Technical Manual

Vitocell 300-H in a Multiple Tank Installation
VITOCELL 300-H 7
Technical data
Three possible combinations are shown below as examples.
Please note the maximum number of tank units which may be stacked upon one another.
Total capacity of tank battery
Number of storage tanks
Storage capacity per tank
USG
ltr
USG
ltr
184
700
2
92
350
238
900
2
119
450
357
1350
3
119
450
Layout Max. number of tanks which
may be stacked on top of
each other
Max. number of tanks which
may be stacked on top of
each other
Recovery rates
*1
with a temperature rise
of the domestic hot
w
a
t
e
r
f
r
o
m
194°F
90°C
MBH
GPM
ltr/h
478
10.6
2408
560
12.4
2820
839
18.6
4230
w
a
t
e
r
f
r
o
m
50 to 140°F /
10 to 60°C
and heating water
s
u
p
p
l
y
t
e
m
p
e
r
a
t
u
r
e
176°F
80°C
MBH
GPM
ltr/h
348
7.7
1754
423
9.4
2132
635
14.1
3198
s
u
p
p
l
y
t
e
m
p
e
r
a
t
u
r
e
of . . . . . .
at the supply flow rate
stated below
158°F
70°C
MBH
GPM
ltr/h
232
5.2
1170
266
5.9
1342
399
8.9
2013
Supply flow rate
GPM
m
3
/h
44
10
44
10
66
15
for the recovery rates stated
Recovery rates
with a temperature rise
of the domestic hot
w
a
t
e
r
f
r
o
m
7½
psig
MBH
GPM
ltr/h
566
18.0
4078
566
18.0
4078
850
27.0
6117
o
f
t
h
e
d
o
m
e
s
t
i
c
h
o
t
water from
50 to 113°F /
10 to 45°C,
a steam pressure of . . . . . .
and a max. steam velocity of
164 ft/s, 50 m/s
15
psig
MBH
GPM
ltr/h
717
22.7
5160
717
22.7
5160
1075
34.1
7740
Standby losses
*2
MBH/24 h 13.0 14.3 21.5
*1
When planning for the recovery rate as stated or calculated, allow for the corresponding circulation pump.
The stated recovery rate is only achieved when the rated output of the boiler is equal to or greater than that stated under “Recovery
rates”.
*2
Measured values are based on a room temperature of 68 ºF / 20 ºC and a domestic hot water temperature of 149 ºF / 65 ºC and can
vary by ±5%.
Installation of additional aquastat(s)
Ensure that temperature tempering valve(s)
is/are installed if the domestic hot water
storage tank temperature exceeds 140°F /
60°C to protect from scalding.
Consult plumbing codes and authorities for
local requirements.
5
1
6
7
5
3
4
-
0
1
In a multiple tank installation, it is
recommended that an additional high
limit aquastat be installed in the
common domestic hot water supply
header to the system. This aquastat
should be wired in series to the
operating aquastat on the tank
battery. The setting on this additional
high limit aquastat should be
approximately 9°F / 5°C higher than
the operating high limit.
WARNING