Watts Onix Coils Installation guide

Brand: Watts

Model: Onix Coils

Type: Installation guide

Fan CoilBaseboard

3131 W. Chestnut Expressway

Springfield,

MO 65802

ph: 417.864.6108

fax: 417.864.8161

web: www.wattsradiant.com

For Baseboards, Fan Coils and Manifolds

Onix Connections

HiGuard™ Industrial Cover

AlumaShield™ Oxygen Barrier

Durel™ Inner Tubing

Contour Extrusion Layer

Fluid Channel

Onix™ by WattsRadiant

PRODUCT DESCRIPTION

Onix is a polymer-rich, multi-layer,

industrial-grade radiant hose used for

hydronic heating and snowmelting

applications. It contains five

distinct structural layers. The Durel

inner tube is peroxide-cured, cross-

linked EPDM (Ethylene Propylene

Diene Monomer). This layer is

wrapped with a ductile 00 grade alu-

minum oxygen barrier, called

AlumaShield. A contour layer of Durel

(EPDM) is extruded over the

AlumaShield. Spiral reinforcing cords

of Aramid fibers are applied over the

contour layer. This reinforcing is cov-

ONIX FOR SUPPLY

AND RETURN PIPING

Watts Radiant’s Onix tubing offers a

unique solution to a common problem

associated with baseboard and fan

coil systems. Running supply and

return lines to these units can be a

challenge, especially in renovation

projects.

Onix is the only synthetic tubing in the

radiant heating industry to offer an

extended high temperature warranty

of 210°F at 12 to 25 psi working pres-

sure. This higher temperature limit

allows for more

flexibility in design and

post-installation adjustments.

In addition to the higher temperature

range, Onix offers improved resist-

ance to oxygen permeation with its 00

grade AlumaSheild oxygen barrier.

This barrier actually works at temper-

ered with the outer HiGuard cover

composed of sulfur-cured, cross-

linked EPDM.

OPERATING TEMPERATURE

AND PRESSURE

Onix has a maximum working temper-

ature of 180°F at 100 psi. Burst pres-

sure is greater than 800 psi at 70°F;

greater than 600 psi at180°F.

atures above 140°F, unlike most

EVOH barriers found on PEX piping.

Different techniques are used to con-

nect Onix to baseboard, fan coils or

manifolds. It is important to prevent

Onix from exceeding its minimum

allowable bend radius. If this radius

can not be maintained, a copper

elbow should be hard piped to the

unit prior to the installation of the Onix

Barb fitting.

HiGuard™ Industrial Cover

AlumaSheild™ Oxygen Barrier

Durel™ Inner Tubing

Fluid Channel

Contour Extrusion Layer

Aramid™ Fiber Reinforcing

Manifold

Onix

Barb

SureClamp

Onix™

Onix™ by WattsRadiant

R4"

R5"

R6"

R8"

1/2” Onix

5/8” Onix

3/4” Onix

1” Onix

Onix Elbow

Fitting

SureClamp

Onix

Onix Barb

SureClamp

Onix

CONNECTION DETAILS

1. Choose the correct Onix size for

the design flow rate (see below).

2. Choose the corresponding Onix

Barb or Elbow and clamp

(SureClamp or SelfTite).

3. Solder the Onix Barb, or Onix

Elbow, onto the baseboard, fan

coil unit, or manifold. If an elbow

is required, install this prior to

installing the barb.

4. Slide the clamp over the Onix and

then the Onix over the entire barb.

ONIX BARBS AND SURECLAMPS

ONIX SIZE (id) ONIX BARB ONIX ELBOW SURECLAMP SELFTITE CLAMP

1/2” # 086081 # 185074 # 6642123 # 663022

5/8” # 086101 # 185625 # 6642527 # 663024

3/4” # 086121 # 185075 # 6642931 # 663029

1” # 086161X N/A # 6643740 N/A

BASEBOARD - BTU/FT

(estimated maximum output)

3/4” 1” 1-1/4”

160°F 520 560 610

170°F 600 650 700

180°F 680 730 790

190°F 760 830 900

0.0001

0.001 0.01 0.10.03 1.0

3/8" Tubing

1/2" Tubing

5/8" Tubing

3/4" Tubing

40,000

30,000

20,000

10,000

9,000

8,000

7,000

6,000

5,000

4,000

3,000

2,000

1,000

900

800

700

600

500

0.9

0.8

0.7

0.6

0.5

0.4

0.3

0.2

0.1

0.09

0.08

0.07

0.06

0.05

PRESSURE DROP (Feet of Head Pressure Drop per Lineal Foot of Tubing)

1 ft/sec

2 ft/sec

3 ft/sec

7 ft/sec

1.5 ft/sec

5 ft/sec

Watts Radiant PRESSURE DROP CHART FOR Onix

Pure Water

1.25 ft/sec

4 ft/sec

6 ft/sec

FLOW RATE (GPM) AT 20 F T

HEAT REQUIRED (BTU/h) FOR AREA SERVED BY ONE CIRCUIT

50,000

60,000

70,000

80,000

90,000

100,000

1" Tubing

FAN COILS - BTU

(estimated maximum output)

1 gpm 3 gpm 5 gpm

160°F 6500 7100 7300

170°F 7400 8000 8200

180°F 8000 8600 8950

190°F 8400 9000 9400

5a.SureClamp: tighten to 25-30

in-lbs. If a torque wrench is not

available, tighten the clamps to

snug and then one additional

quarter turn.

5b.SeftTite: open with a pair of

SqueezeTite pliers, making sure

not to over expand the clamp.

Follow additional installation instructions includ-

ed with the Onix fittings and clamps.

TYPICAL FLOW RATES AND PRESSURE DROPS

Support Onix

within 6” on either

side of a bend with

StrapDowns or SnapClips.

Supports need to be placed every 24-

32” when hanging Onix in a horizontal posi-

tion.

Watts Onix Coils Installation guide

Watts Onix Coils Installation guide

Watts Onix Coils Installation guide

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