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Mechanical Cooling

Constant Volume (Space Comfort

Controller)

The control temperature for a CAV unit is typically the space

temperature. A space temperature sensor must be field

installed into the occupied space and connected to the unit

controller.
The unit goes into the cooling mode of operation when the

control temperature (space temperature) is above the cooling

setpoint by more than ½ the deadband.

Example

– the cooling setpoint is set to 70.0°F and the

deadband is 1.0°F, the unit will not go into the cooling mode of

operation until the space sensor reaches 70.6°F.
When this takes place, the cooling mode of operation will begin

and the 1st stage of compressor operation will start.
The unit controller will turn on the next stage of compressor

operation, or turn off a stage of compressor operation, to

maintain the cooling setpoint temperature within the deadband.

When a compressor stage turns on, the next compressor

stage, up or down, will not take place for the next 4 minutes.

This “4 minutes” is called the stage time. Reference the

“Cooling Setup” menu for the adjustable stage time value.
When a cooling stage is initiated no further operation will take

place within the stage timer limit. In the above example, the

unit will stage down or turn off the cooling mode of operation

when the cooling setpoint reaches 69.4°F.

Variable Air Volume (Discharge Air

Controller)

The unit's cooling mode of operation is controlled by the

control temperature, the change-over temperature, and the

discharge air temperature. The unit goes into the cooling mode

of operation by analyzing the control temperature. The control

temperature for a VAV system is the return temperature.
The unit goes into the cooling mode of operation when

the control temperature (return temperature) is above the

changeover setpoint by more than ½ the deadband.

Example

– If the change over temperature is 70.0°F and the

deadband is 1.0°F, the unit will not go into the cooling mode of

operation until the return temperature reaches 70.6°F.
When this takes place, the cooling mode of operation will begin

and the 1st stage of compressor operation will start.

The unit controller will turn on the next stage of compressor

operation, or turn off a stage of compressor operation, to

maintain the discharge air temperature setpoint within the

deadband. When a compressor stage turns on, the next

compressor stage up or down will not take place for the next 4

minutes. This “4 minutes” is called the stage timer.
When a cooling stage is initiated no further operation will

take place within the stage timer limit. Reference the Cooling

Setup menu for the adjustable stage time value. In the above

example, the unit will stage down or turn off the cooling mode

of operation when the return temperature reaches 69.4°F.

Economizer

When the economizer is enabled, the outside air temperature

is below the changeover setpoint, and the differential enthalpy

switch (if installed) is made, the economizer becomes the

first stage of cooling. It will modulate to control to either the

discharge air temperature (VAV) or space temperature (CV).
Every 4 minutes, the unit can then either add mechanical

cooling if the economizer is at 100% open, continue

economizing, or if the control temperature is satisfied, return to

minimum position and transition back to “Fan Only” mode.
If the enthalpy switch breaks or the outside air warms, the unit

will exit economizing and continue to mechanically cool while

returning to the minimum position for ventilation.

eqUenCe

PeraTIon

www.DaikinApplied.com

IM 1058-8 • MAVERICK II ROOFTOP SYSTEMS

Содержание MPS015 F

Страница 1: ...1058 8 Group Applied Air Systems Part Number IM 1058 Date July 2017 Maverick II Commercial Packaged Rooftop Systems Heating and Cooling Models MPS015F 0050F 15 to 50 Tons R 410A Refrigerant MicroTech III Unit Controller Energy Recovery Wheel ...

Страница 2: ...urement Technology 48 Unit Options 53 Economizer Enthalpy Contro 53 External Time Clock 53 Exhaust Fan Option 53 Proof of Airflow and Dirty Filter Switch 53 Duct High Pressure Limit 53 Convenience Receptacle Field Powered 54 Convenience Receptacle Unit Powered 54 Condenser Fan Operation for Variable Speed Compressor Low Ambient Option 55 VFD Compressor Operation 56 Variable Speed Scroll Compressor...

Страница 3: ...n Manual bulletin number VFDs OM 844 MD2 OM 895 MD3 OM 1190 MD4 OM 1191 MD5 OM 847 MD6 MPS Unit Controller Discharge Air Control VAV or CAV Space Comfort Control SCC OM 920 LonWorks Integration IM 918 BACnet Integration IM 917 BACnet IP Comm Module IM 916 Unit Nameplate The unit nameplate is located on the outside of the main control box door It includes the unit model number serial number electri...

Страница 4: ... file a claim In most cases equipment is shipped F O B factory and claims for freight damage should be filed by the consignee Before unloading the unit check the unit nameplate to make sure the voltage complies with the power supply available Service Clearance Allow service clearances as approximately indicated in Figure 1 Also Daikin recommends providing a roof walkway to the rooftop unit as well...

Страница 5: ...air recirculation Overhead Clearance 1 Unit s surrounded by screens or solid walls must have no overhead obstructions over any part of the unit 2 The area above the condenser must be unobstructed in all installations to allow vertical air discharge 3 The following restrictions must be observed for overhead obstructions above the air handler section a There must be no overhead obstructions above th...

Страница 6: ...urbing assembly and securely tighten all screws 4 Position curb assembly over roof openings Curb must be level within 0 25 inches from side to side and 1 50 inches over its length Check that top surface of curb is flat with no bowing or sagging 5 Weld curb assembly in place Caulk all seams watertight Remove backing from 0 25 1 50 wide gasket and apply to surfaces shown by crosshatching 6 Check tha...

Страница 7: ...Figure 3 Roof Curb Layout MPS 015F 020G Mechanical Installation www DaikinApplied com 7 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 8: ...m TYP 1 63 41 mm 93 70 2380 mm 171 18 INSIDE CURB 4348 mm 63 69 1610 mm 2 00 51 mm 2 00 51 mm 1 00 26 mm 1 00 26 mm 2 00 51 mm 3 75 95 mm PLAN VIEW 23 86 606 mm CURB CROSS SECTION KNOCKOUT DETAIL F HOT WATER ONLY CHASE 1 00 25 mm 19 00 483 mm 0 38 9 7 mm 0 38 9 7 mm IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 8 www DaikinApplied com Mechanical Installation ...

Страница 9: ...YP 32 mm 1 63 41 mm 69 39 1763 mm 105 45 2678 mm 208 57 INSIDE CURB 5298 mm 71 38 1813 mm 15 87 403 mm 28 25 718 mm 2 00 51 mm 2 00 51 mm 1 00 25 mm 3 75 95 mm 28 92 735 mm PLAN VIEW F 1 00 25 mm 26 00 660 mm HOT WATER ONLY CHASE 0 38 9 7 mm 0 38 9 7 mm Mechanical Installation www DaikinApplied com 9 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 10: ...Figure 6 MPS 015 020 Roof Curb with Energy Recovery Wheel IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 10 www DaikinApplied com Mechanical Installation ...

Страница 11: ...Mechanical Installation Figure 7 MPS 026 035 Roof Curb with Energy Recovery Wheel Mechanical Installation www DaikinApplied com 11 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 12: ...Figure 8 MPS 040 050 Roof Curb with Energy Recovery Wheel IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 12 www DaikinApplied com Mechanical Installation ...

Страница 13: ...le length from the bracket to the hook should always be longer than the distance between the outer lifting points If the unit is stored at the construction site for an intermediate period take these additional precautions 1 Support the unit well along the length of the base rail 2 Level the unit no twists or uneven ground surface 3 Provide proper drainage around the unit to prevent flooding of the...

Страница 14: ... 040 350 175 350 307 050 350 175 350 307 Table 8 Curb Weights Unit tons Curb Height inches Weight lbs without ERW with ERW 015 035 14 341 458 015 035 24 501 674 040 050 14 481 619 040 050 24 708 908 Table 9 Energy Recovery Section Weights Unit Size tons Weight lbs 015 020 1200 026 035 1540 040 050 1000 Table 10 Additional Weights Motors Exhaust Fans 015 020 HP Additional Motor Weight lbs Unit tons...

Страница 15: ...into the building drainage system pitch the drain line away from the unit a minimum of 1 8 per foot The drain line must penetrate the roof external to the unit Refer to local codes for additional requirements Sealed drain lines require venting to provide proper condensate flow Where the cooling coils have intermediate condensate pans on the face of the evaporator coil copper tubes near both ends o...

Страница 16: ...nd replace if necessary Protect the unit from overhead runoff from overhangs or other such structures CAUTION Transportation rigging or maintenance can damage the unit s weather seal Periodically inspect the unit for leakage Standing moisture can promote microbial growth disease or damage to the equipment and building Installing Ductwork On vertical supply vertical return units if a Daikin roof cu...

Страница 17: ...ct diameters away from take off points bends neckdowns attenuators vanes or other irregularities 5 Use a static pressure tip Dwyer A302 or equivalent or the bare end of the plastic tubing for the duct tap If the duct is lined inside use a static pressure tip device 6 Install the duct tap so that it senses only static pressure not velocity pressure If a bare tube end is used it must be smooth squar...

Страница 18: ...way from the condenser fans walls or anything else that may cause air turbulence Mount it high enough above the roof so it is not affected by snow Not connecting the reference tap to the sensor results in unsatisfactory operation 6 Use an outdoor static pressure tip Dwyer A306 or equivalent to minimize the adverse effects of wind Place some type of screen over the sensor to keep out insects Loosel...

Страница 19: ... long wires are required it may be necessary to increase the wire size to prevent excessive voltage drop Wires should be sized for a maximum of 3 voltage drop Supply voltage must not vary by more than 10 of nameplate Phase voltage imbalance must not exceed 2 Calculate the average voltage of the three legs The leg with voltage deviating the farthest from the average value must not be more than 2 aw...

Страница 20: ... alarm output External discharge air temperature reset Outdoor air damper minimum position adjustment Descriptions of these field connections are included in the MicroTech III Unit Controller manual OM 920 WARNING Electrical shock hazard Can cause severe injury or death Connect only low voltage NEC Class II circuits to terminal block TB2 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 20 www DaikinApplied c...

Страница 21: ...ating the fans Figure 18 shows a typical spring mount with a height adjustment nut and a shipping bolt After removing the shipping bolts rock the fan assembly by hand to check for freedom of movement Adjusting Spring Mounts During operation all fans should ride level Level the fan assembly by performing the following 1 Loosen the 3 8 cap screw do not remove 2 Loosen the spring cap nut 3 Rotate the...

Страница 22: ... to the furnace assembly It contains information including gas type maximum and minimum input rating manifold pressure maximum and minimum inlet gas pressure maximum and minimum airflow requirements output capacity and electrical rating for the furnace The plate also includes model number serial number and scan code This plate is to always remain attached to the furnace This furnace must be applie...

Страница 23: ...e furnace down and closes at 130 F The auxiliary limit switch is a manual reset and opens up at 180 F to shut the furnace down Figure 19 Gas Heat Section Gas Heating Capacity Data Table 15 MPS 015F 050F Gas Heating Capacities Data Unit Size 015 020 026 035 040 050 Low Heat High Heat Low Heat High Heat Low Heat High Heat Heating Input MBh 240 480 300 600 400 800 Heating Output MBh 192 384 240 480 3...

Страница 24: ...ill void all warranty coverage by the manufacturer Questions regarding specific contaminants should be referred to your local gas utility Ventilation Flue Pipe Requirements The Daikin rooftop unit is equipped with an outdoor air hood to supply adequate combustion air The unit also has a flue outlet assembly and requires no additional chimney flue pipe Breidert cap draft inducer etc Factory Checkou...

Страница 25: ...e flue box must be installed over the combustion exhaust openings All holes are prepunched the fasteners are furnished and everything is shipped inside the fan section 1 Remove and discard the shipping covers 2 Position the flue box over the exhaust openings 3 Line assembly holes up 4 Install screws to fasten the flue box to the side of the unit Figure 21 Flue Box Installation Outdoor Air OA Hood ...

Страница 26: ...h pressure regulator and the outlet pressure must furnish gas to the appliance pressure regulator within the pressure range mentioned above Gas Piping Gas piping must be sized to provide the minimum required pressure at the burner when the burner is operating at maximum input Consult your local utility on any questions on gas pressure available allowing piping pressure drops and local piping requi...

Страница 27: ...o confirm gas heating value has been devalued for applicable elevations Table 16 Furnace Identification for Altitude Elevation ft Part Number Natural Gas Fired Furnace with 50 MBH Burners 2000 2999 910166410 3000 3999 910166411 4000 4999 910166412 5000 5999 910166413 6000 6999 910166415 Natural Gas Fired Furnace with 45 MBH Burners 2000 2999 910166412 3000 3999 910166416 4000 4999 910166417 5000 5...

Страница 28: ...ducing gas regulator as required to obtain 7 0 wc gas pressure 2 The gas pipe manifold pressure for high fire should be set at 3 2 wc Adjust the High Pressure Adjustment on the Honeywell VR8305Q Gas Safety Control Valve Figure 25 as required Screwing the adjustment clockwise will increase pressure counter clockwise will decrease pressure 3 The gas pipe manifold pressure for low fire stage 1 should...

Страница 29: ...d gas pressure at the Inlet Pressure Tap of the Honeywell VR8305Q Gas Safety Control Valve Figure 25 and confirm pressure is at 11 0 wc Adjust upstream pressure reducing gas regulator as required to obtain 11 0 wc gas pressure 2 The gas pipe manifold pressure for high fire should be set at 8 2 wc Adjust the High Pressure Adjustment on the Honeywell VR8305Q Gas Safety Control Valve Figure 25 as req...

Страница 30: ... 1 55 0 622 Butane 2 00 0 547 Table 18 Pressure Drop Other Than 0 3 Pressure Drop Multiplier Pressure Multiplier 0 1 0 577 1 0 1 83 0 2 0 815 2 0 2 58 0 3 1 000 3 0 3 16 0 4 1 16 4 0 3 65 0 6 1 42 6 0 4 47 0 8 1 64 8 0 5 15 Sequence of Operation Staged Control Low Heat Option 2 Stage Control The following details the sequence of operation for the low heat option 1 Unit DDC control calls for heat 2...

Страница 31: ...h is checked for combustion airflow 5 45 second prepurge cycle starts 6 Spark ignitor is activated 7 Gas valve receives a signal to open fully 8 Burner is ignited and runs for 30 seconds in high fire 9 Modulating burner gas valve and induction blower motor receives a signal to modulate burner output to match the unit discharge air temperature setting 10 If modulating burner is unable to meet disch...

Страница 32: ...r Immediately call a qualified service technician to inspect the appliance and to replace any part of the control system and any gas control which has been under water Start Up Responsibility The start up organization is responsible for determining that the furnace as installed and as applied will operate within the limits specified on the furnace rating plate 1 The furnace must not operate at an ...

Страница 33: ...nostic information Maintenance Planned maintenance is the best way to avoid unnecessary expense and inconvenience Have this system inspected at regular intervals by a trained and experienced service technician The following service intervals are typical for average situations but will have to be adjusted to suit your particular circumstances Fuel pressure settings and control settings should be ma...

Страница 34: ...ure 3 Replace pressure switch if fails to function correctly 3 Flashes Lockout Ignition locked out from too many ignition attempts Ignition lockout from too many trials 1 Verify gas supply is present 2 Verify gas safety valve is working correctly 3 Verify gas manifold pressure is adequate and correct 4 Check spark igniter is not cracked or dirty Check spark igniter wire is not covered with oil and...

Страница 35: ... air pressure reads above zero level when the inducer is off 3 Flashes Flame is on when is should be off or flame is off when it should be on 4 Flashes Gas valve is on when is should be off or gas valve is off when it should be on 5 Flashes Safety relay is on when it should be off or safety relay is off when it should be on 6 Flashes Excessive plenum temperature 7 Flashes High limit switch is open...

Страница 36: ...gniter board modulating gas valve and to the induce draft motor 24VAC 115VAC LOW PRESSURE SWITCH LPS HIGH PRESSURE SWITCH HPS L1 1 2 7 8 Inducer Fan Motor Modulating Gas Valve C 24 VAC violet green orange W2 W1 R FS black red black FLAME SENSOR SPARK IGNITOR red white black white L1 L2 GND red white green UTEC 1171 63 P1 6 P1 9 P1 5 P1 8 P2 3 P2 4 P2 2 orange orange ROS1 ROS2 SC30 2 stage gas valv...

Страница 37: ... cracked ceramic and damaged or disconnected wire connection Check ignition wire for cracks coated with oil and debris 5 Check for air leaks at inducer fan assembly and flue 6 Check for recirculation of exhaust flue gases 7 If all above condition are OK replace ignition board 5 Flashes Lockout Burners light and then drop out resulting in too many flame failures Lockout from too many flame losses 1...

Страница 38: ...tion is the secondary auxiliary high limit switch which shut the heater down at 285 F This switch requires a manual reset Figure 31 Electric Heat Section Electric Heating Capacity Data Table 22 MPS 015 050 Electric Heating Capacities Tons Nom cfm Stages Low Medium High kW Min cfm MBh Delta T kW Min cfm MBh Delta T kW Min cfm MBh Delta T 15 6000 4 18 950 61 9 5 36 1900 123 19 0 72 3800 246 38 0 17 ...

Страница 39: ... be over cooled by the DX coil Hot gas from the unit condenser will be routed to an indoor coil downstream of the DX coil to reheat the air Hot gas reheat valves will control how much hot gas is routed to the indoor coil to maintain a discharge air setpoint Figure 33 Figure 32 Ideal for Neutral Air Ventilation Control Figure 33 Dual 2 Way Valve Refrigeration Schematic Optional Modulating Hot Gas R...

Страница 40: ...d air to a desirable value MHGRH is comprised of a parallel coil arrangement with both the condenser and reheat coils of the micro channel type dual reheat valves which operate in concert with one another and a check valve MHGRH components will always be installed in circuit 2 During Dehumidification control w modulating Hot Gas Reheat MHGRH an analog signal 0 10Vdc is controlled as described belo...

Страница 41: ... modulate the reheat valves from this starting position Reheat valve s must be at 0 0 Vdc position before starting the first compressor in the reheat circuit to prevent pressure spikes Upon termination of dehumidification reheat the maximum ramp down or decay rate of the reheat control valves shall be 1 per sec or 0 1V per sec Upon termination of dehumidification reheat staging of compressor s is ...

Страница 42: ...event air and water leakage NOTE Factory installed piping is copper Dissimilar metal within the plumbing system can cause galvanic corrosion To avoid corrosion provide proper di electric fittings as well as appropriate water treatment CAUTION Coil freeze possible Can damage equipment Follow instructions for mixing antifreeze solution Some products have higher freeze points in natural state than wh...

Страница 43: ...Hot Water Pressure Drop Data Figure 37 MPS 015 017 Low and High Heat Figure 38 MPS 020 Low and High Heat Optional Hot Water Heat www DaikinApplied com 43 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 44: ...Figure 39 MPS 026 035 Low and High Heat Figure 40 MPS 040 050 Low and High Heat IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 44 www DaikinApplied com Optional Hot Water Heat ...

Страница 45: ...cumferential or to the inner post Cassette The steel structure that houses the rotor Cassettes are of punched sheet metal panelized construction Enthalpy wheel A generic name for an energy conservation wheel The term enthalpy refers to an air stream s total energy temperature and humidity level Exhaust air The air stream that is exhausted to the outside Exhaust air is building return air that has ...

Страница 46: ...ion Figure 43 Purge Detail Any leakage must occur from outside to Exhaust Air due to pressure gradient Supply Air Outside Air at Atmospheric Pressure Exhaust Air Adjustable Purge See Detail Plenum Exhaust Fan draws a negative pressure NOTE Maintain the pressure gradient to prevent cross contamination from the Exhaust to Outside Supply Air OUTSIDE AIR EXHAUST AIR Adjust purge in this direction to d...

Страница 47: ... so that less enthalpy transfer occurs and frosting of the wheel is avoided Frosting can occur on the enthalpy wheel when the exhaust air leaving the wheel is saturated This condition occurs when two lines intersect on a psychrometric chart and it does not occur when these two lines do not intersect see Figure 44 Energy Recovery Exhaust Hoods Units with the optional energy recovery section have on...

Страница 48: ...4 VAC to the outdoor air monitor controller a 24VAC from the unit control panel to the controller terminals L1 and L2 Outdoor Air Monitor Controller Settings 1 Set Controller SW1 switch to Vdc 2 Set power switch to ON Outdoor Air Monitor Controller Configuration Set Up see Appendix Figure 102 on page 129 for navigating the Controller keypad 1 Set LCD1 U M to CFM 2 Set AR1 see Table 24 3 Set OUT1 U...

Страница 49: ...Figure 47 MicroTech III Controller Figure 48 Transmitter and Connector Detail Transmitter Connector Optional Outdoor Air Monitor www DaikinApplied com 49 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 50: ...nu See Appendix Figure 103 on page 130 If you wish to manually convert the velocity output to volumetric flow CFM or LPS simply multiply the indicated output velocity in FPM or MPS by the free area of the air flow probe installation location free area x 1000 for SI units when area is calculated in square meters For P sensors the total free area is programmed into the probe at the factory and is pr...

Страница 51: ...he ON position The green Transmitter Status LED D3 on the main circuit board is flashing at 1 second intervals No problem normal operation No remedy required The green Transmitter Status LED D3 on the main circuit board is flashing at 2 second intervals The sensor detection system has detected one or more malfunctioning or missing sensors Check sensor probe cable connections If sensor probe connec...

Страница 52: ...ctor of the transmitter does not match that of the host controls Compare the value of the Area or K factor of the transmitter with that of the host control system and make adjustments to ensure a match The returned value for airflow is zero when airflow is indicated on the LCD display of the transmitter The Low Limit airflow cutoff value is above the actual airflow reading Decrease the Low Limit a...

Страница 53: ...y Filter Switch The proof of airflow switch PC7 and the dirty filter switch PC5 are supplied on all CAV units The tubing is installed to the switches per Figure 49 The proof of airflow switches senses the pressure difference between the positive pressure in the supply air fan compartment and the suction pressure on the leaving air side of the filters The differential pressure is factory set at 0 2...

Страница 54: ...he receptacle shall be powered by a factory installed and wired 120V 20 amp power supply The power supply shall be wired to the line side of the unit s main disconnect so the receptacle is powered when the main unit disconnect is off This option shall include a GFI receptacle transformer and a branch circuit disconnect The electrical circuit shall be complete with primary and secondary overload pr...

Страница 55: ...y Speed reference Level in which the VFD will stop the condenser fan motor under certain conditions If the head pressure were to fall below 250 PSIG with the condenser fan operating at minimum speed of 10Hz possibly due to a low ambient or high wind condition the VFD will shut down the condenser fan The VFD will restart the condenser fan at 20 Hz if head pressure rises to a level above 250 PSIG In...

Страница 56: ... continue to operate on the remaining fixed speed compressors of the non VFD circuit until the unit can be serviced When the VFD compressor is at its maximum speed and more capacity is required a fixed speed compressor is started while the VFD compressor is reduced to minimum speed at which point it resumes modulating to maintain the discharge temperature When the VFD compressor is at its minimum ...

Страница 57: ...hen dehumidification operation becomes active while the unit is in the Cooling operating state The VFD compressor is ramped to its maximum capacity If the VFD capacity at this point is already above 75 of its full modulation a fixed compressor is also turned on The compressors are held at this capacity for 1 minute before normal modulation resumes to maintain leaving coil temperature LCT VFD compr...

Страница 58: ...isabled if the oil boost sequence is initiated more than 4 times in a 24 hour period If the oil balance boost sequence successfully restores the VFD compressor oil level the fixed compressor stage is returned to its pre oil balance boost condition and normal compressor sequencing and modulation resumes VFD Compressor Protection Unloading Control There are several modulating control functions that ...

Страница 59: ...minutes the VFD compressor speed is increased by 5 rps increments up to a 60 rps operating speed Superheat is monitored at each speed for 10 minutes and if superheat remains below 20F the VFD compressor speed is increased an additional 5 rps When compressor discharge superheat level is at 20F or above the compressor speed is no longer increased If speed correction resolves problem the unit control...

Страница 60: ... the discharge pressure exceeds 250 PSIG When the VFD compressor reaches 250 PSIG this speed becomes the new minimum speed of the VFD compressor As the discharge pressure rises above 250 PSIG the minimum allowable compressor speed is decreased in 5 rps increments every 30 seconds If the condenser coil splitter valve is closed and the VFD compressor discharge remains below 250 PSIG for 15 minutes t...

Страница 61: ...e speed compressor enhances energy efficiency and capable of providing unit capacity modulation down to 20 and reduces compressor cycling and wear on compressor Daikin rooftop units with variable speed Inverter compressors are provided with Internal Permanent Magnet IPM motors Compressors are designed to vary capacity by modulating the speed of the scroll set The speed ratio for the IPM motor comp...

Страница 62: ...l Dismanteling Optical Oil Level Sensor An optical oil sensor is used to monitor oil level in VFD compressor sump The sensor is mounted directly to a fitting on the VFD compressor shell and can be removed without having to depressurize reclaim the refrigeration system Optical oil indication signal is sent to MTIII Expansion Module C terminals X3 M Normal oil indication will provide a contact closu...

Страница 63: ...t for an open loop configuration with 0 10Vdc reference corresponding to 1500 6000 Rpm The compressor drive generates a soft start with an initial ramp of 2 seconds In rush current or LRA to the VFD compressor is typically not more than a few percent more than rated nominal Current Compressor Speed modulation signal frequency signal compressor amperage are all displayed in real time on the compres...

Страница 64: ...Wiring Diagrams Figure 61 VAV Power Fixed Speed Scroll Compressor IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 64 www DaikinApplied com Wiring Diagrams ...

Страница 65: ...Figure 61 continued VAV Power Fixed Speed Scroll Compressor Wiring Diagrams www DaikinApplied com 65 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 66: ...Figure 62 MPS 026 VAV Power with Variable Speed Inverter Compressor IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 66 www DaikinApplied com Wiring Diagrams ...

Страница 67: ...Figure 62 continued MPS 026 VAV Power with Variable Speed Inverter Compressor Wiring Diagrams www DaikinApplied com 67 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 68: ...Figure 63 MPS 030 050 VAV Power with Variable Speed Inverter Compressor IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 68 www DaikinApplied com Wiring Diagrams ...

Страница 69: ...Figure 63 continued MPS 030 050 VAV Power with Variable Speed Inverter Compressor Wiring Diagrams www DaikinApplied com 69 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 70: ...Figure 64 VAV Control Inputs IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 70 www DaikinApplied com Wiring Diagrams ...

Страница 71: ...Figure 64 continued VAV Control Inputs Wiring Diagrams www DaikinApplied com 71 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 72: ...Wiring Diagrams Figure 65 MPS 026 VAV Control with Variable Speed Inverter Compressor IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 72 www DaikinApplied com Wiring Diagrams ...

Страница 73: ...Figure 65 continued MPS 026 VAV Control with Variable Speed Inverter Compressor Wiring Diagrams www DaikinApplied com 73 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 74: ...Figure 66 MPS 026 with Variable Speed Inverter Compressor without Low Ambient Option IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 74 www DaikinApplied com Wiring Diagrams ...

Страница 75: ...Figure 67 MPS 030 050 VAV Control with Variable Speed Inverter Compressor Wiring Diagrams www DaikinApplied com 75 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 76: ...Wiring Diagrams Figure 67 continued MPS 030 050 VAV Control with Variable Speed Inverter Compressor IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 76 www DaikinApplied com Wiring Diagrams ...

Страница 77: ...Figure 68 MPS 040 050 with Variable Speed Inverter Compressor with Low Ambient Option Wiring Diagrams www DaikinApplied com 77 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 78: ...Figure 69 VAV Control Outputs Staged Gas Heat IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 78 www DaikinApplied com Wiring Diagrams ...

Страница 79: ...Figure 69 continued VAV Control Outputs Staged Gas Heat Wiring Diagrams www DaikinApplied com 79 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 80: ...Figure 70 CAV Power IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 80 www DaikinApplied com Wiring Diagrams ...

Страница 81: ...Figure 70 continued CAV Power Wiring Diagrams www DaikinApplied com 81 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 82: ...Figure 71 CAV Control Inputs IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 82 www DaikinApplied com Wiring Diagrams ...

Страница 83: ...Figure 71 continued CAV Control Inputs Wiring Diagrams www DaikinApplied com 83 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 84: ...Wiring Diagrams Figure 72 CAV Control Outputs Staged Gas Heat Figure 73 VAV CAV Control Outputs Modulating Gas Heat IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 84 www DaikinApplied com Wiring Diagrams ...

Страница 85: ...Figure 74 Electric Heat Option Power Figure 75 Electric Heat Option Outputs Wiring Diagrams www DaikinApplied com 85 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 86: ...Figure 76 Energy Recovery IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 86 www DaikinApplied com Wiring Diagrams ...

Страница 87: ...Figure 76 continued Energy Recovery Wiring Diagrams www DaikinApplied com 87 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 88: ...Wiring Diagrams Figure 77 Energy Recovery Main Control Board IM 1058 8 MAVERICK II ROOFTOP SYSTEMS 88 www DaikinApplied com Wiring Diagrams ...

Страница 89: ...Figure 77 continued Energy Recovery Main Control Board Wiring Diagrams www DaikinApplied com 89 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS ...

Страница 90: ... for CAV units The unit goes into the heating mode of operation when the control temperature return or space temperature is below the heating setpoint by more than the deadband Example If the heating setpoint is 68 0 F and the deadband is 1 0 F the unit will not go into the heating mode of operation until the control temperature reaches 67 4 F When this takes place the heating mode of operation wi...

Страница 91: ...into the cooling mode of operation when the control temperature return temperature is above the changeover setpoint by more than the deadband Example If the change over temperature is 70 0 F and the deadband is 1 0 F the unit will not go into the cooling mode of operation until the return temperature reaches 70 6 F When this takes place the cooling mode of operation will begin and the 1st stage of...

Страница 92: ...ed 3 Verify that all construction debris is removed and that the filters are clean 4 Verify that all electrical work is complete and properly terminated 5 Verify that all electrical connections in the unit control panel are tight and that the proper voltage is connected 6 Verify all nameplate electrical data is compatible with the power supply 7 Verify the phase voltage imbalance is no greater tha...

Страница 93: ... economizer operation in both low and high enthalpy states on the same day If this is the case repeat this procedure on another day when the opposite outdoor air enthalpy conditions exist Compressor Start Up CAUTION Low ambient temperature hazard Can cause compressor damage Do not attempt to start up and check out the refrigeration system when the outdoor air temperature is below 20 F With the sup...

Страница 94: ...urn air entering the unit f Verify that the liquid line components expansion valve and distributor tubes are feeding the evaporator coil g Verify that all air handling section panels are closed 4 Verify that the condenser fans are cycling and rotating properly blowing air upward When the compressor starts at least one condenser fan should also start 5 Check the oil level in the compressor sightgla...

Страница 95: ...e ideal tension is the lowest tension at which the belt will not slip under peak load conditions Over tensioning shortens belt and bearing life 2 Check tension frequently during the first 24 48 hours of operation 3 Keep belts free from foreign material which may cause slippage 4 Make V drive inspection on a periodic basis Adjust tension if the belt is slipping Do not apply belt dressing This may d...

Страница 96: ...lty starting disconnect power and inspect for excessive interference between the wheel surface and each of the 4 diameter seals Diameter Seal Adjustment 1 Loosen diameter seal adjusting screws See Figure 81 2 Move adjustable diameter seals away from wheel 3 Using a inch feeler gauge adjust the diameter against the wheel See Figure 81 4 Tighten diameter seal adjusting screws 5 Apply power per the s...

Страница 97: ...re setpoint 4 Set the alarm limits as required 5 Set the duct static pressure control parameters as required 6 Set the building static pressure control parameters as required 7 Set the economizer control parameters as required 8 Set the date and time in keypad menu 9 Set the operating schedule as required using keypad menus NOTE Unit operation may also be controlled by the building automation syst...

Страница 98: ...ectric power to the unit when servicing control panel components Before servicing always inspect units for multiple disconnects to ensure all power is removed from the control panel and its components Planned Maintenance Preventive maintenance is the best way to avoid unnecessary expense and inconvenience Have this system inspected at regular intervals by a qualified service technician The require...

Страница 99: ... Coil to Copper Tubing Figure 83 shows the aluminum condenser coil connection to the copper tubing in the unit Because of the low melting point of aluminum 1220 F compared to 1984 F for copper this brazed joint is performed with a low temperature brazing process CAUTION Potential equipment damage If a standard copper brazing process is performed at this joint the process will damage the aluminum c...

Страница 100: ...ely removed prior to using low velocity clean water rinse Periodic Clean Water Rinse A monthly clean water rinse is recommended for coils that are applied in coastal or industrial environments to help to remove chlorides dirt and debris An elevated water temperature not to exceed 130ºF will reduce surface tension increasing the ability to remove chlorides and dirt Pressure washer PSI must not exce...

Страница 101: ...o thoroughly wet out surface with no areas missed This may be accomplished by use of a pump up sprayer or conventional spray gun The method does not matter as long as the entire area to be cleaned is wetted After the substrate has been thoroughly wetted the salts will be soluble and is now only necessary to rinse them off 3 Rinse It is highly recommended that a hose be used as a pressure washer wi...

Страница 102: ...non authorized trip point or setpoint adjustment voids all or portions of the unit s warranty Authorized setpoint adjustment is accomplished as follows 1 For motors with a 1 15 service factor rotate the arrow on the dial to correspond to the motor FLA 2 For motors with a 1 0 service factor multiply the motor FLA by 0 9 then rotate the arrow on the dial to correspond to that value To reset a trippe...

Страница 103: ...Ds to provide short circuit protection These breakers are not adjustable To reset a tripped circuit breaker Clear the trip by rotating the lever down to the OFF position Then rotate lever up to the ON position see Figure 86 Breakers like MMPs have three distinct modes of operation which are clearly indicated by the handle position The positions are ON usually up OFF usually down and TRIPPED midway...

Страница 104: ...activates after power line conditions return to an acceptable level for a specified amount of time Restart Delay The trip and restart delays prevent nuisance tripping due to rapidly fluctuating power line conditions There are two LEDs on the face of the PVM 1 in Figure 88 to indicate the following items in Table 32 Figure 88 Phase Voltage Monitor Table 32 LED Indication Status LED Indicator Normal...

Страница 105: ...ovide adequate protection from vandalism mechanical contact etc Make sure all doors are securely closed and all latches closed Units should be fitted with covers over the supply and return air openings Preparation for Storage Supply Fans 1 Remove the drive belts tag them with the fan name and unit serial number and store them in a conditioned space out of direct sunlight 2 Once every two weeks rot...

Страница 106: ...e temperature variations or other severe atmospheric conditions relubricate more frequently Use one of the greases shown in Table 33 While the bearing is at normal operating temperatures rotate the fan by hand and add only enough grease to purge the seals The seals bleed slightly when this occurs Do not overlubricate Table 33 Recommended Greases Manufacture Product Name Temp Range F Texaco Lubrica...

Страница 107: ...Annually confirm set screw is secure Drive Belts The wheel drive belt is a urethane stretch belt designed to provide constant tension through the life of the belt No adjustment is required Inspect the drive belt annually for proper tracking and tension A properly tensioned belt will turn the wheel immediately after power is applied with no visible slippage during start up Belts are multilink with ...

Страница 108: ...acid based coil cleaner such as Acti Klean available through Daikin Stock AK1 or alkaline detergent and warm water Soak in the solution until grease and tar deposits are loosened Note some staining of the desiccant may remain and is not harmful to performance Before removing rapidly run finger across surface of segment to separate polymer strips for better cleaning action Rinse dirty solution from...

Страница 109: ... wheel 180 Install the second segment opposite the first for counter balance Rotate the two installed segments 90 to balance the wheel while the third segment is installed Rotate the wheel 180 again to install the fourth segment opposite the third Repeat this sequence with the remaining four segments Figure 91 Segment Retaining Clip Figure 92 Installing Wheel Segments Wheel Drive Motor Pulley Repl...

Страница 110: ...placement Troubleshooting The following table may be used as a quick reference for identifying common symptoms and possible causes related to the recovery wheel Table 34 Energy Recovery Wheel Troubleshooting Symptom Cause Inadequate Wheel Performance Check wheel rotation speed see Variable Speed Frequency Control on page 47 Check for wheel integrity and adjust seals or replace worn seals see Energ...

Страница 111: ...ant Replace pressure switch after reclaiming refrigerant Venting refrigerant to atmosphere is not allowed per most local laws and or codes Servicing Refrigerant Sensors or Switches The Maverick II includes the following refrigerant sensors or switches 1 Low refrigerant pressure sensing operating switch automatic reset a Disables associated compressors on a drop in suction pressure to approximately...

Страница 112: ...Daikin Parts Department for compressor availability 2 Send a completed parts order form to the Daikin Parts Department 3 The Parts Department processes the order and the compressors are shipped from our Dayton OH warehouse via ground transportation If next day air is required indicate this on the parts order form and a freight charge will be billed to your account Air freight costs are not covered...

Страница 113: ..._______________________________________________________________ Company name ________________________________________________________________________________________________ Address ______________________________________________________________________________________________________ City State Zip __________________________________________________________________________________________________ U...

Страница 114: ...re all electrical power connections tight Check compressorelectrical box Yes No N A K Is the condensate drain trapped Yes No N A II FAN DATA A Check rotation of supply fan Yes No N A B Voltage at supply fan motor 1 2_____________ V 2 3 _____________ V 1 3 _____________ V C Supply fan motor amp draw per phase L1 _____________ L2 _____________ L3 _____________ D Fuse sizes __________________________...

Страница 115: ...__ Phase 3 _______ C Low pressure cut out Circuit 1 __________ psig Circuit 2 __________ psig D Low pressure cut in Circuit 1 __________ psig Circuit 2 __________ psig E High pressure cut out Circuit 1 __________ psig Circuit 2 __________ psig F Discharge pressure one compressor Circuit 1 __________ psig Circuit 2 __________ psig G Discharge pressure fully loaded 2 3 compressors Circuit 1 ________...

Страница 116: ...6 Phase L1 ___________ ____________ ____________ ___________ ___________ ____________ Phase L2 ___________ ____________ ____________ ___________ ___________ ____________ Phase L3 ___________ ____________ ____________ ___________ ___________ ____________ G FLA L1 ___________ L2____________ L3 ___________ H Operate electric heat with fans off Electric heat must cycle on high limit control Yes No N A...

Страница 117: ... OK Yes No N A VIII Heat Recovery A Heat wheel rotates freely Yes No N A B Heat wheel VFD operates properly Yes No N A C Heat wheel VFD Model No _________________________ Serial No ___________________________ D Check for air bypass around heat wheel Yes No N A IX Design Flow Calibration A Verify power is supplied to the MicroTech III unit controller Yes No N A B Verify that the shipping screws hav...

Страница 118: ...er replacement Thank you for completing this form Please sign and date below Signature _____________________________________________________________ Startup date ___________________________ Return completed form by mail to Daikin Warranty Department 13600 Industrial Park Boulevard Minneapolis MN 55441 or by email to AAH Wty_WAR_forms daikinapplied com Please fill out the Daikin Applied Quality Ass...

Страница 119: ...pearance of the product i e paint fin damage etc Excellent Good Fair Poor 3 Did all sections of the unit fit together properly Yes No N A 4 Did the cabinet have any air leakage Yes No N A Location on unit ___________________________________________________________________________________ 5 Were there any refrigerant leaks Yes No N A From where did it occur Shipping Workmanship Design 6 Does the re...

Страница 120: ...IAQ PPM XXXXppm Occ Clg Spt 72 0 F OA Flw XXXXXCFM Occ Htg Spt 68 0 F MinOAFlw Spt 2000CFM Disch Air XXX F OA Temp XXX F Rel Humidity XXX About This Unit SO_Item 123456_12345 Unit SN FBOU123456789 App Version 2506018xxx Cf1 15 xxxxxxxxxxxxxxxx Cf6 29 xxxxxxxxxxxxxxxx Main BSP X XX LON BSP X XX LON App Ver X XX BACnet BSP X XX D Net BSP X XX HMI GUID xxxxxxxx xxxx xxxx xxxx xxxxxxxxxxxx OBH GUID xx...

Страница 121: ...et Up BACnet MSTP Set Up BACnet IP Set Up D Net Set Up Network Unit Set Up Commission Unit Unit Set Up Timer Settings SAF Set Up RF EF Set Up Htg Clg ChgOvr Set Up Cooling Set Up INV Cmp Set Up Econo Set Up Min OA Set Up Heating Set Up OA Fan Set Up Exp Valve Set Up Defrost Set Up Dehum Set Up Energy Rec Set Up D3 Set Up Alarm Configuration Service Menus Timer Settings Operating Hours Save Restore...

Страница 122: ...DRT3 XXX F SRT XXX F DFT XXX F IRT XXX F ORT XXX F Occupancy Occupancy __________ Occ Mode Auto Net OccSrc _____________ UnoccSrc ___________ Tnt Ovrde Tm 0 min SAF Speed Control SAF Speed XXX Speed Cmd XXX Duct Press X Xin DuctSP Spt 1 0in IAQ PPM XXXXPPM OA Flw XXXXXCFM MinOAFlw Spt 2000CFM Bldg Press X XXin BldgSP Spt 0 05in RF EF Control RF EF Cap XXX Speed Cmd XXX Bldg Press X XXin BldgSP Spt...

Страница 123: ...Htg OAT 0 ºF Clg Rate 0 4 ºF min Clg OAT 85 ºF Des Clg OAT 95 ºF DAYLIGHT SAVINGS DLS Strt Mon Mar DLS Strt Wk 2nd Week DLS End Mon Nov DLS End Wk 1st Week DLS Active Yes Cooling Occ Clg Spt 72 0 F Unocc Clg Spt 85 0 F DAT Clg Spt 55 0 F Economizer OAD Econo Pos XXX DAT Clg Spt 55 0 F Min OA Pos XXX Occ Clg Spt 72 0 F Unocc Clg Spt 85 0 F Min OA Damper Min OA Pos XXX Vent Limit 20 LoFlo V Lmt 30 D...

Страница 124: ... SuplHtgHiOATLk 55 0 F OAT Diff 2 0 F Htg Reset None Min Htg Spt 55 0 F Min Htg Spt 0 Max Htg Spt 120 0 F Max Htg Spt 100 Min DAT Ctrl Yes Min DAT Limit 55 0 F Occ Heating Yes Unocc Diff 55 0 F Htg Wmup Tm 60s Htg Hld Period 240s MWUSensor RAT Timer Settings Service Time 0min Start Up 180s Recirculate 180s Zero OA Time 0min Tnt Override 120min Post Heat 0s Pwd Timeout 10min Low DAT 6min ClgStateDe...

Страница 125: ...e 9 0ºF REFRIG CIRCUIT STATUS Htg EVI Meth SbC PTS XXX Xpsi IC SC Spt 9 0ºF PTD XXX Xpsi IC SC DB 2 0ºF Suction SH XX XºF HtgSC EVI Min 0 Discharge SH XX XºF Clg EVO Meth SbC Subcooling XX X F OC SC Spt 9 0ºF Eff SSH Spt XX X F OC SC DB 2 0ºF EffSH Base XX X F ClgSC EVO Min 0 Eff SC Spt XX X F ManCtrl EV Op Auto Eff SC Lo Lmt XXX SRT XXX F Disch Sat Tmp XXX X F Sucn Sat Tmp XXX X F IRT XXX F ORT X...

Страница 126: ...___ OAAdd17 32 _________ OAAdd33 49 _________ OAAdd50 64 _________ SetOAAddr XX CurrOAAddr XX CurrOAAmps XXXA CurrOARLA XXXA Sensor Offsets Disch Air 0 0ºF Return Air 0 0ºF Space Temp 0 0ºF OA Temp 0 0ºF EF LC Temp 0 0ºF ER LAT 0 0ºF ER EAT 0 0ºF DRT1 0 0ºF DRT3 0 0ºF SRT 0 0ºF DFT 0 0ºF IRT 0 0ºF ORT 0 0ºF Network Input Status Net OAT In XXX XºF Net Space In XXX XºF NetCurrState _________ NetNext...

Страница 127: ...__ MCB DI2 ____________ MCB DI3 ____________ MCB DI4 ____________ MCB DI5 ____________ MCB DI6 ____________ EMD DI1 ____________ Digital Output Status MCB DO1 __________ MCB DO2 __________ MCB DO3 __________ MCB DO4 __________ MCB DO5 __________ MCB DO6 __________ MCB DO7 __________ MCB DO8 __________ MCB DO9 __________ MCB DO10 __________ EMB DO1 __________ EMB DO2 __________ EMB DO3 __________ E...

Страница 128: ...CONTROL OPTIONS SAF Ctlr DSP RF EF Ctlr Tracking D Net Set Up ApplyD NetChgs No DHCP On Act IP 0 0 0 0 ActMsk 0 0 0 0 ActGwy xxx xxx xxx xxx Gvn IP 127 0 0 1 GvnMsk 255 255 255 0 GvnGwy 127 0 0 1 Remote Srv En Disable Comm Status ________ D net BSP X X XX BMS Communications LON Set Up BACnet MSTP Set Up BACnet IP Set Up D Net Set Up Network Unit Set Up Trending Trending Ena No Apply Chgs No Sample...

Страница 129: ...stem of units to S I MPS LPS sq M Pa C IP SI Units Select During Normal Operation Enter Move Esc Move Factory Default Current Setting Enter Move Esc Move Enter Action Move Esc Move IP SI IP SYS IP SI IP SYS IP SI SI SYS Set System Set Up Comm Set Up Ethernet Set Up Diagnostics www DaikinApplied com 129 IM 1058 8 MAVERICK II ROOFTOP SYSTEMS Appendix Keypad Display Menu Structure ...

Страница 130: ...c Move Visible only when LCD U M CFM FS1 units determined by OUT1 U M setting Displays airflow in FPM Outputs airflow in FPM In addition SW1 must be set to the VDC position to change airflow output to 0 10VDC In addition SW1 must be set to the VDC position to change airflow output to 0 5VDC In addition SW1 must be set to the mA position to change airflow output to 4 20mA Set area between 0 00 and ...

Страница 131: ...uce Temperature output Sets OUT2 to produce Alarm output In addition SW2 must be set to the VDC position to change airflow output to 0 10VDC In addition SW2 must be set to the VDC position to change airflow output to 0 5VDC In addition SW2 must be set to the mA position to change airflow output to 4 20mA 1 Factory default current setting 2 If a selection is made that requires SW1 to be set the LCD...

Страница 132: ...ant to its standard terms and conditions of sale including Limited Product Warranty Consult your local Daikin Applied representative for warranty details To find your local Daikin Applied representative go to www DaikinApplied com Aftermarket Services To find your local parts office visit www DaikinApplied com or call 800 37PARTS 800 377 2787 To find your local service office visit www DaikinAppli...

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Содержание MPS015 F

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Содержание MPS015 F

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