gledhill BMA 180 HP-DEM Installation & Servicing Instructions Manual page 27

16A 16A 6A
L
BUS BAR
230V 50Hz AC
32 amp supply from a
double pole isolator
located within 1 metre
of the appliance
Blk
3
Room thermostat (Zone 1)
IMPORTANT
Electricians/Installers Please Note
The 2 x 16A MCB's (MCB1 and MCB2) for the central heating and hot water electric
boost heaters are supplied set in the 'OFF' position by an adhesive warning label.
MCB3 is supplied set in the 'ON' position. The heat pump/primary systems can
be commissioned with the switches in these positions and MCB1 and MCB2
must not be switched on before the heat pump/primary systems have been fully
tested/commissioned.
After these have been commissioned, move MCB1 and MCB2 to the 'ON' position
which will break the warning label and then commission the electric boost facility.
Ensure that all air has been vented from the primary system before doing this.
Z1 Z1 Z1 Z1 Z2
Z2
N
L1 L2 L3
RS RS RS RS RS RS
N L SL E N
L
Remove link
to wire room
thermostat
Use to connect the
CH zone 2 time and
temperature controls
to the BoilerMate
A-Class HP-DEM
appliance
Br
Bl G/Y
1 2
Page 27
INSTALLATION
Electrical Connection - Appliance
All the power and control functions of the
BoilerMate A-Class HP-DEM are pre-wired to a
Z2 Z2 V1
V2 V V
terminal strip located at high level inside the
RS RS L L E N
appliance. The wiring to the appliance shall be
SL E
carried out by a competent person in accordance
with the Building Regulations (Approved
Document P) and the IEE Requirements for
Electrical Installations BS 7671. Details of the
necessary wiring are shown opposite and on
the electrical schematic drawing (see pages
26 and 27).
All the terminals are suitably labelled on the
appliance.
Note: Do not attempt the electrical work unless
you are competent to carry it out to the above
standards.
Before commencing check that the power source
is in accordance with the Site Requirements and
ensure that it is isolated.
The heat pump wiring instructions (Appendix
A) should be read in conjunction with this
manual.
Run the external wiring through the service slot
provided in the base of the appliance.
Make the connections as shown opposite on
the terminal strip provided.
The room thermostat should be wired as shown
opposite. The link in Z1RSL to Z1RSSL must be
removed when the room thermostat is fitted.
The time and temperature controls for CH zone
2 should be wired as necessary into the Z2
terminals provided.
Before switching on the electrical supply
check all the factory made terminal
connections to ensure they have not become
loose during transit.
Frost/Building Fabric Protection
When frost protection is required for the whole
house set channel 2 of the clock to constant
during the time required and adjust the room
thermostat to a suitable setting.