Important Safety Points; Installation - Hyco Powerflow Instruction Manual

Thank you for purchasing a Powerflow series unvented electric water heater. The Powerflow is
suitable for hand washing and dishwashing where a number of hot water outlets are required
such as kitchens, schools, restaurants, washrooms and offices. The Powerflow is the ideal solution
for light industrial, commercial and light domestic hot water requirements. Please read and
understand these instructions before commencing installation, and leave them with the user
when installation is complete.

1. Important safety points

Installation must be undertaken by a competent installer trained in the installation of unvented water
heating systems in accordance with building regulations G3.
Building regulations G3 requires a temperature and pressure relief valve to be factory fitted. This must
not be removed or blocked in any way.
Installation must comply with the latest edition of the IEE wiring regulations.
These units are very heavy. They must be securely fastened to a suitably strong wall using the fixings
supplied. Remember to allow for the weight of the water (one KG per litre of capacity) when assessing
the suitability of the wall.

2. Installation

Overview
Components Checklist
Expansion Vessel 3/4" MBSP, precharge pressure 3.5 bar
Pressure Reducing Valve, factory set at 3 bar
Single Check Valve 15mm x 15mm compression
Pressure (expansion) Relief Valve 1/2" BSP male inlet, 1/2" BSP female discharge, factory set at 6 bar
Tundish 15mm x 22mm
• This unit must be installed vertically, with the pipes pointing downwards and the temperature and
pressure relief valve at the top.
• Ensure the wall is strong enough to support the heater, including the weight of the water when full.
• This heater is not suitable for outdoor installation.
• Do not install where there is any risk of freezing.
• The heater is bulky and heavy, Do not attempt to lift alone.
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