Hyco SF1/3 User manual

Exp nsion
vessel kit
SF1/3
Instruction M nu l
Version 1.0 Nov 2007
Hyco Manufacturing Ltd
California Place
California Drive, Whitwood
Castleford
West Yorkshire
WF10 5QH
Tel: [phone] Fax: [phone]
Web: www.hyco.co.uk
E-mail: [e-mail]
FYK0433 Expansion MAN:EYK0780 HANDYFLOW MAN 24/1/08 16:08 Page 1

Exp nsion vessel kit
A. CONTENTS
This kit contains:
1 expansion vessel (0.5L for F1, 2.0L for F3)
1 check (one-way) valve
B. COMPATIBILITY
To be used in conjunction with Hyco 10L and 15L unvented (mains pressure) water
heaters.
C. WHEN THIS KIT IS REQUIRED
This kit is required if either of the following conditions applies:
1. Presence of device preventing reverse flow
If a one-way device is fitted that prevents hot water expansion, the pressure relief valve
would operate routinely on the heating cycle. This is not permissible under Water
Regulations. Note that pressure reducing valves, water meters and similar devices are
usually one-way and would block expansion.
2. Cold water off-take too close to the heater
It is a requirement that expanded heated water does not mix with drinking water
supplies. If there is a cold water off-take very close to the heater there is a risk that
the hot and cold water supplies would mix.The minimum distance required between
the heater and the nearest cold water off-take is 2.8m for the 10L and 4.2m for the
15L model.
D. INSTALLATION
Inst ll s shown below:
IMPORTANT:ALWAYS FIT PRESSURE RELIEF VALVE SUPPLIED
WITH THE HEATER (NOT THIS KIT)
Hot Cold
To Drain
Pressure
Relief Valve
Expansion
Vessel
Check Valve
Nearest Cold
Water Drain Off
ervice Valve
Cold Water upply
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