Greenheck 470658 MSX - Manual

5 ® Model MSX Make-Up Air Installation of Roof Mounted Unit Arrangement DBC 1. Install Curb/Equipment Support(s) Position curb/equipment support(s) on the roof (reference the CAPS submittal for placement of curb/equipment support(s) in relation to the unit). Verify that all unit supports are level, ...

6 ® Model MSX Make-Up Air 7. Install Supply Unit Use a crane and a set of spreader bars hooked to the factory lifting lugs to lift and center the unit on the extension/equipment support(s). Use self-tapping sheet metal screws to fasten the unit to the extension/equipment support(s). 8. Assemble and ...

7 ® Model MSX Make-Up Air Installation of Evaporative Cooling Module (optional) NOTE Small evaporative coolers ship attached to the base unit and require no additional mounting. NOTE The use of all lifting lugs and a set of spreader bars is mandatory when lifting the evaporative cooling module. NOTE...

8 ® Model MSX Make-Up Air Installation of Electrical Wiring IMPORTANT Before connecting power to the unit, read and understand the following instructions and wiring diagrams. Complete wiring diagrams are attached on the inside of the control center door(s). IMPORTANT All wiring should be done in acc...

9 ® Model MSX Make-Up Air Installation of Electric Heater (optional) WARNING Electrical Shock Hazard! Disconnect all power sources before doing any work on the unit. Effect of Low Voltage on Wattage and British Thermal Unit (BTU) The heating elements may be used on voltages lower than the design vol...

10 ® Model MSX Make-Up Air Installation Evaporative Cooler Piping (optional) IMPORTANT All supply solenoids, valves and all traps must be below the roof line or be otherwise protected from freezing. IMPORTANT The supply line should be of adequate size and pressure to resupply the amount of water los...

11 ® Model MSX Make-Up Air Evaporative Cooling with Auto Drain and Fill continued 1. Install the Water Supply Line Supply line opening requirements vary by unit size and arrangement and are field supplied. Connect the water supply line to the float valve through the supply line opening in the evapor...

12 ® Model MSX Make-Up Air Installation of Water Wizard TM (optional) Evaporative Cooling with the Water Wizard™ 1. Install Normally Closed Supply Line/Solenoid Connect the water supply line to the manual supply valve in the unit. Install the supply solenoid in the supply line, upstream of the manua...

13 ® Model MSX Make-Up Air 3. Install Suction Line Install suction line(s) from the compressor to the suction connection(s) which are stubbed through the side of the cabinet. 4. Install the Liquid Line and Thermal Expansion Valve (TEV) (by others) Liquid line openings vary by coil size and circuitin...

14 ® Model MSX Make-Up Air for one minute, the system is ready to be charged or refrigerant in another portion of the system can be opened to the coil. A steady rise in microns would indicate that moisture is still present and that the coil should be further vacuumed until the moisture has been remo...

15 ® Model MSX Make-Up Air Installation of Building Pressure Control (optional) 1. Mount Pressure Tap Using the factory provided bracket, mount the pressure tap to the outside of the unit. Choose a location out of the prevailing winds and away from supply or exhaust fans to assure accurate readings....

16 ® Model MSX Make-Up Air Start-Up - Blower 1. Check the Voltage Before starting the unit, compare the supplied voltage, hertz, and phase with the unit and motor’s nameplate information. 2. Check the Blower Rotation Open the blower access door and run the blower momentarily to determine the rotatio...

17 ® Model MSX Make-Up Air 6. Set-Up Optional Components Adjust the settings on the optional components. See the Control Center Layout in the Reference section for location of optional components. • Heating Inlet Air Sensor Typical setting: 60-70°F (15-21°C) • Cooling Inlet Air Sensor Typical settin...

18 ® Model MSX Make-Up Air 1. Check the Voltage Before starting the heater, compare the supplied voltage, hertz, and phase with the heater’s nameplate information. 2. Airflow Interlock With the supply fan on, verify the electric heater’s airflow interlock (DDS) is made. 3. Set the Unit’s Operating T...

19 ® Model MSX Make-Up Air 1. Check the Installation The media may have been removed during installation, so its orientation should be double checked. The media should be installed with the steeper flute angle sloping down towards the entering air side.Verify that the stainless steel caps and distri...

20 ® Model MSX Make-Up Air Water Wizard™ User Interface Key Function Description Function Key Recommended Water Pressure Chart Housing Size Media Width (inches) Water Pressure (in. wc) MSX-H12 30 20 MSX-H22 43 3 ⁄ 4 36 60 61 MSX-H32 66 72 96* 42 MSX-H35 120* 61 MSX-H38 180* 37 MSX-H42 216* 51 *Multi...

21 ® Model MSX Make-Up Air NOTE The Freeze Temperature is preset to the factory recommended 45°F. Steps 9-11 should only be completed if the Freeze Temperature needs adjustment. NOTE The Freeze Temperature is the temperature at which the supply solenoid closes and the drain solenoid opens to drain t...

22 ® Model MSX Make-Up Air Building Pressure Control — a variable frequency drive is controlled according to input from a pressure sensing device.Turn both knobs to the upper most pressure setting. You may have to remove the outdoor pressure tap tubing. VAV systems should go to maximum speed. Set bo...

23 ® Model MSX Make-Up Air Check Operation - Recirculating Units (optional) NOTE Blower Start-Up, steps 1-5 should be performed before the blower is run. Recirculation Operation The recirculation operation option is recommended when the ventilation equipment provides the primary source of heating fo...

24 ® Model MSX Make-Up Air Operation - Electrical Electrical Sequence 1. Exhaust Fan Contact (S1) Closed (optional) • Power passes through N.C. contact on exhaust fan overload (ST2 OL), which is closed if exhaust fan (M2) has not overloaded • Power passes to exhaust fan starter (ST2) • N.O. contact ...

25 ® Model MSX Make-Up Air Drain Mode Drain Mode locks open the drain solenoid and drains the supply line between the supply solenoid and the media. To activate Drain Mode simultaneously, press the Function and Enter Keys (L2 will light). To deactivate Drain Mode and unlock the drain solenoid, simul...

26 ® Model MSX Make-Up Air Proper supply power at main disconnect Check main voltage (See Blower Start-Up Step #1) Main Disconnect (DS1) Off (Turn Main Disconnect DS1 On) Primary fuses blown (Replace fuses) 24 VAC between terminals R and X? Main Transformer (TR1) Defective (Replace transformer) 24 V...

27 ® Model MSX Make-Up Air Motor Overamps Troubleshooting Air volume too high? Adjust drives or increase external static pressure as needed. (Reference Blower Start-Up Step #5) Motor horsepower too low? Resize motor. Motor voltage correct? Provide proper power supply. (Reference Blower Start-Up Step...

28 ® Model MSX Make-Up Air Insufficient Airflow Troubleshooting Damper(s) not fully opened? Adjust damper linkage(s), or replace faulty actuator(s). (Damper actuators may take a few minutes to open) Filters dirty or clogged Clean or replace filters. (Reference Filter Maintenance in the Maintenance s...

29 ® Model MSX Make-Up Air Excessive Noise or Vibration Troubleshooting Sheaves aligned? Align sheaves. (Reference V-Belt Drive Maintenance in the Maintenance section) Wheel unbalanced? Clean and/or balance wheel(s). Belts worn or loose? Replace worn belts or tighten loose belts. (Reference V-Belt D...

30 ® Model MSX Make-Up Air Electric Heater Does Not Operate (optional) Supply fan must be on for heater to operate Troubleshooting 24 VAC between terminals W1 and X? Heat Switch (S4) Off (Turn Heat Switch (S4) On) Heat Switch not wired (Wire Heat Switch (S4)) 24 VAC between terminals 22 and 21? Main...

31 ® Model MSX Make-Up Air Evaporative Cooler does not Operate (Recirculating pump) Supply fan must be on for cooler to operate Troubleshooting Water Blows through Evaporative Cooler Water supply greater than evaporation and bleed-off rate? Use the main supply valve to reduce the supply of water. Ai...

32 ® Model MSX Make-Up Air Water Wizard™ — Improper Water Supply Troubleshooting 1. Adjust the Manual Supply Valve Adjust the manual supply valve (refer to Start-Up, Water Wizard™). If the recommended water pressure does not provide enough water, increase the pressure until the desired water supply ...

33 ® Model MSX Make-Up Air Maintenance - Routine CAUTION Lock-out the gas and the electrical power to the unit before performing any maintenance or service operations to this unit. V-Belt Drives V-belt drives must be checked on a regular basis for wear, tension, alignment, and dirt accumulation.Chec...

34 ® Model MSX Make-Up Air Maintenance - Routine continued Filters Filter maintenance is generally limited to cleaning and replacement.If aluminum mesh filters are installed, they can be washed in warm soapy water.An adhesive spray can be added to aluminum mesh filters to increase their efficiency.I...

35 ® Model MSX Make-Up Air IMPORTANT Be sure to read and follow the manufacturer’s recommendations before using any cleaning fluid. CAUTION Caution should be used to avoid injury when venting the coil. High pressure and/or high temperature fluids can cause serious injuries. Chilled Water Coils Test ...

36 ® Model MSX Make-Up Air Maintenance - Fall Evaporative Coolers The water should be shut off and all the lines drained when the outside temperature drops below 45°F.Remove drain plugs for the winter.Clean all interior parts of any mineral deposits or foreign materials that may have built-up during...

37 ® Model MSX Make-Up Air Reference Typical Control Center Layout MSX Unit Control Center Layout 7 8 4 6 9 11 12 10 5 14 2 13 18 3 1 16 15 17 Dirty Filter Switch 1. Primary Fuses — provides proper fusing to low voltage transformer. 2. Low Voltage Transformer — provides low voltage to controls and o...

38 ® Model MSX Make-Up Air Start-Up Checklist Unit Model Number _______________________________ (e.g. MSX-120-H32-DB) Unit Serial Number _______________________________ (e.g. 10111000) Start-Up Date _______________________________ Start-Up Personnel Name __________________________Start-Up Company __...

39 ® Model MSX Make-Up Air Maintenance Log Date __________________ Time _____________ AM/PMNotes:___________________________________________________________________________________________________________________________________________________________________________________________________________...

40 Greenheck Catalogs MSX provide additional information describing the equipment, fan performance, available accessories, and specification data. ® Phone: (715) 359-6171 • Fax: (715) 355-2399 • E-mail: [email protected] • Web site: www.greenheck.com 470658 • Model MSX Make-Up Air, Rev. 3, May 2...