Section 7: Installation of Heat and Electricity Meters
Page 22
7.1 General
As not all installations will require a heat meter and electricity
meter, the Grant VortexAir Hybrid is supplied without any meters
fitted. Usually only installations receiving a Renewable Heat
Incentive (RHI) payment will require both these meters to be
fitted.
Both meters are available as accessories from Grant UK for on-
site fitting by the installer:
•
Heat meter (Grant product code: HPIDMETER)
•
Electricity meter (Grant product code: HPIDKW/HMETER)
When required, only the meters supplied by Grant UK (as
listed above) must be used with the Grant VortexAir hybrid.
NOTE
!
In accordance with MCS metering requirements, the Grant
VortexAir Hybrid is supplied ‘meter ready’ to allow both the heat
meter and electricity meter to be easily fitted when required, as
follows:
•
The necessary temperature sensor points and valved
sections are incorporated in the pipework (inside the boiler
casing) for installation of the flow meter and temperature
sensors of the heat meter.
•
A purpose made (DIN rail) mounting and housing is
provided for both the heat meter integrator unit and the
electricity meter.
•
A 1A fused power supply for the heat meter is provided
within the meter housing.
•
The incoming power to the heat pump is located inside the
meter housing for connection to the electricity meter.
7.2 Heat Meter
When correctly installed, this heat meter will measure and record the
heat produced by the heat pump only.
7.2.1 Description
The Sontex Superstatic 440 heat meter, supplied by Grant for
use with the Grant VortexAir Hybrid, consists of the following
components:
a) Integrator unit (Supercal 531)
This calculates the heat produced by the heat pump from
the information provided by the flow meter and the two
temperature sensors (see below). The heat produced by the
heat pump, along with the flow and return water temperatures,
can be displayed on the integrator screen if required.
Refer to Section 7.4 (or the Instructions supplied with the
heat meter kit) for guidance on how to access the information
available on the integrator screen.
When fitted, the integrator unit is located in a purpose made
housing immediately above the control panel. Refer to Figure
7-1.
7 Installation of Heat and Electricity
Meters
Figure 7-1:
Location of integrator meter when fitted
Heat
meter
b)
Flow meter (fluid oscillator flow sensor)
This measures the flow of water in the primary circuit when
the heat pump is operating. This flow rate can be displayed,
if required, on the integrator screen.
The flow meter is installed in the heating return pipe to the
heat pump. Refer to Figure 7-2. For details of how to install
the flow meter refer to Section 7.2.1.
Figure 7-2:
Heating return pipework
c)
Return temperature sensor
This measures the return water temperature. This
temperature can be displayed, if required, on the integrator
screen.
The sensor is fitted in a ‘dry pocket’ (supplied with the heat
meter kit) that is installed in a tapping located in the return
pipe to the heat pump (just above the flow meter). Refer to
Figure 7-2.
For details of how to install the return temperature sensor
refer to Section 7.2.5.
d)
Flow temperature sensor
This measures the flow water temperature. This temperature
can be displayed, if required, on the integrator screen.
The sensor is fitted in a ‘dry pocket’ (supplied with the heat
Electricity
meter
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