speed label is the G terminal relay output. Display on 

the thermostat for these modes will give the Fan On/Auto 

option. There is no fan ramping algorithm, ISU 347, 348, 349 

are not available.

PTAC modes 10 and 11 will have the same selection options 

available as the heat pump selection options. The only 

difference is that the PTAC options have a Lo and Hi speed fan 

output instead of single speed output and that it follows the fan 

sequencing described above with ISU 347, 348, 349.

4 pipe is treated similar to 1H/1C conventional. It follows the 

fan sequencing described above with ISU 347, 348, 349.

There are two different 2 pipe modes - 2 pipe only and 2 pipe 

with reheat.

2 pipe only - 2 pipe modes do not contain the ability to have 

automatic changeover. They are manual changeover only. The 

thermostat will have a priority when choosing a system mode 

(heat or cool). When ISU #340 has a 2 pipe changeover 

sensor enabled, the thermostat screen system mode will lock 

on heat or cool (whatever the changeover sensor is 

communicating to the thermostat). If ISU #340 does not have a 

changeover sensor enabled, then the system mode from the 

thermostat screen can manually be adjusted between heat or 

cool. It follows the fan sequencing described above with ISU 

347, 348, 349.

2 pipe with reheat - 2 pipe modes do not contain the ability to 

have automatic changeover. They are manual changeover 

only. The thermostat will have a priority when choosing a 

system mode (heat or cool). When ISU #340 has a 2 pipe 

changeover sensor enabled, the thermostat screen system 

mode will lock on heat only. When the 2 pipe changeover 

sensor is sensing cool mode, the user can adjust to heating 

mode which will bring on the auxiliary heat. If ISU #340 does 

not have a changeover sensor enabled, then the system mode 

from the thermostat screen can manually be adjusted between 

heat or cool. It follows the fan sequencing described above 

with ISU 347, 348, 349.

The thermostat energizes specific terminal(s), depending on 

the demand for heating, cooling or fan. The thermostat screen 

shows the time, inside temperature, system and fan selections. 

Additional indicators are shown when the heating, cooling or 

fan is energized. See Tables 8 and 9 for specification 

information.

a

If Installer Setup System type is set to two stages of cooling.

b

G energizes only if Installer Setup 0180 is set to Electric.

a

Configure O/B in Installer Setup. Based on last piece of 

equipment called (cooling = O; heating = B).

b

If Installer Setup System Type is set to 2Heat/1Cool Heat 

Pump with Auxiliary Heat.

Off

Auto

—

—

—

Cool

Auto

—

—

—

Cool

 or Auto

Auto

Stage 1 

Cooling

Y, G

Cool On

Heat

Auto

—

—

—

Heat

 or Auto

Auto

Stage 1 

Heating

W, G

b

Heat On

Off

Auto

—

O/B

a

—

Cool
Cool

 or Auto

Auto

Stage 1 Cooling

Y, G, O/B

a

Cool On

Heat Auto

—

O/B

a

—

Heat

 or Auto

Auto

Stage 1 Heating

Y, G, O/B

a

Heat On

Stages 1 and 2 

Heating

Y, W1

b

, G, 

O/B

a

Auxiliary 

Heat On