Lennox 13HPX-036, 13HPX-018, 13HPX-042, 13HPX-048, 13HPX-060 Installation Instructions Manual
...
INSTALLATION
,?_2008 Lennox industries Inc,
Dallas, Texas, USA
WARNING
A CAUTION
INSTRUCTIONS
Merit® Series13HPX Units
HEAT PUMP UNITS _Technical
505,325M LLJJ Publications
03/08 LithoU.S.A.
Supersedes 07/07
13HPX Outdoor Unit ........................... 1
Shipping and Packing List ...................... 1
Unit Dimensions ............................... 2
General Information ........................... 2
Setting the Unit ............................... 3
Electrical ..................................... 4
Refrigerant Piping ............................. 6
Flushing Existing Line Set and Indoor Coil ........ 8
Refrigerant Metering Device .................... 10
Manifold Gauge Set ........................... 10
Service Valves ................................ 10
Leak Testing .................................. 11
Evacuation ................................... 11
Start-Up ...................................... 12
Refrigerant Charge ............................ 12
Checking Airflow .............................. 12
Setup for Checking and Adding Charge .......... 13
System Operation ............................. 17
Defrost System ............................... 17
Maintenance .................................. 18
Optional Accessories .......................... 19
Homeowner Information ........................ 19
Thermostat Operation .......................... 20
13HPX Check List ............................. 20
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
A IMPORTANT
IMPORTANT
03/08
IIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
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 expan-
sion valve approved for use with HFC-410A must be or-
dered 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.
Page 1
505,325M
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Inlet Air
,_lnletAir
4-3/8
(111)
Optional Unit Stand-
off Kit (4) (Field-
installed',
©
InletAir
Ai'_ru Liquid Line
Inlet
Vapor Line
Connection
Connection
Coil Drain Outlets
(Around Perimeter
Of Base)
6-3/8
(182)
TOP VIEW TOP VIEW BASE SECTION
OutdoorCoil Fan \ tDischarge
Compressor_
4-3/8
(111)
4-3/8
(111)
SIDE VIEW
Model No. A C
13HPX-018 24-1/4 (616) 32-1/2 (826)
13HPX-024 24-1/4 (616) 32-1/2 (826)
13HPX-030 24-1/4 (616) 28-1/2 (724)
13HPX-036 24-1/4 (616) 32-1/2 (826)
13HPX-042 28-1/4 (616) 32-1/2 (826)
13HPX-048 28-1/4 (718) 36-1/2 (927)
13HPX-060 28-1/4 (718) 42-1/4 (1073)
3/4 (19)
B
33-1/4 (845)
33-1/4 (845)
29-1/4 (743)
33-1/4 (845)
33-1/4 (845)
37-1/4 (946)
43-1/4 (1099)
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.
Vapor & Liquid
Line Connections
Optional Unit
Stand-off Kit (4)
(Field-installed)
L
2-3/4 (70)
SIDE VIEW
When servicing or repairing HVAC components, ensure
caps and fasteners are appropriately tightened. Table 1
lists torque values for typical service/repair items.
Table 1. Torque Requirements
Part Recommended Torque
Liquid service valve cap 8 ft.- lb. 11 NM
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
505325 03/08
Page 2
WARNING
CAUTION
Outdoor units operate under a wide range of weather con-
ditions; therefore, several factors must be considered
when positioning the outdoor unit. Unit must be positioned
to give adequate clearances for sufficient airflow and servi-
cing. A minimum clearance of 24 inches (610 mm) be-
tween multiple units must be maintained. Refer to 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 posi-
tion 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 sup-
port frame is constructed, it must not block drain holes
in unit base.
4. When installed in areas where low ambient tempera-
tures 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.
(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
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 dur-
ing a defrost cycle. Refer to roof mounting section for barri-
er construction if the unit must face prevailing winter winds,
STRUCTURE DISCHARGE AIR
,
I/I/I/I/I/
l/I/////
MOUNTING SLAB MUST SLOPE
AWAY FROM BUILDING.
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 roof-
top applications,
GROUNDLEVEL
Page 3
13HPX SERIES
PREVAILINGWINTERWINDS
©
I WINDBARRIER I
INLET AIR INLET AIR
0 0
Figure 3. Rooftop Application Wind Barrier
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 direc-
tion 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).
INLET AIR
0
INLET AIR
Construction
.
Ground unit at unit disconnect switch or to an earth
ground.
NOTE - Tofacilitate conduit, a hole is in the bottom of
the control box. Connect conduit to the control box
using a proper conduit fitting.
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.
NOTE - A complete unit wiring diagram is located in-
side the unit control box cover.
NOTE - For proper voltages, select thermostat wire
gauge per the following chart:
Wire run length AWG # Insulation type
less than 100' (30m) 18 color-coded, temperature
more than 100' (30m) 16 rating 35°C minimum
.
Install room thermostat (ordered separately) on an in-
side wall approximately inthe 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.
WARNING
Refer to the furnace or blower coil installation instructions
for additional wiring application diagrams and refer to unit
nameplate for minimum circuit ampacity and maximum
overcurrent protection size.
1. Install line voltage power supply to unit from a properly
sized disconnect switch.
I
OUAL
CAPACITOR
Z_ NOTE-
FOR USE WITH COPPER CONDUCTORS ONLY.REFER TO UNIT RATING
PLATE FOR MINIMUM CIRCUIT AUPACITY AND MAXIMUM OVER-
CURRENT PROTECTION SIZE
WARNING-
ELECTRIC SHOCK HAZARD,
Z_ CAN CAUSE INJURYOR DEATH.
UNIT MUST BE GROUNDED IN ACCORDANCE WITH NATIONAL
AND LOCAL CODES.
Figure 4. Typical Field Wiring Diagram
@_ @ ._.-
_C_
--- @
THERIIOST AT
,_ II_j, I
_-_J_j II
..... .I
208-230/60/I
mll 2 _
1,6ROUND
505325 03/08
Page 4
OUTDOOR
FAN
PURPLE
BLACK
ORANGE
RED
LLOW
COMPRESSOR
CRANKCASE HEATER
BLACK
)_DUAL
CAPACITOR
BLACK
BLACK
DEFROST CONTROL
FAN
T
pOUT
LO-PS R 0
-_ O 0
COMMON
Y I BUT
YI
THERMOSTAT
o.r_.,o®e]
I I I t _
Iljll
----Jl II
J I I
J l
J
GROUND
LUG
THERMOSTATOEPROSTb _REVERSINGvALVE
LB20:B3OXBOZ';
"]_ _ IORANGF ¢_
T _ BLACK IS
I_._ b Ir- r_v _ I
EQUIPMENTHR' ]__A_ _L-_c_ SLACK KI_
r_ NOTE-
<EY COMPONENT PLATE FOR MINIMUM CIRCUIT
hi COMPRESSOR AMPACITY AND MAXIMUM OVER-
84- _OTOR-OUTDOOR FAN CURRENT PROTECTION SIZE.
CJ2 CAPACITOR- DUAL
CMCI CONTROL-DEFROST A
4RI hEATER-COMPRESSOR $41 TO BE MOUNTED IN
_11-1 :ONTACTOR-COMPREBBOR CONTROL BOX AND WIRED
L ¢ALVE=REVERSING IN PARALLEL WITH LOW
]4 _WITCH=HIGH PRESSURE PRESSURE SWITCH
_6 5W] TCH=DEFROST
540 THERMOSTAT-CRANKCASE
341 FHERMOSTAT=LOW AMBIEN_
_87 _WITCH=LOW PRESSURE
DESCRIPTION ONLY.REFER TO UNIT RATING
FOR USE WITH COPPER CONDUCTORS
HI=PS
CMC
FAN
__ I I I LOW
I I_)_ZENTpRESSU2#
208-230/60/I
IIL2 z_x
DLE
I,'BROUNO
LOW 587
o OUT
LO--PB
RO
OF L
COMMON yO
_OUT I
HI -PS
WARNING-
ELECTRIC SHOCK HAZARD,CAN CAUSE INJURY OR
DEATH. UNIT MUST BE GROUNDED IN ACCORDANCE
WITH NATIONAL AND LOCAL CODES,
-,,_-------DENOTES OPTIONAL COMPONENTS
-- -- -- CLASS I I VOLTAGE FIELD INSTALLED
II
'11
I I
CONNECTION MUST BE JUMPERED WHEN
OPTIONAL SWITCH IS NOT USED
LINE VOLTAGE FIELD INSTALLED
Figure 5. 13HPX Outdoor Unit Typical Wiring Diagram
Page 5
13HPX SERIES
Thermostat
power
common
(_) 1st. stage aux. heat
indoor blower .
reversing valve
compressor
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Indoor
Unit
-k_
@
Outdoor
Unit
power
common
1st. stage aux. heat _)
G
@
Model
-018
-024
-030
-O36
-042
-048
-060
Table 2. Refrigerant Line Sets
Field
Connections
Liquid Vapor
Line Line
3/8 in. 3/4 in
(10 mm) (19 mm)
3/8 in. 7/8 in
(10 mm) (22 mm)
3/8 in, 1-1/8 in.
(10 mm) (29 mm)
Recommended Line Set
Liquid Vapor L15
Line Line Line Sets
3/8 in. 3/4 in L15-41
(10 (19 15ft,- 50ft.
mm) mm) (4.6 m - 15
3/8 in. 7/8 in L15-65
(10 (22 15ft.- 50 ft.
mm) mm) (4.6 m - 15
3/8 in. 1-1/8
(10
mm) (29) Fabricated
in, Field
m)
m)
Figure 6.13HPX and Blower Unit Thermostat Desig-
nations
Indoor
Thermostat Unit
power
common ¢
L
emergency heat It
]
.power
_ common
emer.
Outdoor
Unit
I
I
1st. stage aux. heat _-
L
indoor blower
J outdoor t'stat
-lZ_st. stage aux. heat
@J
®l
reversing valve
®
compressor
(SOME CONNECTIONS MAY NOT APPLY. REFER TO
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Figure 7. Outdoor Unit and Blower Unit Thermostat
Designations (with auxiliary heat)
If the 13HPX 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 13HPX system, re-
fer to the following section that includes flushing proce-
dures,
Field refrigerant piping consists of liquid and vapor lines
from the outdoor unit (sweat connections) to the indoor coil
(flare or sweat connections).
Use Lennox L15 (sweat, non-flare) series line sets as
shown in table 2 or use field-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 2,
PLUMBING CONNECTIONS--13HPX MATCHED
WITH NEW INDOOR COIL AND LINE SET
If you are replacing an existing coil that is equipped with a
liquid line functioning as a metering orifice, replace the liq-
uid line prior to installing the 13HPX unit, See table 2.
NOTE - Units are designed for line sets of up to fifty feet (15
m); for longer lengths, consult the Lennox Refrigerant Pip-
ing Guide (Corp. 9351-L9). Select line set diameters from
table 2 to ensure that oil returns to the compressor.
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 ordi-
nances based on the unit's noise level observed from
the adjacent property, not from the installation proper-
ty. Install the unit as far as possible from the property
line. When possible, do not install the unit directly out-
side a window. Glass has a very high level of sound
transmission. Figure 8 shows how to place the outdoor
unit and line set.
Install unit away
from windows.
Two 90 ° elbows
installed in line set will
line set vibration.
Figure 8. Unit Placement and Installation
2. Line Set Isolation--The following illustrations dem-
onstrate procedures which ensure proper refrigerant
line set isolation. Figure 9 shows how to install line sets
on horizontal runs. Figure 10 shows how to install line
sets on vertical runs. Figure 11 shows how to make a
transition from horizontal to vertical.
505325 03/08
Page 6
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