AN Series FAQ’s

  1. What are the minimum & maximum output water temperatures achievable?
    The Minimum output heating water temp is 95°F and the Maximum output heating water temp is 131°F. The Minimum output cooling water temp is standard 41° and with optional DCPX-ADV accessory the Minimum output cooling water temp is 21°F and the Maximum output cooling water temp is or 59°F.
  2. What are the minimum and maximum ambient temperatures for operation?
  3. Is there a low ambient option available and if so what does it entail?
    Yes there are 2 types of low ambient options. Option 1: DCPX allows capability of unit to operate to an outdoor ambient temperature of 14f. Option 2: DCPX-ADV allows capability of unit to operate to an outdoor ambient temperature of 14°F producing 21°F processed water/glycol.
  4. What safety devices electric are contained in the units? The safety devices contained within the units are as follows: high pressure switch, low pressure switch, hydronic safety valve, high temperature switch, differential pressure switch, compressor circuit breaker, and circuit breaker for auxiliary circuit and fans.
  5. What is the warranty period and coverage term for these units? The warranty period on all AN series heat pumps and Chillers is one (1) year all parts and five (5) years compressor warranty. Labor warranty is the responsibility of the installing contractor. This warranty is subject to approval from an Aermec trained technician at time of startup and commissioning.
  6. What controls are available with the units The controls available although not limited to the units are an intelligent indoor controller, and a simplified indoor controller.
  7. Are building management controls able to tie into the on-board controller inside the unit? If so what language does the controller “speak”? Yes, all network variables by controllers. BMS contractor.
  8. What type of refrigerant do these units operate with?
    The refrigerant contained within the units is R407C a non-ozone depleting refrigerant.
  9. What type of compressor does this system utilize? All of the AN units utilize a single high efficiency scroll compressor incorporating both internal protection along with a sump oil pre heating electric element.
  10. What is the nominal voltage for the units and what tolerance can they handle? All of the AN units operate at 230V, therefore at a 10% tolerance rate that results in a minimum of 207V and a maximum of 253V.
  11. What is the operating weight of the units as opposed to the shipping weight?
  12. How much capacity is lost due to glycol?
  13. How much refrigerant is required for installation? No refrigerant is required for installation as the units are already charged and ready for operation.
  14. What approvals have the units attained?
    The units are ETL certified for both Canada and the USA to meet ANSI/UL 1995 safety codes and standards.
  15. What hydronic components other than a pump and tank contained within the units?
    The units come standard with an expansion tank, safety water valve, air breather valve, backflow preventer, manual shut off valves, high pressure flexible joints, and an air bleeder valve.
  16. Where do I go for technical support?
    For technical support, please contact your distributive representative. For technical documentation, please visit www.aermec.us
  17. Generally what % savings will I achieve over traditional fossil fuel systems?
    Well there are too many factors and controllable variables that affect the savings equation. Please consult your distributive representative for an educated estimate on savings.
  18. What if I am interested in a larger unit although do not have 3 phase power?
    Option 1 is to use many AN0417A/HA (3 ton) piped in parallel offering great redundancy. Option 2 is the use of a phase convertor to allow the use of three-phase equipment in single-phase applications.
  19. Is there a minimum standby temperature for the compressor if the unit is not operation for a long period of time?
    No there is not a minimum standby temperature required. Although if the unit is disconnected from its main breaker then enough glycol must be used and upon system start up unit must be powered for 48 hours prior compressor operation.
  20. Can we add another system pump to the system if the internal pump in the units is not large enough for the application?
    Yes an additional pump added to the system is possible as long as it is placed on a separate loop than the AN unit/s. Ex. Primary Secondary or Injection.
  21. What is the minimum flow and pressure required for correct operation of the unit?
  22. How do the units know whether they should be in heating or cooling mode and at what values are they pre-configured for?
    The mode setting for the units are preconfigured and altered from the built in micro processing controller (Uchiller) which also has the capability of transmitting and changing parameters from a remote location with an optional indoor controller or BMS adapter.
  23. What winterization methods are required for these units?
    On a unit not required for operation during the winter i.e. standard chiller installing contractor must ensure sufficient amounts of glycol are evenly mixed throughout the hydronic system or the systems is drained.
  24. How is defrost managed and controlled?
    Defrost is controlled by the micro processing unit. Which adheres to these specific factory defaulted values: temperature based defrost start and end, minimum time to start defrost, minimum and maximum duration of defrost, delay between 2 defrost cycles, and defrost by external contact.
  25. What are the units’ sound ratings? And what standard are they tested to? Please refer to below listed table for sound pressure data; the standard tested to is EN-ISO 9614-2
  26. Is there a start up and commissioning procedure? Please refer to the below listed web link for start up and commissioning procedure http://aermec.us/docs/Chillers/startup_maintenance.pdf
  27. What is the maintenance procedure for both the heat pumps and chillers? Refer to page 7 of the Start-up Maintenance Manual for AN Chillers & Heat Pumps for additional information on maintenance.
  28. Are windscreens/barriers required for windy locations or low ambient operation? According to the installation manual page 35; indicates that a unit positioned in windy areas must have windbreak barriers for proper operation
  29. Is auto start after a power failure available? Yes auto start after a power failure is available as the micro processing unit saves values internally and is able to resume operation wherever it has left off (power outage).
  30. Is there an alarm management system? And if so does it allow external device to read it? Yes there is an alarm management system built into the micro processing unit that ensures harmless operation for the unit. It is also possible for an external alarm relay to be used to output the alarm signal generated.
  31. What is the minimum clearance required for installation?
  32. What type of compressor management feature are the units programmed for? The micro-processing unit that relays on 18 parameters and settings to ensure good compressor operation solely manages the compressor. Please refer to below table for detailed compressor management info
  33. What are the pressures drops through the evaporator?
  34. What size expansion tank is contained in the units?
  35. What type of glycol is suitable for the units Non-corrosive type glycols should be used in the system such as propylene glycol.
  36. Can I hook up a boiler as back up and how would it function? Yes a backup boiler is required for areas that encounter temperatures of less than 14°F . The boiler would be piped and configured in a manner that would boost supply water temperature to indoor emitters when outdoor temperature falls due to a capacity decrease or shut down of AN heat pump.
  37. How are 2 or more units supposed to function together? In the event that more than one unit is piped together offering redundancy or additional capacity. The units need to be present at different output water temperatures or externally controlled to operate at the same rate.


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