APR 2018
3
Hot Water Energy Storage
Unvented Cylinders
GB & NI
Installation & Maintenance Instructions for an unvented
hot water cylinder with external thermal expansion
YOUR CYLINDER AND ITS COMPONENTS
The unvented cylinder comes complete with the necessary
fittings, safety and control devices needed to connect to
the cold water mains. All have been pre-adjusted. High
quality controls have been selected to combine high flow
rate performance with minimum pressure drop to make the
unvented cylinder perform well in all areas, even those with poor
water pressure. See insert sheet for a list of spare parts.
TABLE OF COMPONENTS
All cylinders are supplied with installation and maintenance
instructions, an inlet control set, a temperature and pressure
relief valve, an acetal tundish and an external expansion vessel.
Some products are fitted with a new smart immersion heater –
see the inside of the immersion heater cap to determine which
type your product has.
If the water quality is aggressive or the cylinder is to be used on
a system with a heat pump that struggles to achieve the set
temperature, we recommend exchanging the immersion heater
for a titanium element.
Table 1:
Supplied components
YOUR CYLINDER AND ITS COMPONENTS
Pr
ogr
am
m
ab
le R
oo
m T
he
rm
os
ta
t
Tw
o C
han
ne
l P
ro
gr
am
m
ab
le R
oo
m
Th
er
m
os
ta
t w
ith D
H
W C
on
tr
ol
Ro
bo
-k
it in
cl
udin
g
H
ea
tin
g E
xp
an
si
on V
es
sal
Se
ns
or
P
ock
et
R
et
ain
in
g B
un
gs
Si
ngl
e H
igh L
im
it T
he
rm
os
ta
et
D
ual T
he
rm
os
ta
t 1 Z
on
e H
ea
tin
g
Two
-P
or
t V
al
ve
Im
m
er
si
on
H
ea
te
r (
In
di
re
ct
)
Im
m
er
si
on
H
ea
te
r (
D
ire
ct
)
Indirect Pre-Plumb Models – 1 Zone
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•
•
•
•
•
•
Indirect Pre-Plumb Models – 2 Zone
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•
•
•
•
•
•
•
System Fit Indirect Pre-Plumb Models – 1 Zone & 2 Zone
•
•
•
•
•
Solar Indirect Pre-Plumb Models – 1 Zone
•
•
•
•
•
•
•
•
Solar Indirect Pre-Plumb Models – 2 Zone
•
•
•
•
•
•
•
•
•
Indirect Models, Slimline Indirect Models, Indirect
Horizontal Models and Heat Pump Models
•
•
•
Direct Models (Electric) and Slimline Direct Models
(Electric)
•
Solar Direct Models
•
•
•
•
Solar Indirect Models and Solar Indirect Heat Pump Models
•
•
•
•
•
