ACIQ 24-EHPB Series Next Gen Heat Pump System User Guide

24-EHPB Series Next Gen Heat Pump System

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Specifications

• Model: ACiQ Next Gen Ducted Heat Pump System
• Available Models: ACiQ-24, ACiQ-36, ACiQ-48, ACiQ-60
• Features: Variable speed, inverter-driven heat pump condenser,
  smart air handler with variable speed blower

Product Usage Instructions

Connecting the Thermostat

To connect the thermostat to your ACiQ system, follow these
steps:

1. Refer to the installation manual for detailed
   instructions.

2. Identify the type of thermostat you have (communicating
   controller, 24V thermostat, or 3rd party 24V thermostat).

3. Based on your thermostat type, follow the wiring diagrams
   provided in the manual to make the proper connections between the
   indoor and outdoor units.

4. Ensure that the communication wire used is 18/2 AWG shielded
   cable and grounded at only one end.

5. Insert a battery into the thermostat to ensure it turns
   on.

Proper Communication Setup

For efficient communication between units, follow these
guidelines:

• Use the specified communication wire to avoid errors.

• Ground the shielded wire at only one end to prevent
  communication errors.

• Keep the communication wire at least 18 inches away from any
  line voltage wires.

• Run the communication wire perpendicular to power lines, not
  along with them, for optimal performance.

Photo Examples

Refer to the photos in the manual for visual guidance on proper
installation and wiring setup.

FAQ

Q: What type of wire should I use for communication between

units?

A: Use 18/2 AWG shielded cable for communication. Using the
specified wire is crucial to avoid communication errors.

Q: Why is grounding the shielded wire important?

A: Grounding the shield at only one end prevents communication
errors. Do not ground the shield at both ends.

Q: How far should I keep the communication wire from line

voltage wires?

A: The communication wire should be run a minimum of 18 inches
away from any line voltage wires to prevent communication
errors.

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2024 V1

Quick Start Guide
ACiQ Next Gen Ducted Heat Pump System

ACiQ-24-AHB/ACiQ-24-HPB ACiQ-36-AHB/ACiQ-36-HPC ACiQ-48-AHB/ACiQ-48-HPB ACiQ-60-AHB/ACiQ-60-HPB

ACiQ-24-AHB/ACiQ-24-EHPB ACiQ-36-AHB/ACiQ-36-EHPB ACiQ-48-AHB/ACiQ-48-EHPB ACiQ-60-AHB/ACiQ-60-EHPB

Thank you for purchasing a Next Gen Heat Pump system from ACiQ! This system gives you the benefits of a variable speed, inverter driven heat pump condenser, combined with a smart air handler with a variable speed blower.
This Quick Start Guide covers how to connect the thermostat to your system and ensure proper communication. It is not meant to replace the entire installation manual. Please reference install manual for in depth instructions.

ACiQTM Wiring Diagrams and Connections

The wiring diagrams below and on the following pages show the proper wiring and DIP switch settings (for indoor and outdoor units) depending upon your application and the type of thermostat used (standard wired controller or 24V thermostat).

SCENARIO

CONTROLLER

SCENARIO 1 (RECOMMENDED)

ACIQ COMMUNICATING CONTROLLER (STANDARD)

INDOOR UNIT
AIR HANDLER

CONNECTION BETWEEN INDOOR &
OUTDOOR UNITS
RS485: S1/S2

OUTDOOR UNIT

AHU DIP SWITCH

SW1-1

SW1-4

ODU DIP SWITCH
S1-2

STANDARD OUTDOOR UNIT

OFF (Default)

OFF (Default)

OFF (Default)

SCENARIO 2

ACIQ T755 24V THERMOSTAT

AIR HANDLER

RS485: S1/S2

STANDARD OUTDOOR UNIT

ON

OFF (Default)

OFF (Default)

SCENARIO 3

3RD PARTY 24V THERMOSTAT

AIR HANDLER

24V: R/C/B/Y1/Y2/G/W

STANDARD OUTDOOR UNIT

ON

ON

ON

WARNING ­ In ALL wiring scenarios, be sure to turn off the circuit breaker and pull the disconnect before wiring. Incorrect wiring can cause an electrical short and destroy the main circuits boards!

SCENARIO 1: INCLUDED RS485 COMMUNICATING CONTROLLER THERMOSTAT
(Standard and Recommended Installation)
Please note that using the provided communicating thermostat will provide maximum efficiency. But when using this thermostat the unit will prioritize efficiency over comfort. The system will maintain a comfortable temperature but may run longer than some people desire. For conventional control over the unit see option #2.

ACIQ COMMUNICATING CONTROLLER

INDOOR AHU

OUTDOOR ODU

HA / HB
Interchangeable with optional 20 ft long 4-wire communicating harness. Connects to the S-485 port.
NON-POLARITY RS485 COMMUNICATION

S1 / S2
18/2 AWG shielded wire must be used & grounded on ONLY one side
Gen2 Outdoor Board: Note the cover on BOTH rows of terminal screws. Lift the covers to access the screws.

ACiQTM Wiring Diagrams and Connections
SCENARIO 1 Continued: INCLUDED RS485 COMMUNICATING CONTROLLER THERMOSTAT
(Standard and Recommended Installation)
IMPORTANT NOTES
Communication wire connected to S1 & S2 MUST be 18/2 AWG shielded cable. Failure to use specified wire can result in communication errors.
The shielded ground must be grounded at one end ONLY. DO NOT ground the shield at both ends. Failure to follow this procedure can result in communication errors.
Communication wire must be run a minimum of 18″ away from any line voltage wires. Failure to follow this procedure can result in communication errors. Always try to run the communication wire perpendicular to power lines and NOT along with them.
Ensure battery is inserted in the thermostat and wiring is connected. Without battery, the thermostat will not turn on.

Photo Examples

Indoor Air Handler Circuit Boards

Data Transfer Board

Main Board (Side Facing)

ACIQ Provided Thermostat

Ensure battery is inserted here. Without battery thermostat will not turn on.

HA & HB wiring terminals

ENC2 Aux Heat
Lockout S3
ENC2 Compressor
Lockout
S4
SW1
SW2 SW3 HA / HB SW4 S-485

18/2 Shielded Cable
Shield Ground Gen1 Outdoor Board (Discontinued)

Gen2 Outdoor Unit Circuit Board

Terminal Block (Left)

Communication Board (Right)

Upper terminal screws shown Lower terminal screws under the label

Terminal screws under the labels

Common Wiring Connections, Continued
SCENARIO 2: OPTIONAL 24v ACIQ (T755) THERMOSTAT
This option shows how to wire the 24 volt ACiQ thermostat to the air handler. This method prioritizes comfort over efficiency. Please note for this method to work DIP switch SW1-1 needs to be turned ON. This method also uses S1 & S2 to communicate between the air handler and the condenser (no 24 volt wire is run outside) only 18/2 shielded wire is run outside. For additional thermostat wiring options, see page 5.

24v THERMOSTAT ACIQ T755

INDOOR AHU

OUTDOOR ODU

24v S1 / S2

NON-POLARITY RS485 COMMUNICATION

Verify outdoor unit is receiving 208/240 volts to L1 & L2 as well. L1 & L2 are on a separate terminal block.

IMPORTANT!
24 Volts AC must NEVER be connected to S1 & S2. Doing so will cause irreversible damage to the outdoor communication board.

Common Wiring Connections, Continued
SCENARIO 3: OPTIONAL THIRD-PARTY 24v THERMOSTAT (ECOBEE, NEST, ETC)
This option shows how to wire any 24 volt thermostat to the air handler without communication. This method also prioritizes comfort over efficiency. Please note for this method to work DIP switch SW1-1 needs to be turned ON. This method also uses 24v wiring to communicate between the air handler and the condenser using regular thermostat cable. For thermostat wiring options, see page 6.

24v THERMOSTAT

INDOOR AHU

OUTDOOR ODU

24v

XX

X

X

24v

24V NON-COMMUNICATING
IMPORTANT!
24 Volts AC must NEVER be connected to S1 & S2. Doing so will cause irreversible damage to the outdoor communication board.

Wiring Diagrams and Connections Without Communication
Scenario 3 24v Connection Method C (36k to 60k Units Only): The following wiring diagrams are suitable for the AHU and outdoor condenser when used ith a 24v thermostat without communication.
NOTE: This equipment uses B functionality. The terminal is energized for heating functionality. Please ensure thermostat is setup for B functionality.

Air Handler DIP Switch Guide

2023 V1.2

Function Settings

Thermostat Wiring Method

SW1-1

OFF

RS-485 Communication. Used For ACiQ Communicating Thermostat.

ON

Used For 24 Volt Thermostats.

Cold Air Prevention – Defrost

SW1-2

OFF

Cold Air Prevention Activated – Fan Stops

ON

No Cold Air Prevention – Fan Continues To Operate

System Type

SW1-3

OFF

Heat Pump

ON

Cooling Only

Indoor & Outdoor Unit Wiring Method

SW1-4

OFF

S1 & S2 (DC Communication / Only Applies To ACiQ Condenser)

ON

24 Volt Wires (No True Communication / Applies To All Condensers)

Default AHU DIP Switch Settings Shown Below

SW2-1

OFF

ON

SW2-2

OFF

ON

SW2-3

OFF

ON

SW2-4

OFF

ON

Heat Settings Auxiliary Heat Activation Differential
4 °F Gap Between T1 & Ts Sensors 2 °F Gap Between T1 & Ts Sensors Auxiliary Heat Activation Delay
None Yes Auxiliary Heat Activation Delay Time 15 Minute Delay (For Electric Heat) 30 Minute Delay (For Electric Heat) Heat Source Lock Outs In This Position Electric Heat Lockout Can Be Set Via ENC2 In This Position Compressor Lockout Can Be Set Via ENC2

Delay between 1st stage & 2nd stage electric heat is time based, not temperature based.
T1 Sensor = Return Air Temp (Room Temp), Ts = Set point
SW2-3 only works if SW2-2 is turned ON.
This sets maximum temperature, anything over this setting locks out. This sets minimum temperature, anything under this setting locks out.

ENC2 Dial Referenced In SW2-4. 16 Digits To Select From (0-9, A-F). Lock Out Range = -4 S3 °F to 46 °F. 0 = No Lock Out, 1 = -4 °F Lock Out, F = 46 °F Lock Out. Each Digit Increases
Temperature By 3.6 °F. Chart Provides Temperature Rounded To Nearest Whole Number.

1 = -4 °F 2 = 0 °F 3 = 3 °F 4 = 7 °F

5 = 10 °F 6 = 14 °F 7 = 18 °F 8 = 21 °F

9 = 25 °F D = 39 °F A = 28 °F E = 43 °F B = 32 °F F = 46 °F C = 37 °F

SW3-1

OFF

ON

SW3-2

OFF

ON

SW3-3

OFF

ON

Heat Settings Cont. Ramping Up Algorithm Delay
1.5 Hours (Efficiency) 0.5 Hours (Comfort) Y/Y2 Temperature Differential Adjustment
3.6 °F (Efficiency) 1.8 °F (Comfort) W2 Temperature Differential Activation 6 °F (Efficiency) 4 °F (Comfort)

This sets the maximum continuous runtime allowed before the system automatically stages up capacity. Only applies if 24 volt
thermostat is being used.
If using 24 volt thermostat this sets compressor speed instead. ON = slower, OFF = Faster.
This DIP switch only works if using the provided communicating ACiQ thermostat. Otherwise delay is time based.

Electric Heat Nominal CFM Adjustment

SW4

Available settings are 000/001/010/011. Each digit corresponds with an

individual switch position.

OFF = 0, ON = 1. For example [SW4-1 OFF, SW4-2 ON, SW4 -3 OFF] = 010

S4-1

OFF

ON

S4-2

OFF

ON

Heat Settings Cont. Aux Heat Control W1 & W2 Controlled Separately W1 & W2 Not Controlled Separately
Dehumidify Control DH Terminal Available To Be Used DH Terminal Deactivated

General Notes If selected 24 volt thermostat has an E/AUX option and it is used
to activate heat, all delays will be bypassed.
When auxiliary heat is energized the fan will run in Turbo Mode.

IMPORTANT: In order for changes to take effect power must be OFF BEFORE DIP switch changes.

Default setting is OFF except S4.

Please note if using the provided ACiQ thermostat DIP Switch Settings will not need to be adjusted. DIP Switch settings should only be adjusted by a professional HVAC service technician. Please note in this quick start guide the specific DIP Switches that need adjusted will be shown to ensure accurate operation for the chosen set up. For Option 1 nothing needs to be done. For
Option 2 please refer to the DIP Switch diagram that shows the correct position of the DIP Switches.

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