Lennox Merit Series 13HPX User Manual

,?_2008 Lennox industries Inc,
Dallas, Texas, USA
INSTALLATION
INSTRUCTIONS
Merit® Series13HPX Units
HEAT PUMP UNITS _Technical
505,325M LLJJ Publications
03/08 Litho U.S.A.
Supersedes 07/07
WARNING
A CAUTION
A IMPORTANT
IMPORTANT
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
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.
03/08
IIIHIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
Page 1
505,325M
IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII

Lennox Merit Series 13HPX Specifications

General

Model	13HPX
Type	Heat Pump
SEER Rating	Up to 14
HSPF Rating	Up to 8.2
Compressor Type	Scroll
Refrigerant	R-410A
Stages	Single-stage
Warranty	5-Year Limited Parts

Summary

13HPX Outdoor Unit

Shipping and Packing List

Verify included items and check for shipping damage upon receipt.

Unit Dimensions

Setting the Unit

Slab Mounting Instructions

Guidance on slab installation, including proper slope and elevation for water drainage.

Electrical

Refrigerant Piping

New Line Set Plumbing Connections

Procedure for connecting new refrigerant lines and coils for optimal 13HPX system performance.

Brazing Connection Procedure

Flushing Existing Lines and Coil

Leak Testing

Evacuation

Start-Up

Refrigerant Charge

Setup for Checking and Adding Charge

Defrost System

Defrost Control

Details on the defrost control board, including timing pins and diagnostic indicators.

Maintenance

Outdoor Unit Maintenance

Cleaning and inspection steps for outdoor unit components and connections.

Indoor Unit Maintenance

Filter replacement or cleaning, and checking blower motor seals.

13HPX Check List