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Litho U.S.A.
E2010
WARNING
Improper installation, adjustment, alteration, ser-
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser-
vice must be performed by a qualified installer, ser-
vice agency or the gas supplier
CAUTION
Danger of sharp metallic edges. Can cause injury.
Take care when servicing unit to avoid accidental
contact with sharp edges.
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11/10
*2P1110*
INSTALLATION
INSTRUCTIONS
KHA180
KHA240
HEAT PUMP UNITS
506393−01
11/2010
Supersedes 10/2010
Table Of Contents
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Page 3
Page 3
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Page 5
Page 5
(15-TON)
(20-TON)
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
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*P506393-01*
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506393−01
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Summary of Contents for Lennox KHA180
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Page 1: Table Of Contents
INSTALLATION Litho U.S.A. INSTRUCTIONS E2010 WARNING KHA180 (15-TON) Improper installation, adjustment, alteration, ser- vice or maintenance can cause property damage, KHA240 (20-TON) personal injury or loss of life. Installation and ser- vice must be performed by a qualified installer, ser-... -
Page 2: Dimensions
KHA180 & 240 Dimensions 129−1/2 (3289) BASE 4−1/4 (108) 12−3/8 60−1/2 (1537) 28−3/8 (314) 15 (381) BOTTOM RETURN (721) AIR OPENING BOTTOM SUPPL Y AIR OPENINGS 91−1/8 (2315) 18 (457) ALTERNATE (THRU THE BASE) BASE CONDENSATE DRAIN LOCATION 5−5/8 (143) 1−5/8 in. -
Page 3: Parts Arrangement
KHA180 & 240 Parts Arrangement FILTERS INDOOR COIL (SIX − 24 X 24 X 2") ECONOMIZER OUTDOOR (OPTIONAL) FANS BLOWERS OUTDOOR COIL CONDENSATE DRAIN FILTER DRIERS COMPRESSORS ELECTRIC HEAT (OPTIONAL) The National Electric Code (ANSI/NFPA No. 70−1984) is Shipping and Packing List... -
Page 4: Unit Support
S The unit components, duct system, air filters and WARNING evaporator coil must be thoroughly cleaned following final construction clean−up. Electric shock hazard and danger of S The unit operating conditions (including airflow, explosion. Can cause injury, death or cooling operation, and heating operation) must be product or property damage. -
Page 5: Duct Connection
The condensate line must be FIGURE 3 vented. Check local codes concerning condensate disposal. Refer to pages 1 and 2 for condensate drain location. Page 5 KHA180, 240... -
Page 6: Electrical Connections
IMPORTANT − Unless field thermostat wires are rated for Electrical Connections maximum unit voltage, they must be routed away from line voltage wiring. Use wire ties located in control area WARNING to secure thermostat cable. Use18 AWG wire for all applications using remotely Electric shock hazard. -
Page 7: Unit Power−Up
2− Inspect all electrical wiring, both field- and 5− Make sure filters are in place before start-up. factory-installed, for loose connections. Tighten as required. 6− Apply power to unit. Page 7 KHA180, 240... -
Page 8: Blower Operation And Adjustment
B−Blower Operation Blower Operation And Adjustments Initiate blower demand at thermostat according to A−Three Phase Scroll Compressor Voltage Phasing instructions provided with thermostat. Unit will cycle on thermostat demand. The following steps apply to Three phase scroll compressors must be phased applications using typical... - Page 9 BHP and RPM required. Reference page 10 to counterclockwise, to tighten the belt. This increases determine the drive number and table 2 to determine the the distance between the blower motor and the blower housing. manufacturer’s model number. Page 9 KHA180, 240...
- Page 10 BLOWER DATA BLOWER TABLE INCLUDES RESISTANCE FOR BASE UNIT ONLY WITH DRY INDOOR COIL & AIR FILTERS IN PLACE FOR ALL UNITS ADD: 1 - Wet indoor coil air resistance of selected unit. 2 - Any factory installed options air resistance (heat section, economizer, etc.) 3 - Any field installed accessories air resistance (duct resistance, diffuser, etc.) Then determine from blower table blower motor output and drive required.
- Page 11 BLOWER DATA FACTORY INSTALLED OPTIONS/FIELD INSTALLED ACCESSORY AIR RESISTANCE - in. w.g. Wet Indoor Coil Filters Air Volume Horizontal Roof Electric Heat Economizer Curb 180S 240S MERV 8 MERV 13 4000 - - - - - - 4250 - - - - - - 4500 - - -...
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Page 12: Cooling Start−Up
TABLE 2 MANUFACTURER’S NUMBERS DRIVE COMPONENTS ADJUSTABLE SHEAVE FIXED SHEAVE BELTS SPLIT BUSHING OEM Part OEM Part Supplier OEM Part Supplier OEM Part Drive Supplier No. Supplier No. H.P. 1VP40x7/8 79J0301 BK95X1−7/16 80K1601 BX59 59A5001 1VP40x7/8 79J0301 BK72x1-7/16 100244−13 BX56 63K0501 1VP50x1−1/8 P−8−1977... - Page 13 Compressor circuits are protected by a high pressure normal operating pressures to confirm readings. switch which cuts out at 640 psig + 10 psig (4413 kPa TABLE 3 + 70 kPa). KHA180 NORMAL OPERATING PRESSURES 2− Freezestats (S49, S50) Outdoor Circuit 1 Circuit 2 Coil En- Switches de−energize compressors when indoor coil...
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Page 14: Defrost Control Board
the timing jumper is in the TEST position at power-up, the Defrost Control Board defrost control will ignore the test pins. When the jumper The defrost thermostat, defrost pressure switch and the is placed across the TEST pins for two seconds, the defrost control work together to ensure that the heat control will enter the defrost mode. -
Page 15: Heating Start−Up
Annually inspect supply air blower wheel for accumulated grease to purge through the bearings so that a bead of dirt or dust. Turn off power before attempting to remove grease appears at the seal lip contacts. access panel or to clean blower wheel. Page 15 KHA180, 240... - Page 16 CLEAN CONDENSER COIL END PLATE IS SECURED TO MULLION OUTDOOR COIL TOP VIEW 1− Remove unit outdoor section top panel and outdoor INDOOR COIL coil access panel. 2− Remove screws securing coil end plates to mullions. OUTDOOR 3− Remove wire ties connecting coils slabs and separate COIL ACCESS PANEL slabs 3−4"...
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