Installation manual
7
1.2.4 M
AINTENANCE
•
If the heat pump may be disconnected from the power supply for prolonged periods of time, or where power
supplies are susceptible to failure, antifreeze must be added to the system (e.g. mono ethylene glycol at 25%
volume to protect down to -14°C).
•
Never use cleaning agents containing sand, soda, acid or chloride as these can damage surfaces/components.
•
We recommend the installation of a suitable filtration protection system and the use of a corrosion additive for the
heating system to prevent the formation of deposits (e.g. oxide and solids) in the condenser of the heat pump. The
return isolation valve provided in the hydraulics pack has a built in strainer to help prevent debris entering the
condenser and must be fitted.
1.2.5 E
LECTRICAL
W
ARNINGS
•
Before removing the cover of the heat pump, cylinder or wiring centre, ensure that all electrical circuits are isolated.
•
Means for disconnection from the supply mains must be incorporated into the fixed wiring in accordance with the
national wiring regulations.
•
This device must be installed in accordance with national wiring regulations.
•
This device is suitable for mains connection only (230V, 1P&N, 50Hz) and is not suitable for operation with an
electrical generator or power modulator, due to possible effects on the quality of the electrical supply. Any attempt to
do so will void warranty.
•
The local wiring regulations should always be followed paying particular attention to the mixing of low voltage and
extra low voltage cabling.
•
Ensure the incoming power supply and the distribution board are suitably rated.
•
Ensure that the regulations specified by the local electricity supplier have been adhered to.
•
All fuse rating and protective overload device information is provided in the wiring label located on the inside of the
front bottom panel of the heat pump. For instruction on how to remove this panel please see section 3.3.1.
•
The correct earthing (grounding) of the heat pump is of the utmost importance and must be reinforced by
−
Using an earth (ground) wire of at least 10mm
2
, OR;
−
Using two separate earth (ground) wires, both complying with the dimensioning rules as set out by local and
national regulations.
NOTE: T
HE
INSTALLATION
OF
A
HEAT
PUMP
DESIGNATED
RESIDUAL
CURRENT
DEVICE
(
TYPE
B RCD)
HAVING
A
RATED
RESIDUAL
OPERATING
CURRENT
NOT
EXCEEDING
30mA
IS
RECOMMENDED
,
IN
ACCORDANCE
WITH
LOCAL
REGULATIONS
(BS7671
FOR
UK
INSTALLATIONS
).
NOTE: T
WO
SEPARATE
,
DESIGNATED
RCD
DEVICES
SHOULD
BE
FITTED
-
ONE
FOR
THE
HEAT
PUMP
AND
ONE
FOR
THE
CYLINDER
. T
HE
HEAT
PUMP
SYSTEM
MUST
NOT
SHARE
AN
ALREADY
EXISTING
DOMESTIC
RCD
DEVICE
.
NOTE: T
HE
HEAT
PUMP
HAS
A
HIGH
LEAKAGE
CURRENT
AND
MUST
BE
PROPERLY
GROUNDED
FOR
SAFETY
IN
ACCORDANCE
WITH
LOCAL
AND
NATIONAL
REGULATIONS
REGARDING
EQUIPMENT
WITH
A
LEAKAGE
CURRENT
EXCEEDING
3.5m
A
.