Piazzetta MT 361 Installation, Use And Maintenance Instructions

Piazzetta MT 361 Installation, Use And Maintenance Instructions

Thermo boiler stove

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Summary of Contents for Piazzetta MT 361

  • Page 2: Important Information

    In line with its policy of constant product improvement and renewal, the manufacturer may make changes without notice. This document is the property of Gruppo Piazzetta S.p.A.; no part of it may be disclosed to third parties without the written permission of Gruppo Piazzetta S.p.A.
  • Page 3: Table Of Contents

    DIMENSION MT 361 CLOSED TANK ........
  • Page 4: General Rules

    DT2011911-00 1.0 GENERAL RULES Before proceeding with installation, choose the most suitable position for your fireplace according to the indications given in the section “MINIMUM SAFETY DISTANCES” and to all the indications below. Fig. 1 CHIMNEY STACK FLUE HOOD GRILLE CONNECTION TO FLUE LINING WALL SAFETY DISTANCES...
  • Page 5: Single Flueway Or Chimney

    If the flue is an incorrect size or installed other than in Fig. 3 Fig. 4 compliance with the above instructions, Gruppo Piazzetta S.p.A. cannot be held liable for malfunctioning of the appliance, damage to property or injury to persons or animals.
  • Page 6: Chimney Stack

    DT2010025-03 CHIMNEY STACK Fig. 7 Fig. 8 The chimney stack is a device fitted on the top of the chimney that is designed to aid dispersion of the flue gas into the atmosphere. The chimney stack must comply with the following requirements: - it must have an internal section and shape the same as the flue (A);...
  • Page 7: Fresh Air Intake

    DT2010170-01 FRESH AIR INTAKE Fig. 12 To ensure trouble-free operation the stove/fireplace must have the necessary air available for combustion and this is provided through the fresh air intake. The fresh air intake must: Hood grille - have a total free cross section at least equal to the size given under “TECHNICAL DATA”;...
  • Page 8: Installation Environment

    DT2010033-01 INSTALLATION ENVIRONMENT The appliance must be installed in a location which allows safe and convenient use as well as easy maintenance. If the appliance being installed requires an electrical socket, the room must also be provided with an earthed power supply in accordance with current regulations. The room where the appliance is to be installed must comply with the following requirements: it must not be used as a garage, store for combustible material or for activities posing a fire hazard;...
  • Page 9: Suitable Heat Insulating Materials

    DT2010173-01 SUITABLE HEAT INSULATING MATERIALS Type of suitable heat insulating materials. Material: mineral fibre; ceramic fibre; rock wool. Form: sheets; mat; shells. Thermal conductivity λ (400°C) 0.1 W/mK Specifications: specific weight of at least 245 kg/m³ with working temperature limit of at least 1000°C. Thickness: as shown in the figures under “MINIMUM SAFETY DISTANCES”.
  • Page 10: Connection To The Flueway

    Failure to comply with the above could cause a fire!!! The minimum safety distances to be observed are given in the table below: MODELS MT 361 clearance from appliance to flammable wall at the side clearance from appliance to flammable wall at the rear...
  • Page 11: Lining Wall

    Furthermore, the surround must be made with non-flammable materials in compliance with regulations. For Gruppo Piazzetta S.p.A. surrounds, follow the instructions enclosed with the product. Testing and lighting for first time Only a visual inspection can be made in the intermediate stage for heating appliances that must be assembled or clad with brickwork or require the use of cement binders.
  • Page 12: Prevention Of Domestic Fires

    DT2010027-02 1.14 PREVENTION OF DOMESTIC FIRES The appliance must be installed and used in compliance with the manufacturer’s instructions and European and national standards as well as local regulations. When a flue pipe passes through a wall or a ceiling, special installation methods must be applied (protection, thermal insulation, distances from heat-sensitive materials, etc.) See “CONNECTION TO THE FLUEWAY”...
  • Page 13: Technical Data And Specifications

    Enamelled stove MT 361 ..... .1 Left grate MT 361 ......1 Right grate MT 361 .
  • Page 14: Technical Data

    DT2012191-00 TECHNICAL DATA U.M. MT 361 Rated heat output 26.0 Heat output to the water 18.0 Heat output to the room Consumption at rated heat output kg/h Thermal efficiency CO content (with 13% O Approved in accordance with standard EN 13229 Test report No.
  • Page 15: Accessories

    DT2012194-00 ACCESSORIES Standard accessories - Front fireguard. - Removable ash drawer. - Smoke damper with control. - Hood grille. - Fresh air intake with manual control. - Pipe fittings - Sensor pocket/holder Optional accessories - Rapid heat exchanger / circulation pump kit - Safety unit kit with open tank - Safety unit kit with closed tank - Self-operated valve kit for safety relief system with closed tank...
  • Page 16 Rapid heat exchanger – circulation pump kit diagram Fig. 23 Hot domestic water outlet Ø 1/2 ” Boiler return Inlet for hot water pipe Ø 3/4" from fireplace boiler Ø 3/4" Cold domestic Delivery to heating water inlet Ø 1/2 ” system Ø...
  • Page 17 4) SELF-OPERATED VALVE KIT FOR SAFETY RELIEF SYSTEM WITH CLOSED TANK (optional) consisting of: - Self-operated relief valve - Self-operated valve sensor pocket/holder 5) HEAT REGULATOR KIT (optional) consisting of: - Heat regulator - 3 sensors - 3 pockets/holders Sensor specifications •...
  • Page 18: Dimension Mt 361 Open Tank

    DT2033123-00 DIMENSIONS MT 361 OPEN TANK Ø 25 26.7 39.2 67.5 171.5 135.5 55.5 54.8 79.4 32.5 65.5 49 .5 M = DELIVERY Ø 1” M= MANDATA 1" R = RETURN Ø 1” R= RITORNO 1" 90.4 DT2033124-00 DIMENSIONS MT 361 CLOSED TANK Ø...
  • Page 19: Safety Devices

    - Warning buzzer - Circulating system - Closed type expansion tank When designing the closed boiler fireplace, Gruppo Piazzetta has ensured that it complies with current laws and regulations and has fitted DT2012196-00 the actual product with some important safety systems.
  • Page 20: Expansion Tank

    DT2012197-00 EXPANSION TANK As already indicated, an expansion tank is compulsory when using a closed boiler fireplace. The function of this device and its importance must be emphasised. The expansion tank has a dual function: for heating and for plumbing purposes. From a heating point of view its function is to allow the water, which is an incompressible fluid, to expand or contract.
  • Page 21: Vent And Expansion Pipe

    DT2012198-00 VENT AND EXPANSION PIPE Fig. 27 1 – Vent and expansion pipe MINIMUM RADIUS OF BEND: PIPE DIAMETER X 1.5 2 – Open type expansion tank 3 – Vent and overflow pipe 4 – Delivery 5 – Return 6 – Fill pipe 7 –...
  • Page 22 Self-operated safety valve specifications (part of the Piazzetta kit) Body: brass UNI EN 12165 CW617N, chromed Stem: brass UNI EN 12164 CW614N Plug seal: EPDM Seals: EPDM Spring: stainless steel Bellows support: Self-operated safety valve performance (part of the Piazzetta kit)
  • Page 23: Installation

    Only professionally qualified persons must install, connect and test the closed boiler fireplace in full compliance with current regulations and the enclosed instructions for installation and operation. In the case of incorporation into an existing system, the relative compatibility must be carefully checked. Gruppo Piazzetta S.p.A. DT2010936-00 is relieved from all liability for any damage caused to property or injury to persons by the system.
  • Page 24: Preparations For Installation

    • Adjust the height of the appliance from the ground in relation to the chosen surround. If it is necessary to increase the height, insert suitable shims. If a PIAZZETTA surround is to be installed, the exact height of the firebox is given in the “ASSEMBLY INSTRUCTIONS”...
  • Page 25: Installation Of The Smoke Damper

    DT2010328-00 INSTALLATION OF THE SMOKE DAMPER Fig. 33 The firebox is provided with a smoke damper with articulated rod so that hoods with different angles of inclination can be fitted. For installation purposes proceed as follows: - Fit the damper [2] into place and keep it in a vertical position. - Insert the rod [1] fully into the damper [2], taking care that the tab [3] is facing downwards.
  • Page 26: Plumbing

    DT2012206-00 PLUMBING Fig. 36 Remove the protectors from the 1” fittings. ¾” PLUGS TAPPI 3/4" In the case of OPEN TYPE TANK installation, UNDER NO CIRCUMSTANCES REMOVE THE TWO ¾” PLUGS. Removal of these plugs could lead to incorrect use of the boiler and as a consequence to its early deterioration with PROTECTORS PROTEZIONI...
  • Page 27 Fig. 39 Mount the union tee, reducing coupler and the pocket/holder for the Open type tank Closed type tank Vaso aperto Vaso chiuso heat regulator sensor, to be found in the ACCESSORIES kit, onto the 1” fitting chosen for boiler delivery. (Fig. 39) Safety unit kit (optional) To assemble the safety unit, fit together the parts as shown in the figure and proceed with installation of the system.
  • Page 28 Water heating Open type tank 1) MT 361 2) Heat exchanger/circulation pump kit, which comprises: Rapid heat exchanger Circulation pump Diverter valve Control unit Temperature sensor 3) Safety unit, which comprises: Manifold Temperature/pressure relief valve Safety valve Pressure gauge Sensor pocket/holder...
  • Page 29: Filling The System

    DT2012207-00 FILLING THE SYSTEM Once the appliance has been installed and all the required connections completed, carry out the operating test together with the installers before fitting the surround, after which the declaration of installation must be written out. If it is an OPEN TYPE TANK installation •...
  • Page 30: Use

    DT2011917-00 5.0 USE • Certain basic facts can be all-important for best performance and getting the most out of your appliance. Please find below some basic information intended to be of use with regard to the choice of firewood, the adjustment of the dampers and proper operation of the appliance. •...
  • Page 31: Smoke Damper Regulation

    An excessive increase in fuel and excessive opening of the smoke damper leads to an increase in appliance heat, decrease in efficiency and an increase in wood consumption. SMOKE DAMPER POSITION LIGHTING OR STOKING-UP FIREPLACE LIT OF FIREPLACE MT 361 1/6 OPEN (*) OPEN (*) Position referred to a draught of 12 Pa H07025140 / DT2000666 - Rev. 02...
  • Page 32: Combustion Air Regulation

    Regulation is carried out as shown in the figure to the side. Refe- rence should also be made to the section “SMOKE DAMPER REGU- LATION”. DT2030526-00 Regulation and quantity of material to be burned for rated power: MT 361 Material to be burned See “FUEL” section Air damper position 5 mm OPEN...
  • Page 33: Lighting

    - check that the flame becomes less intense and the water temperature drops; - do not open the door. When the appliance has cooled down, find the cause of the problem and if necessary call in specialised personnel (C.A.T. – Piazzetta After- Sales Service Centre).
  • Page 34: Maintenance

    DT2011918-00 6.0 MAINTENANCE • Maintenance is to be considered compulsory for correct and efficient appliance operation. If maintenance is not carried out with the recommended frequency, appliance performance could suffer. The manufacturer will not be responsible for appliance deterioration or malfunction if due to poor maintenance.
  • Page 35: Cleaning The Glass (Daily)

    Every one of our fireboxes comes with a door fitted with a 4 mm thick pyroceram panel resistant to thermal shock up to 750°C. This can only be broken by heavy impact, such as banging the door too hard. In the event of breakage replace with original Gruppo Piazzetta S.p.A. parts only. Seal control Proper tightness of the door seal is essential for optimal product performance.
  • Page 36: Cleaning The Smoke Baffle Plate And Boiler

    DT2012208-00 CLEANING THE SMOKE BAFFLE PLATE AND BOILER The boiler and smoke baffle plate must be cleaned periodically. The baffle plate consists of a fixed and a movable part, the latter tilting every time the smoke damper control is moved. To clean the baffle plate simply use a vacuum cleaner with hose approx.
  • Page 37: When The Boiler Stove Has Not Been Used For Some Time

    DT2012306-00 7.0 TROUBLESHOOTING Some of the above problems could be resolved by following the instructions. Only qualified persons must carry out work on the appliance and only when it is cold and disconnected from the power supply (pull out the plug). Unauthorised tampering with the appliance or use of other than original spare parts invalidates the warranty and relieves the manufacturer of all and any liability.
  • Page 38 Problem Cause Remedy Use the quantity of wood indicated in The appliance does not warm the Quantity of wood less than necessary the instructions (See “TECHNICAL room or the water system for nominal efficiency DATA”) Appliance too small for the room or Integrate with another product the water system to be heated Inadequate insulation for the environ-...
  • Page 42 N° matricola prodotto, da comunicare al Centro Assistenza Tecnica del Gruppo Piazzetta in caso di richiesta assistenza. Product serial number, to be quoted when requesting service from the Gruppo Piazzetta After-Sales Service Centre. Via Montello, 22 31011 Casella d’Asolo (TV) - ITALY Tel.

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