Table of Contents
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Table of Contents
Related Manuals for Multistack Airstack ASPX Series
Summary of Contents for Multistack Airstack ASPX Series
- Page 1 ASP X Chiller Modules Operation and Maintenance Manual...
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Page 2: Table Of Contents
Table of Contents 1.0 Chiller Identification .......................3 2.0 Theory of Operation .......................3 3.0 Water Treatment ........................3 4.0 Flow Protection ........................4 5.0 System Water Volume ......................4 6.0 Electrical Data ..........................4 7.0 Identification and Explanation of Components ..............4 8.0 Factory Setup/Commissioning Information ..............7 9.0 Daily Log Sheet ........................7 10.0 Pressure Readings ........................7 11.0 Strainer Cleaning ........................8... -
Page 3: Chiller Identification
The use of hydrochloric, sulfuric, and muriatic acids as well as household bleach can cause stress corrosion to the stainless steel in the heat exchangers. Use of these or any other unapproved chemicals is not covered under the Multistack warranty. -
Page 4: Flow Protection
Switches are a Multistack option, otherwise they are to field supplied and installed. Chillers purchased with chilled or condenser water pump modules have a DP switch installed across the pump to verify it is running. Multistack recommends a paddle-type switch be installed in the leaving water piping of the chiller, or if using a differential pressure switch install it across the inlet and outlet water connections to the chilled and/or condenser water piping connections. - Page 5 7.2 Slave Module Control Panel All modules except the Master Module are referred to as Slave Modules. The only difference between these modules and the master is they do not have the master board or the master input terminals. 7.3 Compressors, Sensors and Switches Standard modules use two scroll compressors piped in tandem.
- Page 6 7.7 Nameplate Module nameplate(s) are located on the electrical control box door. Nameplates include phone and address for Multistack, model and serial number (important to supply when calling for service parts or technical support), refrigerant type and charge, and electrical data.
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Page 7: Factory Setup/Commissioning Information
By going to the System Variables Menu and selecting Factory Settings you can access the program type as well as other settings. To change these settings you must enter a password that is available to Authorized Service Technicians by calling Multistack tech support at (608) 366-2400. -
Page 8: Strainer Cleaning
11.0 Strainer Cleaning All ASPX modules have a 30-mesh filter strainer in the Chilled Water inlet header. The purpose for the filter strainer is to keep debris from entering the heat exchanger. An external “Y” or basket type system strainer should also be installed as a pre-filter to the factory supplied strainers. There is no set time for cleaning the filter strainers. -
Page 9: Pressure Relief Valve
Check glycol, inhibitor content in system chilled water. d. In severe cases where the chilled side water is contaminated the heat exchangers may need to be backflushed. Multistack has available a cleaning kit do to this task. Please contact Multistack for more information if heat exchanger cleaning is needed. Be sure to use only chemicals compatible with 316L stainless steel and copper. -
Page 10: Heat Exchangers
20.0 Heat Exchangers Multistack uses brazed plate stainless steel heat exchangers on the evaporator side of our modules. These heat exchangers are made of 316L stainless steel and 99.9% pure copper. Condenser side heat exchangers are made from direct expansion copper tube and aluminum fin. Without proper water treatment or due to abuse, the evaporator side heat exchangers can corrode and eventually develop an internal leak. -
Page 11: Optional Free-Cool Modules
23.0 Optional Free-Cool Modules Modules for free cooling can connect directly to mechanical or pump modules to utilize the outside air temperature for cooling the water temperature. Anytime a free-cool module is used a minimum of 25% glycol concentration should be used. The water / glycol in these modules use the fin tube coils for heat exchange. -
Page 12: Optional Water Storage Tank Modules
Basic Operational Sequence: • With the breakers within the control panel of the glycol feeder module off, apply the correct voltage (+/- 10%) to the module. • Fill the feeder tank with a 25% to 50% mixture of glycol and water. •... -
Page 13: Optional Variable Flow Chw Valves
In the factory setup menu of the master control you can select the number of valves to be open all of the time to maintain a minimum flow. For further information on variable flow please see the Multistack Variable Flow Supplement. -
Page 14: Troubleshooting Air Cooled Packaged Modules
28.0 Troubleshooting Air Cooled Packaged Modules ASPX modules use the Carel PCO3 master control. The user manual for the PCO3 controller is located in section 6 of the submittal package. The user manual details the different status screens and explanations of system or module faults. The following guide is for troubleshooting ASPX modules and the PC03. FAULT SOLUTION No Display on Master Module... - Page 15 Daily Chiller Log Sheet Date: Status Suct. Press Head Press Suct. Temp LoChw Temp Fault (if any) Comp #1 Comp #2 Comp #3 Comp #4 Comp #5 Comp #6 Comp #7 Comp #8 Comp #9 Comp #10 Comp # 11 Comp #12 Ent.
- Page 16 1064 Maple Avenue Sparta, WI • P 608-366-2400 • F 608-366-2450 www.multistack.com F162ASP O&M 072610...
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