13 Thermalec
13 Thermalec
13 Thermalec
POOLHEATERS
THERMALEC
THERMALEC
Thermalec Products founded in 1966, were the first company in the UK to manufacture a range of
electric heaters specifically for the commercial and domestic swimming pool industry. In 1999,
Thermalec joined the Meddings Group of Companies to enhance and diversify the Groups
engineering activities, enabling Thermalec to widen its horizons as part of a larger group.
Having established itself in the UK as the market leader Thermalec poolheaters have now become
the No.1 choice for electric heaters in the Middle East, Thermalecs reputation for design, quality and
reliability has allowed the company to expand into Europe, with agents in Germany, France, mainland
Spain and the Balearics, sales into many emerging markets are now also taking place.
Environmentally, Thermalec heaters are well positioned, having no constantly moving parts, noise
levels are practically non-existent(heat pumps have fans and motors), and having no fumes or
emissions a clean environment around your pool is easy (oil and gas heaters produce emissions).
Inexpensive to buy, easy installation and low running costs with minimal maintenance, no
compulsory annual inspection as an added advantage makes Thermalec Pool heaters the sensible
option for heating your pool.
Mainly used for swimming pools, with models suitable for spas and fish ponds, no other heater has a
lifetime guarantee of thermal efficiency your running costs will not escalate due to the heater
getting older.
Unique design ensures cooler water from filter pump does not strike the
elements direct (giving longer life)
Unique spiral flow allows efficient heat removal from the elements, minimising
the scale and sediment build up.
Air generated from the pump passes harmlessly around the sides of the baffles
and across the top of the heater. (heat pumps heat air and water)
The safety thermostat senses the water temperature leaving the heater.
Temperature rise within the heater due to poor flow is rapidly sensed by both
thermostats, switching the heater off instantly, ensuring safety at all times.
Safety Thermostat
mean no unions or heat sink are required. Flow direction is left to right, can be reversed on site
(simple instructions in installation manual).
Heating Elements: Copper, Incoloy or Titanium elements are individually mounted in a
removable top plate, allowing easy element renewal and inspection of the interior of the vessel.
Controls: Heavy duty contactors controlling the power supply to the elements are switched in
turn by a filter pump interlock relay, control thermostat and safety thermostat, set to operate
before the water temperature reaches 53C.
A 2a fuse protects the control circuit and a minimum of 6-indicator lamps monitor every stage of
operation for simple diagnostic servicing.
Model Variations: Due to the variations in power output of different models, the heaters have the
following additional controls:
12PHR standard model: As above plus additional On/Off switch controlling the main power to
the heating elements.
All other standard models: 24PHR 36PHR 72PHR 120PHR and POWER BOOST MODELS
Circuit breakers are fitted replacing the On/Off switch to protect against short circuit, they also act
as a main switch. In the event of the safety thermostat operating due to excess temperature rise a
trip is triggered within the breaker, totally isolating the heater at its point of supply. The heater will
not work again until these devices are manually reset.
E&0E
I N S TA L L AT I O N D E TA I L S
All models are 390mm wide across casing
Model Type
12PHR
24PHR
36PHR
72PHR
120PHR
12PHR/DL*
360
630
630
630
630
630
Pipe Centre to
Floor (mm)
Wall (mm)
140
210
270
430
645
140
183
175
175
175
150
183
200
260
300
380
580
260
Flow connections are plain uPVC stub flanges (plain bore) and require no unions for removal of heater, nor is a heat sink
required. Flow from left to right but can be reversed on site if required. Simply install in return pipe from filter to pool. The
heaters are designed to IP20 and must be installed in dry conditions under cover and in accordance with IEE Regulations at least
3.5m away from the pool.
24PHR
710 x 450 x 350mm
46kg
36PHR
710 x 450 x 410mm
62kg
72PHR
550 x 450 x 730mm
95kg
20PHR
710 x 450 x 730mm
142kg
TO CONVERT
kW to B.Th.U.s multiply by 3412 | kW to kilocalories multiply by 860 | M2 to sq. ft. multiply by 10.764
cu. ft. to gallons multiply by 6.23 | litres to gallons multiply by 0.22 | M3 to gallons multiply by 220
HEATER SIZING CHART FOR 7 HOUR HEATING PERIOD PER 24 HOURS WITH FLOATING SOLAR COVER
(IF FLOATING SOLAR BLANKET NOT USED INCREASE HEATER SIZE BY 50%)
IMPERIAL
75oF
METRIC
80oF
85oF
MODEL
REF
SQ.FT.
GALLS.
SQ.FT.
GALLS.
SQ.FT.
12PHR/3
12PHR/6
12PHR/7.5
12PHR/9
12PHR/12
63
125
156
188
250
1750
3500
4370
5250
7000
50
100
125
150
200
1400
2800
3500
4200
5600
24PHR/15
24PHR/18
24PHR/21
24PHR/24
313
375
438
500
8750
10500
12250
14000
250
300
350
400
36PHR/30
36PHR/36
625
750
17500
21000
72PHR/48
72PHR/60
72PHR/72
1000
1250
1500
120PHR/84
120PHR/96
120PHR/108
120PHR/120
1750
2000
2250
2500
24oC
27oC
M3
30oC
M2 M3
GALLS.
HEATER
SIZE
M2
M3
M2
42
83
104
125
167
1170
2340
2920
3500
4670
3kW
6kW
7.5kW
9kW
12kW
6
12
15
18
24
8
16
21
25
33
5
10
12
14
19
7
13
16
20
26
4
8
10
12
15
5
11
13
16
21
7000
8400
9800
11200
208
250
292
334
5840
7000
8170
9340
15kW
18kW
21kW
24kW
30
36
42
48
41
49
58
66
24
29
34
38
33
39
46
53
19
23
27
31
27
32
37
42
500
600
14000
16800
417
500
11670
14000
30kW
36kW
60
72
82
99
48
58
66
79
39
46
53
64
28000
35000
42000
800
1000
1200
22400
28000
33600
667
834
1001
18680
23350
28020
48kW
60kW
72kW
96
120
144
132
165
197
77
96
115
105
132
158
62
77
93
85
106
127
49000
56000
63000
70000
1400
1600
1800
2000
39200
44800
50400
56000
1167
1334
1501
1668
32680
37350
42020
46690
84kW
96kW
108kW
120kW
168
192
216
240
230
263
296
329
134
154
173
192
184
210
237
263
108
124
139
155
149
170
191
212
2.
In a twenty-four hour period an unheated swimming pool will experience a temperature drop of less than 8oF (4.4oC).
3.
One kW of heater power for every 1000 gallons of volume will result in a temperature rise of 8oF (4.4oC). This is assuming
no thermal losses.
4.
Theoretical heater power should be multiplied by the following factors to calculate the
actual size of Thermalec heater required.
=
=
=
=
=
1.25
0.75
1.50
1.30
1.50
Conversions
Gallons to Litres: multiply by 4.55
Worked Example
For an indoor pool of volume of 850m3 where the air temperature is less than the pool temperature, calculation is as follows:
THERMALEC
Thermalec Products
Kingsley Close East Way Lee Mill Industrial Estate Ivybridge Devon PL21 9GD England
Telephone +44 (0) 1752 313343 Fax +44 (0) 313353