ACiQ-24-HPB ACiQ Next Gen Heat Pump Condenser Dual Fuel User Guide

ACiQ-24-HPB ACiQ Next Gen Heat Pump Condenser Dual Fuel

Product Information

The ACiQ Next-Generation heat pump condenser is a dual fuel system that reduces heating costs in the winter compared to a standard system setup. The heat pump provides heat in most conditions and the furnace provides backup heat at extreme low temperatures. It comes in four models: ACiQ-24-HPB, ACiQ-36-HPB, ACiQ-48-HPB, and ACiQ-60-HPB. The indoor coil must have a heat pump compatible Thermostatic Expansion Valve (TXV) and be sized correctly. A 24-volt heat pump thermostat with a minimum of 2 stages of heating and 2 stages of cooling is required, with a wired, wireless, or internet-based outdoor temperature sensing feature. Standard heat/cool-only thermostats will not work for this application. The refrigerant connections require a 3/8 Liquid Line & 3/4 Suction Line.

Product Usage Instructions

1. Ensure the indoor coil has a heat pump compatible Thermostatic Expansion Valve (TXV) and is sized correctly.
2. Use a 24 volt heat pump thermostat with a minimum of 2 stages of heating and 2 stages of cooling, with a wired, wireless, or internet-based outdoor temperature sensing feature. Standard heat/cool only thermostats will not work for this application.
3. Braze the line set using copper adaptors that thread on to the outdoor unit and have a female sweat connection. Purge with nitrogen during brazing.
4. Startup the unit in heating mode to ensure no leaks are present. Retorque the flare adaptors (while unit is HOT) to ensure no leaks are present. It is recommended to use a digital torque wrench.
5. Only a licensed and certified HVAC professional should complete the installation of this equipment. Verify your selected technician is section 608-certified.
6. Set the dip switches as shown in the reference guide.
7. Set the system type to Dual Fuel, Reversing Valve (O/B) to Energized In Heating Mode, Backup Heat Type to Gas/Oil Furnace, and Outdoor Temperature Sensing to the appropriate setting based on your thermostat.
8. Wire the thermostat to the terminals on the furnace based on the brand of the thermostat and the dual fuel wiring section in the manual. Use 18/8 thermostat wire for correct low voltage wiring.

Dual Fuel System – ACiQ Heat Pump, 3rd Party Gas Furnace, 3rd Party Coil
Congratulations on purchasing an ACiQ Next-Generation heat pump condenser. Using this system in a dual fuel application will dramatically reduce your heating costs in the winter compared to a standard system setup. The heat pump will provide heat in most conditions and the furnace will provide backup heat at extreme low temperatures.

MODEL

• ACiQ-24-HPB
• ACiQ-36-HPB
• ACiQ-48-HPB
• ACiQ-60-HPB

Requirements

1. The indoor coil (often referred to as the evaporator coil or A-Coil) must have a heat pump compatible Thermostatic Expansion Valve (TXV).
2. The indoor coil must be sized correctly. At a minimum it must match the nominal BTU capacity of the selected outdoor unit. It is permissible to oversize the indoor coil by up to 1 ton (12,000 BTU/H).
3. A 24 volt heat pump thermostat with a minimum of 2 stages of heating and 2 stages of cooling must be used (2H, 2C).
4. The selected thermostat must have a wired, wireless, or internet-based outdoor temperature sensing feature.

STANDARD HEAT/COOL ONLY THERMOSTATS WILL NOT WORK FOR THIS APPLICATION

REFRIGERANT CONNECTIONS

• IMPORTANT : Line Set Size Requirements = 3/8″ Liquid Line & 3/4″ Suction Line.
• IMPORTANT : This system comes with copper adaptors that thread on to the outdoor unit. The other end of the adaptor has a female sweat connection which allows for brazing the line set.
• IMPORTANT : Purge with nitrogen during brazing! If you skip this essential step the abrasive, oxidative buildup will dramatically shorten the compressor’s life and void the warranty. DO NOT skip this step.
• IMPORTANT : To ensure no leaks are present startup the unit in heating mode. While the unit is operating retorque the flare adaptors (while unit is HOT). It is recommended to use a digital torque wrench.
• IMPORTANT : Only a licensed and certified HVAC professional should complete the installation of this equipment. Please verify your selected technician is section 608-certified.

System Setup

SET DIP SWITCHES AS SHOWN

L1| Line Voltage Power – Must Also Connect Ground Wire| Wired To Outdoor Disconnect
---|---|---
L2
R| 24 Volt Hot (Power)| ****

Wired To Selected Indoor Unit

C| 24 Volt Common
Y1| Heat/Cool Stage 1
Y2| Heat/Cool Stage 2 (High Demand)
B| Reversing Valve (Energized In Heating)
W| IGNORE – DO NOT USE
D| IGNORE – DO NOT USE
L| IGNORE – DO NOT USE

Thermostat Wiring

IMPORTANT – Every thermostat is different. Modern thermostats will have an “Installer Setup” or “Advanced Options” mode. A dual fuel setup requires a heat pump compatible thermostat, which will call on the furnace only as backup heat at extreme low temperatures. Here are general guidelines – refer to your thermostat manual for specifics.

Installer Setup & Advanced Options Settings

System Type: Set To Dual Fuel
Reversing Valve (O/B ): Set To Energized In Heating Mode (Opposite Of Most Default Settings)
Backup Heat Type : Set To Gas/Oil Furnace
Outdoor Temperature Sensing: Varies Based On Thermostat (Wi-Fi, Wired, Or Wireless Sensor)
Lockout/Switchover Temperature: Varies Based On Desire For Greater Efficiency Or Comfort. Maximum Comfort = 35 °F, Maximum Efficiency = -10 °F, Our Recommendation = 0 °F
IMPORTANT – the heat pump and the furnace should NEVER run at the same time. Most heat pump thermostats are already configured to prevent this from happening.

Typical Wiring Example

• Thermostat wiring to the terminals on the furnace will vary based on the brand of the thermostat. Please refer to the thermostat manual for furnace wiring. Look for a section on dual fuel wiring. Some thermostats send the call for backup heat over the W terminals as shown. Some send the backup call over Aux/E.
• 18/8 thermostat wire will be required for correct low voltage wiring. A common color scheme is shown in the diagram, but please note colors may vary.

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