Hot Water
Energy
Storage
Unvented Cylinder
Installation & Maintenance Instructions for an unvented
hot water cylinder with internal thermal expansion
SEPT 2018
16
Connections:
A
22mm Inlet control set – cold feed
B
22mm Hot water draw-off
C
Tundish drain off
D
Secondary return
(210L, 250L & 300L)
E
28mm Flow from boiler
F
28mm Return to boiler
G
Connection - Central heating flow
two port valve zone 1
H
Connection - Central heating flow
two port valve zone 2
I
28mm Return from radiator circuit
J
22mm DHW two port valve
K
†
Immersion heater & dual thermostats
L
Filling loop flexible hose
M
Wiring centre
N
Circulating pump
O
Manual bottle air eliminator
P
Auto bypass valve
Q
Cold feed drain
C
B
D
O
M
G
K
J
H
A
Q
L
P
I
F
E
N
INDIRECT PRE-PLUMBED
SOLAR INDIRECT PRE-PLUMBED
Litres
Height
(mm)
Dia.
(mm)
A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
F
(mm)
G
(mm)
H
(mm)
118
1001
580
834
655
452
NF
92
196
204
204
149
1187
580
1020
841
638
NF
122
226
234
234
178
1371
580
1204
1025
822
NF
152
256
264
264
205
1561
580
1270
1091
888
1026
152
256
264
264
242
1806
580
1515
1336
1133
1271
187
291
299
299
285
2076
580
1750
1588
1385
1523
187
291
299
299
N/F = Not Fitted
† Not to be used as the primary heat source
N/F = Not Fitted
† Not to be used as the primary heat source
Litres
Height
(mm)
Dia.
(mm)
A
(mm)
B
(mm)
C
(mm)
D
(mm)
E
(mm)
F
(mm)
G
(mm)
H
(mm)
S
(mm)
175
1371
580
1321
1025
806
NF
649
739
751
751
349
201
1561
580
1421
1091
872
1026
699
789
801
801
379
243
1806
580
1421
1336
1117
1271
769
859
871
871
379
285
2076
580
1721
1588
1369
1523
799
889
901
901
414
A
K
E
Q
D
P
S
O
M
B
C
J
I
H
F
G
N
Connections:
A
22mm Inlet control set – cold feed
B
22mm Hot water draw-off
C
Tundish drain off
D
Secondary return
(210L, 250L & 300L)
E
28mm Flow from boiler
F
28mm Return to boiler
G
Connection - Central heating flow
two port valve zone 1
H
Connection - Central heating flow
two port valve zone 2
I
28mm Return from radiator circuit
J
22mm DHW two port valve
K
†
Immersion heater & dual thermostats
L
Filling loop flexible hose
M
Wiring centre
N
Circulating pump
O
Manual bottle air eliminator
P
Auto bypass valve
Q
Cold feed drain