Dimplex VFMQ 20, VFMQ 30, VFMQ 40, VFMQ 50, VFMQ 60 Installation And Operating Instructions Manual

Contents

Operating Instructions 2
Condition as Received, Installation 4
Device Installation 5
Electrical Connection 9
Technical Device Information 10
Warranty, After-Sales Service 11

VFMQ

ThermoComfort mechanic

Storage Heater

Installation and
Operating Instructions

English

459292.66.01 06/10/A

2

General Information

For installation, operation and maintenance, please observe
these instructions. This unit should only be installed and
repaired by an experienced technician.
Repairs which are improperly carried out can endanger the
safety of the user.

The installation and operating instructions must always be
available and should be given to the technician working on
the device for his/her information.

We therefore request that these installation and operating
instructions be passed on to the new tenant or owner should
there be a change in occupancy.

During renovation works with dust accumulation, the device
must only be operated with the fan switched off.

!Warnings!

• Note! The surface temperatures can exceed 176° F (80°
C) during operation.

• The minimum clearances indicated must be kept.
The clearances must not be reduced by hanging objects.

• Any objects must be at a distance of at least 12“ (300 mm)
from the air outlet grid. This is also true for deep-pile
carpet.

• Do not cover the device

• Covering the device with objects can lead to heat build-up
and thus increased temperatures on the device surface
and the objects.

• Do not insert any objects into the device or bring any
objects into contact with the device. This could lead to
malfunctions or the objects might ignite.

• Any objects which have fallen behind the storage heater
must be removed immediately.

• Ensure that small children or persons with impaired health
do not touch the device surface, especially the air outlet
grid.

• Care must be taken that no objects such as e.g. curtains,
paper, aerosol cans etc. are placed against, in front of or
on the device or directly in the path of hot air.

• Electric storage heaters must not be operated in rooms
with - even temporarily - potentially explosive substances
of any kind such as gases, vapours or dust. This is also
true for volatile solvents (such as Tri, Tetra). In such
cases, ensure that the storage heater has cooled down to
room temperature.

• Do not use steam cleaners to clean the storage heater.

• This device must not be operated by persons (including
children) with limited physical, sensory or mental abilities
or lacking the necessary experience or knowledge ­unless they are under the supervision of the person
responsible for their safety or have been instructed in the
use of the device.

• Children must be supervised to ensure that they do not
play with the device.

Function

During the night the storage heater stores the thermal energy
required for the day in the storage core. This way low-priced
electrical energy can be stored at times during which the
distribution networks of the utility companies are not working
under full load.

In some areas with very low external temperatures additional
thermal energy can be stored at specific times during the
day.

Even if additional storage takes place during the day,
however, most of the thermal energy required is still stored
during the night.

Occasional clicking sounds during operation are due to
temperature changes in the storage core.

Initial Heating Up

As with all new devices, some unpleasant odours may occur
during first use. Please ensure sufficient ventilation.

Charging with Charge Control

The charging of the storage heater is controlled via an
atmospherically-controlled charge control.

The thermal energy to be stored is determined using the
external temperature and the remaining thermal energy in
the storage heater.
In this operating mode, the charging adjuster at the storage
heater is set to maximum charging - clockwise to the right­hand stop. (factory setting).

Operating Instructions for Users English

3

Manual Charging (Manual Operation)

If the charging of the device is to be controlled manually, the
charging knob must be placed on the axis of the adjuster.
Remove the cap at the front panel of the storage heater.

The thermal energy to be stored can be set via the knob.
On extremely cold days choose setting III (right-hand stop),

with higher external temperatures choose a lower setting.
No charging takes place at the left-hand stop.

Room Temperature Control

The transfer of the thermal energy stored in the storage
heater is automatically controlled via the room temperature
controller. The desired temperature, e.g. 68° F (20 °C) is set
on a scale. Room temperature controllers can be either wall­mounted or integrated into the storage heater.

During the night or when a room is not used, the temperature
should be lowered by roughly 7° F (4° C).
A further lowering of the temperature is not recommended,
as this causes excessive cooling of the room's walls. In case
of changes of the temperature settings, it will take a while for
the room temperature to be reached. Therefore, the
temperature lowering must be cancelled some time (at least
one hour) before the room is to be used again. With many
controllers this can be carried out automatically with a
setback thermostat.

During longer absences frost protection must be taken into
consideration.

Maintenance

Occasional vacuum-cleaning in the area of the air outlet grid
and the lower slot rows of the right side panel is
recommended.

As part of the maintenance cycle, it is recommended to test
the correct functioning of the controlling and regulating
devices. This test must be carried out every 10 years at the
latest to prevent unnecessary energy consumption.

Temperature Management

Room Too Cold

• Check the breaker/fuses for the storage heaters in the
supply panel and, if necessary, replace or reactivate the
breaker/fuses.

• Charging adjuster at the storage heater set too low
(manual charging only). Correct setting.

• Incorrect room thermostat setting. Correct setting.

• The windows and doors are open and/or the neighbouring
rooms are not heated.

• Incorrect setting of the central charge control.
Correction according to the operating instructions of the
charge control.

Room Too Hot

• Check the breaker/fuse for the charge control in the
supply panel and, if necessary, replace or reactivate the
breaker/fuse.

• Charging adjuster at the storage heater set too high
(manual charging only). Correct setting.

• Incorrect room thermostat setting. Correct setting.

• Incorrect central charge control setting:
Correction according to the operating instructions of the
charge control.

If you cannot correct the fault, please contact an electrician
or your nearest after-sales service provider.

To process your order, we require the model number (E-No.)
and the data code (FD). This information is listed on the
rating plate.

Rating plate

Maximum charging No charging

Operating Instructions for Users English

4

Condition as Received

The casing, heating element set and storage bricks are
supplied in individual packaging.

- The heating element set comprises the following
components:

- 3 heating elements,

- 1 heating element rating label (not for VFMQ range),

- 1 charging knob,

- 1 screw, dowel, washer for tilt protection,

- 6 mounting screws for the wall spacers.

The wall spacers lie on top of the polystyrene frames of the
device packaging.

Please check the delivery for completeness. Complaints
about damage during transport are to be made according to
the instruction sheet. Minor damage to the storage bricks
does not affect device operation.

Installation

Storage heaters may not be used:

- In rooms with air that is potentially explosive,

- In rooms where corrosive air is to be expected.

The load-bearing capacity of the floor must be sufficient to
carry the weight of the heaters.

The installation surface must be smooth and level. The
devices can be installed on any conventional flooring,
however, the colour of PVC (linoleum) or parquet floor or
light-coloured carpeting can change in the area of the
supporting feet due to pressure and heat exposure. Wall or
carpet skirtings touching the rear panel of the device must be
removed.

Supporting boards (special accessories) must be
used:

- In case of heat-sensitive flooring, which cannot reliably
withstand temperatures of 80 °C.

- If it can be expected that the supporting feet may sink into
the flooring, so that the air exchange below the storage
heater is obstructed.

Condition as Received, Installation English

Dimensions of cable entry
Type Dimension A
VFMQ 20 24 5/8“ (626 mm)

VFMQ 30 30 1/2“ (776 mm)
VFMQ 40 36 1/2“ (926 mm)
VFMQ 50 42 3/8“ (1076 mm)
VFMQ 60 48 1/4“ (1226 mm)
VFMQ 70 54 1/4“ (1376 mm)