Pioneer Lineset Diameter Reference Guide

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"