Table of Contents
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Table of Contents
Summary of Contents for Enerzone CAH 33-44-50
- Page 1 CAH SERIES INSTALLATION & MAINTENANCE MODELS CAH 33-44-50 CAH 49-54-70...
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Page 2: Table Of Contents
CAH VARIABLE SPEED AIR HANDLERS DIMENSIONS................3 TECHNICAL SPECS ..............4 INSTALLATION DON’TS ..............5 INSTALLATION DO’S ................. 6 FREEZE STAT REQUIRED FOR AIR CONDITIONING ....7 INSTALLATION INSTRUCTION ........... 8 LOCATING THE AIR HANDLER ............8 LINE AND CONTROL WIRING REQUIREMENTS ......8 SUPPLY AND RETURN DUCT REQUIREMENTS ...... -
Page 3: Dimensions
DIMENSIONS MODEL 17” 23” 35.5” 12” 18” 11” CAH 33-44-50 21.25” 23” 43.75” 16” 18” 17” CAH 49-54-70 ALL MEASUREMENTS IN INCHES... -
Page 4: Technical Specs
TECHNICAL SPECS MODEL CAH 33-44-50 CAH 49-54-70 @ 600 CFM 37,000 * @ 800 CFM 45,000 * @ 1000 CFM 52,000 * 58,000 ** @1200 CFM 65,000 ** @1600 CFM 76,000 ** POWER 120 VAC, 1PH, 120 VAC, 1PH, SUPPLY... -
Page 5: Installation Don'ts
INSTALLATION DO’S AND DON’TS INSTALLATION DON’TS Do Not use with piping that has been treated with chromates, boiler seal or other chemicals. Do Not add boiler treatment or any chemicals to equipment and related piping, since the piping contains potable water for Domestic Use. Do Not use with ferrous piping. -
Page 6: Installation Do's
INSTALLATION DO’S Do flush out all supply and return water lines between the unit and the water heater after installation and before start-up to eliminate flux, metal chips, sand, or any other particulate matter just as you would with any other plumbing systems. Do use only non-lead solder and flux agents. -
Page 7: Freeze Stat Required For Air Conditioning
FREEZE STAT REQUIRED FOR AIR CONDITIONING A freeze stat MUST be installed for systems that have air conditioning to minimize the chance of the hot water coil freezing during a call for cooling. The freeze stat typically opens at 38˚F, closes at 60˚F, and is wired to interrupt the A/C compressor operation. -
Page 8: Installation Instruction
INSTALLATION INSTRUCTION ENERZONE assumes no responsibility for the installation of equipment that is in violation of any building code, plumbing code, or electrical code requirements. These instructions give information specific to installation of CAH fan coil units only. For other related equipment, refer to proper instructions supplied by others. -
Page 9: Supply And Return Duct Requirements
SUPPLY AND RETURN DUCT REQUIREMENTS All duct work must adhere strictly to all local and national code requirements. It is critical that the return air duct has the same free area as the opening provided on the fan coil unit. If there is no ducted return, installation codes may limit the unit to installation only in a single story residence. - Page 10 Figure 3 Figure 4 Figure 3: Correct way to install duct work. Figure 4: Incorrect way to install duct work...
- Page 11 Typical Air Handler Schematic...
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Page 12: Thermostat Selection
THERMOSTAT SELECTION Most standard 24VAC thermostats will work with the Enerzone CAH EC Motor air handlers. POWER SUPPLY: NON-POWER STEALING (Battery or 24 VAC Voltage supply) DISPLAY: ANALOG OR DIGITAL with or without programmable set points. NOTE : ENERZONE recommends hard wiring the thermostat to run off the 24VAC transformer in place of using POWER STEALING THERMOSTATS. -
Page 13: Blower Motor Wire Selection Chart
PURPLE/TRACE 800 CFM BOOST 1200 CFM BOOST BLACK/TRACE 1000 CFM 1600 CFM EXAMPLE: Model CAH 33-44-50 Blue/Trace wire onto the heat / cool fan speed Terminal Unit will run at 800 cfm for both heating and cooling (@0.4” external static) -
Page 14: Hot Water Coil Piping
HOT WATER COIL PIPING The water coil connections are: ½” nominal (5/8”OD) copper on all models with internal pump factory installed. An air purge valve must be installed between the air handler outlet and the return water isolation valve. Flow stickers indicate the proper water flow direction. Isolation valves must be placed in both the hot water supply and return water lines to the hot water tank so that the CAH unit may be serviced or repaired without causing excessive water discharge. -
Page 15: Operation And Maintenance
OPERATION AND MAINTENANCE INITIAL START-UP THE “DO’S AND DON’TS” PAGES ARE AN INTEGRAL PART OF THE INSTALLATION INSTRUCTIONS. IT MUST BE READ THOROUGHLY UNDERSTOOD PRIOR ATTEMPTING TO INSTALL CAH AIR HANDLERS Prior to start-up, inspect the blower to confirm the blower wheel turns freely without interfering with the housing. - Page 16 To purge the air from the system once your installation is complete do the following steps: Attach a hose to the air purge valve and run the hose to a bucket or drain. This hose is a modified refrigeration Schrader valve charging hose. Close the isolation valves on the hot water supply and return.
- Page 17 5. The thermostat on the water heater should be adjusted so that the water temperature entering the hot water coil is nominally at 140 °F (See DO’S and DON’TS section for mixing valve requirement for higher temperatures), depending upon unit selection temperature.
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Page 18: Air Filter
AIR FILTER The air filter should be cleaned as often as necessary to prevent restriction of air flow (every three months under normal conditions). Always replace the filter with the same type as originally furnished. BLOWER MOTOR The Variable speed motor has sealed bearings and routine oiling is not required or possible. -
Page 19: Pump Control
PUMP CONTROL: LOW VOLTAGE CONTROL BOARD Note: Upon powering up the air handler circuit board starts a 15 second initialization during which the pump operates for 5 seconds. Circuit board LED illuminates when the pump is operating during heating and pump purge cycles. -
Page 20: Troubleshooting
TROUBLESHOOTING MOST LIKELY PROBLEMS AND CAUSES Important: For system to operate properly power should be turned ON and all shut-off valves/isolation valves must be open. If Pump Does Not Run: Circuit board controls operation of pump. Check that pump LED is illuminated. Check for 24VAC at pump terminal on circuit board. - Page 21 There may be a faulty TAP on the motor. Select a different speed on the motor tap selection tree. Refer to the “Selecting Fan Speeds” section. Possible defective motor. Contact Enerzone for assistance. When ordering a new motor the air handler model number and serial number will be required.
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Page 22: Faulty Circuit Board
FAULTY CIRCUIT BOARD: The circuit board has a Green power LED and 3 function LED’s. When any of the 3 output LED’s are illuminated 24VAC is supplied to the corresponding ¼” Spade terminal on the board. If the Green power LED is not illuminated check that the board fuse is not blown and replace if necessary. -
Page 23: Wiring Diagrams
WIRING DIAGRAMS... -
Page 24: Replacement Parts List
REPLACEMENT PARTS LIST MODEL CAH 33-44-50 CAH 49-54-70 RELAY PTRA-1C-24C-T5-X PTRA-1C-24C-T5-X TRANSFORMER PU30va PU30va MOTOR CAH37-1/3ECM CAH58-3/4ECM DOOR SWITCH CARLING-TA20B CARLING-TA20B COIL BC9061 BC7923FX HOUSING DC1016-600-5 DC1020-800-5 PUMP UPS15-58RU UPS15-58RU CHECK VALVE 96806141 96806141 CONTROL PT-ECB V1.0 PT-ECB V1.0 BOARD...
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