Section 9: Commissioning Page 51
9.9 Weather Compensation
During commissioning, the four climatic curve parameters MUST be checked
and the default values adjusted to suit the design parameters for the system in
question. Refer to Section 8.2.2 for details.
Warm Weather Operation
If, during commissioning, the ambient air temperature is higher
than the air temperature setting (Te2) - parameter 2105 for the
climatic curve, the weather compensation function will NOT
allow the heat pump to operate to provide space heating.
To override this and force operation of the heat pump (e.g. to check operation
or commission the heat pump), parameter 2100 must be set to 0. The weather
compensation will be switched off and the heat pump will operate at a fixed
set point of 45°C irrespective of the outdoor air temperature.
If weather compensation is required, e.g. if the installation is to meet RHI
requirements, parameter 2100 MUST be reset to 1 once the heat pump has
been commissioned or the operation checked.
Alternatively, to operate the heat pump without touching the weather
compensation settings, set the system controls to provide a hot water
demand so that the heat pump operates to provide hot water heating. Reset
the hot water controls to the normal setting once the heat pump has been
commissioned or the operation checked.
9.10 Frost Protection Function Setting
Refer to Section 3.10.2 for details.
9.11 Pump Operation and Air Bleeding from Heating
System
The circulating pump can be operated to aid removal of the air from the
heating system.
To operate this function access the Terminal PCB.
• Check DIP SW4 is set to ‘OFF’.
• Press the Pump SW. Refer to Figure 9-4.
• Wait for a few seconds. The pump will start and each of the six outer
digital segments on the right-hand digit of the display on the terminal
PCB will light up sequentially during pump operation.
• The pump stops automatically after 10 minutes of operation. If all the air
could not be released from the water circuit, press Pump SW again (after
the pump has stopped) to operate the pump for another 10 minutes.
If you want to stop the pump before it stops automatically, press Pump SW
again.
Display
Pump SW.
Figure 9-4: Water loading and air bleeding in the hydraulic circuit
9.12 Pump Output Setting
The water pump is supplied factory set to maximum output (level 3), i.e. with
both DIP SW5 and DIP SW6 in the OFF position (down position). Refer to
Figure 8-9.
As this pump performance may be too high for many systems, the water
pump should be re-set to minimum (level 1) when commissioning the heat
pump.
To do this, set DIP SW6 to ON (up position). Refer to Figure 8-9.
During commissioning, check that the required flow rate is produced in the
heating system.
This will usually be indicated by achieving a temperature difference between
the heat pump flow and return of approximately 8°C when the heating
system is operating and up to temperature.
To determine the temperature difference, check the flow and return
temperatures using the ‘Monitor Display Function’ on either the remote
controller or Terminal PCB. Refer to Section 10.7 of these installation
Instructions for details of how to check the flow and return water
temperatures.
If necessary, the water pump output can be adjusted to achieve the required
temperature difference between flow and return when the heat pump is
operating.
The water pump can be set to the required output (e.g. level 1 or level 2) by
resetting the position of either DIP SW5 or DIP SW6, as follows:
• For pump output level 2: Set DIP SW5 to ON (up position)
• For pump output level 1: Set DIP SW6 to ON (up position)
9.13 Coastal Installations
Alternatively if the Aerona³ heat pump is installed the evaporator must be
sprayed with AFC50 and this repeated on each annual service. A blygold
option is available for applications close to the coast, Blygold PoluAl is
a metallic impregnated polyurethane coating specifically designed for
application to aluminium finned-copper tube coils. It is a thin, flexible, UV
and impact resistant coating that exhibits excellent adherence to aluminium
surfaces.
Dip switch positions:
Up: ON
Down: OFF
NOTE
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