LENNOX Air Conditioner/heat Pump(outside Unit) Manual L0806422

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

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INSTALLATION
INSTRUCTIONS

,?_2008 Lennox industries Inc,
Dallas, Texas, USA

Merit® Series13HPX Units
HEAT PUMP UNITS
505,325M
03/08
Supersedes 07/07

WARNING

A CAUTION

A IMPORTANT

IMPORTANT

_Technical
LLJJ

Publications

Litho U.S.A.

13HPX Outdoor Unit ...........................
Shipping and Packing List ......................
Unit Dimensions ...............................
General Information ...........................
Setting the Unit ...............................
Electrical .....................................
Refrigerant Piping .............................
Flushing Existing Line Set and Indoor Coil ........
Refrigerant Metering Device ....................
Manifold Gauge Set ...........................
Service Valves ................................
Leak Testing ..................................
Evacuation ...................................
Start-Up ......................................
Refrigerant Charge ............................
Checking Airflow ..............................
Setup for Checking and Adding Charge ..........
System Operation .............................
Defrost System ...............................
Maintenance ..................................
Optional Accessories ..........................
Homeowner Information ........................
Thermostat Operation ..........................
13HPX Check List .............................
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE

1
1
2
2
3
4
6
8
10
10
10
11
11
12
12
12
13
17
17
18
19
19
20
20

13HPX Merit ® outdoor units use HFC-410A refrigerant.
This unit must be installed with a matching indoor blower
coil and line set as outlined in the Lennox Engineering
Handbook. 13HPX outdoor units are designed for use in
expansion valve systems only. They are not designed to be
used with other refrigerant flow control devices. An expansion valve approved for use with HFC-410A must be ordered separately and must be installed prior to operating
the unit.

1 - Assembled 13HPX outdoor unit
Check the unit components for shipping damage. If you
find any damage, immediately contact the last carrier.

03/08

IIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Page 1

505,325M

IIIIIIIIIIIIIIIIIIIIIIIIIIIIII

,_lnletAir
4-3/8
(111)

Optional Unit Standoff Kit (4) (Fieldinstalled',

©

Coil Drain Outlets
(Around Perimeter
Of Base)

Inlet Air

Inlet Air

4-3/8
(111)

6-3/8

Vapor Line
Connection
Inlet Ai '_ru

4-3/8
(111)

(182)

Liquid Line
Connection

TOP VIEW

TOP VIEW BASE SECTION

Outdoor Coil Fan \

tDischarge

Compressor_

Vapor & Liquid
Optional Unit
Stand-off Kit (4)
(Field-installed)

Line Connections

L
2-3/4 (70)

SIDE VIEW
Model No.

A

B

13HPX-018
13HPX-024
13HPX-030
13HPX-036
13HPX-042

24-1/4
24-1/4
24-1/4
24-1/4
28-1/4

(616)
(616)
(616)
(616)
(616)

13HPX-048
13HPX-060

28-1/4 (718)
28-1/4 (718)

SIDE VIEW

3/4 (19)

33-1/4
33-1/4
29-1/4
33-1/4
33-1/4

When servicing or repairing HVAC components, ensure
caps and fasteners are appropriately tightened. Table 1
lists torque values for typical service/repair items.

C
(845)
(845)
(743)
(845)
(845)

37-1/4 (946)
43-1/4 (1099)

32-1/2
32-1/2
28-1/2
32-1/2
32-1/2

(826)
(826)
(724)
(826)
(826)

Table 1. Torque Requirements

36-1/2 (927)
42-1/4 (1073)

These instructions are intended as a general guide and do
not supersede national or local codes in any way. Consult
authorities having jurisdiction before installation.

Page 2
505325

03/08

Part

Recommended

Torque

Liquid service valve cap

8 ft.- lb.

Suction service valve cap

11 ft.- lb.

15 NM

Sheet metal screws

16 in.- lb.

2 NM

Machine screws #8

28 in.- lb.

3 NM

Compressor bolts

90 in.- lb.

10 NM

Gauge port seal cap

85ft.- lb.

7 NM

11 NM

WARNING

(AS

NOTED)

*A service clearance of 30" (702 mm) must be maintained on one
of the sides adjacent to the control box. Clearance to one of the
other three sides must be 36" (914 mm), Clearance to one of the
remaining two sides may be 12" (305 mm) and the final side may
be 6" (152 mm).
A clearance of 24" (610 mm) must be maintained between two
units, 48" (1219 mm) clearance required on top of unit, Maximum
soffit overhang is 36" (914 mm).

Figure 1 Installation Clearances
SLAB MOUNTING

CAUTION
Outdoor units operate under a wide range of weather conditions; therefore, several factors must be considered
when positioning the outdoor unit. Unit must be positioned
to give adequate clearances for sufficient airflow and servicing. A minimum clearance of 24 inches (610 mm) between multiple units must be maintained. Refer to figure 1
for installation clearances.

When installing the unit at grade level, the top of the slab
should be high enough above the grade so that water from
higher ground will not collect around the unit, See figure 2.
The slab should have a slope tolerance away from the
building of 2 degrees or 2 inches per 5 feet (51 mm per
1524 mm). This will prevent ice build-up under the unit during a defrost cycle. Refer to roof mounting section for barrier construction if the unit must face prevailing winter winds,
STRUCTURE

,

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. Mount 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 where drifting
will occur. 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. Ira support frame is constructed, it must not block drain holes
in unit base.
4. When installed in areas where low ambient temperatures exist, locate unit so winter prevailing winds do
not blow directly into outdoor 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.

DISCHARGE

AIR

I/I/I/I/I/
l/I/////

MOUNTING
SLAB MUST SLOPE
AWAY FROM BUILDING.

GROUNDLEVEL

Figure 2. Slab Mounting At Ground

Level

ROOF MOUNTING
Install unit a minimum of 6 inches (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,

Page 3
13HPX

SERIES

PREVAILING
WINTER
WINDS
I

©

WIND
BARRIER

.

I

NOTE - To facilitate conduit, a hole is in the bottom of
the control box. Connect conduit to the control box
using a proper conduit fitting.

INLET AIR

INLET AIR

NO TE - Units are approved for use only with copper
conductors.
24V, Class II circuit connections are
made in the low voltage junction box. Refer to figure 4
for field wiring diagram.

INLET AIR

0

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

0

NOTE - A complete unit wiring diagram is located inside the unit control box cover.
NOTE - For proper voltages, select thermostat wire
gauge per the following chart:

0
INLET AIR

Figure 3. Rooftop Application Wind Barrier
Construction
If unit coil cannot be mounted away from prevailing winter
winds, construct a wind barrier. Size barrier at least the
same height and width as the outdoor unit. Mount barrier
24 inches (610 mm) from the sides of the unit in the direction of prevailing winds.

.

.

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).

I

WARNING

Wire run length

AWG #

Insulation

type

less than 100' (30m)

18

color-coded, temperature

more than 100' (30m)

16

rating 35°C minimum

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.
Install low voltage wiring from outdoor to indoor unit
and from thermostat to indoor unit. See figures 6 and
7.
NOTE - 24V, Class II circuit connections are made in
the low voltage junction box.

OUAL
CAPACITOR

@_

@ ._.THERIIOST

AT

_C_

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II

.....

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208-230/60/I
mll 2

_

1,6ROUND

Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
1. Install line voltage power supply to unit from a properly
sized disconnect switch.

Page 4
505325

03/08

Z_

NOTEFOR USE WITH COPPER CONDUCTORS
ONLY.REFER
TO UNIT RATING
PLATE FOR MINIMUM
CIRCUIT
AUPACITY
AND MAXIMUM
OVERCURRENT
PROTECTION
SIZE
WARNING-

Z_

ELECTRIC
SHOCK HAZARD,
CAN CAUSE INJURYOR
DEATH.
UNIT MUST BE GROUNDED
IN ACCORDANCE
AND LOCAL CODES.

WITH

NATIONAL

Figure 4. Typical Field Wiring Diagram

OUTDOOR
FAN

DEFROST CONTROL

CAPACITOR

THERMOSTAT

FAN

PURPLE

ORANGE

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T

BLACK
BLACK

BLACK

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pOUT

RED

LO-PS
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BLACK
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COMPRESSOR

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GROUND
LUG

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THERMOSTATOEPROST
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DESCRIPTION

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