Technical staff manual
15
7.8
Installation of the appliance’s power elements
Power elements of the typical size D are installed into the battery section 13 (see. Scheme 10, Scheme 11, Scheme 12)
in accordance with polarity indicated on the inner side of the cover of the section. It is recommended to install the
alkaline power elements of the LR20 type, with higher energy output ratio providing more durable operation of the
appliance.
7.9
Checking the appliance
After installing the appliance and checking it on air-tightness, you must check: the operation of the ignition and
main burner (p. 4.1.2, 4.1.3, page 9), automatic safety devices operation (
п. 8.2.6, page 20), and the hot water’s
temperature and consumption. Switching the appliance on and off and regulation of its water temperature must be
effectuated in accordance with section 3 (page 7).
Note:
After keeping the appliance in a premise with sub-zero temperature, it is recommended to perform its first
launching not earlier than in 1,5 h after it was brought to a warm premise.
If necessary (in case of insufficient water heating) the appliance’s inlet gas pressure should be checked. In order
to measure gas pressure
, having previously closed the gas stop valve by the appliance’s inlet, it is necessary to
connect a manometer to the fitting 22 (Scheme 12)
Gas pressure measurement must be effectuated on the operating appliance and at maximum gas consumption.
Gas pressure must comply with the value indicated in the Acceptance certificate.
7.10 Rendering the appliance to another type and pressure of gas
7.10.1
Rendering the appliance to another type of pressure or gas must be done by a specialized service
organization. For rendering it is necessary to use only a branded set of details.
Before rendering it is necessary to switch the appliance off and close the gas stop valve.
7.10.2 In order to render the appliance to another type of gas or pressure it is necessary to replace the nozzles of the
main burner’s manifold and the nozzle of the ignition burner for the nozzles with an orifice diameter in
accordance with table 1 for the type and pressure of gas the appliance will operate on.
After rendering it is necessary to check the
joints’ air-tightness.
The type and pressure of gas the appliance has been rendered on, must be indicate in the Acceptance
certificate (indicating the organization that effectuated the rendering and the date of effectuation) and in the
table on the appliance.
8.
CONSTRUCTION AND OPERATION CONTROL OF THE APPLIANCE
8.1 Construction of the appliance
8.1.1
The wall-mounted appliance (see Scheme 1, Scheme 2 page.6) has a rectangular form formed by a
detachable casing 2.
8.1.2
The appliance
«NEVALUX-5514» has the following elements on its front side of the casing 2 (see Scheme 2
page 6.): gas consumption tap control knob 4, viewing window 3 for watching the ignition and main burner
s’
flames. All main elements of the appliance are mounted on its body frame 17 (see Scheme 12).
8.1.3
Function of the main units and components of appliance (see Scheme 10, 11, 12):
-
Gas removal device 1 is designed to remove the combustion products to the exhaust flue;
-
heat exchanger 2 provides transfer of the heat received at gas combustion to the water flowing through its
pipes;
-
Gas and water unit 12 is designed to control gas supply to the ignition and main burners, and consists of water
and gas units and the valve block
(the unit’s construction ensures gas supply to the ignition and main burner only
if there is water flow);
-
Ignition burner 3 is designed for igniting the main burner;
-
Main burner 10 is designed for creating and burning air-gas mixture;
-
Electronic control block 11 provides ignition control and gas supply to the ignition and main burners;
-
flame sensor 8 ensures
control of the ignition and main burners’ operation;
-
plug 9 is designed to create a spark charge for the ignition burner’s ignition;
-
Gag 14 is used for draining the water from the water heater’s water circuit in order to prevent it from freezing; a
safet
y valve integrated into the gag is designed to protect the appliance’s water circuit from high water
pressure.;
-
thermo relay 16 (draught sensor) is designed to switch the appliance off in case of no draught in the
exhaust flue
Summary of Contents for NEVALUX-5514
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