IVT 290 A/W
Electric boiler
User Guide
Art. no: 12322 Version 1.0
Thank you for choosing a heating installation from
IVT Industrier AB
We hope that our heating installation meets your expectations and gives you many years of energy saving. We want you and
your family to enjoy a good economy at the same time as you actively safeguard the environment. We have taken today’s
demands on heating systems into consideration and believe that your Optima heat pump with 290 A/W will give you many
useful functions in the future. Your system features an advanced control unit that monitors and controls the temperature
in the house as well as the hot water and contributes towards improved overall economy. The system has, for example, a
holiday function, that is to say the heat pump can be set at a “low level” while you are away on holiday.
IVT is the leading heat pump manufacturer in the Nordic Countries. More than every second heat pump comes from IVT.
We have worked with solutions to reduce energy consumption on the environment’s terms for more than 30 years. Today,
we can present the widest range of heat pump systems for effi cient energy saving in all types of housing and properties.
Guide IVT 290 A/W Electric boiler
IVT Industrier AB, 2007/09
Article number: 12322
Version 1.0
Copyright © 2007. IVT Industrier AB. All rights reserved. IVT reser ves the right to make changes to the product without prior notice.
This manual contains copyright protected information that is the property of IVT Industrier AB. No par t of this document may be copied or forwarded,
electronically or mechanically, without prior, written permission from IVT Industrier AB. This includes photographing and translation to another language.
3
Table of Contents
Innehåll
FOR THE USER .............................................................................................................. 4
Important information ...................................................................................................4
General .........................................................................................................................5
This is how your electric boiler works ..............................................................................6
Component parts ...........................................................................................................7
Maintenance ..................................................................................................................8
Check the pressure gauge ..........................................................................................................................................8
Clean the discharge water vessel ...............................................................................................................................8
Check the safety valves .............................................................................................................................................. 8
What to do if a fault occurs .............................................................................................9
Protective anode .......................................................................................................................................................9
Overheat protection electric element .........................................................................................................................9
Emergency operation ................................................................................................................................................9
Technical information ..................................................................................................10
Technical information ............................................................................................................................................ 10
Sensor table ..................................................................................................................................................... 10
4
Important information
Electric boiler IVT 290 A/W belongs to the latest family of heating
products from IVT Industries. In heat pump systems with Optima 600, 900
and 1100, 290 A/W is used as electrical additional heat and for production
of hot water.
The electric boiler is available in two versions, 9 kW or 13.5 kW.
The heat pump system is controlled by a Rego 800 control unit, which is
in 290 A/W. The control unit controls and monitors the total system using
different settings for heating, hot water, other operations and maintenance.
The settings are made by the installer and the user via a control panel.
This guide contains a description of 290 A/W, what it consists of, maintenance, etc. The control unit and settings for Optima with 290 A/W are
described in the Optima guide. It is important, as the user, that you read
through the Optima guide.
Important information for the user
Note
For a comprehensive understanding
please read the Guide for Optima 600-
1700. There the Rego 800 monitoring
and control system is fully described.
For the user
Only a trained and qualiÞ ed technician may carry out repairs to this machine. Incorrect repairs
can lead to serious risks to the user, and a reduction in savings.
Visits from an authorised Service representative to make corrections or adjustments after such
a repair, cannot in such cases be carried out free of charge, not even during the warranty period.
Note
5
General
Electric boiler IVT 290 A/W can be used free-standing or together with air/water heat pump IVT
Optima 600-1100, which forms a complete solution for both heating and hot water. The hot water
heater is in the electric boiler and is stainless steel. The hot water heater has a protective anode that
is maintenance free and is suitable for all types of water.
The electric boiler is installed indoors and the heat pump is installed outdoors. The heat pump
collects energy from outside air. The energy is transferred via heated water to the electric boiler
for further transfer out into the house’s heating system (radiators and/or underfl oor coils) and for
heating the hot water.
The Rego 800 control unit, in the electric boiler, controls and monitors the whole installation. It
contains a control panel with graphic presentation. Most settings needed to give the installation the
best possible function in your house, are made via the control panel by the installer (or are preset in
the factory). In addition, you can affect operation in different ways, for example, by increasing/decreasing the heating, obtaining extra hot water etc., using the control panel.
There are a number of sensors in the system to assist adjusting heating and hot water production for
different demands. These give the control unit information about for instance the current outdoor
temperature and hot water temperature.
The unit can be supplied with a power guard (option). The task of the power guard is to temporarily
disconnect the electrical additional heat when using other power demanding appliances so that the
main fuse does not blow.
Control unit with
control panel
Electric boiler 290 A/W
(placed indoors)
Optima heat pump
(placed outdoors)
General
Power guard, option
(placed indoors)
6
This is how your electric boiler works
The electric boiler produces hot water and additional heating
The electric boiler produces hot water and heating, (additional heat together with Optima)
The electric boiler contains a double shelled hot water heater. There is an electric element which
heats the water in the heating water (outer shell).
The system heats the hot water based on information from a sensor in the hot water heater and
the settings in the control unit. The electric element is also used to produce extra high hot water
temperature, which is reached via a hot water peak.
This is how your electric boiler works
Outline drawing Optima and 290 A/W
Principles in different demand situations
Optima produces heat and there is no hot water requirement:
Optima heats the heating water according to the fl ow sensor (T1) and
the temperature settings in the control unit. The heating water is fed
through 290 A/W without passing through the hot water heater.
Optima produces heat and there is a hot water requirement:
In this case, the hot water sensor (T3) indicates that the hot water
needs heating. The heating water from Optima passes through the hot
water cylinder’s outer shell and heats up the hot water until the hot
water requirement is met. While it is doing so, no heat is produced.
The switch between heating and hot water production occurs automatically at a certain time inter val.
Optima needs additional heat in order to satisfy a heating
requirement:
In this case, the electric element heats the heating water in the outer
shell of the hot water heater. This heating water is fed into the heating
system in suitable amounts thereby increasing the fl ow temperature.
Extra hot water and hot water peaks:
When these requirements must be met, the control unit ensures that
hot water is fi rst heated by the compressor together with the electric
element, then only by the electric element until demand is met.
At outdoor temperatures lower than approx -20ºC:
In the event of too low an outdoor temperature, the compressor stops
and all heating of heating water and hot water occurs via an electric
element in 290 A/W. The outdoor temperature is displayed via the
outdoor sensor (T2)
Summer season:
In this case, there is no heat production and the compressor is idle.
When a hot water requirement occurs, the compressor starts and
meets the demand. Extra hot water and hot water peaks function as
described previously.
3-way
valve
Mixing
valve
3-way
valve
Hot water
Flow
Outdoor
sensor
Electric
element
Hot water
Heating
water
Heating water
Compressor
7
290 A/W (Stand Alone)
Hot water production
The electric element keeps the water heater hot via the sensor for hot water
(T3), which is on the heater’s outer shell.
Heat production
In the event of a heat demand, the shunt valve opens under the water heater
and releases heat to the radiator system. The temperature of the radiator
system is regulated via the fl ow line sensor (T1) and the heating settings in
the control unit.
Extra hot water and hot water peaks
The electric element ensures an increase of the temperature in the water
heater so that the desired demand is met.
3-way
valve
Mixing
valve
3-way
valve
Hot water
Flow
Electric
element
Hot water
Heating water
Heating water
290 A/W stand-alone
Outline diagram 290 A/W stand-alone
8
Component parts
IVT 290 A/W
The picture shows the electric boiler with the front panel removed.
See also Maintenance.
Component parts
Connecting area
The necessary connections of water for
heating, hot water, as well as inlet and
outlet to/from Optima are made here. In
addition, there are 3-way valves, mixing
valves etc.
Hot water heater
The water heater is double-
shelled and stainless steel.
It holds 160 litres of water.
Control panel with
graphic display
Electric box with circuit
boards and electric element
LED protective anode
Overheat protection
electric element
Heat carrier pump G2
Expansion tank
The tank can hold 12 litres.
Pressure gauge
Pump for heating system G1
Emergency operation
9
Maintenance
Check the pressure gauge
(Twice a year)
The pressure gauge in the lower section of the electric boiler must be
checked twice a year. This is particularly important during autumn when
the heating season starts. The pressure gauge should be at 0.5 – 1.5 bar. If
the pressure is lower than 0.5 bar, fi ll with water up to around 1.0 bar. The
knob for topping up the heating water is located in the connection area.
Clean the discharge water vessel
(Twice a year)
Wash the discharge water vessel with warm water and anti-bacterial
cleaning agent to remove dirt and algae. Rinse and check that the water
runs off through the hose.
Check the safety valves
(Twice a year)
Check the safety valves for tap water and heating water by opening and
closing them using the valve knobs.
Water may drip from the escape pipe, this is normal. The pipe opening must
never be sealed.
If the hot water heater must be drained, call a service engineer.
Maintenance
Filling
heating
water
Pressure
gauge
Discharge water vessel Safety valve tap water
10
What to do if a fault occurs
Example of an alarm:
When an alarm is triggered, an alarm window is displayed and a warning signal
sounds. The alarm window displays the alarm causes and the time and date that
the alarm occurred.
When you press the menu dial, Acknowledge is marked, the alarm symbol goes
out in the menu window and in the alarm log and the warning signal is muted.
The heat pump starts again within 15 minutes if heating is required. If the fault
has not been rectifi ed the lamp will remain lit and the status lamp will stop
fl ashing red and will light red continuously. Should several alarms have occurred
on the heat pump, view the alarm log where all alarms are counted. For active
alarms, the alarm symbol lights.
Protective anode
At the top of the hot water cylinder, under the insulation, there is an electronic
protective anode. Its purpose is to prevent corrosion. The cylinder must be fi lled
with water for the anode to work. There is a LED in the electric box that shows
a red or a green light. If green, the protective anode is operating and working
normally.
Should large amounts of hot water be drawn off (when fi lling a bath for instance)
the diode lamp may show a red light for a short time even though there is no
fault. If the lamp shows red for more than 10 hours, the anode is faulty and a
service engineer must be called. You can wait until the next working day if the
fault occurs on a holiday.
Overheat protection electric element
The button for resetting the electric element overheat protection is on the front
of the electric box. This is a protection device that should normally not trip. If,
however, it does trip, reset it by pressing in the button fi rmly. If the overheat
protection device trips frequently, call a service engineer to establish the cause.
Emergency operation
There is a switch on the top of the electric box that shows a green light in
normal operation. If a fault occurs in the control unit and heat production stops,
emergency operation can be activated manually using the switch, which then
goes out. Emergency operation can also be activated automatically (and then the
switch continues to be lit).
The additional heat takes over the heat production during emergency operation.
Heating can therefore be obtained until the dealer or authorised service technician has remedied the fault.
This function must not be confused with Alarm mode, which means that the compressor stops, for safety, due to an active alarm. Heat production is still controlled
by the control unit.
Overheat pro-
tection electric
element
LED protec-
tive anode
Safety valve
heating water
Hot water
heater
Emergency
operation
Maintenance
The control unit has an advanced monitoring system that gives alarms if anything unforeseen happens in
the system. Most alarms correct themselves. There is never a risk of affecting something when you reset
an alarm once or twice. In the event of recurring alarms, contact your dealership/service technician.
This is described further in the Optima guide and also describes what actions you can take.
Date when
the alarm
occurred
Alarm cause
Time when the alarm occurred
Alarm symbol
If you deactivated the alarm buzzer
under Advanced no warning signal is
heard.
Note
11
Technical information
Technical information
Sensor table
The table shows all sensor resistance
at different temperatures.
Technical information
Temperature (ºC) kΩ
-40 154.300
-35 111.700
-30 81.700
-25 60.400
-20 45.100
-15 33.950
-10 25.800
-5 19.770
0 15.280
5 11.900
10 9.330
15 7.370
20 5.870
25 4.700
30 3.790
35 3.070
40 2.510
45 2.055
50 1.696
55 1.405
60 1.170
65 0.980
70 0.824
75 0.696
80 0.590
85 0.503
90 0.430
IVT 290 A/W
Output electric element kW 9/13.5
Output circulation pump kW 0.2
Electrical supply 400V 3N~ 50Hz
Max. power consumption kW 9.2/13.7
Fuse size AT 16/25
Max. working pressure bar (MPa) 2.5 (0.25)
Hot water heater volume l 163
Expansion tank l 12
Overheat protection ºC 90
Min. fl ow heating system l/s 0
Pump for heating system G1 Wilo Star RS 25/6-3
Heat carrier pump G2 Wilo Star RS 25/6-3
Dimensions (WxDxH) mm 600x615x1660
Weight, excluding water kg 122
Weight, including water kg 347
IVT Industrier AB, Sweden
www.ivt.se | mailbox@ivt.se
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