Hyco SpeedFlow sf10l Manual

Check all connections are completely water tight. You will need to
use a ½” female to 15mm connectors (not supplied).
This unit has a re-settable thermal cut-out. If the unit is not
heating the water, first check the re-set button.
This unit must be mounted upright with pipe connections at the top.
To reduce operating costs and scale build-up, Hyco recommend the
temperature is set at the lowest acceptable heat level.

1. GENERAL
The Hyco Speedflow is an unvented water heater designed for direct connection to the mains supply, and
can service one or more outlets using ordinary taps. It is also suitable for connection to gravity fed
systems.
It is recommended that the Speedflow is fitted by an experienced installer familiar with unvented units.
2. FITTING TO WALL
The Speedflow is usually located in the vertical position below the outlet to be supplied but can be
mounted above the outlet if necessary. It can be free standing on the floor or fixed to a wall using the
bracket supplied. Either way, it must remain upright, with the pipe connections at the top.
Allow for the weight of the Speedflow when full of water (1kg per litre) when assessing the suitability of
a potential fitting.
3. PLUMBING CONNECTIONS
Installation must comply with current Water Regulations.
The hot and cold fittings are ½” BSP at the top of the unit. These fittings are colour
coded (blue = cold, red = hot) and are not interchangeable.
Picture 1 shows part needed for installation: standard compression fitting, ½” female to
15mm.
Use PTFE tape on the threads and fibre/synthetic washers to ensure a water-tight seal.
The Speedflow is supplied with a 6 bar pressure relief valve. This must ALWAYS be fitted. The relief
valve must discharge to a safe and visible place, in accordance with Water Supply regulations.
Depending on the installation circumstances, other
accessories may be required. If required, these
must be ordered separately and are installed as
shown on the diagrams opposite. Do remember that
the water pressure can increase considerably at night.
Note that water leaking from the pressure relief valve
usually indicates excess water pressure. The remedy
is to order and fit accessory kit SF2.

DIAGRAM A – Pressure below 4.2 bar
No accessories needed
DIAGRAM B – Cold draw off nearby
Accessory SF1 needed to prevent
expanded warm water entering
cold water supply
DIAGRAM C – Pressure above 4.2 bar
Accessory SF2 needed to prevent
pressure relief valve
discharging constantly

4. ELECTRICAL CONNECTION
Installation should comply with the latest IEE regulations,
Connection should be to a fused switched 13A spur. If the cable length is insufficient, it is recommended
that the entire cable is replaced and no joins made to the original.
THE SPEEDFLOW MUST BE EARTHED.
IMPORTANT: DO NOT SWITCH ON THE HEATER UNLESS YOU ARE CERTAIN THAT IT
IS COMPLETELY FULL OF WATER. FAILURE TO DO SO WILL VOID
THE WARRANTY.
5. OPERATION
Switch on the mains supply. The external neon lamp indicates when the element is heating. The
adjustable thermostat has a range of 20-70 degrees centigrade.
A re-settable safety cut-out switches off the electricity supply in the event
of the element over-heating. To access the cut-out, unscrew the grey
plastic cover plate. The cut-out is identified by a small red button and is
located inside the centre of a white disc. To re-set the cut-out, press the
red button.
If the Speedflow is to be used by children or the elderly, a thermostatic mixing valve should be fitted to
limit the maximum water temperature to a safe level.
MAINTENANCE: The anode must be checked annually for signs of corrosion and replaced when
necessary.
IMPORTANT: DO NOT SWITCH HEATER ON IF IT IS SUSPECTED OF BEING FROZEN.
GUARANTEE
The Speedflow is guaranteed for 12 months against faults in manufacture. Hyco reserves the right to
repair or replace faulty products. Incorrect installation and consequences of limescale deposits are
excluded. Hyco Manufacturing Ltd shall not be liable for any consequential losses.
Version 1.1 Oct 2006