LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0806500

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

Open the PDF directly: View PDF .
Page Count: 28

,?c ' ' •

2008 lennox Industr_es Inc

Datias, Texas, USA

INSTALLATION

INSTRUCTIONS

S'ClassTM SPB*H4 Units

SPB036H4S41, SPB048H4S41 and

SPB060H4S41

HEAT PUMPS _ Technical

505,330M LLL[ Publications

02/08 Litho U.S.A.

Supersedes 06/07

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

Xk WARNING

CAUTION

IMPORTANT

Shipping and Packing List ...................... 1

SPB*H4 Outdoor Unit .......................... 1

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

General Information ........................... 3

Recovering Refrigerant from Existing System ..... 5

Removing Existing Outdoor Unit ................. 6

Positioning New Outdoor Unit ................... 6

Removing and Installing Panels ................. 7

New or Replacement Line Set ................... 9

Brazing Connections ........................... 10

Removing Indoor Unit Metering Device ........... 11

Flushing the System ........................... 12

Installing New Indoor Unit Metering Device ........ 13

Testing for Leaks .............................. 13

Evacuating the System ......................... 15

Servicing Unit Delivered Void of Charge ........... 16

Electrical Connections ......................... 16

Start-Up and Charging Procedures ............... 18

System Operation ............................. 21

Defrost System ............................... 21

Maintenance .................................. 26

Optional Accessories .......................... 26

Owner Information ............................. 27

Thermostat Operation .......................... 28

Start-Up and Performance Checklist ............. 28

Check unit for shipping damage. Consult last carrier

immediately if damage is found.

1 -Assembled SPB*H4 outdoor unit

IMPORTANT

The SPB*H4 Heat Pumps, which will also be referred to in

this instruction as the outdoor unit, uses HFC-410A

refrigerant. This outdoor unit must be installed with a

matching indoor unit and line set as outlined in the Lennox

SPB*H4 Engineering Handbook.

This outdoor unit is designed for use in systems that use

check thermal expansion valve (CTXV) refrigerant

metering devices.

02/08

IIIHIIIIIIIIIIIHIIIIIIIIIIIIIIIIII Page 1 505,330M

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

RUN

CAPACITOR

DEFROST

BOARD OUTDOORFAN

CONTACTOR COMPRESSOR

TOP VIEW

SUCTION LINE

• CONNECTION

LIQUID LINE

CONNECTION

REVERSING HIGH PRESSURE

VALVE SWITCH

FILTER DRIER/ VAPOR LINE

LIQUID LINE

CONNECTIONS

VAPOR VALVE AND

GAUGE PORT/SUCTION

LINE CONNECTIONS

SPB*H4 PARTS ARRANGEMENT

DISCHARGE AIR t D

LIQUID LINE

-_ --CONNECTION

ELECTRICAL

INLETS

/V VAPORLINE

JCONNECTION

4_1/4(1 4_8/4

08) (121)

i i t t

SIDE VIEW

0N'TSUPPORTFEET\ __FO

13-7/8

(352) @ @ @

7-3/4

(197)

3-1/4

(83) (689)

i: ° :j

2 (51)

1 (25)

I I i i

SIDE VIEW

-T

20-5/8

(524)

4-1/2

(114)

--T

3-5/8

(92)

BASE WITH ELONGATED LEGS

Model A B C D E F G H I J

SPB*H4-036 35 (889) 30-1/2 (775) 35 (889) 17-5/8 (448) 8-3/4 (222) 18 (457) 9 (229) 8-1/2 (216) 9 (229) 11-1/2 (292)

SPB*H4-048 45 (1143) 30-1/2 (775) 35 (889) 27-5/8 (702) 8-3/4 (222) 18 (457) 9 (229) 11-1/2 (292) 9 (229) 11-1/2 (292)

SPB*H4-060 39 (991) 30-1/2 (775) 35 (889) 27-5/8 (702) 11 (222) 18 (457) 10-1/2 (267) 13-1/2 (343) 10-1/2 (267) 13-1/2 (343)

505330M 02/08

Page 2

WARNING OPERATING SERVICE VALVES

The liquid and vapor line service valves are used for

removing refrigerant, flushing, leak testing, evacuating,

checking charge and charging,

Each valve is equipped with a service port which has a

factory-installed valve stem.

IMPORTANT

These instructions are intended as a general guide and do

not supersede 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.

Table 1. Torque Requirements

Parts Recommended Torque

Service valve cap 8 ft.- lb. 11 NM

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. 11 NM

USING MANIFOLD GAUGE SETS

When checking the system charge, only use a manifold

gauge set that features low loss anti-blow back fittings.

See figure 2 for a typical manifold gauge connection setup,

Manifold gauge sets used with HFC-410A refrigerant

systems must be capable of handling the higher system

operating pressures. The gauges should be rated for use

with pressures of 0 - 800 on the high side and a low side of

30" vacuum to 250 psi with dampened speed to 500 psi.

Gauge hoses must be rated for use at up to 800 psi of

pressure with a 4000 psi burst rating,

I/6 TURN 1/12 TURN

8 4

Figure 1Cap Tightening Distances

IMPORTANT

To Access Angle-Type Service Port:

A service port cap protects the service port core from

contamination and serves as the primary leak seal,

1. Remove service port cap with an appropriately sized

wrench.

2. Connect gauge to the service port,

3. When testing is completed, replace service port cap and

tighten as follows:

•With Torque Wrench: Finger tighten and then

tighten per table 1,

• Without Torque Wrench: Finger tighten and use an

appropriately sized wrench to turn an additional

1/6 turn clockwise as illustrated in figure 1.

Page 3

SPB*H4 SERIES

DISTRIBUTOR

CBECK REV S' :UV E

EXPANSION VALVE _ \

DR,ER O% tOR "-

LOW HIGH MUFFLER

PRESSURE PRESSURE ___ ]

;g2 ° V'A;°2

_ CHECK EXPANSION VALVE --

NOTE - ARROWS INDICATE DIRECTION

OF REFRIGERANT FLOW.

INDOOR UNIT

INDOOR

COIL

Figure 2. Typical Manifold Gauge Connection Setup

ToOpen and CloseAngle-TypeServiceValve:

A valve stem cap protects the valve stem from

contamination and assures a leak-free seal.

1. Remove stem cap with an appropriately sized wrench.

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

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

vapor-line valve sizes) to back the stem out

counterclockwise as far as it will go.

3. Replace the stem cap and tighten as follows:

•With Torque Wrench: Tighten finger tight and then

tighten per table 1.

• Without Torque Wrench: Finger tighten and use an

appropriately sized wrenched to turn an additional

1/12 turn clockwise as illustrated in figure 1.

SERVICE PORT

CAP_-_

_L_ SERVICE PORT

SERVICE PORT /"

CORE (VALVESTEMSBOWN

I _ //_/_ _ _ CLOSED) INSERT HEX

WRENCH HERE

FRONT-SEATED

TO INDOOR

UNIT

TO OUTDOOR UNIT J J CLOSED TO BOTH INDOOR

AND OUTDOOR UNITS

Figure 3. Angle-Type Service Valve

(Font-Seated Closed)

NOTE -A label with specific torque requirements may be

affixed to the stem cap. If the label is present, use the

specified torque.

NOTE- To prevent stripping of the cap, the wrench should

be appropriately sized and fit snugly over the cap before

tightening the cap.

SERVICE PORT CAP

SERVICE PORT SERVICE PORT

CORE

OPEN TO BOTH (VALVE STEM SHOWN OPEN)

INDOOR AND INSERT HEX WRENCH HERE

OUTDOOR UNITS

TO INDOOR

UNIT

STEM CAP

TO OUTDOOR UNIT

Figure 4. Angle-Type Service Valve

(Back-Seated Opened)

To Access Bali-Type Service Port:

A service port cap protects the service port core from

contamination and serves as the primary leak seal.

1. Remove service port cap with an appropriately sized

wrench.

2. Connect gauge to the service port.

3. When testing is completed, replace service port cap and

tighten as follows:

•With Torque Wrench: Finger tighten and then

tighten per table 1.

•Without Torque Wrench: Finger tighten and use an

appropriately sized wrench to turn an additional

1/6 turn clockwise as illustrated in figure 1.

505330M 02/08

Page 4

OPEN TO LINE SET WHEN VALVE IS CLOSED,

TO BOTH LINE SET AND UNIT WHEN VALVE IS

OPEN.

TO OPEN ROTATE STEM

COUNTERCLOCKWISE 90° .

TO CLOSE ROTATE STEM

CLOCKWISE 90 ° .

TO INDOOR UNIT

BALL (SHOWN

CLOSED)

VALVE

STEM

CORE

SERVICE PORT CAP

TO OUTDOOR UNIT STEM CAP

Figure 5. Bali-Type Service Valve

ToOpen and Close Bali-TypeServiceValve:

A valve stem cap protects the valve stem from

contamination and assures a leak-free seal.

1. Remove stem cap with an appropriately sized wrench.

2. Use an appropriately sized wrenched to open. To open

valve, roate stem counterclockwise 90°, To close

rotate stem clockwise 90°.

3. Replace the stem cap and tighten as follows:

•With Torque Wrench: Finger tighten and then

tighten per table 1.

• Without Torque Wrench: Finger tighten and use an

appropriately sized wrench to turn an additional

1/12 turn clockwise as illustrated in figure 1.

NOTE -A label with specific torque requirements may be

affixed to the stem cap. If the label is present, use the

specified torque.

Remove existing HCFC-22 refrigerant using one of the

following procedures:

METHOD 1:

If the existing outdoor unit is not equipped with shut-off

valves, or if the unit is not operational and you plan to use

the existing HCFC-22 to flush the system.

NOTE -Use recovery machine instructions for specific

setup requirements.

1. Disconnect all power to the existing outdoor unit.

2. Connect to the existing unit a gauge set, clean

recovery cylinder and a recovery machine. Use the

instructions provided with the recovery machine on

how to setup the connections.

3. Remove all HCFC-22 refrigerant from the existing

system. Check gauges after shutdown to confirm that

the entire system is completely void of refrigerant.

RECOVERY MACHINE MANIFOLD GAUGES

OUTDOOR UNIT

Figure 6. Typical Refrigerant Recovery

(Method 1)

NOTE -Use recovery machine instructions for specific

setup requirements.

METHOD 2:

Use this method if the existing outdoor unit is equipped

with manual shut-off valves, and plan on using new

HCFC-22 refrigerant to flush the system.

IMPORTANT: Some system configurations may contain

higher than normal refrigerant charge due to either large

internal coil volumes, and/or long line sets. The following

conditions may cause the compressor to stop functioning:

The following devices could prevent full system charge

recovery into the outdoor unit:

• Outdoor unit's high or low-pressure switches (if

applicable) when tripped can cycled the compressor

OFF.

• Compressor can stop pumping due to tripped internal

pressure relief valve.

• Compressor has internal vacuum protection that is

designed to unload the scrolls (compressor stops

pumping) when the pressure ratio meets a certain

value or when the suction pressure is as high as 20

psig. (Compressor suction pressures should never be

allowed to go into a vacuum. Prolonged operation at

low suction pressures will result in overheating of the

scrolls and permanent damage to the scroll tips, drive

bearings and internal seals).

Once the compressor can not pump down to a lower

pressure due to one of the above system conditions, shut

off the suction valve. Turn OFF the main power to unit and

use a recovery machine to recover any refrigerant left in

the indoor coil and line set.

Perform the following task:

1. Start the existing HCFC-22 system in the cooling

mode and close the liquid line valve.

2. Pump as much of the existing HCFC-22 refrigerant

with the compressor back into the outdoor unit until

you have reached the limitations of the outdoor

system. Turn the outdoor unit main power OFF and

use a recovery machine to remove the remaining

refrigerant in the system.

Page 5

SPB*H4 SERIES

NOTE -It may be necessary to bypass the low pressure

switches if equipped to ensure complete refrigerant

evacuation.

3, When the low side system pressures reach 0 psig,

close the suction line valve,

4. Check gauges after shutdown to confirm that the

valves are not allowing refrigerant to flow back into the

low side of the system.

Perform the following task at the existing outdoor unit:

• Disconnect line set at the service valves,

• Disconnect electrical service at the disconnect switch,

• Remove old outdoor unit,

CAUTION

See Unit Dimensions on page 3 for sizing mounting slab,

platforms or supports, Refer to figure 7 for mandatory

installation clearance requirements,

CONTROL PANEL

ACCESS LOCATION

* SEE NOTES BELOW THIS FIGURE FOR FURTHER DETAILS.

Figure 7. Installation Clearances

NOTES:

• Service clearance of 30 in. (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

in. (914 mm).

• Clearance to one of the remaining two sides may be

12 in, (305 mm) and the final side may be 6 in, (152

mm)"

• 48 in. (1219 mm) clearance required on top of unit.

• A clearance of 24 in, (610 mm) must be maintained

between two units.

POSITIONING CONSIDERATIONS

Consider the following when positioning the unit:

• Some localities are adopting sound ordinances based

on the unit's sound level registered from the adjacent

property, not from the installation property. Install the

unit as far as possible from the property line,

When possible, do not install the unit directly outside

a window. Glass has a very high level of sound

transmission, For proper placement of unit in relation

to a window see the provided illustration in figure 8,

,NSTALLUN,TAWAY

FROM II --

Figure 8. Outside Unit Placement

PLACING UNIT ON SLAB

When installing unit at grade level, the top of the slab

should be high enough above grade so that water from

higher ground will not collect around the unit. The slab

should have a slope tolerance as described in figure 9,

NOTE -If necessary for stability, anchor un# to slab as

described in Stabilizing Unit on Uneven Surfaces on page

INSTALL UNIT LEVEL OR, IF ON A SLOPE, MAINTAIN SLOPE TOLERANCE OF 2

DEGREES (OR 2 INCHES PER 5 FEET [80 MM PER 1.5 M]) AWAY FROM BUILDING

STRUCTURE. __L

JBUILDING

STRUCTURE _ iT

Z-

• _ I !_' .m.._l,..._:__--L-

Figure 9. Slab Mounting at Ground Level

505330M 02/08

Page 6

ELEVATINGTHEUNIT

Unlikethesmall-baseunitswhichuseroundsupportfeet,

thelarger-baseunitsareoutfittedwithelongatedsupport

feetasillustratedinfigure10whichusesasimilarmethod

for elevatingtheunit,

If additionalelevationis necessary,raisethe unit by

extendingthelengthoftheunitsupportfeet.Thismaybe

achievedbyusinga2"SCH40femalethreadedadapter,

Thespecifiedcouplingwillfit snugglyintotherecessed

portionofthefeet,Useadditional2"SCH40malethreaded

adaptorswhichcanbethreadedintothefemalethreaded

adaptorstomakeadditionaladjustmentstothelevelofthe

unit,

NOTE -Keep the height of extenders short enough to

ensure a sturdy installation, If it is necessary to extend

further, consider a different type of field-fabricated

framework that is sturdy enough for greater heights,

BASE

LEG DETAIL

2" (50.8MM) SCH 40

FEMALE THREADED

ADAPTER

Figure 10. Elevated Slab Mounting using

Feet Extenders (Larger Base Units)

ROOF MOUNTING

Install unit at a minimum of four inches above the surface

of the roof. Care must be taken to ensure weight of unit is

properly distributed over roof joists and rafters. Either

redwood or steel supports are recommended,

CAUTION

REMOVING PANELS

Remove the Iouvered panels as follows:

1. Remove two screws, allowing the panel to swing open

slightly as illustrated in figure 11,

NOTE -Hold the panel firmly throughout this procedure

2. Rotate bottom corner of panel away from hinge corner

post until lower three tabs clear the slots as illustrated

in figure 11, detail B.

3. Move panel down until lip of upper tab clears the top

slot in corner post as illustrated in figure 11, detail A.

INSTALLING PANEL

Install the Iouvered panels as follows:

1. Position the panel almost parallel with the unit as

illustrated in figure 12, detail D with the screw side as

close to the unit as possible.

2. With a continuous motion slightly rotate and guide the

lip of top tab inward as illustrated in figure 11, details

A and C, then upward into the top slot of the hinge

corner post.

3, Rotate panel to vertical to fully engage all tabs,

4. Holding the panel's hinged side firmly in place, close

the right-hand side of the panel, aligning the screw

holes.

5. When panel is correctly positioned and aligned, insert

the screws and tighten.

Page 7

SPB*H4 SERIES

PANELSHOWNSLIGHTLYROTATEDTOALLOWTOPTABTOEXIT(ORENTER)

TOPSLOTFORREMOVING(ORINSTALLING)PANEL.

LIP

DETAIL A

DETAIL B

ROTATE IN THIS DIRECTION;

THEN DOWN TO REMOVE

PANEL

-- DETAIL C

IMPORTANT! DO NOT ALLOW PANELS TO HANG

ON UNIT BY TOP TAB. TAB IS FOR ALIGNMENT

AND NOT DESIGNED TO SUPPORT WEIGHT OF

PANEL.

Figure 11. Removing/Installing Louvered

Panels (Details A, B and C)

MAINTAIN MINIMUM PANEL ANGLE (AS CLOSE TO PARALLEL WITH THE UNIT

AS POSSIBLE) WHILE INSTALLING PANEL.

HOLD DOOR FIRMLY TO THE HINGED

X% M AYBETOO __-------__ FOL , %O E NTAT ,,S

PREFERRED ANGLE "__

FOR,NSTALLAT,ON

Figure 12. Removing/Installing Louvered

Panels (Detail D)

STABILIZING UNIT ON UNEVEN SURFACES

To help stabilize an outdoor unit, some installations may

require strapping the unit to the pad using brackets and

anchors commonly available in the marketplace,

Slab Side Mounting

Deck Top

Mounting

STABILIZING BRACKET MINIMUM 1

(18 GAUGE METAL- 2" PER SIDE _

WIDTH; HEIGHT AS

REOD,;BENDTOFORM

FOR EXTRA

STABILITY

ONE BRACKET PER SIDE (MIN.); FOR EXTRA STABILITY,

2 BRACKETS PER SIDE, 2" FROM EACH CORNER.

Figure 13. Installing Stabilizer Brackets

With unit positioned at installation site, remove two side

Iouvered panels to expose the unit base pan. Install the

brackets as illustrated in figures 11 and 12 using

conventional practices; replace the panels after installation

is complete.

AIMPORTANT

505330M 02/08

Page 8

This section providesinformationon installationor

replacementof existinglineset.If linesetarenotbeing

installedthenproceedtoBrazing Connections on page 10.

If refrigerant lines are routed through a wall, seal and

isolate the opening so vibration is not transmitted to the

building. Pay close attention to line set isolation during

installation of any HVAC system. When properly isolated

from building structures (walls, ceilings, floors), the

refrigerant lines will not create unnecessary vibration and

subsequent sounds. Also, consider the following when

placing and installing a high-efficiency air conditioner.

REFRIGERANT LINE SET

Field refrigerant piping consists of liquid and suction lines

from the outdoor unit (braze connections) to the indoor unit

coil (flare or sweat connections). Use Lennox L15 (sweat,

non-flare) series line set, or use field-fabricated refrigerant

lines as listed in table 2.

Model

Table 2. Refrigerant Line Set

Field Connections

Liquid Suction Liquid

Line Line Line

-018

-024, 3/8". 7/8" 3/8"

-036 (10 ram) (22 ram) (10 ram)

-048

3/8". 1-1/8". 3/8"

-060 (10 ram) (29 ram) (10 ram)

Recommended Line Set

Suction L15 Line

Line Set

L15-65 15

7/8" ft, - 50 ft,

(22 ram) (4.6 m - 15

1-1/8" Field

(29 ram) Fabricated

NOTE -When installing refrigerant lines longer than 50

feet, see the Lennox Refrigerant Piping Design and

Fabrication Guidelines, or contact Lennox Technical

Support Product Applications for assistance. To obtain the

correct information from Lennox, be sure to communicate

the following points:

• Model (SPB*H4) and size of unit (e.g. -060).

• Line set diameters for the unit being installed as listed

in table 2 and total length of installation,

• Number of elbows and if there is a rise or drop of the

piping.

MATCHING WITH NEW OR EXISTING INDOOR COIL

AND LINE SET

The RFCl-metering line consisted of a small bore copper

line that ran from condenser to evaporator coil. Refrigerant

was metered into the evaporator by utilizing

temperature/pressure evaporation effects on refrigerant in

the small RFC line. The length and bore of the RFC line

corresponded to the size of cooling unit,

If the SPB*H4 is being used with either a new or existing

indoor coil which is equipped with a liquid line which served

as a metering device (RFCI), the liquid line must be

replaced prior to the installation of the SPB*H4 unit.

Typically a liquid line used to meter flow is 1/4" in diameter

and copper.

INSTALLING LINE SET

Line Set Isolation--This reference illustrates

procedures, which ensure proper refrigerant line set

isolation:

• Installation of a transition from horizontal to

vertical is illustrated in figure 14.

• Installation of line set on horizontal runs is

illustrated in figure 15,

• Installation of line set on vertical runs is illustrated in

figure 16.

AUTOMOTIVE

MUFFLER-TYPE HANGER

ANCHORED HEAVY NYLON

WIRE TIE OR AUTOMOTIVE \

MUFFLER-TYPE HANGER

WALL

STUD

X STRAP LIQUID LINE

TO SUCTION LINE

LIQUID LINE

kk SUCTION LINE - WRAPPED

METAL SLEEVE

IN ARMAFLEX

Figure 14. Refrigerant Line Set: Transition

from Vertical to Horizontal

STRAPPING MATERIAL

(AROUND SUCTION

LINE ONLY)

WIRE TIE (AROUND

SUCTION LINE

ONLY)

TAPE OR

WIRE TIE

8 FEET

STRAP THE SUCTION LINE TO

THE JOIST OR RAFTER AT 8 FEET

METAL INTERVALS THEN STRAP THE

SLEEVE LIQUID LINE TO THE SUCTION

TAPE OR LINE. /\

WIRE TIE

____'"'"'",',',11 I HI I,,,l

TO HANG LINE SET FROM JOIST OR RAFTER, USE EITHER METAL STRAPPING

MATERIAL OR ANCHORED HEAVY NYLON WIRE TIES.

Figure 15. Refrigerant Line Set: Installing

Horizontal Runs

Page 9

SPB*H4 SERIES

IMPORTANT_REFRIGERANTLINESMUSTNOTCONTACTWALL.

LIQUIDLINE

OUTSIDEWALL SUCTIONLINE

SLEEVE

WIRETIE

WOODBLOCK

STRAP

SUCTIONLINE

WRAPPEDWITH

ARMAFLEX

LIQUIDLINE

Figure 16. Refrigerant Line Set: Installing

Vertical Runs (New Construction Shown)

Use the following procedure to braze the line set to the new

air conditioner unit. Figure 17 is provided as a general

guide for preparing to braze the line set to the air

conditioner unit.

,WARNING

WARNING

CUT AND DEBUR

INDOOR UNIT

INSTALL CORE ONLY FOR

3OTH SERVICE PORTS after they

have coolED.

REMOVE CAP AND CORE FROM

BOTH LIQUID AND SUCTION

SERVICE PORTS

SERVICE PORT MUST BE

OPEN TO ALLOW EXIT

POINT FOR NITROGEN SERVICE

VALVE

LIQUtD LINE SERVICEJ

VALVE

outdoor

UNIT

FLOW NITROGEN

A:RAP

SER

VALVE

Figure 17. Brazing Connections

Page 10

505330M 02/08

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. Remove service cap and core from both the suction

and liquid line service ports.

3. Connect gauge low pressure side to liquid line service

valve,

4. To protect components during brazing, wrap a wet

cloth around the liquid line service valve body and

copper tube stub and use another wet cloth

underneath the valve body to protect the base paint,

Also, shield the light maroon R-410A sticker.

5. Flow regulated nitrogen (at 1 to 2 psig) through the

refrigeration gauge set into the valve stem port

connection on the liquid line service valve and out of

the valve stem port connection on the suction service

valve.

NOTE- The RFClV or TXV metering device at the indoor

unit will allow low pressure nitrogen to flow through the

system,)

NOTE -Use silver alloy brazing rods with five or six percent

minimum silver afloy for copper-to-copper brazing or 45

percent silver alloy for copper-to-brass or copper-to-steel

brazing.

6. Braze the liquid line to the liquid line service valve,

Turn off nitrogen flow. Repeat procedure starting at

paragraph 4 for brazing the suction line to the suction

service valve.

7. After all connections have been brazed, disconnect

manifold gauge set the from service ports and remove

wrapping. Reinstall the service port core for both of the

outdoor unit's service valves.

Remove the existing HCFC-22 refrigerant flow control

orifice or thermal expansion valve from the indoor coil. The

existing indoor unit HCFC-22 metering device is not

approved for use with HFC-410A refrigerant and may

prevent proper flushing,

REPLACEMENT PARTS

If replacement parts are necessary for the indoor unit,

order kit 69J46, The kit includes:

• 10 -- Brass nuts for liquid line assemblies

• 20 -- Teflon rings

• 10 -- Liquid line orifice housings

• 10 -- Liquid line assemblies

PISTON

LIQUID LINE ORIFICE HOUSINGS (10) /RETAINER

/BRASS NUTS (10) _j_

UQU,DL,NEASSEMBL,ES" .J __C%ER

(INCLUDES STRAINER) (10) LIQUID LINE

ASSEMBLY

Figure 18. 69J46 Kit Components

TYPICAL FIXED ORIFICE REMOVAL PROCEDURE

1. On fully cased coils, remove the coil access and

plumbing panels.

2. Remove any shipping clamps holding the liquid line

and distributor assembly,

3. Using two wrenches, disconnect liquid line from liquid

line orifice housing. Take care not to twist or damage

distributor tubes during this process.

4. Remove and discard fixed orifice, valve stem

assembly if present and Teflon washer as illustrated in

figure 19.

5. Use a field-provided fitting to temporary reconnect the

liquid line to the indoor unit's liquid line orifice housing,

DISTRIBUTOR TUBES

LIQUID LINE ORIFICE HOUSING

TEFLON RING Remove and discard valve

FIXED slem assembly (if present)

/ORIFICE/

"" " " BRASS NUT

DISTRIBUTO"R " " - "• _ _ " " "

ASSEMBL___X_ LIQUID LINE ASSEMBLY

(INCLUDES STRAINER)

VALVE STEM CAP (Uncased Coil Shown)

Figure 19. Typical Fixed Orifice Removal

Page 11

SPB*H4 SERIES

TYPICAL TXV/CTXV REMOVAL PROCEDURE

1, On fully cased coils, remove the coil access and

plumbing panels,

2, Remove any shipping clamps holding the liquid line

and distributor assembly.

3. Disconnect the equalizer line from the TXV/CTXV

equalizer line fitting on the suction line.

TWO PIECE

PATCH PLATE

UNCASED COIL

ONLY)

DISTRIBUTOR

TUBES

(Uncased Coil Shown)

LIQUID LINE STUB END

ORIFICE HOUSING TXV/CTXV

RING

SENSING

LINE

MALE EQUALIZER /

LINE FITTING SUCTION

LINE

SENSING BULB LIQUID

LINE

Figure 20. Typical TXV/CTXV Removal

4, Remove the suction line sensing bulb.

5, Disconnect the liquid line from the TXV/CTXV at the

liquid line assembly,

6, Disconnect the TXV/CTXV from the liquid line orifice

housing. Take care not to twist or damage distributor

tubes during this process,

7, Remove and discard TXV/CTXV and the two Teflon

rings,

8, Use a field-provided fitting to temporary reconnect the

liquid line to the indoor unit's liquid line orifice housing,

IMPORTANT

CAUTION

A IMPORTANT

IMPORTANT

If the original system used:

•HCFC-22 refrigerant, then flush the system using the

procedure provided in this section.

• HFC-410A refrigerant, then proceed to Installing New

Refrigerant Metering Device,

RECOVERY MACHINE

NOTE - THE INVERTED HCFC-22 CYLINDER MUST CONTAIN AT LEAST THE SAME

AMOUNT OF REFRIGERANT AS WAS RECOVERED FROM THE EXISTING SYSTEM,

Figure 21. Typical Flushing Connection

505330M 02/08

Page 12

REQUIRED EQUIPMENT

Equipment required to flush the existing line set and indoor

unit coil:

• Two clean HCFC-22 recovery bottles,

• Oilless recovery machine with pump-down feature,

• Two gauge sets (one for HCFC-22; one for

HFC-410A).

FLUSHING PROCEDURE

1. Connect the following:

• HCFC-22 cylinder with clean refrigerant to the

suction service valve,

• HCFC-22 gauge set to the liquid line valve,

• Recovery machine with an empty recovery tank to

the gauge set,

2. Set the recovery machine for liquid recovery and start

the recovery machine. Open the gauge set valves to

allow the recovery machine to pull a vacuum on the

existing system line set and indoor unit coil.

3. Invert the cylinder of clean HCFC-22 and open its

valve to allow liquid refrigerant to flow into the system

through the suction line valve, Allow the refrigerant to

pass from the cylinder and through the line set and the

indoor unit coil before it enters the recovery machine.

4. After all of the liquid refrigerant has been recovered,

switch the recovery machine to suction recovery so

that all of the HCFC-22 suction is recovered. Allow the

recovery machine to pull a vacuum on the system,

5. Close the valve on the inverted HCFC-22 drum and

the gauge set valves. Pump the remaining refrigerant

out of the recovery machine and turn the machine off.

SPB*H4 units use CTXVfor metering refrigerant only. This

section provides instructions on installing CTXV

refrigerant metering device.

I/2 TURN

Figure 22. Tightening Distance

SPB*H4 ENGINEERING HANDBOOK

See the SPB*H4 Engineering Handbook for approved

indoor/outdoor match-ups, applicable CTXV kits and

application information,

The following is the typical contents of a CTXV kit:

1 -- CTXV

2 -- Teflon rings

1-- 1 1/4" wide copper mounting strap for sensing bulb

2 --#10 hex head bolts and nuts for securing sensing bulb

AND NUTS (2)

O_TEFLON

RINGS (2) _ _ff

STRAP (1)

Figure 23. CTXV Kit Components

TYPICAL CTXV INSTALLATION PROCEDURE

The CTXV unit can be installed internal or external to the

indoor coil. In applications where an uncased coil is being

installed in a field-provided plenum, install the CTXV in a

manner that will provide access for field servicing of the

CTXV, Refer to Figure 24 for reference during installation

of CTXV unit,

TWOPIECE (Uncased Coil Shown)

PATCH PLATE

(UNCASED COIL

ONLY) LIQUID LINE

_ _RIFICE STUB END

OUSING CTXV

DISTRIBUTOR

TUBES. - - ..

RING

SENSING

LINE

MALE EQUALIZER

LiNE FITTING (SEE

FIGURE 26 FOR LINE

FURTHER

DETAILS)

SENSING BULB INSULATION IS

REQUIRED IF MOUNTED EXTERNAL

TO THE COIL CASING SEE FIGURE 25

FOR BULB POSITIONING.

LIQUID

LINE

Figure 24. Typical CTXV Installation

1, Remove the field-provided fitting that temporary

reconnected the liquid line to the indoor unit's

distributor assembly.

2. Install one of the provided Teflon rings around the

stubbed end of the CTXV and lightly lubricate the

connector threads and expose surface of the Teflon

ring with refrigerant oil,

Page13

SPB*H4 SERIES

3. Attach the stubbed end of the CTXV to the liquid line

orifice housing. Finger tighten and use an appropriately

sized wrench to turn an additional 1/2 turn clockwise

as illustrated in figure 22, or 20 ft-lb.

4. Place the remaining Teflon washer around the other

end of the CTXV. Lightly lubricate connector threads

and expose surface of the Teflon ring with refrigerant

oil.

5. Attach the liquid line assembly to the CTXV. Finger

tighten and use an appropriately sized wrench to turn

an additional 1/2 turn clockwise as illustrated in figure

22, or 20 ftqb.

6. Attach the suction line sensing bulb in the proper

orientation as illustrated in figure 25 using the clamp

and screws provided.

NOTE -Insulating the sensing bulb once installed may be

required when the bulb location is external to the coil

casing.

ON LINES SMALLER THAN

SUCT,ONL,NE 7#,

CKPOSITION

fBULBt

SUCTION LINE

ON 7/8" AND LARGER LINES,

MOUNT SENSING BULB AT

EITHER THE 4 OR 8 O'CLOCK

P__SITION. NEVER MOUNT

BOTTOM OF LINE.

Figure 25. TXV Sensing Bulb Installation

FLARE SEAL

CAP ÷

__ FLARE NUT

X COPPER

I"II_ -- FLARE SEAL

V_ BONNET

-- MALE BRASS EQUALIZER

_ LINE FITTING

SUCTION LINE

Figure 26. Copper Flare Seal Bonnet Removal

8. Connect the equalizer line from the TXV to the

equalizer suction port on the suction line. Finger

tighten the flare nut plus 1/8 turn (7 ft-lbs) as illustrated

in figure 22.

NOTE -To prevent any possibility of water damage,

properly insulate all parts of the TXV assembly that may

sweat due to temperature differences between the valve

and its surrounding ambient temperatures.

After the line set has been con nected to the indoor unit and

air conditioner, check the line set connections and indoor

unit for leaks. Use the following procedure to test for leaks:

IMPORTANT

WARNING

7. Remove and discard either the flare seal cap or flare

nut with copper flare seal bonnet from the equalizer

line port on the suction line as illustrated in figure 26.

AIMPORTANT

AWARNING

505330M 02/08

Page 14

,WARNING Xk WARNING

1. Connect an HFC-410A manifold gauge set high

pressure hose to the suction valve service port.

(Normally, the high pressure hose is connected to the

liquid line port; however, connecting it to the suction

port better protects the manifold gauge set from high

pressure damage,)

2. With both manifold valves closed, connect the cylinder

of HFC-410A refrigerant to the center port of the

manifold gauge set. Open the valve on the HFC-410A

cylinder (suction only),

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

HFC-410A into the line set and indoor unit, Weigh in

a trace amount of HFC-410A, [A trace amount is a

maximum of two ounces (57 g) refrigerant or three

pounds (31 kPa) pressure], Close the valve on the

HFC-410A cylinder and the valve on the high pressure

side of the manifold gauge set, Disconnect the

HFC-410A cylinder,

4. Connect a cylinder of dry nitrogen with a pressure

regulating valve to the center port of the manifold

gauge set,

5. Adjust dry nitrogen pressure to 150 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,

6. After a few minutes, open one of the service valve

ports and verify that the refrigerant added to the

system earlier is measurable with a leak detector.

7. After leak testing disconnect gauges from service

ports.

Evacuating the system of non-condensables is critical for

proper operation of the unit. Non-condensables are

defined as any gas that will not condense under

temperatures and pressures present during operation of

an air conditioning system. Non-condensables and water

suction combine with refrigerant to produce substances

that corrode copper piping and compressor parts.

,& IMPORTANT

1. Connect manifold gauge set to the service valve ports

as follows:

• low pressure gauge to suction 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

mercury),

NOTE -During the early stages of evacuation, it is

desirable to close the manifold gauge valve at least once to

determine if there is a rapid rise in sure indicates a

relatively large leak, If this occurs, repeat the leak testing

procedure.

NOTE -The term absolute pressure means the total

actual pressure within a given volume or system, above

the absolute zero of pressure. Absolute pressure in a

vacuum is equal to atmospheric pressure minus 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 dry nitrogen

cylinder 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.

7. Shut off the dry nitrogen cylinder and remove the

manifold gauge hose from the cylinder. Open the

manifold gauge valves to release the dry 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

Page15

SPB*H4 SERIES

vacuum pump and connect it to an upright cylinder of

HFC-410A refrigerant. Open the manifold gauge valve

1 to 2 psig in order to release the vacuum in the line set

and indoor unit.

10. Close manifold gauge valves and shut off the

HFC-410A cylinder and remove the manifold gauge

set.

If the system is void of refrigerant, clean the system using

the procedure described below.

1. Use nitrogen to pressurize the system and check for

leaks. Repair all leaks.

2. Evacuate the system to remove as much of the

moisture as possible.

3. Use nitrogen to break the vacuum and install a new

filter drier in the system.

4. Evacuate the system again. Then, weigh the

appropriate amount of HFC-410A refrigerant as listed

on unit nameplate into the system.

5. Monitor the system to determine the amount of

moisture remaining in the oil. It may be necessary to

replace the filter drier several times to achieve the

required dryness level. If system dryness is not

verified, the compressor will fail in the future.

WARNING I

In the U.S.A., wiring must conform with current local codes

and the current National Electric Code (NEC). In Canada,

wiring must conform with current local codes and the current

Canadian Electrical Code (CEC).

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.

24VAC TRANSFORMER

Use the transformer provided with the furnace or coil

blower for low-voltage control power (24VAC - 40 VA

minimum)

NOTE -The addition of accessories to the system could

exceed the 40VAC power requirement of the

factory-provided transformer. Measure the system's

current and voltage after installation is complete to

determine transformer loading. If loading exceeds the

factory-provided transformer capacity, a larger

field-provided transformer will need to be installed in the

system,

WIRING CONNECTIONS

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

sized disconnect switch,

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

ground,

NOTE -Connect condu# to the unit using a proper

conduit fitting. Units are approved for use only with

copper conductors. Refer to figure 27 for high voltage

field wiring diagram, A complete unR wiring diagram is

located on the back side of the unit's access panel.

OUTDOOR

FAN

184 Cb}---

AI08 GROUND

DEFROST CONTROL LOG

ORANGE-COMMON

BLACK-RUN

PURPLE-

CAPACITOR

KI COMPRESSOR

UUN_AUIUM

_Llt_ VOLTAGE

FIELD INSTALLED

_OUND

NOTE - FOR USE WITH COPPER CONDUCTORS ONLY. REFER TO UNIT

RATING PLATE FOR MINIMUM CIRCUIT AMPACITY AND MAXIMUM

OVER-CURRENT PROTECTION SIZE.

Figure 27. Typical Field Wiring

505330M 02/08

Page 16

RT28 DISCHARGE

SENSOR

SB7 LOW

PRESSURE

SWITCH

LI REVERSING

VALVE

RTI3 AMBIENT <m

SENSOR _

RT21 DEFROST

COIL SENSOR

$4 HIGH

PRESSURE

SWITCH

$5 DISCH

LIMIT TEMP

BICOMPRESSORz_

_K58- I

_ ._'_V BLACK_A I

(_}C FA

OIL K_

i AMB

: DIS

°OUT

LO-PS

K4 P2

YB OUT

WARNING-

Z_ELECTRIC SHOCK HAZARD,CAN CAUSE

INJURY OR DEATH,UNIT MUST BE

FAN

EQUIPMENT

GROUND cc

_DENOTES OPTIONAL COMPONENTS

LINE VOLTAGE FIELD INSTALLED

-- -- -- CLASS II VOLTAGE FIELD INSTALLED

T73OOF

CB31MV THERMOSTAT

o%yMv

I I C>-- -- J%_ _ I_

I.... -+-4#I

Ill ................................................................................................................................................_:.................................I...................................................

I I I I I OUTr..___ = _I _ _!LTUHEoWRIIRMEPED

I I I I I I-- _I _ TERMINAL

CRIMPED TO BLUE WIRE USE TERMINAL OR CUT

OFF TERMINAL AND SPLICE BLUE WIRE WITH Y2

GROUNDEO IN ACCORDANCE WITH

NATIONAL AND LOCAL CODES.

_!_REMOVE JUMPER FOR TWO STAGE COOL

NOTE-

Z_FOR USE WITH COPPER CONDUCTORS ONLY,REFER TO UNIT RATING

PLATE FOR MINIMUM CIRCUIT AMPAC]TY AND MAXIMUM OVER-

CURRENT PROTECTION SIZE

Z_REPER TO COMPRESSOR IN UNIT FOR ACTUAL TERMINAL ARRANGEMENT. _RTI4 SENSOR,OUTDOOR TEMP (OPTIONAL)

WIRE TO INDOOR UNIT.

/A L$4,SECOND STAGE, SOLENOID IS LOCATED

z_IN COMPRESSOR. COIL IS Z¢VDC, DO NOT CONNECT

R4VAC TO COIL TERMINALS.

Z_ SII AND K58 ARE OPTIONAL LOWAMBIENT CONTROLS

Figure 28. Typical

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 lOg' (3Om) 16 rating 35°C minimum

3. Install room thermostat (ordered separately) on an

inside 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,

4, Install low voltage wiring from outdoor to indoor unit

and from thermostat to indoor unit (figure 28),

NOTE -24V, Class II circuit connections are made in

the low voltage junction box.

Wiring Diagram

THREE-PHASE SCROLL VOLTAGE PHASING

Three-phase scroll compressors must be phased

sequentially to ensure correct compressor rotation and

operation. Incorrect line voltage phasing may cause

compressor damage and abnormal unit operation. Power

wires are color-coded as follows: Line 1 - red, line 2 - yellow,

line 3 - blue,

To test for proper rotation and operation:

1, Install refrigeration gauges on system, Cycle

compressor ON and observe that suction pressure

decreases and discharge pressure increases,

2, If pressures do not follow the above conditions,

disconnect all power to unit, Reverse any two

field-installed main power wires to the line side of the

compressor contactor. Make sure connections are tight,

Repeat pressure test with system,

Page 17

SPB*H4 SERIES

Temp. IDT

ofair 180 24 24 24 23 23 22 22 22 20 19 18 17 16 15

entering._78 23 23 23 22 22 21 21 20 19 18 17 16 15 14

indoor _ I _ _

coilOF _jru _ 22 22 21 21 20 19 19 18 17 16 15 14 13

m_'174 21 21 21 20 19 19 18 17 16 16 15 14 15 12

_72 20 20 19 18 17 17 16Z_15 14 13 12 11 10

_70 19 19 18 18 17 17 16 15 15 14 13 12 11 10

Wet-bulb°F 57 58 59 60 61 62 63 64 65 66 67 68 69 70 I

n A

19o INDOOR

BDRY

BULB

WET

All temperatures are

expressed in °F COIL BULB

1. Determine the desired ])T--Measure entering air tempera-

ture using dry bulb (A) and wet bulb (B). ])T is the intersecting value

of A and B in the table (see triangle),

2. Find temperature drop across coil--Measure the coil's dry

bulb entering and leaving air temperatures (A and C). Temperature

Drop Formula: (TDrop) = A minus C,

3. Determine if fan needs adjustment_lf the difference be-

tween the measured TDrop and the desired ])T (TDropiDT) is within

+3°, no adjustment is needed. See examples: Assume ])T = 15 and

A temp. = 72 °, these C temperatures would necessitate stated ac-

tions:

C ° TDrop- ])T = °F ACTION

530 19 15 = 4 Increase the airflow

58 °14 15 = -1 (within +3 ° range) no change

620 10 15 = -5 Decrease the airflow

4. Adjust the fan speed--See indoor unit instructions to in-

crease/decrease fan speed.

Changing air flow affects all temperatures; recheck temperatures to

confirm that the temperature drop and DT are within +3 °.

IMPORTANT

Figure 29. Checking Indoor Coil Airflow Guide

SETTING UP TO CHECK CHARGE

1, Close manifold gauge set valves. Connect the center

manifold hose to an upright cylinder of HFC-410A.

2. Connect the manifold gauge set to the unit's service

ports as illustrated in figure 2.

•low pressure gauge to vapor service port

• high pressure gauge to liquid service port

1. Rotate fan to check for binding.

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

connections.

3, After evacuation is complete, open both the liquid and

vapor line service valves to release the refrigerant

charge contained in outdoor unit into the system,

4, Replace the stem caps and tighten to the value listed

in table 1,

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 with the power company and the

voltage condition has been corrected,

6, Set the thermostat for a cooling demand. Turn on

power to the indoor indoor unit and close the outdoor

unit disconnect switch to start the unit.

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

be within range shown on the nameplate,

8, Check system for sufficient refrigerate by using the

procedures listed under Testing and Charging

System,

TESTING AND CHARGING SYSTEM

This system uses HFC-410A refrigerant which operates at

much higher pressures than HCFC-22. The pre-installed

liquid line filter drier is approved for use with HFC-410A

only. Do not replace it with components designed for use

with HCFC-22. This unit is NOT approved for use with coils

which use capillary tubes as a refrigerant metering device,

COOLING MODE INDOOR AIRFLOW CHECK

Check airflow using the Delta-T (DT) process using the

illustration in figure 29,

HEATING MODE INDOOR AIRFLOW CHECK

Blower airflow (CFM) may be calculated by energizing

electric heat and measuring:

•Temperature rise between the return air and supply air

temperatures at the indoor coil blower unit,

• Measuring voltage supplied to the unit,

• Measuring amperage being drawn by the heat unit(s),

Then, apply the measurements taken in following formula

to determine CFM:

Amps x Volts x 3.41

CFM = 1.08 x Temperature rise (F)

CALCULATING CHARGE

If the system is void of refrigerant, first, locate and repair

any leaks and then weigh in the refrigerant charge into the

unit, To calculate the total refrigerant charge:

Additional charge

Amount Adjust amount, for specified per

specified variation in line set indoor unit

on length listed on table match-up listed in Total

nameplate in figure 30. tables 3through 5. charge

+ + =

505330M 02/08

Page 18

WEIGH

Refrigerant Charge per Line Set Length

Liquid Line Ounces per 5 feet (g per 1.5 m)

Set Diameter adjust from 15 feet (4.6 m) line set*

3t8" (9.5 mm) 3 ounce per 5' (85 g per 1.5 m)

NOTE - *If line length is greater than 15 ft. (4.6 m), add this

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

amount.

LENNOX

_ a

¢ _5 ;:

HmBl/Jillln|

@,::::_, B

1. Check Liquid and suction line pressures

2. Compare unit pressures with table 7,

Normal Operating Pressures.

3. Conduct leak check; evacuate as

previously outlined.

4. Weigh in the unit nameplate charge plus

any charge required for line set differences

over feet,

This nameplate is for illustration purposes

only. Go to actual nameplate on outdoor

unit for charge information.

Figure 30. Using Weigh In Method

SUBCOOL G'

USE COOLING

MODE

60°F (15 °) --

USE HEATING

MODE

q;_@i}ii¢

SATo

LIQ o -

SC o =

Check the airflow as illustrated in figure 29 to be sure the indoor airflow is as required.

(Make any air flow adjustments before continuing with the following procedure.)

Measure outdoor ambient temperature; determine whether to use cooling mode or

heating mode to check charge.

Connect gauge set.

Check Liquid and Vapor line pressures. Compare pressures with Normal Operating

Pressures table 7, (The reference table is a general guide. Expect minor pressure

variations. Significant differences may mean improper charge or other system problem.)

Set thermostat for heat/cool demand, depending on mode being used:

Using cooling mode--When the outdoor ambient temperature is 60°F (15°C) and above.

Target subcooling values in table below are based on 70 to 80°F (21-27°C) indoor return air

temperature; if necessary, operate heating to reach that temperature range; then set

thermostat to cooling mode setpoint to 68°F (20°C). When pressures have stabilized, continue

with step 6.

Using heating mode--When the outdoor ambient temperature is below 60°F (15°C). Target

subcooling values in table below are based on 65-75°F (18-24°C) indoor return air

temperature; if necessary, operate cooling to reach that temperature range; then set

thermostat to heating mode setpoint to 77°F (25°C). When pressures have stabilized, continue

with step 6.

6 Read the liquid line temperature; record in the LIQ ° space.

7 Read the liquid line pressure; then find its corresponding temperature in the temperature/

pressure chart listed in table 6 and record it in the SAT° space.

8 Subtract LIQ° temp. from SAT ° temp. to determine subcooling; record it in SC ° space.

9 Compare SC° results with table below, being sure to note any additional charge for line set

and/or match-up.

10 If subcooling value is greater than shown in tables 3 through 5 for the applicable unit, remove

refrigerant; if less than shown, add refrigerant.

11 If refrigerant is added or removed, repeat steps 6 through 10 to verify charge.

Figure 31. Using Subcooling Method

Page 19

SPB*H4 SERIES

Table 3. SPB*H4-036

INDOOR Target

Subcooling Heat Cool **Add charge

MATCH-UP (+5OF) (±1OF)

CH23-51 17 7 0 13

CH23-85 12 8 1 10

CBX28UH-030 25 8 1 14

CBX28UH-038 25 8 1 14

CB27UH-036 17 8 2 4

CB27UH-042 17 8 2 4

CB3OU-31 17 6 0 0

CB3OU-41/46 17 8 2 4

CBX32M-030 17 6 0 0

CBX32M-036 17 8 2 4

CBX32MV-024/030 17 6 0 0

CBX32MV-036 17 8 2 4

C33-44C 17 8 1 14

CH33-428 2F 17 7 0 13

CH33-44/48B 2F 12 8 1 8

CH33-48C 2F 10 8 1 6

CH33-438 9 10 1 6

CH33-49C 9 10 1 6

CR33_48B/C-F 25 8 2 0

CR33-50/60C F 25 9 0 14

CX34-38A/B_F Senal No# before 6007K 31 7 1 5

CX34-38A/B_F Senal No# 6007K and after 10 8 1 12

CX34-43B/C_F 10 8 1 6

CX34-6OD 9 9 0 14

**Amount of charge required in additional to charge shown on unit

nameplate. (Remember to consider line set length difference.)

Table 4. SPB*H4-048

INDOOR Target

Subcoo]ing Heat Cool **Add charge

MATCH-UP (+5OF) (±1OF)

CH23-88 15 13 0 7

CB27UH-048 17 7 0 0

CB27UH-080 17 7 0 0

CB30U-51, _5 17 7 0 0

CBX32M 048, 080 17 7 0 0

CBX32MV 088 18 10 0 3

CH33-60D 2F 18 4 0 2

CH33-62D 2F 15 10 0 4

CR33-60 40 4 0 2

CX34-60D 6F 18 4 0 2

CX34-62D 6F 18 8 0 2

Table 5. SPB*H4-060

INDOOR Target

Subcooling Heat Cool **Add charge

MATCH-UP (+5OF) (+1OF)

CH23-68 13 14 3 3

CH23-65 18 2 O O

CBX26UH 060 13 14 3 5

CB27UH-060 13 10 2 1

CBX32M 060 13 10 2 1

CBX32MV 068 13 12 2 9

CH33-6OD 2F 15 6 1 3

INDOOR Target

MATCH-UP Subcooling Heat Cool **Add charge

(+5°F) (+l°F)

CH88_2D 2F 13 12 2 10

CR33 80/80C F 30 8 1 3

CR33_0D_ 30 8 1 3

CX34_9C 6F 13 9 1 14

CX34_0D 6F 15 6 1 3

CX34_2C 6F 13 11 2 6

CX34_2D 6F 13 11 2 5

Table 6. HFC-410A Temp. (°F) - Pressure (Psig)

°F Psig °F Psig °F Psig °F Psig

-40 10.1 21 80.5 56 158.2 91 278.2

-35 13.5 22 82.3 57 161 92 282.3

-30 17.2 23 84.1 58 163.9 93 286.5

-25 21.4 24 85.9 59 166.7 94 290.8

-20 25.9 25 87.8 60 169.6 95 295.1

-18 27.8 26 89.7 61 172.6 96 299.4

-16 29.7 27 91.6 62 175.4 97 303.8

-14 31.8 28 93.5 63 178.5 98 308.2

-12 33.9 29 95.5 64 181.6 99 312.7

-10 36.1 30 97.5 65 184.3 100 317.2

-8 38.4 31 99.5 66 187.7 101 321.8

-6 40.7 32 100.8 67 190.9 102 326.4

-4 43.1 33 102.9 68 194.1 103 331

-2 45.6 34 105 69 197.3 104 335.7

0 48.2 35 107.1 70 200.6 105 340.5

1 49.5 36 109.2 71 203.9 106 345.3

2 50.9 37 111.4 72 207.2 107 350.1

3 52.2 38 113.6 73 210.6 108 355

4 53.6 39 115.8 74 214 109 360

5 55 40 118 75 217.4 110 365

6 56.4 41 120.3 76 220.9 111 370

7 57.9 42 122.6 77 224.4 112 375.1

8 59.3 43 125 78 228 113 380.2

9 60.8 44 127.3 79 231.6 114 385.4

10 62.3 45 129.7 80 235.3 115 390.7

11 63.9 46 132.2 81 239 116 396

12 65.4 47 134.6 82 242.7 117 401.3

13 67 48 137.1 83 246.5 118 406.7

14 68.6 49 139.6 84 250.3 119 412.2

15 70.2 50 142.2 85 254.1 120 417.7

16 71.9 51 144.8 86 258 121 423.2

17 73.5 52 147.4 87 262 122 428.8

18 75.2 53 150.1 88 266 123 434.5

19 77 54 152.8 89 270 124 440.2

20 78.7 55 155.5 90 274.1 125 445.9

505330M 02/08

Page 20

Table 7. Normal Operating Pressures - Liquid +10 & Vapor +5 PSIG*

Model SPB036H4S4 SPB048H4S4 SPB060H4S4

Mode Stage °F (°C)** Liquid Vapor Liquid Vapor Liquid Vapor

65 (18.3) 225 144 235 144 225 138

75 (23.9) 261 147 268 145 264 141

First (Low 85 (29.4) 302 149 310 147 305 142

Capacity)

Pressure 95(35.0) 349 151 356 148 352 146

165 (46.6) 397 153 407 150 405 148

115 (46.1) 461 157 466 152 459 150

Cooling 65 (18.3) 239 139 244 140 241 134

75 (23.9) 278 141 283 141 280 136

Second (High 85 (29.4) 322 143 326 144 324 137

Capacity)

Pressure 95(35.0) 367 146 374 147 373 138

165 (46.6) 426 148 427 148 425 142

115 (46.1) 489 151 491 151 486 146

First (Low 46 (4.4) 328 98 369 75 351 63

Capacity)

Pressure 50 (10) 333 118 366 114 335 92

26 (-7.6) 296 62 311 58 308 59

Heating Second

(High 36 (-1.6) 309 75 334 72 323 70

Capacity) 46 (4.4) 322 92 354 89 318 69

Pressure 56 (16) 336 113 381 108 329 82

*IMPORTANT--These are most-popular-match-up pressures. Indoor match up and indoor load cause pressures to vary.

**Temperature of the air entering the outside coil (outdoor ambient temperature).

INSTALLING SERVICE VALVE CAPS

Disconnect gauge set and re-install both the liquid and

suction service valve caps,

INSTALL CAPS

OUTDOOR UNIT /

SERVICE VALVES _

Figure 32. Installing Service Valve Caps

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

continuously.

THERMOSTAT OPERATION

Some indoor thermostats incorporate isolating contacts

and an emergency heat function (which includes an amber

indicating light). The thermostat is not included with the

unit and must be purchased separately,

EMERGENCY HEAT (AMBER LIGHT)

An emergency heat function is designed into some room

thermostats. This feature is applicable when isolation of the

outdoor unit is required, or when auxiliary electric heat is

staged by outdoor thermostats. When the room thermostat is

placed in the emergency heat position, the outdoor unit

control circuit is isolated from power and field-provided relays

bypass the outdoor thermostats. An amber indicating light

simultaneously comes on to remind the homeowner that he

is operating in the emergency heat mode.

Emergency heat is usually used during an outdoor unit

shutdown, but it should also be used following a power

outage if power has been off for over an hour and the

outdoor temperature is below 50°F (10°C). System should

be left in the emergency heat mode at least six hours to

allow the crankcase heater sufficient time to prevent

compressor slugging.

FILTER DRIER

The unit is equipped with a large-capacity bi-flow filter drier

which keeps the system clean and dry. If replacement is

necessary, order another of like design and capacity. The

replacement filter drier must be suitable for use with

HFC-410A refrigerant.

DEFROST SYSTEM DESCRIPTION

The demand defrost controller measures differential

temperatures to detect when the system is performing

poorly because of ice build-up on the outdoor coil, The

controller self-calibrates when the defrost system starts

and after each system defrost cycle. The defrost control

board components are shown in figure 33,

Page21

SPB*H4 SERIES

TESTPINS

DEFROST

TERMINATION

PINSETTINGS

SENSOR

PLUGIN

(COILAND

AMBIENT

SENSORS)

DELAY

PINS

REVERSING

VALVE

CIRCUIT

CONNECTIONS

_o-Ps

..... [_O

oo o ooo • oO

TSTP_ OF C _ 0 Y] YZ

-- LOW

AMBIENT

THERMOSTAT

PINS

-- DIAGNOSTIC

LEDS

J 24V TERMINAL

STRIP

CONNECTIONS

NOTE - COMPONENT LOCATIONS VARY BY BOARD MANUFACTURER.

Figure 33. Outdoor Unit Defrost

Control Board (100135-03)

The control monitors ambient temperature, outdoor coil

temperature, and total run time to determine when a

defrost cycle is required. The coil temperature probe is

designed with a spring clip to allow mounting to the outside

coil tubing. The location of the coil sensor is important for

proper defrost operation.

NOTE -The demand defrost board accurately measures

the performance of the system as frost accumulates on the

outdoor coil. This typically will translate into longer running

time between defrost cycles as more frost accumulates on

the outdoor coil before the board initiates defrost cycles.

DEFROST BOARD DIAGNOSTIC LEDS

The state OFF, ON and FLASHING of two LEDs on the

defrost board DS1 [Red] and DS2 [Green] indicate

diagnostics conditions that are described in table 9.

DEFROST BOARD PRESSURE SWITCH

CONNECTIONS

The unit's automatic reset pressure switches LO PS-$87

and HI PS-S4 are factory-wired into the defrost board on

the LO-PS and HI-PS terminals, respectively.

Low Pressure Switch (LO-PS)--When the low pressure

switch trips, the defrost board will cycle off the compressor,

and the strike counter in the board will count one strike.

The low pressure switch is ignored under the following

conditions:

• during the defrost cycle and 90 seconds after the

termination of defrost

• when the average ambient sensor temperature is

below 15° F (-9°C)

• for 90 seconds following the start up of the compressor

• during TEST mode

High Pressure Switch (HI-PS)--When the high pressure

switch trips, the defrost board will cycle off the compressor,

and the strike counter in the board will count one strike.

DEFROST BOARD PRESSURE SWITCH SETTINGS

High Pressure (auto reset) - trip at 590 psig; reset at 418

psig.

Low Pressure (auto reset) - trip at 25 psig; reset at 55

psig.

PRESSURE SWITCH 5-STRIKE LOCKOUT

The internal control logic of the board counts the pressure

switch trips only while the Y1 INPUT line is active. If a

pressure switch opens and closes four times during a Y1

INPUT, the control logic will reset the pressure switch trip

counter to zero at the end of the Y1 INPUT. If the pressure

switch opens for a fifth time during the current Y1 INPUT,

the control will enter a lockout condition.

The 5-strike pressure switch lockout condition can be reset

by cycling OFF the 24-volt power to the control board or by

shorting the TEST pins between 1 to 2 seconds. All timer

functions (run times) will also be reset.

If a pressure switch opens while the Y1 OUT line is

engaged, a 5-minute short cycle will occur after the switch

closes.

DEFROST SYSTEM SENSORS

Sensors connect to the defrost board through a

field-replaceable harness assembly that plugs into the

board (see figure 35). Through the sensors, the board

detects outdoor ambient, coil, and discharge temperature

fault conditions. As the detected temperature changes, the

resistance across the sensor changes. Figure 34 shows

how the resistance varies as the temperature changes for

both type of sensors. Sensor resistance values can be

checking by ohms across pins shown in table 8.

NOTE -When checking the ohms across a sensor, be

aware that a sensor showing a resistance value that is not

within the range shown in table 8, may be performing as

designed. However, if a shorted or open circuit is detected,

then the sensor may be faulty and the sensor harness will

need to be replaced.

Table 8. Sensor Temperature/Resistance Range

Temperature Resistance values Pins/Wire

Sensor Range °F (°C) range (ohms) Color

-35 (-37) to 120 3 & 4

Outdoor (48) 280,000 to 3750 (Black)

-35 (-37) to 120 5 & 6

Coil (48) 280,000 to 3750 (Brown)

Discharge (if 24 (-4) to 350 1 & 2 (Yel-

applicable) (176) 41,000 to 103 low)

Note: Sensor resistance increases as sensed temperature decreases.

505330M 02/08

Page 22

Ambient Sensor--The ambient sensor considers

outdoortemperaturesbelow-35°F(-37°C)orabove120°F

(48°C)asafault.Iftheambientsensorisdetectedasbeing

open,shortedor out of the temperaturerangeof the

sensor,the board will not performdemanddefrost

operation.The boardwill revertto time/temperature

defrostoperationandwill displaytheappropriatefault

code.Heatingandcoolingoperationwillbeallowedinthis

faultcondition.

Ambient and Coil Sensor

m 7150

19275

11775

_m 15425

_ 19975

26200

m 34375

m 46275

I I 62700

10000 30000 50000 70000

RESISTANCE (OHMS)

Dischar le Sensor

85300

90000

B250

_325

_425

_600

_825

m_175

700

2025

_500

;000

3750

4650 5825

1000 2000 3000 4000 5000 6000

RESISTANCE/OHMS/

Figure 34. Temperature/Resistance

Charts

Coil Sensor--The coil temperature sensor considers

outdoor temperatures below -35°F (-37°C) or above 120°F

(48°C) as a fault. If the coil temperature sensor is detected

as being open, shorted or out of the temperature range of

the sensor, the board will not perform demand or

time/temperature defrost operation and will display the

appropriate fault code. Heating and cooling operation will

be allowed in this fault condition.

Discharge Line Sensor--If the discharge line

temperature exceeds a temperature of 300°F (148°C)

during compressor operation, the board will de-energize

the compressor contactor output (and the defrost output, if

active). The compressor will remain off until the discharge

temperature has dropped below 225°F (107°C) and the

5-minute anti-short cycle delay has been satisfied. This

sensor has two fault and lockout codes:

1. If the board recognizes five high discharge line

temperature faults during a single Y1 compressor

demand, it reverts to a lockout mode and displays the

appropriate code. This code detects shorted sensor or

high discharge temperatures. Code on board is

Discharge Line Temperature Fault and Lockout.

2. If the board recognizes five temperature sensor range

faults during a single Y1 compressor demand, it

reverts to a lockout mode and displays the appropriate

code. The board detects open sensor or

out-of-temperature sensor range. This fault is

detected by allowing the unit to run for 90 seconds

before checking sensor resistance. If the sensor

resistance is not within range after 90 seconds, the

board will count one fault. After five faults, the board

will lockout. Code on board is Discharge Sensor Fault

and Lockout.

The discharge line sensor, which covers a range of 150°F

(65°C) to 350°F (176°C), is designed to mount on a W'

refrigerant discharge line.

NOTE -Within a single room thermostat demand, if

5-strikes occur, the board will lockout the unit. Defrost

board 24 volt power R must be cycled OFF or the TEST

pins on board must be shorted between I to 2seconds to

reset the board.

Second-Stage Operation--If the board receives a call for

second-stage compressor operation Y2 in heating or

cooling mode and the first-stage compressor output is

active, the second-stage compressor solenoid output will

be energized.

If first-stage compressor output is active in heating mode

and the outdoor ambient temperature is below the selected

compressor lock-in temperature, the second-stage

compressor solenoid output will be energized without the

Y2 input. If the jumper is not connected to one of the

temperature selection pins on P3 (40, 45, 50, 55°F), the

default lock-in temperature of 40°F (4.5°C) will be used.

The board de-energizes the second-stage compressor

solenoid output immediately when the Y2 signal is

removed or the outdoor ambient temperature is 5°F above

the selected compressor lock-in temperature, or the

first-stage compressor output is de-energized for any

reason.

Defrost Temperature Termination Shunt (Jumper)

Pins--The defrost board selections are: 50, 70, 90, and

100°F (10, 21, 32 and 38°C). The shunt termination pin is

factory set at 50°F (10°C). If the temperature shunt is not

installed, the default termination temperature is 90°F

(32°C).

DELAY MODE

The defrost board has a field-selectable function to reduce

occasional sounds that may occur while the unit is cycling

in and out of the defrost mode. When a jumper is installed

on the DELAY pins, the compressor will be cycled off for 30

seconds going in and out of the defrost mode. Units are

shipped with jumper installed on DELAY pins.

NOTE -The 30 second off cycle is NOTfunctional when

jumpering the TEST pins.

Page 23

SPB*H4 SERIES

DISCHARGELINE

SENSOR

I"DEFROST BOARD

DEFROST SENSOR HARNESS

SENSOR

GREASE BETWEEN

RETURN BEND AND

SENSOR

SPB*H4-036

COIL SENSOR - 7

TUBES UP FROM

BOTTOM (6-1/2")

SPB*H4-060

COIL SENSOR - 12

TUBES UP FROM

BOTTOM (11-1/2")

SPB*H4-048

COIL SENSOR - 13

TUBES UP FROM

BOTTOM (12-1/2")

CLIP COIL TEMPERATURE SENSOR FROM THE DEFROST BOARD

ON THE RETURN BEND SHOWN.

Figure 35. Sensor Locations

OPERATIONAL DESCRIPTION

The defrost control board has three basic operational

modes: normal, defrost, and calibration.

•Normal Mode--The demand defrost board monitors

the O line, to determine the system operating mode

(heat/cool), outdoor ambient temperature, coil

temperature (outdoor coil) and compressor run time to

determine when a defrost cycle is required,

• Calibration Mode--The board is considered

uncalibrated when power is applied to the board, after

cool mode operation, or if the coil temperature

exceeds the termination temperature when it is in heat

mode,

Calibration of the board occurs after a defrost cycle to

ensure that there is no ice on the coil. During

calibration, the temperature of both the coil and the

ambient sensor are measured to establish the

temperature differential which is required to allow a

defrost cycle.

• Defrost Mode--The following paragraphs provide a

detailed description of the defrost system operation,

DETAILED DEFROST SYSTEM OPERATION

The demand defrost control board initiates a defrost cycle

based on either frost detection or time.

Frost Detection--If the compressor runs longer than 34

minutes and the actual difference between the clear coil

and frosted coil temperatures exceeds the maximum

difference allowed by the control, a defrost cycle will be

initiated,

AIMPORTANT

Time--If 6 hours of heating mode compressor run time

has elapsed since the last defrost cycle while the coil

temperature remains below 35°F (2°C), the demand

defrost control will initiate a defrost cycle,

Actuation--When the reversing valve is de-energized,

the Y1 circuit is energized, and the coil temperature is

below 35°F (2°C), the board logs the compressor run time.

If the board is not calibrated, a defrost cycle will be initiated

after 34 minutes of heating mode compressor run time,

The control will attempt to self-calibrate after this (and all

other) defrost cycle(s),

Calibration success depends on stable system

temperatures during the 20-minute calibration period. If

the board fails to calibrate, another defrost cycle will be

initiated after 90 minutes of heating mode compressor run

505330M 02/08

Page 24

time.Oncethedefrostboardis calibrated,it initiatesa

demanddefrostcyclewhenthedifferencebetweenthe

clear coil and frostedcoil temperaturesexceedsthe

maximumdifferenceallowedby thecontrolORafter6

hoursof heatingmodecompressorruntimehasbeen

loggedsincethelastdefrostcycle.

Termination--Thedefrostcycle endswhen the coil

temperatureexceedstheterminationtemperatureorafter

14minutesofdefrostoperation.Ifthedefrostisterminated

by the 14-minutetimer,anotherdefrostcyclewill be

initiatedafter34minutesof runtime.

TestMode--When Y1 is energized and 24V power is

being applied to the board, a test cycle can be initiated by

placing the termination temperature jumper across the

TEST pins for 2 to 5 seconds. If the jumper remains across

the TEST pins longer than 5 seconds, the control will

ignore the test pins and revert to normal operation. The

jumper will initiate one cycle per test.

Enter the TEST mode by placing a shunt (jumper) across

the TEST pins on the board after power-up. (The TEST

pins are ignored and the test function is locked out if the

shunt is applied on the TEST pins before power-up). Board

timings are reduced, the low-pressure switch is ignored

and the board will clear any active lockout condition.

Each test pin shorting will result in one test event. For

each TEST the shunt (jumper) must be removed for at

least one second and reapplied. Refer to flow chart (figure

36) for TEST operation.

Note: The Y1 input must be active (ON) and the 0 room

thermostat terminal into board must be inactive.

DEFROST BOARD DIAGNOSTICS

See table 9 to determine defrost board operational

conditions and to diagnose cause and solution to

problems.

Table 9. Defrost Control Board Diagnostic LEDs

DS2 DS1

Green Red Condition/Code Possible Cause(s) Solution

OFF OFF Power problem No power (24V) to board terminals R 1 Check control transformer power (24V).

& C or board failure. 2 If power is available to board and LED(s) do not

light, replace board.

Simultaneous Normal operation Unit operating normally or in standby None required.

SLOW Flash mode.

Alternating SLOW 5-minute anti-short cycle Initial power up, safety trip, end of None required (Jumper TEST pins to override)

Flash delay room thermostat demand.

Simultaneous Ambient Sensor Problem Sensor being detected open or shorted or out of temperature range. Board will revert to time/

FAST Flash temperature defrost operation. (System will still heat or cool).

Alternating Coil Sensor Problem Sensor being detected open or shorted or out of temperature range. Board will not perform

FAST Flash demand or time/temperature defrost operation. (System will still heat or cool).

ON ON Circuit Board Failure Indicates that board has internal component failure. Cycle 24 volt power to board. If code does

not clear, replace board.

FAULT & LOCKOUT CODES (Each fault adds 1 strike to that code's counter; 5 strikes per code = LOCKOUT)

OFF Low Pressure Fault

OFF

SLOW

Flash

SLOW

Flash

OFF

ON OFF

SLOW ON

Flash

FAST ON

Flash

OFF Fast

Flash

Fast OFF

Flash

Low Pressure LOCKOUT

High Pressure Fault

High Pressure LOCKOUT

Discharge Line Temperature

Fault

Discharge Line Temperature

LOCKOUT

Discharge Sensor Fault

Discharge Sensor

LOCKOUT

1 Restricted air flow over indoor or

outdoor coil.

2 Improper refrigerant charge in

system.

3 Improper metering device installed or

incorrect operation of metering

device.

4 Incorrect or improper sensor location

or connection to system.

1 Remove any blockages or restrictions from coils

and/or fans. Check indoor and outdoor fan motor for

proper current draws.

2 Check system charge using approach and subcooling

temperatures.

3 Check system operating pressures and compare to

unit charging charts.

4 Make sure all pressure switches and sensors have

secure connections to system to prevent refrigerant

leaks or errors in pressure and temperature

measurements.

This code detects shorted sensor or high discharge temperatures. If the discharge line temperature

exceeds a temperature of 300°F (148°C) during compressor operation, the board will de-energize

the compressor contactor output (and the defrost output if active). The compressor will remain off

until the discharge temperature has dropped below 225°F (107°C).

The board detects open sensor or out of temperature sensor range. This fault is detected by

allowing the unit to run for 90 seconds before checking sensor resistance. If the sensor resistance

Is not within range after 90 seconds, the board will count one fault. After 5 faults, the board will

lockout.

Page25

SPB*H4 SERIES

Short test pins for longer than 1

second but ess than 2.0 seconds

Clear any short cycle lockout and/

or 5-strike fault lockout function, if

applicable. No other functions will

be executed and unit will continue

in the mode it was operating.

Y1 Active ("0" line inactive) /

Short test pins for more than 2.0 seconds

I,finCOO',.GModeI

Clear any short cycle lockout or 5-strike fault

lockout function, if applicable.

Mode ] I,finO .OSZMode

No further test mode

operation will be

executed until the test

short is removed and

Lreapp ed.

The controller will check for ambient and I The unit will terminate defrost and I

coil faults (open or shorted). If a fault enter Heat Mode uncalibrated with I

exists, the unit will remain in Heat Mode defrost timer set for 34 minute test.

and no further test mode operation will be I No further test mode operation will I

executed until the test short is removed be executed until the test short is I

and re applied. If no fault exists, the unit will removed and reapp ed.

go nto Defrost mode. It

Test pin short REMAINS in place for more than 5 seconds

The unit will return to Heat mode uncalibrated with defrost timer set for

34 minutes. No further test mode operation will be executed until the

test short s removed and re app ed.

Test pins short REMOVED before a

max mum of 5 seconds

The unit will remain in Defrost mode until

termination on time or temperature

Figure 36. Test Mode Operation

kWARNING I

Before the start of each heating and cooling season, the

following service checks should be performed by a

qualified service technician. First, turn off electrical power

to the unit prior to performing unit maintenance.

• Inspect and clean the outdoor and indoor coils. The

outdoor coil may be flushed with a water hose.

NOTE -It may be necessary to flush the outdoor coil more

frequently if it is exposed to substances which are

corrosive or which block airflow across the coil (e.g., pet

urine, cottonwood seeds, etc.)

• Visually inspect the refrigerant lines and coils for leaks.

• Check wiring for loose connections.

• Check voltage at the indoor and outdoor units (with

units operating).

• Check the amperage draw at the outdoor fan motor,

compressor, and indoor blower motor. Values should

be compared with those given on unit nameplate.

• Check, clean (or replace) indoor unit filters.

• Check the refrigerant charge and gauge the system

pressures.

• Check the condensate drain line for free and

unobstructed flow; clean, if necessary.

• 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.

• Check drive belt for wear and proper tension.

NOTE -If owner reports insufficient cooling, the unit should

be gauged and refrigerant charge checked. Refer to section

on refrigerant charging in this instruction.

Refer to the Engineering Handbook for optional

accessories that may apply to this unit. The following may

or may not apply:

• Compressor monitor

• Compressor crankcase heater

• Mounting bases

• Stand-off Kit

• Sound cover

• Low ambient kit

• Mild ambient kit

• Monitor kit

• Two-stage Lennox Room Thermostat

505330M 02/08

Page 26

Inordertoensurepeakperformance,yoursystemmustbe

properlymaintained.Cloggedfiltersandblockedairflow

preventyourunitfromoperatingat itsmostefficientlevel.

1, Air Filter--AskyourLennoxdealertoshowyouwhere

yourindoorunit'sfilterislocated.Itwillbeeitheratthe

indoorunit(installedinternalorexternaltothecabinet)

orbehindareturnairgrilleinthewallorceiling.Check

thefiltermonthlyandcleanorreplaceitasneeded,

2, Disposable Filter--Disposablefilters should be

replacedwithafilterofthesametypeandsize,

NOTE -If you are unsure about the filter required for

your system, call your Lennox dealer for assistance.

IMPORTANT

3, Reusable Filter--Many indoor units are equipped

with reusable foam filters. Clean foam filters with a

mild soap and water solution; rinse thoroughly; allow

filter to dry completely before returning it to the unit or

grille.

NOTE -The filter and all access panels must be in place

any time the unit is in operation.

4. Electronic Air Cleaner--Some systems are

equipped with an electronic air cleaner, designed to

remove airborne particles from the air passing through

the cleaner. If your system is so equipped, ask your

dealer for maintenance instructions.

5. Indoor Unit--The indoor unit's evaporator 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 location of

the drain line and how to check for obstructions. (This

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

IMPORTANT

6, Outdoor Unit--Make sure no obstructions restrict

airflow to the outdoor unit, Leaves, trash or shrubs

crowding the unit cause the outdoor unit to work harder

and use more energy, Keep shrubbery trimmed away

from the unit and periodically check for debris which

collects around the unit,

When removing debris from around the unit, be aware

of metal edges on parts and screws, Although special

care has been taken to keep exposed edges to a

minimum, physical contact with metal edges and

corners while applying excessive force or rapid motion

can result in personal injury,

Cleaning of the outdoor unit's coil should be performed

by a trained service technician. Contact your dealer

and set up a schedule (preferably twice a year, but at

least once a year) to inspect and service your air

conditioning or heat pump system.

HEAT PUMP OPERATION

Your new Lennox heat pump has several characteristics

that you should be aware of:

• Heat pumps satisfy heating demand by delivering

large amounts of warm air into the living space, This

is quite different from gas- or oil-fired furnaces or an

electric furnace which deliver lower volumes of

considerably hotter air to heat the space.

• Do not be alarmed if you notice frost on the outdoor coil

in the winter months. Frost develops on the outdoor

coil during the heating cycle when temperatures are

below 45°F (7°C). An electronic control activates a

defrost cycle lasting 5 to 15 minutes at preset intervals

to clear the outdoor coil of the frost,

• During the defrost cycle, you may notice steam rising

from the outdoor unit. This is a normal occurrence. The

thermostat may engage auxiliary heat during the

defrost cycle to satisfy a heating demand; however,

the unit will return to normal operation at the

conclusion of the defrost cycle,

EXTENDED POWER OUTAGE

The heat pump is equipped with a compressor crankcase

heater which protects the compressor from refrigerant

slugging during cold weather operation,

If power to your unit has been interrupted for several hours

or more, set the room thermostat selector to the

EMERGENCY HEAT setting to obtain temporary heat

without the risk of serious damage to the heat pump,

In Emergency Heat mode, all heating demand is satisfied

by auxiliary heat; heat pump operation is locked out. After a

six-hour compressor crankcase warm-up period, the

thermostat can be switched to the HEAT setting and

normal heat pump operation may resume,

Page27

SPB*H4 SERIES

Though your thermostat may vary somewhat from the

description below, its operation will be similar,

TEMPERATURE SETTING LEVERS

Most heat pump thermostats have two temperature

selector levers: one for heating and one for cooling. Set the

levers or dials to the desired temperature setpoints for both

heating and cooling. Avoid frequent temperature

adjustment; turning the unit off and back on before

pressures equalize puts stress on the unit compressor,

FAN SWITCH

In AUTO or INT (intermittent) mode, the blower operates

only when the thermostat calls for heating or cooling, This

mode is generally preferred when humidity control is a

priority. The ON or CONT mode provides continuous

indoor blower operation, regardless of whether the

compressor or auxiliary heat are operating. This mode is

required when constant air circulation or filtering is desired.

SYSTEM SWITCH

Set the system switch for heating, cooling or auto

operation. The auto mode allows the heat pump to

automatically switch from heating mode to cooling mode to

maintain predetermined comfort settings, Many heat

pump thermostats are also equipped with an emergency

heat mode which locks out heat pump operation and

provides temporary heat supplied by the auxiliary heat,

INDICATING LIGHT

Most heat pump thermostats have an amber light which

indicates when the heat pump is operating in the

emergency heat mode.

TEMPERATURE INDICATOR

The temperature indicator displays the actual room

temperature,

PROGRAMMABLE THERMOSTATS

Your Lennox system may be controlled by a

programmable thermostat. These thermostats provide the

added feature of programmable time-of-day setpoints for

both heating and cooling, Refer to the user's information

manual provided with your particular thermostat for

operation details,

PRESERVlCE CHECK

If your system fails to operate, check the following before

calling for service:

•Check to see that all electrical disconnect switches are

ON.

• Make sure the room thermostat temperature selector

is properly set.

• Make sure the room thermostat system switch is

properly set,

• If you discover any blown fuses or tripped circuit

breakers, call your Lennox dealer for assistance,

• Make sure unit access panels are in place,

• Make sure air filter is clean,

• Locate unit model number and have it handy before

calling,

Job Name

Job Location

Installer

Unit Model No,

Nameplate Voltage

Rated Load Ampacity

Maximum Fuse or Circuit Breaker

Electrical Connections Tight?

Serial No.

Job no.

City

Compressor Amperage: 1st Stage

Indoor Filter clean? :_]

Indoor Blower RPM

COOLING (2ND STAGE)

Liquid Line Pressure:

HEATING (2ND STAGE)

Liquid Line Pressure: Vapor Pressure:

Vapor Pressure; 1st Stage: 2nd Stage:

Refrigerant Lines: - Leak Checked? _ Properly Insulated?

Service Valves: --- Fully Opened? _1 Caps Tight? _1

SEQUENCE OF OPERATION

Heating Correct? _ Cooling Correct?

S.P. Drop Over Indoor (Dry)

Vapor Pressure:

Date

State

Service Technician

2nd Stage:

Supply Voltage (Unit Off)

Outdoor Coil Entering Air Temp.

Refrigerant Charge Checked?

Outdoor Fan Checked?

Voltage With Compressor Operating

THERMOSTAT

Calibrated? Properly Set? _ Level?

505330M 02/08

Page 28

LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0806500

Navigation menu

Versions of this User Manual:

Views

Navigation