Section 1: Introduction
Page 4
1.1
INSTALLATION REQUIREMENTS
Thank you for purchasing a Grant unvented hot water storage
cylinder from our Wave range.
These Installation and User instructions must be read carefully
before you begin installing the cylinder.
The cylinder must be installed by a competent person in
compliance with all current legislation, codes of practice and
local by-laws covering the installation of an unvented hot water
cylinder.
Please also make sure that the installation complies with the
information contained in these Installation and User Instructions.
To prevent damage to the coil, cylinder and cylinder connections,
make any soldered joints before connecting pipework to the
cylinder.
1.2
WATER SUPPLY REQUIREMENTS
We recommend that your Grant unvented cylinder is installed with
an uninterrupted water supply.
Where possible, the unit should be fed via a Ø22 mm supply pipe.
It requires a supply pressure of at least 1.5 bar with a flow rate of
at least 20 litres per minute as a minimum for it to function.
Even with this pressure and flow rate, the flow from the outlets
will be disappointing if several outlets are used simultaneously.
Generally speaking, the higher the supply pressure, the better the
system will function.
The cylinder control equipment is factory set to limit the incoming
system operating pressure to 3 bar. The maximum supply
pressure into the pressure reducing valve (PRV) is 12 bar.
1.3 LOCATION
The unit is designed to be floor standing, vertically mounted,
internally in a frost-free environment. When choosing a suitable
location for the cylinder, consideration should be given to the
routing of the discharge pipe to a convenient point and also
the availability of an adequate power supply for connecting the
immersion heater(s).
The cylinder may stand on any flat and level surface without any
special foundation requirements, provided that it is sufficiently
robust to support the full weight of the cylinder (refer to Section
2.1).
The position of the cylinder should be such that easy access is
provided for servicing the controls and replacing the immersion
heater(s) should the need arise.
Generally, pipe runs should be made as short as possible and
lagged to prevent heat loss.
1.4
STORAGE AND HANDLING
If the cylinder is not being installed immediately, it should remain
in its carton to prevent damage. We recommend that the cylinder
be transported to its installation position on a sack truck or similar
whilst still within the carton.
! CAUTION !
Do not use the Temperature and Pressure relief valve (T&P
relief valve) as a handle when moving and positioning the
cylinder.
1.5
ABOUT YOUR CYLINDER
Gant MonoWave indirect HP cylinders have a single coil designed
for connection to an air source heat pump, such as the Grant
Aerona³ range. If a source such as Solar Thermal or another
make of heat pump is to be connected, please refer to the
manufacturer’s installation instructions for more information.
The coil must be connected using a 2-port motorised valve (for
solar installations a high temperature 2-port or solenoid valve
must be used) to shut off the flow from the primary source and
electronically interlocked with the heat source via the cylinder
control and high limit thermostat. This valve is supplied loose with
all Grant MonoWave indirect HP cylinders.
Failure to fit this 2-port valve will invalidate all guarantees and will
be in breach of the Building Regulations Approved Document G3
(2010). More information on electrical wiring is given in Section 5
of these instructions.
MonoWave indirect HP cylinders are factory-fitted with a
temperature and pressure relief (T&P) valve and a 3kW electric
immersion heater (two immersion heaters are supplied with the
300 and 400 models).
Refer to Figures 2-6 to 2-10 and their corresponding tables for the
T&P valve position.
Refer to Sections 5, 6 and 12 for further details on immersion
heaters.
1.6
OPEN VENTED HOT WATER SYSTEMS
If required, your MonoWave indirect HP cylinder can be used
as part of an open vented hot water system, i.e. fed from a cold
water storage cistern and fitted with an open vent pipe, provided
the maximum head does not exceed 30 metres.
When used in this way, it will not be necessary to install the
expansion vessel and cold water inlet manifold supplied with the
cylinder.
! NOTE !
The temperature and pressure relief (T&P) valve must be
left connected to the cylinder (as supplied).
As it may still operate due to temperature, it should be connected
in the correct manner - refer to guidance given in Section 4 of
these instructions.
1.7
PRIMARY CIRCUIT PIPEWORK
CONNECTIONS
All primary circuit pipework connections to the cylinder MUST
be made in accordance with Figures 2-6 to 2-10 as appropriate.
Refer to Section 3 (Primary Circuit Installation) for further details.
1.8
CYLINDER BY-PASS
When either a Grant Aerona³ HPID13R32 (13kW) or HPID17R32
(17kW) heat pump is used with this cylinder, a simple by-pass
MUST be fitted between the primary flow and return pipes at the
cylinder. This by-pass consists of a 22 mm pipe fitted between the
primary flow and return pipes fitted with a 22 mm gate valve.
This by-pass must be set during commissioning. Refer to Section
6.7 of these Installation and User Instructions.
! NOTE !
A by-pass at the cylinder, as described above, is NOT
required for the Grant Aerona³ HPID6R32 (6kW) or
HPID10R32 (10kw) heat pumps, but ONLY when a Grant
Aerona³ HPID13R32 (13kW) or HPID17R32 (17kW) heat
pump is used with this cylinder.
1 INTRODUCTION
Summary of Contents for HPMONO/IND125
Page 38: ...Notes Page 38 NOTES ...
Page 39: ...Notes Page 39 NOTES ...