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ESP Varimax 20 ASHP, Installation And Operation Manual, Page: 37 / 41

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ESP Varimax 20 ASHP Installation And Operation Manual Download Page 37

37 of 41 

            V 1.0 

www.esavep.com

                                                                                 

PASRW060-D-BP 

 

 

 

 

16.0 Weather Compensation 

 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

The Varimax 20 has built-in weather compensation to ensure that that maximum 
efficiency is maintained and that output is matched to the load of the building and 
the external ambient temperature.  With factory defaults set (it is unwise and, 
possibly, dangerous to change these – see warning in section 10.9) the compensation 
is as follows: 

 

Summary of Contents for Varimax 20 ASHP

Page 1: ...1 of 41 V 1 0 www esavep com PASRW060 D BP ESP VARIMAX 20 ASHP Installation and Operation Manual...

Page 2: ...rthermore the installation must be carried out by an engineer who has successfully completed a recognised course in the installation of un vented heating systems such as CITB Failure to fit the unit c...

Page 3: ...3 Emitter systems 5 0 Installation 5 1 Where to use and Where to Site the unit 5 2 Location of the Unit 5 3 Transporting the Unit 5 4 Plumbing Considerations 6 0 Hydraulic Connection 6 1 Expansion ves...

Page 4: ...ature 10 5 Using the Premium User Interface 10 6 Setting the Time 10 7 Setting the Timers 10 8 Cancelling the Timers 10 9 Checking the Status of the ASHP 10 10 Locking the Display 10 11 Fault Displays...

Page 5: ...nd environmentally friendly unit that should be used primarily for space heating It can work with any kind of heat emitter scheme such as under floor heating the ESP Thermovec fan coil unit or traditi...

Page 6: ...d and or repaired by a suitably qualified and experienced engineer If you are in doubt about who is qualified to carry out such works on the Varimax 20 unit please call ESP The Unit MUST be properly e...

Page 7: ...cian call ESP Technical Support Switch off the power before carrying out any cleaning and or maintenance of the unit 3 0 VARIMAX 20 SPECIFICATIONS 3 1 APPEARANCE The Varimax 20 is designed to be styli...

Page 8: ...ter will help ensure that the heat load of the dwelling is kept to a minimum For existing buildings insulation should be improved as much as possible to minimise the heat load 4 2 Varimax Output Stati...

Page 9: ...n guidance is available from the MCS website 5 0 Installation 5 1 Where to use and Where to Site the unit The Varimax 20 can be used for domestic or commercial premises and consideration should be giv...

Page 10: ...e to secure the unit properly using the rubber feet will mean that it will fail MCS Certification and cannot be registered on the MCS database To allow precipitation to run off the unit and to ensure...

Page 11: ...tank be installed between the unit and the heating distribution system Please consult your installer or ESP when considering this system design point the right sized buffer tank can make a significan...

Page 12: ...mp These flexible hoses are available from ESP as part of an optional ASHP Installation Pack or individually 6 4 Automatic bleed valves Make sure that you fit automatic bleed valves air vent s at high...

Page 13: ...allow the system flow rate to be optimised for the individual project 6 8 TRVs Where Thermostatic Radiator Valves TRVs are fitted to radiators in the system one should NOT be fitted to any radiator in...

Page 14: ...ection 7 1 Warning Notes IMPORTANT All electrical work MUST be carried out by a suitably qualified electrician It is not an exaggeration to say that if you install connect your unit to a power supply...

Page 15: ...upply through a two port rotary isolation switch that has at least a 3mm contact separation at all poles fixed in close proximity to the unit and suitably positioned for general and emergency use as r...

Page 16: ...lso use these diagrams to check the installation through before starting the unit for the first time If the Building Regulations in your area require a 7 day programmer please note that the most effic...

Page 17: ...ating Capacity Range Kw 6 0 15 0 BTU h 20500 51000 Heating Power Input Kw 1 6 7 0 Max Running Power Consumption A 12 0 12 2 Power Supply V Ph Hz 230 1 50 Number of Compressors 1 Compressor Type Scroll...

Page 18: ...ing waterproof lagging with at least 30mm wall thickness Check the electrical wiring is correct in every respect In particular make sure that the system is properly earthed Inspect the heat pump to en...

Page 19: ...balance the heating being received in all areas of the system Check that the outlet water temperature is stable and increasing smoothly towards the target temperature The return water temperature shou...

Page 20: ...r Icon Key Function On Off This is a multi function button used to start the units turn it off cancel a current operation and to return to the previous menu page Time Used to set the time and the opti...

Page 21: ...that a value displayed in the auxiliary area is a power value Hour Indicates that the basic display area is displaying an hour value Minute Indicates that the basic display area is displaying a minute...

Page 22: ...ng the on off button When the unit is in stand by mode press the on off key and hold it for 0 5 seconds to start the unit When the unit is running pressing and holding the same button for the same tim...

Page 23: ...e down arrow will decrease the target temperature Press the key to save the setting or the to cancel the change If no key is pressed within 20 seconds the new setting will automatically be saved N B Y...

Page 24: ...om a Centigrade to a Fahrenheit display mute the interface and check the status of the ASHP Pressing the set button to change to the Premium User Interface If the on off button is pressed or no button...

Page 25: ...press the time button The display will change and using the up and down buttons will change the hours setting Press the set key to save the change Use the up and down buttons to change the minutes se...

Page 26: ...the timers Should you wish to set the timers against this advice the procedure is as follows Press and hold the time button for 2 seconds The display will change and the on time of timer 1 can be set...

Page 27: ...s will display the current Timer 1 on setting and the time will flash Press the set button and the Pressing the set button will stop the time flashing Pressing the on off button at this stage will can...

Page 28: ...he val symbol the parameter number and param symbols will be displayed Press the up and down arrows to toggle through the parameter list and the on off button to return to the Premium User Interface T...

Page 29: ...if the unit restarts after a power failure or if a fault is reported 10 11 Fault Displays Should the ASHP develop a fault a fault code will be displayed in the following format The fault code will be...

Page 30: ...t has failed replace it and recharge refrigerant if any has been lost Check over the power supply and the electrical system generally to make sure that no wires are lose or degrading You must investig...

Page 31: ...Check and change the temp Sensor P08 Disc temp prb Error Short circuit Open circuit Check and change the temp Sensor PP1 Disc press prb Error Short circuit Open circuit Check and change the sensor PP...

Page 32: ...Inv Input Overvolt Over Temp of the parts Lower the temperature and check E31 Input Over Cur Warn Over Temp of the parts Lower the temperature and check E32 IPM Sampling Cur Fault of current sampling...

Page 33: ...he system 1 Insufficient refrigerant 2 Blocked filter or capillary 3 Low water flow 1 Check for refrigerant leaks and recharge 2 Replace filter or capillary 3 Clean the water filter and bleed the syst...

Page 34: ...34 of 41 V 1 0 www esavep com PASRW060 D BP 13 0 Wiring Diagram For zero volt connection from Controller...

Page 35: ...ase with the exception of normalwear and tear including any damage damage caused as a result of lime scale deposits The stainless steel vessel forming part of the cylinder is warranted guaranteed for...

Page 36: ...This guarantee does not affect your statutory rights 15 0 Environmental Information This product is made from many recyclable materials therefore at the end of its useful life it should be disposed o...

Page 37: ...ather compensation to ensure that that maximum efficiency is maintained and that output is matched to the load of the building and the external ambient temperature With factory defaults set it is unwi...

Page 38: ...38 of 41 V 1 0 www esavep com PASRW060 D BP 17 0 Performance Frequency HZ Frequency HZ Frequency HZ...

Page 39: ...39 of 41 V 1 0 www esavep com PASRW060 D BP Frequency HZ Frequency HZ Frequency HZ...

Page 40: ...ssor frequency 90 Hz D01 Defrost start trigger pressure 5 0 bar D02 Defrost end trigger pressure 27 bar D03 Defrost cycle 45 mins D04 Defrost maximum 8 mins D05 4 way valve switching delay 55 Secs D06...

Page 41: ...after water pump start 1 mins P05 Target temp differential Heating 1 C P06 Target temp differential Cooling 1 C R01 Target set temp Cooling 12 C R02 Target set temp Heating 40 C R03 Trigger differenti...

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