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Installation
COLD WATER SUPPLY
Telford Stainless unvented cylinders are capable
of delivering up to 55 litres of hot water per
minute given an adequate supply. The minimum
recommended supply is 20 litres per minute at
1.5 bar.
WHAT BOILER SHOULD I USE
To ensure peak performance and efficiency
the cylinder should ideally be connected to an
oil-fired or gas condensing boiler. The primary
circuit must be pumped and can be open vented
or sealed. Energy requirement (BTU/KWH) will
vary according to cylinder volume.
LOCATION
Our stainless cylinders can be sited virtually
anywhere in the home, but consideration must
be given to service clearances and the weight of
the cylinder when filled.
CONNECTION DIAMETERS
DOMESTIC SIDE
Cold water inlet and hot water
draw-off 3/4” female.
PRIMARY SIDE
Coil flow and return - 3/4” female
SAFETY VALVES
Temperature and pressure relief - Inlet
group 15mm x 15mm pressure
relief - 15mm
TUNDISH
15mm x 22mm compression
SECONDARY RETURN
Standard on cylinders 200L and above.
Performance
Indirect Re-Heat Performance
90 125 150 170 200 250 300
TIME TO RE-HEAT AFTER 70% DRAW-OFF 18 25 26 25 24 25 29
TIME TO RE-HEAT FROM COLD TO 65°C 26 36 37 36 33 35 40
Dimensions are for use as guideline only.
Direct Re-Heat Performance
Stainless Steel Unvented
90 125 150 170 200 250 300
TIME TO RE-HEAT AFTER 70% DRAW-OFF 27 37 45 51 63 75 136
TIME TO RE-HEAT FROM COLD TO 65°C 52 72 86 98 108 144 202
Dimensions are for use as guideline only.
Heat-up and re-heat times assume a cold water temperature of 15°C
If using a twin coil variant, where the second coil is linked to a solar energy recovery application, the
recovery times listed will improve significantly. Depending on the energy input, the recovery times
could be halved.
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