Carrier aquazone 50RTG Installation, Start-up And Service Instructions Manual

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Carrier aquazone 50RTG Installation, Start-up And Service Instructions Manual Manual pdf 21 page image

21Table 21 — Aquazone D Control Current LED Status and Alarm Relay OperationsLEGEND NOTES:1. If there is no fault in memory, the Fault LED will flash code 1.2. Codes will be displayed with a 10-second Fault LED pause.3. Slow flash is 1 flash every 2 seconds.4. Fast flash is 2 flashes every 1 second.5. EXAMPLE: “Flashing Code 2” is represented by 2 fast flashesfollowed by a 10-second pause. This sequence will repeat contin-ually until the fault is cleared.Condensate Drain Pans — Check condensate drainpans for algae growth twice a year. If algae growth is apparent,consult a water treatment specialist for proper chemical treat-ment. The application of an algaecide every three months willtypically eliminate algae problems in most locations.Refrigerant System — Verify air and water flow ratesare at proper levels before servicing. To maintain sealed circuit-ry integrity, do not install service gauges unless unit operationappears abnormal. Check to see that unit is within the super-heat and subcooling ranges.Condensate Drain Cleaning — Clean the drain lineand unit drain pan at the start of each cooling season. Checkflow by pouring water into drain. Be sure trap is filled to main-tain an air seal.Air Coil Cleaning — Remove dirt and debris from evap-orator coil as required by condition of the coil. Clean coil witha stiff brush, vacuum cleaner, or compressed air. Use a fincomb of the correct tooth spacing when straightening mashedor bent coil fins.Condenser Cleaning — Water-cooled condensers mayrequire cleaning of scale (water deposits) due to improperlymaintained closed-loop water systems. Sludge build-up mayneed to be cleaned in an open water tower system due toinduced contaminants.Local water conditions may cause excessive fouling orpitting of tubes. Condenser tubes should therefore be cleaned atleast once a year, or more often if the water is contaminated.Proper water treatment can minimize tube fouling andpitting. If such conditions are anticipated, water treatmentanalysis is recommended. Refer to the Carrier System DesignManual, Part 5, for general water conditioning information.Clean condensers with an inhibited hydrochloric acid solu-tion. The acid can stain hands and clothing, damage concrete,and, without inhibitor, damage steel. Cover surroundings toguard against splashing. Vapors from vent pipe are not harmful,but take care to prevent liquid from being carried over by thegases.Warm solution acts faster, but cold solution is just as effec-tive if applied for a longer period.GRAVITY FLOW METHOD — Do not add solution fasterthan vent can exhaust the generated gases.When condenser is full, allow solution to remain overnight,then drain condenser and flush with clean water. Follow acidmanufacturer’s instructions. See Fig. 8.FORCED CIRCULATION METHOD — Fully open ventpipe when filling condenser. The vent may be closed whencondenser is full and pump is operating. See Fig. 9.Regulate flow to condenser with a supply line valve. Ifpump is a nonoverloading type, the valve may be fully closedwhile pump is running.For average scale deposit, allow solution to remain in con-denser overnight. For heavy scale deposit, allow 24 hours.Drain condenser and flush with clean water. Follow acid manu-facturer’s instructions.DESCRIPTION STATUS LED(Green) TEST LED(Yellow) FAULT LED (Red) ALARM RELAYNormal Mode On Off Flash Last Fault Code in Memory OpenNormal Mode with PM On Off Flashing Code 8 Cycle (closed 5 sec,open 25 sec, …)D Control is non-functional Off Off Off OpenTest Mode — On Flash Last Fault Code in Memory Cycling Appropriate CodeNight Setback Flashing Code 2 — Flash Last Fault Code in Memory —ESD Flashing Code 3 — Flash Last Fault Code in Memory —Invalid T-stat Inputs Flashing Code 4 — Flash Last Fault Code in Memory —No Fault in Memory On Off Flashing Code 1 OpenHP Fault Slow Flash Off Flashing Code 2 OpenLP Fault Slow Flash Off Flashing Code 3 OpenFP1 Fault Slow Flash Off Flashing Code 4 OpenFP2 Fault Slow Flash Off Flashing Code 5 OpenCO Fault Slow Flash Off Flashing Code 6 OpenOver/Under Voltage Slow Flash Off Flashing Code 7 Open (closed after 15 minutes)HP Lockout Fast Flash Off Flashing Code 2 ClosedLP Lockout Fast Flash Off Flashing Code 3 ClosedFP1 Lockout Fast Flash Off Flashing Code 4 ClosedFP2 Lockout Fast Flash Off Flashing Code 5 ClosedCO Lockout Fast Flash Off Flashing Code 6 ClosedCO — Condensate OverflowESD — Emergency ShutdownFP — Freeze ProtectionHP — High PressureLP — Low PressurePM — Performance MonitorTo avoid fouled machinery and extensive unit clean-up,DO NOT operate units without filters in place. DO NOTuse equipment as a temporary heat source duringconstruction.Follow all safety codes. Wear safety glasses and rubbergloves when using inhibited hydrochloric acid solution.Observe and follow acid manufacturer’s instructions.