Alterra WZSV 63

Brine/water source heat pump

The Alterra WZSV 63 from Modutherm is a compact brine/water source indoor heat station intended for use within 5th generation heat networks, where an ambient loop is the source of energy, or for standalone properties where energy is sourced from a series of geothermal probes or ground collectors. The WZSV 63 can provide heating and comfort cooling, and the 178-litre storage cylinder can deliver domestic hot water for the whole family.

2

2 Year
Warranty*

SG

Smart Grid
Ready

Solar PV
Ready

The Alterra WZSV 63 provides the perfect solution for achieving high output within limited space constraints whilst being energy efficient. The inverter drive technology adapts output to match the property and its occupants, saving on electricity costs and energy. A low starting current also assists the network operator accordingly.

The attractive and modern appearance means the unit will not look out of place in a kitchen or other living area should a utility cupboard not be available. With internal parts accessible from the front of the appliance, the WZSV 63 can also be installed in tight spaces.

Compact dimensions

Despite the many integrated components, the dimensions of the Alterra WZSV 63 are very frugal, and the unit takes up less than half a square meter of floor space, making the WZSV ideal where space is at a premium, such as within city apartment buildings.

Easy controls

The Alterra WZSV 63 is equipped with an integrated/wall-mounted user interface. The unit is also manageable remotely via a smartphone app.

  • A+++ energy efficiency - low energy costs

  • COP up to 4.75

  • Heating, domestic hot water and comfort cooling all in one appliance

  • Space saving dimensions and flexible positioning

  • Integrated/wall-mounted user interface

  • Completely pre-assembled including 178-litre DHW cylinder

  • Up to 6kW of electrical elements for back up of heating and DHW

  • Ultra-quiet operation

  • Weather compensation of heating

  • 75°C maximum flow temperature

  • Up to 16 bar source working pressure (with optional plate kit)

  • Removable heat pump module box for ease of transportation and servicing

  • Heating and DHW available via elecytical immersion even when heat pump module box is removed

  • Top connections

  • Integration with photovoltaic systems, solar thermal and other technologies is possible

  • BMS compatible

  • Energy consumption meter

  • Optional kit for unvented DHW application

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Features in detail
Comfort cooling included

With the K models of Alterra WZSV 63, natural comfort cooling can be provided. Natural comfort cooling is a very cost-effective and environmentally friendly way of providing cooling as the compressor of the WZSV remains switched off during this time, which saves energy and lengthens the serviceable life of the appliance. Low-temperature brine/water, sourced from the ground or ambient loop, is passed through a heat exchanger within the unit and then onto fan coils or underfloor systems that will maintain the temperature within the room at a comfortable level.

When installed as a ground source appliance, natural cooling provided by the unit is especially beneficial, as comfort cooling is provided for virtually no cost.  

Luxtronic controller

The Alterra WZSV 63 features the Luxtronic ‘turn and tip’ controller, where desired temperatures and required settings can be stored to allow automatic regulation of the heat pump. The simple and user-friendly interface can be installed on the front of the appliance or mounted on a wall.

Connection to the USB port of the interface allows qualified personnel to apply software updates, log data or see historical fault codes. The integrated RJ45 port allows direct connection of the WZSV 63 to the internet for remote control.

What is a heat network?

A heat network – also called district heating – is a distribution system of insulated pipes that takes heat from a central source and delivers it to a number of domestic or non-domestic buildings.

Learn more

Technical Data

Models
HHeating / DHW
KHeating / DHW / Cooling
63H1/3M63K1/3M
Performance
Heating capacity
B0/W35
Min./Max.kW0.87 / 6.00
COP
B0/W35
4.66
SCOP (Seasonal Coefficient of Performance)
35/55°C
5.14 / 3.96
Cooling capacity
B10/W18
-4.1
CO₂ equivalent--
Energy efficiency
Heating operationA+++
Domestic hot water operationA
Operating limits
Heat source temperatureMin./Max.°C-13 / 30
Heating circuit flow tempMin./Max.°C20 / 75
Sound
Sound pressure level
at 1 metre distance
dB(A)32 / 39
Sound power leveldB(A)39 / 51
Sound power level
(DIN EN 12102-1)
dB(A)40
Heat source
Flow rate
Pipe sizing
l/h1450
Residual headbar0.800.65
Anti-freeze concentration: minimum frost protection down to°C-15
Source operating pressureMax.bar4.5
Source operating pressure
with optional plate kit
bar16
Circulation pump control rangeMin./Max.l/h200 / 2500
General
Total weight
Empty
kg223230
Tower weight
Empty
kg160
Heat pump module box weightkg6370
Refrigerant typeR290
Refrigerant volumekg0.165
Allowable refrigerant circuit operating pressureLow/High Press.MPa (g)3.73 / 1.37
Safety valve response pressurebar3
DHW tank
Net volumelitres178
Heat exchanger area2.14
DHW temperature
Heat pump operation
Max.°C65
DHW temperature
Electric element heating element
Max.°C65
Standing loss
ErP: 2009/125/EG (at 65°C)
W54
Mixed water quantity
according to ErP: 2009/125/EG
(at 40°C, draw-off of 10 l/min)
litres242
Allowable temperatureMax.°C95
PressureOperatingbar6
Max.bar10
Testbar13
Electrical
Electrical supplyV / Ph / Hz400 / 3 / 50
Electrical supply
Alternative
V / Ph / Hz230 / 1 / 50
Max power consumptionkW-
Starting currentA<5
Electrical element3 x 2kW
Source pump consumptionMin./Max.W5 / 873 / 140
Apartment pump consumptionMin./Max.W2 / 60
Performance (additional)
Heating capacity
B0/W35 (DIN EN 14511-x)
kW2.45
COP
B0/W35 (DIN EN 14511-x)
4.66
Heating capacity
B0/W45 (DIN EN 14511-x)
kW2.20
COP
B0/W45 (DIN EN 14511-x)
3.13
Heating capacity
B0/W55 (DIN EN 14511-x)
kW2.70
COP
B0/W45 (DIN EN 14511-x)
2.97
Heating capacity
B7/W35 (DIN EN 14511-x)
kW2.51
COP
B7/W35 (DIN EN 14511-x)
4.75
Heating capacity
B0/W35
Min./Max.kW0.87 / 6.00
Heating capacity
B0/W45
Min./Max.kW0.77 / 5.47
Heating capacity
B0/W55
Min./Max.kW0.60 / 5.08
Heating capacity
B7/W35
Min./Max.kW1.10 / 7.09