simple ‘U’ bracket. Check hose routing before finally choosing a position.
ROUTING HEATER AND A/C HOSES Your Universal Heat/AC package is supplied with all the unions required for most installations. Should you require additional straight or elbow unions for your particular component layout we will be happy to supply them. It is important that all the hoses should be routed between components along the line of the least stress so it’s a good idea to pre-fit all unions and dummy-run all hoses using plain garden hose. Avoid tight turns close to components that will put strain on the outlets. For obvious reasons, avoid running a heater hose directly alongside a refrigerant hose - space them apart and insulate long runs, Refer to the diagram for the general routes. Push all the hoses fully into the ferrules, trimming them to length as you go. When you have settled on the optimum layout and routing, measure each length of garden hose and, noting that there are three different hose sizes, order just as much refrigerant hose as you need. Replace the garden hose with the real stuff and wrap each hose end with masking tape and, using a magic marker, mark the tape and the union ferrule as in the picture below, for accurate alignment during crimping.
This picture also shows the mounted drier (as yet without the Trinary switch fitted) and one charging port. The in-line charging ports supplied with the kit should ideally be sited close to the compressor. Remove the hoses and fittings together and keeping your magic marker lines aligned, get your local refrigerant or hydraulic hose supplier to crimp the ferrules. It is important that these are crimped correctly using the right equipment. Check out your local Yellow Pages for a truck hydraulic specialist.
NOTE: Compressors other than the one we supply may require different unions.
MOUNTING THE CONDENSING RADIATOR We can supply a suitable condensing radiator that is usually mounted in front of the cooling radiator. The twin cooling fans are mounted behind the radiator, ‘pulling’ air through both. Space the two radiators approximately 20mm apart with rubber or hard foam pillars. TIP: Use heavy duty (10mm wide) ‘Tie- raps’ to secure the two radiators together. Pass a tie-rap through a hard rubber washer then through the condensing radiator fins, through the spacing pillar, through the water radiator and
a final rubber washer. Cut the head from a second tie- rap, slide it over the protruding end of the first and pull the whole sandwich tight. Repeat in each corner of the condensing radiator for a simple and secure fixing. It is important that the Tie-raps are tight enough to prevent movement that may damage the matrixes. IMPORTANT NOTE: When tightening the unions on the condenser and evaporator use two spanners so that the welded connections to the units are not stressed and damaged.
COMPRESSOR
It is possible that the engine you choose for your car will have been used in a vehicle fitted with air conditioning. This means that, even if your own donor had no A/C, the block is probably drilled to accept standard compressor mounting brackets and that standard pulleys and fan belts are available from the vehicle manufacturer. However, if you choose to install our compressor
you’ll need to fabricate brackets for mounting and belt adjustment. You could also require an additional crankshaft drive pulley groove. Our 'A' groove compressor has a twin groove pulley so you can juggle the alternator or power steering pump drives and keep just a single groove crank pulley. A 'POLY V' pulley compressor is also available.
Fan belts are measured around the outside circumference so, if you measure around the pulleys with a wide tape measure you should get an idea of the size you need. When the clutch of an A/C compressor switches in there is an immediate load on the engine. On smaller engines this extra load may cause the engine revs to drop- possibly stalling at tickover. To overcome this problem some engine management systems automatically increase the tickover speed by a couple of hundred revs whenever the compressor cuts in. Your engine circuit diagram (see
To order Tel: 01580 891309 or 07964 336183 or Fax: 01580 893733 or online at
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