Installation - gledhill Torrent GreenHeat OV TGH140 Design, Installation & Servicing Instructions

INSTALLATION

Torrent GreenHeat OV Model Selection Guide
Max hot water demand Bedrooms
1 bathroom 1 - 2
1 bathroom + en-suite shower 2 - 4
2 bathrooms + en-suite shower 3 - 4
2 bathrooms + 2 en-suite showers 3 - 5
3 bathrooms + 2 en-suite showers 3 - 5
Torrent GreenHeat SP Model Selection Guide
Max hot water demand Bedrooms
1 bathroom 1 - 2
1 bathroom + en-suite shower 2 - 4
2 bathrooms + en-suite shower 3 - 4
2 bathrooms + 2 en-suite showers 3 - 5
3 bathrooms + 2 en-suite showers 3 - 5
Torrent GreenHeat SOL Model Selection Guide
Max solar
Max hot water demand collector Bedrooms
area (m )
2
1 bathroom + en-suite shower 2.40 2 - 4
2 bathrooms + en-suite shower 2.84 2 - 4
2 bathrooms + 2 en-suite showers 4.00 3 - 5
3 bathrooms + 2 en-suite showers 5.12 4 - 6
Torrent GreenHeat HP Model Selection Guide
Max hot water demand Bedrooms
1 bathroom + en-suite shower 2 - 3
1 bathroom + 2 en-suite showers 2 - 3
2 bathrooms + en-suite shower 3 - 4
2 bathrooms + 2 en-suite showers 3 - 4
3 bathrooms + 2 en-suite showers 4 - 5
Torrent GreenHeat HP-SOL Model Selection Guide
Max solar
Max hot water demand collector Bedrooms
area (m )
2
1 bathroom + en-suite shower 2.40 2 - 3
1 bathroom + 2 en-suite showers 2.84 2 - 3
2 bathrooms + 1 en-suite shower 4.00 3 - 4
2 bathrooms + 2 en-suite showers 5.12 3 - 4
INSTALLATION
Model Selection
Model
The suggested model sizes shown in the tables
opposite are based on a typical daily hot water
TGH140-OV
usage and on the assumptions that the heating
TGH170-OV
system is correctly sized and that the thermal
TGH210-OV
store is fully charged to at least 75°C by the main
heat source.
TGH250-OV
TGH350-OV
When selecting a solar model, it is important
to check the dedicated solar volume (shown in
table on pages 6-7) complies with the Building
Regulations ADL1 Domestic Building Services
Compliance Guide.
Model
The suggested model sizes are based on
TGH140-SP
typical hot water usage. For high speci cation
TGH170-SP
dwellings an increase of one model size should
be considered.
TGH210-SP
TGH250-SP
General Design Considerations
TGH350-SP
As a general rule, the cupboard footprint needs
to be a minimum of 150mm wider, 80mm deeper
and 80mm taller than the unit selected.
The base chosen for the Torrent should be level and
capable of supporting the weight of the unit when
Model
full of water as shown in General Data.
TGH210-SOL
General Restrictions
TGH250-SOL
a. An ascending spray type bidet or any other
TGH350-SOL
appliance with a Class 1 back-syphonage
TGH450-SOL
risk requiring a type A air gap should not be
used.
b. Torrent should not be used where steam is
the primary heating medium.
Model
TGH170-HP
TGH210-HP
TGH250-HP
TGH350-HP
TGH450-HP
Model
TGH210-HPSOL
TGH250-HPSOL
TGH350-HPSOL
TGH450-HPSOL
Page 14
Mains Water Supply
A typical arrangement of the hot and cold water system is shown below. All Torrent
models are designed to be fed directly from the mains and they ful l the requirements
of Water Bylaw 91, and therefore do not require a check valve to be tted to the cold
water supply pipe.
The performance of the Torrent is directly related to the cold water supply pressure and
volume to the dwelling. This must be capable of providing for all those services which
could be required simultaneously and the maximum demand should be calculated
for sizing the distribution network.
As a general guideline, although a 15mm external service may be su cient for the
smaller dwelling with one bathroom, a 22mm service is preferred (25mm MDPE) and
should be the minimum for larger dwellings.
The Torrent will operate at dynamic pressure as low as 1.5 bar (at the appliance) which
must be available when the local demand is at its maximum, but the preferred range
is between 2 and 3.0 bar.
If the incoming static mains pressure exceeds 5.0 bar at any point in the 24 hour cycle,
then a pressure limiting valve set at 3.0 bar should be tted downstream of the stop
tap where the cold supply enters the dwelling.
If a water meter is tted in the service pipe, it should have nominal rating to match
the anticipated maximum simultaneous hot and coldwater demand, calculated in
accordance with BS 6700. This could be up to 50 l/min in some properties.
The sanitary water equipment used in the system should be suitable for a working
pressure of 10 bar and the units must be fitted strictly in accordance with the
requirements of the Local Water Undertaking and the relevant Water Bylaws.
Second dwelling
Sink
Check valve NOT REQUIRED unless scale inhibitor is a chemical type.
Supply
In any event, do not fit a check valve down stream of this point (see 5.1.9)
pipe
Check valve NOT REQUIRED unless
supply pipe services more than one dwelling
Pressure limiting valve
(Not required unless mains pressure is greater than 5 bar)
Hot and Cold Distribution Pipe Arrangement - All Models
INSTALLATION
Taps and Shower Fittings
Aerated taps are recommended to prevent
splashing.
All types of shower mixing valves can be used
as long as both hot and cold supplies are mains
fed. However all mains pressure systems are
subject to dynamic changes particularly when
other hot and cold taps/showers are opened
and closed, which will cause changes in the
water temperature at the mixed water outlet
such as showers. For this reason and because
thermostatic showers are now no more
expensive than manual showers, we strongly
recommend thermostatic showers with Torrent.
The shower head provided must also be suitable
for mains pressure supplies.
The hot water supply to a shower-mixing
valve should be fed where practical directly
from the Torrent or be the rst draw-o point
on the hot circuit. The cold water supply to a
shower-mixing valve should where practical
be fed directly from the rising mains via an
independent branch.
The shower must incorporate or be tted with
the necessary check valves to prevent back-
syphonage protection in accordance with Water
Regulations.
The supply of hot and cold mains water directly
to the bidet is permitted provided that it is of
the over-rim ushing type and that type 'A' air
gap is incorporated.
BS1212
Scale inhibitor
Ballvalve
(where necessary)
W.C.
H.B.
Bath
TYPICAL HOT AND COLD DISTRIBUTION
INSTALLATION
Page 15