Technical data
Table Of Contents
- User Instructions for the Micromat boiler
- Product Description
- Technical Data
- Delivery Consignment / Unpacking the boiler
- Boiler location
- Installation Clearances
- Wall Mounting
- Gas Connection
- Gas Conversion
- System Flow & Return connections
- Condensate Connection
- Flue / Combustion Air connection
- Flue Systems
- Calculating Flue Resistance
- Ventilation requirements single appliances
- Hydraulic System Design
- System type 1
- System type 2
- System type 3
- System type 4
- System type 5
- System type 6
- System type 7
- System type 8
- Water Treatment
- Soldering Flux
- Electrical Connection
- System Type 1
- System Type 2
- System Type 3
- System Type 4
- System Type 5
- System Type 6
- System Type 7
- System Type 8
- Commissioning The Micromat EC
- Installation Codes
- First Firing
- Pop Up Menu
- Setting DHW Temperature
- Servicing
- Screen Display Diagnosis of Faults
8
These instructions are intended to assist the installer, commissioning engineer, maintenance engineer and user with
the installation, maintenance and usage of MICROMAT EC 16/22, 24/28, 31/36 & 38/45 models gas fired condensing
boilers.
Please read this manual fully before commencing the installation of the appliance. The MICROMAT EC must only be
installed by persons deemed to be competent. This manual must be handed to the appliance user following comple-
tion of the installation.
3.0 product
description
The MICROMAT EC range of wall mounted gas fired condensing boilers are state of the art appliances which include
a comprehensive range of features. The appliance must only be used on sealed and pressurised systems. System
design must take into account the boiler operating Dt of 20
o
C.
Wall mounted with compact dimensions
At 900H x 458W x 355D the MICROMAT EC boiler provides maximum heat from minimum dimensions without
compromising serviceability.
fully modulating heat output
The output of the boiler is fully variable, sliding between (approx.) 20% to 100%, which automatically and instantly
adjusts to match the needs of the system. The percentage of power at any given time can be dictated by either
outside air temperature, flow temperature, return temperature, stored domestic hot water temperature, or room
temperature, or a combination of the aforementioned.
fully condensing stainless steel heat exchanger
The MICROMAT EC boiler is designed with extended heat exchange surface area and is fabricated from corrosion
resistant long-life stainless steel. The unique Spiranox heat exchanger will return operating efficiencies from 88%
gross (96% nett) at 60°C return temperature, up to 96% gross (104% nett), at 30°C return temperature.
extremely low harmful emissions
The boiler utilises 100% pre-mix gas/air fed at positive pressure to the metal fibre sheathed radiant burners. The
combustion system incorporates internal flue gas re-circulation and this combined with the precise nature of pre-mix
fuel/air control, gives ultra low emissions to satisfy the most stringent emission regulations in the world currently.
That is: <20mg/kWh NOx (14 ppm DAF) and <14mg/kWh CO (13 ppm DAF). The fully modulating nature of the
appliance also reduces emissions by avoiding repeated start/stops and the associated increase in emissions, which
occurs with burner on/off cycling.
accurate variable burner output control
The pre-mix burner fans have low voltage direct current drive motors with pulse relay counting. This system allows
precise control over fan speed/combustion air volumes. Coupled with a gas valve system set to provide a one to one
ratio of precisely measured volumes of fuel to air, this allows extremely accurate and instant variable burner output
control to be achieved.
2.0 general
notes