Viessmann VITOCELL 300-H Technical Data Manual page 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
Layout
*1
Recovery rates
194°F
with a temperature rise
90°C
of the domestic hot
water from water from
50 to 140°F /
176°F
10 to 60°C
80°C
and heating water
supply temperature supply temperature
of
. . . . . . 158°F
at the supply flow rate
70°C
stated below
Supply flow rate
for the recovery rates stated
Recovery rates
7½
with a temperature rise
psig
of the domestic hot of the domestic hot
water from water from
15
50 to 113°F /
psig
10 to 45°C,
a steam pressure of
. . . . . .
and a max. steam velocity of
164 ft/s, 50 m/s
*2
Standby losses
*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)
WARNING
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.
VITOCELL 300-H
USG
ltr
USG
ltr
Max. number of tanks which
may be stacked on top of
MBH
GPM
ltr/h
MBH
GPM
ltr/h
MBH
GPM
ltr/h
GPM
3
m /h
MBH
GPM
ltr/h
MBH
GPM
ltr/h
MBH/24 h
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.
Vitocell 300-H in a Multiple Tank Installation
184
700
2
92
350
each other
478
10.6
2408
348
7.7
1754
232
5.2
1170
44
10
566
18.0
4078
717
22.7
5160
13.0
238
900
2
119
450
Max. number of tanks which
may be stacked on top of
each other
560
12.4
2820
423
9.4
2132
266
5.9
1342
44
10
566
18.0
4078
717
22.7
5160
14.3
357
1350
3
119
450
839
18.6
4230
635
14.1
3198
399
8.9
2013
66
15
850
27.0
6117
1075
34.1
7740
21.5
7