Evo Heat Pump Manual Version 5
Page 25 of 84
vi.
It is advisable that a cold feed connection is connected on the ground and distribution side. This
connection must follow WRAS regulations and disconnected when not in use. A cold fill connection
kit is available as an extra from Kensa and can be used if plumbed (as below) to top up the ground
or distribution systems.
A ground side expansion vessel can also be fitted if required.It maintains the pressure within the
ground loop as the pipe relaxes.
A suitably sized vessel would be 4l (225 x 195mm) and is available
from plumber suppliers or Kensa. If one is not fitted it maybe necessary to top the pressure up
at a
future site visit. If an open loop or pond mat system is being used Kensa would always
recommend fitting an expansion vessel.
vii.
Using the stickers provided ensure the flow and return connections are indicated on the manifold.
viii.
Connect the feed & return pipes from the underfloor heating manifold according to the Illustration
above.
ix.
The heating distribution side should also have an appropriate sized expansion vessel and WRAS
approved make up kit installed in an accessible position and disconnected when not in use. (As per
the drawing above)
x.
Check and rectify any leaks that may be in the plumbing system.
xi.
The appliance should be left for 12 hours after installation before it is turned on, to allow the re-
frigerant to settle.
xii.
The area where the heat pump is installed must be dry and rodent free.
Flow to
heating
system
from heat
Pump 28 mm
OD
Return from
heating
system
to heat
pump
28 mm OD
Supply to
Ground from
heat pump 28
mm OD
Return from
ground to
heat pump 28
mm OD
Fig 17 Evo Single Compressor heat pump connections
H
eat P
u
mp
se
ttin
gs
s
h
ee
t
W
arr
an
ty
Fau
lt
Fi
n
d
in
g
Co
n
tr
o
lle
r
Me
ch
an
ic
al s
et
to
ru
n
El
ec
tr
ic
al
in
stal
lati
o
n
Me
ch
an
ic
al
in
stal
lati
o
n
In
stal
lati
o
n
G
en
e
ral
p
ro
d
u
ct
in
fo
rmatio
n
Safet
y
in
fo
rmatio
n
In
tr
o
d
u
cti
o
n
Mains feed connection
Double check valve and
isolation valve
Distribution connection
and isolation valve.
Ground array connection
and isolation valve.
Flexible pipe
Fig 18 Suggested
Fill loop