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Summary of Contents for MCDonald MULTIflow
- Page 1 MULTIflow Thermal Store Cylinders Technical Manual Tel: (01592) 611123 www.mcdonaldwaterstorage.com January 2021 flow MULTI Thermal Store Tank Technical Manual Manual must be completed by Installer and left with Home Owner...
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Page 2: Table Of Contents
MULTIflow OV: Schematic ................... 9 MULTIflow OV: Connection Heights ..............10 MULTIflow SB: Schematic .................. 11 MULTIflow SB: Schematic & Connection Heights ..........12 Technical Data ....................13 Installation Schematic (Open Vented) ............... 14 Installation Schematic (Sealed System) ............. 15 Commissioning .................... -
Page 3: Preface
Our full Terms & Conditions of Sale are available on request. The MULTIflow thermal storage system is required to be fitted by a competent installer, in accordance with Building Regulations G, Gas Safety Regulations, and the Water Fitting Regulations (England and Wales), Water Fitting Regulations (Northern Ireland) or Water Byelaws (Scotland). -
Page 4: Handling & Storage
13/01/21 Handling & Storage It is important the MULTIflow is handled with care and stored the correct way up in a dry place at all times prior to, during and after installation. Carrying handles are provided in the back of the casing to assist with lifting and positioning. -
Page 5: Design
Issue 3 13/01/21 Design The copper MULTIflow Thermal Store is a primary store that is very well insulated to ensure minimum Heat Loss and optimally designed to meet the stringent requirements of ERP. Cold water at mains pressure passes through a High Efficiency Coil, which is specifically designed to draw heat from the thermal store at mains pressure. -
Page 6: Mains Water Supply
Issue 3 13/01/21 Mains Water Supply The MULTIflow’s performance is largely related to the cold water supply pressure and flow rate incoming to the property. • The mains supply to the unit should ideally be in a minimum of 22mm diameter but will work with 15mm if there is adequate pressure and flow rate. -
Page 7: Water Treatment
While we strongly recommend it, inhibitor is optional where the units are utilised with electricity only. However if there are doubts regarding the quality of water being used to fill the MULTIflow, an inhibitor should be added to the appliance when filling in line with the manufacturer’s instructions for these products. -
Page 8: Pipework
• The cold feed from the main incoming stop tap to the MULTIflow should be run in 22mm pipe. The cold main and hot draw-off should also be run in 22mm as far as the branch to the bath tap. -
Page 9: Showers
A flow restrictor may be required in the shower outlet hose. • The hot water supply to a shower-mixing valve should be fed wherever practical directly from the MULTIflow or be the first draw-off point on the hot circuit. •... -
Page 10: Multiflow Ov: Schematic
Issue 3 13/01/21 flow MULTI OV: Schematic Expansion Pipe Sight Glass Feed Pipe Boiler Flow Hot Out c/w Thermostatic Mixing Valve Immersion Heater Expansion (On Peak) Bottle Boiler Control Stat @ 70⁰C High Efficiency Secondary Coil Boiler Return Immersion Heater Cold Mains (Off Peak) Secondary Water... -
Page 11: Multiflow Ov: Connection Heights
Issue 3 13/01/21 flow MULTI OV: Connection Heights The connection heights shown below are taken from the ground (in mm). Capacity (Litres) Height 1000 1200 1400 1600 Width Depth Drain Off Peak IH On Peak IH Boiler Flow 1130 1390 Boiler Return Control Stat Hot Out (Coil) -
Page 12: Multiflow Sb: Schematic
Issue 3 13/01/21 flow MULTI SB: Schematic Expansion Pipe Sight Glass Feed Pipe Hot Out c/w Thermostatic Mixing Valve Expansion Bottle Boiler Coil Flow Boiler Control Stat High Efficiency @ 70⁰C Secondary Coil Boiler Coil Return Immersion Heater Cold Mains (Off Peak) Secondary Water Drain... -
Page 13: Multiflow Sb: Schematic & Connection Heights
Issue 3 13/01/21 flow MULTI SB: Schematic & Connection Heights The connection heights shown below are taken from the ground (in mm). Capacity (Litres) Height 1000 1200 1400 1600 Width Depth Drain Off Peak IH Boiler Flow Boiler Return Control Stat Hot Out (Coil) 1035 1190... -
Page 14: Technical Data
Issue 3 13/01/21 Technical Data ERP / Heat Loss Data Capacity (Litres) Insulation Thickness (mm) ERP Class Standing Heat Loss (Watts) 1.18 1.37 1.56 1.66 Standing Heat Loss (kWh/day) Thermal Stores have been tested in accordance with HWA Thermal Store Specification (Multifuel). -
Page 15: Installation Schematic (Open Vented)
Issue 3 13/01/21 Installation Schematic (Open Vented) -
Page 16: Installation Schematic (Sealed System)
Issue 3 13/01/21 Installation Schematic (Sealed System Boiler) -
Page 17: Commissioning
Ensure minimum of 225mm between the top of the tank and ceiling to allow access to service the ball-valve if ever required. ✓ Check that all pipework connections on the MULTIflow are tight with pipes fully inserted following transit and handling. ✓... - Page 18 Boilers – Set the boiler pump to its highest setting. Set the Boiler Thermostat and also the MULTIflow thermostat to maximum. Fire the boiler on HOT WATER ONLY setting and wait until the boiler goes off. Turn the cylinder thermostat down slowly till it clicks off, then turn it down by approximately 2⁰C.
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Page 19: Troubleshooting
Troubleshooting Below contains a troubleshooting and solution guide to the thermal store system. If this table does not resolve your problem, please contact either your installer or phone McDonald Water Storage Technical Team for further advice. SYMPTOM SOLUTION The thermal store is designed to work best when the store temperature is at or approaching 70°C - 75°C. -
Page 20: Warranty
DHW coil and check/fit descaling equipment. Warranty McDonald Water Storage guarantee the MULTIflow shell against material defect or manufacturing fault for a period of 5 years from the date of delivery. Components are guaranteed for 2 years. - Page 21 Issue 3 13/01/21 • The water quality shall be in accordance with European Council Directive 98/93 EC, or revised version at the date of installation, and is not fed with water from a private supply. Particular: Chloride content: Max. 200mg/l Sulphate content: Max.
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Page 22: Ancillary Descriptions
(01592) 611123. Low Watts Density 3kW Electric Heating Element for Hot Immersion Heater Water Cylinder (WIHLWD) Cylinder Thermostat MULTIflow Thermostat (0 - 90°C) (WTCT) Thermostatic Adjustable Valve top blend hot and Mixing Valve cold water feeds. (WTTMV) Pressure Reducing... -
Page 23: Commissioning Checklist
Failure to install and commission this equipment to the manufacturer’s instructions may invalidate the warranty but does not affect statutory rights. Customer Name: Telephone Number: Address: MULTIflow Make & Model: Production Number: Commissioned by (PRINT NAME): Company Name: Telephone Number:... - Page 24 Issue 3 13/01/21 ALL SYSTEMS What is the incoming static cold water pressure at the inlet to the system? If above 3.0 Bar, has a pressure reducing valve been fitted? Has cold mains strainer been cleaned of installation debris? Is the installation in a hard water area (above 200ppm)? If yes, has a water scale conditioner/inhibitor been fitted? What type of scale conditioner/inhibitor has been fitted? Has flow rate been restricted to a maximum of 15 litres at...
- Page 25 Issue 3 13/01/21 ALL SYSTEMS PRIMARY SETTINGS (Indirect Heating Only) Is the primary circuit a sealed or open vented system? Sealed Open What is the maximum primary flow temperature? ⁰C ALL INSTALLATIONS The hot water system complies with the appropriate Building Regulations. The system has been installed and commissioned in accordance with the manufacturer’s instructions.
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Page 26: Notes
Issue 3 13/01/21 Notes... - Page 27 Issue 3 13/01/21 Notes...
- Page 28 Queensway Industrial Estate Glenrothes Fife KY7 5QF Tel: (01592) 611123 Fax: (01592) 611166 Email: sales@mcdonaldwaterstorage.com The HWA Charter Statement requires that all members adhere to the following: • To supply fit for purpose products clearly and honestly described • To supply products that meet or exceed appropriate standards and building and water regulations •...
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