Support Center logo
Support Center logo

All articles

Pioneer Lineset Diameter Reference GuideUpdated 10 months 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"
Was this article helpful?
Yes
No