Features and technical data
Installation, use and maintenance manual – K18 Simplygas
17
1
electronic board please refer to Paragraph 4.4
1.7.2
DHW production control device
The appliance may only produce DHW if it is connected to a con-
trol device, selected from:
1. OQLT021 system controller (optional)
2. Direct control from K18 Simplygas appliance (with DHW
buffer tank probe, optional OSND004), without use of exter-
nal contact
3. Direct control from K18 Simplygas appliance (with DHW
buffer tank probe, optional OSND004) and use of external
contact
1.7.2.1
OQLT021 system controller (optional)
The OQLT021 system controller can manage the buffer tank
DHW production with the K18 Simplygas appliance in the most
comprehensive way.
The main functions for DHW production are:
▶
Selection of the type of DHW function required (continuous
production or only in certain time slots).
▶
Programming of DHW request activation time slots.
▶
Programming of DHW buffer tank setpoints.
▶
Programmed antilegionella disinfection management.
▶
Management of the temperature probe in the DHW buffer
tank.
▶
Diverter valve management.
1.7.2.2
Direct control from the appliance without use of
external contact
The production of DHW, without the help of the OQLT021 sys-
tem controller, will be active 24 hours/day with fixed comfort
setpoint. The actual activation of the service will depend on
the temperature measured by the temperature probe in the
DHW buffer tank. The comfort setpoint will be set to relevant
K18 Simplygas appliance parameter.
1.7.2.3
Direct control from the appliance and use of
external contact
The DHW production management, also in this case carried out
without the help of the OQLT021 system controller, can be made
more flexible by connecting an external device (typically, and
depending on the required function, a timer or a switch) that
allows to activate or deactivate the DHW service request or, al-
ternatively, to switch the required setpoint in the DHW buffer
tank to two different values. The required setpoint values will be
set to the relevant K18 Simplygas appliance parameters.
In the case of using a timer, it will be possible to schedule the
DHW production on the timer itself using two different setpoints
(comfort / reduced, comfort / antifreeze, or comfort / anti-le-
gionella), or providing for the complete deactivation of the DHW
service outside the set time slots.
Through the use of a simple switch, instead, it will not be pos-
sible to schedule the DHW service, but two different setpoints
or alternatively the activation and deactivation of the DHW pro-
duction service will be managed manually.
1.8
TECHNICAL DATA
Table 1.2
K18 Simplygas technical data
k18 Simplygas C1
Heating mode
Seasonal space heating energy efficiency class (ErP)
medium-temperature application (55 °C)
-
A++
low-temperature application (35 °C)
-
A+
Heat output
Outdoor temperature/Delivery temperature
A7W50
kW
17,6
A7W35
kW
18,9
GUE efficiency
Outdoor temperature/Delivery temperature
A7W50
%
157
A7W35
%
169
Heat input
nominal (1013 mbar - 15 °C) (1)
kW
11,4
real
kW
11,2
Hot water delivery temperature
maximum for heating
°C
65
Hot water return temperature
maximum for heating
°C
55
minimum temperature in continuous operation
°C
25 (2)
Heating water flow
nominal
l/h
1000
maximum
l/h
2000
minimum
l/h
400
Ambient air temperature (dry bulb)
maximum
°C
40
minimum
°C
-25
DHW mode
DHW delivery temperature
maximum for DHW
°C
70
DHW inlet temperature
maximum for DHW
°C
60
nominal heat output for DHW at 20 °C ambient
kW
18,9
specific capacity in continuous operation - Δt 30°C
l/min
30,0 (3)
Electrical specifications
Power supply
voltage
V
230
type
-
single-phase
frequency
Hz
50
Electrical power absorption
nominal
kW
0,35
(1)
Relative to NCV (net calorific value).
(2)
In transient operation, lower temperatures are allowed.
(3)
10 minute peak collection of domestic hot water. The exact value depends on the performance of the DHW buffer tank.
(4)
PCI (G20) 34,02 MJ/m³ (15 °C - 1013 mbar).
(5)
PCI (G30/G31) 46,34 MJ/kg (15 °C - 1013 mbar).
(6)
It is possible to reduce gas pipe diameter to 3/8”, ensuring enough gas pressure to the appliance, considering pressure losses of entire gas supply pipe.
(7)
Dimensions including flue gas discharge.
(8)
Sound pressure values in free field, with directionality factor 2, obtained from the sound power value in compliance with standard EN ISO 9614. Sound power Lw 65 dB(A) at maximum
ventilation, 62 dB(A) at minimum ventilation; sound power values detected in compliance with the intensity measurement methodology set forth by standard EN ISO 9614.
