To Next PageTo Next PageWhat to do if the Premisys MP Fan energy wheel does NOT turn?
If the Premisys Fan energy wheel does not turn, first ensure the wheel drive is properly plugged in and that power is available. Another potential cause is overly tight air seals, which should be adjusted according to the instructions in the 'Adjust the Air Seals in the Optional Energy Wheel Start-Up' section. Finally, check for a broken belt, and replace it if necessary.
Why does the Premisys MP Fan energy wheel run intermittently?
If the Premisys Fan energy wheel runs intermittently, the wheel motor overloads might be tripping because of rubbing between the wheel and air seals. Recheck the air seals to ensure they aren't too tight, referring to the 'Adjust the Air Seals in the Optional Energy Wheel Start-Up' section for guidance.
Monthly inspection of units in storage, checking for moisture or dirt and performing maintenance.
Inspect unit assembly before final installation and check fasteners and rotating parts.
Units have packaged DX or split DX cooling options available.
Offers indirect gas-fired furnace, electric heat, or hot water coil as heat sources.
Unit is capable of Constant Air Volume (CAV), Variable Air Volume (VAV), 100% Outdoor Air.
Models are listed per ANSI/UL 1995, Heating and Cooling Equipment and are ETL Certified.
Details specific models, cooling capacities for Packaged DX and Split DX systems.
Lists additional manuals for heat modules, controller, and M-Net connection.
Unit features one or two plenum-type fans for supply air and optional exhaust air.
Includes evaporator, condenser, optional hot water, and optional reheat coils.
Includes evaporator, optional hot water, and optional reheat coils.
Units have one or two compressors; optional digital scroll or inverter scroll types.
Features a motorized intake air damper.
Optional SCR controlled electric heater with separate power supply.
Includes metal mesh, pleated paper MERV 8/13, and optional final filters.
Optional PVG or PVF furnace available on specific housing sizes.
Unit may include one or two compressors, condenser, and evaporator coils.
Unit may be ordered with split DX cooling and energy wheel for Mitsubishi outdoor units.
Provides weights, dimensions (L, W, H, J), and filter sizes for Packaged DX models.
Details dimensions for various inlet and discharge connection points on Packaged DX units.
Specifies required clearances for access (ACS), control center (CC), and outdoor air (OA).
Provides weights, dimensions (L, W, H), and filter sizes for Split DX models.
Details dimensions for various inlet and discharge connection points on Split DX units.
Specifies required clearances for access (ACS), control center (CC), and outdoor air (OA).
Instructions for safe lifting, including using spreader bars and checking balance.
Determines placement for high and low voltage wiring entry into the cabinet.
Guidance on installing factory-supplied or field-provided roof curbs for unit placement.
Notes on downblast discharge ductwork connections and openings.
Instructions for installing units on provided rails, ensuring proper support and positioning.
Sizing main power lines based on unit nameplate voltage and MCA.
Sizing wiring for optional electric heaters, ensuring compatibility with nameplate ratings.
Provides guidance on connecting power supplies, optional outlets, and field-wired components.
Recommends entry locations for electrical service, gas supply, and heater wiring.
Details requirements for field-supplied gas supply piping for indirect gas-fired furnaces.
Guidelines for connecting water supply and return to coils, and selecting pipe sizes.
Instructions for installing a P-trap for condensate drainage and freeze protection.
Specifies copper pipe types, pressure ratings, and recommended pipe sizes for R410A systems.
Table detailing refrigerant line connections for DOAS units and outdoor units.
Details piping lengths, equivalent lengths, and size selection rules for various outdoor units.
Guide to calculating additional refrigerant charge based on piping length and size.
Provides charge amounts for different DOAS model numbers and factory-charged amounts.
Shows connections and dimensions for MPF-1 and MPF-2 housing sizes, and pipe sizes.
Identifies high and low voltage components within the main control center.
Describes components and operation of optional dual furnaces for increased output.
Explains the phase monitor's function in detecting phase reversal, imbalance, or brownouts.
Details VFD operation for CAV/VAV systems and external signal integration.
Describes CO2 sensor modulation of supply fan speed for optimal air quality.
Explains a dedicated circuit for exhaust fan operation during power outages.
Details the airflow monitoring system's functionality and display capabilities.
Diagram and description of components for Packaged DX cooling with hot gas reheat and bypass.
Identifies service access ports for connection of gauges and troubleshooting.
Procedure for adjusting the hot gas bypass valve for proper operation.
Diagrams showing components for Split DX systems, including MPF-1 and MPF-2 models.
Lists electrical parts like thermistors, valves, and blocks with their specifications.
Details the operational status of components like solenoid valves and expansion valves in DOAS mode.
Critical safety warnings and cautions before performing unit start-up.
Details for recording unit model, serial number, start-up date, and personnel.
A comprehensive list of checks before unit start-up, including fasteners, filters, and piping.
Lists essential tools needed for unit start-up procedures.
Steps for initiating unit operation, including jumpering and compressor start.
Explains how to calculate and the importance of maintaining voltage imbalance below 2%.
Checking fan for free rotation, offset adjustment, and correct rotation direction.
Explains VFD control of exhaust fan speed and motor amperage checks.
Identifies common sources of vibration and recommends checking troubleshooting sections.
Details field installation of the discharge air temperature sensor downstream of the heat exchanger.
Step-by-step guide for calibrating the airflow monitoring controller using the Field Calibration Wizard.
Instructions for starting up the energy wheel, including drive belt and air seal adjustment.
Details economizer modes (stop/modulate wheel) and frost control (preheat/timed exhaust).
Describes the digital output for remote alarm indication, including wheel rotation alarm.
Semiannual inspection of wheel for cleanliness. Disassembly and cleaning procedures for dirty segments.
Steps for reinstalling energy wheel segments, ensuring correct face orientation.
Inspect belts for wear and proper rotation. Contact representative for replacement.
Guidance on accessing and replacing a wheel bearing if it fails.
Checking the microprocessor screen for alarm conditions and referring to IOM for fault codes.
Explains phase monitor LED status for proper operation and fault detection.
Describes VFD display alarms and the need for hard restarts for faults.
Lists fault codes for the digital scroll compressor controller, including lockout conditions.
Addresses blower failure to operate, motor starter issues, and motor overloads.
Diagnoses low airflow (dirty filters, leaks) and high airflow (speed too high).
Troubleshoots excessive noise or vibration caused by bearings, loose components, or ductwork.
Diagnoses issues like open disconnects, contactor problems, low voltage, or motor protector trips.
Addresses low refrigerant charge, restricted lines, or defective low pressure switches.
Troubleshoots issues causing high pressure cut-out, like fan defects or refrigerant overcharge.
Addresses thermal overload trips due to compressor issues or improper wiring.
Diagnoses hums without starting, checking relays, voltage, and windings.
Troubleshoots noise and vibration, checking mounting, tubing, and rotation.
Addresses high suction pressure due to excessive load, unloaded compressor, or expansion valve issues.
Troubleshoots high discharge pressure from condenser issues or refrigerant overcharge.
Diagnoses low suction pressure from airflow restrictions, filter issues, or expansion valve defects.
Addresses low discharge pressure from insufficient charge or faulty expansion valves.
Troubleshoots short cycling due to faulty controls, poor distribution, or high discharge pressure.
Addresses oil loss issues, checking refrigerant charge and floodback.
Diagnoses lack of cooling from dirty coils, restrictions, or improper settings.
Troubleshoots frosted or wet liquid lines due to restrictions or airflow issues.
Addresses suction line frosting from low airflow or expansion valve malfunction.
Diagnoses frost on evaporator coil from bypass valve issues or low load conditions.
Measures resistance of liquid, gas, and reheat pipe thermistors for normal or abnormal readings.
Checks resistance of the linear expansion valve for normal or abnormal conditions.
Measures the resistance of solenoid valve coils SV10 and SV11 for normal or abnormal readings.
Details LEV connection to the controller and how output pulses affect valve opening.
Illustrates valve opening based on pulses and notes potential sounds or vibrations.
Methods for diagnosing microcomputer circuit failure, locked LEV, or faulty wire connections.
Checks solenoid valve clicking noise, temperature difference, and coil resistance.
Includes cleaning external filters and replacing internal MERV 8 filters.
Checks motor bearings, condensate drain, and condenser coils for cleanliness.
Covers lubrication, damper checks, fastener tightness, door seals, and wiring connections.
Specific semiannual checks for evaporator coil, condenser coil, condensate drain, and fan blades/motors.
Procedure for lubricating moving parts and checking damper operation.
Details fan motor cleaning/lubrication and fan wheel/fastener checks.
Guidance on checking and replacing internal and external filters for optimal airflow.
Procedures for cleaning coils to maintain performance and drain pans to prevent overflow.
General