Carrier SYNERGY 38YD- User Manual
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Table of Contents:
- Page 2 – Step 5—Make Piping Connections; Fig. 2—Unit Reference Drawing
- Page 3 – Table 1—Refrigerant Connections and Recom-; UNIT; Fig. 3—Accessory Heat Pump Feet; Fig. 5—Positioning of Sensing Bulb; SENSING BULB
- Page 4 – Step 6—Make Electrical Connections; Fig. 6—Piping Installation; THROUGH THE WALL; Fig. 7—Line Power Connections
- Page 5 – Step 7—Install Electrical Accessories; If an LCC is desired, the low-speed airflow must be; Table 2—58MVP Airflow Selection
- Page 6 – Fig. 8—Typical Circuit Connections
- Page 7 – Step 9—Checking Charge; When the 2-speed unit is operating at low speed cooling,; SYSTEM FUNCTIONS; Cooling Operation
- Page 8 – Table 5—Ambient Temperatures for High- and; High Speed; Table 6—Function Light Code
- Page 9 – Fig. 11—LED And Potentiometer Location
- Page 10 – Table 8—Compressor PTC Ranges; COMPRESSOR INTERNAL PTC RESISTANCE
- Page 11 – WINDING; Mechanically Interlocked Contactors; CARE AND MAINTENANCE; Fig. 13—Header Pin Housing Configuration; Fig. 14—Resistance Values Versus Temperature; THERMISTOR CURVE
38YDA
Two-Speed Heat Pump
Installation and Start-Up Instructions
NOTE:
Read the entire instruction manual before starting the
installation.
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock, or other
conditions which may cause 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 pack-
aged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warnings or cautions attached to the unit. Consult local building
codes and the National Electrical Code (NEC) for special instal-
lation requirements.
Recognize safety information. This is the safety-alert symbol
.
When you see this symbol on the unit or in instructions and
manuals, be alert to the potential for personal injury.
Understand the signal word DANGER, WARNING, or CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards which will result in severe
personal injury or death. WARNING signifies hazards that 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.
Before installing or servicing system, always turn off main
power to system. There may be more than 1 disconnect
switch. Turn off accessory heater power if applicable. Elec-
trical shock can cause personal injury or death.
INSTALLATION
Step 1—Check Equipment and Jobsite
UNPACK UNIT — Move to final location. Remove carton taking
care not to damage unit.
INSPECT EQUIPMENT — File claim with shipping company
prior to installation if shipment is damaged or incomplete. Locate
unit rating plate on unit corner panel. It contains information
needed to properly install unit. Check rating plate to be sure unit
matches job specifications.
Step 2—Install on a Solid, Level Mounting Pad
If conditions or local codes require the unit be attached to pad,
tiedown bolts should be used and fastened through knockouts
provided in unit base pan. Refer to unit mounting pattern in Fig. 2
to determine base pan size and knockout hole location.
When installing, allow sufficient space for airflow clearance,
wiring, refrigerant piping, and service. Allow 30-in. clearance to
service end of unit and 48 in. above unit. For proper airflow, a 6-in.
clearance on 1 side of unit and 12 in. on all remaining sides must
be maintained. Maintain a distance of 24 in. between heat pumps.
Position so water, snow, or ice from roof or eaves cannot fall
directly on unit.
On rooftop applications, locate unit at least 6 in. above roof
surface. Where possible, place unit above a load-bearing wall.
Arrange supporting members to adequately support unit and
minimize transmission of vibration to building. Consult local
codes governing rooftop applications.
For proper unit operation and reliability, the outdoor unit
must be installed with the accessory balance port, hard
shut-off TXV. Do not install with evaporator coils having
capillary tube metering devices.
Step 3—Elevate Unit
For proper drainage, the heat pump must be raised off the
mounting surface. Fig. 3 shows unit with accessory heat pump feet
installed. Use accessory heat pump rack in areas where prolonged
subfreezing temperatures or heavy snow occur. Refer to separate
Installation Instructions packaged with accessories.
Step 4—Remove Indoor AccuRater® Piston
NOTE:
An accessory indoor thermostatic expansion valve (TXV)
is required. Refer to presale literature for proper part no.
After removing existing AccuRater from indoor coil, install
required accessory TXV kit. (See Fig. 4 and 5.) If unit is installed
Fig. 1—Model 38YDA
A92446
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. 563-763
Printed in U.S.A.
Form 38YDA-1SI
Pg 1
1-94
Replaces: 38YD-3SI
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Summary
with a FK4 or FC4 fan coil, no TXV change is necessary sincethese fan coils are factory-equipped with proper TXV. Install TXV kit to indoor coil as follows: 1. Install suction tube adapter. 2. Install liquid flare-to-sweat adapter. 3. Install TXV on liquid flare-to-sweat adapter. 4. Connect external...
In some cases noise in the living area has been traced to gaspulsations from improper installation of equipment. INSTALLATION RECOMMENDATIONS 1. Locate the unit away from windows. 2. Ensure that vapor and liquid tube diameters are appropriate to the capacity of the unit. (See Table 1.) 3. Run refrig...
Step 6—Make Electrical Connections To avoid personal injury or death, do not supply power to unitwith compressor terminal box cover removed. Be sure field wiring complies with local and national fire, safety,and electrical codes, and voltage to system is within limits shownon unit rating plate. Cont...
