Bryant EVOLUTION V 189BNV 13 Installation Instructions Manual Download Page 16

16

Thermistor Sensor Comparison

The control continuously monitors and compares the outdoor air

temperature sensor and outdoor coil temperature sensor to ensure
proper operating conditions. The comparison is:

S

In cooling if the outdoor air sensor indicates

10

_

F (

5.6

_

C)

warmer than the coil sensor (or) the outdoor air sensor indicates

25

_

F (

12

_

C) cooler than the coil sensor, the sensors are out

of range.

If the sensors are out of range, the control will flash the appropriate
fault code as shown in Table 6.
The thermistor comparisons are not performed during low ambient
cooling.

Outdoor Coil Thermistor

The outdoor coil thermistor is a 10Kohm resistor used for multiple

system operations. It provides the coil/liquid line temperature to

the AC unit board and user interface. Low ambient operation, and
assistance with OAT temperature measurement are some of the

functions. The sensor must be securely mounted to the tube
connecting the coil and distributor.

See Fig. 31 for proper

placement. See Table 4 for proper resistances.

A14328

Fig. 30 -- Outdoor Coil Thermistor (OCT) Attachment

(On Distributor Tube)

OAT Thermistor must be locked in place with

spherical nib end facing towards the front of

the control box

A11142

Fig. 31 -- OAT Thermistor Location (Bottom of Control Box)

Suction Thermistor (OST)

Suction Thermistor is used to accurately measure suction

temperature and must be secured on the suction tube and aligned
longitudinally to the vertical surface of the tube axis (see Fig. 32).

CAUTION

!

UNIT DAMAGE HAZARD

Failure to follow this caution may result in equipment

damage or improper operation.
In order to minimize the ambient influence, make sure the

thermistor curved surface hugs the pipe surface and is

secured tight using the wire tie fished through the original

slot insulating polymer body.

A14023

Fig. 32 -- Suction Thermistor (OST) Attachment

(On Suction Tube)

Discharge Thermistor (ODT)

Discharge Thermistor is used for protection against over
temperature of the compressor.

The ODT is located on the

compressor discharge stub--out (see Fig. 33).

A14024

Fig. 33 - Discharge Thermistor (ODT)

Summary of Contents for EVOLUTION V 189BNV 13

Page 1: ...nstall on Solid Level Mounting Pad 3 Step 3 Clearance Requirements 3 Step 4 Operating Ambient 4 Step 5 Elevate Unit 4 Step 6 Making Piping Connections 4 Step 7 Make Electrical Connections 5 Step 8 Com...

Page 2: ...erant equipment WARNING ELECTRICAL SHOCK HAZARD Failure to follow this warning could result in personal injury or death Before installing modifying or servicing system main electrical disconnect switc...

Page 3: ...or specific applications and for R 22 retrofit Step 1 Check Equipment and Job Site Unpack Unit Move to final location Remove carton taking care not to damage unit Inspect Equipment File claim with shi...

Page 4: ...eration Do not leave system open to atmosphere any longer than minimum required for installation POE oil in compressor is extremely susceptible to moisture absorption Always keep ends of tubing sealed...

Page 5: ...re to follow this caution may result in equipment damage or improper operation Never use the system compressor as a vacuum pump Refrigerant tubes and indoor coil should be evacuated using the recommen...

Page 6: ...g 189BNV models to non communicating 2 stage thermostats Use Fig 7 For required connections Unit is configured by factory for Evolution communicating control To wire unit for non communicating control...

Page 7: ...r on Control Board Jumper Wire Required for Single Stage C BLU YEL R RED BLK A160118 O O RVS Cooling O B W2 W1 W1 Heat Stage 3 W W1 W2 Heat Cool Stage 1 Y1 W2 Y1 Y1 Heat Cool Stage 2 Y Y2 Y Y2 Y2 Fan...

Page 8: ...non communicating furnaces set airflows to 350 400 cfm nominal ton in high stage and 70 80 percent of high stage airflow in low stage Step 9 Install Accessories No refrigeration circuit accessories ar...

Page 9: ...Select Line Set Length Vapor Line Diameter CAUTION UNIT OPERATION HAZARD Failure to follow this caution may result in improper unit operation For new installations only Add additional refrigerant due...

Page 10: ...nverter Motor Operational Control MOC then outputs the three phase PWM signal and frequency that gently ramps the compressor speed up to stage 2 and then will adjust to the demanded speed The gentle r...

Page 11: ...s to stabilize before declaring a properly charged system If the indoor temperature is below 70 F 21 11 C or the outdoor temperature is not in the favorable range adjust charge for line set length abo...

Page 12: ...g Mode 189BNV024B Fig 20 Charging in Cooling Mode 189BNV025 Fig 21 Charging in Cooling Mode 189BNV036 Fig 22 Charging in Cooling Mode 189BNV037 Fig 23 Charging in Cooling Mode 189BNV048 Fig 24 Chargin...

Page 13: ...tion of the procedure 2 Force system to operate in high stage by creating a large differential between room temperature and set point on thermostat Use multi meter to verify that 24 VAC is present bet...

Page 14: ...r NOTE A hissing sound may be heard during the equalization process This is normal TROUBLESHOOTING Systems Communication Failure If communication is lost with the User Interface UI the Green LED will...

Page 15: ...r low pressure lockout check the refrigerant charge and indoor airflow cooling Brown Out Protection If the line voltage is less than 187V for at least 4 seconds the Compressor and OD fan goes to 0 rpm...

Page 16: ...and distributor See Fig 31 for proper placement See Table 4 for proper resistances A14328 Fig 30 Outdoor Coil Thermistor OCT Attachment On Distributor Tube OAT Thermistor must be locked in place with...

Page 17: ...e Unit Size Resistance Ohms 13 24B 21 2 25 36 37 48 49 60 11 1 Status Codes Unit may occasionally become unresponsive due to certain combinations of previous fault codes There may not be anything wron...

Page 18: ...18 Utility Relay A13414 Fig 34 Variable Speed Control Board with optional Utility Relay...

Page 19: ...19 Table 6 Fault Codes...

Page 20: ...ig low side retard S Use hoses with 700 psig service pressure rating S Leak detectors should be designed to detect HFC refrigerant S Puron refrigerant as with other HFCs is only compatible with POE oi...

Reviews: