F-Water Heater
Domestic hot water module.
Domestic hot water module for commercial buildings and multi-family houses.
Application
The F-Water Heater is based on the
charging principle of domestic hot
water. The function of the unit is to
heat water in a heat exchanger and to
transport the domestic hot water into
a storage cylinder. The storage cylinder is not included in the delivery. The
unit is delivered with an insulated plate heat exchanger.
In the standard product program the
range covers loads from 69 kW to 1250
kW. This means that middle-sized and
larger commercial buildings and multi-family houses with correspondingly large solar collector surfaces can be
served by the F-Water Heater.
Primary side
The primary circuit is the heating
supply side of the unit. It consists of
a three-way motor valve, pump, air
vent, filling/emptying valve.
Secondary side
The secondary side is the domestic
hot water side of the unit. It consists
of a safety relief valve, check valve, filling/emptying valve.
VL.CW.M1.02 © Danfoss 10/2009
Options
Available options are additional ball
valves, strainer, balancing valve, charging pump and circulation pump.
Further options offered are gasketed
heat exchanger, double pumps and
insulation.
Control
The controller, the sensors and the total wiring is included in the delivery.
This ensures following function:
When the temperature in the top of
the domestic hot water cylinder is not
at the setpoint, the motor valve opens
and the charging pump switches on.
The temperature sensor on the primary flow secures a constant flow temperature to the heat exchanger. The
charging process continues until the
temperature sensor in the bottom of
the cylinder signals, that the setpoint
temperature has been achieved.
Construction
The F-Water Heater is built on a floor
standing, welded steel frame, and the
connections are in the top.
The pipes on the primary side are
black steel pipes, and on the secondary side stainless steel pipes are
used. Most connections are welded
and made by nuts and gaskets.
FEATURES & BENEFITS
• Domestic hot water module • A prefabricated unit secures a unique
quality
• Constant DHW temperature
• Insulated plate heat exchanger
• Capacity: 69-1250 kW
• Compact design
• Easy installation
• Minimized risk of lime scale and bacteria
formation
F-Water Heater
Circuit diagram - example
2
5
6
7
8
9
10
12
Plate heat exchanger
Strainer
Non-return valve
Ball valve
Primary pump, HE
Circulation pump, DHW
Charging pump, DHW
Safety valve, DHW 10 bar
13
18
25
27
28
33
34
47
50
25
Delivery limit
28
Option 1
HE
supply
Thermometer 0-120°C
Drain valve
Controller ECL300/C17
Surface sensor
Immersion sensor
Actuator 230V
3-port mixing valve
Balancing valve
Air vent
33
7
8
5
13
50
27
Option 2
7
28
34
DHW
28
2
12
HE
return
7
18
47
6
DCW
47
10 7
Circ.
Option 3
Technical parameters:
Nominal pressure:
Maximum temperature:
Brazing material (HEX):
PN 10
Tmax= 120 °C
Copper
1
3
Electrical supply:
230 / 400 V AC
2
4
Dimensions (mm):
FWH 69:
FWH 1250:
H 1410 x W 650 x D 230
H 1860 x W 1400 x D 450
DHW
capacity
kW
69
82
110
138
185
209
244
274
315
345
Connections sizes:
FWH 69 - FWH 138: DN25/DN25/DN25
FWH185:
DN32/DN25/DN25
FWH 209 - FWH 244: DN32/DN32/DN25
FWH 274 - FWH 315: DN40/DN32/DN25
FWH 345 - FWH 406: DN40/DN40/DN25
FWH 445 - FWH 464: DN50/DN40/DN25
FWH 522 - FWH 590: DN50/DN50/DN25
FWH 652 - FWH 684: DN65/DN50/DN32
FWH 800 - FWH 1000: DN65/DN65/DN32
FWH 1250:
DN80/DN65/DN40
Front view
5
Connections:
1 HE supply
2 HE return
3 DHW
4 DCW
5 Circ.
DHW: Capacity examples 10 °C/60 °C
FWH 69
FWH 82
FWH 110
FWH 138
FWH 185
FWH 209
FWH 244
FWH 274
FWH 315
FWH 345
10 7
18
6
Type
Supply flow
primary
°C
70
70
70
70
70
70
70
70
70
70
DHW
buffer tank
Further options:
• Double pump
• Insulation of pipes
• Gasketed heat exchanger
• External communication M-Bus
• Circulation
DHW: Capacity examples 10 °C/60 °C
Return flow
primary
°C
30
30
30
30
30
30
30
30
30
30
Flow rate
Secondary
l/h
1190
1410
1890
2370
3180
3590
4200
4710
5420
5930
Type
FWH 406
FWH 445
FWH 464
FWH 522
FWH 590
FWH 652
FWH 684
FWH 800
FWH 1000
FWH 1250
DHW
capacity
kW
406
445
464
522
590
652
684
800
1000
1250
Supply flow
primary
°C
70
70
70
70
70
70
70
70
70
70
Return flow
primary
°C
30
30
30
30
30
30
30
30
30
30
Flow rate
Secondary
l/h
6980
7650
7980
8980
10150
11210
11760
13760
17200
21500
* Pump excess pressure of 10 kPa primary and 15 kPa secondary
Danfoss A/S · DK-6430 Nordborg · Denmark · Tel.: +45 74 88 22 22 · Fax: +45 74 49 03 95
E-mail: heating@danfoss.com · www.dh.danfoss.com
VL.CW.M1.02 © Danfoss 10/2009
DKDHR