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Manual air vent (MAV)
relief valve
S4
S7
Externally
mounted
temperature
CH
compensation
boost
sensor
3kW
S5
Boiler
HP
Buddy
(primary)
circulator
P1
Heat
pump
Sealed primary system expansion/filling
components available as an optional extra
Once installed and commissioned, the integration of all the heat pump, domestic
hot water and central heating functions will be automatically controlled by the PCB
built into the BoilerMate A-Class HP-DEM appliance. However, the temperature of the
central heating will need to be controlled by remote room thermostat(s)/thermostatic
radiator valves.
Details of how to enter this product in SAP are available. Please request a copy of
the latest SAP Data Sheet which covers this and all other Gledhill Water Storage
products.
In the event the heat pump fails, both the domestic hot water and central heating
(partial only) can be heated using the built in electric heaters. This manual emergency
heating mode can be selected by pressing the button labelled 'switch' on the appliance
front panel for 5 seconds. Even in this mode the controls will give priority to the hot
water. However, the appliance should only be operated in this mode for the short
period of time required for the problem to be resolved.
The BoilerMate A-Class HP-DEM is designed to be sold as part of a package with the
Mitsubishi Electric Ecodan air source heat pump. The combination of the BoilerMate
A-Class HP-DEM and the Mitsubishi Electric Ecodan air source heat pump has been
the subject of independent testing by BRE and a report is available on request. To
allow a visual indication of system water quality and to protect the waterways of
the heat pump from contamination a Fernox Boiler Buddy is provided as part of the
package.
HWS expansion vessel(s) supplied separately
T&P
Primary
relief
valve
CH zone
HW zone
valve
valve
MAV
System
circulator P2
IV
S6
Discharge
Zone 2 CH
circulator P3
IV
Zone 1 CH system (radiators or underfloor)
Automatic
bypass valve
(if required)
IV
IV
BoilerMate 210/240 HP-DEM
with the appliance for fitting on site
S1/2
HWS
boost
3kW
S3
pipe
IV
Scale Protection
The Building Regulations L1A: New dwellings/
L1B: Existing dwellings and the requirements set
out in the Domestic Heating Compliance Guide
specify that "where the mains water hardness
exceeds 200ppm provision should be made to
treat the feed water to water heaters and the hot
water circuit of combination boilers to reduce
the rate of accumulation of lime scale" .
To comply with this requirement the hardness
of the mains water should be checked by the
installer and if necessary the optional factory
fitted in-line scale inhibitor should be specified
at the time of order for hardness levels between
200 and 300 ppm (mg/l).
Where the water is very hard ie 300ppm (mg/l)
and above the optional polyphosphate type,
inhibitor should be specified at the time of
order. However, this will need to be fitted by
the installer at a suitable point in the cold water
supply to the appliance.
Page 7
DESIGN
Secondary HWS
return connection
HWS outlet
Combination
valve
MCWS
Discharge
inlet
pipe
Balanced
CWS outlet
Zone 2 CH system (underfloor or other
low temperature heating system)
Figure 1.2
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