Pioneer Lineset Diameter Reference GuideUpdated a year ago
Diameter Selection Guide for Pioneer HVAC Mini and Multi Systems
The below tables will match the line set diameter to the Indoor unit, rather than the outdoor. For single-zone equipment, the connection diameter on the indoor unit and the outdoor unit are the same. For multi-zone equipment, typically the connection diameter will be 1/4"-3/8" for the first 3 valve sets, and 1/4"-1/2" for valves sets 4 and 5.
Quantum Series Inverter+ (WYS-17, WYS-19, WYS-20) and Inverter++ (WYS-22, CYB-22, RYB-22, UYB-22, FYB-22) Ductless and Ducted Mini Split Systems
Model Shorthand | First Two Letters | Actual Model Number Encompassed | Diameter |
All 9,000 BTU Models (except for WS009AMFI22HLD or WS009AMFI22HLE) | WS, CB, RB | WS009AMFI17HLD, WS009GMFI17HLD, WS009AMFI19HLD, WS009GMFI19HLD, WS009AMFI20HLD, WS009GMFI20HLD, WS009GMFI22HLD, WS009GMFI22HLE, CB009GMFILCFHD, RB009GMFILCFHD, RB009GMFILDFHD, FB009GMFILCFHD | 1/4"-3/8" |
All 12,000-18,000 BTU Models (along with WS009AMFI22HLD or WS009AMFI22HLE) | WS, CB, RB, FB, UB | WS009AMFI22HLD, WS009AMFI22HLE, WS012AMFI17HLD, WS012AMFI19HLD, WS012AMFI20HLD, WS012GMFI17HLD, WS012GMFI19HLD, WS012GMFI20HLD, WS012AMFI22HLD, WS012AMFI22HLE, WS012GMFI22HLD, WS012GMFI22HLE, WS018GMFI17HLD, WS018GMFI19HLD, WS018GMFI20HLD, WS018GMFI22HLD, WS018GMFI22HLE, CB012GMFILCFHD, CB018GMFILCFHD, RB012GMFILCFHD, RB012GMFILDFHD, RB018GMFILCFHD, RB018GMFILDFHD, FB012GMFILCFHD, FB012GMFILDFHE, UB018GMFILCFHD | 1/4"-1/2" |
All 24,000 BTU and Above Models | WS, CB, RB, UB | WS024GMFI17HLD, WS024GMFI19HLD, WS024GMFI20HLD, WS024GMFI22HLD, WS024GMFI22HLE, WS030GMFI17HLD, WS030GMFI20HLD, WS036GMFI17HLD, WS036GMFI20HLD, CB024GMFILCFHD, CB024GMFILCFHE, RB024GMFILCFHD, RB024GMFILDFHD, UB024GMFILCFHD, CB036GMFILCFHD, CB036GMFILCFHE, RB036GMFILCFHD, RB036GMFILDFHD, UB036GMFILCFHD, CB048GMFILCFHD, CB048GMFILCFHE, RB048GMFILCFHD, RB048GMFILDFHD, UB048GMFILCFHD | 3/8"-5/8" |
WS=Wall Units, CB=Ceiling Units, FB=Floor Units, UB=Floor/Ceiling Flex Units, RB=Duct Concealed Units
YN-M Multis (Quantum Inverter++ Multi Series (2, 3, 4, and 5 Zones)
Model Shorthand | Model Number | # of Circuits | Valve Size Layout |
Dual-Zone | YN020GMFI22M2D, YN020GMFI22M2E | 2 | (2) 1/4"-3/8" |
Triple-Zone | YN030GMFI22M3D, YN030GMFI22M3E | 3 | (3) 1/4"-3/8" |
Quad-Zone | YN040GMFI22M4D, YN040GMFI22M4E | 4 | (3) 1/4"-3/8" / (1) 1/4"-1/2" |
Quint-Zone | YN050GMFI22M5D, YN050GMFI22M5E | 5 | (3) 1/4"-3/8" / (2) 1/4"-1/2" |
Note that all multi-zone outdoor units will include adapters to connect different sized linesets for indoor units that are a part of a compatible combination (See MATCHING TABLE FOR MULTI-ZONE).
Diamante (Pro) Series (WYT-19) Ductless Single-Zone Wall-Mount Systems
Model Shorthand | First Two Letters | Actual Model Number Encompassed | Diameter |
9,000-18,000 BTU Models | WT | WT009ALFI19HLD, WT009ALFI19HLE, WT009GLFI19HLD, WT009GLFI19HLE, WT012ALFI19HLD, WT012ALFI19HLE, WT012GLFI19HLD, WT012GLFI19HLE, WT018GLFI19HLD, WT018GLFI19HLE | 1/4"-3/8" |
24,000 BTU Models | WT | WT024GLFI19HLD, WT024GLFI19HLE | 1/4"-1/2" |
36,000 BTU Models | WT | WT036GLFI19HLD, WT036GLFI19HLE | 1/4"-5/8" |
WT=Wall Units
Diamante Ultra Series (WYT-22) Ductless Single and Multi-Zone Wall-Mount Systems
Model Shorthand | First Two Letters | Actual Model Number Encompassed | Diameter |
9,000-12,000 BTU Models | WT | WT009ALFI22HLD, WT009GLFI22HLD, WT012ALFI22HLD, WT012GLFI22HLD, | 1/4"-3/8" |
18,000 BTU Models | WT | WT018GLFI22HLD | 1/4"-1/2" |
24,000 BTU Models | WT | WT024GLFI22HLD | 1/4"-5/8" |
WT=Wall Units
YN-L Multis (Diamante Ultra Multi Series (2, 3, and 4 Zones)
Model Shorthand | Model Number | # of Circuits | Valve Size Layout |
Dual-Zone | YN020GLFI22M2D | 2 | (2) 1/4"-3/8" |
Triple-Zone | YN030GLFI22M3D | 3 | (3) 1/4"-3/8" |
Quad-Zone | YN040GLFI22M4D | 4 | (4) 1/4"-3/8" |
Note that all multi-zone outdoor units will include adapters to connect different sized linesets for indoor units that are a part of a compatible combination (See Page 4 MATCHING TABLE FOR MULTI-ZONE).
Hyperformance Series (WYF-25) Ductless Single-Zone Wall-Mount Systems
Model Shorthand | First Two Letters | Actual Model Number Encompassed | Diameter |
9,000-12,000 BTU Models | WF | WF009GHFI25HLH, WF012GHFI25HLH | 1/4"-3/8" |
18,000 BTU Models | WF | WF018GHFI25HLH | 1/4"-1/2" |
24,000 BTU Models | WF | WF024GHFI25HLH | 3/8"-5/8" |
WF=Wall Units
Ducted Central Series (DYR) Split Heat Pump Systems
Model Shorthand | First Two Letters | Actual Model Number Encompassed | Diameter |
24,000 BTU Models | DR | DR024GHFD18HT2, YH1824GHFD18R2 | 3/8"-5/8" |
36,000 BTU Models | DR | DR036GHFD18HT2, YH3036GHFD18R2 | 3/8"-3/4" |
48,000-56,000 BTU Models | DR | DR048GHFD18HT2, YH4248GHFD18R2, DR060GHFD18HT2, YH4860GHFD18R2 | 3/8"-7/8" |
DR=Ducted Air Handler, YH=Central Split Condenser
*Models continuously updated. All models are subject to change without notice.
Wrench/Tool Sizes Needed
The corresponding Wrench/Tool sizes needed to turn the flare nuts of the line-sets are as follows:
Line Diameter | Wrench Size |
1/4" | 5/8" |
3/8" | 13/16" |
1/2" | 15/16" |
5/8" | 1-1/16" |
3/4" | 1-5/16" |