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Page 21

High Pressure Switch (S4) 

This unit is equipped with a high pressure switch which is 

located on the liquid line. The SPST, normally closed pres-

sure switch opens when liquid line pressure rises above 

the factory setting of 590 ± 15 psig and automatically re-

sets at 418 ± 15 psig. 

Homeowners Information 

 CAUTION

Before attempting to perform any service or maintenance, 

turn the electrical power to unit OFF at disconnect switch.

In order to ensure peak performance, your system must 

be properly maintained. Clogged filters and blocked air

-

flow prevent your unit from operating at its most efficient 

level. The system should be inspected and serviced be-

fore each cooling and heating season by a licensed pro-

fessional HVAC service technician (or equivalent).

Homeowner Maintenance 

The following maintenance may be performed by the 

homeowner. 
•   Contact a licensed professional HVAC technician to 

schedule inspection and maintenance appointments for 

your equipment before each heating and cooling season. 

• 

 Check the indoor unit filter each month and replace the 

filter, if necessary. 

•   Have your Lennox dealer show you where your indoor 

unit filter is located. It will be either at the indoor unit 

(installed internal or external to the cabinet) or behind 

a return air grille in the wall or ceiling. Check the filter 

monthly and clean or replace it as needed. Disposable 

filters should be replaced with a filter of the same type 

and size. 

•   Check the indoor unit drain line for obstructions month-

ly. The indoor coil is equipped with a drain pan to collect 

condensate formed as your system removes humidity 

from the inside air. Have your dealer show you the loca-

tion of the drain line and how to check for obstructions. 

(This would also apply to an auxiliary drain, if installed.) 

•   Check the area around the outdoor unit monthly and 

remove any obstructions that may restrict airflow to the 

outdoor unit. This would include grass clippings, leaves, 

or papers that may have settled around the unit. 

•   Trim shrubbery away from the unit and periodically 

check for debris which collects around the unit. 

•   During the winter months, keep the snow level below 

the louvered panels. 

NOTE

 - 

The filter and all access panels must be in place 

any time the unit is in operation. If you are unsure about 

the filter required for your system, call your Lennox dealer 

for assistance.

 IMPORTANT

Sprinklers and soaker hoses should not be installed 

where they could cause prolonged exposure to the 

outdoor unit by treated water. Prolonged exposure 

of the unit to treated water (i.e., sprinkler systems, 

soakers, waste water, etc.) will corrode the surface of 

the steel and aluminum parts, diminish performance  

and affect longevity of the unit. 

Thermostat Operation 

See the thermostat homeowner manual for instructions on 

how to operate your thermostat. 

Pre-Service Check 

If your system fails to operate, check the following before 

calling for service: 
•  Verify room thermostat settings are correct. 
•  Verify that all electrical disconnect switches are ON.
•  Check for any blown fuses or tripped circuit breakers. 
•  Verify unit access panels are in place. 
• 

Verify air filter is clean. 

If service is needed, locate and write down the unit model 

number and have it handy before calling. 

Professional Maintenance 

NOTICE !

Failure to follow instructions will cause damage to 

the unit.
This unit is equipped with an aluminum coil. 

Aluminum coils may be damaged by exposure to 

solutions with a pH below 5 or above 9. The alumi-

num coil should be cleaned using potable water 

at a moderate pressure (less than 50psi). If the 

coil cannot be cleaned using water alone, Lennox 

recommends use of a coil cleaner with a pH in the 

range of 5 to 9. The coil must be rinsed thoroughly 

after cleaning.

In coastal areas, the coil should be cleaned with 

potable water several times per year to avoid corro-

sive buildup (salt).

Your heating and air conditioning system should be in-

spected and maintained twice each year (before the start 

of the cooling and heating seasons) by a licensed profes-

sional HVAC technician. You can expect the technician to 

check the following items. 

These checks may only be 

conducted by a licensed professional HVAC techni-

cian

Содержание Dave Lennox Signature SL28XCV

Страница 1: ...NTROL PANEL ACCESS LOCATION 6 152 36 914 12 305 30 762 24 610 LINE SET CONNECTIONS ACCESS PANEL REAR VIEW OF UNIT 48 1219 MINIMUM CLEARANCE BETWEEN TWO UNITS CLEARANCE ON ALL SIDES INCHES MILLIMETERS...

Страница 2: ...E FOR EXTRA STABILITY Deck Top Mounting Elevated Slab Mounting using Feet Extenders Stabilizing Unit on Uneven Surfaces WOOD OR PLASTIC SLAB NO PLASTIC ANCHOR HOLE DRILL 1 8 INSTALL UNIT LEVEL OR IF O...

Страница 3: ...8XCV 024 47 00 35 50 39 40 35 00 15 97 SL28XCV 036 47 00 35 50 39 40 35 00 15 97 SL28XCV 048 47 00 35 50 39 40 35 00 15 97 SL28XCV 060 47 00 35 50 39 40 35 00 15 97 4 5 8 117 BASE WITH ELONGATED LEGS...

Страница 4: ...ly charged with mineral oil or if it is being matched with a coil which was manufactured before January of 1999 the coil and line set must be flushed prior to installation Take care to empty all exist...

Страница 5: ...ths may be more or less depending on remaining system design factors Maximum linear actual length 150 feet Maximum linear liquid lift 60 feet NOTE Maximum lifts are dependent on total length number of...

Страница 6: ...50 41 31 22 1 2 25 50 60 60 60 60 3 8 25 50 36 22 8 NR 1 2 25 50 60 60 60 59 Shaded rows indicate rated liquid line size A Find your unit on the left side of the table B Start with the rated liquid li...

Страница 7: ...t the liquid line to the indoor unit s liquid line orifice housing LOW HIGH EXISTING INDOOR UNIT GAUGE MANIFOLD CYLINDER CONTAINING CLEAN HCFC 22 TO BE USED FOR FLUSHING Positioned to deliver liquid r...

Страница 8: ...t nitrogen flow will have an exit point NITROGEN HIGH LOW B A C PIPING PANEL REMOVAL PREPARING LINE SET CAP AND CORE REMOVAL Remove piping panel to access service valves Cut ends of the refrigerant li...

Страница 9: ...S POINT FLAME AWAY FROM SERVICE VALVE LIQUID LINE WATER SATURATED CLOTHS WATER SATURATED CLOTHS 6A 6B SUCTION VAPOR SERVICE PORT MUST BE OPEN AND MOVED TO ALLOW EXIT POINT FOR NITROGEN FLOW IMPORTANT...

Страница 10: ...bulb insulation is required if mountedexternal to the coil casing sensing bulb installation for bulb positioning STUB END TEFLON RING LIQUID LINE ASSEMBLY WITH BRASS NUT DISTRIBUTOR ASSEMBLY 3 Instal...

Страница 11: ...psig 1034 kPa Open the valve on the high side of the manifold gauge set in order to pressurize the line set and the indoor unit E After a few minutes open one of the service valve ports and verify th...

Страница 12: ...nifold gauge valves F When the absolute pressure requirement above has been met disconnect the manifold hose from the vacuum pump and connect it to a cylinder of HFC 410A positioned to deliver liquid...

Страница 13: ...ct Specifications bulletin EHB and unit rating plate WARNING ELECTROSTATIC DISCHARGE ESD Precautions and Procedures Electrostatic discharge can affect electronic components Take care during unit insta...

Страница 14: ...AT WIRING CONNECTION PUSH BUTTON 7 SEGMENT DISPLAY PUMP DOWN WHEN UNIT IS IN PUMP DOWN MODE Pd WILL BE DISPLAYED ON 7 SEGMENT TO ACTIVATE PUMP DOWN MODE THE CONTROL MUST BE IN THE IDLE STATE AND THE P...

Страница 15: ...Page 15 FIGURE 10 Typical Field Wiring...

Страница 16: ...TAPED 2 WRAPS MIN MACHINE TIGHTENED ARE NOT TAPED INTERNATIONAL UNITS M T VOLTAGE ARE ALWAYS TAPED 2 WRAPS MIN 6 REFER TO COMPRESSOR FOR ACTUAL TERMINAL ARRANGEMENT 7 WIRES WILL BE SHOWN GOING TO PRO...

Страница 17: ...d also include an additional wire that should be connected on each end to the C terminal as shown in the figure below Any excess high voltage field wiring should be trimmed and secured away from any l...

Страница 18: ...art Hub C i i R HD Display Subbase or Mag Mount COMMBUS A B ACC1 ACC2 SL28XCV Outdoor Unit SL28XCV RAST 6 Pin Connectors OATS Optional DATS Optional B A O Y1 FIGURE 12 SL28XCV with iComfort S30 Commun...

Страница 19: ...ANIFOLD GAUGE SET AND SERVICE VALVES The liquid and vapor line service valves are used for re moving refrigerant flushing leak testing evacuating checking charge and charging Each valve is equipped wi...

Страница 20: ...e table below Then add the additional refrigerant charge to the system Charge should be checked and adjusted using the ta bles provided on the charging procedure sticker on the unit access panel Detai...

Страница 21: ...shrubbery away from the unit and periodically check for debris which collects around the unit During the winter months keep the snow level below the louvered panels NOTE The filter and all access pan...

Страница 22: ...Pour water in pans to confirm proper drainage from the pan through to the outlet of the pipe Clean or replace as necessary 5 Inspect and clean indoor coil if necessary 6 Inspect the condition of the...

Страница 23: ...y Air Temperature Ambient Temperature Return Air Temperature System Refrigerant Charge Refer to manufacturer s information on unit or installation instructions for required subcooling and approach tem...

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