Dantherm HRV 501 User manual

HRV 501
Service manual
Rev. 1.4
en •da •de

2
Der tages forbehold for trykfejl og ændringer
Dantherm can accept no responsibility for possible errors and changes
Irrtümer und Änderungen vorbehalten
Dantherm n’assume aucune responsabilité pour erreurs et modifications éventuelles

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070995 • Version 1.4 • 12.07.2019
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Introduction
Overview
Introduction
This is the service manual for the Dantherm Air Handling A/S home ventilation unit type
HRV 501 – type 352460
Manual, part no.
Part number of this service manual is 070995
Target group
The target group for this service manual are:
•The daily users
•Technicians who install and maintain the unit
Copyright
Copying of this service manual, or part of it, is forbidden without prior written permis-
sion from Dantherm Air Handling A/S.
Reservations
Dantherm Air Handling A/S reserves the right to make changes and improvements to
the product and the service manual at any time without prior notice or obligation.
Continued overleaf

2
Overview, continued
Table of contents
This manual covers the following topics:
Introduction
................................................................................................................1
Overview..............................................................................................................1
Product description
.....................................................................................................3
Overview..............................................................................................................3
Overall description...............................................................................................4
Components description ......................................................................................5
Electronic control.................................................................................................7
Air flow and filters ...............................................................................................9
Ventilation functionality .....................................................................................10
Installation and initial setup ...............................................................................12
User’s guide
.............................................................................................................15
Main functions...................................................................................................16
Set the time .......................................................................................................17
Adjusting temperatures......................................................................................18
Fire place...........................................................................................................19
Calibrate fan speed ............................................................................................20
Filter alarm timer ...............................................................................................21
Week programmes .............................................................................................22
Service menu .....................................................................................................25
Service guide
............................................................................................................27
Overview............................................................................................................27
Preventive maintenance......................................................................................28
Replace filters and reset filter alarm ...................................................................30
Accessories........................................................................................................32
Spare part list ....................................................................................................34
Fault finding guide.............................................................................................35
Technical information
...............................................................................................37
Overview............................................................................................................37
Technical data ...................................................................................................38
Dimensions........................................................................................................40
Wiring diagram ..................................................................................................41
Appendix B – Start up and running information ..................................................43
Index.................................................................................................................44

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Product description
Overview
Introduction
This section describes the HRV 501 unit, and its functionality
Content
This section covers the following topics:
Overall description
..................................................................................................... 4
Components description
............................................................................................ 5
Electronic control
....................................................................................................... 7
Air flow and filters
..................................................................................................... 9
Ventilation
.............................................................................................................. 10
Installation and initial setup..................................................................................... 12

4
Overall description
Introduction
This section gives you a description of the overall unit.
HRV 501 overview
HRV 501 ventilation unit, supply fresh air to residential home, and exchanging heat
from outgoing air to incoming air, resulting in
very low energy loss.
HRV 501 is designed to be wall mounted in dry surroundings and >10°C. e.g. utility
room or similar heated rooms.
Illustration, inter-
nal
Fig. 1
Parts overview
No.
Part
No.
Part
1
Antenna module
6
Supply air fan
2
Safety switch
7
Filter (F7)
3
Control board
8
Heat exchanger
4
Electric heating element (accessory)
9
Extract air fan
5
Filter (G4)
1
2
3
4
5
6
7
8
9

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Components description
Introduction
This section describes the individual components of the HRV 501. Please use the Fig. 1
illustration on page 4 for reference
Cabinet
Cabinet parts are made of aluzink coated sheet metal, finished with powder paint. Cabi-
net is internal sound and heat insulated, with fire retardant polyester foam. The unit´s
cabinet is designed for mounting in 10-40° C ambient temperature
Filters
The unit is standard equipped with class F7 cassette filter on supply air and G4 cassette
filter on exhaust air. These filters remove dust and particles, in both airflows going to
the heat exchanger. These filters protects the heat exchanger and improves the inside
en
vironment
During the filter timer period of
4380 hours, both fan speeds will increase, to compen-
sate for higher filters resistance. At every 500 hours decrease in remaining filter time,
each fan increases by 1%, without changing the differences in speed be
tween the two
fans Speed 4 will only be changed if initially calibrated below the default 100%
Heat exchanger
The heat exchanger moves the heat from extract air to the supply air. The heat ex-
changer is rotating slowly in order to move the exchanger parts from extract air to sup-
ply side
1. Heat is initially accumulate in the exchanger’s metal at the extract side
2. Secondly releasing this heat again to the supply air, after the exchanger has ro-
tated the heated area, to the supply air section.
Fans
Supply air fan supply fresh outdoor air through the unit’s heat exchanger to the distri-
bution ducts, where it
´s distributed to bedrooms, living rooms and possibly sauna or
steam bath.
The extract air
fan draws used and moistened air from inside, through the unit and heat
exchanger, in which most of the heat is moved to supply air. Finally the air is exhausted
to the outside.
Safety switch
When opening the unit, the safety switch breaks the power supply, and operation will
stop immediately.

6
Components description, continued
Electronic control
Detailed description of the electronic controls on page 7 , and user guide page 15
Temperature
sensors
Part
Description
T1
Outdoor air temperature
T2
Supply air temperature
T3
Extract air temperature
T4
Exhaust air temperature
Fig. 2
Safety switch
For safety reasons, the internal safety switch cuts off power supply when the units front
cover is removed. Remounting the front cover enables operation again.
Electric heating
element
(accessory)
Additional heat can be applied, if installing an electrical heat element (accessory list at
page
32) The heat element increases the supply air temperature, to compensate any
temperature drop over the heat exchanger in cold operation conditions.
Functionality described on in ventilation func
tionality at page 10
Electrical temperature set point described on page 18.
External humidistat
(accessory)
This unit features an external humidistat connection, for optional comfort enhance-
ment.
Place the humidistat in areas where humidity changes rapidly, e.g. bathrooms.
When air humidity is higher than set point, fan speed will increase to fan speed 4, until
humidity again is lower than set point, and the unit returns, to normal operation
T2
T1
T3
T4

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Electronic control
Introduction
This section gives you a detailed description of the electronic control
Function
The unit´s main controller is placed at the internal PCB (Fig. 3), together with I/O inter-
faces to internal components as well as accessories. Extension board with antenna(
Fig.
4
) is drawn outside of the cabinet, and connected to main PCB with a non-extendable
multicore cable
The battery operated remote control with disp
lay(Fig. 5), utilizes a highly flexible con-
trol option, communication with the HRV 501unit over radio waves
Wiring diagram to be found on page
41.Remote and main board are mated. Description
of this in section “initial setup” at page 12
Illustration
This drawing illustrates the remote controller, the main control board and the antenna:
Fig. 3
Fig. 4
Fig. 5
Remote control
display
Fig. 6
User guide at page 15 describes the use in details
continued overleaf
Weekday
Fan speed
Display of data
(Normal display
shows the actual
time)
Clock
Menu icons
Temperature set-
Fan speed
Filter alarm
Programmes
Service
Heat (Here step 10 of
10). Electric heating ele-
ment is an accessory
Operational feed back
Screen with dis-
Keyboard

8
Electronic control, continued
Start-up screen
This illustrates the start-up screen or ”normal screen con-
dition” (the example shows that it is Wednesday, the time
is 13:45, and the fan is running at step 1 speed):
Batteries
The remote controller uses two standard 1,5 V AAA batteries (included)
Activating
The remote controller is automatically activated by pressing any random key.
Please note: After connecting the unit, it may take up to 2 minutes before the remote
controller shows the correct display
.
This will happen after each disconnection and reconnection of the unit. Power lo
os to
remote or unit will not erase any information
Power saving func-
tion
The remote controller switches automatically off after approx. 2 minutes without acti-
vating any of the keys (Sleep function).
Faulty operation
/filter alarm
The remote controller is automatically activated for about 1 minute every two hours to
test for faulty operation or filter alarm.

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Air flow and filters
Introduction
This section describes the airflows and filters of HRV 501.
Important
This ventilation unit should operate continuously!
If operation stops, it could result in leaking cold air from outside, giving condensate
water in ducts and unit, and in worst cases, dripping water from air diffusers
Function
The unit supplies fresh air, drawn in from the outside, to living rooms including sauna
and steam bath if present.
The dirty and humid air is drawn out from the kitchen, the living rooms, the baths etc.
and led into the unit, where the unit reuses the heat from the dirty air to warm up the
fresh outdoor air before this is blown into the house.
Illustration of air
flows
Figur 1
Air flow descrip-
tion
•T1- Fresh outdoor air entering the unit, ready to be heated by the extract air
from the inside of the house (T3)
•T2 – House supply air, heated by the extract air from inside the house
•T3 – Extracted indoor air, used to heat the incoming fresh outdoor air
•T4 - Exhaust air (used and polluted air) is ducted out of the house
Filter guard
After approx. 4380 running hours, corresponding to approx. 6 months use, the filter
alarm function will activate a buzzer in the remote controller. The guide at page
30 de-
scribes
filter change
The filter timer has to be reset according the guide at page 21
T2
T1
T3
T4

10
Ventilation functionality
Introduction
This section gives you a description of the ventilation functions of HRV 501.
Level of ventilation
The overall level of ventilation can be controlled automatically by using the week pro-
gram, or manually by selecting a fixed fan speed, as described at page 16
Temperature com-
pensated operation
The rotor heat exchanger is controlled electronically, to optimize indoor comfort in dif-
ferent outside temperature conditions.
•Heat recovery in situations when inside temperature is 3°C higher than outside
temperature
•Cooling in summer conditions, when inside temperature is too high, and out-
side temperature is low enough to cool down the residence
•Restore inside chill, when outside temperature is 3°C higher than inside.
Below table shows when heat or chill recovery is active
Figur 2
When rotor is off, it will turn for 60 seconds each hour, for hygienic reasons.
Continued overleaf
Rotor active
Heat recovery
Rotor active
c
hill recovery
Rotor off
summer cooling
Rotor off
summer heating
Cooling on/off
Heat on/off
Inside temp
Outside temp

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Ventilation functionality, continued
Defrosting
The unit is equipped with a defrosting functionality, to protect the exchanger from
stopping, and eventually prevent permanent damage to the unit.
If both:
•The outside temp is below -15°C
•The heat exchanger efficiency is low (fx. due to high air flow)
for 30 minutes
or more, the defrosting will start automatically.
Defrost will:
1. Decrease supply fan with 1% each 60 seconds until adequate efficiency is
achieved.
2. If supply fan finally decreases below 20%, it will switch off.
3. When switched off, new measurements are executed every 30 minutes.
4. When the efficiency or outside temp is exceeding the limits, reverse operation
starts, initial supply fan 20% on, and 1% increase each 60 seconds
Electric heating ele-
ment
(accessory)
Heating is active if supply air is below temperature set
point. (page
18)Heating deactivates again if temperature is
set point +2°C or more
The electric
heating element has 10 steps. The function of
these steps is to keep the electric heating element lit for 1
to 10 seconds during a period of 10 seconds. The steps
are calculated each 60 seconds according below scheme:
Condition
Action
If supply air temperature T2 is lower than Tmin
Increases one step
If supply air temperature T2 is between T
min
and T
min
+2
No change
If supply air temperature T2 is higher than T
min
+2
Decrease heat one step
Fireplace
When igniting the fireplace, it could be a help to stop the HRV 501 exhaust fan in 5
minutes, resulting in over pressure inside the house: The air will then rather escape
through the fireplace and chimney instead, reducing the risk of smoke in the living
room.

12
Installation and initial setup
Introduction
This section will guide you through unpacking, mounting and installation
Important
Warranty is restricted to units, vertical installed by trained and certified personnel only.
Wrapping
HRV 501 is delivered in a cardboard box.
Check content
Follow this procedure to check the content of the box:
Step
Action
1
Unpack the unit carefully. Don’t use a knife
2
Check the content of the box before mounting
3
Figur 3
Continued overleaf
Manual
Wall bracket for mounting
Antenna
Remote controller

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Installation and initial setup, continued
Mounting
Follow this procedure to mount the unit:
Step
Action
1
Fasten the wall bracket on
the wall, with at least two
appropriate screws de-
pendent of wall structure
2
Mount the two vibration
and noise dampers at the
lower rear of the unit.
Continued overleaf

14
Installation and initial setup, continued
3
Lift the HRV 501 onto the
wall bracket
Important!
Verify that the unit is lev-
elled both horizontal and
vertical
4
Connect 230 VAC. The unit will connect to the supplied factory mated re-
mote control.
If 0000 is shown in the display, the remote control is mated with a unit, but
without wireless connection (outside range)
5
Please note: The remote controller switches off after 2 minutes without key
activity (Sleep function)
Connect additional
remote controls
If mating additional remote controls to one unit, please follow these below steps.:
Step
Action
1
Insert the batteries to the remote, and press any random key, to activate the
remote. Display will now show 8888 in display, indicating it´s a virgin remote
2
Remove and reconnect the 230V AC power to reboot the unit, and start mat-
ing process
3
The antenna´s LED flashes green, subsequently switching to fixed green LED
when mating has been successful. The remote display switches to showing
the clock when mated. This process last maximum 60 seconds.
4
If 0000 is shown in the display, the remote control is mated with a unit, but
without wireless connection (outside range)
A remote controls mating to a specific unit, cannot be reset or deleted.

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User’s guide
Introduction
This section describes how the remote controller can be used to set various parameters
and display the units
running condition
Content
This section covers the following topics:
Main function..................................................................................................16
Set the time ....................................................................................................17
Adjusting temperatures...................................................................................18
Fire place........................................................................................................19
Calibrate fan speed .........................................................................................20
Filter alarm timer ............................................................................................21
Week programmes ..........................................................................................22
Service menu ..................................................................................................25

16
Main functions
Activating the re-
mote controller
Activate the remote controller by pressing any key (if deac-
tivated). The display will show its home screen
Manuel fan speed
HOME - UP/DOWN will select fan speed manually in four in-
dividual steps.
Speed 4 (highest) is deactivated after 4 hours, and speed 3
is automatically selected.
Temperature read
out
HOME -LEFT/RIGHT toggles through the unit´s four air
temperature sensors, placed inside the unit.
Menu navigation
HOME - OK activates the settings menu. The first icon from left
”CLOCK” will start flashing.
LEFT/RIGHT
toggles through the menu’s,
OK
for selecting a menu
UP/DOWN
to adjust a parameter inside a menu
This example show it´s Wednesday, the
time is 13:45. All menu icon on indicat-
ing that the fan is set manually in step
one.
An arrow show selected air sensor
Temperature is shown in the clock position
In this case the outside air is -3°C, when entering
the unit
One bar visible – speed 1
Two bars visible – speed 2
Three bars visible – speed 3
Top bar only is flashing – speed 4
If only calendar icon is visible, the unit is run-
ning in auto fan speed week program mode
OK

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Set the time
Introduction
This section describes how to set the time.
Display when the menu ”clock” is activated:
Setting
Follow these steps to set the time
Step
Action
Result
1
Press OK – clock icons starts flashing.
(Press
RIGHT
/
LEFT
to toggle through menu
item)
Time adjustment possible
2
Use UP and DOWN keys to set the hours
Hours change
3
Press RIGHT key
”Minute” digits are flashing
4
Press UP/DOWN keys and set the minutes
Minutes change
5
Press OK
”Weekday” flashes
6
Press RIGHT/LEFT keys to set the weekday
Weekday changes
7
Press OK to confirm
The display returns to ”normal
screen” again

18
Adjusting temperatures
Introduction
Following temperatures are adjustable
•Temperature for heating (Tmin)
(electric heating element is accessory)
Set the low limit of supply air temperature. Default is 18°C
•Temperature for summer mode (Tmax)
Set the temperature where the exchanger is stop. Default
is 30°C
Functionality overview to be found in section “Ventilation ”
on page 10
NB
The difference between T
min
and T
max
can never be less than 5 degrees. This will avoid
inconvenient situations where the unit is trying to heat and cool at the same time.
Setting
Follow these steps to set the temperatures
Step
Action
Result
1
Press OK – clock icons starts flashing.Press
RIGHT
/
LEFT
to select temperature icon-
OK
to
enters the menu
The selected menu is acti-
vated
2
Press UP/DOWN keys to set T
min
Temperature. (Only relevant if the unit is fitted
with an electric heating element)
The temperature digits
change
3
Press OK
”Tmax” flashes
4
Press UP/DOWN key and set Tmax temperature
The temperature digits
change
5
Confirm by pressing OK
The display returns to ”nor-
mal screen” again