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IMPORTANT : PLEASE READ AND UNDERSTAND THESE INSTRUCTIONS BEFORE INSTALLING
THE MEGATECH WATER HEATER. INCORRECT INSTALLATION MAY INVALIDATE GUARANTEE.
THIS APPLIANCE IS NOT INTENDED FOR USE BY PERSONS (INCLUDING CHILDREN) WITH
REDUCED PHYSICAL, SENSORY OR MENTAL CAPABILITIES, OR LACK OF KNOWLEDGE AND
EXPERIENCE, UNLESS THEY HAVE BEEN GIVEN SUPERVISION OR INSTRUCTION CONCERNING
THE USE OF THE APPLIANCE BY A PERSON RESPONSIBLE FOR THEIR SAFETY.
THE MEGATECH SOLAR MUST BE INSTALLED (SECTIONS 2 - 6), COMMISSIONED (SECTION 7)
AND MAINTAINED (SECTIONS 9 - 10) BY A COMPETENT INSTALLER IN ACCORDANCE WITH
BUILDING REGULATION G3 (ENGLAND AND WALES), TECHNICAL STANDARD P3 (SCOTLAND)
OR BUILDING REGULATION P5 (NORTHERN IRELAND) AND THE WATER FITTING REGULATIONS
(ENGLAND AND WALES) OR WATER BYELAWS (SCOTLAND). FOLLOWING INSTALLATION AND
COMMISSIONING, THE OPERATION OF THE HEATER SHOULD BE EXPLAINED TO THE USER
(SECTION 8) AND THESE INSTRUCTIONS LEFT WITH THEM FOR FUTURE REFERENCE.
2.1 COMPONENT CHECK LIST
Before commencing installation check that all the components for your Megatech Solar unit are
contained in the package. The following components are supplied as standard with your Megatech
unit :
•Factory fitted immersion heater (s) and thermal controls
•Cold Water Combination Valve (comprises Isolating Valve, Pressure Reducing Valve,
Strainer, and Check Valve).
•Expansion Core Unit (comprises Check Valve and Expansion Valve)
•Expansion Vessel (including wall mounting bracket)
•Factory fitted Temperature/Pressure Relief Valve (set at 90oC/10bar)
•T&P Relief Valve Insulation Set
•Drain Valve
•Wiring Centre (CL units only)
•Tundish (included in the Cold Water Combination Valve pack)
•Factory fitted Auxiliary heating coil Thermostat and Thermal Cut-out (CL units only)
•2-port Motorised Valve (CL units only)
•Lifting handle
2.2 SITING THE MEGATECH SOLAR (see Diagram 1)
The Megatech Solar unit must be vertically floor mounted. It can be placed anywhere convenient
provided the discharge pipe(s) from its safety valves can be correctly installed. Areas that are
subject to freezing must be avoided. Ensure that the floor is of sufficient strength to support the “full”
weight of the unit (refer to Tables 4 and 5 on page 33 for unit weights). Pipe runs should be kept as
short as possible for maximum economy. Access to associated controls, immersion heaters and
controls housings should be possible for servicing and maintenance of the system (Note: controls
housings hinge open to the left hand side).
Please do not install valves or pipework (except discharge pipe) within 50mm (2”) of the T&P relief
valve to allow your insulation set to be fitted. The insulation set is important to ensure heat and
energy conservation. See section 3.9 for more information.
To aid installation the Megatech Solar is provided with lifting points located in the base moulding and
a lifting handle. The lifting handle should be fully threaded onto the outlet boss before use. Once the
Megatech Solar is suitably positioned the lifting handle should be removed to allow connection of the
outlet pipework. The weights of the units are noted on the tables on page 33.
2General Requirements
General Requirements