Hoval CombiVal WP-VT (2141) Operating Instructions Manual

4 209 973 / 00 - 10/10

Water heater - heat pump
CombiVal WP-VT (2141)

EN

Subject to modifi cations

Operating Instructions

Hoval United Kingdom

Hoval LTD
Northgate
Newark
Nottinghamshire NG24 1JN
Phone: [phone]
Fax: [phone]

Hoval Export

Hovalwerk AG
Austrasse 70
9490 Vaduz
Principality of Liechtenstein
Phone: [phone]
Fax: [phone]

2

4 209 973 / 00

Summary of contents

Heating engineer _____________________________________

_____________________________________

_____________________________________

Tel. No. _______________________________

Plumber _____________________________________

_____________________________________

_____________________________________

Tel. No. _______________________________

Electrician _____________________________________

_____________________________________

_____________________________________

Tel. No. _______________________________

Important addresses

Important addresses .................................................................................................................................. 2

Safety Instructions ................................................................................................................................... 3

Product Description and Mode of Operation ........................................................................................... 4

Fault Indicator ............................................................................................................................................. 7

Fault investigation ...................................................................................................................................... 8

Operation/ Maintenance/ Service .............................................................................................................. 9

3

4 209 973 / 00 Safety instructions

Dear Hoval customer,

In the Hoval water heater / heat
pump you have purchased a product
that is built to the highest possible
quality standards using state of the

art technology.

• Please check the items delivered,

to ensure that they are complete
and match your order. Inspect
for any transport damage that

may have occurred, if necessary

re-porting it to your Installer or
nearest Customer Service Centre.
Complaints made later cannot be
accepted due to insurance ar­rangements.

• For a correct installation, pay at­tention to laws currently in force,

plus any regulations and stan-

dards, in particular regulations laid

down by the relevant utility compa­ny. In case of queries, please con­sult your installer or your nearest
Hoval Customer Ser-vice Centre.

• Before start-up, the installation

must be inspected and released
for use by the installer.

• To ensure safe, economical and
trouble free operation, only use

your Hoval heat pump in accor­dance with these operating instruc­tions.

• The heat pump may only be used

for those purposes for which it is
built, and for which it has been ap­proved by Hoval.

• Do not make any modications to
the equipment, as this will result in

invalidating all legal claims. Con-

version kits must be installed by,
and obtained from, the licensed

installer or Hoval Customer Ser­vices.

• In the event of damage or mal­function, find out about the repairs
required from Hoval Customer
Services. To prevent any damage,
it is essential that the equipment
be turned off.

With the purchase of a Hoval prod­uct you also have the protection of a
comprehensive warranty, in accord­ance with our terms of sales and
warranty.

With proper use, the ownership of

your Hoval water heater/ heat pump

will be a pleasure, and above all

will provide you with a reliable and
economical source of hot water.

Safety Instructions

Installation and service work on heat
pumps be dangerous, on account of
high pressures, live parts and the

location of the installation.

Heat pumps may only be installed,

put into operation or maintained by

trained, qualied service staff.

When working on this equipment,

attention must be paid to all safety
instructions in the relevant docu-

ments, on stickers or plates on the

equipment itself and all other safety
precautions in force.

Caution

Before carrying out maintenance
and service work, always pull the

equipment’s plug out of the mains.

4

4 209 973 / 00

Product Description and Mode of Operation

Product Description and Mode of Operation

Corrosion protection

The hot water reservoir is provided
with a double enamel coating. The
reservoir coating is intended for

use with normal drinking water. No
guarantees can be given if drinking

water of above average aggressivity
is used.

The protective anode should be

checked regularly and if necessary
exchanged by your installer or by
Hoval Customer Service. This is a

condition of the guarantee (fig. 1).

The magnesium protective anode
must under all circumstances be
renewed if the diameter is down
to only 10 mm!

Fig 1

Protective anode(a)

a

b

A

A

c

5

4 209 973 / 00 Oparation

CombiVal WP-VT (2141)

(Electronic control)

Operation

1 Operation and fault display for

heat pump. Green = operation,
Orange = standby, Red = fault

2 Operation and fault display for ad­ ditional heating (boiler or immer-

sion heater). Green = operation,
Orange = standby, Red = default
3 Display

4 On/off switch

General remarks

The elecronic control has 2 program
levels:

• Mainmenu(userlevel)

• Servicemenu(specialistlevel)

In operation, the main menu is dis­played as standard. In the user level,

the functions can be read off the dis­play (3) (as above, plus status or set­tings below). The display is activated
by turning or pressing the program

switch (4), causing it to illuminate.

Operation knob

• Turn = Selection of

function or value

• Press =

1. Short press: a flashing

line/number = the setting can
be changed. If the change is

not acknowledged by pressing
again briey, the change does
not take effect

2. Long press (> 3 Sec.) =

change to service menu

12 types of information or functions
are available:

Display

Actual value display

1. Actual hot water temperatur

Displays current value

2. Evaporator temperature

Alarm / Fault code

0= no faults
1-10 = see page 19
Acknowledge =
Press

3. Alarm / fault

Heat pump in hot water
mode

Further data:

• Off

• Standby

• Legionella = heating up

to 65°C in operation
De-icing mode:

• De-icing gas

• De-icing air

• De-icing off

• De-icing stop

4. Operating status data

5. Target temperature of hot water

Set-point

Target hot water temperature

Flashing !

Setpoint

45°C

3. Press knob
= acknowledge

(the new set temperature is
now effective!)
The setting should be bet­ ween 45°C and 55°C!

2. Turn knob until the

desired hot water
temperature is
set (e.g. 50°C)

6. Min. hot water temperature

The set hot water temperature can
be changed as follows:

1. Press knob

Target-Minimum-Temperature
This is set in the same way-

see Point 5., hot water tem­perature. If the temperature
falls below this, the addi­tional heating selected in the
operating mode switches
(Point 7) in.

Heat pump and additional
heating by the immersion

heater are enabled. Further

choices of operating mode
available*:

• Off

• WP = only heat pump

• E L = only immersion hea-

ter

• Kessel = only boiler

• WP+ Kes. = heat pump and

boiler
* only set the combination
installed

7. Operating mode

8. Protection against Legionella

• Ein = the hot water temperature
is raised to 65°C weekly

• Aus = no protection

Setpoint

45°C

Status

W.Water

Water

45°C

Evaporator

5°C

Alarm

0 0 0

Setpoint

50°C

T min

35°C

W.Pump

WP+ EL

Legionel

Ein

User level (main menu)

Main menu

Control panel

1 2 3 4

6

4 209 973 / 00

Oparation

Version

1. Program variants (Software)

De-icing method

2. Type of de-icing operation

• Gas = hot gas bypass

de-icing = Standard for type
VT-(157-E)

• Air = not relevant*

• Above 8°C = not relevant*

* Use forbidden!

3. Maximum operating temperature
(hot water)

4. Anode condition

Displays the condition of the

magnesium protection

Specialist level (Service menu)

Mode display
This function is intended for
separate ventilation of the
heat pump with the fan in
standby mode:

1 = Fan stage 1

(lower airflow)

2 = Fan stage 2

(higher air flow)
0 = No separate ventilation

function for the fan. Fan

only to be used when
heat pump operating!

9. Separate fan function

VenKon

1

10. Select fan stage

VenBetr

2

1 = Stage 1 = lower speed /
airflow
2 = Stage 2 = higher speed
/ airflow

11. Protective anode display

Anode

Auto

Status-display

Auto = signal anode present
(alarm when exchange need­ed)
Manual = no signal anode.

Periodic checks: see page 6

12. Sensor temperature

Temp 1

-20°C

Status/Value display

• -20°C = no sensor connected

• Display of the actual tempera ­ ture, if an additional sensor is

attached (e.g. boiler water or
outside temperature etc.).
Temperature range from -20°C
to 100°C.

Software

1.11

Sevicemenu

De-icing

Gas

T max

55°C

Setting the maximum value

Caution!
The set target temperature
value 55°C = maximum hot
water temperature that can
be set (set point). Range of
adjustment: 5°C-62°C

Anode

-20°C

Only an expert is al­lowed to change the
settings!

• -20°C = anode is intact (OK.)

• Caution! The anode condition is

only displayed if a signal anode is
installed.

Functional Characteristics

of the controls on the WP-VT (2141)

Water heating mode

Depending on the settings, heating up

the water heater is carried out by the

pump, and/or electrical heating and/

or the boiler. The function of the water
heating operation is controlled by the
user program. heat pump: operational­status W.Wasser. Temperature control:
by sensors ((Tmax=set point and Tmin).
The heat pump is switched on if the
temperature falls below the set value is
reached. If the heat pump is switched
off, the target temperature of the heat­ing water is reached with the additional

heating selected (Hysteresis: WP +1/­3K; additional heating system +/-1K).

The heat pump is switched off automati-

cally, if the temperature at the evapora­tor unit falls below - 18°C. The operating

conditions are displayed in the control

panel. (See page 5: Display 3 )

De-icing mode

De-icing (by hot gas bypass) occurs
automatically as required. De-icing
with the de-icing value starts (fan off),

if the temperature at the evaporator

unit is <- 2°C. De-icing is terminated, if

the temperature of the de-icing sensor

reaches a value of + 5°C. If this value is
not reached within 20 minutes, de-icing

is stopped and the normal operation
is resumed. The de-icing interval is 2
hours.

Legionella protection

if in general little water is required (too
long a dwell time for the water in the

water heater), is it recommended that

the Legionella protection function be
activated. If the function is activated
(see user program) the water is peri-

odically heated to 65°C. First the water

is heated to 55°C by the heat pump

(time - max. 7 hrs), then together with

the additional heating (if switched on)
to 65°C. If the protection temperature

of 65°C is not reached within 12 hours,

an alarm is displayed. The Legionella
time sequence is 168 h (7 days), re­peating itself periodically as long as
the function remains activated.

Important!
The status/mode setting and/or the
control‘s set values should not be
changed. In particular the settings
in the service menu (specialist level)
may not be changed.

7

4 209 973 / 00 Fault Indicator Type WP-VT (2141)

Alarm Display ashing Meaning Effect/action

1 2

• No 1 red red Temperature sensor in Heat pump and additional

the upper tank - heating is shut down.

• No 2 red red faulty or defective Inform service.

• No 3 red - Temperature sensor in Compressor not running.

evaporator
Inform service.

• No 4 red - Faulty or defective Replace defective sensor.

• No 5 red - 1. Pressure switch alarm compressor shuts down and

(High-pressure fault) restarts automatically. Eliminate
fault / inform service. maybe

Acknowledge (see page 5)

• No 6 red - 2. Pressure switch alarm and acknowledge in user menu

(high-pressure fault) It is essential to inform service

• No 7 red - For information: not relevant

(inactive)

• No 8 red - Temperature sensor Information:

„Temp 1“ Inform service. Replace
faulty or defective defective sensor.
(Service-Program)

• No 9 red - Protective magnesium Information:

anode exhausted Install new protective anode.
Inform service.

• No 10 red - Legionella temperature Information :

not reached Check settings.

Inform service.

Alarm overview / fault overview

Alarm/fault overview WP-VT

Alarms and faults can be seen in the user level (alarm mode) and acknowledged.
If the error is not eliminated, then, even if acknowledged, the alarm display remains. If several alarms/faults arise,

they are placed in sequence and shown as a priority list. The alarms/faults are divided into 3 groups (alarm levels).

Alarm group Alarm-No Status/Effect Remarks/Action

1 General equipment alarm 1 and 2 Equipment is turned off/ No hot water/ see table
no operation possible below

2 Working uid circulation 3, 4, 5 Heat pump is shut down/ Hot water with additional heating,

Alarm (heat pump) and 6 operation only possible switch on additional heating/ see
with additional heating. table below

3 Information 6, 7, 8 Operation remains irregularities in operation/

9 and 10 possible/ the displayed see table below
alarms must be
eliminated soon

1 Heat pump operation and fault

display. Flashing red = fault in

alarm group 2 or 3

2. Additional heating operation and
fault display (boiler or immersion
heater)

If both displays (1+2) are flashing
red = fault in alarm group 1

3 Display

Alarm

9 0 0

Acknowledge =
press knob

Control Panel

1 2 3

Fault Indicator

8

4 209 973 / 00

Fault investigation

The inlet and outlet screens and the evaporator must be checked for
dirt regularly, and cleaned when necessary.

Corrective action

• See fault display

• Replace fuse

• Switch on main switch

• Reset safety thermostat

• Replace

• Replace

• Replace

• Turn on

• Check standby, replace

• See fault display

• Clean

• Install

• Fill

Cause

• See fault display

• No power to the plug

• Main switch switched off

• Overheating

• Electrical connection defective

• Electrical connection defective

• Pump defective

• Pump blocked

• Boiler not in standby position

• High-pressure fault

• Condensate drainage blocked

• No drainage siphon installed

• No water in drainage siphon

Fault

Alarm signal in display

Electrical fault
no display

Electrical heating does not heat

up, although switched on

Additional heating does not heat up,

although it is switched on

Fault No. 5 or 6

Condensate leak during operation

Smell

You can minimise the risk of a fault

occurring by signing up to a service
contract. If despite this something

goes wrong, go through the

fault checklist. Make sure that you

have adhered to the instructions in
the manual. If nevertheless

the fault cannot be eliminated,

please contact your Hoval
customer service.

Typ CombiVal WP-VT (2141)

Fault investigation

9

4 209 973 / 00 Operation/ Maintenance/ Service

Is your heating and hot
water plant working reli­ably and economically
over the long run?
Regular maintenance
and ongoing checks
and care of all important
components ensure it
stays that way!

Work described in the op­erating instructions should
be carried out from start

up onwards, not just after

the warranty has expired.
Your installer will gladly advise you.
Hoval service is recommended for the

following tasks, either as one-off orders
or as part of a service contract: Check­ing the heat pump, the water heater, the
boiler, the regulators and the circulation

pump

Hoval service specialists are properly
equipped and can offer you a reliable
service.

If you want to place an order, please call
the regional service manager; he co-op-

erates closely with local service special-

ists. This enables us to visit you quickly.
If you cannot keep the heating working
properly by making manual adjustments,

we are will be with you within hours. In

all other cases we will visit within ve
working days (see also page 3).

The invoice is calculated on the basis
of materials used and labour time, while
our maintenance work is carried out at
reasonable flat rates.

Travelling and labour are charged ac­cording to the guidelines laid down by
the professional associations. When

placing your order, ask the manager for

a verbal guideline offer for material and
labor costs.

Operation and maintenance

To ensure problem free operation, a
yearly check should be carried out.

General checks

To detect possible irregularities in its

operation, the heat pump should be
checked out at regular intervals.

• Keep the housing of the equipment
clean, and the area around it.

• I Regularly wipe the installation with a
damp cloth, to remove dust and dirt.
This makes it easier to nd any leaks
early on, so they can be repaired.

• From time to time check all connec-

tions to ensure they are tight.

• From time to time check to ensure that

the operating voltage and phase ir-

regularity remains within the specied

limits.

• Performance monitoring

The temperature difference between
the inlet air and exhaust air should be
approximately 5-7K. Greater tempera­ture differences point towards prob-

lems in air throughput (check both inlet
and exhaust air ow), whereas differ­ences smaller than 4K indicate that the

heat pump is not functioning correctly
(inform customer service)

Important

The hot water tank is equipped with a

double enamelled wall. The coating of
the reservoir is designed for normal

drinking water quality. If drinking water of

above average aggressivity is used with­out any special protection measures be-

ing taken, no guarantees can be given.

The protective anode should be
regularly checked and if neces­sary exchanged by your installer or
Hoval customer service. This is a
condition of the guarantee.

In hard water areas (over 16° dH or 28°
fH), every two or three years a check
should be carried out. Ask your heating

specialist or Hoval customer service.

Cleaning the air duct

• Take care to ensure that the air inlet

and exhaust openings are free and not

blocked by objects or dirt.

• Protective grilles and air lters should
also be checked for their cleanliness.

This also applies any air ducts present.

Service

Important

When any work is being caried out on
the equipment, the mains plug should be

pulled out

Shut

The heat pump can be shut down
by switching off the water heating
heat pump on the control panel (see
Operation).

?

• The inlet and outlet screens and the

evaporator must be checked for dirt
regularly, and cleaned when neces-

sary. (See picture below.) The top
cover can be removed to clean the
evaporator.

Caution! Unplug the power cord be-

fore opening

evaporator

Working fluid (refrigerant) circulat

Work on the internal circulation of the

heat pump (compressor, condenser,
evaporator, expansion valve etc.,inclu­ding the circulation pipe work) may

only be carried out by authorised
persons

Bern

Feldmeilen

Crissiere

Manno

Basel/Füllinsdorf

Vaduz

Operation/ Maintenance/ Service

Responsibility for Energy and Environment

United Kingdom

Hoval LTD

Northgate

Newark

Nottinghamshire NG24 1JN

Phone [phone]
Fax [phone]
www.hoval.co.uk

Switzerland

Hoval Herzog AG

General-Wille-Strasse 201

CH-8706 Feldmeilen
Phone [phone]
Fax [phone]

www.hoval.ch

Germany

Hoval (Deutschland) GmbH

Karl-Hammerschmidt Strasse 45
D-85609 Aschheim-Dornach
Phone [phone]
Fax [phone]

www.hoval.de

Austria

Hoval Gesellschaft mbH

Hovalstrasse 11

A-4614 Marchtrenk
Phone [phone] - 0
Fax [phone] - 5005

www.hoval.at

Italy

Hoval Italia S.r.l.

Via per Azzano San Paolo, 26/28
I-24050 Grassobbio (BG)
Phone [phone]
Fax [phone]

www.hoval.it

France

Hoval France SAS

6, rue des Bouleaux
F-67100 Strasbourg
Phone [phone]
Fax [phone]

www.hoval.fr