Elecro Engineering G2 Installation instructions

G2 Heat Exchanger
Installation & Operating Manual

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Important Notes!
Congratulations on purchasing your new Elecro G2 Heat Exchanger. Elecro
heat exchangers are manufactured in the UK, to exacting standards and
use the highest quality materials, to ensure exceptional performance and
reliability please take a moment to read these instructions. Your new heat
exchanger must be installed and operated as specied.
This heat exchanger must be installed correctly by qualied
personnel only, and in accordance with any national / regional
requirements / regulations.
The appliance is not to be used by children. The appliance is not to be used
by persons with reduced physical, sensory or mental capabilities, or lack
of experience and knowledge, unless they have been given supervision or
instruction.
Fig 1.
Product Overview

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Specication
Transfer values
ΔT = Temperature dierence between Primary and Secondary
To calculate BTU multiply kW x 3412
kW x 3412 = BTU Output
Note: Maximum primary operating temperature is 95ºC
Standard
Power
Output
Primary
Flow (m³/h)
Primary-
Head Loss
(kpa)
Secondary
Flow (m³/h)
Secondary
Head Loss
(kpa)
ΔT 15ºC (kW) ΔT 20ºC (kW) ΔT 30ºC (kW) ΔT 40ºC (kW) ΔT 50ºC (kW) ΔT 60ºC (kW) ΔT 70ºC (kW)
30-kW 1.1 6.1 10 5.0 9 11 16 20 26 30 33
30-kW 1.3 6.8 10 5.0 10 13 18 23 31 34 39
30-kW 1.3 6.8 14 7.0 11 15 20 26 34 41 46
49-kW 1.6 7.7 16 9.2 13 18 25 34 41 50 56
49-kW 1.8 8.3 16 9.2 14 20 28 38 45 55 62
49-kW 2.2 9.6 17 9.8 16 22 33 44 52 64 73
85-kW 2.4 11.3 17 10.6 22 28 40 53 64 75 81
85-kW 2.7 12.9 17 10.6 26 32 46 60 73 82 89
85-kW 3.2 14.7 17 10.6 28 34 49 64 77 90 102
122-kW 3.8 18.3 19 12.6 33 43 68 75 93 108 120
122-kW 4.2 20.0 19 12.6 36 48 70 89 108 126 143
122-kW 4.6 21.1 19 12.6 38 52 73 95 116 137 156
L1 L2 L3
30-kW 540 426 247
49-kW 710 596 417
85-kW 840 726 547
122-kW 1000 886 707
Fig 2.
L3
L1
L2 (without unions)
131
Dimensions (mm)

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Installation
Your G2 Heat Exchanger can be installed either horizontally or
vertically. (Please see gures 3 / 4 ) A wall bracket is supplied for the
Horizontal installation only, see gure 5.
Vertical Installation
Horizontal installation
Fig 4.
Fig 3.
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Fig 5
1. Fix the supplied wall bracket
as shown securing with
two screws (xings not supplied)
2. Hang the Heat Exchanger unit onto the bracket
NOTE: Wall bracket not suitable for Vertical
mounting
Wall bracket
Horizontal wall mounting:
Wall bracket
4

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5
Your G2 Heat Exchanger should be connected to the two independent
water circuits as follows:
1. Connection to Water Filtration Circuit (Secondary)
The heat exchanger should be plumbed inline, after the ltration pump
and lter and before any water treatment equipment. It must be fed
with clean water. Weed / debris should not be allowed to enter the heat
exchanger. Universal 1.5” / 50mm ABS unions for connection to rigid PVC
or ABS pipe are included (stepped internal diameter to accommodate both
sizes). The heat exchanger should be installed as close as possible to the
boiler/heat source to minimise heat loss.
To assist with correct air purging and to ensure that the heat exchanger
remains full of water during operation, it should be installed at the lowest
point in the ltration circuit.
If the heat exchanger is installed in a vertical plain, it is essential that
the pool/pond water (secondary circuit) enters low and exits high.
2. Connection to Heating or Cooling Circuit (Primary)
The heat exchanger should be connected directly to the primary circuit
i.e. boiler/chiller via the provided 1” BSP male brass connectors.
NOTE: The circulation pump of the primary circuit should be
controlled by a thermostat, which should be connected via the
ltration pump to allow heating only when the ltration pump is
running.
Air bleed valves should be installed at the high points of the primary
circuit. To ensure correct temperature detection, it is essential that the
thermostat / thermistor is positioned at the pool / pond water inlet of the
heat exchanger. The thermostat pocket and blanking cap use a common
port, and can thus be swapped as required.

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6
Use two wrenches to fasten ttings.
Wrench No. 1 should remain steady.
Care should be taken not to over
tighten any connections, as this
could result in damage to the heat
exchanger.
Only use the supplied brass
connectors as other uncertied
connectors may leak or cause
damage to the unit.
Fig 6.
Circulation direction:
The primary and secondary circuits should be installed so water ows are
counter current i.e. The water from the primary circuit should ow in the
opposite direction to the water in the secondary circuit.
Fig 7.
Secondary ow from Right to Left
Secondary ow from Left to Right
Temperature sensor
Temperature sensor

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Water quality
To prevent damage to your heat exchanger, the water quality must be kept
within the following limits:
Chlorine Content: Max 3mg/l (ppm)
Chloride Content: Max 150mg/l
PH: 6.8-8.0
Calcium Hardness: 200-1000mg/l (ppm)
Guarantee
Your Elecro G2 heat exchanger is guaranteed for 3 years*from the date of
purchase against faulty workmanship and materials.
*regional variations apply
ELECRO ENGINEERING LTD will replace or repair, at it’s discretion, any faulty
units or components returned to the company for inspection. Proof of
purchase may be required.
ELECRO ENGINEERING LTD will not be liable in cases of incorrect
installation, inappropriate use or neglect.
RoHS compliance statement
Elecro Engineering Limited certify that our Swimming Pool Heat
Exchanger range complies in accordance with RoHS Directive 2011/65/EU
on the restriction of hazardous substances.
CAUTION
If the heat exchanger is not used during winter months it must be drained
to prevent frost damage.
NOTE: For Winterising / maintenance - it is recommended that the heat
exchanger is installed with isolation valves on both water input and output
sides of the primary and secondary circuits. This will allow the water to be
shut o on both sides and aid removal from the system, when required.
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Waste of Electrical / Electronic Equipment
This product complies with EU directive 2012/19/EU
Do Not dispose of this product as unsorted municipal waste.
This symbol on the product or on its packaging indicates
that this product should not be treated as household
waste. Instead it should be handed over to the applicable
collection point for the recycling of electrical and
electronic equipment.
By ensuring this product is disposed of correctly you will
help prevent potential negative consequences for the
environment and human health, which could otherwise
be caused by inappropriate waste handling of this product.
The recycling of materials will help to conserve natural
resources. For more information please contact your local
Civic oce, your household waste disposal service or the
retailer where you purchased the product.
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