ELEKTRA FreezeTec Series User manual

1
E
Heating Cables
with integrated thermostat
ELEKTRA FreezeTec™ is intended for protection of pipes and valves
susceptible to damage caused by low temperatures. The system may be used
only when the following conditions are met:
A
Application
FreezeTec™
ELEKTRA
external diameter of pipe to be insulated should not exceed DN 50 mm;
pipe insulation thickness should be between min. 10 mm and max. 20 mm;
temperature of the protected pipe should not exceed +65°C;
min. ambient temperature - 25°C.
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ELEKTRA FreezeTec™ consists of a heating cable with a built-in thermostat, and
operates automatically, eliminating the need for a separate control system usually
used with conventional heating cables. The assembly of the system is quick,
simple and does not need to be controlled.
Technical specifications:
thermostat turn-on temperature: +3 °C;
turn-off temperature: + 10°C;
power output: 12 W/m;
power supply: 230V, 50/60 Hz.
C
Characteristics
and advantages
22
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ATTENTION: Values shown in the table may vary by up to 5%.
ELEKTRA FreezeTec™ cables are available as ready-made sets with integrated
thermostat and three-conductor supply cold tail 1.5 m long.
Table 1
T
Types of Cables
FreezeTec™ 12/2
FreezeTec™ 12/3
FreezeTec™ 12/5
FreezeTec™ 12/7
FreezeTec™ 12/10
FreezeTec™ 12/15
FreezeTec™ 12/21
FreezeTec™ 12/30
FreezeTec™ 12/42
2
3
5
7
10
15
21
30
42
24
36
60
84
120
180
252
360
504
2200
1500
900
700
448
286
204
158
104
TYPE LENGTH OF HEATING
CABLE HEATING POWER HEATING CONDUCTOR
RESISTANCE
mWW-
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Before the cable set is in place, the length of pipe to be heated should be
measured in order to select the length of heating cable (Table 1) using a co-
efficient (Table 2) which will depend on the following:
- pipe diameter
- insulation thickness
- minimum ambient temperature
IInstallation
(Preparation)
Table 2
8
15
20
25
32
40
50
INTERNAL DIAMETER
OF PIPE DN
[mm]
INCHES
INSULATION THICKNESS
AMBIENT TEMPERATURE
COEFFICIENT
10mm 20mm
1
1
1
1
1
1,1
1,2
1
1
1
1
1
1,1
1,3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1,1
1,3
1,5
1,8
2,1
1
1
1
1
1,1
1,2
1,3
o
-10 C o -15 C o -25 C o -10 C o -15 Co -25 C
1/4
1/2
3/4
1
1
1 /4
1
1 /2
2
Heating cable length = pipe length x coefficient
(Table 2)
STAGE 1
The installation should be started by placing the thermostat (cable tail) on the
pipe as shown in drawing 1. The thermostat should be located on the end of
the pipe that is most at risk of lower ambient temperature.
4
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STAGE 2
The ELEKTRA FreezeTec™ heating set is laid along the pipe as shown on the
Drawing (Fig. 2a) or helically wound around the pipe (Fig. 2b).
Method used to lay the cable (along or helically around the pipe) depends on the
selected length of heating cable. Cables are attached by means of a tape.
Fig. 2a Fig. 2b
Heating
cable
300mm
Thermostat
Installation
tape
Heating
cable Thermostat
Installation
tape
300mm
Pipeline
Thermal
Insulation
Heating Cable
o
45
300 mm
Installation
tape
Fig. 1
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Installation tape
(available with the heating set)
When the coefficient specified in table 2 has the
value 1, the heating cable should be laid along
the pipe (Fig. 2a). If the coefficient exceeds 1,
the heating cable shall be wound around the
pipe barrel (Fig. 2b).
Example 1
14 m long 20 mm diameter pipe;
- insulation thickness: 10 mm;
- min. ambient temperature : -15°C;
- the pipe is to be fitted with a valve.
The coefficient found in Table 2 for the a.m. parameters is 1, therefore, the
heating cable will be laid along the pipe. Next, ELEKTRA FreezeTec™ 12/15
heating cable 15 m long is selected from Table 1. The cable length exceeds that of
pipe by 1 m. The additional length of 1 m is used for valve heating while the
remaining length of cable is laid along the opposite side of pipe.
The cable may also be wound with small pitch around the pipe so as to use the
whole cable length.
Example 2
12 m long 32 mm DN pipe (outer diameter of the pipe - 42 mm).
- 10 m thick insulation;
- min. ambient temperature: -25°C;
- the pipe has no flanges, valves etc.
The value of coefficient (Table 2) for the a.m. parameters is 1.5. Therefore, the
length of heating cable will be: 1 2 m x 1,5 = 18 m. ELEKTRA FreezeTec™ 12/21
heating cable 21 m long is selected. The cable should be helically wound around
the pipe. The pitch [p] may be calculated using the following formula:
where: D - outer diameter of pipe
d - dimension of heating cable
L - heating cable length
P
L - pipe length
R
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In the a.m. example:
D - outer diameter of pipe is 4.2 cm
d - dimension of heating cable is 5 x 7 mm
L - heating cable length is 2100 cm
P
L - pipe length is 1200 cm
R
Thus, the cable has to be wound around the pipe so that the distance between
cable runs is about 11 cm.
Examples of heating cable fitted along the pipe bend and on the valve.
installation tape
heating cable
The heating cable should surround
the valve from both sides.
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Examples of heating cable fitted on a pipe flange, suspended pipe bearers and ground supports
installation tape
heating cable
Heating cables fitted on valves, flanges or supports cannot come into
contact with each other. To prevent possible displacement, the cable
should be fitted with extra tape lengths.
NOTE:
STAGE 3
After the ELEKTRA FreezeTec™ cable is placed on the pipe, it must be fixed
with self-adhesive aluminium tape along the whole cable length.
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If plastic pipes are to be heated, then the self-adhesive tape should be
used under the cable. The use of aluminium adhesive tape ensures that
the cable adheres to the pipes securely and accurate heat transmission is
facilitated. The tape also prevents the cable from being pushed into the
thermal insulation, which could cause possible overheating.
NOTE:
STAGE 4
The pipes and heating cables must be insulated. To enable correct operation
of the system the insulation should be at least 10 mm thick though should not
exceed a max. of 20 mm thickness. Thermal insulation should also be
provided on the thermostat.
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ELEKTRA provides a 3-year warranty (from the date of purchase) for
the FreezeTec™ heating cable.
Warranty terms:
1) The complaint can only be recognized if:
a) The heating system is fitted according to this installation manual
b) Heating cable proof of purchase is produced
2) Any repairs carried out by a person other than an authorized ELEKTRA
technician shall render the warranty null and void
3) The warranty does not cover damage caused by:
a) Mechanical damage
b) Incorrect power supply
c) Lack of overload protection and residual current protection
d) Electrical system installed contrary to applicable regulations
4) Under the warranty ELEKTRA shall only cover any costs related to repairing
or replacing the defective heating cable.
ATTENTION! Claims must be submitted together with the Warranty
Card and proof of purchase at the point of sale where the product was
purchased or at an ELEKTRA office.
10
W
Warranty
Card

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N
Notes

ESG (EN) 40Grupa V5 10/07 B5 1500 (2) c
SILVER ACE ’93 BRONZE HELMET ’97 SILVER HELMET ’98 GOLD HELMET ’97
GOLD MEDAL
MTP P oznań ’2001
BUSINES S GAZELLES
2006
ul. Marynarska 14
02-674 Warszawa, Poland
tel.: [phone]
fax: [phone]
e-mail: [email protected]
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