andrews CWH30/200 Installation, Operation And Maintenance Manual
High efficiency condensing stainless steel storage water heater maxxflo series
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INSTALLATION OPERATION AND MAINTENANCE MANUAL
MAXXfl o
High Effi ciency Condensing Stainless Steel Storage Water heaters
High Effi ciency Condensing Stainless Steel Storage Water heaters
CWH30/200, CWH30/300, CWH60/200, CWH60/300,
CWH90/200, CWH90/300, CWH120/200, CWH120/300
Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference
M6500 Rev B
E281B
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Related Manuals for andrews CWH30/200
Summary of Contents for andrews CWH30/200
- Page 1 High Effi ciency Condensing Stainless Steel Storage Water heaters High Effi ciency Condensing Stainless Steel Storage Water heaters CWH30/200, CWH30/300, CWH60/200, CWH60/300, CWH90/200, CWH90/300, CWH120/200, CWH120/300 Please read and understand these instructions before commencing installation and leave this manual with the customer for future reference...
- Page 2 Th e attention of UK users is drawn to their responsibilities under the Health and Safety Regulations. All installation and service on Andrews Water Heaters must be carried out by competent qualifi ed personnel and, therefore, no liability can be accepted for any damage or malfunction caused as a result of intervention by unauthorised personnel.
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Page 3: Table Of Contents
CONTENTS PAGE SECTION 1 GENERAL AND SAFETY INFORMATION General Information British Standards and Codes of Practice Health and Safety Regulations 1993 Legionellae in Water Heaters SECTION 2 TECHNICAL DETAILS Technical Details – CWH30/60/90/120 Technical Parameters Product Fiche Heater Dimensions – 200 litre model Heater Dimensions –... -
Page 4: General And Safety Information
SECTION 1 • GENERAL AND SAFETY INFORMATION GENERAL AND SAFETY INFORMATION Th e Andrews Water Heater has been designed for use with NATURAL GAS OR LPG and is manufactured to give an effi cient, reliable and long service life. To ensure the continued, trouble-free operation of your heater at maximum effi ciency, it is essential that correct installation, commissioning, operation and service procedures are carried out strictly in accordance with the instructions given in this manual. -
Page 5: Legionellae In Water Heaters
TECHNICAL DETAILS • SECTION 2 Model Reference CWH 30/200 60/200 90/200 120/200 30/300 60/300 90/300 120/300 Input gross Hs min/max 6.7–31.1 kW 13.4–62.2 kW 20.1–93.3 kW 26.8-124.4 kW Input nett Hi min/max 6.0–28.0 kW 12.0–56.0 kW 18.0-84.0 kW 24.0-112.0 kW Output (tank set point : 60°C) 6.5–30.5 kW 13.0–61.0 kW... -
Page 6: Technical Details
SECTION 2 • TECHNICAL DETAILS Technical parameters MAXXfl o Water Heater... -
Page 7: Product Fiche
TECHNICAL DETAILS • SECTION 2 Product Fiche MAXXfl o Water Heater... - Page 8 SECTION 2 • TECHNICAL DETAILS INSPECTION HATCH INSPECTION HATCH MAXXfl o Water Heater...
- Page 9 TECHNICAL DETAILS • SECTION 2 INSPECTION HATCH INSPECTION HATCH MAXXfl o Water Heater...
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Page 10: Installation
10 10 SECTION 3 • INSTALLATION INSTALLATION DESCRIPTION LOCATION Th e MAXXfl o series is a direct fi red condensing storage Th e location selected for installation of the heater must water heater which has a stainless steel tank that is heated allow the provision of a satisfactory fl... -
Page 11: Water Quality And Treatment
WATER QUALITY AND TREATMENT comparative pipe work system. Th e temperature and pressure relief valve(s) are factory When installing Andrews Water Heaters we would fi tted. FOR SYSTEMS WITH LARGER PIPE VOLUMES OR recommend the inclusion of water treatment and that... -
Page 12: Condense Drain
12 12 SECTION 3 • INSTALLATION CONDENSE DRAIN SECONDARY RETURN CIRCULATION PUMP Condensation is formed in the heater and this must be An additional connection for a secondary circulation is continuously discharged into a drain. A trap is supplied available in the top of the heater that is located between which should be connected into a drain via a tundish or the hot fl... -
Page 13: Typical Installations - Cwh30/60 & Cwh90/120
INSTALLATION • SECTION 3 13 13 Fig 3A – Typical installation Fig 3B – Typical installation MAXXfl o Water Heater... -
Page 14: Gas Supply - Natural Gas
Gas or its authorised contractor to ensure that they are adequate to deal with the gas supply to the water heater(s) Andrews Water Heaters are unregulated and a second stage in addition to any existing or additional requirements. regulator must be installed to give an inlet pressure to the appliance as follows: (see fi... -
Page 15: Typical Bulk Storage Vessel Installation
INSTALLATION • SECTION 3 15 15 Fig 4: Typical Bulk Storage Vessel Installation Fig 5: Typical Cylinder Installation Important Th ese drawings show a schematic representation only and should not be used for installation purposes. Contact your gas supplier for authorised installation drawings. MAXXfl... -
Page 16: Electrical Supply
16 16 SECTION 3 • INSTALLATION ELECTRICAL SUPPLY ELECTRICAL CONNECTION External wiring to the water heater(s) must be installed in A terminal block can be found above the control panel (Fig accordance with current I.E.E. Regulations for the wiring of 4, below). -
Page 17: Wiring Diagram
INSTALLATION • SECTION 3 17 17 Fig. 7 – Wiring Diagram Make sure that the phase (L) and the neutral (N) are connected to the correct terminals on the connector. Th e appliance is phase sensitive therefore swapping the phase and neutral will lead to a fault in the appliance. MAXXfl... -
Page 18: Temporary Water Heater Temperature Change
18 18 SECTION 3 • INSTALLATION TEMPORARY WATER HEATER TEMPERATURE If, for example, the secondary pre-set water heater CHANGE temperature is set at 70°C, the water heater temperature returns back to normal operation as soon as the temperature at the secondary measuring point has been It is possible to change the water heater temperature above 65°C for more than 20 minutes. -
Page 19: Hwst Tank Dimensions And Wiring Diagram
INSTALLATION • SECTION 3 19 19 Fig 9 – HWST Tank Dimensions HWST 200 HWST 300 STORAGE TANKS T&P outlets Thermostat Drain access 28 mm valve PLAN VIEW " Hot water Tank inspection hatch supply 1" Return 28 mm T&P outlets "... -
Page 20: Flue Systems
fl ue system, provides a room sealed secondary fl ue length is over 1.5m. application. Th e concentric fl ue, supplied by Andrews, is available for either horizontal or vertical installation If installed in a roof valley, the terminal should be at least and the table below shows the basic kit supplied plus 1m above the highest part of the roof structure and 2.5m... - Page 21 INSTALLATION • SECTION 3 21 21 CWH30 & CWH60 FLUE SYSTEMS Th e CWH30 & CWH60 uses a concentric fl ue system, 125mm outside diameter with an inner fl ue of 80mm diameter. Flue components fi t together with silicon sealing rings and the fl ues are retained with sealing clamps. Each heater can be ordered with either a horizontal or vertical fl...
- Page 22 22 22 SECTION 3 • INSTALLATION CWH30 & CWH60 ALTERNATIVE FLUE SYSTEMS CWH30 max 50M Conventional CWH60 max 20M Conventional CWH30 max 14M Concentric CWH60 max 12M Concentric Over 1.5M use flue Condense trap. Minimum between Condense Tap Vertical terminals 300mm drain Minimum between balanced...
- Page 23 INSTALLATION • SECTION 3 23 23 CWH30 & CWH60 STANDARD FLUE SYSTEM DIMENSIONS ALL 80/125mm Ø CONCENTRIC FLUE Ø125 Ø80 Ø 123/124 CONDENSATE TRAP PART No E310 Ø80 45º ELBOW C/W CLAMP PART No E308 Ø80 VERTICAL FLUE TERMI NAL C/W CLAMP (CONDENSING) PART No E067 90º...
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Page 24: Flue Systems - Cwh 90 & 120
24 24 SECTION 3 • INSTALLATION CWH90 & CWH120 FLUE SYSTEMS Th e CWH90 & CWH120 uses a concentric fl ue system, 200mm outside diameter with an inner fl ue of 130mm diameter. Flue components fi t together with silicon sealing rings and the fl ues are retained with sealing clamps. Each heater can be ordered with either a horizontal or vertical fl... -
Page 25: Alternative Flue Systems - Cwh 90 & 120
INSTALLATION • SECTION 3 25 25 CWH90 & CWH120 ALTERNATIVE FLUE SYSTEMS CWH90 max 50M Conventional CWH120 max 40M Conventional CWH90 and CWH120 max 14M Concentric Minimum clearence Over 1.5M use flue between vertical condensetrap. balanced flue terminals Condense Tap drain 600mm Minimum clearence... -
Page 26: Standard Flue System Dimensions - Cwh 90 & 120
26 26 SECTION 3 • INSTALLATION CWH90 & CWH120 STANDARD FLUE SYSTEM DIMENSIONS MAXXfl o Water Heater... -
Page 27: Flue Systems - Cwh 30
INSTALLATION • SECTION 3 27 27 FLUE SYSTEMS Fig 11 Terminal Positions with Minimum Distance Directly below an opening, air brick, opening window etc. Above an opening, air brick, opening window etc Horizontal to an opening, air brick, opening window etc. Below a gutter or sanitary pipework Below the eaves Below a balcony or carport roof... -
Page 28: Flue System - Horizontal And Vertical Terminations
28 28 SECTION 3 • INSTALLATION FLUE SYSTEMS Fig 12 MAXXfl o Water Heater... -
Page 29: Air Supply And Ventilation Concentric Flue Systems
INSTALLATION • SECTION 3 29 29 AIR SUPPLY AND VENTILATION CONCENTRIC FLUE SYSTEMS Air vents should have negligible resistance and must Th e following notes are intended to give guidance: not be sited in any apposition where they are likely to be Where the heater is to be installed in a room, NO VENTS easily blocked or fl... -
Page 30: Alternative Flue Systems - Cwh 30
SECTION 3 • INSTALLATION AIR SUPPLY AND VENTILATION CONCENTRIC FLUE AIR SUPPLY AND VENTILATION CONVENTIONAL SYSTEMS FLUE SYSTEMS IMPORTANT For all installations, please refer to the table below for calculating requirements. Detailed recommendations for 1. Th e effective area requirements specifi ed in the table are the air supply are given in BS5440, Part 2, and BS6644 and related to the maximum heat input of the heater(s) and in IGE/UP/10, Pt 1. -
Page 31: Air Supply And Ventilation - Conventional Fl Ue Systems
INSTALLATION • SECTION 3 31 31 AIR SUPPLY AND VENTILATION CONVENTIONAL FLUE SYSTEMS Th e minimum effective areas of the permanent air vents require in the compartment are as follows: Air Vents Areas Position of Air Vents Air from Room or Internal Space Air Direct from Outside High Level 10cm... -
Page 32: Heat Exchanger Confi Guration
32 32 SECTION 3 • INSTALLATION CWH HEAT EXCHANGER CONFIGURATION Th e water heater is equipped with 1, 2, 3 or 4 burner modules depending on the model. Each burner module has its own automatic burner. CONTROL PANEL Th e operational status of the water heater can be seen and the desired temperature can be set on the control panel (Fig 13, right) -
Page 33: Water Temperature Settings
WATER TEMPERATURE SETTING - SECTION 4 33 33 WATER TEMPERATURE SETTING TEMPERATURE SETTING Th e water heater temperature can be set between 40°C and 70°C using the + and – buttons on the control panel. Th e maximum temperature for the Legionella fl... -
Page 34: Instructions For Commissioning
34 34 SECTION 5 • INSTRUCTIONS FOR COMMISSIONING FILLING THE WATER HEATER CO 2 ADJUSTMENT 1. Check that the tank drain tap is closed Th e correct proportion of gas and air can be controlled 2. Check that the return valve in the 28mm pipe (close to based on the CO 2 percentage in the fl... -
Page 35: Control And Adjustment At Full Load
INSTRUCTIONS FOR COMMISSIONING • SECTION 5 35 35 CONTROL AND ADJUSTMENT AT FULL LOAD CONTROL AND ADJUSTMENT AT LOW LOAD 1. Switch the water heater off and fl ush system until the 1. Select low load with the – button. When the actual tank is completely cooled down burner capacity is above 25%, the CO 2 percentage can be measured and set. -
Page 36: Fault Codes
36 36 SECTION 6 • FAULT CODES FAULT CODES A fault code will appear in the control panel display if there Lockout faults can be reset using the reset button. Only is a lockout failure. A letter and the number of the burner the burner module for which the fault code appears in the module appear alternately in the display. -
Page 37: Maintenance
MAINTENANCE • SECTION 7 37 37 MAINTENANCE At least once a year, the following works must be 6. If the water heater is to be drained for any reason, carried out: fi rst take the water heater out of operation and then proceed as follows: 1. -
Page 38: External, Internal & Cylinder Spares
38 38 SECTION 8 • PARTS LIST SPARE LIST FOR CWH RANGE MAXXfl o EXTERNAL & CYLINDER SPARES ITEMS MAXXfl o Water Heater... - Page 39 PARTS LIST • SECTION 8 39 39 MAXXfl o INTERNAL SPARES ITEMS MAXXfl o Water Heater...
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Page 40: Flue And Old Issue Spares
40 40 SECTION 8 • PARTS LIST MAXXfl o FLUE SPARES ITEMS MAXXfl o Water Heater... - Page 41 PARTS LIST • SECTION 8 41 41 MAXXfl o OLD ISSUE SPARES ITEMS MAXXfl o Water Heater...
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Page 42: Parts List
Storage Vessel – 300 Litre E652 Brass Tee 22 x 22 x ½” 5141514 Tank Temperature Sensor & Lead E664 Tundish C384 Andrews Dome Label E856 Condensate Trap E211 MAXXfl o Dome Label E927 Front Cover (pump facing rear) pre-serial no. 071201 E918 Front Cover (pump facing front) from serial no. -
Page 43: Dismantling Disposal And Recycling
DISMANTLING, DISPOSAL AND RECYCLING • SECTION 9 43 43 DISMANTLING, DISPOSAL AND RECYCLING WARNING: Only competent qualifi ed persons should remove or dismantle the appliance. Before removing and dismantling please ensure you safely remove the power supply and isolate the appliance from the water and gas connections.