fire sprinkler system freeze protection — xl-trace

FIRE SPRINKLER SYSTEM FREEZE
PROTECTION ­— XL-TRACE SYSTEM
This step-by-step design guide provides the tools necessary to design a Raychem XL-Trace fire sprinkler freeze protection system. For other applications or for design
assistance, contact your Thermal Management representative or call (800) 545‑6258.
Also, visit our web site at www.pentairthermal.com.
Contents
Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
How to Use this Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Safety Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Approvals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Self-Regulating Heating Cable Construction. . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Fire Suppression System Freeze Protection Applications. . . . . . . . . . . . . . . . . . . . . . 5
Typical Pipe Freeze Protection System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Fire Supply Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Sprinkler Standpipes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Branch Lines with Sprinklers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Freezer Application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Fire Suppression System Freeze Protection Design . . . . . . . . . . . . . . . . . . . . . . . . . 11
Design Step by Step . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Step 1 Determine design conditions and pipe heat loss. . . . . . . . . . . . 12
Step 2 Select the heating cable. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Step 3 Determine the heating cable length . . . . . . . . . . . . . . . . . . . . . . 19
Step 4 Determine the electrical parameters . . . . . . . . . . . . . . . . . . . . . 21
Step 5 Select the connection kits and accessories . . . . . . . . . . . . . . . . 24
Step 6 Select the control system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Step 7 Complete the Bill of Materials . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Installation and Maintenance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
XL-Trace System Fire Sprinkler System Freeze Protection Design Worksheet . . . 32
INTRODUCTION
This design guide presents Thermal Management’ recommendations for designing
an XL-Trace pipe freeze protection system for fire sprinkler piping. It provides design
and performance data, control options, electrical sizing information, and application
configuration suggestions. This guide does not give information on how to design
your fire protection system.
This guide does not cover applications in which any of the following conditions exist:
• Hazardous locations, as defined in national electrical codes
• Supply voltage other than 120 V or 208–277 V
If your application conditions are different, or if you have any questions, contact your
Thermal Management representative or call (800) 545‑6258.
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
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Fire Sprinkler System Freeze Protection ­— XL-Trace System
How to Use this Guide
This design guide takes you step by step through designing a freeze protection
system for fire suppression piping. Following these recommendations will result in a
reliable, energy-efficient system.
OTHER REQUIRED DOCUMENTS
This guide is not intended to provide comprehensive installation instructions. For
complete system installation instructions, please refer to the following additional
required documents:
• XL-Trace System Installation and Operation Manual (H58033)
• Additional installation instructions are included with the connection kits,
controllers, and accessories
If you do not have the above documents, you can obtain them from the Thermal
Management web site at www.pentairthermal.com.
For products and applications not covered by this design guide, please contact your
Thermal Management representative or call (800) 545-6258.
Safety Guidelines
As with any electrical equipment, the safety and reliability of any system depends
on the quality of the products selected and the manner in which they are installed
and maintained. Incorrect design, handling, installation, or maintenance of any of
the system connection kits could damage the system and may result in inadequate
performance, overheating, electric shock, or fire. To minimize these risks and to
ensure that the system performs reliably, read and carefully follow the information,
warnings, and instructions in this guide.
This symbol identifies important instructions or information.
This symbol identifies particularly important safety warnings that must be
followed.
WARNING: To minimize the danger of fire from sustained electrical arcing
if the heating cable is damaged or improperly installed, and to comply with
the requirements of Thermal Management, agency certifications, and national
electrical codes, ground-fault equipment protection must be used on each heating
cable branch circuit. Arcing may not be stopped by conventional circuit protection.
Warranty
Thermal Management’ standard limited warranty applies to all products.
An extension of the limited warranty period to ten (10) years from the date of
installation is available if a properly completed online warranty form is submitted
within thirty (30) days from the date of installation. You can access the complete
warranty on our web site at www.pentairthermal.com.
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Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
SYSTEM OVERVIEW
The XL-Trace system is designed to freeze protect aboveground and buried supply
pipes, fire standpipes, branch lines and branch lines containing sprinklers when run
in areas subject to freezing.
Thermal Management offers the option of three self-regulating heating cables with
the XL-Trace system; 5XL, 8XL, and 12XL for applications using 120 V and 208–277
V power supplies. The XL-Trace system is based on self-regulating heating cable
technology whereby the heating cable’s output is reduced automatically as the pipe
warms; eliminating the possibility of sprinkler system overheating.
An XL-Trace system includes the heating cable, power connection, splice, tee
connections, controls, power distribution panels, accessories, and the tools
necessary for a complete installation.
Approvals
NFPA 13 (Standard for the Installation of Sprinkler Systems) allows Listed electrical
heat tracing to freeze protect fire suppression systems including supply lines,
standpipes and branch lines containing sprinklers. XL-Trace is c-CSA-us Certified
for use on fire suppression systems under CSA C22.2 No. 130-03 for Canada and
IEEE 515.1-2005 for the US. The system covered in this manual includes supply
lines, stand pipes, branch lines and sprinkler heads.
THERMAL MANAGEMENT
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Fire Sprinkler System Freeze Protection ­— XL-Trace System
Self-Regulating Heating Cable Construction
Raychem XL-Trace self-regulating heating cables are comprised of two parallel
nickel-plated bus wires in a cross-linked polymer core, a tinned copper braid, and a
fluoropolymer or polyolefin outer jacket. These cables are cut to length, simplifying
the application design and installation.
Polyolefin or
fluoropolymer outer jacket
Tinned-copper braid
Modified polyolefin inner jacket
Self-regulating conductive core
Nickel-plated copper bus wire
Fig. 1 XL-Trace heating cable construction
With self-regulating technology, the number of electrical paths between bus wires
changes in response to temperature fluctuations. As the temperature surrounding
the heater decreases, the conductive core contracts microscopically. This contraction
decreases electrical resistance and creates numerous electrical paths between the
bus wires. Current flows across these paths to warm the core.
As the temperature rises, the core expands microscopically. This expansion
increases electrical resistance and the number of electrical paths decreases. The
heating cable automatically reduces its output.
At high temperature,
there are few
conducting paths
and output is
correspondingly
lower, conserving
energy during
operation.
The following graphs illustrate the response of self-regulating heating
cables to changes in temperature. As the temperature rises, electrical
resistance increases, and our heaters reduce their power output.
Power
re
g
ul
at
in
g
Constant wattage
Se
lf-
At moderate temperature,
there are fewer conducting
paths because the heating
cable efficiently adjusts by
decreasing output, eliminating
any possibility of overheating.
Resistance
At low temperature,
there are many
conducting paths,
resulting in high output
and rapid heat-up. Heat
is generated only when it
is needed and precisely
where it is needed.
Temperature
Constant wattage
Se
lf-
re
g
ul
at
ing
Temperature
Fig. 2 Self-regulating heating cable technology
4 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
FIRE SUPPRESSION SYSTEM FREEZE PROTECTION APPLICATIONS
A freeze protection system is designed to maintain water temperature at a minimum
of 40°F (4°C) to prevent fire suppression piping from freezing.
Typical Pipe Freeze Protection System
A typical freeze protection system includes the XL-Trace self-regulating heating
cables, connection kits, temperature control, and power distribution.
Line sensing RTD
Ambient sensing RTD
RayClic-LE
lighted end seal
XL-Trace
Thermal insulation
Raychem C910-485
electronic
controller
RayClic-S splice
Standpipe
RayClic-PC
power connection
Control valves
in heated enclosure
Fire
alarm
panel
Power
distribution
panel
Ground
Fig. 3 Typical XL-Trace pipe freeze protection system
THERMAL MANAGEMENT
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Fire Sprinkler System Freeze Protection ­— XL-Trace System
Fire Supply Lines
XL-Trace is designed to maintain fire supply lines at 40°F (4°C) in areas subject to
freezing.
ABOVEGROUND SUPPLY PIPING
Junction
box
Raychem C910-485
Electronic controller
RayClic-PC
power connection
RayClic-LE
lighted end seal
(optional)
RayClic-S
splice
Insulation
XL-Trace
heating cable
RayClic-T
tee
RayClic-E
end seal
Fig. 4 Typical aboveground supply piping system
Application Requirements
The system complies with Thermal Management requirements for aboveground
general water piping when:
• The heating cable is permanently secured to insulated metal pipes with GT-66
glass tape or to plastic pipes using AT-180 aluminum tape.
• Raychem C910-485 or ACS-30 controllers with integrated ground-fault protection
and alarm contacts are used and are connected to a fire control panel.
• The heating cable is installed per manufacturer’s instructions with approved
Raychem connection kits. See Table 11 on page 25 and the XL-Trace System
Installation and Operation Manual (H58033).
Approvals
UL Listed and c-CSA-us Certified for nonhazardous locations.
-w
5XL1-CR, -CT
5XL2-CR, -CT
6 / 40
8XL1-CR, -CT
8XL2-CR, -CT
5XL1-CR, -CT
5XL2-CR, -CT
8XL1-CR, -CT 12XL2-CR, -CT
8XL2-CR, -CT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
BURIED PIPING
Raychem C910-485
Electronic controller
Alternate
end seal
Wall
Conduit
RayClic-LE*
FTC-XC
power
connection
with wall
mounting
bracket
Conduit for
temperature
sensor
Ground
Temperature sensor
Junction box
Insulation RayClic-E
end seal
RayClic-PC* Ground
Conduit
with wall
mounting
bracket
XL-Trace
heating cable
with -CT jacket
Alternate
power connection
*To protect the heating cable, run cable
inside Convolex tubing between the
conduit and the RayClic connection kits.
Wall
Fig. 5 Typical buried piping system
Application Requirements
The system complies with Thermal Management requirements for use on buried
insulated metal or plastic pipe when:
• The heating cable is permanently secured to insulated metal pipes with GT-66
glass tape or to plastic pipes using AT-180 aluminum tape.
• The pipeline is buried at least 2-feet deep.
• The heating cable has a fluoropolymer outer jacket (-CT).
• All heating cable connections (power, splice, tee, and end termination) are made
aboveground. No buried or in-conduit splices or tees are allowed.
• The power connection and end seal are made in UL Listed and CSA Certified
junction boxes, or RayClic connection kits, above grade.
• The heating cable is protected from the pipe to the power connection box in UL
Listed and CSA Certified water-sealed conduit (minimum 3/4-inch diameter) suitable for the location.
• Raychem C910-485 or ACS-30 controllers with integrated ground-fault protection
and alarm contacts are used and are connected to a fire control panel.
• Closed-cell, waterproof thermal insulation with fire-retardant, waterproof covering approved for direct burial is used.
• The heating cable is installed per manufacturer’s instructions with approved
Thermal Management connection kits. See Table 13 on page 27 and the XLTrace System Installation and Operation Manual (H58033).
Approvals
UL Listed and c-CSA-us Certified for nonhazardous locations.
-w
5XL1-CT
5XL2-CT
THERMAL MANAGEMENT
8XL1-CT
8XL2-CT
5XL1-CT
5XL2-CT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
8XL1-CT
8XL2-CT
12XL2-CT
7 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Sprinkler Standpipes
XL-Trace is designed to maintain fire suppression system standpipes at 40°F (4°C) in
areas subject to freezing.
FOR ABOVEGROUND STANDPIPES
Line sensing RTD
Ambient sensing RTD
RayClic-LE
lighted end seal
Thermal insulation
XL-Trace
RayClic-S splice
Refer to Branch
Lines with
Sprinkler section
for information on
heat tracing
sprinkler heads.
Raychem C910-485
electronic
controller
Standpipe
RayClic-PC
power connection
Control valves
in heated enclosure
Power
distribution
panel
Fire
alarm
panel
Ground
Fig. 6 Standard sprinkler standpipe heating system layout
Application Requirements
The system complies with Thermal Management requirements for freeze protection
of sprinkler system piping when:
• The heating cable is permanently secured to insulated metal pipes with GT-66
glass tape or to plastic pipes using AT-180 aluminum tape.
• Schedule 5, 10, 20, or 40 steel sprinkler standpipe up to and including 20 inches
in diameter is used.
• UL Listed fiberglass or closed cell flame-retardant insulation with weatherproof
cladding is used.
• Raychem C910-485 or ACS-30 controllers with integrated ground-fault protection
and alarm contacts are used and are connected to a fire control panel.
• The heating cable is installed per manufacturer’s instructions with approved
Thermal Management connection kits. See Table 11 on page 25 and the XL-Trace
System Installation and Operation Manual (H58033).
Approvals
UL Listed and c-CSA-us Certified for nonhazardous locations.
-w
5XL1-CR, -CT
5XL2-CR, -CT
8 / 40
8XL1-CR, -CT
8XL2-CR, -CT
5XL1-CR, -CT
5XL2-CR, -CT
8XL1-CR, -CT 12XL2-CR, -CT
8XL2-CR, -CT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Branch Lines with Sprinklers
XL-Trace is designed to maintain branch lines containing sprinklers at 40°F (4°C) in
areas subject to freezing.
End seal
Tee
Cross
Sprinkler
Insulation
Line sensing
RTD
Splice
Power
connection
RayClic-LE
lighted end seal
(optional)
Junction
box
Ambient
sensing
RTD
Raychem
C910-485
Fig. 7 Typical fire suppression system for branch lines with sprinklers
Application Requirements
The system complies with Thermal Management requirements for fire suppression
branch lines with sprinklers when:
• The heating cable is permanently secured to metal pipes with GT-66 glass tape,
or to plastic pipes using AT-180 aluminum tape.
• Raychem C910-485 or ACS-30 controllers with integrated ground-fault protection
with alarm contacts are used and are connected to a fire control panel.
• The sprinkler design accounts for the sprinkler shadow created by the outer diameter of the thermal pipe insulation.
• Closed-cell, waterproof thermal insulation with fire-retardant, waterproof covering is used.
• The heating cable is installed per manufacturer’s instructions with approved
Thermal Management connection kits. See Table 13 on page 27 and the XLTrace System Installation and Operation Manual (H58033).
• Additional heating cable is installed to compensate for sprinkler heads, sprigs,
valves and pipe supports as detailed in the Table 6 on page 20 of this document
and the XL‑Trace System Installation and Operation Manual (H58033).
THERMAL MANAGEMENT
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Fire Sprinkler System Freeze Protection ­— XL-Trace System
Approvals
c-CSA-us Certified for use in U.S. and Canada in nonhazardous locations.
-w
5XL1-CR, -CT
5XL2-CR, -CT
Freezer Application
8XL1-CR, -CT
8XL2-CR, -CT
XL-Trace is designed to keep condensate in dry sprinklers from freezing and may be
installed in freezers located in areas subject to freezing.
Thermal insulation
RTD
Building
XL-Trace
Raychem
C910-485
electronic
controller
Freezer
Fire
alarm
panel
Power
distribution
panel
Fig. 8 Typical fire suppression system for freezer applications
Application Requirements
The system complies with Thermal Management requirements for fire suppression
systems for freezer applications when:
• The system is for freezer and freezer within a freezer applications.
• The heating cable is permanently secured to metal pipes with GT-66 glass tape,
or to plastic pipes using AT-180 aluminum tape.
• Raychem C910-485 or ACS-30 controllers with integrated ground-fault protection
and alarm contacts are used and are connected to a fire control panel.
• Closed-cell, waterproof thermal insulation with fire-retardant, waterproof covering is used for pipes and sprigs in areas subject to freezing.
• The sprinkler design accounts for sprinkler shadow created by the outer diameter
of the thermal pipe insulation.
• The heating cable is installed per manufacturer’s instructions with approved
Thermal Management connection kits. See Table 13 on page 27 and the XLTrace System Installation and Operation Manual (H58033).
• Additional heating cable is installed to compensate for sprinkler heads, sprigs,
valves and pipe supports as detailed in the Table 6 on page 20 of this document
and the XL‑Trace System Installation and Operation Manual (H58033).
Approvals
c-CSA-us Certified for use in U.S. and Canada in nonhazardous locations.
-w
5XL1-CR, -CT
5XL2-CR, -CT
10 / 40
8XL1-CR, -CT
8XL2-CR, -CT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
FIRE SUPPRESSION SYSTEM FREEZE PROTECTION DESIGN
This section details the design steps necessary to design your application. The
examples provided in each step are intended to incrementally illustrate the project
parameter output for two sample designs from start to finish. As you go through
each step, use the “XL-Trace System Fire Sprinkler System Freeze Protection Design
Worksheet,” page 32, to document your project parameters, so that by the end of
this section you will have the information you need for your Bill of Materials.
TraceCalc Pro for Buildings is an online design tool available to help you create
simple or complex heat-tracing designs for pipe freeze protection or flow
maintenance applications. It is available at http://www.pentairthermal.com.
Design Step by Step
Your system design requires the following essential steps.
 Determine design conditions and pipe heat loss
 Select the heating cable
 Determine the heating cable length
 Determine the electrical parameters
 Select the connection kits and accessories
 Select the control system
 Complete the Bill of Materials
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Fire Sprinkler System Freeze Protection ­— XL-Trace System
Pipe Freeze Protection
and Flow Maintenance
1. Determine design
conditions and
pipe heat loss
2. Select the heating
cable
3. Determine the
heating cable length
4. Determine the
electrical parameters
5. Select the
connection kits
and accessories
6. Select the control
system
7. Complete the Bill
of Materials
Step 1 Determine design conditions and pipe heat loss
Collect the following information to determine your design conditions:
• Location
–– Indoors
–– Outdoors
–– Aboveground
–– Buried
• Maintain temperature (Tm)
• Minimum ambient temperature (Ta )
• Pipe diameter and material
• Pipe length
• Thermal insulation type and thickness
• Supply voltage
Example: Fire Standpipe
Location
Aboveground, outdoors
Maintain temperature (Tm)
40°F (4°C)
Minimum ambient temperature (Ta )
–20°F (–29°C)
Pipe diameter and material
10-inch metal
Pipe length
50 ft (16.4 m)
Thermal insulation type and thickness
1 1/2-inch fiberglass
Supply voltage
208 V
Branch Line with Sprinkler
LocationIndoors
12 / 40
Maintain temperature (Tm)
40°F (4°C)
Minimum ambient temperature (Ta )
0°F (–18°C)
Pipe diameter and material
1-inch metal
Pipe length
200 ft (61 m)
Thermal insulation type and thickness
1/2-inch closed-cell foamed elastomer
Supply voltage
208 V
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
PIPE HEAT LOSS CALCULATIONS
To select the proper heating cable you must first determine the pipe heat loss. To
do this you must first calculate the temperature differential (ΔT) between the pipe
maintain temperature and the minimum ambient temperature.
+40
+20
0
−20
−40
Thermal insulation thickness
Pipe or
tubing
diameter
80
60
40
20
°F
Minimum
ambient
temperature
°F
Maintain
temperature
Fig. 9 Pipe heat loss
Calculate temperature differential ΔT
To calculate the temperature differential ΔT), use the formula below:
ΔT = Tm – Ta
Example: Fire Standpipe
Tm
40°F (4°C)
Ta
–20°F (–29°C)
ΔT = 40°F – (–20°F) = 60°F
ΔT = 4°C – (–29°C) = 33°C
Example: Branch Line with Sprinkler
Tm 40°F (4°C)
Ta 0°F (-18°C)
ΔT = 40°F – (0°F) = 40°F
ΔT = 4°C – (–18°C) = 22°C
Determine the pipe heat loss
Match the pipe size, insulation thickness, and temperature differential (ΔT) from
Table 1 on page 15 to determine the base heat loss of the pipe (Qb).
Example: Fire Standpipe
Pipe diameter
10 inch
Insulation thickness 1 1/2 inch
ΔT
60°F (33°C)
Heat loss (Qb) for 60°F must be calculated through interpolation between ΔT at 50°F
and ΔT at 100°F from Table 1. For difference between the ΔT of 50°F and the ΔT of
100°F:
Qb-50
8.1 W/ft (from Table 1)
Qb-100
16.8 W/ft (from Table 1)
ΔT interpolation
ΔT 60°F is 20% of the distance between ΔT 50°F and ΔT 100°F
Qb-60
Qb-50 + [0.20 x (Qb-100 – Qb-50)] = 8.1 + [0.20 x (16.8 – 8.1)] = 9.8 W/ft
Pipe heat loss (Qb) 9.8 W/ft @ Tm 40°F (32.1 W/m @ Tm 4°C)
THERMAL MANAGEMENT
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Fire Sprinkler System Freeze Protection ­— XL-Trace System
Example: Branch Line with Sprinkler
Pipe diameter
1 inch
Insulation thickness 1/2 inch
ΔT
40°F (22°C)
Qb for 40°F must be calculated through interpolation between ΔT at 20°F and ΔT at
50°F from Table 1. For difference between the ΔT of 20°F and the ΔT of 50°F:
Qb-20
1.4 W/ft (from Table 1)
Qb-50
3.5 W/ft (from Table 1)
ΔT interpolation
ΔT 40°F is 67% of the distance between ΔT 20°F and ΔT 50°F
Qb-40
Qb-50 + [0.67 x (Qb-50 – Qb-20)] = 1.4 + [0.67 x (3.5 – 1.4)] = 2.8 W/ft
Pipe heat loss Qb
2.8 W/ft @ Tm 40°F (9.2 W/m @ Tm 4°C)
Compensate for insulation type and pipe location
The base heat loss is calculated for a pipe insulated with thermal insulation with a
k-factor ranging from 0.2 to 0.3 BTU/hr–°F–ft2/in (fiberglass or foamed elastomer)
in an outdoor, or buried application. To get the heat loss for pipes insulated with
alternate types of thermal insulation and for pipes installed indoors, multiply the
base heat loss of the pipe (Qb) from Step 3 by the insulation multiple from Table 3 on
page 16 and the indoor multiple from Table 2 on page 16 to get the corrected
heat loss:
Qcorrected = Qb x Insulation multiple x Indoor multiple
Example: Fire Standpipe
Location
Aboveground, outdoors
Thermal insulation thickness and type 1 1/2-inch fiberglass
Pipe heat loss Qb
9.8 W/ft @ Tm 40°F (32.1 W/m @ Tm 4°C)
Qcorrected 9.8 W/ft x 1.00 x 1.00 = 9.8 W/ft @ Tm 40°F
(32.1 W/m @ Tm 4°C)
Example: Branch Line with Sprinkler
Location
Aboveground, indoors
Thermal insulation type and thickness 1/2-inch closed cell foamed elastomer
Pipe heat loss Qb =
2.8 W/ft @ Tm 40°F (9.2 W/m @ Tm 4°C)
Qcorrected =
2.8 W/ft x 1.0 x 0.79 = 2.20 W/ft @ Tm 410°F
(7.3 W/m @ Tm 4°C)
14 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Table 1 PIPE HEAT LOSS (Qb) FOR OUTDOOR OR BURIED PIPE (W/FT) FOR 1/2 TO 3-1/2 INCHES
Insulation
thickness
(in)
0.5
1.0
1.5
2.0
2.5
3.0
4.0
(ΔT)
Pipe diameter (IPS) in inches
°F
°C
1/2
3/4
1
1-1/4
1-1/2
2
2-1/2
3
3-1/2
20
11
1.0
1.2
1.4
1.6
1.8
2.2
2.5
3.0
3.4
50
28
2.5
2.9
3.5
4.1
4.6
5.5
6.5
7.7
8.6
100
56
5.2
6.1
7.2
8.6
9.6
11.5
13.5
16.0
18.0
150
83
8.1
9.5
11.2
13.4
14.9
17.9
21.1
25.0
28.1
20
11
0.6
0.7
0.8
1.0
1.1
1.3
1.5
1.7
1.9
50
28
1.6
1.9
2.2
2.5
2.8
3.2
3.8
4.4
4.9
100
56
3.4
3.9
4.5
5.2
5.8
6.8
7.8
9.1
10.2
150
83
5.3
6.1
7.0
8.2
9.0
10.6
12.2
14.2
15.9
20
11
0.5
0.6
0.7
0.8
0.8
1.0
1.1
1.3
1.4
50
28
1.3
1.5
1.7
1.9
2.1
2.4
2.8
3.2
3.6
100
56
2.8
3.1
3.5
4.0
4.4
5.1
5.8
6.7
7.4
150
83
4.3
4.8
5.5
6.3
6.9
8.0
9.1
10.5
11.6
20
11
0.5
0.5
0.6
0.6
0.7
0.8
0.9
1.0
1.1
50
28
1.1
1.3
1.4
1.6
1.8
2.0
2.3
2.6
2.9
100
56
2.4
2.7
3.0
3.4
3.7
4.2
4.8
5.5
6.0
150
83
3.7
4.2
4.7
5.3
5.8
6.6
7.5
8.5
9.4
20
11
0.4
0.5
0.5
0.6
0.6
0.7
0.8
0.9
1.0
50
28
1.0
1.2
1.3
1.4
1.6
1.8
2.0
2.3
2.5
100
56
2.2
2.4
2.7
3.0
3.3
3.7
4.2
4.7
5.2
150
83
3.4
3.7
4.2
4.7
5.1
5.8
6.5
7.4
8.1
20
11
0.4
0.4
0.5
0.5
0.6
0.6
0.7
0.8
0.9
50
28
1.0
1.1
1.2
1.3
1.4
1.6
1.8
2.0
2.2
100
56
2.0
2.2
2.4
2.7
2.9
3.3
3.7
4.2
4.6
150
83
3.1
3.4
3.8
4.3
4.6
5.2
5.8
6.6
7.1
20
11
0.3
0.4
0.4
0.5
0.5
0.5
0.6
0.7
0.7
50
28
0.9
0.9
1.0
1.1
1.2
1.4
1.5
1.7
1.8
100
56
1.8
2.0
2.1
2.4
2.5
2.9
3.2
3.5
3.8
150
83
2.8
3.0
3.4
3.7
4.0
4.4
4.9
5.5
6.0
Note: Multiply the W/ft heat loss values by 3.28 for W/m.
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
15 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
TABLE 1 CONTINUED PIPE HEAT LOSS (Qb) FOR OUTDOOR OR BURIED PIPE (W/FT) FOR 4 TO 20 INCHES
Insulation
thickness
(in)
0.5
1.0
1.5
2.0
2.5
3.0
4.0
(ΔT)
Pipe diameter (IPS) in inches
°F
°C
4
6
8
20
11
3.8
5.3
6.8
10
12
14
16
18
20
8.4
9.9
10.8
12.2
13.7
15.2
50
28
9.6
13.6
17.4
21.4
25.2
27.5
31.3
35.0
38.8
100
56
20.0
28.4
36.3
44.6
52.5
57.4
65.2
73.0
80.8
150
83
31.2
44.3
56.6
69.6
81.9
89.5
101.7
113.8
126.0
20
11
2.1
2.9
3.7
4.5
5.3
5.8
6.5
7.3
8.0
50
28
5.4
7.5
9.4
11.5
13.5
14.7
16.6
18.6
20.5
100
56
11.2
15.6
19.7
24.0
28.1
30.6
34.7
38.7
42.8
150
83
17.5
24.3
30.7
37.4
43.8
47.8
54.1
60.4
66.7
20
11
1.5
2.1
2.6
3.2
3.7
4.0
4.5
5.0
5.5
50
28
3.9
5.3
6.7
8.1
9.4
10.2
11.5
12.9
14.2
100
56
8.1
11.1
13.9
16.8
19.6
21.3
24.0
26.8
29.5
150
83
12.7
17.3
21.6
26.2
30.5
33.2
37.5
41.8
46.1
20
11
1.2
1.7
2.1
2.5
2.9
3.1
3.5
3.9
4.3
50
28
3.1
4.2
5.2
6.3
7.3
7.9
8.9
9.9
10.9
100
56
6.6
8.8
10.9
13.1
15.2
16.5
18.6
20.7
22.8
150
83
10.2
13.8
17.0
20.5
23.8
25.8
29.0
32.3
35.5
20
11
1.1
1.4
1.7
2.1
2.4
2.6
2.9
3.2
3.5
50
28
2.7
3.6
4.4
5.2
6.1
6.6
7.4
8.2
9.0
100
56
5.6
7.4
9.1
10.9
12.6
13.7
15.3
17.0
18.7
150
83
8.7
11.6
14.2
17.0
19.7
21.3
23.9
26.5
29.1
20
11
0.9
1.2
1.5
1.8
2.0
2.2
2.5
2.7
3.0
50
28
2.4
3.1
3.8
4.5
5.2
5.6
6.3
7.0
7.6
100
56
4.9
6.5
7.9
9.4
10.8
11.7
13.1
14.5
15.9
150
83
7.7
10.1
12.4
14.7
16.9
18.3
20.5
22.6
24.8
20
11
0.8
1.0
1.2
1.4
1.6
1.7
1.9
2.1
2.3
50
28
2.0
2.5
3.1
3.6
4.1
4.4
5.0
5.5
6.0
100
56
4.1
5.3
6.4
7.5
8.6
9.3
10.3
11.4
12.4
150
83
6.4
8.3
10.0
11.8
13.4
14.5
16.1
17.8
19.4
Note: Multiply the W/ft heat loss values by 3.28 for W/m.
Table 2 INDOOR PIPE HEAT LOSS MULTIPLES
Fiberglass thickness (in)
Indoor multiple
0.5
0.79
1
0.88
1.5
0.91
2
0.93
2.5
0.94
3
0.95
4
0.97
Table 3 INSULATION HEAT LOSS MULTIPLES
k factor at 50°F (10°C) (BTU/hr–°F–ft2/in)
Insulation multiple
Examples of preformed pipe insulation
0.1–0.2
0.6
Rigid cellular urethane (ASTM C591)
0.2–0.3
1
Glass fiber (ASTM C547)
Foamed elastomer (ASTM C534)
0.3–0.4
1.4
Cellular glass (ASTM C552)
Mineral fiber blanket (ASTM C553)
16 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Pipe Freeze Protection
and Flow Maintenance
Step 2 Select the heating cable
To select the appropriate XL-Trace heating cable for your application, you must
determine your cable supply voltage, power output, and outer jacket. Once you have
selected these, you will be able to determine the catalog number for your cable.
1. Determine design
conditions and
pipe heat loss
2. Select the heating
cable
HEATING CABLE CATALOG NUMBER
3. Determine the
heating cable length
Before beginning, take a moment to understand the structure of the heating cable
catalog numbers. You will refer to this numbering convention throughout the
product selection process. Your goal is to determine the catalog number for the
product that best suits your needs.
4. Determine the
electrical parameters
5. Select the
connection kits
and accessories
Catalog number: 5, 8 or 12 XL
6. Select the control
system
1 or 2 -CR
-CT
Power output (W/ft)
7. Complete the Bill
of Materials
Product family
Voltage
1 = 120 V (only available for 5 or 8)
2 = 208, 240, 277 V (available for 5, 8, or 12)
Jacket type: Polyolefin
or
Fluoropolymer (required for buried pipes)
Fig. 10 Heating cable catalog number
Select the heating cable from Fig. 11 that provides the required power output to
match the corrected heat loss for your application. Fig. 11 shows the power output
for the heating cables on metal pipe at 120/208 volts. To correct the power output
for other applied voltage or plastic pipes multiply the power output at the desired
maintain temperature by the factors listed in Table 4 on page 18. If the pipe heat
loss, Qcorrected, is between the two heating cable power output curves, select the
higher-rated heating cable.
14

12
Power W/ft
10

8
6

4
2
0
30
(–1)
40
(5)
50
(10)
60
(15)
70
(21)
80
(27)
90
(32)
100
(38)
110
(43)
120
(49)
130 °F
(54) (°C)
Pipe temperature

5XL1-CR and 5XL1-CT (120 V)
5XL2-CR and 5XL2-CT (208 V)

8XL1-CR and 8XL1-CT (120 V)
8XL2-CR and 8XL2-CT (208 V)

12XL2-CR and 12XL2-CT (208 V)
Fig. 11 Heating cable power output on metal pipe
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
17 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Table 4 POWER OUTPUT CORRECTION FACTORS
Voltage correction factors
5XL1
8XL1
5XL2
8XL2
12XL2
120 V
1.00
1.00
–
–
–
208 V
–
–
1.00
1.00
1.00
240 V
–
–
1.12
1.12
1.14
277 V
–
–
1.29
1.27
1.30
0.75
0.75
0.75
0.75
0.75
Plastic pipe correction factor
(With AT-180 Aluminum tape)
Confirm that the corrected power output of the heating cable selected is greater
than the corrected pipe heat loss (Qcorrected). If Qcorrected is greater than the power
output of the highest-rated heating cable, you can:
• Use two or more heating cables run in parallel
• Use thicker insulation to reduce heat loss
• Use insulation material with a lower k factor to reduce heat loss
Example: Fire Standpipe
Pipe maintain temperature (Tm) 40°F (4°C) (from Step 1)
QcorrectedQcorrected = 9.8 W/ft @ Tm 40°F (32.1 W/m @ Tm 4°C)
Supply voltage
208 V (from Step 1)
Pipe material
Metal (from Step 1)
Select heating cable Qcorrected = 9.8 W/ft @ Tm 40°F (from Step 1)
12XL2 = 12.4 W/ft @ 40°F (from Fig. 11)
Supply voltage correction factor 1.00 (from Table 4)
Pipe material correction factor
Metal = 1.00 (from Table 4)
Corrected heating cable power
9.8 W/ft x 1.00 x 1.00 = 9.8 W/ft
Selected heating cable
12XL2
Example: Branch Line with Sprinkler
Pipe maintain temperature (Tm) 40°F (4°C) (from Step 1)
Qcorrected
2.8 W/ft x 1.0 x 0.97 = 2.2 W/ft @ Tm 40°F (7.3 W/m @ Tm 4°C)
Supply voltage
208 V (from Step 1)
Pipe material
Metal (from Step 1)
Select heating cable Qcorrected = 2.2 W/ft @ Tm 40°F (from Step 1)
5XL2 = 5.6 W/ft @ 40°F (from Fig. 11)
Supply voltage correction factor 1.00 (from Table 4)
18 / 40
Pipe material correction factor
Metal = 1.00
Corrected heating cable power
5.6 x 1.00 x 1.00 = 5.6 W/ft
Selected heating cable
5XL2
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
SELECT OUTER JACKET
Select the appropriate heating cable outer jacket for the application. Jacket options
are:
-CR Compatible with most XL-Trace applications
-CT Required for buried piping; may be used in other XL‑Trace applications for
improved mechanical strength and chemical resistance.
Example: Fire Standpipe
Location: Aboveground, outdoors
Selection:12XL2-CR
Example: Branch Line with Sprinkler
Location: Aboveground, indoors
Selection:5XL2-CR
Pipe Freeze Protection
and Flow Maintenance
Step 3 Determine the heating cable length
1. Determine design
conditions and
pipe heat loss
2. Select the heating
cable
3. Determine the
heating cable length
4. Determine the
electrical parameters
5. Select the
connection kits
and accessories
6. Select the control
system
7. Complete the Bill
of Materials
In Step 2 you selected the appropriate heating cable and the number of runs of
heating cable required for the pipe. Multiply the length of the pipe by the number of
heating cable runs for the heating cable length.
Heating cable length = Pipe length x No. heating cable runs
Additional heating cable will be required for heat sinks and connection kits. Use
Table 5 and Table 6 to determine the additional footage required for heat sinks
(valves, flanges, and pipe supports). You will determine the additional heating cable
for connection kits in Step 5. Round up fractional lengths to ensure heating cable
lengths are sufficient.
Total heating cable = (Pipe length x No. + Additional heating cable for heat sinks
heating cable runs)
(valves, pipe supports, and flanges)
length required
Table 5 ADDITIONAL HEATING CABLE FOR VALVES
Pipe diameter (IPS) inches
THERMAL MANAGEMENT
Heating cable feet (meters)
1/2
0.8
(0.24)
3/4
1.3
(0.4)
1
2.0
(0.6)
1-1/4
3.3
(1.1)
1-1/2
4.3
(1.3)
2
4.3
(1.3)
3
4.3
(1.3)
4
4.3
(1.3)
6
5.0
(1.5)
8
5.0
(1.5)
10
5.6
(1.7)
12
5.9
(1.9)
14
7.3
(2.2)
18
9.4
(2.9)
20
10.5
(3.2)
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
19 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Table 6 ADDITIONAL HEATING CABLE FOR PIPE SUPPORTS, FLANGES AND
SPRINKLERS
Support
Additional cable
Pipe hangers (insulated)
No additional heating cable
Pipe hangers (noninsulated) and
U-bolt supports
Add 2x pipe diameter
Welded support shoes
Add 3x the length of the shoe
Flanges
Add 2x pipe diameter
Sprinklers
Sprinkler without sprig
Add 4x pipe diameter
Sprinkler with sprig
Add 3x sprig length
Dry sprinkler for freezer application
Add 2x sprinkler length
Note: For applications where more than one heating cable is required per foot of pipe,
this correction factor applies for each cable run.
Example: Fire Standpipe
Pipe length
50 ft (60 m) (from Step 1)
Pipe diameter
10-inch metal (from Step 1)
Number of heating cable runs
1 (from Step 2)
Valves
1 control valve
5.6 ft x 1 valve = 5.6 ft (1.7 m)
Pipe supports
5 pipe hangers with U-bolts
10-inch pipe diameter = 10/12 = 0.83
[0.83 ft pipe diameter x 2] x 5 pipe supports
= 8.3 ft (2.5 m)
Flanges3
10-inch pipe diameter – 10/12 = 0.83 ft
[0.83 ft pipe diameter x 2] x 3 pipe supports
= 5.0 ft (1.5 m)
Total heating cable for heat sinks
5.6 ft (1.7 m) + 8.3 ft (2.5 m) + 5.0 ft (1.5 m)
= 18.9 ft (4.2 m) Rounded up to 19 ft (65 m)
Total heating cable length required 50 ft (15 m) x 1 run + 19 ft = 69 ft (21 m) of 12XL2-CR
Example: Branch Line with Sprinkler
Pipe length
200 ft (61 m) (from Step 1)
Pipe diameter
1-inch metal (from Step 1)
Number of heating cable runs
1 (from Step 2)
Valves
2 gate valves
[2.0 ft x 2 gate valves] x 1 run = 4.0 ft (1.2 m)
Pipe supports
10 noninsulated hangers
1-inch pipe diameter = 1 /12 = 0.1 ft
[0.1 ft pipe diameter x 2) x 10 pipe supports] x 1 run
= 2.0 ft (0.6 m)
Sprinklers
20 with 1 foot sprigs
[3 x 1 ft sprig] x 20 = 60 ft (18.3 m)
Total heating cable for heat sinks 4.0 ft (1.2 m) + 2.0 ft (0.6 m) + 60 ft (18.3 m)
= 66 ft (20.1 m)
Total heating cable length required 200 ft x 1 run + 66 ft = 266 ft (81 m) of 5XL2-CR
20 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Pipe Freeze Protection
and Flow Maintenance
Step 4 Determine the electrical parameters
To determine the electrical requirements for your application, you must determine
the number of circuits and calculate the transformer load.
1. Determine design
conditions and
pipe heat loss
2. Select the heating
cable
DETERMINE NUMBER OF CIRCUITS
To determine the number of circuits, you need to know:
3. Determine the
heating cable length
• Total heating cable length
4. Determine the
electrical parameters
• Supply voltage
• Minimum start-up temperature
5. Select the
connection kits
and accessories
Use Table 7 to determine the maximum circuit length allowed. If the total heating
cable length exceeds the maximum circuit length for the expected start-up
temperature, more than one circuit will be required.
6. Select the control
system
7. Complete the Bill
of Materials
Number of circuits = Heating cable length required
Maximum heating cable circuit length
Important: Select the smallest appropriate ground-fault circuit breaker size.
WARNING: To minimize the danger of fire from sustained electrical arcing if
the heating cable is damaged or improperly installed, and to comply with the
requirements of Thermal Management, agency certifications, and national
electrical codes, ground-fault equipment protection must be used on each heating
cable branch circuit. Arcing may not be stopped by conventional circuit protection.
Table 7 MAXIMUM CIRCUIT LENGTH IN FEET
40°F Maintain
Start-up
temperature
(°F)
–20°F
0°F
20°F
40°F
5XL1
CB size
(A)
120 V
8XL1
120 V
5XL2
208 V
240 V
8XL2
277 V
208 V
240 V
12XL2
277 V
208 V
240 V
277 V
15
101
76
174
178
183
131
138
146
111
114
117
20
134
101
232
237
245
175
184
194
148
151
156
30
201
151
349
356
367
262
276
291
223
227
234
40
270
201
465
474
478
349
368
388
297
303
312
15
115
86
199
203
209
149
157
166
120
122
126
20
153
115
265
271
279
199
209
221
160
163
168
30
230
172
398
406
419
298
314
331
239
244
252
40
270
210
470
490
530
370
390
420
319
326
336
15
134
100
232
237
244
173
182
192
126
129
133
20
178
133
309
315
325
231
243
257
169
172
177
30
270
200
464
473
488
346
365
385
253
258
266
40
270
210
470
490
530
370
390
420
340
344
355
15
160
119
278
283
292
206
217
229
142
145
150
20
214
159
370
378
390
275
290
306
190
194
200
30
270
210
470
490
530
370
390
420
285
291
300
40
270
210
470
490
530
370
390
420
340
360
380
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
21 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Table 8 MAXIMUM CIRCUIT LENGTH IN METERS
Start-up
temperature
(°C)
–29°C
–18°C
–7°C
4°C
4°C Maintain
5XL1
CB size
(A)
120 V
8XL1
5XL2
8XL2
12XL2
120 V
208 V
240 V
277 V
208 V
240 V
277 V
208 V
240 V
277 V
15
31
23
53
54
56
40
42
44
34
35
36
20
41
31
71
72
75
53
56
59
45
46
48
30
61
46
106
108
112
80
84
89
68
69
71
40
82
61
142
145
149
106
112
118
90
92
95
15
35
26
61
62
64
45
48
51
36
37
38
20
47
35
81
83
85
61
64
67
49
50
51
30
70
52
121
124
128
91
96
101
73
74
77
40
82
64
143
149
162
113
119
128
97
99
102
15
41
31
71
72
74
53
56
59
39
39
41
20
54
41
94
96
99
70
74
78
51
52
54
30
82
61
141
144
149
106
111
117
77
79
81
40
82
64
143
149
162
113
119
128
104
105
108
15
49
36
85
86
89
63
66
70
43
44
46
20
65
48
113
115
119
84
88
93
58
59
61
30
82
64
143
149
162
113
119
128
87
89
91
40
82
64
143
149
162
113
119
128
104
110
116
Example: Fire Standpipe
Total heating cable length
69 ft (21 m) of 12XL2-CR (from Step 3)
Supply voltage
208 V (from Step 1)
Minimum start-up temperature –20°F (–29°C) (from Step 1)
Number of circuits
69 ft / (111 ft max 15 A CB at –20°F) = 0.6 circuits
Round up to 1 circuit
Example: Branch Line with Sprinkler
Total heating cable length
266 ft (81 m) of 5XL2-CT (from Step 3)
Supply voltage
208 V (from Step 1)
Minimum start-up temperature 0°F (–18°C) (from Step 1)
Number of circuits
266 ft / (398 ft max 30 A CB at 0°F) = 0.67 circuits
Round up to 1 circuit
DETERMINE TRANSFORMER LOAD
Transformers must be sized to handle the load of the heating cable. Use the
following tables to calculate the total transformer load.
22 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Table 9 TRANSFORMER SIZING (AMPERES/FOOT)
5XL1
8XL1
120
120
208
240
277
208
240
277
208
240
277
–20
0.119
0.159
0.069
0.067
0.065
0.092
0.087
0.082
0.108
0.106
0.102
0
0.105
0.139
0.060
0.059
0.057
0.080
0.076
0.072
0.100
0.098
0.095
20
0.090
0.120
0.052
0.051
0.049
0.069
0.066
0.062
0.095
0.093
0.090
40
0.075
0.101
0.043
0.042
0.041
0.058
0.055
0.052
0.084
0.083
0.080
Minimum start-up
temperature (°F)
5XL2
8XL2
12XL2
Table 10 TRANSFORMER SIZING (AMPERES/METER)
5XL1
8XL1
120
120
208
240
277
208
240
277
208
240
277
–20
0.391
0.521
0.226
0.221
0.215
0.301
0.286
0.270
0.354
0.347
0.336
–18
0.343
0.457
0.198
0.194
0.188
0.264
0.251
0.238
0.329
0.322
0.312
–7
0.294
0.394
0.170
0.166
0.161
0.227
0.216
0.205
0.311
0.305
0.296
4
0.246
0.331
0.142
0.139
0.135
0.191
0.181
0.172
0.276
0.271
0.263
Minimum start-up
temperature (°C)
5XL2
8XL2
12XL2
Use Table 9 or Table 10 to determine the applied voltage and the maximum A/ft (A/m)
at the minimum start-up temperature to calculate the transformer load as follows:
Max A/ft at minimum start-up temperature x Heating cable length (ft)
x Supply voltage
1000
= Transformer
load (kW)
Example: Fire Standpipe
Total heating cable length
69 ft (21 m) of 12XL2-CR (from Step 3)
Supply voltage
208 V
Minimum start-up temperature
–20°F (–29°C) (from Step 1)
Max A/ft at –20°F x Total feet
x Supply voltage
1000
Transformer load (kW)
= (0.108 A/ft x 69 ft x 208 V) / 1000
= 1.68 kW
Example: Branch Line with Sprinkler
Total heating cable length
266 ft (81 m) of 5XL2-CT (from Step 3)
Supply voltage
208 V
Minimum start-up temperature
0°F (–18°C) (from Step 1)
Max A/ft at 0°F x Total feet
x Supply voltage
1000
Transformer load (kW)
THERMAL MANAGEMENT
= (0.060 A/ft x 266 ft x 208 V) / 1000
= 3.3 kW
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
23 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Pipe Freeze Protection
and Flow Maintenance
1. Determine design
conditions and
pipe heat loss
2. Select the heating
cable
3. Determine the
heating cable length
4. Determine the
electrical parameters
5. Select the
connection kits
and accessories
6. Select the control
system
7. Complete the Bill
of Materials
Step 5 Select the connection kits and accessories
All XL-Trace systems require a power connection and end seal kit. Splice and tee kits
are used as required. Use Table 11 on page 25 (for aboveground applications) and
Table 13 on page 27 (for buried applications) to select the appropriate connection
kits.
Note: Add extra cable on your Bill of Materials for power connections, tees, and
end seals. See Table 11 on page 25, Table 13 on page 27, and Table 14 on page
28 for more information.
WARNING: Approvals and performance are based on the use of Thermal
Management-specified parts only. Do not substitute parts or use vinyl electrical
tape.
ABOVEGROUND PIPING
End seal
Tee
Cross
Sprinkler
Insulation
Line sensing
RTD
Splice
Power
connection
RayClic-LE
lighted end seal
(optional)
Junction
box
Ambient
sensing
RTD
Raychem
C910-485
Fig. 12 RayClic connection system
Use the following table for general piping, standpipe and sprinkler. Develop a Bill of
Materials from the connection kits listed in the following table.
24 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Table 11 CONNECTION KITS AND ACCESSORIES FOR ABOVEGROUND PIPING Catalog
number
Description
Standard
packaging
Usage
Heating cable
allowance1
Connection kits
RayClic-PC
Power connection and end seal (RayClicSB-04 pipe mounting bracket included)
1
1 per circuit
2 ft (0.6 m)
RayClic-PS
Powered splice and end seal (RayClicSB-04 pipe mounting bracket included)
1
1 per circuit
4 ft (1.2 m)
RayClic-PT
Powered tee and end seal (RayClic-SB-04
pipe mounting bracket included)
1
1 per circuit
6 ft (1.8 m)
FTC-P2
Power connection and end seal kit
1
1 per circuit
3 ft (0.9 m)
Note: FTC-P is required for circuits
requiring 40 A circuit breakers.
Splice used to join two
sections of heating cable
1
As required
2 ft (0.6 m)
RayClic-T
Tee kit with end seal;
use as needed for pipe
branches
1
As required
3 ft (0.9 m)
RayClic-X
Cross connection to connect four heating
cables
1
As required
8 ft (2.4 m)
FTC-HST3
Low-profile splice/tee; use as
needed for pipe branches
2
As required
3 ft (0.9 m)
RayClic-LE
Lighted end seal (RayClic-SB-04 pipe
mounting bracket included)
1
Alternate end seal
2 ft (0.6 m)
R
RayClic-S
RayClic-E
THERMAL MANAGEMENT
Replacement end seal
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
1
Additional end seal 0.3 ft (0.1 m)
25 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Table 11 CONNECTION KITS AND ACCESSORIES FOR ABOVEGROUND PIPING Catalog
number
Standard
packaging
Description
Heating cable
allowance1
Usage
Accessories
1
As required
–
RayClic-SB-02 Wall mounting bracket
1
As required
–
ETL
“Electric Traced” label (use 1 label
per 10 feet of pipe)
1
1 label per 10 feet
(3 m) of pipe
–
GT-66
Glass cloth adhesive tape for
attaching heating cable to pipe at
40°F (4°C) or above.
66 ft (20 m)
See Table 12
–
GS-54
Glass cloth adhesive tape for
attaching heating cable to pipe
above –40°F (–40°C).
54 ft (20 m)
See Table 12
–
AT-180
Aluminum tape. Required for
attaching heating cable to plastic
pipe (use 1 foot of tape per foot of
heating cable)
180 ft (55 m) 1 ft/ft (0.3 m/m) of
heating cable
0 AIR nag
TH
H5 ER em
76 MA ent
57
L.C LL
C
07 OM
/13
El
ec
tr
ic
H
ea
W
AR
tT N
ra IN
ci G
ng
SH
m O
C
ele ain K
re ct tain A
m ri e ND
ovi ca d
ng l lo a FIR
th ck cco E
erm o rd H
u
al t ing AZA
in pro to R
D
su ce
la d m :
tio ure a Sys
n. s nu te
be fact m
fo ure m
re r' u
st
w s
ork in b
e
in stru in
g ct st
on io a
n ll
©
th s. ed
20
is F a
13
Pe
nta
lin oll nd
PN WW
ir
Th
C7
e ow
72 W. erm
03 PE al
or
-00 NT Ma
RayClic-SB-04 Pipe mounting bracket. Required
for mounting the kits off the pipe
for exposure temperatures greater
than 150°F (65°C) and for grease
and fuel line splices and tees.
–
1 Allow extra heating cable for ease of component installation.
2 Junction box not included.
3 One RayClic-E end seal is required for each FTC-HST used as a tee kit.
Table 12 QUANTITY OF GLASS CLOTH ADHESIVE TAPE REQUIRED (ATTACH AT 1-FOOT INTERVALS)
Pipe size (in)
<2
3
4
6
8
10
Feet of pipe per GT-66 roll
60 (18 m)
50 (15 m)
40 (12 m)
25 (8 m)
20 (6 m)
15 (5 m)
Feet of pipe per GS-54 roll
49 (15 m)
41 (13 m)
33 (10 m)
20 (6 m)
16 (5 m)
12 (4 m)
26 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
BURIED PIPING
Raychem C910-485
Electronic controller
Alternate
end seal
Wall
Conduit
RayClic-LE*
FTC-XC
power
connection
with wall
mounting
bracket
Conduit for
temperature
sensor
Ground
Temperature sensor
Junction box
Insulation RayClic-E
end seal
RayClic-PC* Ground
Conduit
with wall
mounting
bracket
XL-Trace
heating cable
with -CT jacket
Alternate
power connection
*To protect the heating cable, run cable
inside Convolex tubing between the
conduit and the RayClic connection kits.
Wall
Fig. 13 Typical buried supply piping system
Use the following for buried water supply piping. Note that all connections must be
aboveground and that no splices/tees are allowed. Develop a Bill of Materials from
the connection kits in this table.
Table 13 CONNECTION KITS AND ACCESSORIES FOR BURIED PIPING Catalog
number
Description
Standard
packaging
Usage
Heating cable
allowance1
RayClic-PC
Power connection and end seal kit
(RayClic-SB-04 pipe mounting bracket
included)
1
1 per circuit
2 ft (0.6 m)
FTC-XC2
The FTC-XC power connection and end
1
seal kit is for use with XL-Trace heating
cable that is run through conduit to a junction box. Materials for one power connection and end seal is included in the kit.
1 per circuit
2 ft (0.6 m)
2 ft (0.6 m)
Note: FTC-XC is required for circuits
requiring 40 A circuit breakers.
RayClic-LE
Lighted end seal (RayClic-SB-04 pipe
mounting bracket included)
1
Alternate end seal
RayClic-E
Replacement end seal
1
Additional end seal 0.3 ft (0.1 m)
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
27 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Table 13 CONNECTION KITS AND ACCESSORIES FOR BURIED PIPING Catalog
number
Standard
packaging
Usage
RayClic-SB-04 Pipe mounting bracket
1
As required
–
RayClic-SB-02 Wall mounting bracket
1
As required
–
ETL
“Electric Traced” label (use 1
label per 10 feet of pipe)
1
1 label per 10 feet
(3 m) of pipe
–
GT-66
Glass cloth adhesive tape for
attaching heating cable to pipe at
40°F (4°C) or above
66 ft (20 m)
See Table 14
–
GS-54
Glass cloth adhesive tape for
attaching heating cable to pipe
above –40°F (–40°C)
54 ft (20 m)
See Table 14
–
AT-180
Aluminum tape. Required for
attaching heating cable to plastic
pipe (use 1 foot of tape per foot of
heating cable)
180 ft (55 m)
1 ft/ft (0.3 m/m) of
heating cable
–
Description
Heating cable
allowance1
0 AIR nag
TH
H5 ER em
76 MA ent
57
L.C LL
C
07 OM
/13
El
ec
tr
ic
H
ea
W
AR
tT N
ra IN
ci G
ng
SH
m O
C
ele ain K
re ct tain A
m ri e ND
ovi ca d
ng l lo a FIR
th ck cco E
erm o rd H
u
al t ing AZA
in pro to R
D
su ce
la d m :
tio ure a Sys
n. s nu te
be fact m
fo ure m
re r' u
st
w s
ork in b
e
in stru in
g ct st
on io a
n ll
©
th s. ed
20
is F a
13
Pe
nta
lin oll nd
PN WW
ir
Th
C7
e ow
72 W. erm
03 PE al
or
-00 NT Ma
Accessories
1 Allow extra heating cable for ease of component installation.
2 Junction box not included.
Table 14 QUANTITY OF GLASS CLOTH ADHESIVE TAPE REQUIRED (ATTACH AT 1-FOOT INTERVALS)
Pipe size (in)
<2
3
4
6
8
10
Feet of pipe per GT-66 roll
60 (18 m)
50 (15 m)
40 (12 m)
25 (8 m)
20 (6 m)
15 (5 m)
Feet of pipe per GS-54 roll
49 (15 m)
41 (13 m)
33 (10 m)
20 (6 m)
16 (5 m)
12 (4 m)
28 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Pipe
Pipe Freeze
Freeze Protection
Protection
and
and Flow
Flow Maintenance
Maintenance
Step 6 Select the control system
1. Determine design
conditions and
pipe heat loss
2. Select the heating
cable
3. Determine the
heating cable length
4. Determine the
electrical parameters
Temperature control with heating cable circuit supervision is required by approval
agencies, codes and Thermal Management. To satisfy this requirement Thermal
Management offers a wide variety of monitoring and control options for fire
suppression system.
Raychem C910-485 and ACS-30 are the only controllers approved for this application:
• Temperature controls save energy by ensuring that the system is energized only
when necessary.
5. Select the
connection kits
and accessories
• Superior accuracy and reliability with RTD temperature sensors.
6. Select the control
system
• Self-test features to ensure the heating cable circuit integrity even when the system is not in demand.
7. Complete the Bill
of Materials
• Modbus® protocol communication over RS-485 system is supported using
Raychem ProtoNode multi-protocol gateways.
• Integrated 30 mA ground-fault protection for cost savings and circuit protection.
• Dry contact alarm relay outputs for loss of power, low temperature, RTD failure,
relay failure and ground-fault trip.
Note: NFPA 13 requires that heat tracing for fire suppression systems are
supervised by controllers with alarm relays connected to the fire control panel.
Use the following table to identify the control system suitable for your application.
Contact your Thermal Management representative or call (800) 545-6258 for more
information and other control options.
Table 15 TEMPERATURE CONTROL OPTIONS Application
Raychem C910-485
Raychem ACS-30
Ambient sensing
x
x
Line sensing
x
x
Buried pipe
x
x
Proportional ambient control
x
x
Fire sprinklers
x
x
RTD
RTD
Sensor length
See data sheet
See data sheet
Setpoint range
30°F to 200°F (–1°C to 92°C)
"
Enclosure
NEMA 4X
"
Differential
3°F (1.6°C)
"
Setpoint repeatability
3°F (1.6°C)
"
Sensor
Enclosure limits
–40°F to 140°F (–40°C to 60°C)
"
Switch rating
30 A
30 A
Switch type
DPST
DPST
Electrical rating
100–277 V
100–277 V
Approvals
c-CSA-us
c-CSA-us
Ground-fault protection
20 mA to 100 mA
20 mA to 100 mA
BMS interface
Standard
Modbus1
Alarm outputs
x
x
AC relay dry contact relay
x
x
1 ProtoNode multi-protocol gateways are available from Thermal Management.
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
29 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Table 16 CONTROL SYSTEMS Catalog number
Description
Electronic Controllers and Sensors
C910-485
The Raychem C910-485 is a compact, full-featured microprocessor-based singlepoint heat-trace controller. The C910-485 provides control and monitoring of electrical
heat-tracing circuits for both freeze protection and temperature maintenance, and can
be set to monitor and alarm for high and low temperature, and ground-fault level. The
C910-485 controller is available with an electromechanical relay (EMR). Communications modules are available for remote control and configuration.
The Raychem C910-485 includes RS-485 communications module for interfacing with
Building Management Systems (BMS) and fire control panels.
A0
A1
A2
A3
A4
A5
A6
A7
ACS-UIT2
ACS-PCM2-5
The Raychem ACS-30 Advanced Commercial Control System is a multipoint electronic
control and monitoring system for heat-tracing used in commercial freeze protection
and flow maintenance applications. The Raychem ACS-30 system can control up to 260
circuits with multiple networked ACS-PCM2-5 panels, with a single ACS-UIT2 user
interface terminal. The ACS-PCM2-5 panel can directly control up to 5 individual heattracing circuits using electromechanical relays rated at 30 A up to 277 V.
ProtoNode-RER
The Raychem ProtoNode is an external, high performance multi-protocol gateway for
customers needing protocol translation between Building Management Systems (BMS)
and the Raychem ACS-30 or C910-485 controllers.
PROTOCESSOR
SERIAL ETHERNET
PROTONODE
B0
B1
B2
B3
S0
S1
S2
S3
By FieldServer Technologies
www.ProtoCessor.com
The ProtoNode-RER is for BACnet® or Metasys® N2 systems.
RS 485 GND
RS 485 RS 485+
+PWR
- PWR
FRAME GND
RTD-200
RTD3CS
RTD10CS
RTD50CS
Stainless steel jacketed three-wire RTD (Resistance Temperature Detector) used with
Raychem C910-485 and ACS-30 controllers.
RTD-200: 3-in (76 mm) temperature sensor with a
6-ft (1.8 m) lead wire and 1/2-in NPT bushing
RTD3CS: temperature sensor with a 3-ft (0.9 m) flexible armor,
18-in (457 mm) lead wire and 1/2-in NPT bushing
RTD10CS: temperature sensor with a 10-ft (3 m) flexible armor,
18-in (457 mm) lead wire and 1/2-inch NPT bushing
RTD50CS: temperature sensor with a 50-ft (3 m) flexible armor,
18-in (457 mm) lead wire and 1/2-in NPT bushing
Pipe Freeze Protection
and Flow Maintenance
1. Determine design
conditions and
pipe heat loss
Step 7 Complete the Bill of Materials
If you used the Design Worksheet to document all your design parameters, you
should have all the details necessary complete your Bill of Materials.
2. Select the heating
cable
3. Determine the
heating cable length
4. Determine the
electrical parameters
5. Select the
connection kits
and accessories
6. Select the control
system
7. Complete the Bill
of Materials
30 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
INSTALLATION AND MAINTENANCE
Follow the installation and maintenance procedures in the XL-Trace System
Installation and Operation Manual (H58033) when installing XL-Trace on fire
suppression systems with the following additional instructions.
When installing XL-Trace on sprinklers follow the methods shown below:
Sprinkler head without sprig
Insulation
(Use outer diameter of thermal insulation
when determining the spray shadowing in
your sprinkler system.)
Additional heating cable length = Pipe diameter x 4
Sprinkler head with sprig
Sprig
length
Additional heating cable length = Sprig length x 3
Fig. 14 XL-Trace on sprinklers
Note: The orientation and type of sprinkler head shown above is only for
reference. The illustrations only depict the amount of heat tracing required and how
to install it.
When installing XL-Trace on dry pendant sprinklers used in freezer applications
follow the methods shown below:
Sprinkler pipe
Freezer
Freezer wall
insulation
Thermal pipe insulation
XL-Trace heating cable
Length = 2 x dry sprinkler length
Fig. 15 XL-Trace on extended pendant sprinklers
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
31 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
XL-TRACE SYSTEM FIRE SPRINKLER SYSTEM FREEZE PROTECTION DESIGN WORKSHEET
TraceCalc Pro for Buildings is an online design tool available to help you create
simple or complex heat-tracing designs for pipe freeze protection or flow
maintenance applications. It is available at http://www.pentairthermal.com.
Step  Determine design conditions and pipe heat loss
Design conditions
Fire sprinkler
system
❑ Supply piping
❑ Standpipe
Location
Min.
Maintain ambient
temp.
temp.
(Tm)
(Ta )
Pipe diameter
and material
Pipe
length
Thermal insulation
type and thickness
❑ Indoors ❑ Aboveground ❑ Outdoors ❑ Buried
______
______
____ in
❑ Metal
❑ Fiberglass
❑ Plastic _____ ft (m) ❑ ________
____ in
❑ Sprinkler piping ❑ Indoors ❑ Aboveground ❑ Outdoors ❑ Buried
______
______
____ in
❑ Metal
❑ Fiberglass
❑ Plastic _____ ft (m) ❑ ________
____ in
____ in
❑ Branchpipe
❑ Indoors ❑ Aboveground ❑ Outdoors
______
______
____ in
❑ Fiberglass
❑ Metal
❑ Plastic _____ ft (m) ❑ ________
❑ Branchpipe with ❑ Indoors ❑ Aboveground sprinkler
❑ Outdoors
______
______
____ in
❑ Metal
❑ Fiberglass
❑ Plastic _____ ft (m) ❑ ________
____ in
50°F
1 in
0 Metal
1/2 in
Example:
0 Branch line
with sprinkler
0 Indoor
40°F
200 ft
0 Foam
elastomer
Pipe heat loss
Calculate temperature differential ΔT
Pipe maintain temperature (TM)
Ambient temperature (TA)
°F (°C)
°F (°C)
=
−
TA
TM
∆T
Example: Pipe Freeze Protection − Branch line with sprinkler
Pipe maintain temperature (TM)
40 °F
Ambient temperature (TA)
0 °F
40 °F
TM
32 / 40
−
(from Step 1)
°F
(from Step 1)
°F
0 °F
TA
=
40 °F
∆T
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Determine the pipe heat loss: See Table 1 for the base heat loss of the pipe (Qb). If the ΔT for your system is not listed, interpolate between the two closest values.
QB-T1 ∆T1
QB-T2 ∆T2
QB
W/ft (W/m)
W/ft (W/m)
W/ft (W/m)
Pipe diameter
in
Insulation thickness
in
∆T
°F (°C)
QB-T1
W/ft (W/m)
QB-T2
W/ft (W/m)
Example: Pipe Freeze Protection − Branch line with sprinkler
1 in
Pipe diameter
1/2 in
Insulation thickness
40°F
∆T
QB-T1
1.4 W/ft
QB-T2
3.5 W/ft
∆T interpolation
∆T 40°F is 67% of the distance between ∆T 20°F and ∆T 50°F
QB-40
QB-50 + [0.67 x (QB-50 − QB-20)] = 1.4 + [0.67 x (3.5 − 1.4)] = 2.8 W/ft
Pipe heat loss (QB)
2.8 W/ft @ TM 40°F (9.2 W/m @ TM4°C)
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
33 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Compensate for insulation type and pipe location
See Table 1 for the pipe heat loss (Qb). If the ΔT for your system is not listed, interpolate between the two closest values.
See Table 3 for insulation multiple
See Table 2 for indoor multiple
Location
Insulation thickness and type
QB
W/ft (W/m)
Insulation multiple
Indoor multiple (if applicable)
QB
x
Insulation multiple
x
Indoor multiple
(if applicable)
=
QCORRECTED
Example: Pipe Freeze Protection − Branch line with sprinklers
Location
Indoors
Insulation thickness and type
1-1/2 in foamed elastomer
QB
2.8 W/ft @ TM 40°F (9.2 W/m @ TM 4°C)
Insulation multiple
1.00
Indoor multiple
0.79
QCORRECTED
2.8 W/ft x 1.0 x 0.79 = 2.2 W/ft @ TM40°F (7.3/m @ TM4°C)
34 / 40
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
THERMAL MANAGEMENT
Step  Select the heating cable
Power output data: See Fig. 11
Power output correction factors: See Table 4
Pipe maintain temperature (TM)
(from Step 1)
Corrected heat loss (QCORRECTED)
(from Step 1)
Supply voltage
(from Step 1)
Pipe material (metal or plastic)
(from Step 1)
XL-Trace sprinkler application
(from Step 1)
Indoor/outdoor
Aboveground/buried
Location
(from Step 1)
Heating cable selected
(from Step 1)
Power at TM (120/208 V)
Power output correction factor
(from Step 1)
Plastic pipe correction factor
Power at rated V factor
x
=
Plastic pipe correction factor
Corrected power
Is the heating cable power output (PCORRECTED) ≥ the corrected heat loss? E Yes E No
If No, then design with additional runs of heating cable or thicker thermal insulation.
Example: Pipe Freeze Protection − Branch line with sprinklers
40°F
Maintain temperature (TM)
2.2 W/ft @ TM 40°F
Corrected heat loss (QCORRECTED)
Supply voltage
208 V
Pipe material (metal or plastic)
metal
(*AT-180 aluminum tape required for
installing heating cable on plastic pipes)
QB = 2.2 W/ft @ TM 40°F
Select curve C: 5XL2 = 5.6 W/ft @ 40°F
Power output correction factor: 208 V = 1.00
Pipe material correction factor: Metal = 1.00
Corrected heating cable power: 5.6 @/ft x 1.00 x 1.00 = 5.6 W/ft
Select: 5XL2
Select outer jacket
❑-CR
❑ -CT (Required for buried applications)
Example: Pipe Freeze Protection − Branch line with sprinklers
Location
Aboveground, indoors
Selection:
5XL2-CR
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
35 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Step  Determine the heating cable length
For additional heating cable allowance for valves: See Table 5
For additional heating cable allowance for pipe supports, flanges and sprinklers: See Table 6.
Additional heating cable for heat sinks
Type of valves
How many
Type of pipe supports
How many
Type of flanges
How many
Type of sprinklers
How many
x
x
x
x
=
Additional heating cable
Total heating cable
for valves
=
Additional heating cable
Total heating cable
for pipe supports
=
Additional heating cable
Total heating cable
for flanges
=
Additional heating cable
Total heating cable
for sprinklers
Total heating cable for heat sinks:
Total heating cable length
(
Pipe length
x
)
=
Additional cable for valves,
pipe supports, flanges, and sprinklers
+
Number of heating
cable runs
Total heating cable
length required
Example:
Additional heating cable for heat sinks
Gate valves
2
Type of valves
How many
Noninsulated hangers
10
Type of pipe supports
How many
1 foot springs
20
Type of sprinklers
How many
x
x
2 ft
=
Additional heating cable
(0.1 ft* x 2) x 10 = 2 ft
=
Additional heating cable
3
1.7 ft
Total
(*1-in pipe = 1-in/12-in = 0.1 ft)
x
4 ft
Total
=
Additional heating cable
60 ft
Total
Total:
66 ft
Total heating cable length
(
36 / 40
200 ft
Pipe length
x
1
)
Number of heating
cable runs
+
66 ft
266 ft
=
Additional cable for valves,
pipe supports, flanges, and sprinklers
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
Total heating cable
length required
THERMAL MANAGEMENT
Step  Determine the electrical parameters
Determine maximum circuit length and number of circuits
See Table 7 and Table 8.
Total heating cable length required
Supply voltage:
T 120 V
T 240 V
T 208 V
T 277 V
Circuit breaker size:
T 15 A
T 30 A
T 20 A
T 40 A
Minimum start-up temperature
Maximum circuit length
Total heating cable length required
/
Maximum heating cable circuit length
=
Number of circuits
Example:
Total heating cable length required 266 ft of 5XL2-CT
Supply voltage:
T 120 V
T 240 V
T9208 V
T 277 V
Circuit breaker size:
T 15 A
930 A
T
T 20 A
T 40 A
0°F
Minimum start-up temperature
0.67 ft
Number of circuits
266 ft
Total heating cable length required
/
398 ft
Maximum heating cable circuit length
=
0.67 circuits, round up to 1
Number of circuits
Determine transformer load
See Table 9 and Table 10.
Max A/ft* at minimum start-up temperature
x
Heating cable length
x
Supply voltage
/ 1000
=
/ 1000
=
Transformer
load (kW)
Example:
0.06 A/ft
Max A/ft* at minimum start-up temperature
THERMAL MANAGEMENT
x
266 ft
Heating cable length
x
208 V
Supply voltage
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
3.3 kW
Transformer
load (kW)
37 / 40
Fire Sprinkler System Freeze Protection ­— XL-Trace System
Step  Select the connection kits and accessories See Table 11.
Connection kits – Aboveground
Description
Quantity
Heating cable
allowance
❑ RayClic-PC
Power connection and end seal
____________
__________________
❑ RayClic-PS
Power splice and end seal
____________
__________________
❑ RayClic-PT
Powered tee and end seal
____________
__________________
❑ FTC-P
Power connection and end seal
____________
__________________
❑ RayClic-S
Splice
____________
__________________
❑ RayClic-T
Tee kit with end seal
____________
__________________
❑ RayClic-X
Cross connection
____________
__________________
❑ FTC-HST
Low-profile splice/tee
____________
__________________
❑ RayClic-LE
Lighted end seal
____________
__________________
❑ RayClic-E
Extra end seal
____________
__________________
Connection kits – Buried
Description
Quantity
Heating cable
allowance
❑ RayClic-PC
Power connection and end seal
____________
__________________
❑ FTC-XC
Power splice and end seal
____________
__________________
❑ RayClic-LE
Lighted end seal
____________
__________________
❑ RayClic-E
Extra end seal
____________
__________________
Accessories – Aboveground and
buried
Description
Quantity
❑ RayClic-SB-04
Pipe mounting bracket
_____________
❑ RayClic-SB-02
Wall mounting bracket
_____________
❑ ETL
“Electric-Traced” label
_____________
❑ GT-66
Glass cloth adhesive tape
_____________
❑ GS-54
Glass cloth adhesive tape
Aluminum tape (for plastic pipes)
_____________
❑ AT-180
_____________
Total heating cable
allowance for connection kits
Total heating cable length
38 / 40
+
Total heating cable allowance for connection kits
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
=
Total heating cable
length required
THERMAL MANAGEMENT
Step  Select the control system See Table 16.
Thermostats, controllers
and accessories
Description
Quantity
Microprocessor-based single-point heat-tracing controller
with RS-485 communication
_____________
❑ ACS-UIT2
ACS-30 user interface terminal
_____________
❑ ACS-PCM2-5
ACS-30 power control panel
_____________
❑ ProtoNode-RER
Multi-protocol gateway
_____________
❑ RTD3CS
Resistance temperature device
_____________
❑ RTD10CS
Resistance temperature device
_____________
❑ RTD-200
Resistance temperature device
_____________
❑ RTD50CS
Resistance temperature device
_____________
❑ C910-485
Step 7 Complete the Bill of Materials
Use the information recorded in this worksheet to complete the Bill of Materials.
THERMAL MANAGEMENT
Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
39 / 40
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Raychem-DG-H58489-XLTraceFireSprinklerCOM-EN-1707
40 / 40
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