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501562-UIM-A-0909

Johnson Controls Unitary Products

FIGURE 11:

Thermostat Chart - Two Stage AC – Two Stage Variable Speed Furnaces

AC 24B

Two

Stage Air Conditioner – Two Stage Variable Speed Furnace

Connection of the “C”

Terminal, 24-Volt Common,

is optional when used with

batteries

Part Numbers:

SAP = Legacy

265904 = 031-09169

24 – Volt Common

24 – Volt Hot

Single Stage Compressor

TWO STAGE

VARIABLE SPEED

FURNACE CONTROL

Fan

TWO STAGE

VARIABLE SPEED

FURNACE

W/W1

First Stage Heat

Y/Y2

Second or Full

Stage Compressor

Second Stage Heat

Reversing Valve

X/L

Malfunction Light

DHUM

Dehumidification

Move DHUM

jumper to “YES”

if humidistat is to be used.

(G/L)*(8/9)V

(F/L)*(8/9)V

PV(8/9)

ID MODELS

TWO STAGE

AIR

CONDITIONER

24 – Volt Common

24 – Volt Hot

First Stage Compressor

Second Stage

Compressor

External Humidistat

(Optional)

Open on Humidity Rise

24VAC Humidifier

(Optional)

External Humidistat

(Optional)

Open on Humidity Rise

Part Number:

S1-2HU16700124

24 – Volt Common

24 – Volt Hot

First Stage Compressor

Second Stage

Compressor

Fan

*DN22C00124

THERMOSTAT

Second Stage Heat

24 – Volt Common

24 – Volt Hot

First Stage Compressor

Second Stage

Compressor

Fan

*DP22U70124

THERMOSTAT

Second Stage Heat

Step 1 of Thermostat User

Configuration Menu must

be set to MS 2

First Stage Heat

E/W1

First Stage Heat

Connection of the “C”

Terminal, 24-Volt Common,

is optional when used with

batteries

Содержание 18 SEER - AC8B

Страница 1: ...expansion valve or an orifice liquid feed sized for the most common usage The orifice size and or refrigerant charge may need to be changed for some system combinations elevation differences or total line lengths See Tabular Data Sheet provided in unit literature packet for charge requirements Refer to Application Data covering General Piping Recommendations and Refrigerant Line Length Part Number...

Страница 2: ... both the indoor and outdoor unit Observe all limitations and clearance requirements The outdoor unit must have sufficient clearance for air entrance to the condenser coil for air discharge and for service access See Figure 1 NOTE For multiple unit installations units must be spaced a minimum of 18 inches apart coil face to coil face If the unit is to be installed on a hot sun exposed roof or a bl...

Страница 3: ... 61920 000 for installing tubing of longer lengths and elevation differences NOTE Using a larger than specified line size could result in oil return problems Using too small a line will result in loss of capacity and other problems caused by insufficient refrigerant flow Slope horizontal vapor lines at least 1 every 20 feet toward the outdoor unit to facilitate proper oil return PRECAUTIONS DURING...

Страница 4: ...em just touches the chamfered retaining wall Connect the refrigerant lines using the following procedure 1 Remove the cap and Schrader core from both the liquid and vapor service valve service ports at the outdoor unit Connect low pres sure nitrogen to the liquid line service port 2 Braze the liquid line to the liquid valve at the outdoor unit Be sure to wrap the valve body with a wet rag Allow th...

Страница 5: ...hraeder fitting and an additional 1 3 turn to seal 7 Install the TXV bulb to the vapor line near the equalizer line using the bulb clamp s furnished with the TXV assembly Ensure the bulb is making maximum contact a Bulb should be installed on a horizontal run of the vapor line if possible The bulb should be installed on top of the line b If bulb installation is made on a vertical run the bulb shou...

Страница 6: ...n seal the hole in the wall at the thermostat with permagum or equivalent to prevent air drafts affecting the operation of in the thermostat FIELD CONNECTIONS CONTROL WIRING SERIAL COMMUNICATION 1 The Communications Harness is provided with the communicating thermostat 2 Route low voltage four conductor shielded thermostat communica tions harness into junction box and connect to communications por...

Страница 7: ...thermostat owner s manual for this procedure Manual setting of the airflow jumpers on the ID equipment is not necessary with the communicating thermostat FIGURE 7 CFM Selection Board HEAT DELAY COOL ADJUST A B C D A B C D LED 2 FIGURE 8 Communicating AC with Communicating Air Handler or Furnace FIGURE 9 Communicating AC with Non Communicating Air Handler or Furnace using Communicating Interface Co...

Страница 8: ...mpressor Y2 Second Stage Compressor External Humidistat Optional Open on Humidity Rise 2 Connection of the C terminal 24 Volt common is optional when used with batteries Thermostat Installer Setup 0170 System Type must be set to 8 2 Heat 2 Cool Multistage Conventional Connection of the C terminal 24 volt common is optional when used with batteries Thermostat Installer Setup 1 System Type must be s...

Страница 9: ...DHUM jumper to YES if humidistat is to be used G L 8 9 V F L 8 9 V PV 8 9 ID MODELS TWO STAGE AIR CONDITIONER C 24 Volt Common R 24 Volt Hot Y1 First Stage Compressor Y2 Second Stage Compressor External Humidistat Optional Open on Humidity Rise 24VAC Humidifier Optional External Humidistat Optional Open on Humidity Rise 2 2 Part Number S1 2HU16700124 2 C 24 Volt Common R 24 Volt Hot Y First Stage ...

Страница 10: ... Stage Compressor VARIABLE SPEED MODULATING FURNACE CONTROL G Fan VARIABLE SPEED MODULATING FURNACE Y Y2 Second or Full Stage Compressor HUM Dehumidification Open on Humidity Rise W Modulating Heat Part Numbers SAP Legacy 171334 031 09153 1 1 Move HUMIDISTAT jumper to YES if humidistat is to be used FL9C FC9C PC9 ID MODELS External Humidistat Optional Open on Humidity Rise 24VAC Humidifier Optiona...

Страница 11: ... 1 Move HUMIDISTAT jumper to YES if humidistat is to be used FL9C FC9C PC9 ID MODELS External Humidistat Optional Open on Humidity Rise 24VAC Humidifier Optional External Humidistat Optional Open on Humidity Rise 2 2 Part Number S1 2HU16700124 2 C 24 Volt Common R 24 Volt Hot Y First Stage Compressor Y2 Second Stage Compressor G Fan DN22C00124 THERMOSTAT W2 Second Stage Heat C 24 Volt Common R 24 ...

Страница 12: ...with batteries Thermostat Installer Setup 1 System Type must be set to 6 2 Heat 2 Cool Multistage Conventional COM 24 Volt Common R 24 Volt Hot W1 First Stage Heat W2 Second Stage Heat Y1 Single Stage Compressor Y Y2 Second or Full Stage Compressor O Reversing Valve Energized in Cool X L Malfunction Light HUM Humidity Switch Open on Humidity Rise VARIABLE SPEED AIR HANDLER CONTROL G Fan VARIABLE S...

Страница 13: ...t Common is optional when used with batteries COM 24 Volt Common R 24 Volt Hot W1 First Stage Heat W2 Second Stage Heat Y1 Single Stage Compressor Y Y2 Second or Full Stage Compressor O Reversing Valve Energized in Cool X L Malfunction Light HUM Humidity Switch Open on Humidity Rise VARIABLE SPEED AIR HANDLER CONTROL G Fan VARIABLE SPEED AIR HANDLER 1 AV ID MODELS SV MV EAC 24VAC out Electronic Ai...

Страница 14: ... line charge using the tabular data sheet if line length is greater than 15 feet 4 Total system charge item 1 item 2 item 3 5 Permanently stamp the unit data plate with the total amount of refrigerant in the system Use the following subcooling charging method whenever additional refrigerant is required for the system charge A superheat charging method is not suitable for TXV equipped systems Measu...

Страница 15: ... for three seconds while the thermostat is calling for compressor opera tion Y1 input signal energized LOW VOLTAGE DETECTION The control monitors the transformer secondary 24 VAC voltage and provides low voltage protection for the AC unit and its components In particular the control prevents contactor chatter during low voltage con ditions If the voltage drops below approximately 19 VAC the contro...

Страница 16: ... present Control behavior with system master signals present 2 No response No response 2 Display compressor type TS Ultratech or single stage compressor Ignore LPS Bypass ASCD Reduce timer to zero immediately If Y1 thermostat or communication is present and the high pressure switch is closed contactors will be energized Clear soft lockout Clear soft lockout Clear hard lockout Clear hard lockout Re...

Страница 17: ...to be reset when the thermostat is satis fied or when the thermostat is set to SYSTEM OFF and back to HEAT or COOL mode 2 The TEST terminals are shorted for more than two seconds When the soft lockout condition is reset the control will stop displaying the fault code and will respond to thermostat inputs normally Hard Lockout If four soft lockouts occur within a twelve hour period the control will...

Страница 18: ...pening during a call for compressor operation When the compressor is started following a high pressure switch fault the control will start a six hour timer based on accumulated compressor run time If the control senses another opening of the high pressure switch before the timer expires it will cause a soft lockout condition The second opening of the high pressure switch must be greater than 160 m...

Страница 19: ...501562 UIM A 0909 Johnson Controls Unitary Products 19 SECTION IX WIRING DIAGRAM FIGURE 16 Wiring Diagram ...

Страница 20: ...nge without notice Published in U S A 501562 UIM A 0909 Copyright 2009 by Johnson Controls Inc All rights reserved Supersedes 347269 UIM A 0108 Johnson Controls Unitary Products 5005 York Drive Norman OK 73069 NOTES ...

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