MHS Boilers 318 Operating & Maintenance Manual
  1. Manuals
  2. Brands
  3. MHS Boilers Manuals
  4. Boiler
  5. 318
  6. Operating & maintenance manual

MHS Boilers 318 Operating & Maintenance Manual

Ultramax floor standing condensing boiler
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Ultramax Floor Standing Condensing Boiler
Operating & Maintenance Manual
For Models 318 - 1018
MHS Boilers Ltd
3 Juniper West
Fenton Way
Basildon Essex
SS15 6SJ
01268 546700 Telephone 01268 888270 Fax
WWW.MHSBOILERS.COM
L263

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the 318 and is the answer not in the manual?

Questions and answers

Related Manuals for MHS Boilers 318

Summary of Contents for MHS Boilers 318

  • Page 1 Ultramax Floor Standing Condensing Boiler Operating & Maintenance Manual For Models 318 - 1018 MHS Boilers Ltd 3 Juniper West Fenton Way Basildon Essex SS15 6SJ 01268 546700 Telephone 01268 888270 Fax WWW.MHSBOILERS.COM L263...

  • Page 2: Table Of Contents

    MHS Boilers Ltd © Contents Ultramax Technical data Ultramax Dimensions 1 Introduction 1.1 General 1.2 Supplier 1.3 This document 1.4 Service 1.5 General restrictions 2 Description 2.1 General 2.2 Main components 2.2.1 Description of principal components 2.3 Boiler control 2.4 Safety aspects...
  • Page 3 MHS Boilers Ltd © 5.4 Hydraulic system 5.4.1 General 5.4.2 Water flow 5.4.2.1 Flow rate and resistance 5.4.2.2 Pump characteristics 5.4.2.3 Isolating valves 5.4.2.4 Valves 5.4.2.5 Water flow protection 5.4.3 Water pressure 5.4.3.1 Operating pressure 5.4.3.2 Boiler expansion tank 5.4.3.3 System expansion tank 5.4.3.4 Water pressure protection...
  • Page 4 MHS Boilers Ltd © Ultramax Technical data Type 1018 Nominal heat output 1000 Nominal heat input (nett.) 1066 Minimum heat output Pilot Burner Gas consumption 30.5 36.3 42.6 48.8 53.7 59.9 70.1 79.4 88.6 97.8 Nat Gas H (10,9kWh/m kg/h 26.0...
  • Page 5 MHS Boilers Ltd © Ultramax 318 – 559 Dimensions 230307...
  • Page 6 MHS Boilers Ltd © Ultramax 318 – 559 Dimensions Type 1130 1130 1230 1010 1110 1046 ⁄ " Rp 1 ⁄ " Rp 2" Rp 2" Rp 2" 1115 1205 1205 1205 1120 1918 1908 1908 1908 1958 1362 1362...
  • Page 7 MHS Boilers Ltd © Ultramax 624 – 1018 Dimensions 230307...
  • Page 8 MHS Boilers Ltd © Ultramax 624 – 1018 Dimensions Type 1018 1330 1130 1130 1330 1330 1210 1003 1053 1203 1253 1146 1146 1146 Rp2" Rp2" Rp2" DN65 PN6 DN65 PN6 1355 1355 1355 1355 1355 1125 1400 1400 1155...

  • Page 9: Introduction

    1.2 Supplier MHS Boilers Ltd are proud to supply and technically support the Ultramax Range of boilers throughout the United Kingdom. For advice or more information please contact your local sales representative or our head office via 01268 591010.

  • Page 10: General Restrictions

    (legal or otherwise), specifications and standards applicable to such installations. All data, information and suggestions provided by MHS Boilers Ltd. in relation to its products are based on careful investigation. Nevertheless, neither MHS Boilers Ltd. nor any other organisation connected with MHS Boilers Ltd.
  • Page 11 MHS Boilers Ltd © The Ultramax units have a small water capacity so that it can rapidly adjust to changing conditions. It can be installed without any restrictions to the return water temperature. The necessary water flow rate is ensured by the standard pump delivered with the appliance.
  • Page 12 MHS Boilers Ltd © 2.2 Ultramax 318-559 Main components 1 Return connection 19 Flue gas collection chamber 2 Flue gas discharge attenuator 20 Combustion chamber 3 Water flow switch 21 Electrical cable duct 4 Safety valve 22 Condensate discharge 5 Inlet connection...
  • Page 13 MHS Boilers Ltd © 2.2 Ultramax 623-1018 Main components 1 Return connection 18 Condensate collection tank 2 Flue gas discharge attenuator 19 Flue gas collection chamber 20 Combustion chamber 3 Water flow switch 21 Electrical cable duct 4 Safety valve...

  • Page 14: Description Of Principal Components

    MHS Boilers Ltd © 2.2.1 Description of principal components The boiler is constructed from the following principal components: This consists of a fan casing, a fan impeller and an electric motor. The fan sucks in combustion air and increases the air pressure.

  • Page 15: Boiler Control

    MHS Boilers Ltd © provided with a filling/drain valve. The flow connection is also provided with a safety valve, a flow switch and a temperature sensor. Boiler pump The boiler pump is mounted on the return connection to the unit and is directly connected electrically to the appropriate terminals in the connection box.

  • Page 16: Safety Aspects

    MHS Boilers Ltd © 2.4 Safety aspects The boiler contains the following safety components: - Flame protection with 1x re-start (ionisation) - Water flow protection - Maximum water temperature protection - Gas valve test - Gas valve leak test (option) - Minimum air pressure protection - Boiler pump motor over-heating protection (Clixon).

  • Page 17: Delivery And Transport

    MHS Boilers Ltd © Safety provisions The installation may never be switched on if any of the panels have been removed or if any of the safety devices have been disabled. Instruction and warning stickers None of the instruction and warning stickers attached to the installation may be removed or covered and during the whole of the lifetime of the installation they must remain legible.
  • Page 18 MHS Boilers Ltd © Moving the appliance A pallet truck or fork lift truck with a minimum fork length of 1 m can be used at the side of the unit. Rollers After the wooden blocks have been removed, it is possible to move the appliance by rolling it over tubes.
  • Page 19 MHS Boilers Ltd © Caution: - Ensure that the lifting straps are of the correct quality! - Never move the units over the heads of persons! Dismantling and reassembly When the unit cannot be placed in position because of its dimensions or weight, the boiler may be partially dismantled.
  • Page 20 MHS Boilers Ltd © Burner Type Length mm Breadth mm Height mm Weight kg 1010 1010 1010 1010 1050 1010 1150 1010 1310 1420 1010 1420 1110 1420 1210 1018 1420 1310 Heat Exchanger One Type Length mm Breadth mm...
  • Page 21 MHS Boilers Ltd © Dimensions and weights of the Condensate Collectors. Condensate Collector Type Length mm Breadth mm Height mm Weight kg 1320 1320 1320 1320 1320 1450 1070 1950 1950 1950 1018 1950 1070 230307...
  • Page 22 MHS Boilers Ltd © Dimensions and weights of the Frame. Frame Type Length mm Breadth mm Height mm Weight kg 1325 1325 1325 1065 1325 1065 1325 1165 1630 1266 2004 1066 2004 1066 2004 1266 1018 2004 1266 Positioning Once the unit is in the correct position, the wooden blocks must be removed.
  • Page 23 MHS Boilers Ltd © Protection against frost If the unit is out of use during the winter months there is a danger of freezing. Drain the water from the installation using the filling/drainage valves. 230307...

  • Page 24: Installation

    The appliance must be installed by a recognised installer in accordance with the applicable national and local specifications and regulations. Commissioning should be carried out by the Technical Service Department of MHS Boilers Ltd, who can also determine the composition and quality of the system water.

  • Page 25: Electrical Connection

    The pressure of the gas supplied to the unit must be reduced to 20 mbar for natural gas or 37 mbar for propane with the use of a gas pressure regulator if required. The maximum gas pressure sustainable at the gas valve inlet connection is 100 mbar for models 318 - 559 and 25 mbar for models 624 - 1018 The loss of pressure in the connecting pipes must be such that, at maximum boiler capacity, the pressure must never fall below 20 mbar for natural gas or 37 mbar for propane.
  • Page 26 MHS Boilers Ltd © The appliance can be switched on and off with the switch on the control panel. The power supply voltage cannot be removed from the boiler pump relay in this way. The installer must fit a mains isolator switch in the power supply to the unit within the boiler room.
  • Page 27 MHS Boilers Ltd © Electro-technical data * Tolerance on voltage: 230 V +10% /-15% tolerance on frequency: 50 Hz } 5% ** tolerance on voltage: 400 V +10% /-15% *** the stated pump power is based on the maximum power consumption in pump speed 3. The pump curves can be used to determine the optimum operating point in relation to pump efficiency and power consumption.
  • Page 28 MHS Boilers Ltd © Boiler enable (240 V). When these terminals are connected the primary pump will 10 - 11 be started and the boiler will be enabled. When there is an open circuit between them the boiler will be shut down. The pump will also stop after the set run on time.

  • Page 29: Water Connections

    MHS Boilers Ltd © Primary boiler pump control (0 – 10 V = +2°C – +90°C). * the use of screened cables 43 - 44 is recommended. 5.3.3 Water connections The appliance must be installed by a recognised installer in accordance with the applicable national and local specifications and regulations.

  • Page 30: General

    MHS Boilers Ltd © 5.3.4.1 General The unit can optionally be supplied as a room sealed appliance. This simplifies the possibilities for installation within the building. Guide lines and installation instructions The flue gas discharge and the air supply systems must be installed by a recognised installer in accordance with the applicable national and local specifications and regulations.
  • Page 31 MHS Boilers Ltd © The connection to the air supply pipe is always mounted on the top of the unit. Multiple units may not be connected to the same air supply or flue pipe. To prevent snow entering, the air supply pipe must extend at least 30 cm above the roof and must be fitted with a rain cap.

  • Page 32: The Flue System

    MHS Boilers Ltd © period condensation occurs, the condensate must be able to flow back to the unit. Inspection of the air supply and flue pipe must be possible. The connection, exit position and height in relation to possible obstacles must comply with the applicable national and local standards and regulations.
  • Page 33 Because the appliance is fitted with a “premix burner” with a fan, an over-pressure is built up in the unit. This overpressure is sufficient to overcome the resistance of the cooled burner, heat exchangers, air intake and chimney up to a maximum of 1 mbar (318-559) 1.5 mbar (624-1018) external to the boiler.
  • Page 34 MHS Boilers Ltd © The boilers are equipped with a flue attenuator. Never connect the flue pipe directly to the flue attenuator. The flue attenuator must always be free standing. It must never be in contact with the walls of the chimney.

  • Page 35: Condensate Discharge

    MHS Boilers Ltd © Type Ζ= 1 Diameter Elbow 90° Elbow 90° Elbow 45° 90° Tee ζ= ζ= 0,5 in mm R/D = 1 right angle 250* 12.4 250* 12.3 300* 14.1 11.0 300* 14.8 11.1 300* 14.6 10.9 300*...

  • Page 36: Hydraulic System

    MHS Boilers Ltd © Fig. 23 Condensate discharge 5.4 Hydraulic system 5.4.1 General Although it is not the intention to provide a complete handbook covering the most divergent hydraulic systems, the data is more extensive than would generally be provided in the case of conventional central heating boilers.
  • Page 37 MHS Boilers Ltd © Type ∆T 20 K Pump data Nominal Boiler- Grundfos pump Pump Head at Available Max.* power flow rate resis type speed Qnom. head at consumption tance Qnom. 13.55 40-120F 16.08 50-120F 18.27 50-120F 21.59 50-120F 23.78...

  • Page 38: Pump Characteristics

    MHS Boilers Ltd © 5.4.2.2 Pump characteristics 230307...
  • Page 39 MHS Boilers Ltd © 230307...

  • Page 40: Isolating Valves

    MHS Boilers Ltd © Type Pump Pmax Pmin speed φ 3x400 V UPS 40-120F 0.56 0.85 UPS 50-120F 376 – 508 0.94 0.81 UPS 65-120F 1.45 0.90 UPS 65-120F 624 – 826 1.45 0.90 UPS 80-120F 923 - 1018 1100 1.80...

  • Page 41: Boiler Expansion Tank

    MHS Boilers Ltd © 5.4.3.2 Boiler expansion tank It is possible to fit an expansion tank in the return pipe between pump and the boiler isolating valve. 5.4.3.3 System expansion tank The size of the expansion tank is determined by the quantity of water in the system. Our advice is to fit the system expansion tank at the neutral point (centrally) of the low velocity header.

  • Page 42: Examples Of Hydraulic Systems

    MHS Boilers Ltd © Before the water is topped up, the hardness and the chloride content of the water must be determined. During the construction of larger installations, one of the appliances may be operational. New circuits may be regularly switched in, which must occur together with the addition of fresh water.
  • Page 43 MHS Boilers Ltd © between the supply to the flow and the return collector does not exceed 50 mmwg (approximately 0.5 m/s). The diameter of the low velocity header can be determined using the formula: Where: = the diameter of the low velocity header in m...
  • Page 44 MHS Boilers Ltd © temperature in the connected circuits. Systems with a separate flow header and a return header Flow headers in combination with return headers are often used in renovation projects. Several circuits operate with mixing valves or diverting valves. In both cases a low velocity header or a bypass is necessary.
  • Page 45 MHS Boilers Ltd © Installations with multiple appliances For installations in which each appliance is fitted with a pump, the pump is switched off after the boiler has been shut down. Fig. 29 Installation with multiple appliances Hydraulic short-circuit In order to avoid a short circuit over a non-operating appliance, we advise the use of non-return valves.
  • Page 46 MHS Boilers Ltd © Fig. 30 Installation with more than one appliance, without non-return valves and making use of a low velocity header for two boilers Fig. 31 Low velocity header for two boilers 230307...

  • Page 47: Operating Instructions

    MHS Boilers Ltd © 6 Operating instructions 6 .1 Function When a heating demand is received and before the boiler starts up, the appliance must be prepurged. The fan supplies combustion air and has a modulating control. A zero controller in the gas valve determines the required quantity of gas.

  • Page 48: Regulation

    MHS Boilers Ltd © 6 .2 Regulation Depending on the heating demand, the unit will be started up and shut down between 0% and 25% capacity and will be continuously modulated between 25% and 100% capacity. 6.3 Control module Lid closed...
  • Page 49 MHS Boilers Ltd © The operating modes are:- standby the boiler switched off but frost protection is active automatic the boiler can operate in heating or hot water mode summer mode the boiler will only react to a hot water demand...

  • Page 50: Fault Indications

    MHS Boilers Ltd © - Open the lid (the arrow at the bottom of the LCD display indicates parameter P1) - Push the Reset/Programming key (pos. 3), the LED will light, turn the rotary switch (pos. 5) until the desired water flow temperature has been reached - Push the Reset/Programming key, the LED will go out - Close the cover.

  • Page 51: Start-Up

    MHS Boilers Ltd © period of 5 seconds. This in spite of the fact that valve has been sent a close signal. Correct fault. Error in the control of gas valve 2. After burner has stopped a flame has been detected for a period of 5 seconds.

  • Page 52: Commissioning

    Commissioning must be carried out by skilled personnel. Failure to observe this condition will invalidate the guarantee. Commissioning of the unit by MHS Boilers Ltd will not only ensure optimum operation of the unit but will enhance the warranty enjoyed by the unit.
  • Page 53 MHS Boilers Ltd © Check the chimney Check the chimney. Ensure that the connection between the appliance and the chimney is such that gasses cannot escape. The flue must be connected to outer white flexible seal and not the inner vertical extension.
  • Page 54 MHS Boilers Ltd © Burner pressure measurement Type 318 - 559 Burner pressure measurement Types 624 - 1018 Measure the gas pressure at the supply side of the gas valve. This must be at least 18 mbar (for natural gas) with the boiler operating at full capacity. When multiple appliances are installed in the boiler room, this pressure must be measured with all the appliances operating at full capacity.

  • Page 55: Maintenance

    MHS Boilers Ltd © Check the appliance at minimum capacity Adjust the appliance to operate at minimum capacity. At minimum capacity the following settings must be checked and corrected if necessary only using the N-adjust screw on the gas valve.

  • Page 56: Procedure

    MHS Boilers Ltd © The following activities must be carried out (for an extensive description of these activities, see 8.3): - Renew the ignition and ionisation electrodes - Clean the air inlet damper - Clean the fan blades - Clean the flue gas collection chamber...

  • Page 57: Cleaning The Burner And Heat Exchangers

    MHS Boilers Ltd © 6 Check for leaks (soap solution). - Inspect all the pressure measurement pipes. Ensure that these are securely fastened and tighten the connection nuts if necessary. - Inspect the screws in the measuring nipples; renew the measuring nipples if they have become damaged.

  • Page 58: Service

    15 sec. CO13 Deceleration time 15 sec. CO14 Control mode 1 (quadratic) CO15 V/f rated frequency 70 Hz 8 .8 Service For service and maintenance the Technical Service Department of MHS Boilers Ltd can be contacted on 01268 546700. 230307...
  • Page 59 MHS Boilers Ltd © Notes 230307...
  • Page 61 MHS Boilers Ltd © 230307...
  • Page 62 MHS Boilers Ltd © 230307...

This manual is also suitable for:

378508559624730443 ... Show all

Table of Contents