Hyco Speedflow SF05K Instruction Manual page 2

HYCO SPEEDFLOW UNVENTED WATER HEATER
MODELS SF05K (5 Litres) SF10K (10 Litres) AND
SF15K (15 Litres)
1. INTRODUCTION
Thank you for purchasing a Hyco Speedfl ow unvented water heater. This product
operates at mains water pressure and can supply hot water using ordinary taps.
CAUTION
THE SPEEDFLOW MUST BE INSTALLED AND MAINTAINED BY
A COMPETENT PERSON IN ACCORDANCE WITH CURRENT
ELECTRICAL AND PLUMBING REGULATIONS.
IT IS ESSENTIAL THAT THE ENCLOSED PRESSURE RELIEF VALVE
IS FITTED
MAKE PLUMBING CONNECTIONS WITH FLEXIBLE STAINLESS
STEEL HOSES TO FACILITATE FUTURE MAINTENANCE
ALWAYS FIT THE HEATER THE CORRECT WAY UP
(PIPES SHOULD BE AT THE TOP)
USE LOWEST ACCEPTABLE TEMPERATURE SETTING TO SAVE
ENERGY AND REDUCE LIMESCALE
DO NOT CONNECT TO POWER UNLESS UNIT IS FULL OF
WATER – OPEN TAP AND ALLOW WATER TO FLOW FREELY
TO CLEAR AIRLOCKS
DO NOT SWITCH POWER ON IF WATER IN HEATER OR PIPES
COULD BE FROZEN
2. INSTALLATION (WALL MOUNTING)
The Speedfl ow is normally fi tted immediately below the outlet to be supplied, but
it can be mounted above or to the side of the outlet provided it is vertical with
the pipe outlets at the top. The unit can either be placed directly on the fl oor or
fi xed to a wall using the mounting bracket supplied.
ENSURE THE MOUNTING SURFACE IS STRONG ENOUGH TO
SUPPORT THE SPEEDFLOW INCLUDING THE WEIGHT OF
THE WATER.
The 5 litre model (SF05K) can typically serve 1 sink, the 10 litre model (SF10K)
can typically serve 1 or 2 sinks and the 15 litre model (SF15K) can typically serve
2 or 3 depending on simultaneous usage.
1
8. TROUBLE SHOOTING
SYMPTOM POSSIBLE CAUSE
Water constantly fl ows Water pressure is too
from pressure relief valve high (above 4 bar).
Water fl ows from Heated water cannot
pressure relief valve expand back up inlet pipe
during heating cycle only due to obstruction.
Water is not heated 1. Thermal cut-out has
tripped.
2. Element has failed.
3. Thermostat has failed.
Small volume of hot 1. Unit upside down.
water
2. Thermostat set too
low.
3. Thermostat fault.
Water appears to leak 1. Poor connections to
from heater pipework.
2. Element gasket leak.
If problems persist contact Hyco Technical Dept on 01977 517555.
SOLUTION
Fit Pressure Reducing
Valve Kit (Hyco Kit SF4).
Fit Expansion Vessel Kit
(Hyco kit SF3).
1. See section 6. Check
heater is correct way
up (pipes at top).
2. Replace element. See
section 6 for access to
element.
3. Replace thermostat.
1. Re-install correct way
up.
2. Increase thermostat
setting.
3. Replace thermostat.
1. Check plumbing
connections, especially
those to inlet and
outlet.
2. Refi t gasket, tighten
fl ange bolts evenly. Do
not over tighten. See
section 6 for access to
element.
6