38YDB
WeatherMaker™ Two-Speed Split System
Heat Pump with Puron® Refrigerant
Installation and Start-Up Instructions
NOTE:
Read the entire instruction manual before starting the
installation.
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SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause death, personal injury, or property
damage. Consult a qualified installer, service agency, or your
distributor or branch for information or assistance. The qualified
installer or agency must use factory-authorized kits or accessories
when modifying this product. Refer to the individual instructions
packaged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses, protective clothing,
and work gloves. Use quenching cloth for brazing operations.
Have fire extinguisher available. Read these instructions thor-
oughly and follow all warnings or cautions included in literature
and attached to the unit. Consult local building codes and National
Electrical Code (NEC) for special requirements.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit and in instructions or
manuals, be alert to the potential for personal injury.
Understand the signal words DANGER, WARNING, CAUTION,
and NOTE. These words are used with the safety-alert symbol.
DANGER identifies the most serious hazards which will result in
severe personal injury or death.
WARNING signifies hazards which could result in personal injury
or death. CAUTION is used to identify unsafe practices which
would result in minor personal injury or product and property
damage. NOTE is used to highlight suggestions which will result
in enhanced installation, reliability, or operation.
Before installing, modifying, or servicing system, main elec-
trical disconnect switch must be in the OFF position. There
may be more than 1 disconnect switch. Lock out and tag
switch with a suitable warning label. Electrical shock can
cause personal injury or death.
Puron® (R-410A) systems operate at higher pressures than
standard R-22 systems. Be certain that service equipment is
rated for R-410A. Some R-22 service equipment may not be
acceptable. Check with your distributor.
INSTALLATION RECOMMENDATIONS
NOTE:
In some cases noise in the living area has been traced to
gas pulsations from improper installation of equipment.
1. Locate unit away from windows, patios, decks, etc. where unit
operation sound may disturb customer.
2. Ensure that vapor and liquid tube diameters are appropriate to
capacity of unit.
3. Run refrigerant tubes as directly as possible by avoiding
unnecessary turns and bends.
4. When passing refrigerant tubes through the wall, seal opening
with RTV or other pliable silicon-based caulk. (See Fig. 2.)
5. Avoid direct tubing contact with water pipes, duct work, floor
joists, wall studs, floors, and walls, and brick.
6. Do not suspend refrigerant tubing from joists and studs with a
rigid wire or strap which comes in direct contact with tubing.
(See Fig. 2.)
7. When necessary, use hanger straps which are 1 in. wide and
conform to shape of tubing insulation. (See Fig. 2.)
8. Isolate hanger straps from insulation by using metal sleeves
bent to conform to shape of insulation.
9. Ensure that tubing insulation is pliable and completely sur-
rounds vapor tube.
Outdoor unit contains system refrigerant charge for operation with
indoor unit of the same size when connected by 15 ft of
field-supplied or factory accessory tubing. For proper unit opera-
tion, check refrigerant charge using charging information located
on control box cover or in the Check Charge section of this
instruction.
IMPORTANT:
Maximum liquid-line size is 3/8–in. O.D. for all
residential applications.
IMPORTANT:
Only install the factory-supplied Puron® heat
pump (bi-flow) liquid line filter drier. Obtain replacement filter
driers from your local distributor.
Fig. 1—Model 38YDB
A98516
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Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1
4
Tab
5a 5a
PC 101
Catalog No. 533-80046
Printed in U.S.A.
Form 38YDB-3SI
Pg 1
11-01
Replaces: 38YDB-2SI