Kensa Heat Pumps Q80 Series Installation And Commissioning Manual

Kensa Heat Pumps Q80 Series Installation And Commissioning Manual

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Q80 Series Heat Pumps
Installation and Commissioning Manual
Copyright ©2022 Kensa Heat Pumps Ltd
Q80 Series Range Heat Pump Manual Version 1
Page 1 of 40

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Summary of Contents for Kensa Heat Pumps Q80 Series

  • Page 1 Q80 Series Heat Pumps Installation and Commissioning Manual Copyright ©2022 Kensa Heat Pumps Ltd Q80 Series Range Heat Pump Manual Version 1 Page 1 of 40...
  • Page 2: Table Of Contents

    4.1......The golden rules of installing a heat pump ............4.2 ......Q80 Series heating schematics ................10 4.3......Q80 Series heating and cooling schematics ............. 14 4.3.1…………………….. Active or Passive Cooling……………………………………………………………………………………… 14 4.4......Secondary boiler back up systems (bivalent alternative systems) Fig 7……………….. 16 4.5………………………..
  • Page 3 8.1.4......General exceptions ....................34 8.1.5......Care of Duty ......................35 8.1.6......In the event of Damage ..................35 8.1.7......Replacement Parts....................35 9....... Heat pump and system settings sheet .......... 36 Q80 Series Range Heat Pump Manual Version 1 Page 3 of 40...
  • Page 4: Introduction

    1. Introduction—a message from the CEO Kensa Heat Pumps has been manufacturing ground source heat pumps since 1999. In the early days, it was difficult to find contractors willing to consider the technology. As a consequence, Kensa made considerable efforts to simplify the installation process to allow any competent contractor to perform the work.
  • Page 5: Safety Information

    For more information about where you can drop off your waste equipment for recycling, please contact your local city Q80 Series Range Heat Pump Manual Version 1 Page 5 of 40...
  • Page 6: General Product Information

    This manual explains how to install a Kensa ground source Q80 Series heat pump. The Kensa Q80 Series Heat Pump is designed to provide a low cost renewable heat source for a buildings heating system. Heat pumps can provide lower running costs and will generate significantly lower carbon emissions compared with traditional fossil fuels.
  • Page 7 Plate Heat Exchangers Compressors Fig 2. The internals of a heat pump (side view) Controller Wiring Enclosure Fig 3. The internals of a heat pump. (door open) Q80 Series Range Heat Pump Manual Version 1 Page 7 of 40...
  • Page 8 Controller main PCB Terminals Ground pump volt free relay MCBs Smart Starts Fig 4. Contoller Wiring Enclosure (cover removed) Q80 Series Range Heat Pump Manual Version 1 Page 8 of 40...
  • Page 9: Kensa Q80 Series Range Technical Data

    Q80 Series Range Heat Pump Manual Version 1 Page 9 of 40...
  • Page 10: Installation

    80kW heat pumps the buffer vessel should be approx 80 (compressor size) x 10 = 800 litres. Kensa heat pumps can work equally as well with horizontal, vertical or lake arrays as the energy source. Although for large Q80 Series projects it can be more usual to use a borehole field design due to space considerations.
  • Page 11 Q80 Series Range Heat Pump Manual Version 1 Page 11 of 40...
  • Page 12 Q80 Series Range Heat Pump Manual Version 1 Page 12 of 40...
  • Page 13 This page is intentional left blank. Q80 Series Range Heat Pump Manual Version 1 Page 13 of 40...
  • Page 14: Q80 Series Heating And Cooling Schematics

    The steady temperature of a ground array gives a ground source heat pump even more potential for cooling. Kensa’s Q80 Series range of heat pumps can provide cooling externally. This has the advantage of a lower cost system, higher efficiency and can be installed at a later date by the M&E contractor Kensa’s...
  • Page 15 Q80 Series Range Heat Pump Manual Version 1 Page 15 of 40...
  • Page 16: Secondary Boiler Back Up Systems (Bivalent Alternative Systems) Fig 7

    For all systems it is recommended that the BMS/Instrumentation Engineer contact Kensa if unsure on any aspects of the control of the system, i.e. Regarding:- • Time delays • Expected temperatures • Compressor run-times • Compressor starts per hour. • Q80 Series Range Heat Pump Manual Version 1 Page 16 of 40...
  • Page 17 Q80 Series Range Heat Pump Manual Version 1 Page 17 of 40...
  • Page 18 Q80 Series Range Heat Pump Manual Version 1 Page 18 of 40...
  • Page 19: Mechanical Installation

    If access to the whole of the unit is via withdrawing unit clearance between the units can be 30-50mm Fig 10 Heat Pump clearances Q80 Series Range Heat Pump Manual Version 1 Page 19 of 40...
  • Page 20: Installation Of The Heat Pump

    The area where the heat pump is installed must be dry and rodent free. viii. Phone Kensa to arrange for the commissioning of the unit. Do not switch the unit on without talking to Kensa first. Q80 Series Range Heat Pump Manual Version 1 Page 20 of 40...
  • Page 21: Electrical Installation

    Any electrical connections must be in accordance with current IEE regulations and carried out by a suitably qualified person. Any cable used must be adequately sized for the load. The Kensa Q80 Series heat pump range is available in three phase power supply versions only (415V 60 Hz).
  • Page 22: Three Phase Power Supplies

    The following sections detail the standard controller wiring connections. The heat pump should be set up in conjunction with the BMS on commissioning. Fig 15 Location of main PCB terminals Q80 Series Range Heat Pump Manual Version 1 Page 22 of 40...
  • Page 23: Main Pcb Terminal Description

    / specified for cooling applications. Simultaneous calls for heating and cooling will result in the unit returning an error code. Cooling applications can also affect eligibility for grant schemes. Q80 Series Range Heat Pump Manual Version 1 Page 23 of 40...
  • Page 24 100 (or whatever the single pulse is meant to represent). Terminal Block 5—Weather Compensation T9 All Kensa Heat Pumps are supplied with Weather Compensation as standard. This facility will reduce the return water set-point against a schedule of external ambient temperatures. In more simple terms, the temperature of water flowing into the building’s radiators or underfloor heating is reduced in mild weath-...
  • Page 25 Q80 Series Range Heat Pump Manual Version 1 Page 25 of 40...
  • Page 26 • The differential between two pressure sensors, one before the ground circulation pump and one after. Ground Pump Control (Signal only) Fig 18 Ground Pump Control relay Q80 Series Range Heat Pump Manual Version 1 Page 26 of 40...
  • Page 27 This page is intentional left blank. Q80 Series Range Heat Pump Manual Version 1 Page 27 of 40...
  • Page 28: Setting To Work

    Failure to do this could result in damage to the units. When purging good engineering procedures should be followed and all high points should have air bleed points installed. Q80 Series Range Heat Pump Manual Version 1 Page 28 of 40...
  • Page 29 Q80 Series Range Heat Pump Manual Version 1 Page 29 of 40...
  • Page 30: Purging The Headers

    This pressure drop allows the pipe to compress again. If the pipe is tight, a pressure increase is measured. This test should only be carried out on the ground arrays with the heat pump isolated from the test. Q80 Series Range Heat Pump Manual Version 1 Page 30 of 40...
  • Page 31: Testing Of Antifreeze Concentration

    The concentration of antifreeze is required for the commissioning certificate and it is advised that this figure is noted in the settings table. The drain cocks on the heat exchangers can be used to obtain a sample of thermal transfer fluid. Q80 Series Range Heat Pump Manual Version 1 Page 31 of 40...
  • Page 32: Controller

    For the Q80 Series Q heat pump the controller and heat pump settings are accessed via the display on the Q80 Series Heat Pump .
  • Page 33: Fault Finding

    It is recommended the Genesis Installation Manual is consulted if there are any problems with the control- ler/display. Q80 Series Range Heat Pump Manual Version 1 Page 33 of 40...
  • Page 34: Warranty

    8 Warranty The Kensa Q80 Series Ground Source heat pump is designed and built to the highest standard and as such is warranted for 5 years for parts from the date of commissioning or 5 ½ years from the date of manufacture (excluding the electrical components), whichever is shorter.
  • Page 35: Care Of Duty

    8.1.7 Replacement Parts Kensa Heat Pumps Ltd’s warranty obligations with respect to replacement parts are identical to those with respect to original parts; provided, however, in no event shall the warranty term for such replacement parts extend beyond the term established by the commencement date (i.e.
  • Page 36: Heat Pump And System Settings Sheet

    Filters fitted to system with isolation valves Manual Air vents fitted at highest points Monovalent or Bivalent Bivalent Heat Source Heat Source Function Bivalent Point Control Bivalent set point Q80 Series Range Heat Pump Manual Version 1 Page 36 of 40...
  • Page 37 Details of ground array Quantity Borehole Depth / Horizontal coil length Trench Depth & Width Trench Centres / Distance between Boreholes Pipe size Total length of Closed loop pipe Q80 Series Range Heat Pump Manual Version 1 Page 37 of 40...
  • Page 38 Ground Return Temperature °C Ground Flow Temperature °C Discharge Pipe Temperature °C Weather comp enabled T9 Weather Compensation Set Point °C Weather Compensation Multiplier Weather Compensation Maximum Variation Q80 Series Range Heat Pump Manual Version 1 Page 38 of 40...
  • Page 39 Load Side Operational Speed % Ground Side Operational Speed % Load Side Set Back Speed % Ground Side Set Back Speed % Exercise Mode Load Side ∆T °C Ground Side ∆T °C Q80 Series Range Heat Pump Manual Version 1 Page 39 of 40...
  • Page 40 Cylinder Immersion Set Point °C Cylinder Immersion Control DHW End Reading T2 at pressure stop T1 at pressure stop P5 Pressure Switch Point of use temperature Comments: Installed by:- Date:- Tel:- Q80 Series Range Heat Pump Manual Version 1 Page 40 of 40...

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