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ZONEBB3Z(AC/HP)01: Quick Reference Guide

Manufacturer reserves the right to change, at any time, specifications and designs without notice and without obligations.

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Fig. 3 – Wiring Diagram for Installation of Thermostats

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Fig. 4 – Installing Dampers

Step 4 – Install Barometric Bypass Damper

The barometric bypass damper is a critical part of Bryant 3-Zone System

for controlling noise at minimum airflow. A barometric bypass should be

installed unless the duct work and indoor unit have been sized for use

without a bypass. When a direct bypass (outlet air fed back directly into

the  return)  is  used,  bypassing  decreases  entering  air  temperature  in

cooling and increases it in heating. Excessive bypassing will lead to limit

trips,  either  through  the  LAT/HPT  sensor  or  the  equipment  internal

limits.

Step 5 – Install Leaving Air Temperature (LAT) Sensor 

/ Heat Pump Temperature (HPT) Sensor (optional)

The Leaving Air Temperature (LAT) sensor is used to detect a cooling

overload condition and  is connected  to the LAT  and LATC  terminals.

Polarity does not matter. Locate LAT sensor in main supply trunk after

heating  and  cooling  coil  and  before  bypass  damper  and  first  branch.

Cycling  on  internal  equipment limits is  to be avoided because it  over

stresses and can shorten the life of the equipment. The LAT limit setting

should be selected to trip below the equipment limit.

Fig. 5 – Leaving Air Temperature (LAT) Sensor / Heat Pump 

Temperature (TPT) Sensor optional

The  HPT  sensor  is  used  with  ZONEBB3ZHP01  to  detect  a  cooling

overload condition and is connected to the HPT and HPTC terminals.

The HPT sensor will also be  monitored in heating  to detect  a  heating

overload condition at the coil with a shutdown temperature of 115°F. It

can  be  installed  through  the  wall  of  the  fan  coil  or  may  be  located

entirely inside the fan coil near the blower inlet being careful that it does

not interfere with the blower wheel. If the HPT sensor is not used, the

10K ohm resistor attached to the 2 HPT terminals on the board must be

left in place.  

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Zone 1

Thermostate Wiring 

Example

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Zone 2

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Содержание bryant ONEBB3ZAC01

Страница 1: ... hr cph providing maximum equipment protection Selection Jumpers Designed for easy configuration Additional Options Timeguard override Compressor protection Modulating damper control in emergency situations Damper fuse protection High and low temperature limits Auto changeover from any zone RH and RC for voltage isolation Bypass setup routine Staging time for energy savings Automatic checkout with...

Страница 2: ...stem The Bryant 3 Zone System can be mounted in either vertical or horizontal position near the HVAC system inside the home It is designed so that wires can enter it from behind above or below Plan wire routing before mounting Fig 2 Mounting the System 1 Remove the front cover from the base and use the base as a template to mark drilling locations on the wall stud or roof truss 2 Mount using 4 scr...

Страница 3: ... detect a cooling overload condition and is connected to the LAT and LATC terminals Polarity does not matter Locate LAT sensor in main supply trunk after heating and cooling coil and before bypass damper and first branch Cycling on internal equipment limits is to be avoided because it over stresses and can shorten the life of the equipment The LAT limit setting should be selected to trip below the...

Страница 4: ...tion Default OFF Optional Settings 1 Auto changeover time between heating and cooling or vice versa Auto changeover time ENABLED OFF Auto changeover time DISABLED 2 Together with dipswitch 3 determines chanegover time 20 minutes auto changeover time OFF 30 minutes auto changeover time ON 3 Multiplier for the modified time set on dipswitch 2 1 0 multiplier OFF 0 5 multiplier ON 4 Installer Test Mod...

Страница 5: ...N R C Y Y2 G Rz C REV VALVE R C Y1 G W1 Y2 W2 O SWITCH 9 OFF SWITCH 10 OFF Rh Y1 G W1 Y2 W2 O R C Y G C Y Rc O O W R HP 2S 3 ZONE CONTROL ZONE 1 INPUT ZONE 1 2SACTS TAT EQIUPMENT PO WE R FURNACE OR FAN COIL LO COOL LO HEAT FA N R C G Rz C HI HEAT R C Y1 G W1 Y2 W2 O SWITCH 9 ON SWITCH 10 ON Rh Y1 G W1 Y2 W2 O R C Y1 G C Y1 Rc R Y Y2 HI COOL Y2 W2 Y2 2 SPEED AIR CONDITIONER HP 2S3 ZONECONTROL ZONE ...

Страница 6: ...d designs without notice and without obligations 6 Training My Learning Center is your central location for professional residential HVAC training resources that help strengthen careers and businesses We believe in providing high quality learning experiences both online and in the classroom Access My Learning Center with your HVACpartners credentials at www mlctraining com Please contact us a myle...

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