Installation & Maintenance Data IM 1049-4 Group: WSHP Part Number: 910138569 Date: October 2012 Daikin McQuay® Enfinity™ Horizontal Water Source Heat Pumps R-410A Refrigerant Model CCH, CCW Unit Sizes 007 – 070 ©2012 McQuay International • 800.432.1342 • www.daikinmcquay.
Contents Nomenclature.......................................................................2 MicroTech III Controller With LonWorks® Communication Module.................................................................................16 MicroTech III Controller with BACnet Communication Module...................................................16 Changing PSC Fan Motor Speed ...................................19 Unit Size 007 through 012 (115-60-1), (208/230-60-1) and (265-60-1)............................
Receiving and Storage CAUTION Sharp edges can cause personal injury. Avoid contact with them. Use care and wear protective clothing, safety glasses and gloves when handling parts and servicing heat pumps. Upon receipt of the equipment, check carton for visible damage. Make a notation on the shipper’s delivery ticket before signing. If there is any evidence of rough handling, immediately open the cartons to check for concealed damage.
Unit Location Filter Access 1. Locate the unit in an area that allows for easy removal of the filter and access panels. Leave a minimum of 18" of clearance around the heat pump for easy removal of the entire unit (if necessary), and to perform routine maintenance, or troubleshooting. Provide sufficient room to make water, electrical and duct connections. 2.
Air Discharge Conversion Unit sizes 007 thru 060 are stocked as straight discharge. A straight discharge unit may be converted to an end discharge by doing the following: Note: The information covered in this section of the blower assembly orientation is typical of Daikin McQuay units. Regardless, if you are changing end to straight or straight to end the blower assembly has to turn 90 degrees and simultaneously rotate 180 degrees to achieve the proper orientation.
. Lift the fan assembly out rotating it 180 degrees and position it within the opening at the end of the unit (Figure 5). With the fan motor in the end discharge position the fan and housing orientation is top-horizontal. A straight air discharge arrangement, the housing is in the bottomhorizontal orientation. 7. Secure the fan assembly to the unit frame with the screws removed previously. 8. Reinstall the access panel in the fan motor access opening (Figure 6). 9.
Horizontal Unit Ductwork & Attenuation Discharge ductwork is normally used with these conditioners. Return air ductwork may also be required. All ductwork should conform to industry standards of good practice as described in the ASHRAE Systems Guide. The discharge duct system will normally consist of a flexible connector at the unit, a transition piece to the full duct size, a short run of duct, an elbow without vanes, and a trunk duct teeing into a branch duct with discharge diffusers as shown in Figure 7.
Return air ductwork can be connected to the standard filter rack. See Figure 9 (side filter removal shown). The filter rack can be installed for bottom filter removal or side filter removal by locating the brackets. For side filter removal the brackets should be located on the bottom, left side, and top. For bottom filter removal the brackets should be mounted on the left side top and right side with the spring clips supporting the filter.
Electrical Data General 1. Verify the compatibility between the voltage and phase of the available power and that shown on the unit serial plate. Line and low voltage wiring must comply with local codes or the National Electrical Code, whichever applies. 2. Apply correct line voltage to the unit. A 7⁄8" (22mm) hole and/or a 1-1⁄8" (29 mm) knockout is supplied on the side of the unit. A disconnect switch near the unit is required by code.
4. Some flexible hose threaded fittings are supplied with sealant compound. If not, apply Teflon tape to assure a tight seal. Figure 14: Condensate disposal trapping detail Figure 13: Sizes 007 through 060 shown Electrical Access Panel 1-1⁄2" (38mm) Hanger Kits (4) Optional Field- Installed Vent Flex Hoses Condensate Riser Ball Valves Supply Air Supply Riser Note: 1⁄4" Per Foot (21mm Per Meter) 1-1⁄2" (38mm) Return Riser Do not over-torque fittings.
3. 4. 5. 6. and blowdown, making sure city water fill valves are set to make up water at the same rate. Check the pressure gauge at pump suction and manually adjust the makeup to hold the same positive steady pressure both before and after opening the drain valves. Flush should continue for at least two hours, or longer if required, to see clear, clean drain water. Shut off supplemental heater and circulator pump and open all drains and vents to completely drain down the system.
Operating Limits Typical Water Source Heat Pump Common Design Temperatures Entering Air °F Operating Minimum Mode Entering Water °F Maximum Standard Range Extended Range DB WB DB WB Minimum Maximum Minimum Maximum Cooling 75 63 80 67 85 100 85 100 Heating 60 – 70 – 60 70 40 70 Water Source Heat Pump Operating Temperature Limits (For Continuous Duty) Entering Air °F Operating Minimum Mode Entering Water °F Maximum Standard Range Extended Range DB WB DB WB Minimum Ma
Table 2: MicroTech III unit controller terminals locations and descriptions H7 - 6 Red-Green-Yellow LED Common 24 VAC Common H8 - 1 1 Isolation Valve/Pump Request Relay N/O Fan Output - Switched L1 H8 - 2 Isolation Valve/Pump Request Relay N/C H2 - 2 Blank Terminal H8 - 3 24 VAC Common H2 - 3 Fan Neutral H9 - 1 Return Air Temperature Signal H1 - 1 24 24 VAC Power Input H1 - 2 C H2 - 1 SL1 N 1 H3 - 1 HP1-1 High Pressure Switch 1 Input Terminal 1 H9 - 2 Return Air Temper
Note: A random start delay time between 180 and 240 seconds is generated at power up. Figure 17: Location of configuration jumpers on the MicroTech III unit controller Figure 16: MicroTech III unit controller terminal locations The IV/PR(H8) terminals of the MicroTech III unit controller are used for motorized valve / pump restart. This terminal passes a voltage signal whenever the unit compressor is turned on. This signal is detected by a pump restart relay providing a N.O. or N.C.
MicroTech® III Unit Controller Table 4: MicroTech III unit controller LED & fault outputs The MicroTech III Unit Controller includes built-in features such as random start, compressor time delay, shutdown, condensate overflow protection, defrost cycle, brownout, and LED/fault outputs. Table 4 shows the LED and fault output sequences. The unit has been designed for operation with a microelectronic wall thermostat selected by the manufacturer. Do not operate the unit with any other type of wall thermostat.
MicroTech III Controller With LonWorks® Communication Module This manual covers the installation of a Daikin McQuay Horizontal Ceiling Hung Unit - Model CCH, CCW Water Source Heat Pump.
The module makes operational data and commands available on a communications network using BACnet objects and properties: ■ The network cable is a shielded twisted-pair cable ■ Network communications run up to 76.
Figure 20: LonWorks® Communication Module Placement on MicroTech™ III Unit Controller Page 18 of 36 / IM 1049-4
Changing PSC Fan Motor Speed Figure 22:Sizes 019 through 036 (208/230-60-1), (265-60-1) The fan motor can be changed from high to low speed or vice versa by interchanging the wires on the black and red labeled terminals on the motor terminal block. DANGER Hazardous Voltage! The installer must determine and follow all applicable codes and regulations. This equipment presents hazards of electricity, rotating parts, sharp edges, heat and weight.
Unit Size 042 through 060 (265-60-1), (208/230-1) & (208/230-3) Fan motors on unit sizes 042-060 in voltages 265-60-1, 208/230-1 and 208/230-3 (Figure 26) all have a five-position terminal block. In order to change between high and low speed, interchange the wires on the black and red terminals.
Typical Wiring Diagrams Figure 28: MicroTech III Unit Controller with PSC Motor – 208/230-60-1 Unit Sizes 015-060 Drawing No.
Typical Wiring Diagrams Figure 29: MicroTech III Unit Controller with PSC Motor – 208/230/460/575-60-3 Unit Sizes 024-070 Drawing No.
Typical Wiring Diagrams Figure 30: MicroTech III Unit Controller with ECM Motor – 208 /230-60-1 Unit Sizes 024-070 Drawing No.
Typical Wiring Diagrams Figure 31: MicroTech III Unit Controller with ECM Motor – 208/230-60-1 Unit Sizes 015-060 Drawing No.
Typical Wiring Diagrams Figure 32: MicroTech III Unit Controller with ECM Motor and Optional Communication Module – 460-60-3 Unit Sizes 024-070 Drawing No.
Thermostat Connections Figure 33: 7-Day Programmable Electronic Thermostat (P/N 668375301) Figure 35: Ferrite Core Noise Suppressor on Thermostat Cord Cable Low voltage, themostat wiring entry MicroTech III Unit Control Board Low Voltage Terminal Strip (Circuit 1) TB2 Thermostat Terminals 24VAC Common C Tenant Override O - Fan G + Cool 1 Y1 Cool 2 Y2 Heat 1 W1 Heat 2 W2 C R W1 Y1 W2 Ferrite Core Noise Suppressor on thermostat cable Y2 Alarm Output A 24VAC R G Ferrite Core Suppres
Wiring Sensors to the MicroTech III Unit Controller MicroTech III Wall-Mounted Room Temperature Sensors Figure 39: Temperature Sensor Wiring to MicroTech III Unit (P/N 668900801, 669088201, 669088101 Controller (Kit Part No.
Additional Accessories – General Figure 42: Multiple Unit Control Panel and Board Motorized Isolation Valve & Relay The motorized valve kit is available as a factory-installed and wired option or may be ordered as a field-installed accessory. Wired as shown in Figure 41, the motorized valve will open on a call for compressor operation. Valves for unit sizes 007 to 019 are 1/2" while unit sizes 024 to 060 are 3/4". Using a Normally Closed (N/C), power open valve, wire as illustrated in Figure 41.
Troubleshooting General Maintenance The in and outs of R-410A 1. Normal maintenance on all units is generally limited to filter changes. Units are provided with permanently lubricated motors and require no oiling even though oil caps may be provided. 2. Filter changes are required at regular intervals. The time period between changes will depend upon the project requirements.
Figure 44: Troubleshooting Refrigeration Circuit Air Water Head Suction Compressor Super Temp (loops) Temp Subcooling Pressure Pressure Amp Draw Heat Symptom Differential Differential Charge Undercharge System (Possible Leak) Low Low Low High Overcharge System High High High Normal Low Air Flow Heating High High Low Air Flow Cooling Low Low Low Low Low Water Flow Heating Normal Normal Low Low Low Low Pressure Normal High Pressure High Low High Pressure High Low Low T
Typical Refrigeration Cycles Figure 45: Cooling Mode – (Single Circuit Only Shown) Return Air Thermal Expansion Valve Co-Axial Heat Exchanger Water In Coil – Air to Refrigerant Heat Exchanger Water Out Sensing Bulb and Capillary Tube Compressor Blower Reversing Valve Conditioned Air – (Cooling) Cooling Refrigeration Cycle When the wall thermostat is calling for COOLING, the reversing valve directs the flow of the refrigerant, a hot gas, leaving the compressor to the water-to-refrigerant heat exchange
Troubleshooting the Water Source Heat Pump Unit Figure 47: Troubleshooting Guide - Unit Operation Low voltage, check power supply voltage Fuse may be blown, circuit breaker is open Wire may be loose or broken.
DANGER To avoid electrical shock, personal injury or death, be sure that field wiring complies with local and national fire, safety, and electrical codes, and voltage to the system is within the limits shown in the job-specific drawings and unit electrical data plate(s). Power supply to unit must be disconnected when making field connections. To avoid electrical shock, personal injury or death, be sure to rigorously adhere to field wiring procedures regarding proper lockout and tagout of components.
Daikin McQuay Training and Development Now that you have made an investment in modern, efficient Daikin McQuay equipment, its care should be a high priority. For training information on all Daikin McQuay HVAC products, please visit us at www. daikinmcquay.com and click on Training, or call 540-248-9646 and ask for the Training Department. Warranty All Daikin McQuay equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product Warranty.
