YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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SECTION 3 - HANDLING AND STORAGE LIFTING USING LUGS Units are provided with lifting holes in the base frame which accept the accessory lifting lug set as shown in the figure below. The lugs (RH and LH) should be inserted into the respective holes in the base frame and turned so that the spring loaded pin engages into the hole and the flanges on the lug lock behind the hole. The lugs should be attached to the cables/chains using shackles or safety hooks. LUG 22 LOCKING PIN CORRECT LOCKING PIN LIFTING HOLE IN BASE FRAME FLANGE LUG LIFTING USING SHACKLES FLANGE LOCKING PIN LIFTING HOLE IN BASE FRAME INCORRECT LUG FLANGE The shackles should be inserted into the respective holes in the base frame and secured from the inside. 36 mm 67 mm Use spreader bars to avoid lifting chains hitting the chiller. Various methods of spreader bar arrangements may be used, keeping in mind the intent is to keep the unit stable and to keep the chains from hitting the chiller and causing damage.. FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 Never lift the chiller using a forklift or by hooking to the top rails. Use only the lifting holes provided. Lifting Instructions are placed on a label on the chiller and on the shipping bag. JOHNSON CONTROLS
FORM 201.28-NM1.1 ISSUE DATE: 8/29/2012 LOCATION REQUIREMENTS For optimum performance and trouble-free service, it is essential that the installation site meet the location and space requirements for the model being installed. It is important to ensure that the minimum service access space is maintained for cleaning and maintenance purposes. OUTDOOR INSTALLATIONS The units are designed for outdoor installation and can be installed at ground level on a suitable flat level foundation easily capable of supporting the weight of the unit, or on a suitable rooftop location. In both cases an adequate supply of air is required. Avoid locations where the sound output and air discharge from the unit may be objectionable. The location should be selected for minimum sun exposure and away from boiler flues and other sources of airborne chemicals that could attack the condenser coils and steel parts of the unit. If located in an area accessible to unauthorized persons, steps must be taken to prevent access to the unit by means of a protective fence. This will help to prevent the possibility of vandalism, accidental damage, or possible harm caused by unauthorized removal of protective guards or opening panels to expose rotating or high voltage components. For ground level locations, the unit must be installed on a suitable flat and level concrete base that extends to fully support the two side channels of the unit base frame. A one-piece concrete slab, with footings extending below the frost line is recommended. To avoid noise and vibration transmission, the unit should not be secured to the building foundation. On rooftop locations, choose a place with adequate structural strength to safely support the entire operating weight of the unit and service personnel. The unit can be mounted on a concrete slab, similar to ground floor locations, or on steel channels of suitable strength. The channels should be spaced with the same centers as the unit side and front base rails. This will allow vibration isolators to be fitted if required. Isolators are recommended for rooftop locations. SECTION 4 - INSTALLATION LOCATION CLEARANCES Adequate clearances around the unit(s) are required for the unrestricted airflow for the air-cooled condenser coils and to prevent re-circulation of warm discharge air back onto the coils. If clearances given are not maintained, airflow restriction or re-circulation will cause a loss of unit performance, an increase in power consumption, and may cause the unit to malfunction. Consideration should also be given to the possibility of down drafts, caused by adjacent buildings, which may cause re-circulation or uneven unit airflow. For locations where significant cross winds are expected, such as exposed roof tops, an enclosure of solid or louver type is recommended to prevent wind turbulence interfering with the unit airflow. When units are installed in an enclosure, the enclosure height should not exceed the height of the unit on more than one side. If the enclosure is of louvered construction, the same requirement of static pressure loss applies as for ducts and attenuators stated above. Recommended Minimum Clearances Recommended clearances for the <strong>YVAA</strong> units are: • Side to wall – 6' (1.8 m) • Rear to wall – 6' (1.8 m) • Control panel end to wall – 4' (1.2 m) • Top – no obstructions whatsoever • Distance between adjacent units – 10' (3 m) JOHNSON CONTROLS 23 4
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YVAA Style A Air-Cooled Screw Liquid Chillers ... - Johnson Controls

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