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Sealed primary
system filling/
expansion kit
BoilerMate A-Class
(optional extra)
HP-DEM
Heat
pump
Discharge
pipe
Boilermate A-Class HP-DEM 180 model
Note: With the 210/240 models, the sealed primary system filling/expansion kit will
need to be connected to the Zone 2 return connection or branched into the return
pipework.
Frost Protection
The BoilerMate A-Class HP-DEM appliance
should not be installed in a location where the
contents could freeze. Suitable precautions
should be taken to protect the heat pump/
pipework as recommended in the heat pump
section of this manual.
User Controls
A 2 channel digital programmer is fitted to the
front of the appliance. A separate external room
thermostat will normally be required for the
central heating.
Heating System Bypass
Heating
system
Automatic bypass valves will be required
in the heating systems if it is proposed to
fit thermostatic radiator valves ( TRV's) to
all radiators or fit zone valves to control all
the separate heating circuits. To meet the
requirements of Building Regulations for a
boiler interlock, it is recommended that the
radiator in the area where the room thermostat
is installed should be fitted with lock shield
valves on both connections.
Figure 1.13
Appliance Primary Pipework/Coil Volumes
When calculating the total system volume, allow
10 litres for the primary pipework/coils within
the appliance.
Sealed System kit For The Central Heating
System
An optional sealed system kit as follows can be
supplied with the BoilerMate A-Class HP-DEM.
• Pressure gauge (0 – 4 bar)
• Primary expansion vessel charged to 1.0 bar,
(Size depends upon the model, see Table 1.1)
• WRAS approved primary system filling
loop
External Temperature Compensation
Sensor
This is supplied connected to 10 metres of cable
which is coiled and cable tied to the pipework
at high level in the appliance and will need to
be mounted on an external wall and wired back
to the BoilerMate A-Class HP-DEM appliance
using the cable supplied. The sensor shall
be located in a position which is not unduly
affected by wind/direct sunlight etc. On this
basis a sheltered location on a north facing wall
is recommended.
Page 21
DESIGN
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