WFC- SC(H) Chiller & Chiller-Heater 2 Installation WFC-SC(H)10, 20,30 & 50 Version 11-1
WFC- SC(H) Series .Installation -1- Contents Page 1. General Information 1.1 Precautions 1.2 Receiving 1.3 Unit data plate ...................................... ..................................... ...................................... 2 2 2 ..................................... ..................................... 3 3 .................................... .................................... .................................... .................................... 3 4 4 5 .....................
WFC- SC(H) Series .Installation -2- General Information. 1.1 Precautions The chiller-heater should be installed by trained and qualified personnel who are familiar with absorption machinery. All precautions in these instructions, on tags and on labels attached to the chiller-heater must be strictly observed to ensure safety of personnel and continuance of the warranty validation.
WFC- SC(H) Series .Installation -3- 2. Handling 2.1 Rigging Remove the crate and wooden base from the absorption chiller-heater. Lift the machine using a wire rope and eye-bolts (eye bolts provided with the chiller-heater as illustrated in figure 1). The dry weight and overall dimensions are detailed in section 1 Specifications of this manual. Care should be taken throughout to avoid damage to panels and piping connections – always lift in a vertical manner. Figure 1 2.
WFC- SC(H) Series .Installation -4- service, the Yazaki chiller-heater will not perform correctly on a continuous basis without proper maintenance. Furthermore, always avoid placing the cooling tower at a lower level than the chiller-heater. Such designs invariably lead to problems with maintaining pumping stability. 3.
WFC- SC(H) Series .Installation -5- platform or walkway should be built such that the chiller-heater, cooling tower and electrical apparatus can be safely and conveniently serviced. Level surface If the chiller-heater is to Mortar be placed outdoors at soil level, a proper Concrete Figure 4 concrete base, with dimensions indicated in Foundation rock figure 3 and constructed following the example of figure 4, is necessary.
WFC- SC(H) Series .Installation -6- < For SC50 > Fix the chiller with fixing plate and anchor bolt. The fixing plate and the anchor bolts are delivered as chiller accessory（Refer fig７） Lift the chiller with a hydraulic jack and level the chiller with the leveling bolt. Base plate to be under the leveling bolt.
WFC- SC(H) Series .Installation -7- 4. Piping 4.1 General After leveling the chiller-heater and cooling tower, the chilled-hot water piping, cooling water piping and heat medium piping can be installed. All pipes must be installed and connected to the machine ensuring that complete access for service is provided and that all panels, including the top panel, of the chiller-heater can be easily removed.
WFC- SC(H) Series .
WFC- SC(H) Series .Installation -9- 4.2 Chilled-Hot Water Piping Water supply and accommodation of expansion of the chilled water circuit is afforded by either an open cistern or closed expansion tank with check/pressure reducing valves as shown in figure 11.
WFC- SC(H) Series .Installation - 10 - A balance valve should be installed in the chilled-hot water outlet and a stop valve should be installed in the chilled-hot water inlet. Both valves along with thermometer wells should be placed in close proximity to the chiller-heater, refer figure 12. After thoroughly testing for leaks, insulate the piping circuit ensuring an adequate vapor barrier is obtained. Be sure the insulation allows proper access to all thermometer wells and hand valves.
WFC- SC(H) Series .Installation - 11 - A balance valve should be installed in the cooling water inlet and a stop valve installed in the cooling water outlet. Both valves should be placed in close proximity to the chiller-heater along with thermometer wells for temperature measurement.
WFC- SC(H) Series .Installation - 12 - 5. Electrical Wiring. 5.1. Electrical system diagram Figure 5-1-1 illustrates a typical electrical system diagram. Refer following section for wiring details.
WFC- SC(H) Series .Installation - 13 - 5-3. Junction box electrical wiring 5.3.1 Location of Junction box Junction box is located left bottom of the Chiller (refer to figure 5-3-1a.) Figure 5-3-1a (SC (H) 10, 20 and 30) Junction box Junction box is located rear bottom of the Chiller (refer to figure 5-3-1b.
WFC- SC(H) Series .Installation - 14 - 5.3.2. Inside of Junction box wiring In the Junction box there is a noise filter and some connecting terminals as figure 5-3-2. Note1. All conductors must be from copper material. Note2. All wiring must comply with local and national electrical code and regulation. Figure 5-3-2 Noise filter Error signal input terminal Connecting terminal Extra control signal output terminal ・Connect the conductor by adjusting the symbol (3,4,5,6,CM2) with figure 5-2-1 .
WFC- SC(H) Series .Installation - 15 - 5.4. Remote switching If remote operation is required, make the connection according to the following procedure. 5.4.1. Location of Control box (CB) The CB is located behind the front panel as figure 5-4-1 (The sample figure is WFCSC30) Control panel CB Take off the 2 screw to open the cover Figure 5-4-1 Take off the front panel 5.4.2. How to wire (remote switch) Connect the dry contact signal according to Figure 5-4-2.
WFC- SC(H) Series .Installation 5.4.3. Position of RUN-REMOTE-STOP Switch Adjust the "Run-Remote-Stop switch" to the position of the Remote.
WFC- SC(H) Series .Installation - 17 - 5.5. Condition output signal If absorption machine operation signal and absorption machine alarm signal is required, make the connection according to the following procedure. 5.5.1. How to wiring (condition output signal) Connect the output signal according to Figure 5-5-1.
WFC- SC(H) Series .Installation - 18 - 6 Water Quality 6.1 General Water used in the chilled-hot water circuit and cooling water circuit may cause corrosion if not properly analyzed and treated to maintain a passive condition. The cooling water circuit is particularly vulnerable since in most cases, this is an open circuit thus lending itself to scaling from precipitation of dissolved solids, and to growth of algae and micro-organisms in the water.
WFC- SC(H) Series .Installation - 19 - 7 Ambient temperature 7.1 Winter Shutdown If only heating mode of operation is required from the chiller-heater during the winter months, drain the cooling tower and associated water circuit including the absorber/condenser. This is particularly important if freezing conditions are likely to occur due to low ambient temperatures.
WFC- SC(H) Series .Installation - 20 - Installation Check and Request for Commissioning Yazaki Distributor: …………………………………………………………………. Project Name: ……………………………………Location ……………………….. Date Installation Completed: ………………… Model No. …………………………Serial No……………………………………… Check Items Absorption machine & cooling tower 1.Unit & cooling tower correctly mounted 2. Levelling bolts properly located 3. Mounting plates properly located 4. Level longitudinal and transverse correct 5.
