Daikin RDT-135c Installation And Maintenance Manual
  1. Manuals
  2. Brands
  3. Daikin Manuals
  4. Air Conditioner
  5. RDT-135c
  6. Installation and maintenance manual

Daikin RDT-135c Installation And Maintenance Manual

Roofpak series singlezone roof mounted heating and cooling units
Hide thumbs
Table of Contents

Advertisement

Quick Links

Installation and Maintenance Manual
RoofPak
Singlezone Roof Mounted
®
Heating and Cooling Units
RPS/RDT/RFS/RCS 015–135C
IM 738-2
Group: Applied Air Systems
Part Number: IM 738
Date: October 2018

Advertisement

Table of Contents
loading

Related Manuals for Daikin RDT-135c

Summary of Contents for Daikin RDT-135c

  • Page 1 IM 738-2 Installation and Maintenance Manual Group: Applied Air Systems Part Number: IM 738 Date: October 2018 RoofPak Singlezone Roof Mounted ® Heating and Cooling Units RPS/RDT/RFS/RCS 015–135C...

  • Page 2: Table Of Contents

    MicroTech II™ Remote User Interface (UI) ....92 Daikin and MicroTech II are registered trademarks of Daikin Applied Microsoft is a registered trademark of Microsoft Corporation. Windows is a trademark of Microsoft Corporation. Copyright © 2018 Daikin Applied. All rights reserved throughout the world.

  • Page 3: Introduction

    Introduction Compressor Nameplate This manual provides general information about the “C” vintage Daikin RoofPak applied rooftop unit, models RPS, On units with a single compressor on each circuit, the RDT, RFS and RCS. In addition to an overall description of compressor includes one compressor nameplate.

  • Page 4: Unit Description

    Introduction: Unit Description Unit Description Figure 2. RPS/RDT/RFS/RCS unit Typical Component Locations Figure 2 shows an RPS/RDT/RFS/RCS unit. Figure 3 shows a typical RPS unit with the locations of the major components. Figure 4 on page 3 shows a typical RDT unit with the locations of the major components.
  • Page 5 Introduction: Unit Description Figure 4. Component locations—RDT units Bottom supply air opening 1.50 MPT drain Top View Power entrances 3" dia K.O. Optional outside & Control entrances 7/8" dia K.O. return air dampers Bottom return opening Side View DX coil section Filter section Supply fan section Return air plenum...

  • Page 6: Condenser Fan Arrangement

    Introduction: Condenser Fan Arrangement Condenser Fan Arrangement Table 2 below shows the condenser fan numbering conventions and locations for each unit size. Table 2: Condenser fan arrangement Unit size Refrigerant circuit Arrangement Unit size Refrigerant circuit Arrangement COND 015C 075C 018C 080C 1 or 2...

  • Page 7: Refrigeration Piping

    Introduction: Refrigeration Piping Refrigeration Piping This section presents the unit refrigeration piping diagrams for the various available configurations. Figure 5. Circuit schematic A Compressor (1, 2, or 3 per circuit)† B Discharge line † C Condenser coil † D Evaporator coil* E Manual shutoff valve†...
  • Page 8 Introduction: Refrigeration Piping Figure 7. Condenser piping, four reciprocating compressors (115 to 135C) Legend 1 - Discharge Line Service Valve 2 - Discharge Muffler 3 - High Pressure Relief Valve 4 - Liquid Line Manual Shut-off Valve 5 - Suction Line Service Valve IM 738-2...
  • Page 9 Introduction: Refrigeration Piping Figure 8. Air handler piping (flat DX) Legend 1 - Filter-drier 2 - Liquid line solenoid valve 3 - Sightglass 4 - Hot gas bypass and solenoid valve (optional) 5 - Thermostatic expansion valve 6 - Distributor Figure 9.

  • Page 10: Control Locations

    Introduction: Control Locations Control Locations Figure 10 (RPS Units) and Figure 11 on page 9 (RDT Units) Additional information is included in Table 3 on page 18 and show the locations of the various control components mounted the wiring diagram legend, which is included in “Wiring throughout the units.
  • Page 11 Introduction: Control Locations Figure 11. Control locations—RDT units SC11, 21 (optional) Condenser section C11, 21 (optional) Supply fan discharge plenum section Heat section section Filter section Economizer return air HP1-2, LP1-2 HTR1-2, U1/U2 HP3-4 (optional) HTR3-4 (optional) SV1, 2 SV5, 6 (optional) LT10 (optional) C19, 20 (optional)

  • Page 12: Control Panel

    Introduction: Control Panel Control Panel The unit control panels and their locations are shown in the from these figures depending on the particular unit options. following figures. These figures show a typical unit See “Wiring Diagrams” on page 62 for the legend and configuration.
  • Page 13 Introduction: Control Panel Figure 13. Typical main control panel, 015 to 040, 460 volt See separate detail, page 17. IM 738-2...
  • Page 14 Introduction: Control Panel Figure 14. Typical main control panel, 045 to 075, 460 volt See separate detail, page 17. IM 738-2...
  • Page 15 Introduction: Control Panel Figure 15. Typical main control panel, 080 to 135, 460 volt IM 738-2...
  • Page 16 Introduction: Control Panel Figure 16. Typical gas heat panel, 1000 MBH Figure 18. VFD bypass panel, 40 HP, 460 volt) TD10 TB11 FSG Time Figure 17. Typical propeller exhaust panel, three fans, 460 volt AFD20 GND IM 738-2...
  • Page 17 Introduction: Control Panel Figure 19. RCS control panel with MicroTech II, 015 to 040C Figure 20. RCS control panel with MicroTech II, RPS 045 to 075C Figure 21. RCS control panel with MicroTech II, RPS 080 to 135C IM 738-2...
  • Page 18 Introduction: Control Panel Figure 22. Electric heat panel, sizes 15 to 40C Figure 24. Electric heat panel, sizes 80 to 135 FB33 FB32 FB31 FB33 FB32 FB31 FB44 FB34 FB43 FB42 FB41 FB43 FB42 FB41 TB11 TB11 Figure 23. Electric heat panel, sizes 45 to 75C GLG3 FB33 FB32...
  • Page 19 Introduction: Control Panel Figure 25. Harness plug connector detail RATS DATS OATS EPTS OPEN1 AFD10 AFD20 SV12 SV56 ACT3 OPEN2 HL22 OPEN3 GSHT1 GSHT2 DFRH DFLH OPEN4 COMP1 COMP2 COMP3 COMP4 COMP5 COMP6 LT10 LT11 LT OP1 LT OP2 IM 738-2...

  • Page 20: Controls, Settings, And Functions

    Introduction: Controls, Settings, and Functions Controls, Settings, and Functions Table 3 below lists all of the unit control devices. Included in setting, any setting ranges, differentials, and the device part the table are the device symbol, a description of the device, its number.
  • Page 21 Introduction: Controls, Settings, and Functions Table 3: Controls, settings, and functions (continued) Symbol Description Function Reset Location Setting Range Differential Part no. Airflow proving Senses supply fan pressure to Auto Supply fan .10" w.c. (25 Pa) .05-5" w.c. .05" w.c. 060015801 switch prove airflow...
  • Page 22 Introduction: Controls, Settings, and Functions FanTrol The FanTrol, provided on all units, is a method of head RPS/RDT and RCS units have two independent refrigerant pressure control that automatically cycles the condenser fans circuits with one to four condenser fans being controlled in response to ambient air temperature.

  • Page 23: Mechanical Installation

    Allow service clearance approximately as indicated in Figure 26. Also, Daikin recommends providing a roof walkway to trained personnel. the rooftop unit as well as along at least the two sides of the unit that provide access to most controls and serviceable components.

  • Page 24: Ventilation Clearance

    Mechanical Installation: Ventilation Clearance Ventilation Clearance Below are minimum ventilation clearance recommendations. Do not locate outside air intakes near exhaust vents or other The system designer must consider each application and sources of contaminated air. provide adequate ventilation. If this is not done, the unit will If the unit is installed where windy conditions are common, not perform properly.

  • Page 25: Roof Curb Assembly And Installation

    Mechanical Installation: Roof Curb Assembly and Installation Roof Curb Assembly and Installation Locate the roof curb and unit on a portion of the roof that can If applicable, set other curbing parts (D, L, M, etc.) in place support the weight of the unit. The unit must be supported to making sure that the orientation complies with the prevent bending or twisting of the machine.
  • Page 26 Mechanical Installation: Roof Curb Assembly and Installation Figure 29. RPS/RFS roof curb assembly Using remaining side supports in this area, align lengths on Condenser opposite sides of assembly Section Support and install a cross support “D” at each side. 1.5" 6.8"...
  • Page 27 Mechanical Installation: Roof Curb Assembly and Installation Figure 30. Typical power wire entrance, curb view (RPS/RFS 015C to 040C shown, see project certified drawings) 20.0 RPS only 97.0 76.0 OPNG OPNG See Detail A 2 Typ 4 Typ Unit length minus 6.4 Detail A 12.1 0.9 Dia.

  • Page 28: Post And Rail Mounting

    Mechanical Installation: Post and Rail Mounting Post and Rail Mounting When mounting by post and rail, run the structural support the Provide proper drainage around the unit to prevent flooding full length of the unit. Locate the structural member at the base of the equipment.
  • Page 29 Mechanical Installation: Rigging and Handling Lifting Points To determine the required lifting cable lengths and whether Where: four-or six-point lifting is required, use Tables 8 and 9 and Z = Total unit length in inches Figures 33 and 34. (refer to certified drawings for this dimension). Referring to Figure 33 and Figure 34, note that dimension A is X = Outdoor/return air section length (refer to Table 8for this the distance between the outer lifting points.
  • Page 30 Mechanical Installation: Rigging and Handling Figure 34. Unit type RFS or RPS/RDT factory split at Figure 35. Unit type RCS condenser Figure 36. Unit type RCS or condenser section from RPS/ RDT factory split at condenser 0 4 5 C – 0 6 0 C : B ( mi n .) = 5 7 " ( 1 4 4 8 m m ) 0 7 0 C –...

  • Page 31: Reassembly Of Split Units

    Mechanical Installation: Reassembly of Split Units Figure 37. RPS factory split at supply fan section Reassembly of Split Units Although RoofPak units typically ship from the factory as complete units, they may be split at the factory in one of three possible configurations.
  • Page 32 Mechanical Installation: RPS Factory Split at Fan RPS Factory Split at Fan Field reassembly of an RPS/RDT unit that has shipped split at Remove screws on fan panel, leaving retainer clips in place the fan takes place in three phases: (1) setting the sections to secure bulkhead.
  • Page 33 Mechanical Installation: RPS Factory Split at Fan Phase II. Reassemble cabinet (Figure 39) Reinstall top cap removed in Phase I, Step 1. Install #10 screws (provided). Caulk (watertight) ends of splice cap. Install screws (.25–20 × .75) removed in Phase I, Step Caulk (watertight) vertical seam.
  • Page 34 Mechanical Installation: RPS Factory Split at Fan Phase III. Reconnect power and control wiring The DX coil/condenser section contains power and control Run the control harnesses by removing the external harnesses that have their excess length in the blank or heat raceway covers on either side of the unit split.
  • Page 35 Mechanical Installation: RPS/RDT Factory Split at Condensing Unit RPS/RDT Factory Split at Condensing Unit Field reassembly of an RPS/RDT unit that has shipped split at interference and damage as the sections are set together. the condenser takes place in three phases: (1) setting the See Figure 42.
  • Page 36 Mechanical Installation: RPS/RDT Factory Split at Condensing Unit Install condenser support on air handler unit as shown in Lower the condenser unit until nearly level with main unit. Figure 43. Fill unused holes in unit base with bolts saved See Figure 44. intep 6.
  • Page 37 Mechanical Installation: RPS/RDT Factory Split at Condensing Unit After condenser unit is set in place, install the top cap saved Install 1/2" bolt removed in Step 5. See Figure 45. in Step 1. See Figure 45. Install splice cover (provided), see Figure 45. Caulk (watertight) ends of splice cap and vertical seam.
  • Page 38 Mechanical Installation: RPS/RDT Factory Split at Condensing Unit Phase II. Reconnect refrigerant piping All refrigerant piping required to reconnect the two sections is Perform pressure testing as described in the “Leak Testing” provided so when the piping closures are cut off, piping from section on page 39.
  • Page 39 Mechanical Installation: RPS/RDT Factory Split at Condensing Unit Figure 48. RPS/RDT (split)/RFS/RCS 045 to 135 refrigerant piping connections Note: RFS units with front discharge do NOT include refrigerant piping to the DX coil. Field piping is required. Table 11: Connection sizes and locations, Figure 48 Connection sizes Connection locations RPS (split) and...
  • Page 40 Mechanical Installation: RPS/RDT Factory Split at Condensing Unit Phase III. Reconnecting power and control wiring Figure 50. Remove vertical raceway The wire harnesses are coiled in the condenser section base rail (see Figure 49). The power wires into the lower base rail raceway and the control wires into the upper raceway.
  • Page 41 Mechanical Installation: RFS/RCS Permanent Split Systems RFS/RCS Permanent Split Systems and reported to the Daikin sales representative and freight Piping Recommendations carrier if the loss is due to shipping damage. Use type K or L clean copper tubing. Thoroughly clean or braze all joints with high temperature solder.
  • Page 42 Mechanical Installation: RFS/RCS Permanent Split Systems Evacuate the system again to 29" (740 mm) of vacuum. CAUTION Repeat his procedure three times. This method is most Before replacing refrigerant sensors or protective devices, see effective by holding system pressure at 0 pounds “Refrigerant Charge”...
  • Page 43 Mechanical Installation: RFS/RCS Permanent Split Systems Table 15: Approximate 407C refrigerant charge per circuit, 015C to 040C Base charge Additional charge for heat section Condenser pumpdown Evaporator coil lbs per circuit (less DX coil) additional length Unit size capacity* (lbs/CKT/coil row) (lbs) Circuit 1 Circuit 2...
  • Page 44 Mechanical Installation: RFS/RCS Permanent Split Systems Table 18: Pressure-vacuum equivalents Absolute pressure above zero Vacuum below 1 atmosphere Approximate Boiling point fraction of of H2O at each Microns PSIA Mercury (mm) Mercury (in.) 1 atmosphere pressure ( 760.00 29.921 — —...
  • Page 45 Mechanical Installation: RFS/RCS Permanent Split Systems such that only liquid leaves the tank but vapor enters the Subcooling compressor. When field charging the unit, use the following to properly charge the unit: This is especially true with R-407C because the charge must be drawn from the liquid portion of the tank.

  • Page 46: Unit Piping

    Mechanical Installation: Unit Piping Unit Piping Figure 51. Condensate drain connection Condensate Drain Connection The unit is provided with a 1.5" male NPT condensate drain connection. Refer to certified drawings for the exact location. For proper drainage, level the unit and drain pan side to side and install a P-trap RPS units may have positive or negative pressure sections.

  • Page 47: Steam Coil Piping

    Follow instructions for mixing antifreeze solution used. Some products have higher freezing points in their natural state than when mixed with water. The freezing of coils is not the responsibility of Daikin Applied. Refer to “Winterizing Water Coils” on page 117. IM 738-2...
  • Page 48 Mechanical Installation: Steam Coil Piping Steam Piping Recommendations Steam Coil Freeze Conditions Be certain that adequate piping flexibility is provided. If the air entering the steam coil is below 35°F (2°C), note the Stresses resulting from expansion of closely coupled piping following recommendations: and coil arrangement can cause serious damage.

  • Page 49: Damper Assemblies

    Mechanical Installation: Damper Assemblies Damper Assemblies Figure 57. Damper adjustment The optional damper assemblies described in this section normally are ordered with factory-installed actuators and linkages. The following sections describe operation and linkage adjustment of the factory option. Economizer Dampers Outside air intake is provided on both sides of the unit, and the return air path is at the center of the damper set.
  • Page 50 Mechanical Installation: Damper Assemblies Intake Hood Damper (0% to 100% outside air) Figure 59. Intake hood damper adjustment Units requiring 100% outside air are provided with a rain hood and dampers that can be controlled by a single actuator. The actuator provides two-position control for opening the dampers fully during unit operation and closing the dampers during the off cycle.

  • Page 51: Cabinet Weather Protection

    Ductwork exposed to outdoor conditions must be built in Installing Ductwork accordance with ASHRAE and SMACNA recommendations On bottom-supply/bottom-return units, if a Daikin roof curb is and local building codes not used, installing contractor should make an airtight NOTICE connection by attaching field fabricated duct collars to the bottom surface of either the roof curb’s duct flange or the...

  • Page 52: Installing Duct Static Pressure Sensor Taps

    Use different colored tubing for the duct pressure (HI) and reference pressure (LO) taps, or tag the tubes. Daikin recommends ¼" plastic tubing. Locate the duct pressure (HI) tap near the end of a long duct to ensure that all terminal box take-offs along the run have adequate static pressure.

  • Page 53: Installing Building Static Pressure Sensor Taps

    Mechanical Installation: Installing Building Static Pressure Sensor Taps Installing Building Static Pressure Sensor Taps Lab Pressurization Applications If a unit has direct building static pressure control capability, you must field install and connect static pressure taps to Install a “T” fitting with a leak-tight removable cap in each pressure sensor SPS2 in the unit.

  • Page 54: Electrical Installation

    Electrical Installation: Field Power Wiring Electrical Installation Field Power Wiring Figure 63. RPS/RDT and RFSpower wiring connections Wiring must comply with all applicable codes and ordinances or in the absence of local codes, with the National Electrical Code ANSI/NFPA 70 and/or Canadian Electrical Code CSA Electric heat C22.1.
  • Page 55 Electrical Installation: Field Power Wiring Figure 65. Typical power wire entrance, unit view—RPS 015C to 040Cshown (actual opening shown on submittal documents) 20.0 Supply air opening 10.0 10.0 1.50 MPT drain 76.0 94.0 86.5 12.0 Bottom return opening Varies based on options Detail B 3.0 Dia.
  • Page 56 Electrical Installation: Field Power Wiring In compliance with the National Electrical Code, an Table 21: Multiple point power connection options electrically isolated 115V circuit is provided in the unit to supply the factory mounted service receptacle outlet and Number of Location Disconnect electrical...

  • Page 57: Field Control Wiring

    Electrical Installation: Field Control Wiring Field Control Wiring Figure 68. RDT, RFS, RPS field control wiring connections Roof Pak applied rooftop units are available with several control arrangements which may require low voltage field wiring. Detailed descriptions of various field control wiring options and requirements are included in the “Field Wiring”...

  • Page 58: Preparing Unit For Operation

    Preparing Unit for Operation: Spring Isolated Fans Preparing Unit for Operation Figure 72. Fan spring mount adjustment WARNING Leveling screw Moving machinery hazard. Can cause severe injury or death. Jam nut Before servicing equipment, disconnect power and lock off. Spring Fan base More than one disconnect may be required to de-energize unit.

  • Page 59: Adjusting Scroll Dampers

    Preparing Unit for Operation: Adjusting Scroll Dampers Adjusting Scroll Dampers Adjusting Supply Fan Thrust Restraints Two sets of scroll dampers are provided in the housing of the Thrust restraints are provided when housed double-width fans twin 15" x 6" supply fan to allow control of air volume to each are mounted on springs.

  • Page 60: Sequences Of Operation

    Sequences of Operation: Power-up Sequences of Operation The following sequences of operation are for a typical “C” When the field supplied Cool Enable switch is in the OFF vintage applied rooftop unit equipped with MicroTech II, an position, field wiring terminal TB2 105 de-energizes (line economizer, 4 compressor/4 stage cooling, 3 to 1 turn down 220).

  • Page 61: Economizer Operation

    Sequences of Operation: Economizer Operation Economizer Operation Compressor control switches, CS1 and 2 provide 24 VAC from transformer T9 to compressor control boards CCB1 and CCB2 When the outdoor air is suitable for free cooling, the switch in (lines 805, 838) as well as the following cooling circuit binary enthalpy sensor OAE is in position “3”...

  • Page 62: Heating

    Sequences of Operation: Heating setpoints input through the keypad. CCB2-BO6 controls 24-hour period (between 2:00 a.m. and 2:00 a.m.). After the contactor M22 (line 866), which cycles condenser fan 22. third trip, the alarm remains until manually cleared at the CCB2-BO7 controls contactor M23 (line 867), which cycles keypad or over the network.
  • Page 63 Sequences of Operation: Heating and keeps the supply fan running until the furnace cools down (this might happen during night setback operation). If the furnace overheats, the FLC high limit control (line 603) cycles the burner, preventing the furnace temperature from exceeding the limit control’s setpoint.

  • Page 64: Wiring Diagrams

    Wiring Diagrams: Legend Wiring Diagrams Legend Description Standard location Exhaust air temperature Energy recovery section Description Standard location sensor Entering fan air temperature Supply fan section ACT3, 4 Actuator motor, economizer Economizer section sensor ACT5 Actuator motor, discharge Discharge section EHB1 Staged electric heat board Main control box...
  • Page 65 Wiring Diagrams: Legend Description Standard location Description Standard location HTR1–6 Crankcase heaters On compressers Power block, power Electric heat box distribution, electric heat HTR65 Heater, sump Evap. condenser section Power block, power Condenser control box HTR66 Heater, vestibule Evap. condenser vestibule distribution, condenser HUM1 Humidstat sensor...
  • Page 66 Wiring Diagrams: Legend Description Standard location Description Standard location Return air enthalpy sensor Return section TC56 Temperature control, water Evap. condenser vestibule pipe heater Return air temperature sensor Return section TC66 Temperature control, vestibule Evap. condenser vestibule REC1 Receptacle, main box Main control box exhaust fan REC2...
  • Page 67 Wiring Diagrams Figure 75. VAV fan power (with SAF and RAF VFDs and manual bypass) IM 738-2...
  • Page 68 Wiring Diagrams Figure 75. VAV fan power (with SAF and RAF VFDs and manual bypass), continued IM 738-2...
  • Page 69 Wiring Diagrams Figure 76. Constant volume fan power (SAF and RAF) IM 738-2...
  • Page 70 Wiring Diagrams Figure 76. Constant volume fan power (SAF and RAF), continued IM 738-2...
  • Page 71 Wiring Diagrams Figure 77. RPS 75 condensing unit power (with SpeedTrol and scroll compressors) IM 738-2...
  • Page 72 Wiring Diagrams Figure 77. RPS 75 condensing unit power (with SpeedTrol and scroll compressors, continued IM 738-2...
  • Page 73 Wiring Diagrams Figure 78. VAV control inputs IM 738-2...
  • Page 74 Wiring Diagrams Figure 78. VAV Control Inputs, continued IM 738-2...
  • Page 75 Wiring Diagrams Figure 79. CV control inputs IM 738-2...
  • Page 76 Wiring Diagrams Figure 79. CV control inputs, continued IM 738-2...
  • Page 77 Wiring Diagrams Figure 80. Control actuator outputs (CV, stream, or hot water, plus economizer) IM 738-2...
  • Page 78 Wiring Diagrams Figure 80. Control actuator outputs (CV, stream, or hot water, plus economizer), continued H343-9 IM 738-2...
  • Page 79 Wiring Diagrams Figure 81. VFD control (SAF and RAF) IM 738-2...
  • Page 80 Wiring Diagrams Figure 81. VFD control (SAF and RAF), continued IM 738-2...
  • Page 81 Wiring Diagrams Figure 82. Super Mod gas furnace control (1000 MBH) IM 738-2...
  • Page 82 Wiring Diagrams Figure 82. Super Mod gas furnace control (1000 MBH), continued IM 738-2...
  • Page 83 Wiring Diagrams Figure 83. Standard Mod, furnace control (1000 MBH) IM 738-2...
  • Page 84 Wiring Diagrams Figure 83. Standard Mod, furnace control (1000 MBH), continued IM 738-2...
  • Page 85 Wiring Diagrams Figure 84. RPS 60 condensing unit control (with scroll compressors) IM 738-2...
  • Page 86 Wiring Diagrams Figure 84. RPS 60 condensing unit control (with scroll compressors), continued IM 738-2...
  • Page 87 Wiring Diagrams Figure 85. RPS 135 condensing unit control (with reciprocating compressors) IM 738-2...
  • Page 88 Wiring Diagrams Figure 85. RPS 135 condensing unit control (with reciprocating compressors), continued IM 738-2...
  • Page 89 Wiring Diagrams Figure 86. CV fan control (SAF and RAF) /3.11 /3.11 /1.68 115VAC_GF/1 T3_24V T3_COM T1_N jprs 24V SRC 401A SUPPLY FAN SOURCE 9-16 WIRED INTERNAL jprs TO MOTHERBOARD 24V SRC 404A 9-16 RETURN FAN /3.11 /3.11 /1.68 115VAC_GF/1 T3_24V T3_COM T1_N...

  • Page 90: Unit Options

    Unit Options: Enthalpy Control Unit Options Enthalpy Control Figure 88. Enthalpy control settings Outside Air Enthalpy Control (OAE) Units with MicroTech II control and an economizer come standard with an electromechanical enthalpy control device (OAE) that senses both the humidity and temperature of the outside air entering the unit.

  • Page 91: Hot Gas Bypass

    Unit Options: Hot Gas Bypass Hot Gas Bypass Hot gas bypass is a system for maintaining evaporator pressure The regulating valve opening point can be determined by at or above a minimum value. The purpose for regulating the slowly reducing the system load or reducing the required hot gas into the distributor is to keep the velocity of the discharge air temperature setting while observing the suction refrigerant as it passes through the evaporator high enough for...

  • Page 92: Speedtrol™ (N/A Unit Sizes 015C To 030C)

    Unit Options: SpeedTrol™ (N/A Unit Sizes 015C to 030C) SpeedTrol™ (N/A Unit Sizes 015C to 030C) Smoke and Fire Protection Daikin optionally offers factory installed outdoor air, return McQuay’s SpeedTrol system of head pressure control operates in conjunction with FanTrol by modulating the motor speed of...

  • Page 93: Freeze Protection

    Unit Options: Freeze Protection Freeze Protection Entering Fan Temperature Sensor An optional freezestat is available on units with MicroTech II The entering fan temperature (EFT) sensor and an associated control that have hot water, chilled water, or steam heating “Lo Airflow Problem” alarm are provided on VAV units with coils.

  • Page 94: Microtech Ii™ Remote User Interface (Ui)

    Unit Options: MicroTech II™ Remote User Interface (UI) MicroTech II™ Remote User Interface (UI) • No more than 1200 feet of wiring can be used to connect the remote user interface to the unit. • Use overall foil shield, 3 twisted pairs, 22 AWG stranded connectors with drain wire.

  • Page 95: Variable Frequency Drive Operation

    Unit Options: Variable Frequency Drive Operation Variable Frequency Drive Operation Refer to the vendor instructions supplied with the unit. Examine the station for shipping damage. Manually rotate the vane and verify that it does not rub against anything. Convenience Receptacle/Section Lights Figure 93.
  • Page 96 Unit Options: DesignFlow™ Outdoor Air Damper Option Figure 94. Tape fulcrum alignment plate to vane Figure 95. Place leveling weight on fulcrum Vane Duct tape This edge flush with this side of vane These edges flush with bottom of vane Fulcrum alignment plate Fulcrum Duct tape...
  • Page 97 Unit Options: DesignFlow™ Outdoor Air Damper Option Making Level Adjustments When finished making the adjustments, tighten the .25-20 NC lock nut in the slotted hole at the bottom of the The DesignFlow unit is mounted so that it pivots at the top DesignFlow frame.

  • Page 98: Propeller Exhaust Fan Option

    Unit Options: Propeller Exhaust Fan Option Propeller Exhaust Fan Option Economizer units may include propeller exhaust or centrifugal Figure 100. Fan rotation return fan options. This section covers maintenance and operating instructions for the propeller exhaust option. Centrifugal return fan construction, maintenance and operation is similar to that for supply fans and covered in other sections of this manual.
  • Page 99 Unit Options: Propeller Exhaust Fan Option Figure 101. Belt adjustment Figure 102. Drive pulley alignment Table 24: Propeller exhaust fan troubleshooting Problem Cause Corrective Action System resistance is too Check backdraft dampers for proper operation. Remove obstructions in ductwork. Clean dirty filters. high.

  • Page 100: Exhaust Fan On/Off Control

    Unit Options: Exhaust Fan On/Off Control Bearings Ultraviolet Lights Option Bearings are the most critical moving part of the fan; inspect When this option is employed, ultraviolet C light bathes the them at periodic intervals. Check locking collars, set screws, moist surfaces on the coil and drain pan, killing most and fasteners that attach bearings to the bearing plate for microorganisms that can grow there.

  • Page 101: Ultraviolet Light Operation

    Unit Options: Ultraviolet Light Operation Ultraviolet Light Operation Refer to the wiring schematic below. 115 VAC power for the The normally open disconnect switches are wired in series in a UV lights is provided by control circuit transformer T1. The circuit that supplies 24VAC to the coil of relay R45.

  • Page 102: Check, Test, And Start Procedures

    To obtain full warranty coverage, complete and Verify that all construction debris is removed, and that the sign the check, test, and start form supplied with the unit and return it to Daikin Applied. filters are clean. Verify that all electrical work is complete and properly WARNING terminated.

  • Page 103: Power Up

    Check, Test, and Start Procedures: Power Up If the DAC or SCC unit does not have an optional zone Economizer Start-up temperature sensor (ZNT1) connected to it, you may need CAUTION to change the keypad entry under Setup/Service \ Unit Configuration \ Space Sensor= from YES to NO.

  • Page 104: Compressor Startup

    Check, Test, and Start Procedures: Compressor Startup Compressor Startup With the supply and return fans operational, prepare for Perform the following procedure on all units: compressor operation. At the keypad, set the cooling setpoint low enough so that the controller will call for cooling. The value in CAUTION Temperature \ Zone Cooling \ Occ Clg Spt= will need to be adjusted below the temperature shown in Temperature \...

  • Page 105: Oil Pressure (Sizes 115 To 135C Only)

    Check, Test, and Start Procedures: Oil Pressure (sizes 115 to 135C only) 115 to 135C only)” on page 103. If the compressor cycles Verify that the condenser refrigerant subcooling at full on its low pressure switch, do the following: capacity is between 13 and 20°F. Verify that the circuit is not short of refrigerant.

  • Page 106: Heating System Startup

    Check, Test, and Start Procedures: Heating System Startup If low oil level is accompanied by heavy foaming Hot Water Heat Note: visible in the oil sightglass, it is possible that excess The hot water valve actuator should open the valve to the coil. liquid refrigerant is returning to the compressor The three-way hot water valve is open to the coil when the depending on the rotation of the crank shaft.

  • Page 107: Sheave Alignment

    Check, Test, and Start Procedures: Sheave Alignment Sheave Alignment Drive Belt Adjustment Mounting: General Rules of Tensioning Verify both driving and driven sheaves are in alignment and The ideal tension is the lowest tension at which the belt will the shafts are parallel. The center line of the driving sheave not slip under peak load conditions.

  • Page 108: Mounting And Adjusting Motor Sheaves

    Check, Test, and Start Procedures: Mounting and Adjusting Motor Sheaves Mounting and Adjusting Motor Sheaves Be sure that all keys are in place and that all setscrews are tight before starting the drive. Check the setscrews and belt Figure 109. VM and VP variable pitch sheaves tension after 24 hours of service.
  • Page 109 Check, Test, and Start Procedures: Mounting and Adjusting Motor Sheaves MVP Variable Pitch Sheaves Adjust the sheave to the desired pitch diameter by turning the outer locking ring with a spanner wrench. Any pitch Adjusting: diameter can be obtained within the sheave range. One Slack off belt tension by moving the motor toward the complete turn of the outer locking ring will result in a driven shaft until the belts are free from the grooves.
  • Page 110 Check, Test, and Start Procedures: Mounting and Adjusting Motor Sheaves Figure 112. MVP variable pitch sheaves (type A–B) IM 738-2...

  • Page 111: Final Control Settings

    Temperature \ Discharge Cooling \ Maintaining Control Parameter Records Temperature \ Discharge Heating \ Daikin recommends that the MicroTech II controller’s Set the low ambient compressor lockout setpoint as setpoints and parameters be recorded and saved for future required in menu, Temperature \ Zone Cooling \ OAT Clg reference.

  • Page 112: Keypad Accessible Menu Structure

    Final Control Settings: Keypad accessible menu structure Figure 113. Keypad accessible menu structure Keypad accessible menu structure IM 738-2...
  • Page 113 Final Control Settings: Keypad accessible menu structure Figure 113. Keypad accessible menu structure (continued) IM 738-2...
  • Page 114 Final Control Settings: Keypad accessible menu structure Figure 113. Keypad accessible menu structure (continued) IM 738-2...

  • Page 115: Maintenance

    Before servicing, always inspect Location units for multiple disconnects to ensure all power is removed The Daikin Rooftop Packaged System Unit is an outdoor unit. from the control panel and its components. However, the schedule may dictate storage either on the WARNING ground or in its final position at the site.

  • Page 116: Gas Furnace

    If special lubrication instructions Control Compartment are on the motor, they supersede all other instructions. Daikin Applied recommends that the electronic control equipment in the unit be stored in a 5% to 95% RH Condenser fan—Condenser fan motors are permanently lubricated and require no periodic lubrication.

  • Page 117: Setscrews

    Maintenance: Setscrews Fan Shaft Bearings Bad V-belts; lumpy, or mismatched; belt tension too tight or too loose. Relubricate fan shaft bearings periodically. Relubricate according to the schedule shown in Table 26. If the bearings Bad bearings, loose bearing hold-down bolts. are exposed to wet conditions, wide temperature variations, or Motor imbalance.

  • Page 118: Supply Fan Wheel-To-Funnel Alignment

    Maintenance: Supply Fan Wheel-to-Funnel Alignment Figure 114. Return fan assembly Figure 116. 24" DWDI backward curved wheel-to-funnel (036C, 040C) Figure 117. 27 to 40" DWDI airfoil wheel-to-funnel alignment Supply Fan Wheel-to-Funnel Alignment If the unit is equipped with an airfoil or backward curved supply fan, the fan wheel-to-funnel alignment must be as shown in Figure 115, Figure 116, Figure 118 and Figure 119 to Table 29: 27 to 40"...

  • Page 119: Refrigerant Leaks

    Servicing Refrigerant Sensors or Switches concentrated enough to prevent freeze-up. The Daikin Rooftop unit includes the following refrigerant Note: Carefully read instructions for mixing antifreeze solution used. Some products have a higher freezing sensors or switches.

  • Page 120: Control Panel Components

    Maintenance: Control Panel Components Control Panel Components Manual Motor Protector (MMP) Figure 120. Manual motor protector The manual motor protector (MMP) provides coordinated branch circuit, short circuit protection, a disconnecting means, Arrow a motor controller, and coordinated motor overload protection. A short circuit indicator with manual reset is mounted along side of each MMP as a means to differentiate between a short Three-position...
  • Page 121 Maintenance: Control Panel Components Disconnect Terminals The optional disconnect is a molded case switch with many of The terminals are spring clamp type. They only require the same features of the circuit breaker. The disconnect comes inserting (see in Figure 123) and clamping the wire to be standard with a through-the-door handle and mechanism to stripped, which offers several advantages over screw disconnect power to the unit prior to opening the door.
  • Page 122 Maintenance: Control Panel Components Phase Voltage Monitor (PVM) (see page 88) The phase voltage monitor is designed to protect three-phase Figure 124. Phase voltage monitor loads from damaging power conditions. A microprocessor- based voltage and phase sensing circuit constantly monitors Standard the three-phase voltages to detect harmful power line 1–500 second...

  • Page 123: Replacement Parts List

    Replacement Parts List Replacement Parts List Component Daikin part number Description designation Main Control Board 060006101 112026101 (replaces 106102701) CCB1 Auxiliary Cooling Control Board (DX Circuit #1 or generic condenser) 112026101 (replaces 106102701) CCB2 Auxiliary Cooling Control Board (DX Circuit #2)

  • Page 124: Service And Warranty Procedure

    The warranty period extends 12 months from startup or 18 months from date of shipment, whichever comes All Daikin Rooftop products include a first year parts only first. Labor to install these parts is not included with this warranty. The warranty period extends 12 months from start- warranty.

  • Page 125: All Compressors

    Contact the Daikin Parts Department for compressor be entered through your nearest Daikin representative. The availability. order should include the component's part number and Send a completed parts order form to the Daikin Parts description and the model and serial numbers of the unit Department. involved.

  • Page 126: Limited Product Warranty (North America)

    Company, including products sold under the brand names Daikin Air Conditioning, AAF Air Conditioning, AAF Sole Remedy HermanNelson and Daikin Service, and used in the United States or Canada, proves defective in material or workmanship THIS WARRANTY CONSTITUTES THE OWNER’S SOLE within twelve (12) months from initial startup or eighteen (18) REMEDY.

  • Page 127: Rooftop Equipment Warranty Registration Form

    Rooftop Equipment Warranty Registration Form Rooftop Equipment Warranty Registration Form To comply with the terms of Daikin Warranty, complete and return this form within 10 days to Daikin, Warranty Department Check, test, and start procedure for RoofPak roof mounted air conditioners with or without heat recovery and roof mounted air handlers.
  • Page 128 Rooftop Equipment Warranty Registration Form Warranty Registration Form (continued) E. Ambient temperature ______________________ °F F. Oil safety control time delay (sizes 115 to 135C only): Compressor #1 ________sec. Compressor #3________ sec. Compressor #2sec. Compressor #4_________sec. G. Compressor lockout timers function? ............. . . Yes H.
  • Page 129 Startup date: ___________________________________ RETURN COMPLETED FORM TO: Daikin Applied Warranty Department, 13600 Industrial Park Boulevard, Minneapolis, MN 55441 Please list any additional comments that could affect the operation of this unit; e.g., shipping damage, failed components, adverse installation applications, etc., on a separate sheet and attach to this form.

  • Page 130: Quality Assurance Survey Report

    Poor 10. How would you rate the overall quality of the product? Excellent Good Fair Poor 11. How does the quality of Daikin products rank in relation to competitive products? Excellent Good Fair Poor Comments: Please list any additional comments which could affect the operation of this unit; i.e., shipping damage, failed components, adverse installation applications, etc., on a separate sheet and attach to this form.
  • Page 131 IM 738-2...
  • Page 132 Daikin Training and Development Now that you have made an investment in modern, efficient Daikin equipment, its care should be a high priority. For training information on all Daikin HVAC products, please visit us at www.DaikinApplied.com and click on training, or call 540-248-9646 and ask for the Training Department.

This manual is also suitable for:

Rfs-135cRps-135cRdt-040cRfs-040cRcs-040cRps-045c ... Show all

Table of Contents