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CHECK ELECTRICAL POWER SUPPLY

The electrical power should be checked to determine if ade-
quate power is available, and near constant voltage can be
maintained. If there is any question concerning the power
supply, contact the local power company for corrections; oth-
erwise, unsatisfactory performance may result.

SELECTING EQUIPMENT LOCATIONS

Several important factors must be considered before selecting
the best site for the air conditioning outside unit:

Distance to indoor coil

Proximity to the structure

Proximity to vents and exhaust systems

Ability to service

Sound transmission

Air circulation

Wind direction

Relationship between structure, sun, and unit

Distance from power source

Water drainage

Local codes

Locate the outside unit near enough to the indoor coil vicinity
to eliminate lengthy refrigerant line runs. Do not locate the
outside unit so it discharges air under eaves or gutters. Rain
or snow melt-off should not be able to run off a roof and down
upon the unit. Be sure vents are not located upwind from the
outside unit.

A minimum clearance of 18 inches is required on one side of
the control panel for service. A 10 inch clearance is required for
the air inlet to the outdoor coil around the perimeter of the unit.
The air discharge of the unit requires a 60 inch clearance
between the top of the unit and any obstruction. See Figure 1.

The length of the refrigerant tubing, between the outdoor unit
and indoor coil, should be as short as possible to avoid capacity
and efficiency loss. Excessive spacing of the outside unit from
the home can lead to the refrigerant lines being restricted by
trampling or by being punctured by lawn mowers. Locate the
outside unit away from bedroom windows or other rooms where
sound might be objectionable.

Adverse effects of prevailing winds, blowing snow or sleet on
the outdoor coil can be eliminated by placing the outside unit
where the wind does not blow across the unit. Trees, shrubs,
corners of buildings and fences standing off from the coil can
reduce capacity loss due to wind chill effect.

Provide ample clearance from shrubs to allow adequate air to
pass across the outdoor coil without leaves or branches being
pulled into the coil.

Consideration should be given to the distance and routing of
electrical service that would have to be run to connect the
outside unit.

The unit must be located outdoors and must not be connected
to duct work. It is recommended the outside unit be mounted
on a concrete pad. Top of pad should be two inches above
grade. 

OUTDOOR UNIT

After the site has been selected a concrete base pad should
be provided. The concrete pad should not come in contact with
the foundation or side of the structure because sound may be
transmitted to the residence. The concrete pad need not be any
larger than the outside dimensions of the outdoor unit. The
concrete pad should be located far enough away from the
structure so the outside unit is not closer than its minimum
distances. See Figure 1. Set the outside unit upon the pad with
care to avoid damage.

Caution:

Do not remove the protective caps or plugs from
the unit refrigerant connections until the refrigerant
lines are run and ready for final connection. If this
procedure is not observed, dirt and other particles
will get into the system and plug various orifices
and small tubes.

AMBIENT AIR TEMPERATURE

ON OUTDOOR COIL

AIR TEMPERATURE

 ON INDOOR COIL

Min. °DB

Max. °DB

Min. °WB

Max. °WB

50

120

57

72

TABLE 1 - APPLICATION LIMITATIONS

CONTROL ACCESS PANEL

10" CLEARANCE 
COIL AREA

60" OVERHEAD
CLEARANCE

18" SERVICE 
ACCESS CLEARANCE

WEATHERPROOF
DISCONNECT
SWITCH

NEC CLASS 1 WIRING

THERMOSTAT

TO FURNACE OR AIR HANDLER
TERMINAL BLOCK

NEC CLASS 2 WIRING

TO INDOOR COIL

NOTE: ALL OUTDOOR WIRING MUST
BE WEATHERPROOF

SEAL OPENING(S) WITH PERMAGUM OR EQUIVALENT

FIGURE 1 - OUTDOOR UNIT LOCATION

550.46-N1YI

2

Unitary Products Group

Содержание H*RA

Страница 1: ...ir Conditioning and Refrigeration Institute Using unmatched components may not only affect the performance of the system but may also void the warranty of the equipment Do not install any coil in a furnace which is to be operated during the heating season without attaching the refrigerant lines to the coil Allowing the coil charge to enter the refrigerant lines prevents excessive refrigerant press...

Страница 2: ...utdoor coil can be eliminated by placing the outside unit where the wind does not blow across the unit Trees shrubs corners of buildings and fences standing off from the coil can reduce capacity loss due to wind chill effect Provide ample clearance from shrubs to allow adequate air to pass across the outdoor coil without leaves or branches being pulled into the coil Consideration should be given t...

Страница 3: ... and permitted to flow through tubing during brazing to displace air and prevent oxidation Remove the Schrader valve cores from the service valves Remove the plugs from the service valve field tubing connec tions Clean the joints to be brazed NOTE Do not overheat the connection to be brazed as this can cause improper flow of solder resulting in a weak and leaking joint Never apply heat directly to...

Страница 4: ...nd the refrigerantlines maybeconnectedpertheoutdoorunitinstruction However if another orifice should be used see the coil instruction for details to change to change the orifice in the coil OPENING BASE VALVES All models in this series have brass service valves These valves are not back seating Opening or closing valve does not close service port Service ports have Schrader valves for gauge connec...

Страница 5: ... Figures 3 and 4 5 Ground the outdoor unit using the ground lug provided Unless the outdoor unit is grounded through proper wiring to the service entrance ground a suitable separate ground should be provided at the outdoor unit C O N T A C T O R S T A R T R E L A Y N o t o n a l l M o d e l s F A N M O T O R P L U G D U A L R U N F A N C A P A C I T O R S T A R T C A P A C I T O R N o t o n a l l ...

Страница 6: ...ined as follows 1 Determine outdoor unit charge from tabular data sheet 2 Determine indoor coil adjustment from tabular data sheet 3 Calculate the line charge using Table 2 factors Calculate over 15 feet of sweat lines for sweat connect units NOTE For sweat connect lines the line charge over 15 feet should be included on the data plate and must be added to the system 4 Total system charge item 1 i...

Страница 7: ... 73 75 77 79 79 2 47 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 82 4 49 51 53 55 57 59 61 63 65 67 69 71 73 75 77 79 81 83 Saturation Temperature TABLE 4 Temperature and Pressure TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG TEMP F PRESSURE PSIG 45 76 02 60 101 62 75 132 22 90 168 40 105 210 75 46 77 58 61 103 49 76 134 45 91 171 02 106 213 81 47 79 17...

Страница 8: ...correctly SYSTEM OPERATION CHECK OUT STEP 1 With thermostat set to the OFF position close disconnect switch or switches to complete circuits to condens ing unit furnace or air handler Set thermostat to call for cooling STEP 2 After the system starts check the voltage and amperage at the condensing unit contactor STEP 3 If voltage is not within 10 of rated voltage or amperage greatly exceeds namepl...

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