Lochinvar ECOKNIGHT EKW116CE Installation Manual Download

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21.6.3

MAXIMUM

CASCADE

SET

POINT

This parameter determines the set point used by the individual water heaters in a Cascade when a system sensor is connected to

the Leader water heater. When a water heater is commanded to fire by the Leader water heater, it will attempt to achieve this

temperature at its outlet. The Leader water heater will limit the modulation of the water heater(s) in order to hold the temperature at

the system supply sensor to the user set point. If any of the water heater outlet temperatures reach the maximum cascade set

point, that water heater will then modulate down on its own in order to keep its outlet temperature within the maximum cascade set

point. Therefore, this parameter can be used to limit the outlet temperatures of all the water heaters in a Cascade this parameter

is adjustable by the installer by accessing the Maximum Cascade Set Point parameter. The temperature range of this parameter is

0°C to 88°C. The default maximum cascade set point is 85°C.

21.6.4

CASCADE

OFFSET

This parameter determines how much the temperature must go above set point before the lead water heater will turn off. This

parameter can be adjusted by the installer by accessing the Cascade Offset parameter. The temperature range of this parameter

is 0° to 11°C the default value is 6°C.

21.6.5

CASCADE

DIFFERENTIAL

This parameter determines how much the temperature must go below the turn off temperature (Set point + Offset) before the lead

water heater turns on. This parameter can be adjusted by the installer by accessing the Cascade Differential parameter. The

temperature range of this parameter is 0°C to 33°C the default value is 11°C.

21.6.6

CASCADE

TYPE

(L/L

EFF)

There are two (2) options for the way a Cascade divides the load between its heaters. The first is Lead/Lag, designated as L/L in

the menu. This method is used when it is desired to have the least amount of total flow through the water heaters. This method

will modulate the last two (2) water heaters that are firing. This provides for smooth transitions when a water heater turns on or off.

When the last water heater reaches 100% and the calculated load is still increasing, it will start the next water heater at 20% and

reduce the previous water heater to 80%, thus eliminating the sudden jump in total output of the Cascade. When the calculated

load is decreasing and the last water heater gets down to 20% fire, it will hold it there and start lowering the firing rate on the next-

to-last water heater. When the next-to-last water heater reaches 20%, it will turn the last water heater off and raise the rate of the

next-to-last water heater to40%, thus eliminating the sudden drop in total output of the Cascade.

The other Cascade divider method is Efficiency Optimization, designated as EFF in the menu. This method is used, as the name

implies, when it is desired to have the most efficient system. When the first water heater reaches 100% rate, it lowers its rate to

50% and turns on the next water heater at 50%. The two (2) water heaters then modulate at the same rate. As the calculated load

increases further and both water heaters ramp up to 100%, it lowers the rate of the first two (2) water heaters to 67% and brings

the next water heater on at 67%. The three (3) water heaters then modulate together. As the calculated load decreases, the water

heaters will reach 20%, at which time the last water heater (the third in our example) will turn off and the Cascade will increase the

rates of the remaining water heaters to provide the equivalent total output as before ((3 x 20%) / 2= 30% in our example).

Efficiency optimization is automatically selected when water heaters of different sizes are programmed into the Leader control (see

21.6.11).

21.6.7

MINIMUM

ON/OFF

TIME

In order to prevent units in a Cascade from short cycling, this parameter defines the minimum ON and OFF time for each unit.

The installer can adjust this time by accessing the Minimum On/Off Time parameter. The minimum setting is 0 seconds and the

maximum setting is 10 minutes. The default is 30 seconds.

21.6.8

MINIMUM

NEXT

TIME

In order to reduce the risk of temperature overshoot with a Cascade, this parameter defines the minimum time delay from starting

one unit until the next unit may be started. The installer can adjust this time delay by accessing the Minimum Next on Time

parameter. The minimum setting is 0 minutes and the maximum setting is 10 minutes. The default is 60 seconds.

21.6.9

MINIMUM

NUMBER

PUMPS

When the water heater is a Cascade Leader, it can force a minimum number of water heater pump outputs to be on continuously,

regardless of how many water heaters are firing. This is normally used when the water heaters are piped in a full-flow

configuration, and the water heater pump outputs are controlling isolation valves. The Leader will force the water heater pump

output on the highest priority water heater to turn on first, then the water heater pump output on the second highest priority water

heater, and so forth, until the minimum number of pump outputs are turned on. The range of this parameter is 0 to 8. The default

value is 0.

Summary of Contents for ECOKNIGHT EKW116CE

Page 1: ... EKW46CE EKW61CE EKW86CE ECOKNIGHT FLOOR STANDING GAS FIRED CONDENSING CIRCULATING TYPE WATER HEATER Installation Commissioning Maintenance and User instructions installation manual_ecoknight 46 86_january2018 ...

Page 2: ...N 26 10 15 TYPE C43 U DUCT 31 10 16 C53 TWIN PIPE FLUE SYSTEMS 31 10 17 TYPE B23 CONVENTIONAL FLUE WITH FAN ASSISTANCE 36 10 18 C63 Certified Flue Systems 37 11 0 AIR SUPPLY 38 11 1 COMBUSTION VENTILATION 38 11 2 COOLING VENTILATION 38 12 0 WATER CONNECTIONS 39 12 1 GENERAL 39 12 2 OPEN VENTED SYSTEM ARRANGEMENT 40 12 3 UN VENTED SYSTEM ARRANGEMENT 40 12 4 CIRCULATING PUMPS 41 12 5 PRIMARY PIPEWOR...

Page 3: ...THE SYSTEM 69 19 8 OTHER CHECKS 69 20 0 SMART SYSTEM CONTROL SETTINGS 70 20 1 DISPLAY PANEL ACCESS MENU 70 20 2 PARAMETER SETTING 71 21 0 VIEWABLE AND CHANGEABLE CONTROL PARAMETERS 74 21 1 GENERAL 74 21 2 DATA LOGGING 75 21 3 FUNCTIONS 75 21 4 DHW SETTINGS 75 21 5 ANTI CYCLING 76 21 6 CONTROL MODES 76 21 7 BUILDING MANAGEMENT SYSTEM BMS 78 21 8 CIRCULATION PUMPS 79 21 9 SERVICE NOTIFICATION 80 21 ...

Page 4: ...th the water heater This equipment is intended for use on Group H Natural Gas 2nd Family and LPG propane 3rd Family The information relating to propane firing is to be found in Section 18 0 LPG FUEL This equipment MUST NOT use gas other than that for which it has been designed and adjusted This equipment must be installed by a competent person registered with a H S E approved body All installation...

Page 5: ...er certification becomes invalid Commissioning maintenance and repair must be done by a skilled installer engineer according to all applicable standards and regulations 2 1 GENERAL DESCRIPTION OF SAFETY SYMBOLS USED BANNED A black symbol inside a red circle with a red diagonal indicates an action that should not be performed WARNING A black symbol added to a yellow triangle with black edges indica...

Page 6: ...to do so Lochinvar Limited is not liable for any damage caused by inaccurately following these installation instructions Only original parts may be used when carrying out any repair or service work This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have been given supervision or i...

Page 7: ... 3 4 or 1 depending on the model This pipe should be connected to the incoming gas supply for the purpose of delivering gas to the boiler 15 SMART Control Module The SMART Control responds to internal and external signals and controls the fan gas valve and pumps to meet the demand Not Shown in 3 1 2 16 Manual air vent Designed to remove trapped air from the heat exchanger coils Not Shown in 3 1 2 ...

Page 8: ...8 3 1 2 PRINCIPLE PARTS SHOWN TO BE USED WITH 3 1 1 FRONT VIEW ALL MODELS REAR VIEW MODELS EKW46CE EKW61CE REAR VIEW MODELS EKW86CE LEFT SIDE VIEW MODELS EKW86CE ...

Page 9: ...25 Minimum gas inlet pressure mbar 17 5 Gas flow rate m3 hr 4 2 5 9 8 Flue gas mass rate 9 0 CO2 g sec 16 22 3 30 4 Gas inlet connection size BSP GAS DATA G31 Nominal gas inlet pressure mbar 37 Maximum gas inlet pressure mbar 45 Minimum gas inlet pressure mbar 27 Gas flow rate m3 hr m3 hr 1 7 2 3 3 1 Flue gas mass rate 10 5 CO2 g sec 16 7 23 2 31 6 Gas inlet connection size BSP ELECTRICAL DATA Pow...

Page 10: ...awings showing connection sizes and positions are available from Lochinvar Technical Support 5 1 1 DIMENSIONAL DRAWING EKW46CE EKW61CE 5 1 2 DIMENSIONAL DRAWING EKW86CE Dimension Unit Model EKW46CE EKW61CE EKW86CE A mm 845 845 1080 B mm 457 565 502 C mm 701 701 641 D mm 394 394 394 ...

Page 11: ...11 5 2 CLEARANCES 5 2 1 ENCLOSURE INSTALLATION CLEARANCES MM 5 2 2 PLANT ROOM INSTALLATION CLEARANCES MM 400 400 ...

Page 12: ...and maintenance of flues and ventilation for gas appliances of rated input not exceeding 70 kW net 1st 2nd and 3rd family gases Specification for installation and maintenance of ventilation for gas appliances BS 6644 2011 Specification for Installation of gas fired hot water Heaters of rated inputs between 70 kW net and 1 8 MW net 2nd and 3rd family gases BS EN 806 1 5 Specifications for installat...

Page 13: ...5440 2 or BS6644 as appropriate The Lochinvar EcoKnight can also be used as a type B23 open flue appliance If such a configuration is to be used then appropriate ventilation for cooling and combustion must be provided For further details please refer to Section 11 0 or to BS5440 2 or BS6644 as appropriate 8 2 GENERAL REQUIREMENTS Corrosion of the heat exchanger coils and flue system may occur if a...

Page 14: ...adequate to deal with the rate of gas supply required 9 3 GAS SUPPLY PIPES Supply pipes must be fitted in accordance with IGE UP 2 Pipework from the meter to the equipment must be of adequate size The complete installation must be purged and tested as described in IGE UP 1 Refer to Section 18 0 LPG FUEL for information on LPG pipework installation guidance 9 4 BOOSTED SUPPLIES Where it is necessar...

Page 15: ...ossible risk of ice building up on surrounding parts structures because the condensate will freeze This risk should be taken into account during the design phase of the heating installation EcoKnight Water heaters will produce large condense clouds especially during cold weather consideration must be taken as to whether this will cause a nuisance to neighbouring properties and if so alternative fl...

Page 16: ... the exhaust components 10 3 FLUE DISCHARGE The flue system must ensure safe and efficient operation of the equipment to which it is attached protect the combustion process from wind effects and disperse the products of combustion to open external air The flue must terminate in a freely exposed position and be so situated as to prevent the products of combustion entering any opening in a building ...

Page 17: ...ny level 300 300 J From a surface facing the terminal 600 1000 K From a terminal facing the terminal 1200 2000 L From an opening in the car port e g door window into the dwelling 1200 1200 M Vertically from a terminal on the same wall 1500 1500 N Horizontally from a terminal on the same wall 300 600 P From a vertical structure on the roof 300 300 Q Above intersection with the roof 300 300 10 4 2 F...

Page 18: ... sensor This must be fitted during the installation of the flue system Failure to do so may lead to severe personal injury death or substantial property damage The water heater must not be operated unless the complete flue system is installed This includes the water heater connections concentric adaptor if required flue pipes air ducts if required and terminals If discharging at low level a suitab...

Page 19: ... either a vertical or horizontal concentric terminal will be included in the packaging with the transition kit additional elbows flue lengths etc Are available as ancillary items Additional wall brackets may be required to ensure the flue system is stable For a full list of flue components supplied and optional parts to complete the system see the EcoKnight flue guide available at www Lochinvar lt...

Page 20: ...r intake transition Item 4 into the intake connection reducer shown below and tighten the worm drive clip 4 To the bottom exhaust connection of the concentric adaptor fit one of the 80mm 90 elbows and then fit the 80mm x500mm flue pipe cut to length as in Section 1 1 1To the side intake connection of the concentric adaptor fit the remaining 90 elbows 5 Fit the Concentric adapter item 3 to the exha...

Page 21: ...l brackets may be required to ensure the flue system is stable For a full list of flue components supplied and optional parts to complete the system see the EcoKnight flue guide available at www lochinvar ltd uk ITEM NUMBER DESCRIPTION EKW 86 1 90 ELBOW 3 REQUIRED 2 45 ELBOW 1 REQUIRED 3 SAMPLING POINT 1 REQUIRED 4 CONCENTRIC ADAPTOR 1 REQUIRED 5 AIR INTAKE TRANSITION 1 REQUIRED 6 a 100mm X 500mm ...

Page 22: ...t the air intake transition Item 5 into the intake connection reducer and tighten the worm drive clip 4 To the bottom exhaust connection of the concentric adaptor fit one of the 80mm 90 elbows and then fit the 80mm x500mm flue pipe cut to length as in Section 10 9 2 5 To the side intake connection of the concentric adaptor fit the remaining 90 elbows 6 Fit the Concentric adapter item 3 to the exha...

Page 23: ...LET TRANSITION Ø80mm ALU 4 1 M85271 EXTENSION Ø80mm 500mm PP CUT TO LENGTH 5 1 M84460 CONCENTRIC BEND 90 Ø80 125mm PP 6 1 M86934 CONCENTRIC HORIZONTAL TERMINAL Ø80 125mm PP NO WALL PLATES 7 1 M28925 TERMINAL WALL PLATES PAIR 8 1 Item No EKWHF002 CONCENTRIC HORIZONTAL FLUE ASSEMBLY MODELS EKW86CE COMPONENTS INCLUDED Item No Description Number Quantity M85181 BEND 90 100mm PP 1 3 M85182 BEND 45 100m...

Page 24: ...e outer wall plate or rosette should be flush to the wall see 10 11 1 Once cut remove all burrs and sharp edges 4 Insert the terminal into the drilled hole The terminal section should be installed level or with a fall to outside Max 10mm per metre to prevent the ingress of water When inserting the terminal ensure the air intake section is at the bottom 5 Fill the void between the terminal and wall...

Page 25: ...R INLET TRANSITION Ø80mm ALU 4 1 M85271 EXTENSION Ø80mm 500mm PP CUT TO LENGTH 5 1 LV310744 CONCENTRIC EXTENSION Ø80 125mm 280 395mm PP TELESCOPIC 6 1 M86864 CONCENTRIC VERTICAL TERMINAL Ø80 125mm PP 7 1 Item No EKWVF002 CONCENTRIC VERTICAL FLUE ASSEMBLY MODELS EKW86CE COMPONENTS INCLUDED Item No Description Number Quantity M85181 BEND 90 100mm PP 1 3 M85182 BEND 45 100mm PP 2 1 M84421 SAMPLING PO...

Page 26: ... drilled from the outside to ensure that no damage is done to the roofing material Extra care should be taken to ensure that the hole is drilled vertically 4 Install the roof flashing and secure as appropriate 5 Carefully insert the roof terminal through the roof flashing and hole in the roof When inserting the roof terminal do not support or turn the terminal using the cap 6 Ensure the terminal i...

Page 27: ...3 GENERAL CONCENTRIC FLUE SYSTEM INSTALLATION GUIDELINES The information in this section is for General guidance only and may not fully represent the installation on site Do not drill and screw into flue system ...

Page 28: ...28 Max distance between brackets ...

Page 29: ...29 ...

Page 30: ...30 ...

Page 31: ...MPERATURE CLASS T120 FLUE GAS MATERIAL PP Each Twin Pipe starter assembly includes the items shown in the tables below Item No EKWTF001 TWIN PIPE FLUE STARTER ASSEMBLY Kit contains components to start the connection to the appliance only MODELS EKW46CE EKW61CE COMPONENTS INCLUDED Item No Description Number Quantity M75256 AIR INLET TRANSITION Ø80mm ALU 1 1 M85279 SAMPLING POINT Ø80mm PP 2 1 Item N...

Page 32: ...y exceed the maximum temperature rating of the flue and can lead to severe personal injury death or substantial property damage Typical Twin Pipe flue arrangement EKW46 EKW61CE Typical Twin Pipe flue arrangement EKW86CE To install a Type C53 terminal or air inlet the procedure for either a Type C13 horizontal or a Type C33 vertical terminal should be followed noting that the annular space of the t...

Page 33: ...33 10 16 1 GENERAL TWIN PIPE INSTALLATION GUIDELINES The information in this section is for General guidance only and may not fully represent the installation on site ...

Page 34: ...34 ...

Page 35: ...35 ...

Page 36: ...o Description Number Quantity M75257 AIR INLET TRANSITION Ø100mm ALU 1 1 M86787 APPLIANCE AIR INLET GUARD Ø100mm 2 1 M85189 SAMPLING POINT Ø100mm PP 3 1 The above is a kit of components to facilitate conventional flueing of the appliance and must be fitted prior to fitting any other flue components 1 Insert the exhaust transition into the exhaust port of the water heater 2 Insert the flue temperat...

Page 37: ...to condensate Corrosion resistance class Metal liner specifications Soot fire resistance class Distance to combustible material Plastics location Plastics fire behaviour Plastics enclosure min eis PP EN 14471 T120 P1 W 1 O 30 I of E C E L min eis RVS EN 1856 1 T120 P1 W 1 L20040 O 40 10 18 1 C63 FLUE SYSTEM SPECIFICATION Material Water heater dnom Doutside dinside Linsert PP EKW46 CE 80 80 0 6 50 ...

Page 38: ...nput Gross kW Input Net kW Plant Room Enclosure Low Summer Use Medium Summer Use High Summer Use Low Summer Use Medium Summer Use High Summer Use High cm2 Low cm2 High cm2 Low cm2 High cm2 Low cm2 High cm2 Low cm2 High cm2 Low cm2 High cm2 Low cm2 EKW86CE 83 5 75 3 152 304 228 380 304 456 380 760 456 836 532 912 11 1 2 COMBUSTION VENTILATION REQUIREMENTS EKW86CE 11 2 COOLING VENTILATION When used ...

Page 39: ...ndations for the water circulation system are given in BS6644 and CP 342 The following notes are of particular importance 1 EcoKnight must be used with a direct type storage vessel LST Contact Lochinvar Limited for help in sizing the storage vessel 2 Circulating pipework not forming part of the useful heating surface should be insulated Cisterns expansion vessels and pipework situated in areas exp...

Page 40: ...YSTEM 12 3 UN VENTED SYSTEM ARRANGEMENT If the Lochinvar EcoKnight is to be used in an unvented arrangement the system should follow the guidance given in BS6700 and must comply with The Building Regulations Part G3 in England and Wales P5 in Northern Ireland and P3 in Scotland A kit of components that have been suitably sized for the unvented or boosted operation of the appliance is available fro...

Page 41: ...bows 2 x Unions 2 x Full bore lever ball valves 2 x Tee fittings cold feed building return For longer distances or a greater number of fittings the pump may have to be resized The specification of this type of pump ensures that the bronze body and associated parts in contact with water are suitable for potable use A glanded construction is required to ensure that any scale in the system does not b...

Page 42: ...5mm 2 units the common header shown in red should be sized according to the table at 42mm with the pipework between the header and each individual units shown in blue at 35mm MODEL PIPEWORK A BLUE SIZE mm PIPEWORK B RED SIZE mm NUMBER OF ECOKNIGHT 1 2 3 4 EKW46CE 35 42 54 67 EKW61CE 35 42 54 67 EKW86CE 54 54 67 76 12 5 1 PIPEWORK HEADER SIZES 12 5 2 PIPEWORK SCHEMATIC SHOWING PIPEWORK A AND PIPEWO...

Page 43: ...only the lead water heater and alternate lead have tank sensors fitted see 1 1 1 The lead water heater will monitor the tank temperature and control the water heaters within the cascade in the event of a failure of the lead water heater then the alternate leader will take over control of the system hence it is also required to have a tank sensor fitted It may not be possible to fit two sensors int...

Page 44: ...ses where information is provided the customer must assess and manage risks associated with the technical information and advice provided SYMBOL DESCRIPTION IV ISOLATION VALVE LSV LOCKSHIELD VALVE TPRV TEMPERATURE AND PRESSURE RELEIF VALVE TD TUNDISH EXV EXPANSION VESSELQ EV EXPANSION VALVE PRV PRESSURE REDUCING VALVE NRV NON RETURN VALVE PCP PRIMARY CIRCULATING PUMP TS TEMPERATURE SENSOR VESSEL S...

Page 45: ...sor point on the LST direct storage vessel This arrangement gives close temperature control and is particularly suitable for installations with a constant low level demand such as leisure centres The EcoKnight water heater shunt pump will continue to run for a short period after the burner has stopped firing to clear any residual heat from the heat exchanger See 21 8 1 14 1 1 STANDALONE INSTALLATI...

Page 46: ...monitored by a BMS sensor shutting the EcoKnight water heater down when the vessel is at set point This application gives greater control and is suitable for installations when the DHW demand is intermittent such as hotels The EcoKnight water heater shunt pump will continue to run for a short period after the burner has stopped firing to clear any residual heat from the heat exchanger See 21 8 1 1...

Page 47: ...s working with a single tank sensor The water heaters would be put into cascade the supplied tank sensor is installed within the sensor point on the LST direct storage vessel and connected back to the lead water heater The alternate leader has a strap on sensor fitted to the pipework 14 2 1 MULTIPLE WATER HEATERS SINGLE VESSEL ALTERNATE WITH STRAP ON SENSOR ...

Page 48: ...e how many member water heaters to activate and at what firing rate depending upon information received from the tank sensor This will increase the system efficiency as this closer control prevents the water heaters cycling at low demand The water heaters should be piped on a reverse return arrangement 1 1 1 MULTIPLE WATER HEATERS WITH CASCADE CONTROL ALTERNATE WITH ADDITIONAL TANK SENSOR FITTED ...

Page 49: ...ould be installed as shown below utilising a reverse return pipework arrangement to ensure an even temperature distribution between the vessels The water heaters should be put into cascade with the lead water heater monitoring the tank temperature Due to the fact there is more than one vessel the alternate lead can have a sensor in one of the additional tanks 14 4 1 MULTIPLE WATER HEATERS WITH MUL...

Page 50: ...tem either utilising a simple on off arrangement or by directly modulating the output The Water Heater has the following inputs outputs Building Management System BMS 0 10VDC analogue input Volt free burner on runtime signal Volt free lock out alarm signal 0 10V burner firing rate 0 10V Water Heater pump speed 24VAC auxiliary device enable signal e g to start fan dilution system The EcoKnight Wate...

Page 51: ...voltage to below the minimum voltage below 2V in this example and the water heater will have no demand It is possible to vary your set point using this method by altering the voltage supplied to the 0 10V input you may wish to have a set point of 70 C at 10V and then run the unit at say 8V to achieve 60 C and then to run a pasteurisation cycle lift the voltage to 10V thus increasing the set point ...

Page 52: ...ll be required DE STRAT NO OUTPUT CONNECTION NOT USED RETURN 230VAC Constant output when unit powered MAX 190 WATTS 230 VAC Live Neutral and Earth connections for a secondary circulation pump If the pump rating exceeds the maximum 190 watts available over the three terminals the Live and Neutral connections should then be used to switch a suitable starter overload relay MAINS Connections for a 230...

Page 53: ...n please refer to Section 13 0 The Tank thermostat can be used as an enable when a tank sensor is fitted and the BMS Thermostat is enabled see section 15 2 1 The tank sensor terminals 29 30 is still used for temperature control the thermostat connection just used to enable 17 18 HEAT LOOP DEMAND 3 24VAC Output constant when unit is powered This connection should not be used with a water heater 19 ...

Page 54: ...lting hole must be blocked with an appropriate anchor plug or grommet to prevent accidental access to the live parts within the water heater 15 6 FUSES The EcoKnight has three internal fuses All are slow blow fuses located and rated as follows 15 6 1 FUSE RATINGS AND LOCATIONS The EcoKnight has three internal fuses All are slow blow fuses located and rated as follows F1 5 A F2 3 15A F3 80A The wat...

Page 55: ...55 15 8 WIRING DIAGRAM 15 8 1 WIRING DIAGRAM ...

Page 56: ...56 15 9 LADDER DIAGRAM 15 9 1 LADDER DIAGRAM ...

Page 57: ...dial in the centre MENU Left SELECT key SETPOINTS NAVIGATION dial pressing down SHDN Right SELECT key The smart system control face instantly informs the user of the status of the Water Heater by changing colour according to the status of the Water Heater as below Normal operation Service required Water heater Locked out 16 3 ACCESS MODES 16 3 1 USER The user can adjust tank target temperatures by...

Page 58: ...r to press the RIGHT SELECT key when programming is completed in order to save the changes made Operation Display 1 Upon a call for heat the gas pressure switch s must be closed 2 Once the gas pressure switch s are closed the control turns on the appropriate pumps The flow switch and or LWCO must close 3 The control turns on power to the louvre relay the louvre proving switch and blocked drain swi...

Page 59: ... it holds the firing rate steady for a few seconds then begins to modulate the firing rate based on a set point or some other command such as the 0 10v signal 8 Once the call for heat is satisfied the control will turn off the burner The fan will continue to run during the post purge period 9 Any pumps that are running will continue for their respective pump overrun time period before switching of...

Page 60: ...roducts SHUTDOWN The unit is in the OFF position SETPOINT MET The control temperature has exceeded the set point and offset BLOCKED The unit has detected a condition that has temporarily interrupted the call for heat B Call for heat indicators DHW tank sensor has called for heat The unit is being controlled by a 0 10V BMS signal The member unit is supplying heat whilst in Cascade mode Section Disp...

Page 61: ...T SETBACK b TRIGGER 2 next DHW night setback trigger Section Display Description D LEFT SELECT key function USB Press the LEFT SELECT key to access the USB and installer menu E NAVIGATION dial function MODIFY Pressing the NAVIGATION dial will allow the installer to change the text F RIGHT SELECT key function SHDN Press the RIGHT SELECT key to turn the water heater off ON Press the RIGHT SELECT key...

Page 62: ...t personnel involved are aware of what action is about to be taken and begin by making the following checks 1 Flue way passages are clear 2 Adequate ventilation exists in the plant room if necessary 3 The system is fully charged with water ready to receive heat All necessary valves are open and all allied pumps are circulating water 4 The gas supply pipework is clear of any loose matter tested for...

Page 63: ...uri will invalidate the warranty Combustion figures should be as follows Model No CO2 CO EKW46CE 9 0 0 5 100 ppm EKW61CE 9 0 0 5 100 ppm EKW86CE 8 8 0 5 100 ppm 17 4 5 NATURAL GAS COMBUSTION FIGURES If the combustion figures are not within the range specified contact Lochinvar Technical Support for further guidance Combustion figures for Propane firing can be found in Section 18 0 LPG FUEL 17 5 TE...

Page 64: ...normal working hours 17 9 INSTALLATION NOISE If care has been taken to follow the manufacturer s instructions there should be no discernible noise from the equipment The allied pump motor may have a level of sound that could lead to consideration for acoustic insulation but care must be taken not to impede ventilation or airflow to the pump motor 18 0 LPG FUEL Note It is strongly recommended that ...

Page 65: ...8 2 2 EKW46CE EKW86CE 1 Remove the top and front access covers from the unit no tools required for removal 2 Remove the impulse tube and wiring plug from the gas valve 3 Remove the three cap head screws securing the gas valve to the venturi 4 Locate the propane orifice disk from the conversion kit bag Verify that the stamping on the orifice disk is correct for the water heater see 18 2 1 Place the...

Page 66: ...CHECKS The Lochinvar EcoKnight series are supplied with a pre set gas air ratio inlet assembly This must not be tampered with Any attempt to adjust the gas valve or venturi will invalidate the warranty Combustion figures should be as follows Model No CO2 CO EKW46CE 10 5 0 5 100 ppm EKW61CE 10 5 0 5 100 ppm EKW86CE 10 5 0 5 100 ppm 18 3 2 LPG COMBUSTION FIGURES If the combustion figures are not wit...

Page 67: ...in operational characteristics 19 2 MAINTENANCE SCHEDULE The water heater has a built in function that reminds the user that routine maintenance is due As a default this is set to 12 months 10 000 operational hours or 10 000 ignition cycles Lochinvar recommends that this be the maximum service interval 19 3 BURNER INSPECTION The heat exchanger has a sight glass for inspection of the flame picture ...

Page 68: ...NGER To clean the heat exchanger the following procedure should be carried out 1 Remove the burner as above 2 Use a vacuum cleaner to remove any accumulation on the heating surfaces Do not use any solvent 3 Finish cleaning using a clean cloth dampened with warm water 4 Reinstall the burner 5 Close isolation valves on piping to isolate the appliance from the system Attach a hose to the appliance dr...

Page 69: ...operation To check the valve the manual override lever should be operated several times The valve should seat properly and operate freely If water does not flow drain the water heater remove the inoperative valve and inspect for obstructions or corrosion Replace with a new valve of equivalent size as necessary 19 8 3 FLUE SYSTEM Examine the exhaust and air intake system at least once a year Points...

Page 70: ...hown below Only suitably qualified engineers should alter the settings and parameters within the EcoKnight water heater Incorrect settings could lead to operational problems within the water heater These problems would not be covered under the EcoKnight water heater warranty 20 1 1 DISPLAY PANEL ACCESS MENU 0000 5000 5300 5309 ...

Page 71: ... Yes Yes DATA LOGGING Reset Last 10 Errors 21 2 No Yes Service Mode Delay 21 3 No Yes Freeze Protection Pump On 21 3 No Yes FUNCTIONS Freeze Protection Burner On 21 3 No Yes Freeze Protection Burner Differential 21 3 No Yes Tank Set Point 21 4 Yes Yes Tank Set Point Differential 21 4 No Yes DHW SETTINGS DHW Recirc Pump Offset 21 4 No Yes DHW Recirc Pump Differential 21 4 No Yes Tank Minimum Set Po...

Page 72: ...de Outlet Set Point Cascade Offset Cascade Differential Cascade Type L L Eff Minimum On Off Time Minimum Next On Time Minimum Pumps On Water heater Size 21 6 No Yes i Cascade Address ii Type ii Type iii Input BMS BMS Active Inactive IF Active i BMS Type Power Set Point IF Power 1 Power at Minimum Volts 2 Power at Maximum Volts ELSE 1 Set Point at Minimum Volts 2 Set Point at Maximum Volts ii Minim...

Page 73: ...er Phone Number 21 9 No Yes BASIC SETUP Time Date 21 10 No Yes Cascade Address IF Address 0 i Maximum Cascade Set Point ii Cascade Offset 21 10 iii Cascade Differential No Yes iv Cascade Type L L EFF BMS Active Inactive IF Active i BMS Type Power Set Point IF Power 1 Power at Minimum Volts 2 Power at Maximum Volts ELSE 1 Set Point at Minimum Volts 21 10 2 Set Point at Maximum Volts ii Minimum Volt...

Page 74: ... NIGHT SETBACK OFFSET Once the unit s internal clock has been set correctly the Night Setback feature can be used to program a lower set point during unoccupied times When in night setback the control reduces the set point by a fixed amount For DHW it subtracts the DHW night setback offset from the tank set point Tank Set point parameter The DHW night setback will not work without a tank sensor in...

Page 75: ...minutes 21 3 2 FREEZE PROTECTION PUMP ON The SMART SYSTEM control will turn on the water heater and system pump outputs whenever the inlet temperature drops below this setting This is done to prevent the water in the heat exchanger from freezing Certain low temperature applications such as snow melt can operate at temperatures around freezing so this setting needs to be lowered in these cases The ...

Page 76: ... and anti cycling will be shown in the display until the time has elapsed or the water temperature drops below the Anti Cycling Override Differential parameter This parameter can be changed by the installer by accessing the Anti Cycling Time parameter The time range for this parameter is 1 minute to 10 minutes The default value is 1 minute 21 5 2 ANTI CYCLING OVERRIDE DIFFERENTIAL The control will...

Page 77: ...rate on the next to last water heater When the next to last water heater reaches 20 it will turn the last water heater off and raise the rate of the next to last water heater to40 thus eliminating the sudden drop in total output of the Cascade The other Cascade divider method is Efficiency Optimization designated as EFF in the menu This method is used as the name implies when it is desired to have...

Page 78: ...T HOME key to save the new settings and return to the Status screens The SMART SYSTEM control automatically uses the Efficiency Optimisation Cascade type when controlling water heaters of different sizes 21 7 BUILDING MANAGEMENT SYSTEM BMS 21 7 1 BMS The set point or modulation of the water heater may be controlled through the 0 10V BMS input BACnet or ModBus When the BMS parameter is set to INACT...

Page 79: ...er is enabled The minimum value is 0 5V and the maximum is 10 0V The default value is 2 0V 21 7 11 OFF DIFFERENTIAL VOLTS When programmed for BMS control through the 0 10V BMS input or through ModBus BACnet and the BMS Thermostat Input is set to INACTIVE the Off Differential Volts parameter determines how far below the On Volts setting the 0 10V BMS input voltage must be in order to disable the wa...

Page 80: ...is parameter is 0 cycles to 100 000 cycles The default is 50 000 cycles RESET MAINTENANCE REMINDER Once servicing has been completed the service notification counter should be reset This parameter can be reset by the installer by accessing the Reset Maintenance Reminder parameter Once accessed press the RESET key to reset the service notification counter 21 9 4 SERVICE NAME AND PHONE NUMBER Please...

Page 81: ...list of parameter files Press the EXIT key to return to the Main Menu If you wish to copy a parameter file from the flash drive into the Smart System control rotate the NAVIGATION dial until the file you wish to copy is selected Press the NAVIGATION dial once The display will ask you if you want to load the parameters from the file you selected You can press NO to cancel the operation or press YES...

Page 82: ... FOR LIGHTING 7 Ensure that the gas inlet appliance isolating valve provided by the installer is in the off position 8 Press the power rocker switch positioned on the back of the appliance to bring the equipment on 9 The combustion fan should ramp up to full speed to purge the combustion chamber and then drop back to half rate in order to light As the gas inlet appliance isolating valve is closed ...

Page 83: ...ure is controlled by a tank sensor supplied with the water heater the default setpoint is 52 C The setpoint should be adjusted to ensure that the water is stored at 60 C and distributed at 50 C within 1 one minute at all outlets Care is needed to avoid much higher temperatures because of the risk of scalding At 50 C the risk of scalding is small for most people but the risk increases rapidly with ...

Page 84: ...tent engineer Menu Description See Section User Access Installer Access GENERAL Vacation Mode On Off 21 1 1 Yes Yes Time and Date 21 1 2 Yes Yes Software Version read only No Yes Temperature Units C F 21 1 4 Yes Yes DHW Night Setback Offset No Yes Display Timeout No Yes Display Contrast 21 1 9 Yes Yes TEMPERATURE SETTINGS 3 Way Valve Time No Yes DATA LOGGING Reset Last 10 Errors No Yes Service Mod...

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Lochinvar ECOKNIGHT EKW116CE, Installation Manual

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