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Honeywell T7351 Manual De Usuario

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T7351 COMMERCIAL PROGRAMMABLE THERMOSTAT
62-0258
10
Options Utilizing Auxiliary Output
There are two dehumidification options that utilize the 
auxiliary output. They are:
— Simple Dehumidification.
— Hot Gas Bypass Dehumidification.
Simple Dehumid(ification)
The auxiliary output:
— Energizes when RH rises above humidity high limit.
— De-energizes when RH drops below humidity high 
limit.
NOTES:
—
Hysteresis and a minimum timer prevent 
short cycling of this output.
—
Unlike Dehumid Hot Gas BP the relay 
remains energized during calls for multiple 
cooling stages.
Dehumid Hot Gas BP
The auxiliary output operates as shown in Table 6.
Table 6. Hot Gas Bypass Dehumidification Logic.
Auxiliary output during call for multiple cooling stages for 
two reasons:
1. This method assumes that the cooling provides 
dehumidification.
2. Multiple cooling stages probably provide necessary 
dehumidification.
3. Hysteresis and a minimum timer prevent short 
cycling of this output.
WIRING DIAGRAMS
Fig. 7. Typical hookup of T7351F2010 in two-stage heat and two-stage cool heat pump system with two 
transformers.
Fig. 8. Typical hookup of T7351F201U in two-stage heat and four-stage cool conventional system.
Humidity
Cooling Stages Active Auxiliary Output
High
more than one
De-energized
High
one or less
Energized
Low
more than one
De-energized
Low
one or less
De-energized
POWER SUPPLY.  PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
WHEN INSTALLED ON A SYSTEM WITH TWO TRANSFORMERS, REMOVE THE FACTORY-INSTALLED JUMPER.
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
1
M25324
2
2
3
RC
X
SUBBASE
W1
G
T7770 REMOTE SENSOR
Y1
W2
Y2
AUX
RH
T5
T6
T7
T4
T3
DISCHARGE
AIR
SENSOR
OUTDOOR
AIR
SENSOR
OS
OS
AS
AS
1
3
L1
(HOT)
L2
1
L1
(HOT)
L2
COMPRESSOR
CONTACTOR 1
COMPRESSOR
CONTACTOR 2
HEATING 
TRANSFORMER
COOLING
TRANSFORMER
HEAT
RELAY 1
1
2
3
4
5
6
7
8
9
FAN
RELAY
ECONOMIZER
HEAT
RELAY 2
MOTION
SENSOR
HUMIDITY
SENSOR
M
M
HC
HP
HS
POWER SUPPLY.  PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
ENSURE TRANSFORMER IS SIZED TO HANDLE THE LOAD.
HEAT/COOL SYSTEMS WITH ONE TRANSFORMER REQUIRE THE FACTORY-INSTALLED JUMPER.
USE ECONOMIZER INSTRUCTIONS FOR INSTALLATION DIRECTIONS.
1
M19768A
2
3
2
3
4
RC
X
SUBBASE
W1
G
T7770 REMOTE SENSOR
Y1
W3/Y4 Y3
W2
Y2
AUX
RH
T5
T6
T7
T4
T3
DISCHARGE
AIR
SENSOR
OUTDOOR
AIR
SENSOR
MOTION
SENSOR
HUMIDITY
SENSOR
M
OS
OS
AS
AS
M
HC
HP
HS
1
4
L1
(HOT)
L2
COMPRESSOR
CONTACTOR 1
COMPRESSOR
CONTACTOR 2
HEAT
RELAY 1
1
2
3
4
5
6
7
8
9
FAN
RELAY
ECONOMIZER
HEAT
RELAY 2
COMPRESSOR
CONTACTOR 3
COMPRESSOR
CONTACTOR 4