gledhill Torrent T210 DE, Torrent T144 DE Design & Installation Instructions

Torrent

a mains pressure hot water supply incorporating

a thermal store

Design & Installation

Instructions

All models comply with the WMA

specication for thermal stores.

Please leave these instructions

adjacent to the appliance

Page 2

Issue 3 : 05-08

Section Page

Description 3

System Design 4

Installation 7

Commissioning 10

Servicing 12

Fault Finding 15

Parts 16

Terms & Conditions 17

These instructions should be read in conjunction with the installation/servicing
instructions issued by the manufacturer of the heat source being used.
Any installation must be in accordance with the relevant requirements of the Gas
Safety Regulations, Local Building Regulations, I.E.E. Wiring Regulations and Byelaws
of the Local Water Undertaking. It should be read in accordance with the relevant
recommendations of the following:
BS 6798; BS 5549; BS 5546;
BS 5440:1; BS 5440:2; CP 331:3
BS 6700: BS 5258 and BS 7593: 1992

It must be installed by a competent person as stated in the Gas Safety Regulations.
Manufacturers notes must NOT be taken as over-riding statutory obligations.

Torrent is not covered by Section G3 of the 1985 Building Regulations but the
installation is notifiable to Building Control unless it is carried out under an approved
competant person scheme.

Although the secondary supply (domestic) is at mains pressure, it is not necessary to
fit an expansion chamber, pressure or temperature relief valve.

This information is provided to assist generally in the selection of equipment.

Responsibility for selection and specification of our equipment must however
remain that of our customer and any experts or consultants concerned with the
installation(s).

PLEASE NOTE: THAT WE DO NOT THEREFORE ACCEPT ANY RESPONSIBILITY FOR
MATTERS OF DESIGN SELECTION OR SPECIFICATION, FOR THE EFFECTIVENESS OF AN
INSTALLATION OR UNIT CONTAINING ONE OF OUR PRODUCTS.

All goods are sold subject to our Conditions of Sale which are set out at the rear
of this specification. In the interest of continuously improving the Torrent range,
Gledhill Water Storage Limited reserve the right to modify the product without
notice, and in these circumstances this booklet, which is accurate at the time of
printing, should be disregarded. An updated set of Instructions will be produced
and supplied with new appliances and available on request.

A WRAS LISTED PRODUCT DEVELOPED BY GLEDHILL WATER STORAGE IN THE 1980’s
IN CONJUNCTION WITH BRITISH GAS PLC.

BRITISH PATENT NOS. 1358166, 2136099
BRITISH PATENT APPLICATIONS PUBLISHED UNDER NOS. 2136099, 2153503, 2153504,
8516025

COMMISSION-

ING

Page 3

DESCRIPTION

INTRODUCTION

Torrent is a range of primary thermal stores
designed to provide mains pressu re hot
water without the requirements of a pressure
and temperature relief valve. Notification to
Building Control to comply with Section G3 of
the Building Regulations is not required. This
is because the thermal store is vented in the
normal way. Unlike unvented storage cylinders
the Torrent range of mains pressure hot water
supply units require no maintenance. This
reduces running cost for the home-owner
while offering high performance showers and
higher flow rates to fill a bath in approximately
4 minutes.

Torrent is available in two basic variants :-

1. Torrent Direct - For providing hot
water heated by electricity. (Figure 1)

2.

Torrent Indirect - For use with gas or

oil boilers. (Figure 2)

Because this product does not require a safety
discharge from a temperature and pressure
relief valve, any installations will be easy to
incorporate into the building and will not
suffer from the problems associated with using
PVCu soil stacks to take the discharge from
unvented cylinders.

TORRENT DIRECT (Figure 1)

Torrent Direct is an electrically heated, fully
packaged mains pressure hot water appliance.
It is a combination unit which incorporates a
feed and expansion tank, and eliminates the
problems associated with a cold water cistern
in the roof space.

It is supplied complete with two low watts
density immersion heaters for extra quiet
operation as recommended by the Electricity
Council and BEAB approved for safety.

“Draw-off” for baths and “flow ” for power
showers are fed from this one compact unit
which means there are more siting options,
maximising building design flexibility.

Torrent direct models are listed in Table 1.

TORRENT INDIRECT (Figure 2)

Torrent indirect is a mains pressure vented hot
water cylinder designed for use with gas or oil
boiler and is suitable for both open vented and
sealed heating systems.

Torrent indirect models are listed in Table 2.

F & E tank supplied separately with
indirect models

Direct models have the F & E tank
included within the case

Page 4

SYSTEM DESIGN

INSTALLATION

Ensure that the water level in the feed and
expansion cistern is set correctly when
filling manually or by adjusting the ballvalve
before switching on the electricity supply to
the unit.

It is an important part of the commissioning
procedure to ensure that the thermostat
settings are accurate by allowing the tank
sufficient time to hea t up and switch off
without reaching boiling point. Thermostats
are pre-set to 77°C. The upper immersion
heater need only be used for day time topping
up if necessary.

NOTE: NEVER COMMISSION ELECTRICAL
INSTALLATIONS TO THE APPLIANCE UNTIL
THE WATER IN THE F & E TANK IS UP TO THE
WATER LEVEL MARK. FAILURE TO DO SO
WILL DRY FIRE THE IMMERSION HEATERS.

If it is necessary to replace the immersion heater
these should be obtained complete with pre-set
thermostat from your Local Gledhill Depot.

Figure 1 Torrent Direct

TORRENT - DIRECT

This is a thermal store directly heated by
electric imme rsion heater. The feed and
expansion cistern is included in the finished
case with the feed and vent pipe factory
supplied and connected.

Adjustable thermostatic
mixing valve

To hot taps/showers
(22mm)

Cold mains feed
(22mm)

Immersion heater
(Off Peak)

Immersion heater
(Boost)

TABLE 1 TORRENT DIRECT MODELS (Figure 1)

Model Capacity

Store (litres)

Hot Flow

Rate (litres)

Dimensions mm

Includes F & E Tank

Min Cupboard Size Suggested Dwelling Type

Height x Diameter Width x Depth x Height

T144 DE 160 15 1650 x 550 700 x 600 x 1900 1 - 2 bedrooms

1 bathroom

T210 DE 230 15 1870 x 595 750 x 600 x 2120 2-3 bedrooms

1 bathroom / 1 shower

All models Off peak immersion heater : 3kW; 230V;50Hz (Type 2)

On peak immersion heater : 3kW;230V;50Hz (Type 2)
Mains pressure working : 1.5 - 3.5 bar
(All proprietary equipment must be suitable for a maximum working pressure of 10 bar)

Page 5

SYSTEM DESIGN

Figure 2 Torrent Indirect

The primary pipework connecting the boiler and
the thermal store should be sized to achieve a
maximum of 11oC rise across the boiler or the
maximum temperature rise specified by the
boiler manufacturer. But in any instance it should
not be less than 22mm copper tube.

TORRENT - INDIRECT

In an open-vented heating (Figure 5) the primary
store and the heating circuit are filled from
the same feed and expansion tank, supplied
separately. Therefore the water treatment can
be introduced through the feed and expansion
tank. When calculating the quantity of water
treatment, the volume of thermal store should
be taken into account.

In a sealed heating system (Figure 6) the primary
store water does not mix with sealed heating
circuit. Therefore water treatment must be
introduced via header tank for the primary store
and via radiator for the heating circuit.

BOILER SIZING

It is only necessary to calculate the heating
requirements in accordance with BS 5449. The
allowance for domestic hot water (shown in the
table below) depends upon the operating mode
selected for the 3 port-valve. For example; if
the system is designed to operate with priority
to domestic hot water , i.e. full divert, then no
additional allowance for hot water is required
for sizing the boiler.

retaWtoHcitsemoDrofecnawollA

ledoM

)Wk(retaWtoHcitsemoDrofecnawollA

edoMtreviDlluF edoMerahSwolF

031T 0 2

071T 0 3

002T 0 5.3

Adjustable thermostatic
mixing valve

To hot taps/showers
(22mm)

Cold mains feed
(22mm)

Immersion heater
(optional)

Primary Coil

300

F & E Cistern
supplied separately

TABLE 2 TORRENT INDIRECT (Figure 2)

Model Nominal

Store

capacity

Hot Water
Flow Rate

Dimensions of thermal

store over insulation (not

including F & E tank)

Min Cupboard

Size

Suggested Dwelling Type

Litres l/min height x dia width x depth x

height

T130 130 18 1250 x 550 700 x 600 x 1800 2/3 bedroom house with one bathroom and

separate en-suite shower room

T170 170 18 1450 x 550 700 x 600 x 2000 2/4 bedroom house with one bathroom and

one or two separate en-suite shower rooms

T200 190 25 1600 x 550 700 x 600 x 2150 3/4 bedroom house with one bathroom and

up to 3 separate en-suite shower rooms or 2

bathrooms and 2 separate en-suite shower

rooms

All models * Maximum working pressure Primary thermal store = 6m Primary heating coil = 3.0 bar
* Standard components Control thermostat, DHW mixing valve

Page 6

SYSTEM DESIGN

COLD AND HOT WATER DISTRIBUTION DESIGN - ALL MODELS

Torrent models are designed to be fed directly from mains. They fulfill the
requirements of Water Byelaw 91, and therefore do not require a check valve to be
fitted to the supply pipe. The performance of the Torrent is directly related to the
adequacy of the cold supply to the dwelling. This must be capable of providing for
those services which could be required simultaneously and the maximum demand
should be calculated. Torrent will operate at dynamic pressures as low as 1.5 bar (at
the appliance) which must be available when local demand is at its maximum, but
the preferred range is between 2 and 3.5 bar.

As a general guideline, although a 15mm external service may be sufficient for the
smaller dwelling with one bathroom, a 22mm service is preferred (25mm MDPE)
and should be the minimum for larger dwellings.

If a water meter is fitted in the service pipe, it should have a nominal rating to match
the anticipated maximum simultaneous hot and cold water demand, calculated in
accordance with BS 6700. This could be 50 litres per minute in some properties.

If the incoming static mains water pressure exceeds 3.5 bar at any point in the 24
hour cycle then a pressure limiting valve set at 3.5 bar should be fitted downstream
of the stop tap where the cold supply enters the property. Units must be fitted
strictly in accordance with the requirements of the Local Water Undertaking who
should be consulted prior to installation. In the event of any difficulty please contact
us as the manufacturer. Equipment used in the system should be suitable for a
working pressure of 10 bar.
A typical arrangement for the hot and cold water system is shown in Figure 3.

BALLVALVE/OVERFLOW - ALL MODELS

Because it supplies the whole of the primary/heating system a ballvalve and overflow
must be installed in the feed and expansion cistern when the Torrent Indirect is used
in an open vented heating system. A ballvalve and overflow can also be fitted with
Torrent Direct models or Torrent Indirect models fitted in sealed primary heating
systems.

However because it only supplies the thermal store the feed and expansion cistern
on these two appliances/systems can be filled manually if required ie through a hose
pipe fitted with a double check valve. In this situation an overflow can still be fitted
if required to ensure that if a leak occurs on the internal coils it can be discharged
safely to the outside of the building and not discharge internally from the feed and

TYPICAL HOT AND COLD DISTRIBUTION

Check valve NOT REQUIRED unless
supply pipe services more than one dwelling

Check valve NOT REQUIRED unless
scale inhibitor is a chemical type.

Pressure limiting valve

(Not required unless mains pressure is greater than 3.5 bar)

Supply
pipe

Second dwelling

Sink

Scale inhibitor
(where necessary)

Bath

H.B.

W.C.

BS1212
Ballvalve

Figure 3 Hot and Cold Distribution Pipe Arrangement - All Models

Note: The cold feed to the

Torrent should approach
from below to avoid heat

creepage during idle

periods.

expansion cistern itself. If a ballvalve is fitted
a warning/overflow pipe must always be
fitted.

USE IN HARD WATER AREAS

- ALL MODELS

The patented design of the heat exchange
module is such that the turbulence through
the coil slows down the formation of scale in
even the hardest water conditions, at normal
operating pressures. However, where the water
can be considered hard, it is recommended that
an effective proprietary in-line scale inhibitor is
installed. It is important that where the supply
to the Torrent is in 22mm the in-line descaler is
also 22mm. In practice servicing is not normally
required but in hard water areas requirements
can be considered similar to those needed for
instantaneous or ‘combi’ appliances.
The installation of the scale inhibitor should
be in accordance with the manufacturers
instructions and with the Water Byelaws.

PLASTIC PIPEWORK - ALL MODELS

Th is ap pliance i s suita bl e fo r use wi th
plastic pipework as long as the mat erial
is recommended for the purpo se by the
manufacturer and is installed fully in accordance
with their recommendations. We recommend
the use of barrier pipe for heating systems,
which will mean the system can have British
Gas service cover in regions offering this service.
A short 300mm length of copper pipe must be
fitted at the hot outlet from the thermostatic
mixing valve.

WATER TREATMENT

In all Torrent models treating the primary
water will not contaminate domestic hot
water supply.