Nortek Flex Match Series User Manual

Connecting the refrigerant pipe
Wrench
Indoor unit tubing
Open-end wrench (fixed)
Connection pipe
Flare nut
1)Use torque wrenches when tightening the flare nuts to prevent damage to the flare nuts and gas leaks.
Coat here with refrigeration oil
AligntheFHQWHUVofbothflaresandtightentheflaresandtightentheflarenuts3or4turnsbyhand.
Then
tightenthemfullywiththetorquewrenches.
Topreventgasleakage,applyrefrigerationoilonbothinnerandoutersurfacesintheflare.(Userefrigerationoilfor
R410A.)
Liquid side
09K/12K
09K/12K
18K
09K
18K
09K/12K/18K18K
3/8 inch 1/2 inch 1/4 inch
31 -35
N.m
50 -55
N.m 15 -20
N.m
Flare nut tightening torque
Gas side
Caution on piping handling
Protecttheopenendofthepipeagainstdustandmoisture.
Allpipebendsshouldbeasgentleaspossible.Useapipebenderfor
bending.
(Bending
radiusshouldbeWRPPWRLQorlarger.)
Gas pipe
Gas pipe
insulstion
Finising tape
Inter-unit wiring
Liquid pipe
Liquid pipe
insulation
Selection of copper and heat insulation materials
When
usingcommercialcopperpipesandfittings,observethe
following:
1)Insulation
material:Polyethylenefoam
Heat
transferrate:0.041to0.052W/mK(0.035to0.045kca/(mh
Refrigerantgaspipe’ssurfacetemperaturereaches110 
)
max.Chooseheatinsulationmaterialsthatwillwithstandthis
temperature.
2)Be sure to insulate both the gas and liquid piping and to provide insulation dimensions as below.
Liquidside
Liquidpipe
thermalinsulation

O.D.12.7mmLQ
O.D.6.4mmLQ

GaspipethermalinsulationGasside
Thickness10mmMin.Thickness0.8mm
3)Use separate thermal insulation pipes for gas and liquid refrigerant pipes.
Be sure to
place a cap.
If no flare cap is
available,cover
the flare mouth
with tape to keep
dirt or water out.
INSTALLATION INSTRUCTIONS
Installation of indoor unit

O.D.9.55mmLQ
I.D.12-15mm
LQ

I.D.14-16mm
LQ

I.D.8-10mm
LQ

Nortek Flex Match Series Specifications

General

Brand	Nortek
Model	Flex Match Series
Category	Heat Pump
Language	English