4
STEP 1
Read this instruction book carefully before proceeding. A Tornado and Tempest Stainless™
cylinder is a mains pressure product and is unvented. Unvented hot water systems should
only be fitted and serviced by competent persons, as defined by the current
edition of the Building Regulations (England and Wales) Approved Document G or
equivalent regulations.
Tornado Stainless has an integrated expansion vessel. Tempest Stainless has a separate
expansion vessel to reduce the height of the unit. Please verify which model you have
before proceeding with the installation.
The unit must be stored in an upright and dry place before installation.
Only use the components supplied with the Tornado and Tempest Stainless.™ Failure to do so
is potentially dangerous and will invalidate the product guarantee.
The Tornado and Tempest Stainless™ should be fitted to the mains water supply through
the Inlet Control Group supplied. It must only be used with a pumped primary supply and
with mains quality water.
The standard Tornado and Tempest Stainless™ cannot be used with solid fuel boilers.
Please contact our Technical Helpline for further assistance on these applications.
Tornado and Tempest Stainless™ mains pressure systems require an annual safety check
by a competent person. Failure to carry out this safety check may invalidate the
warranty.
Use only approved DZR brass compression fittings for cylinder connections.
STEP 2
Measure the area in which you plan to install the Tornado and Tempest Stainless™ and ensure that the floor
can support the weight of the cylinder when full.
Heat-up and re-heat times are for indirect models. All dimensions and weights are nominal.
Tornado and Tempest Stainless™ is designed to work efficiently under any water flow and pressure conditions.
However, the full potential of a mains pressure system is unlikely to be achieved if the flow falls below 20
1/min and the dynamic pressure is less than 1.5 bar. Telford Water Heaters can supply a range of products for
improving pressures and flows if required. A minimum of 300mm clear space should be left above the Tornado
Stainless for maintenance.
Capacity
(litres)
90
125
150
170
200
250
300
Weight
When Full (Kgs)
125
165
195
220
250
310
360
Tornado
Stainless
Overall Height
(mm)
N/A
1350
1540
1780
1600
1920
2140
Tempest
Stainless
Overall Height
(mm)
750
950
1075
1225
1175
1375
1520
External
Diameter
(mm)
520
520
520
520
570
570
570
Heat Up Time
0 - 60°C
(mins)
26
36
37
36
33
35
40
Re-Heat Time to
60°C after 70%
Draw Off (mins)
18
25
26
25
24
25
29
NEW TORNADO/TEMPEST 25336 19/4/05 12:25 PM Page 7
