Hvac / Air Conditioners
ACiQ 18K-55K Multi-Zone Condenser Air Handler Compatibility Chart
Quick reference guide for ACiQ 18K-55K multi-zone condenser compatibility, including air handler model matching, refrigerant pipe length limits, and indoor unit combination tables.
Table of contents
Quick guide from the manual
This document serves as a technical reference for installers and technicians to ensure correct compatibility between ACiQ multi-zone outdoor condensers and various indoor air handler units. It provides essential data on model matching, refrigerant piping limitations, and valid system combinations.
Condenser Model Reference
The following outdoor units are covered by this guide, all operating on 208/230V, 60Hz, 1-phase power:
- Standard Heat Models: ES-18Z-M3C, ES-27Z-M4C, ES-36Z-M5C, ES-48Z-M6C, ES-55Z-M6C
- Extreme Heat Models: ACiQ-18Z-HH-M3C, ACiQ-27Z-HH-M4C, ACiQ-36Z-HH-M5C, ACiQ-48Z-HH-M6C, ACiQ-55Z-HH-M6C
Compatible Air Handlers
The system supports various indoor unit types, including ceiling cassettes (4-way and 1-way slim), concealed ducts, console/floor-ceiling mounts, and wall-mounted units. Refer to the specific model series (e.g., ACiQ-09CC-HH-MC, ACiQ-18AHB-HH-MB) to ensure the indoor unit is compatible with your selected condenser.
Pipe Length and Drop Height
Adherence to piping limits is critical for system performance. Maximum lengths and height differences vary by zone count:
- Max length for all rooms: 131ft (40m) for 2-zone up to 262ft (80m) for 4-6 zones.
- Max height difference between IDU and ODU: 49ft (15m).
- Max height difference between Indoor Units: 33ft (10m).
Caution: Refrigerant pipe diameters differ based on the indoor unit model. If the pipe diameter differs from the outdoor unit union, an additional transfer connector must be used.
Indoor Units Combinations
The manual provides extensive tables for each condenser model (ES-18Z-M3C through ES-55Z-M6C) detailing valid combinations of indoor units. These tables specify the allowed BTU capacities for one, two, three, four, five, or six units depending on the condenser's zone capacity.
Manufacturer information
ACiQ
Practical help
Common problems
Refrigerant pipe diameter mismatch
Use the provided adaptor tables to select the correct transfer connector when the indoor unit pipe size differs from the outdoor unit union.
System performance issues due to pipe length
Verify that the total pipe length and height differences between indoor and outdoor units do not exceed the limits specified for your specific zone configuration (2-6 zones).
Before use
- Confirm the condenser model matches the intended capacity (18k-60k BTU).
- Ensure the power supply is 208/230V, 60Hz, 1-phase.
- Check that the selected indoor units are compatible with the specific condenser model.
- Calculate the total refrigerant pipe length and height difference against the zone-specific limits.
- Verify if additional transfer connectors are required for the specific pipe diameters.
Specs in practice
- Capacity (Btu/h)
- The cooling/heating output rating of the outdoor unit, ranging from 18k to 60k BTU.
- Max. height difference (IDU/ODU)
- The maximum vertical distance allowed between the indoor and outdoor units (49ft/15m).
- Liquid/Gas Pipe Diameter
- Required refrigerant line sizes, which vary based on the indoor unit BTU capacity (e.g., 6k-12k vs 24k-36k).
Images and diagrams
- The manual contains detailed tables for each condenser model listing valid indoor unit combinations.
- Adaptor tables are provided to assist in matching different pipe sizes between indoor and outdoor units.
Model compatibility
- If at least one ducted air handler (AHU) is used, specific combination rules apply.
- Refrigerant pipe diameters are dependent on the specific indoor unit model connected.
Manual page author
Michael Turner
Technical manual editor
Reviews PDF manuals for structure, safety notes, and practical product details so readers can find the right information quickly.