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Lennox HS29-072, Installation Instructions Manual

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Lennox HS29-072 Installation Instructions Manual Download Page 5

Page 5 

HS29−072 & HS29−090 Control Box Arrangement

Figure 3

contactor

(K1)

capacitor

(C1)

minimum
run timer

(DL33)

outdoor fan relay

(K10)

latching relay

(K167)

ground lug

HS29−120 Control Box Arrangement

Figure 4

contactor (K1)

low ambient

thermostat

(S41)

capacitor

(C1,C2)

latching

relay (K167)

 outdoor fan

relay 2 (K68)

outdoor fan

relay 1 (K10)

minimum run

timer (DL33)

ground

lug

Summary of Contents for HS29-072

Page 1: ...ting 7 Electrical 7 Plumbing 10 Service Valves 17 Leak Testing 18 Evacuation Dehydration 18 Start Up 19 Charging 20 System Operation 21 Maintenance 21 Start Up Performance Check List 22 Shipping Packi...

Page 2: ...et Air Inlet Air AA BB CC DD Center Of Gravity EE FF AA BB CC DD Center Of Gravity EE FF Compressor A 3 1 4 83 34 864 B Control Box Access Side View Lifting Holes For Rigging Forklift Slots Both Sides...

Page 3: ...l Outdoor Fans And Guards 2 Control Box Lifting Holes For Rigging Forklift SlotS Both Sides Discharge Air Inlet Air Electrical Inlets Either Side Liquid Line Either Side 1 7 16 37 6 5 8 168 4 3 8 111...

Page 4: ...lve low pressure switch S87 low ambient switch S11 fan guard compressor B1 liquid line service valve HS29 120 Unit Parts Arrangement Figure 2 condenser fan motor B4 B5 control box low ambient switch S...

Page 5: ...C1 minimum run timer DL33 outdoor fan relay K10 latching relay K167 ground lug HS29 120 Control Box Arrangement Figure 4 contactor K1 low ambient thermostat S41 capacitor C1 C2 latching relay K167 ou...

Page 6: ...ve grade to allow water to drain adequately Locate the top of the slab so that run off water from higher ground will not collect around the unit Roof Mounting Install the unit at a minimum of 4 inches...

Page 7: ...y and maximum overcurrent protection size WARNING Unit must be grounded in accordance with national and local codes Electric Shock Hazard Can cause injury or death Line Voltage Knockouts are provided...

Page 8: ...Page 8 Typical Unit Wiring Diagram HS29 072 090 Figure 8...

Page 9: ...Page 9 Typical Unit Wiring Diagram HS29 120 Figure 9...

Page 10: ...elihood of slugging is greatly increased if the lines are over 50 feet 15 m An incremental increase in liquid line size results in a 40 to 50 percent increase in liquid refriger ant to fill the line T...

Page 11: ...2 1 5 1 0 9 8 7 6 5 4 3 2 HCFC 22 Liquid Line Pressure Drop lbs 100 Feet NOTE Shaded area represents unacceptable velocity range Figure 10 12 5 40 30 20 15 40 30 20 15 EXAMPLE 10 TON UNIT 5 8 IN O D...

Page 12: ...e drop due to friction and the pressure drop due to vertical lift then add the two Pressure drop due to friction Pressure drop due to vertical lift Pressure drop in the liquid line You must consider t...

Page 13: ...00 fpm velocity for oil entrainment In order to ensure oil entrainment suction risers require a mini mum velocity of 1200 fpm 1500 fpm is preferred re gardless of the length of the riser Figure 14 ill...

Page 14: ...0 9 8 7 6 5 4 3 2 1 5 1 0 9 8 7 6 5 4 3 2 HCFC 22 Suction Line Pressure Drop lbs 100 Feet NOTE Shaded area denotes unacceptable velocity range Figure 14 40 30 20 15 40 30 20 15 EXAMPLE 10 TON UNIT 1 3...

Page 15: ...ss of 1 8 psig Use figure 14 to calculate the pressure drop in 25 feet of 1 3 8 inch line Multiply 2 100 by 25 feet to calculate friction loss of 0 5 psig This loss has already been included in the ca...

Page 16: ...ells Find Select tube sizes for horizontal runs and risers fig ure 14 Determine if double suction risers are necessary Size the double suction riser for proper system perfor mance Solution Size each s...

Page 17: ...psig The total pressure drop for the riser is equal to the average of the pressure drop in both risers 1 4 B riser drop 1 26 A riser drop 2 66 2 66 2 1 33 average pressure drop through A and B risers...

Page 18: ...Schrader valve core is present in this valve A cap is also provided to seal off the service port The valve is not re buildable so it must always be replaced if failure has oc curred Opening the Suctio...

Page 19: ...the manifold gauge set to the service valve ports as follows D low pressure gauge to suction line service valve D high pressure gauge to liquid line service valve 3 Purge the system of dry air helium...

Page 20: ...isted on the unit nameplate If it is not do not start the equipment until you have consulted the power company and the volt age condition has been corrected 5 To start the unit set the thermostat for...

Page 21: ...1 105_F 40_C 298 71 308 82 314 77 290 73 115_F 46_C 333 72 342 83 352 79 328 74 HS29 072 tested with CB30U 65 Pressure shown is with typical 5 ton indoor coil match up HS29 072 and HS29 090 tested wit...

Page 22: ...time control This control prevents the compressor from short cycling and ensures that the oil returns to the compressor properly When a cooling cycle begins the run time control keeps the compressor o...

Page 23: ...al ____________ Start Up Performance Check List HS29 072 090 120 Job Name Job Location Installer Unit Model No Nameplate Voltage Minimum Circuit Ampacity Maximum Overcurrent Protection Size Refrigeran...

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