12
Technical data
Installation and operating instructions
71
Gas Combi Unit
Floor-standing gas condensing boiler with integrated heat storage
008.1543899_02 – 04/2019 – EN
Combination heater for
gaseous fuels
Boiler type
Unit
GCU compact
315 /
315 Biv
320 /
320 Biv
515 /
515 Biv
520 /
520 Biv
524 /
524 Biv
528 /
528 Biv
Hot water tank
(characteristic data ac-
cording to Ecolabel regu-
lation (EU) 812/2013)
Class for domestic hot water preparation
energy efficiency
-
B
B
B
B
B
B
Heat retention losses
W
64
64
72
72
72
72
Hot water storage tank volume
L
294
294
477
477
477
477
Tab. 12-5
Characteristic data for determining the values for energy efficiency identification
Type of integrated temperature controller
RoCon B1 /
BM2
Parameters
Unit
Class of the temperature controller
II
Contribution to the seasonal space
heating energy efficiency
%
2.0
Tab. 12-6
Product data sheet for integrated controller RoCon B1/
BM2
Type of connected room station
RoCon U1
Parameters
Unit
Class of the temperature controller
VI
Contribution to the seasonal space
heating energy efficiency
%
4.0
Tab. 12-7
Product data sheet for controller GCU c con-
nected room station RoCon U1
Special precautions for installation and maintenance can be found in
the installation and operating instructions. Energy efficiency labels
and product data sheets for additional combinations, packages and
other products can be found at
.
Sound power in heating mode, measured according to EN 15036 un-
der the conditions of EN ISO 3746, accuracy class 3.
This data is used to compare energy efficiency according to the En-
ergy Labelling Directive 2010/30 EC. For the correct selection of
products for your application, contact your dealer.
Boiler type
GCU compact
Parameters
Unit
315 /
315 Biv
320 /
320 Biv
515 /
515 Biv
520 /
520 Biv
524 /
524 Biv
528 /
528 Biv
Condensing boiler
-
Yes
Combination heater
-
Yes
Rated heat output P
rated
kW
15
19
15
19
23
27
Useful heat output
kW
For rated thermal output and high temperature operation
(32)
P
4
14.6
19.5
14.6
19.5
23.4
27.2
At 30 % of the rated thermal output and low temperature opera-
tion
(33)
P
1
4.8
6.5
4.8
6.5
7.8
9.1
Seasonal space heating energy efficiency η
S
%
91
92
91
92
92
92
Efficiency
%
For rated thermal output and high-temperature operation
(32)
η
4
87.4
87.7
87.4
87.7
88.0
88.0
At 30 % of the rated thermal output and low temperature opera-
tion
(33)
η
1
96.7
97.2
96.7
97.2
97.2
97.2
Auxiliary power consumption
kW
At full load elmax
0.036
0.038
0.036
0.038
0.038
0.038
At partial load elmin
0.019
0.020
0.019
0.020
0.020
0.020
In standby mode P
SB
0.003
0.003
0.003
0.003
0.003
0.003
Heat loss in standby mode P
stby
kW
0.047
0.047
0.047
0.047
0.047
0.047
Annual energy consumption Q
HE
kW
(GJ)
7692
(28)
9739
(35)
7692
(28)
9739
(35)
11870
(43)
13522
(49)
Noise power level indoors L
WA
dB(A)
53
58
53
58
61
64
Nitrogen oxide output
mg/kWh
23
31
23
31
31
31
Load profile
-
Domestic hot water preparation energy efficiency
%
77
77
84
82
84
84
Daily power consumption Q
elec
kWh
0.425
0.464
0.466
0.510
0.460
0.463
Annual power consumption AEC
kWh
31
41
39
35
34
36
Daily fuel consumption Q
fuel
kWh
14,717
14,680
22,198
22,884
22,379
22,337
Annual fuel consumption AFC
GJ
11
11
17
17
17
17
Tab. 12-8
Technical data sheet GCU compact
(32)
High-temperature operation means a return temperature of 60 °C at the heater inlet and an inflow temperature of 80 °C at
the heater outlet.
(33)
Low temperature operation means a return temperature at the heater inlet for condensing boilers of 30 °C.
Summary of Contents for GCU compact Series
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