Chromalox HWM Catalog Page

HWM

Hot Water Maintenance

Heating Cable

D

Heat Trace Cable

• Hot Water Maintenance for
Temperatures up to 140°F

• Heat Output Varies Along Pipe
Length to Deliver Heat Where
Needed

• Circuit Lengths up to 800 ft

• 16 Awg Buss Wires

• Self-Regulating Conductive Core

• Fluoropolymer Jackets

• Wattages at 5 and 10 w/ft

• 120 and 208-277 V Cable
Available from Stock

Description

The HWM hot water temperature mainte­nance system utilizes self-regulating heat
trace technology. The system, consisting of
the self-regulating cable, connection kits and
specialized electronic controls, provides com­mercial buildings with immediate hot water
availability without expensive recirculation
systems. It provides a simple, yet energy ef­ficient approach by providing heat at the point
where heat loss occurs. Due to the parallel
construction of the self-regulating cable, it can
be cut to any length, spliced, tee-branched and
terminated on site. With this product, energy
savings may be derived from multiple sources,
such as lower supply line heat loss, eliminated
return line heat loss, no pump operating costs
and no supply water overheating costs.

E C B A

Cut to Length

in Field

Can be

Overlapped

Features

• Energy efficient, self-regulating HWM uses
less energy when less heat is required.

• Easy to install, HWM can be cut to any
length (up to max. circuit length) in the field.

• Field splices can be performed easily in min­utes with no scrap or wasted cold sections.

• HWM can be overlapped without burnout,
which simplifies heat tracing of in-line equip­ment such as valves.

• Because HWM is self-regulating, over-tem­perature conditions are minimized.

• Chromalox termination, splice, tee and end
seal kits reduce installation time.

Construction

A

Twin 16 AWG Copper Buss Wires – Pro-

vide reliable electric current capability.

B

Semiconductive Polymer Core Matrix

– “Self-Regulating” component of the
cable its electrical resistance varies with
temperature. As process temperature
drops,the core’s heat output increases; as
process temperature rises, the heat output
decreases.

Maintains up to

140°F

Withstands up to

275°F

Medium Tem-

perature

C

Flame Retardant – Electrically insulates

the matrix and provides corrosion resis­tance.

D

Metallic Grounding Braid – Provides

additional mechanical protection and a
positive ground path.

E

Fluoropolymer Outer Jacket – Corrosion

resistant, flame retardant overjacket is
highly effective in many environments.
Protects against exposure to organic or
corrosive solutions. The overjacket also
protects against abrasion and impact
damage.

Output

Temperature

Self Regulating

Output

Approvals

FM approved for hot water maintenance ap­plications

FREEZE

PROTECTION

WARNING — A ground fault protection device
is required by NEC to minimize the danger of
fire if the heating cable is damaged or improp­erly installed. A minimum trip level of 30mA is
recommended to minimize nuisance tripping.

G-43

Heating Cable

HWM

Hot Water Maintenance
Heat Trace Cables

(cont’d.)

Insulation Requirement

Required thickness of fiberglass insulation is determined by nominal pipe size.

Fiberglass Insulation Thickness Selection

Pipe size (in) Insulation Thickness (in)

1/2 1

3/4 1

1 1

1 1/4 1

1-1/2 1-1/2

2 2

HWM Tracing Selection

To select the proper HWM cable for your applications, use the tables below.

Cable Selection

120V, 240V or 277V

Maintain Temperature (°F) Cable

105 HWM 5

115 HWM 10

125 HWM 10

140 HWM 10

208V

Maintain Temperature (°F) Cable

105 HWM 5

115 HWM 10

125 HWM 10

140 HWM 10

G-44

Maximum Circuit Length (Ft.)

Maximum Circuit Length ft

15A 20A 30A

HWM5-1CT 200 270 400

HWM5-2CT 400 540 800

HWM10-1CT 130 155 220

HWM10-2CT 260 310 440