Mini-Space Series Installation, Operation & Maintenance Manual

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Mini-Space Series Installation, Operation & Maintenance Manual2.7.4 Condensate Drain Line2.7.4.1 Gravity DrainA drain line is installed to drain the condensate pan. Ifan optional humidifi er is used, the drain line from thehumidifier is typically connected to the condensatedrain line. The end of the drain line is clamped insidethe cabinet. The installer must install a customersupplied drain to the end of the drain line to removewater from the cabinet. See the installation drawingprovided with your unit for the size and location of thecondensate drain line.NOTEDuring normal operation the humidifier drains(hot) water into the condensate drain line duringnormal operation. As an option, a separatedrain line may be provided for the humidifier.The drain line must be located so it will not be exposedto freezing temperatures. The diameter of thedrain line should be the full size of the connection.NOTEPour some water into the condensate drainpan(s) prior to start-up. This fi lls the trap andprevents air from being drawn up the drainlines.2.7.4.2 Condensate PumpAn optional condensate pump is available for automaticremoval of condensate from the air conditionerand flush water from the humidifier. The pump istypically factory installed inside the cabinet for CCU-171& 201 systems. Otherwise, the condensate pumpmust be field installed.If a field installed pump is selected, a P-trap mustbe installed for proper condensate drainage (seeFigure 8). The height of the trap must be a minimumof 2 inches on standard systems to ensure properwater drainage. The condensate pump dischargeline should be 1/2 inch OD (maximum) copper pipeto prevent excessive back flow to the condensatepump.OUTLET 1/2" OD2.7.5 HumidifierINLET 7/8" ODSEE NOTE 2NOTES:1. MIMIMUM HEIGHT IN INCHES.2. P-TRAP MUST BE LOCATED IN THE INLET SIDE OF PUMP WHEN FIELD INSTALLED.Figure 8- Condensate PumpMini-Space precision A/C systems use an electrodesteam humidifi er. In most cases the humidifi er emptiesinto the condensate drain line during the fl ush/drain cycle. As an option, the drain for the humidifi ermay have a separate connection. Refer to the installationdrawing provided with your unit for the size andlocation of the connection.A water supply line for the humidifi er must be connectedto the end of the copper tubing provided bythe factory. Refer to the installation drawing providedwith your unit for the size and location of the connection.The humidifi er requires normal tap water for thewater supply. If the supply water is high in particulate,an external fi lter may be needed.CAUTIONDo not use demineralized water.2.00SEE NOTE 1Refer to the humidifi er operator’s manual suppliedwith the equipment, for complete manufacturer’sinformation on the humidifi er and the supply waterrecommendations.2-9(©April, 2008)Air Technology Systems, Inc.
Mini-Space Series Installation, Operation & Maintenance Manual2.8 Utility Connections2.8.1 Main PowerThe Mini-Space product offering is available in singleor three phase variations and a wide range of voltages.It is imperative that the unit nameplate beexamined to determine the operating voltage, frequencyand phase of the system (see Figure 9). Thenameplate also provides the full load amps (FLA), thecurrent the unit will draw under full design load, theminimum circuit ampacity (MCA) for wire sizing, andthe maximum fuse or HACR (Heating, Air Conditioning,Refrigeration) breaker size (MAX FUSE/CKTBKR) for circuit protection. The unit’s nameplate islocated inside the cabinet within the electrical box.NOTEIf the nameplate states MAX FUSE/CKT BKR, itis required to use fuses or a HACR type circuitbreaker to protect the system. Other protectiondevices are not allowed based upon the productlisting.The unit is provided with terminals for all requiredfi e ld-wiring connections. Refer to the electrical drawingsupplied with the unit for all power and control fi eldwiring.It is important to identify the options that werepurchased with the unit in order to confi rm which fieldconnections are required.WARNINGVerify power is turned off before making connectionsto the equipment.NOTEAll wiring must conform to local and nationalelectrical code requirements. Use of copper conductorsonly is required. Wiring terminations maybecome loose during transit of the equipmenttherefore; it is required to verify that all wiringterminations are secure.It is important to verify that the main power supply coincideswith the voltage, phase and frequency informationspecified on the system nameplate. The supplyvoltage measured at the unit must be within ±10% ofthe voltage specified on the system nameplate exceptfor 208/230V single-phase units which have a differenttolerance listed in the sections to follow.A main distribution panel must be provided with amanual fused disconnect switch or HACR type circuitbreaker per local and national electrical codes forservice to the equipment. Do not mount a customersupplied manual fused disconnect switch or HACRtype circuit breaker to the surface of the A/C unit.The unit is provided with a main power pilot hole anda control wiring pilot hole for connection of the fi eldwiringconduits. Typically, these pilot holes are locatedon the side of the Mini-Space cabinet. A label stating“MAIN POWER INPUT” is placed in close proximity.Figure 8- Sample NameplateTerminate the main power wires at the line side of themain power service disconnect switch located withinthe electric box (see Figure 10). A separate equipmentground lug is provided in the electrical box for terminationof the earth ground wire.(©April, 2008)2-10Air Technology Systems, Inc.
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