Technical data

16
Parameter Description Range
1
2
3
4
N/A
N/A
Heating mode
Heating outlet temperature
N/A
N/A
00 = off
01 = on
03 = off
(pump on continuously)
04 = on
(pump on continuously)
20 °C - 90 °C
5.1 GAS SUPPLY INSTALLATION
Inspect the entire installation including the gas
meter, test for soundness and purge.
5.2 THE HEATING SYSTEM
The appliance contains components that may
become damaged or rendered inoperable by oils
and/or debris that are residual from the installation
of the system, consequently it is essential that the
system be flushed in accordance with the following
instructions.
5.3 INITIAL FILLING OF THE SYSTEM
5.3.1. Ensure both flow and return service valves are
open, identify the automatic air release valve (fig.
12) and loosen the dust cap by turning the cap
anti-clockwise one full turn.
5.3.2. IMPORTANT, THERE ARE NO MANUAL AIR
RELEASE VALVES LOCATED ON THE
APPLIANCE. Ensure all manual air release valves
located on the heating system are closed.
5.3.3. Using the method of filling as described in fig. 5,
slowly proceed to fill the system. As water enters
the system the pressure gauge will begin to rise.
Once the gauge has reached 1 bar close the
filling valve and begin venting all manual air
release valves, starting at the lowest first. It may
be necessary to go back and top-up the pressure
until the entire system has been filled. Inspect the
system for water soundness, rectifying any leaks.
5.4 INITIAL FLUSHING OF THE SYSTEM
The whole of the heating system must be flushed
both cold and hot as detailed in section 5.8. Open
all radiator or heating valves and the appliance
flow & return service valves. Drain the boiler and
system from the lowest points. Open the drain
valve full bore to remove any installation debris
from the boiler prior to lighting. Refill the boiler
and heating system as described in section 5.3.
5.5 PRE-OPERATION CHECKS
Before attempting the initial lighting of the appliance,
the following checks must be carried out:
● ensure all gas service valves from the meter to
the appliance are open and the supply pipe has
been properly purged;
● ensure the proper electrical checks have been
carried out, (see section 7.7) particularly
continuity, polarity, and resistance to earth;
● ensure the 3 amp fuse – supplied with the
appliance – has been fitted;
● ensure the system has been filled, vented, and
the pressure set to 1 bar;
● ensure the flue system has been fitted properly
and in accordance with the instructions;
● ensure all appliance service valves are open.
5.6 INITIAL LIGHTING
Ensure the electrical supply to the appliance is
switched on. Switch the time clock or programmer
to an ‘on’ position and ensure all external controls
are also calling for heat.
The appliance will operate in the central heating
mode as described in section 1.3. Should the
appliance fail to ignite, refer to section 5.6 and/or
section 7 (faultfinding).
5.7 FINAL FLUSHING OF THE HEATING SYSTEM
The system shall be flushed in accordance with
BS 7593. If a cleanser is to be used, it shall be
from a reputable manufacturer* and shall be
administered in strict accordance with the
manufacturers instructions.
*Both Sentinel and Fernox manufacture products
that have proved suitable for use with Vokera
appliances. Vokera Ltd. cannot comment on the
suitability of any other such product with our
appliances.
5.8 INHIBITORS
See Section 3 “General Requirements”.
5.9 APPLIANCE OPERATING PARAMETERS
The appliance is supplied with pre-set operating
parameters. Parameters 3 & 4 can be adjusted at
any time, however the remaining parameters (5 –
42) can only be accessed after entering the
relevant service code, and should only be adjusted
by qualified service personnel.
5.10 PARAMETERS 3 & 4
Parameters 3 & 4, are used to alter or adjust the
operating mode and flow temperature. Use the
following table and procedure to check or adjust
the relevant parameters:
● Press the
mode
button until “PARA” appears
in the display.
● Press the
S
button until the appropriate
parameter is shown in the left side of the
display.
● Use the
+
or
-
buttons to adjust the value
of the paramater as shown in the right side of
the display.
● Press the
M
button to store the new setting.
● Press the
reset
button to return to the
stand-by mode.
IMPORTANT
Under no circumstances should any parameters
- other than those shown above - be changed or
adjusted by non competent personnel.
5.11 INFORMATION MODE
The appliance keypad can be used to display
certain information on the working status of the
boiler. Information such as flow & return
temperature, and temperature rise can be viewed
using the following table and procedure:
SECTION 5 COMMISSIONING