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664Y3400
DESCRIPTION OF THE SPECIFICATIONS:
This wall hung electric boiler is available in 5 models:
• Models 09 and 15 are supplied with 400 Volt tr N,
convertible to 230 V single phase.
• Models 22, 28 and 36 are only supplied with 400 V tr N.
The maximum power can be adjusted for all models by acting on the
terminals bridges.
The maximum power can be adjusted for all models by acting on the
terminals bridges.
- Model 09: Adjustable power from 4.2 to 8.4 kW
- Model 15: Adjustable power from 7.2 to 14.4 kW
- Model 22: Adjustable power from 14.4 to 21.6 kW
- Model 28: Adjustable power from 21.6 to 28.8 kW
- Model 36: Adjustable power from 30 to 36 kW
LINING
The boiler is protected by a steel lining that first of all undergoes
a degreasing and phosphation process before being lacquered and
burnt at 220°C.
HEATING BODY
The boiler heat exchanger is constructed from mild steel with
welded joints. It is hydraulic tested under a pressure of 4.5 bar
(maximum working pressure = 3 bar).
HEATING ELEMENTS
Immersion heaters, constructed from stainless steel Incoloy 800
and mounted in the top of the boiler, provide the power source for
the Boiler.
EQUIPMENT
The boiler is equipped with all the necessary components to allow
direct connection to a heating system without the need for a feed
and expansion cistern.
These components include; primary 10 litre expansion vessel
(suitable for a system water content of up to 160 litres), pressure
and temperature gauge, safety valve, circulating pump, low water
pressure switch, control and high limit thermostats, on/off and
power level switches.
CONNECTION
The boiler is suitable for connection to most heating and hot water
systems, with a maximum working pressure of 3bar and a maximum
temperature of 85°C. It can also be used in multiple boiler installations
allowing greater outputs to be achieved.
The boiler, and connection glands for both the main power supply and
optional external controls are provided, suitable for single or three
phase electrical supply depending upon boiler output required.
An internal 3 amp MCB is linked to the incoming electrical supply to
provide the internal control circuit, from which optional controls can
be connected e.g. internal or external timeclock, room thermostat
or Honeywell Sundial controls.
DUAL STAGE THERMOSTAT
The temperature of the boiler is controlled by a dual stage thermostat
which is set by the user to give the desired boiler temperature.
When the boiler has heated up to within 7°C of the set temperature,
the thermostat switches off one power stage and therefore reduces
the heat input. Thanks to this simple but effective form of modulation,
the boiler has longer working cycles and requires less stops and
starts, thus resulting in a more even temperature across the boiler.
It also means less wear and tear on components and, importantly it
uses less power once it has reached working temperature.
CERTIFICATION
The boilers have been manufactured to comply with the following
standards BS EN60335-2-35: 1998, BS EN55014-2:1997 and
BS EN50081-1-1: 1992.
LEGEND
1. Base for relay of DWL priority
2. Control circuit
3. Relay
4. Timer
5. Control terminals
6. Power terminals
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