HVAC / Heat Pumps
User Guide for ACiQ Next Gen Heat Pump Condenser
Quick start guide for ACiQ Next Gen Heat Pump Condenser. Includes installation requirements, refrigerant connection guidelines, system setup, dip switch configuration, and thermostat wiring instructions for dual fuel systems.
Quick answers from the manual
Quick answer
- The ACiQ Next Gen Heat Pump Condenser is a dual fuel system requiring a 24V heat pump thermostat (2H, 2C) with outdoor temperature sensing. Installation requires a licensed HVAC professional, a TXV-equipped indoor coil, and specific nitrogen purging during brazing. p. 1, 2
Key actions
- Purge with nitrogen during brazing to prevent compressor damage. p. 2
- Configure thermostat for Dual Fuel and set Reversing Valve to Energized in Heating. p. 4
First start
- Startup the unit in heating mode to check for leaks and retorque flare adaptors while the unit is hot. p. 2
Show 2 more answers Show less
Technical specifications
| Parameter | Value | Meaning | Pages |
|---|---|---|---|
| Liquid Line | 3/8" | Required line set size | p. 2 |
| Suction Line | 3/4" | Required line set size | p. 2 |
| Lockout Temperature | 0°F | Recommended switchover temperature | p. 4 |
Where to find it in the PDF
- Quick Start Guide p. 1
- Requirements and Connections p. 2
- System Setup p. 3
- Thermostat Wiring p. 4
Table of contents
Manual images
Click an image to enlargeQuick Start Guide
This guide provides essential installation and setup instructions for the ACiQ Next Gen Heat Pump Condenser in a dual fuel application. This system is designed to work with a 3rd party gas furnace and coil to reduce heating costs. Installation must be performed by a licensed and certified HVAC professional (Section 608-certified).
Installation Requirements
- Indoor Coil: Must have a heat pump compatible Thermostatic Expansion Valve (TXV).
- Sizing: The indoor coil must match the nominal BTU capacity of the outdoor unit. Oversizing by up to 1 ton (12,000 BTU/H) is permitted.
- Thermostat: A 24-volt heat pump thermostat with a minimum of 2 stages of heating and 2 stages of cooling (2H, 2C) is required. It must include outdoor temperature sensing (wired, wireless, or internet-based). Standard heat/cool-only thermostats are not compatible.
Refrigerant Connections
- Line Set: Requires 3/8" Liquid Line and 3/4" Suction Line.
- Brazing: The system includes copper adaptors with female sweat connections. You must purge with nitrogen during brazing. Failure to do so will cause abrasive, oxidative buildup, shorten compressor life, and void the warranty.
- Leak Check: Startup the unit in heating mode to ensure no leaks are present. Retorque flare adaptors while the unit is hot using a digital torque wrench.
System Setup and Wiring
The control board features dip switches and terminal blocks for system configuration.
- Dip Switches: Configure as shown in the reference diagram (1: OFF, 2: ON, 3: ON, 4: OFF).
- Terminal Connections:
- L1/L2: Line Voltage Power (must connect ground wire).
- R: 24 Volt Hot (Power).
- C: 24 Volt Common.
- Y1: Heat/Cool Stage 1.
- Y2: Heat/Cool Stage 2 (High Demand).
- B: Reversing Valve (Energized in Heating).
- W, D, L: Ignore/Do not use.
Thermostat Configuration
Configure the thermostat in the "Installer Setup" or "Advanced Options" menu:
- System Type: Set to Dual Fuel.
- Reversing Valve (O/B): Set to Energized in Heating Mode.
- Backup Heat Type: Set to Gas/Oil Furnace.
- Lockout/Switchover Temperature: Recommended setting is 0°F. (Maximum comfort: 35°F; Maximum efficiency: -10°F).
Important: The heat pump and furnace should never run at the same time. Most heat pump thermostats are configured to prevent this.
Manufacturer information
ACiQ
Practical help
Common problems
Compressor failure or voided warranty
Ensure you purge with nitrogen during brazing. Skipping this step causes oxidative buildup.
System not heating or cooling correctly
Verify the thermostat is a 24V heat pump model (2H, 2C) with outdoor temperature sensing. Standard heat/cool thermostats will not work.
Refrigerant leaks
Startup the unit in heating mode and retorque the flare adaptors while the unit is hot.
Before use
- Verify technician is Section 608-certified.
- Ensure indoor coil has a heat pump compatible TXV.
- Confirm line set size is 3/8" (Liquid) and 3/4" (Suction).
- Use 18/8 thermostat wire for low voltage connections.
- Set dip switches according to the reference guide.
- Configure thermostat for Dual Fuel and Gas/Oil furnace backup.
Show more Show less
Specs in practice
- Lockout Temperature
- Recommended 0°F. Determines when the system switches from heat pump to furnace.
Images and diagrams
- Dip switches must be set to: 1-OFF, 2-ON, 3-ON, 4-OFF.
- Terminal block wiring: L1/L2 for power, R/C for 24V, Y1/Y2 for stages, B for reversing valve.
- Wiring diagram shows connections between Thermostat, Furnace, and ACiQ Heat Pump.
Model compatibility
- Compatible with 3rd party gas furnaces and coils.
- Requires heat pump compatible thermostat with outdoor sensing.
Manual page author
Emily Carter
User documentation editor