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Weishaupt
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WHI freshaqua 22 #2

Weishaupt WHI freshaqua 22 #1, WHI freshaqua 22 #3, WHI freshaqua 22 #2, WHI freshaqua 22 #4 Mounting And Operating Instructions

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Page 1
Mounting and operating instructions
Fresh water station WHI freshaqua 22
83514302 ▪ 1/2017-08
Page 2
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Installation and operating instructions Fresh water station WHI freshaqua 22
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1
Information for the user ........................................................................................ 4
1.1 User guidance ............................................................................................... 4
1.1.1 Symbols ........................................................................................................ 4
1.1.2 Target group ................................................................................................. 4
1.2 Warranty and liability..................................................................................... 4
2 Safety .................................................................................................................. 5
2.1 Designated use ............................................................................................. 5
2.2 Safety instructions ........................................................................................ 5
2.3 Safety measures ........................................................................................... 6
2.4 Electrical connection ..................................................................................... 6
2.5 Structural modifications ................................................................................. 6
2.6 Disposal ........................................................................................................ 6
3 Product description .............................................................................................. 7
3.1 Function ........................................................................................................ 8
3.2 Serial number ............................................................................................... 8
3.3 Technical Data Fresh Water Station ............................................................. 9
3.4 Technical Data Pumps ................................................................................ 11
3.5 PWM input signal (solar profile) .................................................................. 11
3.6 Hydraulilc performance data ....................................................................... 12
4 Dimensioning and Planning ............................................................................... 13
4.1 Dimensioning the storage ........................................................................... 15
4.2 Circulation mode ......................................................................................... 16
5 Installation ......................................................................................................... 17
5.1 Assembly .................................................................................................... 18
5.2 Connection .................................................................................................. 19
5.3 Controller connection .................................................................................. 19
6 Operation ........................................................................................................... 20
7 Commissioning .................................................................................................. 20
7.1 Filling the primary circuit ............................................................................. 21
7.2 Commissioning the controller ...................................................................... 22
7.3 Maximum tapped flow rate .......................................................................... 23
7.4 Setting the temperature .............................................................................. 25
8 Maintenance ...................................................................................................... 26
9 Spare parts ........................................................................................................ 27
9.1 Spare parts list WHI freshaqua 22 #1 (40900015012) and
WHI freshaqua 22 #3 (40900019012) ......................................................... 27
9.2 Spare parts list WHI freshaqua 22 #2 (40900015022) and
WHI freshaqua 22 #4 (40900019022) ......................................................... 29
10Commissioning log ............................................................................................ 31
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Installation and operating instructions Fresh water station WHI freshaqua 22
1 Information for the user
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1 Information for the user
These installation and operation instructions form part of the device and must be stored
at the place of use.
Carefully read these instructions before installation and commissioning.
1.1 User guidance
1.1.1 Symbols
DANGER
Immediate danger of high risk. Non-observance will result in serious injuries or death.
WARNING
Danger of medium risk. Non-observance may result in environmental damage, serious injuries or death.
CAUTION
Danger of low risk. Non-observance may result in property damage or slight to moderate injuries.
NOTICE Important information.
1.1.2 Target group
This installation and operation manual is addressed to operators and qualified skilled
personnel. It must be observed by anyone working on the machine.
Work on the machine may only be performed by persons that have received the required training or instruction.
Persons with restricted physical, sensory or mental abilities may work on the machine if supervised or instructed by an authorised person.
Children may not play with the machine.
1.2 Warranty and liability
Warranty and liability claims for personal and material damage are void if they are due to
one or several of the following causes: Use of the machine contrary to its designated use, Non-observance of the installation and operation instructions, Operation of the machine with non-operational safety or protective devices, Continued use despite the presence of a defect, Improper assembly, commissioning, operation and maintenance of the machine, Unauthorised modification of the machine, Installation of additional components that were not tested together with the machine, Repairs carried out incorrectly, Failure to use Weishaupt original parts Defects in the supply lines, Force majeure.
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Installation and operating instructions Fresh water station WHI freshaqua 22
2 Safety
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2 Safety
2.1 Designated use
The fresh water station must only be installed in heating systems between the buffer tank
and the domestic water circuit. Due to its construction, it must only be installed and operated in a vertical position. The technical limit values specified in this instruction must be considered.
Use only original accessories in connection with the fresh water station.
Using the station contrary to its designated use will invalidate all liability claims.
The wrapping materials are made of recyclable materials that can be recycled by standard recycling operations.
2.2 Safety instructions
The following must be observed during installation and commissioning:
Relevant local and national regulations Accident prevention regulations of the employers' liability insurance association Instructions and safety instructions mentioned in these instructions
WARNING
Risk of scalding from hot water!
Due to the third party circulation, up to 90 °C hot water may run out at the tapping point in the primary circuit.
No external pump may be installed between the fresh
water station and the buffer tank.
The fresh water station must not be connected to a
heating circuit distributor.
CAUTION
Risk of burns!
The valves and fittings and the pumps can become heated up to more than 95 °C during operation.
The insulation must remain closed during operation.
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Installation and operating instructions Fresh water station WHI freshaqua 22
2 Safety
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NOTICE Material damage due to mineral oils!
Mineral oil products cause permanent damage in the material, resulting in its sealing characteristics getting lost. We cannot be held liable for damage caused by seals damaged in this way, and nor will we give warranty replacement for such parts.
It is imperative to prevent the EPDM from making contact
with substances containing mineral oils.
Use a silicone- or polyalkylene-based lubricant free of
mineral oil such as Unisilikon L250L and Syntheso Glep 1 from Klüber or a silicone spray.
NOTICE Malfunction!
The fresh water station must be integrated in the
potential equalisation of the electrical installation. If this is not ensured by the connected pipework than establish a correct potential equalisation connection to the main potential connection.
2.3 Safety measures
Immediately eliminate safety-relevant defects and replace safety-relevant components
when they have reached the end of their service life due to their construction.
2.4 Electrical connection
When performing any work on live parts:
Observe the accident prevention regulations BGV A3 and local regulations, Use tools according to EN 60900.
2.5 Structural modifications
Conversion measures are only allowed after prior approval in writing by the
Max Weishaupt GmbH. Additional components may only be installed if they were tested together with the machine. Use only Weishaupt original parts.
2.6 Disposal
Dispose of the materials used properly and in an environmentally compatible manner.
In doing so, observe local regulations.
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Installation and operating instructions Fresh water station WHI freshaqua 22
3 Product description
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3 Product description
The fresh water station is a pre-assembled fitting group tested for leaks for transferring
heat between the buffer tank and the domestic water circuit. It contains a preset controller as well as important fittings for operating the system:
Ball valves in the primary circuit Piston valves in the secondary circuit Safety valve in the secondary circuit Pre-assembled controller Temperature sensor on the cold water supply Temperature sensor on the heating supply Flow meter on the warm domestic water outlet Lockable primary pump Fill and drain valve for venting the heat exchanger and the pump
Connections
1 Secondary side: hot water outlet
2 Primary side: supply from buffer tank
3 Primary side: return to buffer tank
4 Secondary side: cold water inlet
Equipment
A Piston valve (warm water outlet)
B Fill and drain valve
C Safety valve, 10 bars
(Only for protection of the station. Does not replace the safety valve that must be installed on-site.)
D Temperature sensor PT1000, rapid
E Primary pump
F Ball valve
G Ball valve with check valve
H Analogue flow rate temperature sensor VFS 2-40 l/min
J Heat exchanger
K Temperature sensor PT1000, rapid
L Piston valve (cold water inlet)
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3.1 Function
The fresh water stations WHI freshaqua are used for the comfortable and hygienic
heating of domestic water according to the continuous flow heater principle. Other than in conventional domestic water storage tanks, the foodstuff water is not used for energy storage and stored as hot water for hours or days. It is only heated when required using a high-performance plate heat exchanger. The energy for heating the domestic water comes from a buffer tank that can be heated by different systems - by solar systems as well as by solid fuel boilers, oil / gas boilers, heat pumps or other systems.
The WHI freshaqua modules are well suited for use in combination with a thermal solar system. The very good cooling of the heating water in the highly effective plate heat exchangers leads to an increased efficiency of the solar circuit as the average temperature of the solar circuit can be reduced due to the cold return.
In the event of great tapping differences, the WHI freshaqua fresh water stations always have to guarantee a constant outlet temperature at the hot water tap. The speed of the highly efficient EC pumps of the latest generation is controlled by a high-performance closed-loop control always allowing the heating flow rate to be optimal­ly set to the current tap capacity.
The closed-loop control receives the necessary information for adjusting the system from a flow rate sensor and extremely fast temperature sensors that detect the smallest temperature deviations immediately.
The WHI freshaqua can also be equipped with a highly efficient EC circulation pump as an option. The closed-loop control can operate the pump in different circulation modes; always adapted to the current system and requirements of the customer.
During commissioning, the circulation return temperature can be set individually on the circulation system so that the recordable and traceable DVGW (551) requirements for a maximum cooling of the circulation by 5 K can be fulfilled.
Thus, the WHI freshaqua offer perfect comfort, optimum hygiene and a future-orientated energy saving operation.
3.2 Serial number
The serial number on the type plate clearly identifies each product. The serial number is
necessary for the Weishaupt after-sales service. In case of a complaint, please send us the serial number of the product concerned and the completed commissioning report (see page 31). The serial number is placed in the upper right corner of the support sheet of the station.
Serial number:
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Installation and operating instructions Fresh water station WHI freshaqua 22
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3.3 Technical Data Fresh Water Station
Dimensions WHI freshaqua 22 #1 and #3 WHI freshaqua 22 #2 and #4
Total height 645 mm 1116 mm
Total width 355 mm 446 mm
Total depth 249 mm
Centre distance, top 86 mm
Centre distance, bottom 47 mm
Primary pipe connection (storage tank circuit)
G ¾" female thread
Secondary pipe connection (WHI freshaqua)
G ¾" male thread, flat sealing
Safety valve outlet G ¾" female thread
Operating data
Max. admissible pressure primary: 6 bars, secondary: 10 bars
Min. flow rate 2 l/min
Operating temperature 2 – 95°C
Max. power Q
max
80 kW at Flow
prim.
75° / DHW
sec.
60° / DCW
sec.
10°
Flow rate at Q
max
primary: 1400 l/h, secondary: 22 l/min
Operating temperature sensors -25 °C to +120 °C
Equipment
Safety valve secondary: 10 bars, suitable for domestic water
Primary pump High-efficiency pump with PWM control, 3-70 W
Secondary pump —
High-efficiency pump
with PWM control, 3-70 W
Heat exchanger 30 plates
Flow rate sensor secondary: 1 x VFS, Measuring range: 2-40 l/min
Temperature sensor primary / secondary: 1 x PT1000 each, rapid
Check valve (in the ball valve) primary: 1 x 200 mm wc, can be opened
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Material
Valves and fittings Brass
Seals: o-ring EPDM
Flat sealing AFM 34, free of asbestos
Check valve Hostaform
Pipes 1.4401 (AISI 316)
Insulation EPP, = 0.041 W/(m K), fire class B2
Heat exchanger with copper soldering (WHI freshaqua 22 #1 and #2)
Plates + connecting pieces: 1.4401 (AISI 316)
Solder: 99.99% pure copper
Heat exchanger with nickel soldering (WHI freshaqua 22 #3 and #4)
Plates + connecting pieces: 1.4401 (AISI 316)
Solder: 99.99% nickel
Admissible medium (WHI freshaqua 22 #1 and #2)
primary: heating water according to VDI 2035 / Ö-Norm H 5195-1
secondary: domestic water with a max. chloride content: ≤ 80 ppm
Admissible medium (WHI freshaqua 22 #3 and #4)
primary: heating water according to VDI 2035 / Ö-Norm H 5195-1
secondary: domestic water with a max. chloride content: ≤ 300 ppm
Certification SVGW (1308-6180)
ACS (15 ACC NY 015)
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3.4 Technical Data Pumps
Grundfos UPM2 15-75 LowFlow Grundfos UPM2 15-75 CIL
Length 130 mm
Connections 1" male thread
Protection class IP 44
Max. pressure 1.0 MPa (= 10 bars)
Max. temperature 95 °C TF 95
I (1/1) 0.04-0.52 A
P1 3-70 W
Use in
WHI freshaqua 22 #1 and #3 Prim /
WHI freshaqua 22 #2 and #4 Prim Sec
Prim = Primary side (accumulator circuit) / Sec = Secondary side (circulation)
3.5 PWM input signal (solar profile)
PWM input signal [%]
Pump status
< 6 Standby
6-8 Hysteresis
9-15 Min.
speed
16-90 Linear increase in
speed from rpm min. to rpm max.
91-100 Max.
speed
Min.
Max
.
Stop
PWM input signal [%]
Speed
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Installation and operating instructions Fresh water station WHI freshaqua 22
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3.6 Hydraulilc performance data
WHI freshaqua 22
Flowrate[l/h]
Pressuredropdomesticwaterside
Residualdeliverypressureorpressuredrop[mbars]
CirculationUPM215‐75CIL
HeatingUPM215‐75LowFlow
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Installation and operating instructions Fresh water station WHI freshaqua 22
4 Dimensioning and Planning
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4 Dimensioning and Planning
The WHI freshaqua is a fresh water station that heats the domestic water according to
the continuous flow heater principle.
The system must fulfil certain requirements for the trouble-free function of the fresh water station. Take a little time for the planning before assembly.
Due to their construction, the WHI freshaqua modules reduce the precipitation of scale in the heat exchanger. For systems with a high total domestic water hardness and/or high temperatures, a water treatment is recommended, in order to prevent scale formation.
WARNING
Risk of scalding from hot water!
Due to the third party circulation, up to 90 °C hot water may run out at the tapping point in the primary circuit.
No external pump may be installed between the fresh
water station and the buffer tank.
The fresh water station must not be connected to a
heating circuit distributor.
The WHI freshaqua stations in the following table differ in the soldering material used for
the plate heat exchangers.
The choice of the heat exchanger depends on the requirements of the installation
location. Depending on the chemical composition of the water on the installation location, an appropriate plate heat exchanger must be chosen. Please observe the following table:
Heat exchanger
with copper soldering
Heat exchanger
with nickel soldering
Maximum chloride content
in the potable water
≤ 80 ppm ≤ 300 ppm
pH value 7.0 - 9.0 No limitation
Conductivity ≤ 500 μS/cm No limitation
Zinc-galvanised piping Unsuitable Suitable
Maximum pressure at 95 °C 17 bars 12 bars
Plate material 1.4401 (AISI 316)
Overview of the WHI freshaqua stations and the integrated heat exchangers:
Fresh water station -w- Part number Soldering material
of the heat exchanger
WHI freshaqua 22 #1 40900015012 Copper
WHI freshaqua 22 #2 40900015022 Copper
WHI freshaqua 22 #3 40900019012 Nickel
WHI freshaqua 22 #4 40900019022 Nickel
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Installation and operating instructions Fresh water station WHI freshaqua 22
4 Dimensioning and Planning
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Assembly example
Fresh water station WHI feshaqua 22 #2 with circulation kit and with optional
return distribution
In order to guarantee optimum closed-loop control, where possible no hydraulic pressure
drop should occur on the primary side (e.g., from the installation of a mud strainer, dirt trap or mixing valve).
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Installation and operating instructions Fresh water station WHI freshaqua 22
4 Dimensioning and Planning
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4.1 Dimensioning the storage
Using the following table, you can calculate the approximate required volume of the
buffer tank.
Temperature in the
buffer tank
Hot water temperature
set on the controller
Required storage volume
per litre of hot water
50 °C 45 °C 1.5 litres
45 °C 0.9 litres
60 °C 50 °C 1.2 litres
55 °C 1.6 litres
45 °C 0.7 litres
70 °C 50 °C 0.9 litres
55 °C 1.0 litres
45 °C 0.6 litres
80 °C 50 °C 0.7 litres
55 °C 0.8 litres
Calculation example for dimensioning the buffer tank:
Buffer tank temperature: 60 °C
Required tapped flow rate at the tap: 20 l/min
Domestic hot water temperature set on the controller: 45 °C
How large does the tank have to be if tapping is carried out for 20 minutes without reheating?
20 l/min x 20 min = 400 l
400 l x 0.9 = 360 l
The heated part of the buffer tank must have a volume of 360 litres.
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Installation and operating instructions Fresh water station WHI freshaqua 22
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4.2 Circulation mode
The fresh water station WHI freshaqua 22 #2 and #4 is equipped with a circulation pump.
Three possible operating modes are stored in the controller for operating the circulation pump (see also operating instructions of controller, menu "Func" / "F02"):
Pulse controlled operation (requirement dependent / demand):
The circulation pump is started by briefly opening a hot water tap point (tapping pulse:
~2 seconds). The circulation pump then only runs for a few minutes (can be set). Time-dependent operation:
The operation of the circulation pump can be set on a week clock within a freely
definable time period. With this operating mode, the circulation is started at the beginning of the set time period. The circulation is switched off after the set time period has elapsed.
Temperature-dependent operation:
With this operating mode, the circulation is only started if the minimum temperature that
can be set on the circulation temperature sensor is not exceeded within the operating period. The circulation is switched off after reaching the nominal temperature that can be set or after the set time period has elapsed.
The operating modes can be combined as desired, e.g., time and temperature-
dependent operation. In doing so, the circulation is only active if the temperature on the circulation temperature sensor has exceeded and the time window is active.
Outside the time window, the circulation pump can also be activated via a tapping mode when the additional pulse controlled operation is activated.
NOTICE Damage to property!
In its delivery state, the circulation is not activated yet (see operating instructions of the controller, menu "Func" / "F02" to "OFF"). If the circulation line is installed, the operating mode must be selected and pre-set under all circumstances. The revolution speed of the circulation pump must be specified via the PWM signal (factory setting: 40%).
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Installation and operating instructions Fresh water station WHI freshaqua 22
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5 Installation
The domestic water connection must be carried out according to the relevant standards (e.g., DIN 1988)!
NOTICE Material damage!
The safety valve integrated into the station does not
replace the safety equipment of the domestic water connection according to DIN 1988.
The safety valve merely protects the station from excess
pressures when maintenance is required.
Fresh water
station
Service water fitting
Drain valve
Safety valve
Non-return valve
Pressure-reducing valve, if necessary
Test valve
Shut-off valve
Hot water
Cold water
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Installation and operating instructions Fresh water station WHI freshaqua 22
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5.1 Assembly
WARNING
Risk to life and limb due to electric shock!
Prior to performing electrical work on the controller,
de-energise the system.
For more information, see enclosed installation and operation instructions of the station controller.
Connect the fresh water station to the power supply
system (230 V, 50 Hz) only after completing all installation tasks, filling and flushing. This avoids an unintentional start of the motors.
NOTICE Material damage!
In order to avoid damaging the system, the installation
site must be dry, structurally safe and frost-free.
Furthermore, access to the closed-loop control and
safety equipment must be guaranteed at all times during operation!
If tapping points are connected to the same network
as the fresh water station, in which pressure surges are possible (e.g., flushing valves, washing machines or dishwashers), we recommend the installation of water hammer dampers near the device causing the pressure surges.
1. Place the installation site of the fresh water station near the buffer
tank. With long connecting lines, the transfer capacity is reduced due to higher pressure drops.
2. Transfer the dimensions for the drill holes onto the wall. A suitable
drilling pattern can be found on the carrying aid below the fresh water station.
3. Drill the holes and insert the enclosed wall plugs. Make sure that the
ground has sufficient load-carrying capacity.
4. Screw the screw into the plug until it protrudes about 40 mm from the
wall.
5. Pull off the front shell.
6. Hang the fresh water station on the screws.
Tighten the screws so that the insulation on the sides rest against the wall.
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Installation and operating instructions Fresh water station WHI freshaqua 22
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5.2 Connection
Pipe the fresh water module with the system according to the diagram below.
Pipe gap from the wall (secondary) = 107 mm
1 Secondary side:
hot water outlet connection ¾" male thread, flat sealing
2 Primary side:
supply from buffer tank, ¾" female thread, piping minimum DN 20, 22 x 1 mm, recommended DN 25, 28 x 1.5 mm
3 Primary side:
return to buffer tank, ¾" female thread, piping minimum DN 20, 22 x 1 mm, recommended DN 25, 28 x 1.5 mm
4 Secondary side:
cold water inlet connection ¾" male thread, flat sealing
Pipe gap from the wall (primary) = 67 mm
5.3 Controller connection
WARNING
Risk to life and limb due to electric shock!
Prior to performing electrical work on the controller,
de-energise the system.
For more information, see enclosed installation and operation instructions of the station controller.
Connect the fresh water station to the power supply
system (230 V, 50 Hz) only after completing all installation work, filling and flushing. This avoids an unintentional start of the motors.
The plug-in pump lines are permanently supplied with a
mains voltage of 230 V and cannot be switched off via the controller.
The fresh water station is pre-wired in the factory. When using the circulation pump, its connection can be obtained from the enclosed assembly instructions.
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Installation and operating instructions Fresh water station WHI freshaqua 22
7 Commissioning
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6 Operation
A detailed description of the operation of the controller can be found in the enclosed
controller manual.
7 Commissioning
Observe the following safety instructions regarding the commissioning of the station:
NOTICE Note!
Open the valves in the lines and in the module slowly in order to avoid pressure surges.
Check valve operation
The primary circuit is equipped with a gravity brake in ball valve (G) in order to prevent undesired gravity circulation.
The gravity brake must be opened for venting and flushing the system. For this purpose, turn the ball valve to position 45°. The gravity brake is not in operation.
All ball valves and valves must be opened completely for operating the system (position 0°).
Ball valve with integrated check valve
(Normal direction of flow in the picture: downstream)
0° 45° 90°
Check valve in operation,
flow in flow direction only.
Check valve not in operation, flow in both directions.
Ball valve closed, no flow.
To actuate the ball valve, a handle is included in the delivery.
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7.1 Filling the primary circuit
WARNING
Risk of scalding from hot water!
The system is under pressure. By opening the fill and drain valve lever on the fill and drain valve, up to 90°C hot water may run out that could lead to personal injuries.
Open the fill and drain valve slowly and
with sufficient distance.
With (partially) filled tank
1. Open ball valve (F) slowly by turning it to the 0° position.
2. Fill the tank with the filling fitting installed on-site until an operating pressure of
approx. 1.5 bars* is reached. Use heating water according to VDI 2035 / Ö-Norm H 5195-1.
3. Attach a hose to fill and drain valve (B). Actuate fill and drain valve (B) carefully
and allow the air to escape.
4. Close fill and drain valve (B).
5. Close ball valve (F) by turning it to the 90° position.
6. Open ball valve (G) slowly by turning it to the 45° position.
7. Actuate fill and drain valve (B) carefully and allow the air to escape.
8. Close fill and drain valve (B).
9. After venting, check the operating pressure of the tank and where applicable,
increase the pressure.
10. Open ball valves (F) and (G) completely by turning it to the 0° position.
*1.5 bars in the primary circuit = recommended minimum value
Decisive factors for the pressure are also the design-related system pressures and the heating system components!
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7.2 Commissioning the controller
WARNING
Risk to life and limb due to electric shock!
Check whether the sensors and pumps have been
connected to the controller and the controller housing is closed. Do not apply voltage to the controller before that.
1. Slowly open the piston valve on the secondary side (A and L).
2. Ensure for the correct integration of the fresh water station in the potential
equalisation of the system.
3. Connect the fresh water station to the power supply system (230 V, 50 Hz).
4. Remove the front panel of the controller (see controller instructions, page 5).
5. In the selection menu of the controller, select manual mode ("H1").
Switch on the PWM signal of the pump ("100 %").
6. Allow the pump to run for a few minutes in order to vent the fresh water station.
7. If you can still hear air noises after that, attach a hose to fill and drain valve (B).
A
ctuate fill and drain valve (B) carefully when the pump is still running and allow
the air to escape.
8. If you cannot hear any air noises anymore, turn off the pump.
For this purpose, select manual mode ("H1") in the selection menu of the controller.
9. Set the pump to automatic mode ("A").
10. Open the warm domestic water tapping point (e.g., tap) with a flow rate of
minimum 10 l/min and allow the water to run for approx. 2 minutes in order to vent the secondary circuit. Then close all tapping points in the secondary circuit.
11. Check the station for leaks.
12. Set the desired warm domestic water temperature on the controller
(see page 25).
13. The fresh water station is ready for operation.
14. The station controller "learns" the system-specific control parameters during
longer tapping operations. This "learning process" is continuously translated into practice. To achieve immediately optimum comfort, once commissioning is complete, water should be tapped on a few different service water fittings for about 30 s.
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7.3 Maximum tapped flow rate
The following diagram shows the maximum tapped flow rate depending on the tank
temperature with a pre-set hot water temperature of 45 °C at the tap point. The integrated closed-loop control prevents the temperature from dropping as long as the maximum flow rate is not exceeded.
Tapped flow rate [l/min]
Power [kW]
Hot water temperature: 45 °C Buffer tank temperature
Boundary conditions: Cold water temperature: 10 °C
Max. pressure drop on the domestic water side of the WHI freshaqua: 1000 mbars
The correlation between the individual variables hot water temperature, tapped flow rate
and buffer tank temperature is explained and shown on the basis of the following examples, such as which effect they have on the transmission power of the fresh water station.
Example 1
Hot water temperature at the tapping point: 45 °C
Temperature in the buffer tank: 50 °C
WHI freshaqua: maximum tapped flow rate: 18 l/min, transmission power: 44 kW
Example 2
Hot water temperature at the tapping point: 45 °C
Maximum tapped flow rate: 25 l/min
WHI freshaqua: temperature in the buffer tank: ~55 °C, transmission power: 60 kW
WHI freshaqua 22
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The following diagram shows the maximum tapped flow rate at a hot water temperature
of 45 °C at the tap point after adding 10 °C cold water.
The hot water temperature set at the controller is 60 °C.
Tapped flow rate [l/min]
Power [kW]
Hot water temperature: 45 °C, after heating to 60 °C and adding cold water (10 °C)
Buffer tank temperature
Boundary conditions: Cold water temperature: 10 °C
Example 1
Hot water temperature on the controller: 60 °C
Temperature in the buffer tank: 70 °C
WHI freshaqua: maximum tapped flow rate: 31 l/min, transmission power: 74 kW
Example 2
Hot water temperature on the controller: 60 °C
Maximum tapped flow rate: 25 l/min
WHI freshaqua: temperature in the buffer tank: ~65 °C, transmission power: 60 kW
WHI freshaqua 22
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Installation and operating instructions Fresh water station WHI freshaqua 22
7 Commissioning
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7.4 Setting the temperature
The desired (maximum) domestic hot water temperature is set on the controller under
"Para" (see controller manual, page 24).
WARNING
Risk of scalding from hot water!
In order to prevent scalding at the tap, the maximum hot
water temperature should not exceed 60 °C.
Tip for convenient optimisation: at high buffer temperatures (e.g., solar operation), the
hot water temperature should be set as high as possible (max. 60 °C).
Primary side
The temperature in the buffer tank required on the primary side depends on the hot water temperature as well as the tapping quantity required. The temperature in the buffer tank must be at least 5 K above the desired hot water temperature.
Secondary side
The possible tapped flow rate [l/min] at the tap depends on the water temperature set on the controller and the temperature available in the tank.
The recommended maximum domestic water flow rate through the fresh water station is ~38 l/min.
System-related large changes in the domestic water flow rate result in variations of the hot water outlet temperature. However, these variations are usually smoothed by the pipework in the building or by admixing water at the service water fittings.
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Installation and operating instructions Fresh water station WHI freshaqua 22
8 Maintenance
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26-32
The following table shows the relation between the tank temperature and the corre­sponding maximum tapped flow rate at 45 °C on the fitting (e.g., single-lever mixer). If the hot water temperature set on the controller is more than 45 °C, the tapped flow rate here comprises a mixture of hot and cold water together.
The transmission power specified for this is required to heat the water quantity of the tapped flow rate [l/min] from 10 °C to 45 °C.
Temperature in the
buffer tank
Hot water temperature
set on the controller
Max. flow rate from the
WHI freshaqua with
the set hot water
temperature
Max. tapped flow rate
at the tap for 45°C hot
water temperature
Transmission power
of the WHI freshaqua
WHI freshaqua WHI freshaqua WHI freshaqua
50 °C 45 °C 18 l/min 18 l/min 44 kW
60 °C
45 °C 30 l/min 30 l/min 73 kW
50 °C 23 l/min 27 l/min 64 kW
55 °C 17 l/min 22 l/min 52 kW
70 °C
45 °C 38 l/min* 38 l/min 92 kW
50 °C 33 l/min 37 l/min 91 kW
55 °C 27 l/min 34 l/min 84 kW
60 °C 22 l/min 31 l/min 74 kW
80 °C
45 °C 38 l/min* 38 l/min 92 kW
50 °C 38 l/min* 43 l/min 105 kW
55 °C 35 l/min 45 l/min 109 kW
60 °C 30 l/min 42 l/min 102 kW
at a cold water temperature of 10 °C, reheating not taken into account
*maximum flow rate: 38 l/min, with pressure drop of the WHI freshaqua of 1000 mbars (higher values hydraulically only possible to a limited extent, measuring limit of the flow rate sensor ~42 l/min)
8 Maintenance
The WHI freshaqua modules are low in maintenance. However, as part of the annual
inspection of the domestic water system, the following items should be checked/observed:
Check all connections for leaks Check the safety equipment Perform a functional check and check the setting parameters Plausibility check of the control parameters and nominal values Check the heat exchanger for dirt and functioning
We recommend concluding a maintenance agreement.
Page 27
Installation and operating instructions Fresh water station WHI freshaqua 22
9 Spare parts
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27-32
9 Spare parts
9.1 Spare parts list WHI freshaqua 22 #1 (40900015012) and
WHI freshaqua 22 #3 (40900019012)
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Installation and operating instructions Fresh water station WHI freshaqua 22
9 Spare parts
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28-32
Position number Spare part Part number
1
Plate heat exchanger Swep IC15H/30 (for WHI freshaqua 22 #1) 40900015047
Plate heat exchanger Swep B15TH/30-1P Ni (for WHI freshaqua 22 #3) 40900019087
2 Safety valve ½", 10 bars 40900015057
3 Piston valve DN 15 G¾A with drain 40900015062
4 Inlet and outlet valve G ⅜ 40900015077
5 Volume flow sensor analogue type VFS 2-40 l/min 40900015082
6 Temperature sensor PT1000-B G¼A 40900015117
7 Circulation pump UPM2 15-75 LowFlow 40900019362
8 Seal 17 x 24 x 2 (¾") AFM34/2 40900021107
9 Seal 21 x 30 x 2 (1") AFM34/2 40900021117
10 Seal 27 x 38 x 2 (1¼") AFM34/2 40900021137
11 Domestic water controller FC3.8 660346
12
Name plate WHI freshaqua 22 #1 40900015157
Name plate WHI freshaqua 22 #3 40900019017
Not shown in drawing
Thermo handle -weishaupt- 48002003132
Plug fuse connection cable PWM 48002002627
Plug cable for VFS sensor 650 mm 40900015137
Plug cable GND earthing for VFS sensor 450 mm 40900015147
Connection cable PWM 2500 mm long 48002002617
Pump cable 3 x 0.75 2500 mm long 48002002607
Plug cable temperature sensor 2500 mm 40900015037
Cap for inlet and outlet valve 48002002677
Outlet valve with O ring G¼A 40900015097
Closing plug with O ring G¼A 40900015107
Hose clamp with nut ¾" 40900015867
Drain hose G¾ x 1000 with o-ring 51150202422
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Installation and operating instructions Fresh water station WHI freshaqua 22
9 Spare parts
83514302 ▪ 1/2017-08 ▪ Ext. PAW
29-32
9.2 Spare parts list WHI freshaqua 22 #2 (40900015022) and
WHI freshaqua 22 #4 (40900019022)
Page 30
Installation and operating instructions Fresh water station WHI freshaqua 22
9 Spare parts
83514302 ▪ 1/2017-08 ▪ Ext. PAW
30-32
Position number Spare part Part number
1
Plate heat exchanger Swep IC15H/30 (for WHI freshaqua 22 #2) 40900015047
Plate heat exchanger Swep B15TH/30-1P Ni (for WHI freshaqua 22 #4) 40900019087
2 Safety valve ½",10 bars 40900015057
3 Piston valve DN 15 G¾A with drain 40900015062
4 Inlet and outlet valve G ⅜ 40900015077
5 Volume flow sensor analogue type VFS 2-40 l/min 40900015082
6 Temperature sensor PT1000-B G¼A 40900015117
7 Circulation pump UPM2 15-75 LowFlow 40900019362
8 Seal 17 x 24 x 2 (¾") AFM34/2 40900021107
9 Seal 21 x 30 x 2 (1") AFM34/2 40900021117
10 Seal 27 x 38 x 2 (1¼") AFM34/2 40900021137
11 Domestic water controller FC3.8 660346
12
Name plate WHI freshaqua 22 #2 40900015197
Name plate WHI freshaqua 22 #4 40900019027
13 Name plate WHI freshaqua 22 40900015187
14 Circulation pump UPM2 15-75 CIL 40900019342
Not shown in drawing
Non-return valve DN 15 G¾Fl x G¾A with drain 40900015177
Seal 21 x 30 x 2 (1") EPDM 90 40900015167
Thermo handle -weishaupt- 48002003132
Plug fuse connection cable PWM 48002002627
Plug cable for VFS sensor 650 mm 40900015137
Plug cable GND earthing for VFS sensor 450 mm 40900015147
Connection cable PWM 2500 mm long 48002002617
Pump cable 3 x 0.75 2500 mm long 48002002607
Plug cable temperature sensor 2500 mm 40900015037
Cap for inlet and outlet valve 48002002677
Outlet valve with O ring G¼A 40900015097
Closing plug with O ring G¼A 40900015107
Hose clamp with nut ¾" 40900015867
Drain hose G¾ x 1000 with o-ring 51150202422
Page 31
Installation and operating instructions Fresh water station WHI freshaqua 22
10 Commissioning log
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31-32
10 Commissioning log
System operator
System site
Serial numbers:
WHI freshaqua 22
Flow rate sensor
Controller
Software version
Primary pipeline
⌀ =
mm l = m
Secondary pipeline
⌀ =
mm l = m
Other installations  Circulation set Revolution speed of circulation pump:
 Return distribution set
 Miscellaneous:
Have both circuits been correctly flushed and vented? (No air sounds in the pump)
Vented
Are all shut-off valves and fittings in the cold water line open? Open
Is there a minimum pressure of 1.5 bars available on the primary side? Checked
Is there a minimum pressure of 2.5 bars available on the secondary side? Checked
Is a fault message shown on the display? No message
Installation company Date, Signature
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32-32
Max Weishaupt GmbH ▪·88475 Schwendi
Weishaupt close by? Addresses, telephone numbers etc. can be found at www.weishaupt.de
We reserve the right to make changes. All rights reserved.
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