LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0805442

User Manual: LENNOX LENNOX Air conditioner/heat pump(outside unit) Manual LENNOX Air conditioner/heat pump(outside unit) Owner's Manual, LENNOX Air conditioner/heat pump(outside unit) installation guides

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188595

,?u2006 Lennox industries Inc,

Dallas, Texas, USA

X_ WARNING

INSTALLATION

INSTRUCTIONS

10ACE Series Units

CONDENSER UNITS _ Technical

505,128M LL.L[ Publications

03/06 Litho U.S.A.

Supersedes 01/06

X_ IMPORTANT

10ACE Outdoor Units .......................... 1

Shipping & Packing List ........................ 1

General Information ........................... 2

Unit Dimensions ............................... 2

Setting the Unit ............................... 2

Electrical ..................................... 3

Refrigerant Piping ............................. 4

Refrigerant Metering Devices ................... 4

Manifold Gauge Set ........................... 5

Service Valves ................................ 5

Leak Testing .................................. 6

Evacuation ................................... 6

Start-Up ...................................... 7

Refrigerant Charging ........................... 8

System Operation ............................. 10

Maintenance .................................. 10

Optional Accessories .......................... 11

Start-Up & Performance Check List .............. 11

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

AI_CAUTION

_I_WARNING

03/06

IIIIIIIIIIIIIIIIIIIIIIHIllllllllllll

Lennox Merit® 10ACE outdoor units are designed for use

in either fixed orifice or expansion valve (TXV) systems,

The TXV may require a field-installed hard start kit. Refer

to the Lennox Engineering Handbook for expansion valve

kits which must be ordered separately.

1 - Assembled outdoor unit

1 - Fixed orifice refrigerant metering device

Check the unit for shipping damage. Consult last carrier

immediately if damage is found.

Page 1 505,128M

IIIIIIIIIIIIlllllll]lllllllllllllllllllllllllllll

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AIR

.---11_4 -3/8 I._l-- ---I,44-3/8 _1--.

AIR f I(111) F - li!11)1 f

-_ _. 4-3/8I,_I" ' _-%1 4-3/8

_'_ (111)1,/,.k, .,-k_

il

'/fT_'_%JJf/_.\ [I OPTIONALUNIT YI[U I xU]l ,

!/ i _\1 Yt_J_\ LI -- STAND-OFFKIT(4)/ILH C°MPRESSOR HII

I (Fieldlnstalled)" 14fl \'- --' UI

\\J__/II A_R COILDRAINOUTLETSfII! IF --- _11 .

_llllll\\\\\\XX_"'_/..-_ (Around perimeter of base) T II f2, Illl ,I,

------ VAPOR LINE "_11/_ I_._X_ c:z:::_ (_

AIR LIQUID LINE --I_ 6-3/8 _ _1,,_4-3/8__1

CONNECTION Vl (162) I_ vI(111)I

TOP VIEW BASE SECTION

111-- C,.._I OUTDOOR

_I COIL FAN

OPTIONAL

UNIT

STAND-OFF

KIT (4)

(Field

Installed) \

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I

11

I

g

L.J. _ 2 (51)

3/4%,

ELECTRICAL

INLETS

10ACE Model A B C

-024 25 (635) 24-1/4 (616) 24-1/4 (565)

-036 33 (635) 32-1/4 (616) 24-1/4 (565)

-048 33 (838) 32-1/4 (819) 24-1/4 (616)

-060 33 (940) 32-1/4 (921) 24-1/4 (718)

These instructions are intended as a general guide and do

not supersede national or local codes in any way. Consult

authorities who have jurisdiction before installation,

When servicing or repairing HVAC components, ensure

the fasteners are appropriately tightened. Table 1 shows

torque values for fasteners.

COMPRESSOR

VAPOR &

LIQUID LINE

CONNECTION

2-3/4 (70)

-- C i .._1

DISCHARGE AIR _1

• I\

I I

'LLJ

SIDE VIEW

Table 1

Torque Requirements

Part Recommended Torque

Service valve cap 8 ft.- lb. 11NM

Sheet metal screws 16 in.- lb. 2 NM

Machine screws #10 28 in.- lb. 3 NM

Compressor bolts 90 in.- lb. 10 NM

Gauge port seal cap 8 ft.- lb. 11NM

Refer to unit dimensions for sizing mounting slab, plat-

forms or supports. Refer to figure 1 for installation clear-

ances.

505128M 03/06

Page 2

Slab Mounting

When installing unit at grade level, install on a level slab

high enough above grade to allow adequate drainage of

water. Top of slab should be located so run-off water from

higher ground will not collect around unit,

Installation Clearances

(as noted) (as noted)

*A service clearance of 30" (762 mm) must be maintained on one of

the sides adjacent to the control box. Clearance to one of the other

three sides must be 36" (914 mm). Clearance to one of the remaining

two sides may be 12" (304 mm) and the final side may be 6" (152

ram),

A clearance of 24" (610 mm) must be maintained between two units.

48" (1219 mm) clearance required on top of unit. Maximum soffit over-

hang is 36" (914 mm).

Figure 1

.Roof Mounting

Install the unit at a minimum of 4 inches (102 mm) above

the surface of the roof, Ensure the weight of the unit is

properly distributed over roof joists and rafters, Redwood

or steel supports are recommended,

In Canada, wiring must conform with current local codes and

the current Canadian Electrical Code (CEC),

_WARNING

Refer to the furnace or blower coil installation instructions

for additional wiring application diagrams and refer to unit

nameplate for minimum circuit ampacity and maximum

overcurrent protection size.

1, Install line voltage power supply to unit from a properly

sized disconnect switch.

2. Install line voltage power supply to unit from a properly

sized disconnect switch. Any excess high voltage field

wiring should be trimmed or secured away from the

low voltage field wiring (see figures 2 and 3),

Separating High/Low Voltage Field Wiring

// /

High Voltage

WIRE Field Wiring

TIES -- Low Voltage

Field Wiring

---- Factory

Wiring

Figure 2

Typical Field Wiring Diagram

OUTDOOR _ START *

_FAN CAPACITOR CE2

DUAL

CAPACITOR

I BLACK

ORANGE __

RED K31 *A&

POTENT[AL RELAY *TIMED OFF CONTROL

BLACK COMPRESSOR F-

CONTACTOR (_

G (SEE

•-048 & NOTE)

208-230/60/1

-060

models I I _IL2

LE

I

GROUND

WARNING! - ELECTRIC SHOCK HAZARD Can cause INJURY

or DEATH, Unit must be grounded in accordance with national and

local codes.

NOTE - For use with copper conductors only. Refer to unit rating

plate for minimum circuit ampacity and maximum over-current

protection size.

Figure 3

3. Ground unit at unit disconnect switch or to an earth

ground.

NOTE -To facilitate conduit, a hole is located in the

bottom of the control box. Connect conduit to the con-

trol box using a proper conduit fitting. Units are ap-

proved for use only with copper conductors.

24V, Class II circuit connections are made to the low

voltage pigtafs. Refer to figure 3for field wiring dia-

gram. A complete unit wiring diagram is located inside

the unit control box cover.

4. Install room thermostat (ordered separately) on an in-

side wall approximately in the center of the conditioned

area and 5 feet (1.5 m) from the floor. It should not be

installed on an outside wall or where it can be effected

by sunlight, drafts or vibrations.

Page 3

10ACE SERIES

NOTE -For proper voltages, select thermostat wire

gauge per the following chart:

Wire run length AWG # Insulation type

less than 100' (30m) 18 color-coded, temperature

more than 100' (30m) 16 rating 35°C minimum

5. Install low voltage wiring from outdoor to indoor unit

and from thermostat to indoor unit, See figure 4.

Typical Field Low Voltage Wiring Diagram

Thermostat Indoor Unit

p.....

Outdoor Unit

@ heat

Q ooo,,nq

Qindoor blower @

NOTE -see unit wiring diagram for power supply connec-

tions. If indoor unit is not equipped with blower rela_zItmust

be field-provided and installed (P-8-3251 or equivalent).

Figure 4

Field refrigerant piping consists of liquid and vapor lines

from the outdoor unit (sweat connections) to the indoor coil

(flare or sweat connections). Use Lennox L15 (sweat, non-

flare) series line sets as shown in table 2 or use field-fabri-

cated refrigerant lines, Refer to Refrigerant Piping Guide

(Corp. 9351-L9) for proper size, type, and application of

field-fabricated lines. Valve sizes are also listed in table 2.

Table 2

Refrigerant Line Kits

Valve Field Size

Connections Recommended Line Set

Liquid Vapor Liquid Vapor L15

Model Line Line Line Line Line Sets

-024 3/8 in 3/4 in. 3/8 in 3/4 in. L15-41

-036 (10mm) (19mm) (10mm) (19mm) 15 ft,- 50 ft.

(4.6 m - 15m)

-048 3/8 in 7/8 in. 3/8 in 7/8 in. L15-65

(10 mm) (22 mm) (10 mm) (22 mm) 15 ft,- 50 ft.

(4.6 m - 15m)

-060 3/8 in 1-1/8 in. 3/8 in 1-1/8 in. Field

(10 mm) (29 mm) (10 mm) (29 mm) Fabricated

NOTE - Units are designed for line sets of up to 50 feet (15 m), For

applications longer than 50 feet, consult the Lennox Refrigerant Piping

Guide (Corp. 9351-L9), Select line set diameters from table 2 to en-

sure that oil returns to the compressor.

Sweat Connection Procedure

1, Cut ends of the refrigerant lines square (free from

nicks or dents), Debur the ends. The pipe must remain

round, do not pinch end of the line,

2. Wrap a wet cloth around the valve body and copper

tube stub to protect it from heat damage during braz-

ing, Wrap another wet cloth underneath the valve body

to protect the base paint,

3, Quench the joints with a wet cloth to prevent possible

heat damage to the valve core and opening port.

4. Install a field-provided filter dryer as close as possible

to the expansion device,

Use 10ACE units in either TXV systems or fixed orifice sys-

tems, See the Lennox Engineering Handbook for ap-

proved TXV and fixed orifice match-ups and application in-

formation. Table 2 lists the unit liquid and vapor line sizes

and corresponding line sets,

Fixed Orifice Systems

10ACE units are shipped with a fixed orifice refrigerant me-

tering device. Replace the existing indoor unit fixed orifice

with the orifice supplied with the outdoor unit. Place the

supplied fixed orifice sticker on the indoor cabinet after

installation. See table 3 for the fixed orifice size for each

unit, In nonstandard applications, the provided fixed orifice

may not be appropriately sized. Refer to the Engineering

Handbook for specific orifice information.

Table 3

Fixed Orifice Drill Sizes

Fixed Orifice Fixed Orifice

Unit Catalog # Drill Size

10ACE-024 100484-12 .062

10ACE-036 100484-22 .073

10ACE-048 100484-33 .086

10ACE-060 100484-44 .098

Install the fixed orifice as shown in figure 5, Do not twist the

cap tubes when loosening the seal nut from the orifice

housing,

II Metering Device Installation

_oO-RING j FIXED ORIFICE

| or

_'-_ f-_-_ EXPANSION VALVE &

// _ _ O-RING (See NOTE)

DISTRIBUTOR _i_(_ LIQUID LINESTUB

STRAINER

NOTE -If installing expansion valve with an indoor coil

that includes a fixed orifice, remove orifice before

installing valve,

Figure 5

Expansion Valve Systems

Expansion valves equipped with Chatleff fittings are avail-

able from Lennox, Refer to the Engineering Handbook for

expansion valves for use with specific match-ups.

505128M 03/06

Page 4

If you install a expansion valve with an indoor coil that

includes a fixed orifice, remove the orifice before the

expansion valve is installed.

AIMPORTANT

When checking the unit charge, use a manifold gauge set

that is equipped with "low loss" hoses. Do not use a man-

ifold gauge set with anything other than a "low loss" hose.

The service valves (liquid line - figure 6, vapor line - figures

7 and 8) and gauge ports are used for leak testing, eva-

cuating, charging and checking charge, Each valve is

equipped with a service port which has a factory-installed

Schrader valve. A service port cap protects the Schrader

valve from contamination and serves as the primary leak

seal.

To Access Schrader Port:

1. Remove service port cap with an adjustable wrench.

2. Connect gauge to the service port,

3, When testing is complete, replace service port cap.

Tighten finger tight, then torque per table 1 (Page 2).

To Open Front-Seated Service Valves:

1, Remove stem cap with an adjustable wrench,

2. Use a service wrench with a hex-head extension

(3/16" for liquid-line valve sizes; 5/16" for vapor-line

valve sizes) to back the stem out counterclockwise as

far as it will go,

3, Replace the stem cap. Tighten finger tight, then torque

per table 1 (Page 2).

To Close Front-Seated Service Valves:

1. Remove the stem cap with an adjustable wrench,

2. Use a service wrench with a hex-head extension

(3/16" for liquid-line valve sizes; 5/16" for vapor-line

valve sizes) to turn the stem clockwise to seat the

valve. Tighten it firmly,

3. Replace the stem cap, Tighten finger tight, then torque

per table 1 (Page 2),

Vapor Line Ball Valve

Ball-type service valve (10ACE-060 only, figure 8) func-

tions the same way as the other valves but cannot be re-

built; if one fails, replace with a new valve, The ball valve is

equipped with a service port with a factory-installed

Schrader valve. A service port cap protects the Schrader

valve from contamination and assures a leak-free seal.

Front-Seated Liquid Line Service Valve

STEM INSERT HEX

SCHRADER CAP

VALVE]OPENTO WRENCHHERE

L,NESETWHEN

VALVE IS CLOSED

(FRONT SEATED)] _

OUT-

DOOR

COl

OR

SERVICE

PORT CAP (VALVE FRONT-SEATED)

Valve in closed position Valve in open position

Figure 6

Front-Seated Vapor Line Service Valve

STEM CAP

SCHRADER VALVE

[OPEN TO LINE SET

INSERT WHEN VALVE IS

HEX CLOSED (FRONT

WRENCH SEATED)]

HERE

SERVICE

PORT CAP

TO

OUTDOOR r

COIL , SERVICE PORT

INDOOR

COIL

(VALVE

FRONT-SEATED)

Valve in closed position Valve in open position

Figure 7

Bali-Type Vapor Valve (Valve Closed)

sl M TO

OUTDOOR

COIL

USE ADJUSTABLE WRENCH STEM

TO OPEN: ROTATE STEM

COUNTER-CLOCKWISE 90 °.

TO CLOSE: ROTATE STEM

CLOCKWISE 90 ° .

CLOSED)

SERVICE PORT

TO (_SCHRADER VALVE

INDOOF

COIL SERVICE

PORT CAP

Figure 8

Page 5

10ACE SERIES

After the line set has been connected to the indoor and out-

door units, check the line set connections and indoor unit

for leaks,

,WARNING I

4. Connect a cylinder of nitrogen with a pressure regulat-

ing valve to the center port of the manifold gauge set,

5. Connect the manifold gauge set high pressure hose to

the vapor valve service port. (Normally, the high pres-

sure hose is connected to the liquid line port; however,

connecting it to the vapor port better protects the man-

ifold gauge set from high pressure damage,)

6. Adjust the nitrogen pressure to 150 psig (1034 kPa).

Open the valve on the high side of the manifold gauge

set which will pressurize line set and indoor unit.

7. After a few minutes, open a refrigerant port to ensure

the refrigerant you added is adequate to be detected.

(Amounts of refrigerant will vary with line lengths.)

Check all joints for leaks. Purge nitrogen and

HCFC-22 mixture. Correct any leaks and recheck.

WARNING

AWARNING

I

I

Evacuating the system of noncondensables is critical for

proper operation of the unit. Noncondensables are defined

as any gas that will not condense under temperatures and

pressures present during operation of an air conditioning

system. Noncondensables and water vapor combine with

refrigerant to produce substances that corrode copper pip-

ing and compressor parts.

AIMPORTANT

WARNING I

Using an Electronic Leak Detector or Halide

1, Connect a cylinder of HCFC-22 to the center port of

the manifold gauge set.

2, With both manifold valves closed, open the valve on

the HCFC-22 cylinder (vapor only).

3, Open the high pressure side of the manifold to allow

the HCFC-22 into the line set and indoor unit. Weigh

in a trace amount of HCFC-22, [A trace amount is a

maximum of 2ounces (57 g) or 3 pounds (31 kPa)

pressure,] Close the valve on the HCFC-22 cylinder

and the valve on the high pressure side of the manifold

gauge set, Disconnect the HCFC-22 cylinder,

1. Connect manifold gauge set to the service valve ports

as follows:

• low pressure gauge to vapor line service valve

• high pressure gauge to liquid line service valve

2. Connect micron gauge,

3. Connect the vacuum pump (with vacuum gauge) to

the center port of the manifold gauge set,

4. Open both manifold valves and start the vacuum

pump.

5. Evacuate the line set and indoor unit to an absolute

pressure of 23,000 microns (29.01 inches of mercu-

ry). During the early stages of evacuation, it is desir-

able to close the manifold gauge valve at least once to

determine if there is a rapid rise in absolute pressure.

A rapid rise in pressure indicates a relatively large

leak, If this occurs, repeat the leak testing procedure.

NOTE -The term absolute pressure is defined as the

total actual pressure within a given volume or system,

above the absolute zero of pressure, Absolute pres-

sure in a vacuum is equal to atmospheric pressure mi-

nus vacuum pressure,

6. When the absolute pressure reaches 23,000 microns

(29.01 inches of mercury), close the manifold gauge

valves, turn off the vacuum pump and disconnect the

manifold gauge center port hose from vacuum pump.

Attach the manifold center port hose to a nitrogen cyl-

inder with pressure regulator set to 150 psig (1034

kPa) and purge the hose. Open the manifold gauge

valves to break the vacuum in the line set and indoor

unit, Close the manifold gauge valves.

505128M 03/06

Page 6

,A CAUTION

AIMPORTANT

7. Shut off the nitrogen cylinder and remove the manifold

gauge hose from the cylinder. Open the manifold

gauge valves to release the nitrogen from the line set

and indoor unit.

8. Reconnect the manifold gauge to the vacuum pump,

turn the pump on, and continue to evacuate the line set

and indoor unit until the absolute pressure does not

rise above 500 microns (29.9 inches of mercury) within

a 20-minute period after shutting off the vacuum pump

and closing the manifold gauge valves.

9. When the absolute pressure requirement above has

been met, disconnect the manifold hose from the vac-

uum pump and connect it to an upright cylinder of

HCFC-22 refrigerant. Open the manifold gauge valves

to break the vacuum from 1 to 2 psig positive pressure

in the line set and indoor unit. Close manifold gauge

valves and shut off the HCFC-22 cylinder and remove

the manifold gauge set.

1. Rotate the fan to check for frozen bearings or binding.

2. Inspect all factory- and field-installed wiring for loose

connections.

3. After evacuation is complete, open the liquid line and

vapor line service valves to release refrigerant charge

(contained in outdoor unit) into the system.

4. Replace the stem caps and secure finger tight, then

tighten an additional one-sixth (1/6) of a turn.

5. Check voltage supply at the disconnect switch. The

voltage must be within the range listed on the unit's

nameplate. If not, do not start the equipment until you

have consulted the power company and the voltage

condition has been corrected.

6. Set the thermostat for a cooling demand. Turn on pow-

er to the indoor blower and close the outdoor unit dis-

connect switch to start the unit.

7. Recheck voltage while the unit is running. Power must

be within range shown on the nameplate.

Page 7

10ACE SERIES

Units are factory charged with the amount of HCFC-22 re-

frigerant indicated on the unit nameplate. This charge is

based on a matching indoor coil and outdoor coil with a 15

ft. (4.6 m) line set. For varying lengths of line set, refer to

table 4 for refrigerant charge adjustment check.

Table 4

Refrigerant Charge per Line Set Lengths

Liquid Line Oz. per 5 ft. (g per 1.5 m) adjust

Set Diameter from 15 ft. (4.6 m) line set*

5/16 in. (8 mm) 2 ounce per 5 ft. (57 g per 1.5 m)

3/8 in. (9.5 mm) 3 ounce per 5 ft. (85 g per 1.5 m)

NOTE - *If line length is greater than !5 ft. (4.6 m), add this amount. If

line length is less than 15 ft. (4.6 m), subtract this amount.

The outdoor unit should be charged during warm weather.

However, applications arise in which charging must occur

in the colder months. The method of charging is deter-

mined by the unit's refrigerant metering device and the

outdoor ambient temperature.

Measure the liquid line temperature and the outdoor ambi-

ent temperature as outlined below:

1. Connect the manifold gauge set to the service valves:

• low pressure gauge to vapor valve service port

• high pressure gauge to liquid valve service port

2. Connect the center manifold hose to an upright cylin-

der of HCFC-22. Close manifold gauge set valves.

3. Set the room thermostat to call for heat. This will

create the necessary load for properly charging the

system in the cooling cycle.

4. Use a digital thermometer to record the outdoor ambi-

ent temperature.

5. When the heating demand has been satisfied, switch

the thermostat to cooling mode with a set point of 68 _F

(20_%). When pressures have stabilized, use a digital

thermometer to record the liquid line temperature.

6. The outdoor temperature will determine which charg-

ing method to use. Proceed with the appropriate

charging procedure.

Charge Using Weigh-in Method (Fixed Orifice/

TXV Systems) -Outdoor Temp. <65°F (18°C)

If the system is void of refrigerant, or if the outdoor ambient

temperature is cool, use the weigh-in method to charge the

unit. Do this after any leaks have been repaired.

1. Recover the refrigerant from the unit.

2. Conduct a leak check, then evacuate as previously

outlined.

3. Weigh in the charge according to the total amount

shown on the unit nameplate,

If weighing facilities are not available or if you are charging

the unit during warm weather, follow one of the other pro-

cedures outlined below,

Charge Using Subcooling Method (Fixed

Orifice Systems) -Outdoor Temp. >_65°F (18°C)

If you charge a fixed orifice system when the outdoor ambi-

ent is 65 _F (18 _C) or above, use the subcooling method to

charge the unit.

1. With the manifold gauge hose still on the liquid service

port and the unit operating stably, use a digital

thermometer to record the liquid line temperature.

2. At the same time, record the liquid line pressure reading.

3. Use a temperature/pressure chart for R-22 to

determine the saturation temperature for the liquid line

pressure reading.

4. Subtract the liquid line temperature from the saturation

temperature (according to the chart) to determine

subcooling.

Saturation Temperature °F (°C)

-- = Liquid Line Temperature °F (°C)

= Subcooling Value °F (°C)

5. Compare the subcooling value with those in table 5. If

subcooling is greater than shown, recover some

refrigerant. If subcooling is less than shown, add some

refrigerant.

Table 5

Subcooling Values for Fixed Orifice Systems

Outdoor Liquid Subcooling _1"F (.6 C)]

Temp.

°F (°C) 10ACE-24 10ACE-36 10ACE-48 1OACE-60

65 (18) 10 (5.6) 17 (9.5) 15 (8.3) 14 (8)

70 (21) 9 (5) 17 (9.5) 14 (8) 15 (8.3)

75 (24) 8 (4.5) 16 (9) 13 (7) 15 (8.3)

80 (27) 7 (3.9) 15 (8.3) 13 (7) 14 (8)

85 (29) 6 (3.3) 14 (8) 12 (6.7) 14 (8)

90 (32) 5 (2.8) 14 (8) 12 (6.7) 13 (7)

95 (35) 4 (2.2) 12 (6.7) 12 (6.7) 13 (7)

100 (38) 4 (2.2) 11 (6) 11 (6) 12 (6.7)

105 (41) 3 (1.7) 10 (5.6) 10 (5.6) 12 (6.7)

110 (43) 3 (1.7) 9 (5) 9 (5) 11 (6)

115 (45) 2 (1.1) 8 (4.5) 8 (4.5) 10 (5.6)

505128M 03/06

Page 8

Charge Using Approach Method (TXV Systems)

- Outdoor Temperature >65°F (18°C)

The following procedure is intended as a general guide and

is for use on expansion valve (TXV) systems only. For best

results, indoor temperature should be 70°F (21°C) to 80°F

(26°C). Monitor system pressures while charging.

1. Record outdoor ambient temperature using a digital

thermometer.

2. Attach high pressure gauge set and operate unit for

several minutes to allow system pressures to stabilize.

3. Compare stabilized pressures with those provided in

table 7, "Normal Operating Pressures."

AIMPORTANT

NOTE -For best results, use the same digital ther-

mometer to check both outdoor ambient and fiquid

temperatures.

4, Check the liquid line temperature. The difference be-

tween the ambient and liquid temperatures should

match values given in table 6, Loss of charge results

in low capacity and efficiency.

5, If the values do not agree with the those in table 6, add

refrigerant to lower the approach temperature, or re-

cover refrigerant from the system to increase the ap-

proach temperature,

Table 6

Approach Values

10ACEMode,I -024I -030I -048I -000

Temp. °F(°C) [18 (10) [11 (6) [8(4.5) [13 (7)

Approach Value is the Liquid Line Temperature minus Outdoor Ambi-

ent Temperature °F (°C) + I°F (0.5°C)

Table 7

Normal Operating Pressures*

10ACE-024 10ACE-036 10ACE-048 10ACE-060

Temp°F LiqlsucLiqlsucLiqlsucLiqlsu°

Expansion Valve

65(18) 163 70 162 70 159 71 170 74

75 (24) 193 71 187 74 188 72 261 76

85 (29) 225 72 219 75 220 73 234 77

95 (35) 260 73 253 77 251 76 270 79

105 (41) 298 74 291 79 290 77 309 79

110 _3) 318 75 316 80 309 78 331 80

115 _5) 338 75 329 81 328 79 351 81

Fixed Orifice

65(18) 165 63 168 67 163 68 189 72

75 (24) 194 67 195 71 190 71 203 74

85(29) 224 70 224 75 220 74 233 77

95 (35) 257 73 255 78 251 77 265 79

105 (41) 293 76 289 82 288 79 301 82

110 _3) 313 78 305 83 307 80 319 83

115 _5) 332 79 324 84 325 82 339 84

* Values shown are typical pressures (in. psig +2psig); indoor unit

match up, indoor air quality equipment, and indoor load will cause

the pressures to vary.

** Temperature of the air entering the outside coil.

Page 9

10ACE SERIES

The outdoor unit and indoor blower cycle on demand from

the room thermostat. When the thermostat blower switch

is in the ON position, the indoor blower operates continu-

ously.

NOTE -Whfe residue may surface on guards and grilles

of outdoor units. This is caused by mild acids present in

minute quantities in the plasticizer applied to make the

coating flexible. The residue is comprised of non-toxic,

common fatty acids found in natural animal and vegetable

otis, and can be removed by wiping the parts with a cloth.

Once outside, and over time, the rain will wash off any re-

maining residue.

Maintenance and service must be performed by a qualified

installer or service agency. At the beginning of each cool-

ing season, the system should be checked as follows:

WARNÁNG I

1. Clean and inspect the outdoor coil. The coil may be

flushed with a water hose. Make sure power is off be-

fore cleaning,

The outdoor coil is protected by an inner mesh screen

and a wire cage (see figure 9).

Figure 9

•6 pins

PUSH PIN

MESH SCREEN

If debris has collected between the mesh screen and

the coil and cannot be dislodged by spraying unpres-

surized water from the inside coil surface to the out-

side, the mesh may be removed by first removing the

top of the unit which will allow for removal of the wire

cage.

Then, using pliers to grip the head of the push pins, pull

straight out to extract the push pins along one side of

the coil, If necessary, remove the push pins along the

back of the unit; it is usually unnecessary to fully re-

move the inner mesh screen,

Drape the mesh screen back and wash the coil. When

all the debris has been removed from the coil, reinstall

the mesh screen by positioning it in its original position

and reinserting the push pin. No tool is required to

push the pin back into the same slot in the fins,

If the push pin is loose and tends not to stay in place,

brush the fins with a 22 fpi fin brush (except model

-024, 18 fpi), Line up the push pin a couple fins to the

right or left of the original hole and re-insert the pin,

2, Condenser fan motor is prelubricated and sealed, No

further lubrication is needed.

3, Visually inspect connecting lines and coils for evi-

dence of oil leaks,

4. Check wiring for loose connections.

5, Check for correct voltage at unit (unit operating),

6, Check amp-draw condenser fan motor,

Unit nameplate Actual

NOTE -If the owner reports insufficient cooling, the

un# should be gauged and the refrigerant charge

should be checked. Refer to the charging section in

this instruction.

Indoor Coil

1. Clean coil, if necessary.

2. Check connecting lines and coils for evidence of oil

leaks.

3. Check the condensate pan line and clean it if neces-

sary.

Indoor Unit

1, Clean or change filters,

2. Adjust blower speed for cooling, Measure the pressure

drop over the coil to determine the correct blower CFM

Refer to the unit information service manual for pressure

drop tables and procedure,

3. Belt Drive Blowers - Check belt for wear and proper

tension,

4, Check all wiring for loose connections

5. Check for correct voltage at unit (blower operating).

6. Check amp-draw on blower motor

Unit nameplate Actual

505128M 03/06

Page 10

RefertotheEngineeringHandbookforoptionalaccesso-

riesthatmayapplytothisunit,Thefollowingmayormay

notapply:

• LossofChargeKit

• HighPressureSwitchKit

• CompressorMonitor

• CompressorCrankcaseHeater(standardon4 and5

tonunits)

• HailGuards

• MountingBases

• TimedOffControl

• Stand-offKit

• SoundCover

• LowAmbientKit

JobName

JobLocation

Installer

UnitModelNo,

NameplateVoltage

RatedLoadAmpacity

SerialNo.

Jobno. Date

City State

City State

ServiceTechnician

Compressor OutdoorFan

MaximumFuseorCircuitBreaker

ElectricalConnectionsTight? [] IndoorFilterclean?[]

IndoorBlowerRPM__ S,RDropOverIndoor(Dry)

DischargePressure VaporPressure

RefrigerantLines:- LeakChecked?[] ProperlyInsulated?[]

ServiceValves: --- FullyOpened? [] CapsTight? []

VoltageWithCompressorOperating

SupplyVoltage(UnitOff)

OutdoorCoilEnteringAirTemp.

RefrigerantChargeChecked?

OutdoorFanChecked?

Thermostat

Calibrated?[] ProperlySet?[]

[]

[]

Level? []

Page 11

10ACE SERIES

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