Operation; System; Heat Recovery Unit; Bypass And Heat Exchanger - J.E. StorkAir WHR 90 Mode D'emploi

3. Operation

3.1 The system
A typical balanced ventilation system consists of:
• Outdoor air(A) and removal of polluted air(B).
• A WHR heat recovery unit(C).
• Intake valves in the bedroom and living rooms(D).
• Exhaust valves in the kitchen, bathroom, toilet and storage area(E).
• Non-powered extractor hood with switch(F).
A B
C
D
E
E
3a.

3.2 Heat recovery unit

• External casing of coated plate(H).
• Interior of high quality polypropylene (EPP).
• 4 connections for air ducts(I).
• 2 EU3 filters for air purification(J).
• 2 energy-efficient DC motors with high efficiency wheel. (Not visible,
internal).
• Counterflow exchanger (heat exchanger) with over 95% thermal effi-
ciency (Not visible, internal).
• Operating panel with display for reading data and setting procedures
(K).
• Model plate(L).
• Condensation extractor(M).
• Sticker air connections(N).
• Perilex plug(O).
• WHR R model is for right-hand air connections to the house.
• WHR L model is for left-hand air connections to the house.
I
N
H
J
TYPE
AFVOERZ IJDE
K CODENU MMER VENTILA
FASE VOLTAGE TOR FILTER
CAPACIT EIT L - HERTZ TOEVOER
M - H 30% - 50% - Bescherm ingsklass ZIJDE
90% ( 100% ) e Isolatiekl asse VENTILA TOR
FILTER
AANSLU ITSCHEM
MAAND A
3b.
D
D
D
E
F
I
M
O
L

3.3 Bypass and heat exchanger

• Polluted air is extracted from the kitchen, toilet(s) and bathroom(s)(A).
• The heat exchanger(B) extracts heat from the extracted air.
• Fresh outdoor air is sucked in(C).
• The heat exchanger(B) warms the air.
• The fresh warmed air enters the living room and bedrooms(D).
• The HE counterflow heat exchanger(B) has high thermal efficiency so
that the intake air does not require heating.
• When the Bypass(E) (only available on model WHR B) is activated,
much of the extracted polluted air is conducted around the exchanger.
This enables refreshing the house with night air during the summer.
This
so-called "free cooling" is activated automatically according to a set
temperature.
A
D
3c. A-return air, B-Counterflow heat exchanger, C-Outdoor air, D-Intake air, E-Bypass control
and
F-Exhaust air
The balanced ventilation system contributes to energy efficiency, a healthy
indoor climate and an optimum living environment, and prevents moisture
problems.
An opening has purposely been left under inside doors, in order to
ensure effective and draught free air flow in the house. If these
openings are closed off, with door rubbers or thick carpets, the
air flow in the house will stagnate. The system will then no longer
function optimally. Opening windows and doors also has a negative
effect on optimal functioning of the system.
The intake and exhaust valves in the living room and bedrooms
and/or hall are properly set by the installer so that the air supply
and air exhaust are in balance. These settings must not be altered.
The WHR is protected against freezing of the counterflow exchang-
er. A temperature sensor has been fitted in the exhaust air for this
purpose. At too low a temperature, the speed of the intake fan is
electronically reduced, so that less heat is extracted from the
exhaust air and the risk of freezing is avoided.

3.4 Operation of bypass

The WHR can optionally be fitted with an automatic bypass. When the
bypass is opened, a large amount of the exhaust air is led through the
bypass and not through the counterflow exchanger. This allows for so-
called "free cooling" during night time hours in the summer months. After
all, the relatively cool outside air is not heated by the warmer indoor air.
The temperature at which the bypass becomes operational can be set by
the user. The WHR display has a 'Comfort temperature' key for this pur-
pose. The WHR will work to the temperature set.
29
E C
F
B