VOKERA Mynute EHE Installation & Servicing Instructions Manual - page 17
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FOR SOUNDNESS.
●
ENSURE THE APPLIANCE FLUE SYSTEM IS FITTED
CORRECTLY AND IS PROPERLY SECURED.
●
ENSURE ALL PIPE WORK IS RE-CHECKED FOR
SOUNDNESS.
●
RE-FIT APPLIANCE CASING.
●
COMPLETE BENCHMARK CHECKLIST.
Complete details of the boiler, controls, installation, and com-
missioning in the Benchmark checklist at the back of this
book. It is important that the Benchmark checklist is correctly
completed and handed to the user. Failure to install and
commission the appliance to the manufacturers instructions
may invalidate the warranty.
5.13
INSTRUCTING THE USER
Hand over all documentation supplied with this appliance
- including these instructions - and explain the importance
of keeping them in a safe place.
Explain to the user how to isolate the appliance from the
gas, water, and electricity supplies, and the locations of all
drain points.
Show the user how to operate the appliance and any
associated controls correctly.
Show the user the location of the filling valve and how to top-
up the system pressure correctly, and show the location of
all manual air release points.
Explain to the user how to turn off the appliance for both long
and short periods and advise on the necessary precau-
tions to prevent frost damage.
Explain to the user that for continued safe and efficient
operation, the appliance must be serviced annually by a
competent person.
6.1
GENERAL
To ensure the continued safe and efficient operation of the
appliance, it is recommended that it is checked and serv-
iced at regular intervals.
To ensure correct and safe operation of the appliance, it is
essential that any worn or failed component be replaced
only with a genuine Vokera spare part.
The frequency of servicing will depend upon the particular
installation conditions, but in general, once per year should
be adequate.
It is the law that any servicing work is carried out by a
competent person such as a Vokera engineer, an ap-
proved service agent, Bord Gais (ROI), British Gas, CORGI
registered engineer/installer, or other suitably qualified/
recognised person.
The following instructions apply to the appliance and its
controls, but it should be remembered that the central
heating and the domestic hot water systems would also
require attention from time to time.
6.2
ROUTINE ANNUAL SERVICING
Check the operation of the appliance and ensure it func-
tions as described in section 7. Compare the performance
of the appliance with its design specification. The cause of
any noticeable deterioration should be identified and rec-
tified without delay.
Thoroughly inspect the appliance for signs of damage or
deterioration especially the flue system and the electrical
apparatus.
Check and adjust - if necessary - all burner pressure
settings (see section 7.3).
Check and adjust - if necessary - the system design
pressure (see section 5.10).
Carry out an analysis of the flue gases (see 7.4) and visually
check the condition of the entire flue assembly. Compare
the results with the appliance design specification. Any
deterioration in performance must be identified and recti-
fied without delay.
Ensure both flue venturis are clean and free from any debris
or obstruction.
Ensure the burner, main heat exchanger and latent heat
collector are clean and free from any debris or obstruction.
6.3
REPLACEMENT OF COMPONENTS
Although it is anticipated that this appliance will give years
of reliable, trouble free service, the life span of components
will be determined by factors such as operating conditions
and usage. Should the appliance develop a fault, the fault
finding section will assist in determining which component
is malfunctioning.
6.4
COMPONENT REMOVAL PROCEDURE
To remove a component, access to the interior of the
appliance is essential. Isolate the appliance from the
electrical supply and remove the fuse. And when neces-
sary, close all service valves on the appliance, remove the
appliance casing as described in section 4.7.1, and drain
the water content from the appliance via the drain valve
located at the front of the hydraulic section using the tube
provided. Ensure some water absorbent cloths are avail-
able to catch any residual water that may drip from the
appliance or removed component. Undertake a complete
commissioning check as detailed in section 5, after replac-
ing any component.
ALWAYS TEST FOR GAS SOUND-
NESS IF ANY GAS CARRYING COMPONENTS HAVE
BEEN REMOVED OR DISTURBED.
6.5
PUMP ASSEMBLY (fig. 17)
Carry out component removal procedure as described in
6.4.
The pump head can be replaced by disconnecting the
electrical connection at the pump and removing the 4-Allen
screws that secure the head to the pump base. Alterna-
tively, the complete pump assembly can be removed as
follows:
●
disconnect the electrical connection from the pump
control box
●
locate and remove the pressure gauge securing pin and
disconnect the pressure gauge from the pump assembly
●
locate and remove the expansion pipe securing pin and
disconnect the expansion pipe from the pump assembly
●
locate and remove the condense pipe located between
the air-chamber and condense trap
●
refer to fig. 17, disconnect and remove items A, B & C
●
locate and remove securing pin ‘F’ and lift the pump
assembly away from the hydraulic section.
Replace in the reverse order.
6.6
SAFETY VALVE (fig. 18)
Carry out component removal procedure as described in
6.4. Disconnect and remove, the safety valve outlet pipe.
Locate and remove the safety valve securing pin (
B
). The
safety valve can now be removed. Replace in the reverse
order.
B
A
C
G
F
Fig. 17
SECTION 6 SERVICING INSTRUCTIONS