Viessmann EHA Series Technical Data Manual
Technical Data Manual
Model Nos. and pricing: see Price List
VITOCELL 300-H
EHA Series
Indirect-fired domestic hot water storage tank
42 to 119 USG (160 to 450 L)
Product may not be exactly as shown
Vitocell 300-H
EHA Series
Horizontal indirect-fired domestic hot water storage
tank made of high-grade stainless steel
5696 674 - 03 02/2018
Product Information
Benefits
Fully hygienic, efficient and economical domestic hot
water production with DHW tanks of high-grade stainless
steel – horizontal version.
Benefits at a glance:
H Corrosion-resistant tank of high-grade SA 240-316 Ti
stainless steel offers a long service life.
H Fully hygienic due to high quality homogeneous
stainless steel surfaces.
H The high-alloy material is immune to cracking or
peeling. The tank stays hygienic and requires only
minimum service.
H The entire water content is heated by a 1¼” (32 mm)
diameter stainless steel heat exchanger surface which
extends to the bottom of the tank.
H Certified to CSA Low Lead Content Certification
Program; including US Safe Drinking Water Act,
NSF/ANSI 372 as well as other applicable US State
requirements.
Vitocell 300-H, EHA Series Technical Data
H The positioning of the tubular heat exchanger coil
further ensures that 82 to 97% of the tank volume
can be drawn at constant water temperature.
H The stainless steel heat exchanger coil is self-venting
towards the top and self-draining towards the bottom,
therefore not susceptible to reduced heat transfer due
to air lock or sediment deposits.
H Standby losses minimized by 2¼” (58 mm) highly
effective, foamed-in-place HCFC-free insulation.
H Easy transport into mechanical room due to low
weight and compact construction.
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5696 674 - 03
Vitocell 300-H, EHA Series Technical Data
Cross Section
Product Information
2¼” (57 mm) thick
foamed-in-place
HCFC-free insulation
Non-finned, stainless steel,
tubular heat exchanger coil
extends to tank bottom – the
entire water volume is heated
ensuring no cold spots where
bacteria growth could occur
Tank is constructed of
high-grade SA 240-316
Ti stainless steel
Inspection port/
clean-out opening
Product may not be exactly as shown
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Technical Data
Technical Data
Vitocell 300-H, EHA Series Technical Data
For domestic hot water heating applications which
utilize hot water heating boilers
Suitable for heating systems with:
H max. working pressure on heat exchanger
side up to 220 psig at 392°F (200°C)
H Only for 92 and 119 USG (350 and 450 L)
saturated steam 15 psig at 250°F (121°C)
H max. working pressure on DHW water side
of up to 150 psig at 210°F (99°C)
Storage capacity USG (L) 42 (160) 53 (200) 92 (350) 119 (450)
Recovery rates*1
with a temperature rise
water from 50 to 140°F
(10 to 60°C) and heating
water supply temperature of
. . . . . . at the supply flow
rate stated below
194°F MBH (kW)
(90°C) GPH (L/h)
176°F MBH (kW)
(80°C) GPH (L/h)
158°F MBH (kW)
(70°C) GPH (L/h)
96 (28)
126 (482)
78 (23)
108 (396)
51 (15)
66 (258)
113 (33)
150 (568)
85 (25)
114 (430)
58 (17)
78 (292)
239 (70)
318 (1204)
174 (51)
234 (877)
116 (34)
156 (585)
280 (82)
372 (1410)
212 (62)
282 (1066)
133 (39)
180 (671)
Supply flow rate
for the recovery rates stated GPM (m
Recovery rates *5
with a temperature rise of
the domestic hot water from
50 to 113°F (10 to 45°C)
a steam pressure of . . . .
7b psig MBH (kW)
GPH (L/h)
15 psig MBH (kW)
GPH (L/h)
3
/h) 13.2 (3.0) 22.0 (5.0) 22.0 (5.0) 22.0 (5.0)
-- -- 283 (83)
539 (2039)
-- -- 358 (105)
682 (2580)
283 (83)
539 (2039)
358 (105)
682 (2580)
and a max. steam velocity
of 164 ft/s (50 m/s)
Standby losses*2 MBH/24h 4.0 4.2 6.0 6.6
Overall dimensions
Overall depth
Overall width
Width without enclosure
Overall height
in. (mm)
in. (mm)
in. (mm)
in. (mm)
42a (1072)
25a (640)
--
25c (654)
48c (1236)
25a (640)
--
25c (654)
62b (1590)
32c (830)
30a (768)*3*4
31 (786)
65 (1654)
35c (910)
32 (810)*4
35 (886)
Weight
Tank with insulation lb (kg) 168 (76) 185 (84) 379 (172) 421 (191)
Heating water content
(heat exchanger pipe coil) USG (L) 1.8 (7) 2.1 (8) 3.4 (13) 4.2 (16)
Heat exchanger surface area ft
2
(m2) 9.36 (0.87) 9.7 (0.9) 18.3 (1.7) 22.6 (2.1)
Connections
Heating water supply/return
Domestic cold/hot water
Temp. and press. relief valve
7" (male thread)
7” (male thread)
7” (male thread)
c
c
1
c
1
1
1a
1a
1
1a
1a
1a
*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”. Please also refer to the corresponding sizing chart at the end of this manual.
*2 Measured values are based on a room temperature of 68ºF (20ºC) and a domestic hot water temperature of
149ºF (65ºC) and can vary by ±5%.
*3 To overcome mechanical room access problems, the front panel with thermometer and side panels can be
removed, the adjustable feet unscrewed, and the Vitocell 300-H turned on its side.
*4 This is the net width of the Vitocell 300-H after removing the outer casing to ease problems of access into
the mechanical room.
*5 Only for 92 and 119 USG (350 and 450 L) saturated steam 15 psig at 250°F (121°C)
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5696 674 - 03
Vitocell 300-H, EHA Series Technical Data
42 and 53 USG (160 and 200 L)
Technical Data
Dimensions
Storage capacity USG (L) 42 (160) 53 (200)
a in. (mm) 34 (866)
40b (1030)
92 and 119 USG (350 and 450L)
Dimensions
Storage capacity USG (L) 92 (350) 119 (450)
a in. (mm) 55 (1397)
b in. (mm)
c in. (mm)
d in. (mm)
e in. (mm)
f in. (mm) 3 (78) 3 (78)
g in. (mm)
h in. (mm) 23 (586) 25 (636)
k in. (mm)
l in. (mm)
2a (57) 2c (72)
5b (139) 5b (138)
6c (170)
5a (133) 5a (137)
14b (368)
7b (193)
23b (594) 26c (677)
57b (1461)
8 (203)
16 (409)
9 (226)
Legend
AQ Aquastat Well
BWR Boiler Water Return
BWS Boiler Water Supply
DCW Domestic Cold Water
DHW Domestic Hot Water
IO Inspection and Clean-out Opening
TPV Temperature and Pressure Relief Valve
Legend
AQ Aquastat Well
BWR Boiler Water Return
BWS Boiler Water Supply
DCW Domestic Cold Water
DHW Domestic Hot Water
IO Inspection and Clean-out Opening
TPV Temperature and Pressure Relief Valve
RT Recirculation tapping
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