Goodman Mfg RHA''B'D User Manual
Heating
& Air Conditioning
(RHA**B*D/VHA**B*A)
®
Remote Heat Pump
Comfort. Quality. Trust.
Table of Contents
Safety Instructions .............................................................2
General ................................................................................3
SHIPPING AND HANDLING ............................................................. 3
LOCATION AND CLEARANCES ...................................................... 3
ROOFTOP INSTALLATIONS ............................................................ 3
APPLICATION NOTE ........................................................................ 3
Refrigerant Piping ..................................................... 3
REFRIGERANT VAPOR AND LIQUID LINE SIZING ....................... 3
REFRIGERANT VAPOR AND LIQUID LINE ROUTING ................... 4
SWEAT CONNECTIONS AT THE UNIT ........................................... 4
Safe Refrigerant Handling ................................................. 4
LEAK TESTING ................................................................................. 5
ID COIL AND LINE SETS EVACUATION.......................................... 5
Step 1. Confirm Proper Pump And Gauge Operation .............. 5
Step 2. Evacuate Lines And Indoor Coil. ................................. 6
Electrical Connections ....................................................... 7
WIRING ............................................................................................. 7
System Startup ...................................................................8
PRELIMINARY CHARGE ADJUSTMENT ......................................... 8
FINAL CHARGE ADJUSTMENT .......................................................8
Matching System ....................................................................... 8
AMANA-Approved Mix-Matched System Combinations ........... 8
ID COIL WITH EXPANSION VALVE ................................................. 8
ID COIL WITH ORIFICE .................................................................. 10
Troubleshooting ...............................................................10
Defrost System ....................................................... 10
Installation Instructions
Affix this manual, Specification Sheet and Users
Information Manual adjacent to the unit.
R
R
C
ATTENTION INSTALLING PERSONNEL
As a professional installer you have an obligation
to know the product better than the customer. This
includes all safety precautions and related items.
Prior to actual installation, thoroughly familiarize
yourself with this Instruction Manual. Pay special
attention to all safety warnings. Often during
installation or repair it is possible to place yourself
in a position which is more hazardous than when
the unit is in operation.
Part No. 10845809 Rev. 1
Printed in USA
RECOGNIZE THIS SYMBOL AS A SAFETY PRECAUTION.
Remember, it is your responsibility to install the
product safely and to know it well enough to be
able to instruct a customer in its safe use.
Safety is a matter of common sense...a matter of
thinking before acting. Most dealers have a list of
specific good safety practices...follow them.
The precautions listed in this Installation Manual
are intended as supplemental to existing practices.
However, if there is a direct conflict between existing
practices and the content of this manual, the
precautions listed here take precedence.
Goodman Company, L.P.
1810 Wilson Parkway • Fayetteville, Tennessee 37334
www.amana-hac.com
January 2003
Safety Instructions
RECOGNIZE SAFETY SYMBOLS, WORDS, AND LABELS
The following symbols and labels are used throughout this manual to indicate immediate or potential safety hazards. It
is the owner’s and installer’s responsibility to read and comply with all safety information and instructions accompanying
these symbols. Failure to heed safety information increases the risk of personal injury, property damage, and/or product
damage.
WARNING
WARNING - Hazards or unsafe practices which COULD result in severe personal injury or death.
CAUTION
CAUTION - Hazards or unsafe practices which COULD result in minor or moderate personal injury, product damage,
property damage.
WARNING
To avoid personal injury, shock, or death, ensure the electrical
disconnect switch(es) is (are) in the OFF position before installing,
modifying, or servicing the unit. Lock out and tag the switch with
a suitable warning label. Wiring must conform with NEC or CEC
and all local codes.
Safety Guidelines
1. Allow only qualified, experienced technicians to install or service this
unit.
2. Install the system in accordance with all local codes. If no local
codes exist, follow National Codes (NEC in the U.S., CEC in
Canada).
3. Open the electrical disconnect switch(es) before electrically connecting the unit.
4. Before operating the unit, be certain it is properly grounded.
5. The unit contains refrigerant gas under pressure. Avoid puncturing
or breaking any tubing.
6. Before operating the unit, complete the refrigerant connections.
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General
This manual covers only the installation of the remote heat
pump. See the unit specification sheet for information
regarding accessories.
SHIPPING AND HANDLING
Units are securely packed in shipping containers approved by the International Safe Transit Association. Check
the carton upon arrival for external damage. If damage is
found, file a request in writing for inspection by the carrier
agent immediately. The carrier is responsible for making
prompt inspection of damage and for a thorough investigation of each claim. The distributor or manufacturer will not
accept claims from dealers for transportation damage. If
no damage is found, carefully remove all shipping material
and properly dispose of it.
Keep the unit as upright as possible. Laying the unit on its
side or top could cause equipment damage.
LOCATION AND CLEARANCES
This unit is for outdoor installation only. The unit cannot be
completely enclosed. At least one side must be unrestricted. Refer to Figure 1 for clearances from the sides
and top of the unit to walls and other objects.
NOTE: These minimum clearances do not guarantee
adequate service access. Sufficient clearances for servicing the unit(s) must be provided.
If installing two or more units at the same location, allow at
least 24 inches between the units when using the 6”-12”12” guidelines in Figure 1. The space between two units
may be reduced to 12” if the clearances in Figure 1 are
increased to 12”-24”-24”.
MINIMUM CLEARANCES
12"
5'
12"
6"
DO NOT locate the unit:
– Directly under a vent termination for a gas appliance.
– Within 3 feet of a clothes drier vent.
– Where the refreezing of defrost water would create
a hazard.
– Where water may rise into the unit.
– Where the noise would prove to be a nuisance to the
customer (i.e. windows, patios, decks, etc.)
DO locate the unit:
– With the bottom of the unit at least three inches
above the maximum expected snow accumulation
level.
– In accordance with the minimum clearances described
in Figure 1.
– To minimize the length of refrigerant piping required.
– To provide adequate service clearances.
– On a level concrete pad (or other sturdy, weather
resistant platform).
– Isolated from the building structure to avoid transmis-
sion of vibrations.
NOTE: Short runs of refrigerant piping are better than long
runs. Locate the unit to provide safe access for future
maintenance and service. If possible, discuss unit location
with the owner before proceeding.
ROOFTOP INSTALLATIONS
Before installing this unit on a roof, ensure that the roof will
support the weight of the unit, its platform, and the service
personnel. For the unit weight, see the outdoor unit
specification sheet (all weights are approximate). If there
is doubt about the adequacy of the roof, contact a qualified
architect or structural engineer before installing the unit.
Ensure the unit is placed on a level, weather-resistant
platform.
APPLICATION NOTE
For proper performance, the indoor equipment and ductwork must be adequate for moving about 400 CFM of
indoor air for every ton of cooling capacity to be installed.
If they are not, modify the ductwork or indoor equipment
accordingly.
Refrigerant Piping
SIDE VIEW
Figure 1
REFRIGERANT VAPOR AND LIQUID LINE SIZING
See unit “Specification Sheet” for the required vapor and
liquid line tubing sizes. The listed sizes in the specification
sheet are suitable for line lengths of fifty feet or less and
indoor coil elevations of no more than forty feet above or
below the outdoor unit. NOTE: Unit performance is
affected by vapor line tubing size. A larger than required
vapor line tubing inhibits oil return to the unit. A smaller
than required vapor line tubing size decreases unit performance by up to 10%. If a run of more than fifty feet is
required, contact your Amana distributor for assistance.
Check the indoor coil liquid and vapor line diameter. A
bushing or coupling may be needed to match with the line
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sizes used. If mix-matching to a restrictor orifice indoor
coil, check the “Specification Sheet” for the proper orifice
size to be used with this outdoor unit. Piston orifices are
supplied with the outdoor unit.
Safe Refrigerant Handling
WARNING
REFRIGERANT VAPOR AND LIQUID LINE ROUTING
All of the vapor line must be insulated. The insulation must
include a vapor barrier.
The unit liquid line must be outside the vapor line insulation. If any part of the liquid line runs through an area that
will be hotter than 120°F, that part must be insulated.
Avoid burying refrigerant lines. If you must bury them, first
dig the trench so that it gradually slopes toward the
compressor (at least 1 inch per 10 feet). Then, insulate the
liquid and suction lines separately. Enclose all underground portions of the refrigerant lines in waterproof material (conduit or pipe). If the lines must pass under or
through a concrete slab, be sure they are adequately
protected.
• Seal the holes where the refrigerant piping enters
the building and support piping as necessary.
• Be careful not to kink or dent the refrigerant lines.
Kinked or dented lines will cause poor performance or compressor damage.
CAUTION
To prevent damage to the unit, a bi-flow
filter drier must be installed in the liquid
line.
Install the bi-flow line filter drier shipped with the unit near
the condensing unit or near the indoor coil. A new filter
drier (properly sized and rated for R-22) MUST be installed
with new outdoor units in order for the compressor warranty to remain valid. Any time the refrigeration system has
been opened for service, a new properly-sized bi-flow filter
drier rated for R-22 must be installed.
SWEAT CONNECTIONS AT THE UNIT
NOTE: When brazing, use a brazing alloy of 2% minimum
silver content. Do not use flux.
Before brazing connections, ensure the refrigerant line
ends are cut square, deburred, cleaned, free of nicks or
dents and round. Any other condition would increase the
chance of refrigerant leakage.
During brazing, wrap the component with a wet rag, or use
a thermal heat trap compound as directed by the compound manufacturer, to avoid overheating the service
valve, TXV valve, or filter drier while brazing.
After brazing, quench the joints with water or a wet cloth to
prevent overheating of the service valve. Inspect the paint
finish of the filter drier. The finish must be intact after
brazing. If the paint of the steel filter drier has been burned
or chipped, repaint or treat with a rust preventative. This
is especially important on suction line filter driers which are
continually wet during the unit operation.
To avoid possible explosion, death, or
injury; practice safe handling of
refrigerants.
While these items will not cover every conceivable situation, they should serve as a useful guide.
WARNING
Refrigerants are heavier than air. They can
“push out” the oxygen in your lungs or in
any enclosed space. To avoid possible
death or difficulty in breathing:
• Never sniff a refrigerant.
• Never purge refrigerant into an enclosed
room or space. In fact, all refrigerants
must, BY LAW, be recovered.
• If an indoor leak is suspected, thoroughly
ventilate the area before beginning work.
• Liquid refrigerant can be very cold. To
avoid possible frostbite or blindness,
avoid contact and wear gloves and
goggles. If liquid refrigerant does contact
your skin or eyes, get medical help
immediately.
• Always follow EPA regulations. Never
burn refrigerant, as poisonous gas will
be produced.
WARNING
To avoid possible explosion:
• Never apply flame or steam to a refrigerant
cylinder. If you must heat a cylinder for
faster charging, partially immerse it in
warm water.
• Never fill a cylinder more than 80% full of
liquid refrigerant.
• Never add anything other than R-22 an
R-22 cylinder.
• Store cylinders in a cool, dry place. Never
use a cylinder as a platform or a roller.
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