Alpha Innotec Alira LWD Install Guide
|Planning The mechanical Installation|
The Alpha InnoTec Operating Manuals contain information on the heat pump and instructions for installation. The primary manual 83053500iUK contains all the mechanical installation information for the whole LWD range, the Supplement Manual 83062500dUK gives specific performance and electrical information for the LWD50ASX and LWD70ASX single phase models.
The LWD outdoor unit needs to be mounted where it can get a ready supply of fresh air to the back of the unit and the exhaust air can de dissipated without recycling. Consider how the pipes are to run between the unit and the house. The HMD unit is mounted inside the house and the shorter the run the better.
Because the unit contains a charge of propane it must not be positioned too close to a door or window or over a light well for a basement. The gas is heavier than air and can be a hazard because of its flammability. Observe all regulations concerning the use of flammable gas. The Operating Manual that is sent with the LWD has guidance on positioning on page 32.
Use the drilling pattern in the Operating Manual page 37 & 38 to mark and drill the holes for the wall fixings. The brackets supplied will set the unit at the correct distance from the wall. Omnie supply, as an option, a wall duct kit containing the flow and return pipes, a condensate drain pipe and insulated segments with cable holes. If the services are to pass through the wall behind the LWD the wall duct makes a very neat addition. It is supplied with a plastic cover that fits under the services hiding the pipes and cables from view, protecting them from damage. See the picture below.
For a floor mounting installation the feet need to be bolted to a concrete base. Decide where the condensate drain is to be run first; if draining to a soak-away form this below the concrete slab before casting it with a 2″ drain pipe directly under the drain on the heat pump. The position is provided on the slab drawing.
Decide also where the pipes and cables are to run, if directly behind the unit see page 39,
If running underground cast this into the slab using the dimensions on page 40.
The dimensions given on page 33 through 36 are not for air circulation. See page 41 for clearance for air circulation.
Observe the instructions in the PDF provided below.
For a special neat finish Omnie can supply a valance kit that fits between the LWD casing and the slab. This continues the lines of the heat pump down to the ground hiding all the connections. This should be listed on the quotation under Optional Items.
LWD Operating Manual Primary PDF
Supplement Operating Manual LWDASX PDF
Mounting Accessories Instructions
|Mounting the LWD Wind Effects|
The LWD outdoor unit must be positioned against a wall or some other suitable wind break. Without the wind break the wind will sometimes blow in the opposite direction to the air flow which has dire consequences. The correct distance from the wall is 200mm, no more no less. If installing on a roof or other area without a wall fit a fence panel or suchlike behind the unit.
|Fitting the LWD|
When unpacking take care when removing the packaging not to lose any components. Find the blue plastic wallet containing the paperwork, you will need this and it should be left behind for the end user and for ongoing maintenance. If the blue folder can’t be found call Omnie Customer Services and inform them, a pack will be sent to you.
Lifting the LWD
When the mounting brackets are securely fixed remove the wood screws holding the LWD to the pallet. You will see the two channel brackets attached to the underside of the LWD; these are the lifting handles. Lift one end of the LWD and screw in two mounting bobbins, these engage with the captive 8mm nuts on the base of the casing. Screw them hand tight.
fitting the connections
Fit the drain spigot under the unit and secure with the 3 screws supplied.
Remove the screws around the lid of the LWD and put it somewhere safe. Remover the screws on the bottom of the left hand end panel and the one on the front to the left of the plastic grill and lift the panel up until it comes free. Put this with the lid.
Locate the flexible hoses; one short one long. Fit the hoses to the heat exchanger using the fibre washers supplied in the box. The ends of the hoses should stick through the rectangular hole in the base of the compressor compartment. Fit the black foam closure block around the flexi pipes and slid it into the opening in the base pushing it fully home.
Take the three cables coiled up in the compartment and thread them through the holes in the closure block. If The coms cable will not reach the HMD unit inside the house, extend it with a suitable length of SY-0.75 4 core cable, joining it inside the compressor compartment using a metal box, more on that later.
Close up the end panel taking care to hook it on to the back panel and slot the front into the grill panel. Replace the screws and tighten. You will need access later on to vent the top of the heat exchanger after first filling the system.
|Connecting The Services|
By now you must know where you are taking the services into the buiding; through the wall or underground. If it is through the wall imediatly behind the LWD unit the Wall Duct makes the installation simple and neat.
Drill the hole through the wall before fitting the LWD outdoor unit following the instructions and dimensions on page 33.
For bottom entry services use pre-insulated pipe in a flexible duct along with a ducts for the cables. The LIN bus cable should be kept separat from the power cables so install two separate 25mm flexible trunking runs next to the pipe duct. The two power cables run through one duct and the coms cable through the other. Alternatively Omnie can supply a combined duct system; state the length of run between the LWD and the house entry point.
Make careful note of which is the flow and which is return because it makes a difference to the heat output. The hot flow is from the top of the heat exchanger (the black block with the 1″ connections) and the return connects to the horizontal stub on the bottom of the heat exchanger. Use the flexible hoses supplied along with the fibre washers provided in the ancillaries box. The flow line is connected to the HMD unit inside the building which houses the circulating pump and the electrical terminals for the LWD.
Flush the heating system through before finally connecting the flow and return to the LWD outdoor unit. Fit a temporary by-pass across the connections with one of the flexible hoses. It is vital not to allow any debris into the heat exchanger. Carry out the strength pressure test before connecting the LWD unit, the maximum working pressure is 3bar which must not be exceeded. The strength test should be carried out a 1.25 x the max working pressure.