Table of Contents
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HS29−072
HS29−120
Retain These Instructions
For Future Reference
IMPORTANT
Improper installation, adjustments, 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 or
servcice agency.
09/02
*2P0902*
INSTALLATION
INSTRUCTIONS
HS29−072
HS29−090
HS29−120
All units are equipped with a scroll compressor
CONDENSING UNITS
504,561M
09/02
Supersedes 504,544M
See unit nameplate for manufacturer and address.
2002
Table of Contents
Shipping & Packing List
General Information
Dimensions
HS29−090
Shipping & Packing List
1 − Assembled condensing unit
1 − Filter drier
Check equipment for shipping damage. If you find any
damage, immediately contact the last carrier.
General Information
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
The Clean Air Act of 1990 bans the intentional vent
ing of refrigerant (CFCs and HCFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incar
ceration may be levied for noncompliance.
Units are shipped with a holding charge of dry air
and helium, which must be removed before the unit
is evacuated and charged with refrigerant.
Page 1
(6 TON)
(7.5 TON)
(10 TON)
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IMPORTANT
IMPORTANT
*P504561M*
Litho U.S.A.
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504,561M
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Table of Contents
Related Manuals for Lennox HS29-072
Summary of Contents for Lennox HS29-072
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Page 1: Table Of Contents
INSTALLATION INSTRUCTIONS HS29−072 (6 TON) HS29−090 (7.5 TON) HS29−120 (10 TON) All units are equipped with a scroll compressor CONDENSING UNITS 504,561M HS29−072 09/02 Supersedes 504,544M Litho U.S.A. See unit nameplate for manufacturer and address. 2002 Table of Contents Shipping & Packing List . - Page 2 HS29−072 & HS29−090 Dimensions − inches (mm) Corner Weight Center Of Gravity Model No Model No. Model No Model No. lbs. lbs. lbs. lbs. inch inch HS29−072 HS29−072 22−3/4 HS29−090 HS29−090 23−7/8 15−3/4 Outdoor Fan And Guard Outdoor Fan Inlet And Guard Compressor Compressor...
- Page 3 HS29−120 Dimensions − inches (mm) Corner Weight Center Of Gravity M d l N Model No. M d l N Model No. lbs. lbs. lbs. lbs. inch inch HS29−120 HS29−120 30−1/2 17−5/8 Outdoor Coil Control Outdoor Coil Inlet Air Center Of Gravity Outdoor Fans And Guards (2)
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Page 4: Parts Arrangement
HS29−072, 090 Unit Parts Arrangement (HS29−072) fan guard control box condenser fan motor (B4) high pressure switch (S4) low pressure switch (S87) suction line service valve low ambient switch (S11) liquid line compressor (B1) service valve Figure 1 HS29−120 Unit Parts Arrangement fan guards control box condenser fan... - Page 5 HS29−072 & HS29−090 Control Box Arrangement outdoor fan relay latching relay minimum (K10) (K167) run timer (DL33) ground lug capacitor contactor (C1) (K1) Figure 3 HS29−120 Control Box Arrangement outdoor fan relay 1 (K10) outdoor fan relay 2 (K68) minimum run timer (DL33) latching relay (K167)
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Page 6: Setting The Unit
Installation Clearances WARNING Note− 48 in. (1219 mm) clearance required above top of unit. NOTE − The matching indoor unit contains fiber HS29−072, 090 (HS29−090 Shown) glass wool. Disturbing the insulation in this product during (914) installation, maintenance, or repair will expose you to fiberglass wool dust. -
Page 7: Rigging The Unit For Lifting
and local codes. Refer to the furnace or blower coil installa Rigging the Unit for Lifting tion instructions for additional wiring application diagrams. Rig the unit for lifting by attaching four cables to the holes in Refer to the unit nameplate for minimum circuit ampacity the base rail of the unit. - Page 8 Typical Unit Wiring Diagram HS29−072, 090 Figure 8 Page 8...
- Page 9 Typical Unit Wiring Diagram HS29−120 Figure 9 Page 9...
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Page 10: Plumbing
When line lengths exceed 50 feet (15 m), install a liquid line Plumbing solenoid at the evaporator coil. In addition, use only expan Field refrigerant piping consists of liquid and suction lines sion valves (RFC and cap tube expansion devices are not exiting the condensing unit. - Page 11 HCFC 22 Liquid Line Pressure Drop/Velocity At 45°F Evaporating Temperature and 125°F Condensing Temperature HCFC 22 Liquid Line Pressure Drop (lbs./100 Feet) 10 9 8 7 1.0 .9 .8 .7 .6 EXAMPLE: 12.5 10−TON UNIT 5/8 IN. O.D. LINE 4.25 PSIG DROP PER 100 FEET 275 FPM VELOCITY...
- Page 12 Figure 10 illustrates the relationship between liquid line siz Pressure drop due to friction Pressure drop in ing, pressure drop per 100 feet, velocity range, and ton the liquid line nage. Remember, when using liquid line solenoid valves, Pressure drop due to vertical lift velocities should not exceed 300 fpm (1.5 m/s).
- Page 13 The total friction drop for the application will include 96 feet However, systems lose approximately 1% of capacity for (29 m) of 5/8 inch O.D. pipe plus 1 equivalent foot per elbow every pound of pressure drop due to friction in the suction (two elbows) to equal 98 equivalent feet.
- Page 14 HCFC 22 Suction Line Pressure Drop/Velocity Per 100 Feet Of Line At 45°F Evaporating Temperature and 125°F Condensing Temperature HCFC 22 Suction Line Pressure Drop (lbs./100 Feet) 10 9 8 7 1.0 .9 .8 .7 .6 12.5 12.5 EXAMPLE: 10 TON UNIT 1 3/8 IN.
- Page 15 Example −− Suction Line Pipe Sizing From figure 3, four ells at 2.4 equivalent feet each equals 9.6 equivalent feet. When added to the 82 feet of pipe, the Given: 7 1/2 ton condensing unit with evaporator lower total equivalent feet becomes 91.6 feet (round up to 92 than condenser.
- Page 16 The second suction riser must enter the main suction line Double Suction Riser Exampl from the top to avoid oil draining down the second riser dur Double Suction 40 FT. ing a partial load. Riser 10 Ton Condensing Unit With Hot Gas Typical Double Suction Riser Bypass Double Suction...
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Page 17: Service Valves
Size large riser 2.66 2 = 1.33 (average pressure drop through A (Riser carrying largest part of load) and B risers) The larger line carries 6.5 tons capacity at full load. Select Find the pressure drop for the horizontal run of pipe. A from figure 14 a 1 1/8 inch O.D. -
Page 18: Leak Testing
All units are equipped with a full service ball valve, as Liquid And Suction Line Service Valve shown in figure 20. One service port that contains a (Valve Open) stem cap Schrader valve core is present in this valve. A cap is also insert hex wrench here provided to seal off the service port. -
Page 19: Evacuation & Dehydration
2 − Open the high pressure side of the manifold to allow IMPORTANT the HCFC 22 into the line set and indoor unit. Weigh in a trace amount of HCFC 22. [A trace amount is a maxi Never use compliant scroll compressors (as with mum of 2 ounces (57 g) refrigerant or 3 pounds (31 any refrigerant compressor) to evacuate a refrigera kPa) pressure]. -
Page 20: Start−Up
9 −Reconnect the manifold gauge to the vacuum pump, 4 − Check the voltage supply at the disconnect switch. The turn the pump on, and continue to evacuate the line voltage must be within the range listed on the unit set, indoor unit, and outdoor unit. -
Page 21: Charging
Charging Table 4 ADJUSTMENT PER UNIT MODEL MATCHED HCFC 22 FOR 25 FEET LIQUID LINE FOOT (.305 M) OF NUMBER INDOOR UNIT (7.62 M) OF LINE DIAMETER LINE* 1/2 in. (13 mm) 1.1 oz. (31 g) HS29 072 HS29−072 CB17/CBH17 95 CB17/CBH17−95 12 lbs 8 oz (5 7 Kg) 12 lbs. -
Page 22: System Operation Maintenance
Verifying the Charge Using Approach Method Minimum Run Timer Control for Temperatures > 60°F only All units are equipped with a minimum run time control. This control prevents the compressor from short cycling Do not use the approach method if the system pressures and ensures that the oil returns to the compressor properly. -
Page 23: Start−Up & Performance Check List
Evaporator Coil sure drop over the coil to determine the correct blower CFM. Refer to the unit information service manual for 1 − If necessary, clean the coil. pressure drop tables and procedure. 2 − Check connecting lines and coils for evidence of oil 3 −...