FireBird Enviroair User manual

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Date:

Enviroair Air Source Heat Pump

End User Guide

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FOREWORD

We would like to thank you for purchasing a Firebird Enviroair Air Source Heat

Pump. This instruction manual is produced for the reference and guidance of

the end user. This guide is aimed at providing a basic understanding of the heat

pump system installed within your property. Please always refer to the latest

manual on our website: www.firebird.ie

ENVIROAIR AIR SOURCE HEAT PUMPS

How it works

Firebird Enviroair air source heat pumps work by using a refrigeration process to

transform low-grade energy from the outside air into high-grade energy. The

high-grade energy (heat) created by the heat pump is automatically transferred

to water which is then ready to be used in a heating system or for providing

domestic hot water. Even at temperatures as low as -20 C it can supply

significantly more energy than it uses.

Firebird Enviroair air source heat pumps provide an economical and

environmentally friendly alternative to traditional space heating and hot water

systems. For every kW used by the Firebird heat pump, up to 5kW heat output

can be used for space heating and domestic hot water.

Coefficient of Performance or CoP

The efficiency of the heat pump is also referred to as its CoP and is the result of

the power output divided by the power input. For an air source heat pump, CoP

is generally in the range of 2.5 to 5 but it varies all the time, as the outside air

temperature varies.

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FIREBIRD ENVIROAIR HEATING SYSTEMS

Running patterns and flow temperatures

A traditional boiler system is usually oversized for the property and is designed

to work at a high flow temperature (80°C). The boiler will generally run for

limited periods of time during the day.

In contrast, the heat pump will have been sized to match much more closely the

steady state heat load for the property and is therefore able to run all day

economically in cold weather. This is done to utilise the lower water flow

temperature that the heat pump produces. If it were required to produce higher

temperatures, then the efficiency would be compromised - efficiency goes

down as the water flow temperature goes up. Radiators supplied from a heat

pump will be warm rather than hot to the touch but, being larger than usual and

warm for a longer period. this will maintain the house at a comfortable

temperature.

Average house temperature

A Firebird heating system is designed to maintain the property at 21 C for living

areas, and 18 C for bedrooms. Whether the system comprises underfloor

heating or radiators it must be borne in mind that increasing the house

temperature will increase the running costs. It is recommended by the industry

standard that the target room temperature is set at no more than 21 C in living

rooms and 18 C in bedrooms.

For working guidance on room temperature please see chart on the next page.

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Weather compensation

The heat pump measures the outdoor temperature and adjusts the

temperature of water being fed to the heating system. The warmer it is outside

the lower the flow temperature and so the higher the efficiency of the heat

pump. This method of operation is called ‘weather compensation’ and is critical

to enabling the heat pump to operate efficiently by allowing it to always work at

the lowest possible flow temperature.

Domestic hot water (priority)

The domestic hot water temperature has been setup during commissioning to

between 42°C and 48 C. When the set temperature of the tank falls below 5°C,

the system will switch automatically to domestic hot water. Recharge times

depend on the volume of the cylinder and the output of the heat source. The

Domestic Hot Water “DHW” boost function via the PC-controller, can be used if

required, when demand for hot water is high.

Note: The boost function activates the electric immersion heater within the domestic hot water tank

and may have an effect on the running costs.

The cylinder immersion heater is normally only required during the periodic Legionella purge cycle.

*Legionella purge cycle - Function within the PC-Controller designed to raise the temperature of the cylinder

above 60°C for an hour once a week, to purge the cylinder of Legionella and other bacterial growth.

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PC-controller

The controller is used to control your heating system and has been set up during

commissioning. The temperature in the house can be adjusted by using the

room stats. provided.

*More information page 8 (Controller Symbols).

Running the system economically

Heat pump set-up

The heat pump should be setup by the commissioning engineer. Its settings

should not be changed without full working knowledge of the system and of the

parameters calculated during the design process. If there are any doubts about

the way a heat pump is set up, Firebird technical support can assist customers in

checking system parameters.

Room stats

Rooms with a thermostat: adjust the room thermostat to your preferred

temperature (avoid settings above 21 C as this will increase the running cost).

The general room temperature can be increased or decreased using the

temperature adjustment buttons on the thermostat.

*Please refer to the manufacturer’s instructions or builder’s handover pack.

Thermostatic radiator valves (TRVs)

It is good practice with radiators to use thermostatic radiator valves (TRVs) to

control the heat output from individual radiators. Often TRVs are used in every

room except one (usually the lounge or the hall) which contains the room

thermostat.

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Firebird System Efficiency

First year of use

During the first year after a house has been built, the energy required to heat

the house can be higher than normal due to the need to dry out the fabric of

the building.

•Leaving windows/doors open

When leaving windows and doors open, room temperatures will fall below

the desired set temperature point. This causes the heat pump to run on a

higher load to react to heat which is lost and will increase the running cost of

your heat pump.

•Obstructing/reducing air passages of the heat pump

Heat pump needs air flow to work effectively. By blocking the air passage,

you will prevent the heat pump from running effectively and can cause

serious damage. Furthermore, always ensure that nothing is left resting on

the heat pump.

For correct guidance on heat pump spacing please see chart below.

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Commissioning

Similar to all heating systems, the Enviroair heating system must be

commissioned by a competent, qualified engineer. This will ensure that:

•the heat pump is fine tuned to best suit your heating system so that it

operates efficiently.

•The warranty is activated.

Preventive maintenance of equipment

The Enviroair heating system must be serviced annually by a competent,

qualified Engineer and with reference to the manufacturer’s instructions.

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PC- CONTROLLER

The PC-Controller has to be configured during commissioning for your heating system. No settings

should be altered as this may have a direct impact on the operation of your system and invalidate

the warranty.

Definition of the switches

1. Liquid Crystal display

Screen where controller software is displayed.

2. Ok button

To select the variables to be edited and to confirm

the selected values.

3. Arrow keys

Helps the user to move through the menus and

views.

4. Run/Stop button

Works for all zones if none of the zones are selected

or only for one zone when that zone is selected.

5. Menu button

Shows the different configuration options of the

user controller.

6. Return button

To return to the previous screen.

7. Favourite button

Domestic hot water boost *to be configured by

commissioning engineer.

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Controller Icons

Icon

Name

Description

Mode

Heating mode is enabled

Circuit Status

Demand -OFF

Heating circuit is turned off (domestic hot water gets priority over

heating)

No demand

Heating circuit load is turned on

Low demand

Heating circuit is on low load 0 - 33%

Medium demand

Heating circuit is on medium load 33 - 66%

High demand

Heating circuit is on high Load 66 - 100%

Defrost mode

The heat pump is performing a defrost cycle

Compressor

Compressor within the heat pump is running

Aux. Boiler

Boiler enabled (hybrid systems only)

Circulating Pump

Displays which circulating pump is running

Alarm

The ON button will go red and the alarm code will

appear at No. 7 on the controller display.

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COMMON QUESTIONS AND ANSWERS

How do I raise/lower the temperature in the house?

To increase/lower the temperature in the house, simply raise/lower the

temperature on each room stat. We recommend raising/lowering the

temperature of the room stat. by increments of 1°C when fine tuning the

temperature. Once selected, the heat pump will maintain the desired

temperature thereafter.

My hot water is not hot enough

Your system has been set up with comfort and efficiency in mind. We first

recommend reading page 4 of this guide. If you have tried this and have found

the hot water demand is not enough, visit our website @ www.firebird.ie for

our “End-user Hot Water Tutorial”.

My House has dropped in temperature

1. Check if any windows/doors are open and close.

2. Ensure that your room stat. has not been turned down.

3. Verify that radiators are not covered by curtains, etc.

4. Check the controller to ensure that there is no red light.

If there is a red light on the controller, you should press the ON button for 3

seconds. Press the ON button again until the light goes green. If the controller

goes red again, call your Engineer.

How do I turn off my heating during the summer months?

Simply lower/turn off the room stat. As winter months approach, it is

recommended to increase the temperature by increments of 1°C until the

desired temperature is reached.

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