Page 1: Table Of Contents
CH-MG150 OPERATING INSTRUCTIONS CH-MG200 GAS-FIRED DOUBLE-EFFECT ABSORPTION CHILLER-HEATER FOR YOUR SAFETY FOR YOUR SAFETY Do not store or use gasoline or If you smell gas: other flammable vapors and 1. Open windows (only if installed liquids in the vicinity of this or any indoors) other equipment.
Page 2: General
If the equipment does not operate as Double-Effect Absorption Chiller-Heater expected, check the Troubleshooting units. Guide in these instructions BEFORE Please read ALL instructions carefully calling your Yazaki Authorized Service and observe precautions. Failure to Provider . This approach will not (ASP)
Page 3 COOLING OPERATION High-Temperature Generator The liquid refrigerant that drips off the (HGE) tubing bundle joins the liquid refrigerant The gas burner heats a dilute lithium that resulted from the operation of the bromide solution High- LGE and accumulates in the condenser Temperature Generator resulting in a sump.
Page 4 This action dilutes the concentrated Absorber sump before being pumped solution back to the same concentration back into the Generators to start the level as it was when the cycle began. cycle anew. dilute solution gathers Fig. 1 – DOUBLE-EFFECT ABSORPTION CYCLE (COOLING) HEATING OPERATION High-Temperature Generator...
Page 5 HEATING OPERATION Absorber (ABS) Evaporator (EVA) Liquid refrigerant that condensed on the Superheated refrigerant vapor outer surface of the Evaporator tubing condenses on the outer surface of the bundle drips into the Absorber sump. Evaporator tubing bundle. Heat equal to Concentrated solution from the HGE and the latent heat of the refrigerant is dilute solution cycled through the LGE...
Page 6: Controls
These controls and their and is located on the front of the control functions can be explained by your box. The control box is located behind Yazaki Authorized Service Provider. the right-hand service door, as shown in Once COOLING HEATING Fig.
Page 7 GENERAL INFORMATION Evacuation Service Valves A and B are Control Panel located behind this located behind panel in this location. this panel in this location. Fig. 4 SOLUTION PUMP CONTROL The VFD Solution Pump is controlled Universal replacements by a Hitachi VFD Controller. This recommended.
Page 8: Control Adjustments
CONTROL ADJUSTMENTS The chiller-heater is normally operated qualified and trained personnel should from the control panel behind the right have access to the live electrical parts access door. If it is necessary to open inside the chiller-heater. Failure to the control box for troubleshooting, observe the safety warnings can observe all safety warnings on the chiller- result in personal injury, death, and/or...
Page 9 CONTROL ADJUSTMENTS ACT5 Maintenance Checker burner. Position this switch to the middle plugs into the Main CPU Board, shown in when the unit is to sit dormant and Fig. 8, and is used in many functions, unresponsive, but with power applied to including choosing the leaving chilled/hot water temperature set points.
Page 10 44.6°F and a heating set point of used. (7°C) 140.0°F A Yazaki Authorized (60°C) To adjust the chilled and hot water set Service Provider can adjust these set points: points using the ACT5 Maintenance 1.
Page 11 CONTROL ADJUSTMENTS To enable the Economy Mode, locate CPU Board logic will automatically apply terminals TB1-75 and TB1-76 a modifier to the temperature set point (See Fig. 9) on the I/O Board, located at the middle data in memory. When the circuit is left in the control box.
Page 12: Control Sequence
CONTROL SEQUENCE A built-in microprocessor in the chiller- controlled shut down under normal and heater controls external pump abnormal conditions. demand signals in response to the Running the chilled water pump at all cooling and heating load. The operating times is discouraged as the chiller-heater sequence of each pump and the cooling logic will expect to see the flow switch tower fan after start-up, during normal...
Page 13: Operation
OPERATION COOLING HEATING 1. Select “ON” DIRECT 1. Select “ON” DIRECT OPERATION section of the control OPERATION section of the control panel. panel. 2. Select “COOLING” on the MODE 2. Select “HEATING” on the MODE SELECT section of the control panel. SELECT section of the control panel.
Page 14: Winter Shutdown
Error could potentially damage the unit should Code does not clear or the chiller-heater it freeze in the winter conditions. does not restart, contact your Yazaki Authorized Service Provider (ASP) See the Service Manual for detailed information on proper Winter Shut Down.
Page 15: Routine Maintenance
EVACUATION OVERVIEW Arguably the most important aspect of *** Great care must be taken to maintenance for the chiller-heater is ensure that no oil enters the Yazaki maintaining a proper level of vacuum. chiller-heater! Permanent damage Evacuation is performed at the front of could result from even a small amount the machine.
Page 16  Always start with a fresh oil charge in section. Just because the vacuum pump has stopped producing bubbles in the the vacuum pump. water bucket does NOT mean the  Always use a liquid trap or collection vacuum level is adequate. A digital flask.
Page 17: Chemical Maintenance
CHEMICAL MAINTENANCE It is not necessary to perform regular charge is typically needed every three chemical maintenance on the Yazaki years in Yazaki gas-fired chiller-heaters. chiller-heater itself. chemical balance has been established in the factory during run testing. Normally, the only chemical that must be maintained is the inhibitor charge.
Page 18: Water Quality
WATER QUALITY It is the responsibility of the Owner or limits shown in Table 1. The water End User to have the cooling water quality in the chilled/hot water and the analyzed and chemically treated as often cooling water circuits should not exceed as is necessary so that it conforms to the the following limits: Note:...
Page 19: Error Codes
ERROR CODES Error Error Description Notes Code DCP power error Remote monitoring package has lost power. DCP communication line short Power available to the remote monitoring package but communication line is shorted. DCP communication line noise Remote monitoring package cannot communicate with the chiller-heater. Accessory error Optional fire safety shutdown has been enacted.
Page 20 Fax: 469-229-5448 Email: yazaki@yazakienergy.com Web: www.yazakienergy.com This symbol on the product’s nameplate means it is listed by UNDERWRITERS LABORATORIES, INC. Yazaki reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. MGUL-OI-1C2-0813...

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Yazaki AROACE CH-MG150 Operating Instructions Manual

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