Nibe VVM 320 User manual

Technical manual
APH
NIBE™ VVM 320
Indoor module
TEM GB 1451-1
M11742

Table of Contents
21 Important information
2Document information
2Safety information
2Symbols
2Marking
2Serial number
3Contact information
42 Indoor module's design
4VVM 320
5
5Pipe connections
5HVAC components
5Sensors etc.
5Electrical components
5Miscellaneous
63 System description
6Principle of operation
6Pipe connections
6HVAC components
6Sensors etc.
7System diagram
84 Description of functions
8Description of functions
8Menu tree
11Operating status
13Hot water
15Heating
16Cooling
16Scheduling
17Addition
17Load monitor
18External connection options
19Circulation pumps
22Supply pump exercise
22Valves
22Valve exercising
22Floor drying
22Uplink
23Smart Grid (SG)
24USB
26Accessories
355 Component description
35Components
39Sensors
39Data temperature sensor
40Electronics
40Immersion heater card (AA1)
40Base card (AA2)
40Input circuit board (AA3)
41Display unit (AA4)
426 Troubleshooting
42Alarm list
42A-alarm
46B alarm
49Troubleshooting guide
49Alarm 1 - sensor fault
50Alarm 2, 3, 6, 31 - sensor fault
51Alarm 33-38 – sensor fault
52Alarm 70 - perm. com.error input card
53Alarm 71 - perm. com.error input card
54Function check, components
54Relay test - forced control
55Function check, circulation pumps
567 Component replacement
56Basic
56Removing the covers
56Accessibility, electrical connection
59Main components
59Replacement of immersion heater
62Replacing the circulation pump GP1
64Replacing the circulation pump GP6
66Replacement of reversing valve QN 10
69Circuit board and electronics
69Immersion heater card (AA1)
70Base card (AA2)
71Input circuit board (AA3)
72Display unit (AA4)
738 Technical data
73Electrical circuit diagram, 3 x 400V
78Dimensions and setting-out coordinates
79Technical specifications
793x400V
80Index
1Table of Contents |NIBE™ VVM 320

Document information
This technical manual is a complement to the Installer
handbook for VVM 320, containing:
■Description of functions and component description.
■Information to facilitate fault-tracing.
■Instructions for replacing components.
■Wiring diagram.
■Supplementary technical information.
The document applies to VVM 320 with software ver-
sions up to and including v4272R5.
The heat pump software version can be found in the
info menu (menu 3.1).
Safety information
This manual describes installation and service proced-
ures for implementation by specialists.
This appliance can be used by children
aged from 8 years and above and per-
sons with reduced physical, sensory or
mental capabilities or lack of experience
and knowledge if they have been given
supervision or instruction concerning
use of the appliance in a safe way and
understand the hazards involved. Chil-
dren shall not play with the appliance.
Cleaning and user maintenance shall
not be made by children without super-
vision.
Rights to make any design or technical
modifications are reserved.
©NIBE 2014.
Symbols
NOTE
This symbol indicates danger to machine or
person.
Caution
This symbol indicates important information
about what you should observe when main-
taining your installation.
TIP
This symbol indicates tips on how to facilitate
using the product.
Marking
VVM 320 is CE marked and fulfils IP21.
The CE marking means that NIBE ensures that the
product meets all regulations that are placed on it
based on relevant EU directives. The CE mark is obligat-
ory for most products sold in the EU, regardless where
they are made.
IP21 means that the product can be touched by hand,
that objects with a diameter larger than or equivalent
to 12.5 mm cannot penetrate and cause damage and
that the product is protected against vertically falling
drops.
Serial number
The serial number can be found at the bottom right of
the front cover and in the info menu (menu 3.1).
Serial number
Caution
Always give the product's serial number (14
digits) when reporting a fault.
NIBE™ VVM 320Chapter 1 | Important information2
1 Important information

Contact information
KNV Energietechnik GmbH, Gahberggasse 11, 4861 SchörflingAT
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.knv.at
NIBE Wärmetechnik AG, Winterthurerstrasse 710, CH-8247 FlurlingenCH
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.ch
Druzstevni zavody Drazice s.r.o, Drazice 69, CZ - 294 71 Benatky nad JizerouCZ
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.cz
NIBE Systemtechnik GmbH, Am Reiherpfahl 3, 29223 CelleDE
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.de
Vølund Varmeteknik A/S, Member of the Nibe Group, Brogårdsvej 7, 6920 VidebækDK
Tel: [phone] Fax: [phone] E-mail: [email protected] www.volundvt.dk
NIBE Energy Systems OY, Juurakkotie 3, 01510 VantaaFI
Puh: 09-274 697 0 Fax: [phone] E-mail: inf[email protected] www.nibe.fi
NIBE Energy Systems France Sarl, Zone industrielle RD 28, Rue du Pou du Ciel, 01600 ReyrieuxFR
Tel : [phone] Fax : [phone] E-mail: [email protected] www.nibe.fr
NIBE Energy Systems Ltd, 3C Broom Business Park, Bridge Way, Chesterfield S41 9QGGB
Tel: [phone] Fax: [phone] E-mail: [email protected].uk www.nibe.co.uk
NIBE Energietechniek B.V., Postbus 634, NL 4900 AP OosterhoutNL
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibenl.nl
ABK AS, Brobekkveien 80, 0582 Oslo, Postadresse: Postboks 64 Vollebekk, 0516 OsloNO
Tel. sentralbord: [phone] E-mail: [email protected] www.nibeenergysystems.no
NIBE-BIAWAR Sp. z o. o. Aleja Jana Pawła II 57, 15-703 BIAŁYSTOKPL
Tel: [phone] Fax: [phone] E-mail: [e-mail] www.biawar.com.pl
© "EVAN" 17, per. Boynovskiy, Nizhny NovgorodRU
Tel./fax [phone] E-mail: [email protected] www.nibe-evan.ru
NIBE AB Sweden, Box 14, Hannabadsvägen 5, SE-285 21 MarkarydSE
Tel: [phone] Fax: [phone] E-mail: [email protected] www.nibe.se
For countries not mention in this list, please contact Nibe Sweden or check www.nibe.eu for more information.
3Chapter 1 | Important informationNIBE™ VVM 320

VVM 320
Wilo
VVM320
Wilo
VVM320
AA3
PF1
PF3
XL4 XL3 XL9 XL8 XL1 XL2
BT63
GP6
EB1
PF1
GP1
AA4
AA4-XJ4
AA4-XJ3
SF1
FL2
FL1
QM20
BT30
FD1
AA1
AA1-S2
FA1
AA2
W130
QM11
BT6
QN10
BT7
BP5
QM22
NIBE™ VVM 320Chapter 2 | Indoor module's design4
2 Indoor module's design

BT3
BT2
UB2
UB1
BF1*
XL5
RM1
CM1
Pipe connections
Connection, heating medium supply line Ø22
mm
XL1
Connection, heating medium return line Ø22
mm
XL2
Connection, cold water Ø22 mmXL3
Connection, hot water Ø22 mmXL4
Connection, docking in heating medium Ø22
mm
XL8
Connection, docking out heating medium Ø22
mm
XL9
HVAC components
Expansion vessel, closed, heating mediumCM1
Safety valve, water heaterFL1
Safety valve, heating mediumFL2
Circulation pumpGP1
Circulation pump, heating mediumGP6
Venting, climate systemQM20
Venting valve, coilQM22
Reversing valve, climate system/water heating,
flow line
QN10
Filler valve, heating mediumQM11
Check valve, cold waterRM1
Sensors etc.
Manometer, heating systemBP5
Temperature sensors, heating medium flowBT2
Temperature sensors, heating medium returnBT3
Temperature sensor, hot water, chargingBT6
Temperature sensor, hot water, topBT7
Thermostat, standby modeBT30
Temperature sensor, heating medium supply
after immersion heater
BT63
Electrical components
Immersion heater cardAA1
AA1-SF1 Switch
Base cardAA2
Input circuit boardAA3
Display unitAA4
AA4-XJ3 USB socket
AA4-XJ4 Service socket
Energy meterBF1*
Immersion heaterEB1
Miniature circuit-breakerFA1
Temperature limiterFD1
SwitchSF1
Network cable for NIBE UplinkTM W130
Miscellaneous
Rating platePF1
Serial number platePF3
Cable glandUB1
Cable glandUB2
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
*Applies to VVM 320 R, VVM 320 3x230V R and VVM 320 E EM. Available as accessory EMK 300 for other markets.
5Chapter 2 | Indoor module's designNIBE™ VVM 320

Principle of operation
XL2XL9
XL3
QN10
XL8
XL4
XL1
BT6
BT7
EB1
BT63
GP1
FL1 GP6
BT3
CM1
BT2
RM1
FL2
Pipe connections
Connection, heating medium supply line Ø22
mm
XL1
Connection, heating medium return line Ø22
mm
XL2
Connection, cold water Ø22 mmXL3
Connection, hot water Ø22 mmXL4
Connection, docking in heating medium Ø22
mm
XL8
Connection, docking out heating medium Ø22
mm
XL9
HVAC components
Expansion vessel, closed, heating mediumCM1
Safety valve, water heaterFL1
Safety valve, heating mediumFL2
Circulation pumpGP1
Circulation pump, heating mediumGP6
Reversing valve, climate system/water heating,
flow line
QN10
Check valve, cold waterRM1
Sensors etc.
Manometer, heating systemBP5
Temperature sensors, heating medium flowBT2
Temperature sensors, heating medium returnBT3
Temperature sensor, hot water, chargingBT6
Temperature sensor, hot water, topBT7
Temperature sensor, heating medium supply
after immersion heater
BT63
Designations in component locations according to
standard IEC 81346-1 and 81346-2.
NIBE™ VVM 320Chapter 3 | System description6
3 System description

System diagram
Outline diagram
-EB1
-GP9 -BT51 -HQ4
-EP5
-AA25
-CL11
-CL11-QN19
-CL11-GP12
POOL
-CP10
-QN12
-AA25
-EQ1
-GP13
-GP12
-BT64
-BT3
-BT2
-EP21
-GP20
-QN25
-AA25
-FL10
-QM41
-QM40
-HQ1
-EB101
-EB15
Explanation
Pool packageCL11
Unit boxAA25
Temperature sensor, poolBT51
Exchanger, poolEP5
Pool, pumpGP9
Charge pump, poolGP12
Particle filterHQ4
Three way valve, poolQN19
VVM 320EB15
Heat pumpEB101
Safety valveFL10
Particle filterHQ1
Shut-off valveQM40
Shut-off valveQM41
Climate system 2EP21
Unit boxAA25
Temperature sensor, heating medium, flowBT2
Temperature sensor, heating medium, returnBT3
Circulation pump, heating medium, lower shuntGP20
Mixing valve, additionQN25
Active cooling module ACS 310EQ1
Unit boxAA25
Temperature sensor, cooling, supply lineBT64
Single jacket accumulator tank, coolingCP10
Charge pumpGP12
Circulation pump, coolingGP13
Three way valve cooling/heatingQN12
Miscel-
laneous
Extra electric additional heatEB1
7Chapter 3 | System descriptionNIBE™ VVM 320

Description of functions
Menu tree
Menu 1 - INDOOR CLIMATE
1.1 - temperature1 - INDOOR CLIMATE
1.3.1 - heating1.3 - scheduling
1.9.1 - heating curve1.9 - advanced
1.9.2 - external adjustment
1.9.3 - min. flow line temp.
1.9.4 - room sensor settings
1.9.5 - cooling settings *
1.9.7 - own curve
1.9.8 - point offset
1.9.11 - +Adjust
Menu 2 - HOT WATER
2.1 - temporary lux2 - HOT WATER
2.2 - comfort mode
2.3 - scheduling
2.9.1 - periodic increase2.9 - advanced
2.9.2 - hot water recirc.
Menu 3 - INFO
3.1 - service info3 - INFO
3.2 - compressor info
3.3 - add. heat info
3.4 - alarm log
3.5 - indoor temp. log
* Accessories are needed.
NIBE™ VVM 320Chapter 4 | Description of functions8
4 Description of functions

Menu 4 - HEAT PUMP
4.1.1 - pool *4.1 - plus functions4 - MY SYSTEM
4.1.3.1 - nibe uplink4.1.3 - internet
4.1.3.8 - tcp/ip settings
4.1.3.9 - proxy settings
4.1.4 - sms *
4.1.5 - SG Ready
4.1.6 - smart price adaption
4.2 - op. mode
4.3 - my icons
4.4 - time & date
4.6 - language
4.7 - holiday setting
4.9.1 - op. prioritisation4.9 - advanced
4.9.2 - auto mode setting
4.9.3 - degree minute setting
4.9.4 - factory setting user
4.9.5 - schedule blocking
4.9.6 - schedule silent mode
* Accessories are needed.
9Chapter 4 | Description of functionsNIBE™ VVM 320

Menu 5 - SERVICE
5.1.1 - hot water settings5.1 - operating settings5 - SERVICE
5.1.2 - max flow line temperature
5.1.3 - max diff flow line temp.
5.1.4 - alarm actions
5.1.10 - op. mod heat med pump
5.1.11 - pump speed heating medium
5.1.12 - internal electrical addition
5.1.13 - max inst. el.pwr (BBR)
5.1.14 - flow set. climate system
5.1.18 - flow setting charge pump
5.1.22 - heat pump testing
5.1.23 - compressor curve
5.2.2 - installed heat pump5.2 - system settings
5.2.4 - accessories
5.3.2 - shunt controlled add. heat *5.3 - accessory settings
5.3.3 - extra climate system *
5.3.6 - step controlled add. heat
5.3.8 - hot water comfort *
5.4 - soft in/outputs
5.5 - factory setting service
5.6 - forced control
5.7 - start guide
5.8 - quick start
5.9 - floor drying function
5.10 - change log
5.11.1.1 - heat pump5.11.1 - EB1015.11 -heat pump settings
5.11.1.2 - charge pump
* Accessories are needed.
NIBE™ VVM 320Chapter 4 | Description of functions10

Operating status
General
There are three operating modes available: Auto,
Manual and Add. heat only
RemarksSelectable func-
tions
Operating
mode
(menu 4.2)
All operating
modes permitted
autoauto
cooling only dis-
played if selected in
menu 5.2.
heating, addition,
cooling
manual
Cooling and heat-
ing can be selected
simultaneously if:
■a room sensor is
installed and ac-
tivated
or
■4-pipe cooling
system used.
compressor
blocked
heatingadd. heat
only
If addition is blocked it is permitted when:
■hot water lux, temporary or continuous.
■periodic hot water increase.
■auxiliary operation if the compressor is blocked.
■anti-freeze.
■cooling operation.
Blocking of additional heat regards heat production
but can to some degree also affect hot water produc-
tion.
Hot water production can be blocked in the schedule.
In Auto operating mode the control selects the operat-
ing mode based on the following parameters. The
temperatures are average temperature during the time
it is selected in "filter time".
RemarksFactory
setting
NameMenu
Icons in the main
menu and in menu
4.2 are displayed
when addition is
blocked.
+5 °CStop addi-
tion
4.9.2
Icons appear in
menu 4.2 when
heating is blocked.
+17 °CStop heat-
ing
Time for average
temperature calcula-
tion
24 hrsFilter time
Auxiliary operation
"Auxiliary operation" is a type of emergency mode that
can be selected manually when the alarm has occurred.
This means that the heat pump produces heat and/or
hot water despite there being some kind of problem.
This can mean that the heat pump's compressor is not
running. In this case the immersion heater produces
heat and/or hot water.
Status lamp lights red in the event of a deployed auxil-
iary operation.
11Chapter 4 | Description of functionsNIBE™ VVM 320

Anti-freeze climate system VVM320
If heating is actively shut-off and it becomes colder outdoors, heating is activated to prevent the heating system
from freezing.
If heating is blocked and the outdoor temperature (BT1) drops below +3°C, the anti-freeze function activates.
■Heating medium pump GP1 starts and the heating calculation with min supply line as set point value.
■Additional heat is permitted, even if another function has blocked it, but the compressor will remain blocked. The
alarm and load monitor can block/restrict the additional heat however.
■There is no anti-freeze for pool.
If the anti-freeze function is active and the outdoor temperature (BT1) exceeds +3.5°C, the anti-freeze function de-
activates.
Circulation pumps connected to accessory cards are active.
Anti-freezing outdoor unit
Frysskydd
av utedel
Givarfel på utetemp (1:a
hand OU_BT28
2:a hand EB100 - BT1) el.
OU_BT3 el. OU_BT12
Frysskydd
aktivt
Utedel
saknas
Tid i sek som GP12 stått
stilla sedan den senast
gick > f(utetemp)*
BT12 < 10
eller
BT3 < 10
BT12 > 40
och
BT3 > 40
BT12 > 20
och
BT3 > 20
Pump aktiv
> 1 min
Aktivera
frysskydd
Inaktivera
frysskydd
Avaktivera
frysskydd
Markera frysskydd
aktivt
Ja Nej
NejNej
Nej
Nej
Nej
Nej
Nej
Nej
Nej
Nej
Ja
Ja
Ja
Ja
Ja
Ja
Ja
Ja
Ja Ja
Frysskydd
inaktivt
Frysskydd
inaktivt
Frysskydd
aktivt
BT28 < 2°C
Frysskydd
aktivt
Frysskydd
aktivt
Frysskydd
aktivt
* f är en rät linje som anger tid mellan
pumpdrift som funktion av BT28.
f(utetemp)=90*utetemp+3000 (ute-
temp i °C).
Ex)
utetemp = 0°C => 3000 s (50 min)
utetemp = -30°C => 300 s (5 min)
utetemp = +10°C => 3900 s (65 min)
VVM 500 / 310 / 320
SMO 20/ SMO 40
Yes No
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
No
No
No
No
No
Anti-freeze
of outdoor unit
Anti-freeze
active
Activate
anti-freeze
Anti-freeze
active
Deactivate
anti-freeze
Anti-freeze
active
Anti-freeze
active
Anti-freeze
not active
BT28 < 2°C
Sensor fault on outdoor
temp
(1st OU_BT28
2nd EB100 - BT1) el.
OU_BT3 el. OU_BT12
Outdoor unit
missing
Time in seconds that
GP12 has been
stationary since it last
ran > f(outdoor temp)*
BT12 < 10
or
BT3 < 10
Mark anti-freeze
active
BT12 > 40
and
BT3 > 40
Pump active
> 1 min
BT12 > 20
and
BT3 > 20
Deactivate
anti-freeze
Anti-freeze
not active
Anti-freeze
active
* f is a straight line that indicates the
time between pump operations as a
function of BT28.
f(outdoor temp)=90*outdoor
temp+3000 (outdoor temp in °C).
E.g.
outdoor temp = 0°C => 3000 s (50
min)
outdoor temp = -30°C => 300 s (5
min)
outdoor temp = +10°C => 3900 s (65
min)
VVM 500 / 310 / 320 / 325
SMO 20 / SMO 40
NIBE™ VVM 320Chapter 4 | Description of functions12

Emergency mode
Emergency mode is selected with the control switch,
and is indicated by a yellow lamp.
Internal circulation pump GP1 runs at full speed and
GP6 is stationary. Reversing valve (QN10) is open to-
wards the heating system.
The immersion heater power is set with the dipswitch
on the immersion heater card (AA1). The max flow
temperature can be set to between 35 and 45 °C on
the emergency mode thermostat (FD1) .
External circulation pumps do not run.
Factory setting:
Immersion heater output 6 kW (Dipswitch setting, im-
mersion heater card (AA1): 101010)
Emergency mode thermostat set to 35 °C.
Add. heat only
To run the system without heat pump connected, its
pipe ends must be connected together to ensure circu-
lation in the charge circuit. Also check that there is anti-
freeze.
Heat pump EB10X must be deactivated in menu 5.2.2
to prevent communication alarm.
Operating mode must be set to only additional heat.
Sensor calibration
Sensors are calibrated to increase accuracy of control
and energy measurement. Calibration occurs at start-
up and every 3 months. If VVM 320 restarts calibration
starts again and the correction value is = 0.
In VVM 320, EB 101-BT3 is calibrated to EB101-BT12
and GP1 runs, gives info alarm. 354. Thereafter, with
the calibrated and adjusted EB101-BT3, BT63 is adjus-
ted, gives info alarm 355.
Calibration sequence:
■When neither compressor nor internal immersion
heater work towards any demand, GP1 runs at max-
imum permitted speed, all reversing valves must be
set to heating.
■When GP1 has run for 6 minutes and the compressor
as well as the internal immersion heater have not
been active, the average value of EB101-BT3 and
EB101-BT12 are taken and calibrated against each
other during the last minute.
■Then the two average values are compared and the
two sensors (EB101-BT3 and EB101-BT12) are adjus-
ted equally, the BT63 is adjusted according to the
calibrated and adjusted EB101-BT3.
■If calibration fails 3 times, info alarm 354 and VVM
320 cease calibration until EB101 is restarted.
Reasons to cancel or not start calibration:
■Forced control active
■Demand other than OFF on compressor
■Start guide active
■Flow guide active
■Phase detection active
■Sensor fault on supply/return sensor
■Compressor active
■Electric additional heat active
■Alarm or info alarm active
■Heating not permitted
■Cooling permitted as well as two-pipe cooling active
Hot water
General
Three hot water temperatures can be selected. Eco-
nomy, Normal and Lux.
The demand for, charging and energy type is based on
the settings for hot water comfort.
Hot water may only be produced by compressor except
in cases where:
■DM less than Start_DM-Start_DM_additional heat
and Start_DM_additional heat is greater than 0
■DM less than Start_DM+Start_DM_additional heat
and Start_DM_additional heat is less than 0
Priority sequence
Hot water is produced according to the following
function/setting:
Selecting hot water production. (Yes/No.)1.
Alarms are handled in relation to the selected
alarm action.
2.
Temporary lux.3.
AUX input ”temporary lux”.4.
Holiday setting.5.
Periodic increase.6.
Scheduling hot water.7.
Normally set comfort mode.8.
Hot water capacity
The main menu displays a water drop with 3 fields to
indicate how much hot water is available.
Number of fieldsAverage temp
3Above 52 °C
2Between 46 and 52 °C
1Between 40 and 46 °C
0Below 40 °C
The capacity is calculated on the average temperature
of BT6 and BT7 if BT7 is connected, otherwise the values
apply from BT6.
13Chapter 4 | Description of functionsNIBE™ VVM 320

Hot water production Economy
Hot water demand occurs when:
■the temperature falls below the start temp on BT6.
Hot water demand ceases when one of the following
conditions is filled:
■the temperature is above the stop temp on BT6.
■Condenser supply line: BT12 ≥ max condenser out -
1K. (different depending on which external part is
installed).
■Condenser return line: BT3 ≥ max condenser in - 1K.
(different depending on which outdoor unit is in-
stalled).
Default values
Stop temp. eco-
nomy
Start temp. eco-
nomy
Menu
48 °C45 °C5.1.1
Limited so that the difference between start and stop
temperature is at least 3 K.
TIP
Selection of comfort mode (economy, normal
and lux) made in menu 2.2.
Hot water production Normal
Hot water demand occurs when:
■the temperature falls below the start temp on BT6.
Hot water demand ceases when one of the following
conditions is filled:
■the temperature is above the stop temp on BT6.
■Condenser supply line: BT12 ≥ max condenser out -
1K. (different depending on which external part is
installed).
■Condenser return line: BT3 ≥ max condenser in - 1K.
(different depending on which outdoor unit is in-
stalled).
Default values
stop temp. nor-
mal
start temp. nor-
mal
Menu
51 °C48 °C5.1.1
Limited so that the difference between start and stop
temperature is at least 3 K.
TIP
Selection of comfort mode (economy, normal
and lux) made in menu 2.2.
Hot water production Lux
Hot water is produced by the compressor until the ex-
ternal part's maximum supply temperature (BT12) or
maximum return temperature (BT3) is reached minus
one degree and thereafter by the set additional heat.
Hot water demand occurs when:
■the temperature falls below the start temp on BT6.
Hot water demand stops when:
■the compressor cannot produce as above and the
internal additional heat is blocked.
■the temperature is above the stop temp on BT6.
■the compressor can no longer produce and the in-
ternal additional heat is defined as 0 kW and there
is no external additional heat.
Default values
stop temp. luxstart temp. luxMenu
54 °C51 °C5.1.1
Limited so that the difference between start and stop
temperature is at least 3 K.
TIP
Selection of comfort mode (economy, normal
and lux) made in menu 2.2.
Hot water production below the balance point
Produces heating and hot water alternately.
Hot water production with internal immersion
heater
When hot water production only occurs with the im-
mersion heater, the max permitted electrical output is
used according to menu 5.1.12.
Temporary lux
Temporary lux can be selected in menu 2.1. Selectable
modes 3 h, 6 h, 12 h and Off.
No increase occurs if comfort mode Lux is selected.
NIBE™ VVM 320Chapter 4 | Description of functions14

Heating
Heating
Heat produced with selected outdoor unit.
Heating can also be created with one of the following:
■Internal electric additional heat before. QN10
■External additional heat
Continuous circulation of heat in the heating system
occurs:
■GP1 circulates the heating system during heating
operation and waiting mode.
■GP6 circulates the heating system during hot water
charging.
Desired supply temperature calculated as function of
filtered outdoor temperature with heat curve and any
offset.
Degree minutes
The heating requirement is calculated every minute
using the following formula (DM = Degree minutes):
New DM = Previous DM + (actual value - set point value)
Actual value is the temperature on BT25. If not avail-
able, BT2 is used.
Set point value is the calculated flow temperature.
Degree minutes (DM):
■DM is calculated every minute.
■DM is calculated in steps of 0.1 and displayed in
whole units.
■Manual change of DM occurs in units of ten, menu
4.9.3.
■At start-up DM is always 0.
■When heating is not permitted DM is locked on 0.
■Highest DM value is +100.
■Lowest DM value is the value of the last additional
heat step connection plus the difference between
additional heat steps.
Factory settingNameMenu
-60Start comp4.9.3
700Start addition
100Diff between addition-
al heat step
Forced control of degree minutes
Forced control is used to stop the compressor and
auxiliary heater when the actual value is too high in
relation to the set point value.
NOTE
Forced control is not active during and 5
minutes after a start or a shift from one de-
mand to another.
RemarksFactory set-
ting
NameMenu
Sets DM to:
+1
10 °CMax diff.
compressor
5.1.3
Sets DM to:
Start addi-
tional heat
+ diff
between ad-
ditional
heat step +
1
7 °CMax diff. ad-
ditional
heat
Heating curve
Curve coefficient and offset are used for setting of
correct set point value.
15 heat curves can be used.
Factory settingNameMenu
9Curve coefficient1.9.1
0Curve offset
Point offset
With point offset, the heating curve can be changed
at a specific outdoor temperature. The change starts
5 °C below and stops 5 °C above the set outdoor tem-
perature point.
Setting rangeNameMenu
-40 - 30 °COutdoor temperature
point
1.9.8
-10 - 10 °CChange in curve
Own curve
In own curve the desired flow temperature is selected
at fixed outdoor temperatures from -30 to +30 °C .
Factory settingNameMenu
45 °CFlow.temp -30 C1.9.7
40 °CFlow.temp -20 C
35 °CFlow.temp -10 C
32 °CFlow.temp 0 C
26 °CFlow.temp 10 C
15 °CFlow.temp 20 °C
15 °CFlow.temp 30 C
15Chapter 4 | Description of functionsNIBE™ VVM 320

Room sensor BT50
Connected to AA3-X6:3-4.
When the room sensor is connected the temperatures
are displayed in the main menu. To affect the room
temperature, it must be activated in menu 1.9.4. The
size of the room temperature sensor influence is de-
termined by the set factor.
The actual value of the flow line is changed by moving
the offset:
(selected - current room temp.) x set factor = changing
curve offset
Factory settingNameMenu
OffControl room sensor1.9.4
2,0Factor system 1
Cooling
Active cooling 4-pipe (ACS310)
Active cooling is produced by the air/water heat pump.
The accessory can control one cooling-charge pump
(-EQ1-GP12) and one cooling reversing valve (EQ1-
QN12), and one cooling circulation pump (-GP13) using
–BT64. An operating mode room sensor –BT74 can be
connected to the intended location on the main
product.
The cooling function is activated by filtered outdoor
temperature (filtration time can be set) and any room
sensors.
BT64 used for actual value during cooling operation.
The set point value is determined by a straight line
between set supply temperature at +20 °C and 40 °C
in outdoor temperature. Cooling DM is calculated for
start and stop of active cooling operation.
Cooling circulation pump (-GP13) is active when cooling
is permitted.
Cooling charge pump (-EQ1-GP12) is active when
cooling is produced and controls according to the
graph below.
DT
utetemperatur BT 1
40
30
20
10
10
8
6
4
2
0
Kylladdpump EQ1-GP12
DT (DM)
Outdoor temperature BT1 (°C)
Cooling charge pump
EQ1-GP12
Scheduling
If scheduled times overlap each other with different
adjustments a red exclamation mark is displayed to the
right of the menu line.
Menus for setting the different schedules can be found
in table:
NameMenu
Scheduling hot water2.3
Scheduling heating1.3.1
Scheduling holiday4.7
Scheduling silent mode4.9.6 and
5.1.20.X
Hot water
Water heating can be scheduled in two periods. Select-
able levels are Economy, Normal, Lux and Off.
Heating
Heating can be scheduled with three periods for each
climate system. Changing the set point value for the
room temperature sensor or changing the curve offset
is optional.
Holiday
Holidays can be scheduled with a start date and a stop
date. Changing the set point value for the room tem-
perature sensor or changing the curve offset is select-
able and for hot water Economy, Normal, Lux and Off
can be selected.
Silent mode
Reduces the speed of the fan during the scheduled
period to minimise the noise from the outdoor unit.
Set with start and stop time for the specified day.
If several machines are used, they can be controlled
individually.
NIBE™ VVM 320Chapter 4 | Description of functions16

Addition
Immersion heater (EB1)
The immersion heater can be set up to a maximum of
9 kW.
Delivery setting is 9 kW.
The immersion heater output is divided into 7 steps.
These 7 steps can then be restricted by BT63 as below.
No. of permitted stepsTemp BT63 (°C)
0>80
1>77
2>74
3>72
No restriction<72
Max. output
As there are regulations that determine the maximum
permitted electrical output for heating a building, the
immersion heater's maximum output is locked to
comply with these regulations.
One week after setting maximum output, the system
locks permanently at this value and the display unit
must be replaced if one later needs to increase the
maximum output.
Heating mode
During heating operation the immersion heater is
controlled by the degree minute calculation.
RemarksFactory
setting
NameMenu
9 kWMax electrical
output
5.1.12
Degree minute
deficit for start
of additional
heat.
700 DMstart addition4.9.3
100 GMdiff. between
additional
steps
Hot water operation
All additional heat must have been stepped out before
changing to hot water, see calculating hot water de-
mand.
When shifting back to heating, the additional heat step
must be stepped in as indicated by DM.
Function during defrosting
If BT6 or EB101-BT3 is less than Tank defrost temp (see
image).
Hot water is prioritised until Tank defrost temp has
been reached.
QN 10 towards hot water and additional heat is used
until the tank defrost temp + 5K has been reached.
Conditions for tank defrosting depending on the value for -BT3
0 10
10
-10-20 20
20
30
40
Temperatur retur
Tank defrost
temperatur
Utomhustemp
OU
Tank defrost
Temperature return
BP4
Outdoor temp
°C
°C
Tank defrost
temperature
Load monitor
The current sensors are connected to AA3-X4:1-4.
Function:
■If any of the internal phases exceed the set value and
the phase sequence is not detected, electrical power
is disconnected from one of the internal phases. Be-
cause the phase sequence is not detected this can
mean that the incorrect phase sequence is disconnec-
ted, so that the output is still too high. The heat pump
continues by disconnecting another phase, until the
current does not exceed the set value. If the current
still exceeds the set value when all internal phases
are disconnected, the same process is performed for
external additional heat, if applicable and is set to
step-controlled additional heat.
NOTE
Do not disconnect the external additional
heat if it is set to give additional heat in one
step.
.
■If the phase sequence is detected the electrical out-
put is disconnected in the phase that exceeds the set
value. This will also handle any external additional
heat.
■If disconnecting the phases does not work, the heat
pump will finally disengage.
■Reconnection occurs when the current has fallen to
a value low enough to permit reconnection.
17Chapter 4 | Description of functionsNIBE™ VVM 320

NOTE
VVM 320 must be filled with water before the
phase sequence is detected.
For the heat pump to disconnect the electrical output
in the correct phase, the phase sequence must have
been detected during the installation. In the menu
5.1.12 the phase sequence must be detected after-
wards. An unsuccessful detection may be due to the
current sensors not being correctly connected or that
other electrical equipment started or stopped during
detection.
Factory settingNameMenu
16Afuse size5.1.12
detect phase order
1-phase inverter stepping out:
Variant of load monitor designed to be used in in-
stances where 1-phase inverters are used.
Compressors together with 3-phase disconnectable
additional heat:
Load monitor initially disconnects the immersion
heater's output. Finally the heat pump frequency is
reduced.
If this phase is used to drive 1-phase inverter com-
pressor:
Initially, the step-controlled additional heat is discon-
nected from this phase as per the section above regard-
ing disconnecting the step-controlled additional heat.
If the electrical power still exceeds the set value the
compressor slows to 20 Hz per 30 seconds until the
electrical power falls below the set value.
External connection options
AUX inputs
There are 5 x external inputs with selectable function.
Connected on AA3-X6:9-18.
The selectable functions are activated in menu 5.4.
Selectable functions that are active when the input is
connected:
AUX1-5
■Not used.
■Activate temporary lux
■External adjustment
■Block additional heat
■Blocking Compressor
■Block heating
■Block cooling
■Cooling/heat sensor (BT74)
■Tariff blocking
■SG ready A
■SG ready B
■External alarm (NC)
■External alarm (NO)
■+Adjust
AUX outputs
The selectable functions on the AUX output AA3 -X7
(max 2 A) are activated in menu 5.4:
AA3-X7
■Not used
■Add heat in series
■Alarm output
■Cooling mode indication
■Hot water circulation
■Ext. heating medium pump
Extra additional heat in charge circuit
Controls (via the AUX output, terminal X7) additional
heat which is in series between heat pump and VVM
320. The additional heat controls in one step and is in-
tended to support the installation when the heat pump
is stationary.
The additional heat must be dimensioned so that it is
in proportion to the installed heat pump. Because the
additional heat output is not known and an output is
required for the pump regulator, 7,5 kW is assumed.
If ”add heat in series” is selected on the AUX output
and the degree minutes are less than the selected value
in menu 4.9.3 ”start compressor”, the AUX relay opens
during the following:
■Red light alarm from heat pump
■Communication alarm from heat pump.
■Cold outdoor air, heat pump.
■Only additional heat selected in menu 4.2.
The AUX relay must be off if the degree minutes are
greater or equal to 0 DM.
When the AUX relay is on, charge pump GP1 must run:
■If the speed is set to ”manual speed” in menu
5.11.1.2, GP1 is run according to the menu settings.
■If the speed is not set to ”manual speed” in menu
5.11.1.2, GP1 runs and calculates that the additional
heat in the charge circuit produces 7,5 kW. GP1 runs
as if the internal additional heat is on.
NIBE™ VVM 320Chapter 4 | Description of functions18