Grant Aerona3 HPID12R32, Инструкции по установке и обслуживанию

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section 3: Installation Information Page 12
3.7.2 metering for performance (electricity meter)
From the 22nd May 2018, all ASHP installation must be ‘metered
for performance’ to meet OFGEM requirements for the Domestic
RHI.
This basically requires that all ASHPs must be fitted with one (or
more) electricity meters to record and display the electricity used
by:
•
The ASHP
•
Any supplementary heaters for space heating, (e.g. an
immersion heater in a buffer tank) controlled by the same
control system as the ASHP.
•
Any immersion heater used to heat domestic hot water (DHW)
controlled by the same control system as the ASHP (e.g. using
a Grant Auto Boost Kit 2)
This metering on the electrical supply to the heat pump is NOT
used to determine the Domestic RHI payment but to allow users to
monitor the energy consumption and performance of their system.
Domestic RHI payments will continue to be based on either the
EPC annual heat demand or a heater meter reading. Refer to
‘meter for payment’ section for details.
The electricity meter (or meters) used may be installed as either
a separate ‘stand-alone’ meter for each device used, i.e. this may
require up to three mters to be used on a single installation or a
single ‘stand-alone’ meter for all devices used.
Where a single meter is used for more than one device, a separate
sub-consumer unit will also be required to provide separate
proection and isolation for each device concerned.
The electricity meters used must be MID compliant and Class A or
better, remembering that classes B and C are better than A.
3.8 Volumiser tanks
A ‘Volumiser’ tank is simply a vessel used to increase the volume
of the system, to meet the system requirements as given below.
It will have only two connections, one inlet and one outlet, and it
must be fitted in the return to the heat pump. Refer to Figure 3-5.
systEm conDItIons
A ‘Volumiser’ tank will be required for the Grant Aerona³
HPID12R32 (12kW) heat pumps when:
•
The overall system volume is less than 100litres
AND
•
If the part of the system connected to the heat pump is less
than 30 litres during the normal operation of the system
For example:
•
When the heating zone valves(s) are closed leaving only the
primary circuit to a cylinder connected to the heat pump,
OR
•
When the hot water zone valve is closed leaving a heating
zone (or zones) connected to the heat pump
The ‘Volumiser’ tank must be large enough to ensure that the
volume of that part of the system will be at least 30 litres.
The water pump, fitted in the heat pump, is supplied factory set at
Level 3 (maximum output). It is unlikely that this level of output will
be required, so it is recommended that the pump output is reduced
to either Level 2 (medium output) or Level 1 (minimum output) as
required. This will usually be indicated by achieving a temperature
difference between the heat pump flow and return of approximately
8°C when the heating system is operating and up to temperature.
Refer to Section 8.3.6 for guidance on how to do change the pump
output level.
To determine the temperature difference between flow and return,
check the flow and return temperatures using the ‘Monitor Display
Function’ on either the remote controller or Terminal PCB. Refer
to Section 10.7 for guidance on how to check the flow and return
water temperatures.
A 30 litre ‘Volumiser’ tank, suitable for this purpose, is available
from Grant UK (product code: HPIDVOL30). For further
information, please contact Grant UK on +44 (0)1380 736920.
3.9 Hot Water cylinders
When a Grant Aerona³ HPID12R32 (12kW) heat pump is used with
any model of Grant Heat Pump hot water cylinder, either a single
or twin coil unit, a simple bypass MUST be fitted between the
primary flow and return pipes at the cylinder.
This bypass consists of a 22mm pipe between the primary flow and
return pipes, fitted with a 22mm gate valve.
Refer to Figure 3-4 for details.
2
1
2 3
4
5 6
7
8
9
15
Static head of system
10 11
10 11
13
14
12
16
figure 3-4: Cylinder coil bypass
This bypass must be set during commissioning, as follows:
First, set the water pump output to Level 1 (minimum). Refer to
Section 8.3.6.
With the system operating to only heat the cylinder (i.e. with no
space heating demand), progressively open the gate valve and
reduce the flow of water through the cylinder coil enough to prevent
any water flow noise from the cylinder.
A bypass at the cylinder, as described above, is required for
the Grant Aerona³ HPID12r32 (12kW) heat pump.
! nOtE !