Lennox XP14 User manual

ze jv

,1_2008 Lennox industries Inc.

Dallas, Texas, USA

INSTALLATION

INSTRUCTIONS

XP14 Elite ®Series Units

HEAT PUMP UNITS _]_Technical

.ELL1 Publications

505,244M Litho U.S.A.

04108

Supersedes 11/07

RETAIN THESE INSTRUCTIONS

FOR FUTURE REFERENCE

WARNING

CAUTION

AIMPORTANT

XP14 Outdoor Unit ............................ 1

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

Unit Dimensions and Parts Arrangement ......... 2

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

Setting the Unit ............................... 3

Removing Panels ............................. 5

Electrical ..................................... 6

Refrigerant Piping ............................. 8

Flushing Existing Line Set and Indoor Coil ........ 10

Refrigerant Metering Device .................... 12

Manifold Gauge Set ........................... 13

Service Valves ................................ 13

Leak Testing .................................. 14

Evacuation ................................... 14

Start-Up ...................................... 15

Refrigerant Charge ............................ 15

Check Indoor Airflow before Charging ............ 15

Setup for Checking and Adding Charge .......... 16

Pre-Charge Maintenance Checks ................ 16

Weigh in Charge .............................. 17

Subcooling Charge ............................ 17

Defrost System ............................... 19

Maintenance .................................. 24

User Information .............................. 24

Start-up and Performance Checklist .............. 26

The XP14 outdoor unit uses HFC-410A HFC refrigerant.

This unit must be installed with a matching indoor blower

coil and line set as outlined in the Lennox Engineering

Handbook, Elite® Series XP14 outdoor units are designed

for use in check thermal expansion valve (CTXV) systems

only and are not to be used with other refrigerant flow

control devices. An expansion valve approved for use with

HFC-410A must be ordered separately and installed prior

to operating the unit,

1 - Assembled XP14 outdoor unit

Check the unit components for shipping damage. If you

find any damage, immediately contact the last carrier,

04/08

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII Page 1 505,244M

IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

RUN

DEFROST

REVERSING

SUCTION LINE VALVE HIGH PRESSURE

SWITCH

TOP VIEW

LIQUID LINE

CONNECTION

DISCHARGE AIR t

i i

SIDE VIEW

UNIT SUPPORT

FEET _/

_ _ 1(_413)

(

LIQUID LINE

CONNECTION

ELECTRICAL

INLETS

VAPOR LINE

/CONNECTION

4-1/4( 4-3/4

108) (121)

f _

9-1/2

(2il)

8-1/4

(210)

XP14-018 TO -030 BASE SECTION

FILTER DRIER/

LIQ

CONNECTIONS

PARTS ARRANGEMENT

VAPOR LINE

VAPOR VALVE AND

BAUGE PORT/SUCTION

LINE CONNECTIONS

B "-=

2(51)

I I I__._J

1 (25) SIDE VIEW

UNIT SUPPORT _

FEET\

18-7/8 @ @ ®

(429)

8-3/4

(222)

3-1/8

(79) _ (781)

26-7/8

(683)

3-3/4

(95)

_4-5/8

(117)

XP14-036 TO -060 BASE WITH

ELONGATED LEGS

Model No. A B C

xP14-018 31 (787) 27 (686) 28 (711)

xP14-024 31 (787) 27 (686) 28 (711)

xP14-030 35 (889) 27 (686) 28 (711)

xP14-036 31 (787) 35 1/2 (902) 39 1/2 (1003)

xP14-042 39 (991) 35 1/2 (902) 39 1/2 (1003)

xP14-048 39 (991) 35 1/2 (902) 39 1/2 (1003)

xP14-060 45 (1143) 35 1/2 (902) 39 1/2 (1003)

Page 2

505244M 04/08

WARNING 4. Locate the unit so prevailing winter winds will not blow

into the coil.

5. Locate unit away from overhanging roof lines which

would allow water or ice to drop on, or in front of, coil

or into unit.

These instructions are intended as a general guide and do

not supersede local codes in any way. Consult authorities

having 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

Part Recommended Torque

Service valve cap 8 ft.- lb. 11 NM

Sheet metal screws 16 in.- lb. 2 NM

Machine screws #8 16 in.- lb. 2 NM

Compressor bolts 90 in.- lb. 10 NM

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

CAUTION

Outdoor units operate under a wide range of weather

conditions; therefore, several factors must be considered

when positioning the outdoor unit.

Position the unit to allow adequate airflow and servicing

clearance. Maintain a minimum clearance of 24 inches

(610 mm) between multiple units as illustrated in figure 1

for installation clearances.

1. Place a sound-absorbing material, such as Isomode,

under the unit if it will be installed in a location or

position that will transmit sound or vibration to the

living area or adjacent buildings.

2. Install the unit high enough above ground or roof to

allow adequate drainage of defrost water and prevent

ice build-up.

3. In heavy snow areas, do not locate unit the where

snowdrifts will likely build. The unit base should be

elevated above the depth of average snows.

NOTE- Elevation of the unit may be accomplished by

constructing a frame using suitable materials. If a

support frame is constructed, it must not block drain

holes in unit base.

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),

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

two units.

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

Figure 1. Installation Clearances

SLAB MOUNTING

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 away from the building of 2

degrees or 2 inches per 5 feet (50 mm per 1500 mm) to

prevent ice build-up under the unit during a defrost cycle.

NOTE -If necessary for stability, anchor unit 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

[50 MM PER 1.5 M]) AWAY FROM BUILDING STRUCTURE. .....1

BU,LD,NG

STRUCTURE

MOUNTING_ --7-

SLAB

GROUND LEVEL

Figure 2. Slab Mounting Options

Page 3 XP14 SERIES

ELEVATING THE UNIT (SMALL-BASE UNITS)

If additional elevation is necessary, raise the unit by

extending the length of the unit support feet. This may be

done by cutting four equal true-cut lengths of Schedule

(SCH) 40, 4" (101.6mm) piping to the height required as

illustrated in figure 3,

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.

The inside diameter of the 4" (101.6mm) piping is

approximately 0,25" (6.35mm) greater than the

pre-installed feet on the unit. Devise a shim that will take up

the space and hold the extenders onto the feet during this

procedure, Small strips of 0,125" (3.175mm) thick

adhesive foam may be used, One or two small 1"

(25,4mm) square strips should be adequate to hold the

extender in place.

Base

Leg Detail 4" (101.6mm)

SCH 40 Piping

Figure 3. Elevated Slab Mounting using Feet

Extenders (Small Base Units)

ELEVATING THE UNIT (LARGER-BASE UNITS)

Unlike the small-base units which use round feet, the

larger-base units are outfitted with elongated feet as

illustrated in figure 4. which uses a similar method for

elevating the unit height,

If additional elevation is necessary, raise the unit by

extending the length of the unit support feet, This may be

done with 2" SCH 40 female threaded adapter. The

specified coupling will fit snuggly into the recess portion of

the feet. Use additional 2" SCH40 male threaded adaptors

which can be threaded into the female threaded adaptors

to make additional adjustments to the level of the unit,

NOTE -Keep the height of extenders short enough to

ensure a sturdy instaflation, 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.Smm)

SCH 40

Female Threaded

Adapter

Figure 4. Elevated Slab Mounting using Feet

Extenders (Larger Base Units)

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.

TYPICAL i-L

INSTALLATION __'-_

WITH 3 TO 4 IN.

EXTENDERS

INSTALLED _ BUILDING

IMPORTANT! STRUCTURE

ALWAYS USE MOUNTING _ ---FSTABILIZER

BRACKET ON SLAB

ELEVATED

INSTALLATIONS

STABILIZER

BRACKETS

GROUND LEVEL

Figure 5. Elevated Slab Mounting using Feet

Extenders

,& IMPORTANT

Page 4

505244M 04/08

With unit positioned at installation site, remove two side

Iouvered panels to expose the unit base pan. Install the

brackets as illustrated in figure 6 using conventional

)ractices; replace the panels after installation is complete,

#101/2" LONG

SELF-DRILLING SHEET

METAL SCREWS COIL

STABILIZING BRACKET

(18 GAUGE METAL - 2"

WIDTH; HEIGHT AS

REQ'D)

#101-1/4" LONG HEX

HD SCREW &

FLATWASHER

BASE PAN

PLASTIC ANCHOR - USE IF CONCRETE

(HOLE DRILL 1/4"); NOT IF PLASTIC SLAB

(HOLE DRILL 1/8").

lDeck Top

_J _ Mounting __

STABILIZING MINIMUM 1

PERS'DE\2 L

'I _:_ 'l'

ANGLE

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

2 BRACKETS PER SIDE, 2" FROM EACH CORNER.

Figure 6. Installing Stabilizer Brackets

(Slab Side Mounting)

ROOF MOUNTING

Install unit 6" (152 mm) above the roof surface to avoid ice

build-up around the unit. Locate the unit above a load

bearing wall or area of the roof that can adequately support

the unit, Consult local codes for rooftop applications.

If unit cannot be located away from prevailing winter winds,

construct a wind barrier sized at least the same height and

width as outdoor unit, Position barrier 24" (610 mm) from

the sides of the unit in direction of prevailing winds as

illustrated in figure 7,

prevailing winter winds

rwind barrier I

24"

inlet air ,_ _641'0 mm)

inlet al_

4_ inlet air

O inlet air

Figure 7. Rooftop Application with Wind Barrier

Remove the Iouvered panels as follows:

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

slightly as illustrated in figure 8,

2. Hold the panel firmly throughout this procedure.

Rotate bottom corner of panel away from hinge corner

post until lower three tabs clear the slots as illustrated

figure 8, Detail B.

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

slot in corner post as illustrated in figure 8, Detail A.

Position and Install Panel--Position the panel almost

parallel with the unit as illustrated in figure 9, Detail D on

page 6 with the screw side as close to the unit as possible,

Then, in a continuous motion:

• slightly rotate and guide the lip of top tab inward as

illustrated in figure 8, Details A and C; then upward into

the top slot of the hinge corner post,

• rotate panel to vertical to fully engage all tabs,

• holding the panel's hinged side firmly in place, close

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

holes,

When panel is correctly positioned and aligned, insert the

screws and tighten,

IMPORTANT! Do not allow panels to hang on unit by top tab. Tab

is for alignment and not designed to support weight of panel.

Panel shown slightly rotated to allow top tab to exit (or enter) top

slot for removing (or installing) panel.

SCREW

{OLES

LIP

Detail

iiiiiii+

ROTATE IN THIS DIRECTION;

THEN DOWN TO REMOVE PANEL

Figure 8. Removing/Installing Louvered Panels

(Details A, B and C)

Page 5 XP14 SERIES

MAINTAINMINIMUMPANELANGLE(ASCLOSETOPARALLELWITHTHEUNIT

ASPOSSIBLE)WHILEINSTALLINGPANEL.

HOLDDOORFIRMLYTOTHEHINGED

ANGLEMAYBETOO SIDETOMAINTAIN

EXTREME --_ FULLY_ENGAGEDTABS

PREFERREDANGLE

FORINSTALLATION

Detail D

Figure 9. Removing/Installing Louvered Panels

(Detail D)

CAUTION

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,

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

sized unit disconnect switch,

2. Ground the unit at the unit disconnect switch or to

earth ground.

3. To facilitate conduit, a hole is provided in the bottom of

the control box, Connect conduit to the control box

using a proper conduit fitting,

4. Units are approved for use only with copper

conductors. (A complete unit wiring diagram is

located inside the unit control box cover.)

LINE VOLTAGE

FIELD INSTALLED

WARNING! - ELECTRIC SHOCK HAZARD. Can cause INJU-

RY or DEATH, Unit must be grounded in accordance with

national and local codes.

Z,/iXXNOTE - For use with copper conductors only. Refer to unit

rating plate for minimum circuit ampacity and maximum over-

current protection size.

Figure 10. Outdoor Unit Typical Field Wiring

NOTE -For proper voltages, select thermostat wire

gauge per the following chart:

Table 2. Wire Run Lengths

Wire run length AWG # Insulation type

color-coded, temperature

rating 35°C minimum

less than 100' (30m) 18

more than 100' (30m) 16

5. 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 affected by sunlight, drafts or vibrations,

6. Install low voltage wiring from outdoor to indoor unit

and from thermostat to indoor unit, See figures 11 and

12 on page 7,

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

low voltage junction box,)

,WARNING

Page 6

505244M 04/08

24Vpower

common _ L

1st-stage FE

indoor blower

Thermostat Indoor Unit Outdoor Unit

......... ©1

1st-stage

auxiliary heat (_ I

®1

@comp....... GI

(SOME CONNECTIONS MAY NOT APPLY. REFER TO SPECIFIC

THERMOSTAT AND INDOOR UNIT.)

Figure 11. Outdoor Unit and Blower Unit Thermostat

Designations

Thermostat Indoor Unit Outdoor Unit

. 24V power 24V power

©c ........ 2®-..0 ........

',@ :'-:/- _ EMERGENCY

]I_) _ HEAT RELAY

(_. emergency heat i -- -- //_i OUTDOOR

THERMOSTAT

(_). 1st-stage 'auxiliary heat .(_ // 1st-stage

auxiliary h_t-- (_

k@"

indoor blower

reversing valve

compressor ®

(SOME CONNECTIONS MAY NOT APPLY. REFER TO SPECIFIC

THERMOSTAT AND INDOOR UNIT.)

Figure 12. Outdoor Unit and Blower Unit Thermostat

Designations (with Emergency Heat Relay)

CI2

CAPAC lTOR

"34O

HRI

AIOB

DEFROST CONTROL ;01L

_MB

)IS

if--,

I_f

iv v

s_r

HI_

PRESSORE

SWITCH

PRESSURE

SWITCH

AI08 I--

Q-

RT21 RTI5

DEFROST AMBIENT

COIL SENSOR

SENSOR

FOR _ WITH COPPER CONDUCTORS

ORLY.RERERTO UNIT RATIN6

PLATE FOR ¥INIMII_I CII_IIT

A_PACITY ANOgAXINUff OVER-

CtI_NT RqOTECTION SIZE

,6_ REFER TO COMPRESSORIN U_IT

OR DEATH.UNIT MI_T B_ OR(X/NOEDIN

_ITH NATION_. AND LOCALCO_S,

m_ SENSOR,OmOOOR_ve (_m_L)

r- -- --

I F----

.IJ

,r=, C831 lily

x_2av

_3)"1

._&,?_-- [.--.__

®-I----

-@-I----

OUT

OPS

f2 OUT

;0M

fl OUT

-PS

C_SSOR

CONTACTOR

REVERSING

VAL_

®A2 SIGNATURE

81MZ8

T_ISTED

-Jl'

-- --t-- d

--J

Figure 13. Typical XP14 Wiring

Page 7 XP14 SERIES

A IMPORTANT

If the XP14 unit is being installed with a new indoor coil and

line set, the plumbing connections should be made as

outlined in this section. If an existing line set and/or indoor

coil is going to be used to complete the XP14 system, refer

to the following section that includes flushing procedures.

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 3 or use

field-fabricated 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 3.

REFRIGERANT LINE CONNECTIONS - XP14

OUTDOOR UNIT MATCHED WITH NEW INDOOR

COIL AND LINE SET

If replacing an existing coil equipped with a liquid line

functioning as a metering orifice, replace the liquid line

prior to installing the XP14 unit. Line sets are described in

table 3.

Model

Table 3. Refrigerant Line Sets

Valve Field

Connections

Liquid Vapor

Line Line

-018 3/8 in. 3/4 in

-024 (10 mm) (19 mm)

-030

-036 3/8 in. 7/8 in

-042 (10 mm) (22 mm)

-048

3/8 in, 1-1/8 in.

-060 (10 ram) (29 ram)

Recommended Line Set

Liquid Vapor L15

Line Line Line Sets

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

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

mm) (4.6 m - 15 m)

3/8 in. L15-65

(10 7/8 in

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

(4.6 m - 15 m)

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

(10 (29 mm) Fabricated

mm)

NOTE -When installing refrigerant lines, refer to Lennox

Refrigerant Piping Guide (Corp. 9351-L9) or Lennox

Technical Support Department Product Appficafions

Group for assistance. In addition, be sure to consider the

following points:

•Select line set diameters from table 3 to ensure that oil

returns to the compressor.

• Unitsaredesignedforlinesetsofupto50feet(15m);

for longer line sets, consult piping guidelines.

• Size vertical vapor riser to maintain minimum velocity

at minimum capacity.

INSTALLING REFRIGERANT LINE

Pay close attention to line set isolation during installation of

any heat pump or a/c system. When properly isolated from

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

lines will not create unnecessary vibration and subsequent

noises. Also, consider the following when placing and

installing a high-efficiency outdoor unit:

1, Placement--Some localities are adopting sound

ordinances based on the unit's noise level observed

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. Figure 14 shows how to place

the outdoor unit and line set,

Install unit _ \_\

away from //

windows _

zz'.11111II I III I IIIrb---.

will reduce line set vibration.

Figure 14. Outside Unit Placement

2. Line Set Isolation--The following illustrations

demonstrate procedures which ensure proper

refrigerant line set isolation.

• Figure 15 on page 9 shows how to install line sets

on horizontal runs.

• Figure 16 on page 9 shows how to install line sets

on vertical runs.

• Figure 17 on page 10 shows how to make a

transition from horizontal to vertical

Page 8

505244M 04/08

To hang line set from joist or rafter,

use either metal strapping material

or anchored heavy nylon wire ties.

STRAPPING MATERIAL

(Around vapor line only)

8 feet

FLOOR JOIST OR

ROOF RAFTER

WIRE TIE

(Around vapor line only)

TAPE OR

8 feet WIRE TIE Strap the vapor line to the joist or

rafter at 8 ft. intervals then strap

the liquid line to the vapor line.

METAL FLOOR JOIST OR

SLEEVE ROOF RAFTER

TAPE OR WIRE TIE

Figure 15. Refrigerant Line Sets: Installing Horizontal Runs

NOTE -Similar installation practices should be used if line set is to be installed on exterior of outside wall.

OUTSIDE WALL IMPORTANT - Refrigerant

lines must not contact wall. VAPOR LINE LIQUID LINE

IMPORTANT!

Refrigerant

lines must

not contact

structure.

VAPOR LINE WRAPPED

[_ CAULK

PVC PiPE FIBERGLASS

iNSULATiON

-_. WIRE TIE

INSIDE WALL

- STRAP

SLEEVE

WIRE TIE

_" .---------WOOD BLOCK

.___---- WIRE TIE

STRAP

SLEEVE

Figure 16. Refrigerant Line Sets: Installing Vertical Runs (New Construction Shown)

Page 9 XP14 SERIES

ANCHORED

HEAVY NYLON

WIRE TIE

AUTOMOTIVE

MUFFLER-TYPE

HANGER

WALL

STUD WALL

STUD

Strap Liquid

Line To Va- Strap Liquid Line

por Line To Vapor Line

UID LINE LIQUID LINE

METAL VAPOR LINE - WRAPPED METAL VAPOR LINE - WRAPPED

SLEEVE IN ARMAFLEX SLEEVE IN ARMAFLEX

Figure 17. Refrigerant Line Sets: Transition from Vertical to Horizontal

WARNING NOTE -The tube end must stay bottomed in the fitting

during final assembly to ensure proper seating,

sealing and rigidity,

5. Install a field-provided check expansion valve

(approved for use with HFC-410A refrigerant) in the

liquid line at the indoor coil,

BRAZING 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, Flow dry nitrogen through the refrigerant piping while

making line set connections; this prevents carbon

deposits (oxidation) buildup on the inside of the joints

being brazed. Such buildup may restrict refrigerant

flow through screens and metering devices, To do this:

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

refrigeration gauge set into the Schrader port

connection on the vapor service valve and out of

the Schrader port connection on the liquid service

valve. (Metering device (CTXV and RFC) will

allow low pressure nitrogen to flow through the

system,)

While nitrogen is flowing, braze refrigerant line set

to the indoor and outdoor units, IMPORTANT" The

flow of nitrogen must have an escape path

other than through the joint to be brazed.

3. Use silver alloy brazing rods (5 or 6 percent minimum

silver alloy for copper-to-copper brazing or 45 percent

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

brazing) which are rated for use with HFC-410A

refrigerant,

4, Wrap a wet cloth around the valve body and the copper

tube stub to protect it from heat damage during

brazing. Wrap another wet cloth underneath the valve

body to protect the base paint,

XkIMPORTANT

kWARNING

Page 10

505244M 04/08

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