Maytag Amana VZC20, Installation & Service Reference

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5
T
O AVOID POSSIBLE EXPLOSION
,
USE ONLY RETURNABLE
(
NOT
DISPOSABLE
)
SERVICE CYLINDERS WHEN REMOVING REFRIGERANT FROM
A SYSTEM
.
• E
NSURE THE CYLINDER IS FREE OF DAMAGE WHICH COULD LEAD TO A
LEAK OR EXPLOSION
.
• E
NSURE THE HYDROSTATIC TEST DATE DOES NOT EXCEED
5
YEARS
.
• E
NSURE THE PRESSURE RATING MEETS OR EXCEEDS
400
PSIG
.
W
HEN IN DOUBT
,
DO NOT USE CYLINDER
.
WARNING
R
EFRIGERANTS ARE HEAVIER THAN AIR
. T
HEY CAN
“
PUSH OUT
”
THE
OXYGEN IN YOUR LUNGS OR IN ANY ENCLOSED SPACE
. T
O AVOID
POSSIBLE DIFFICULTY IN BREATHING OR DEATH
:
• N
EVER PURGE REFRIGERANT INTO AN ENCLOSED ROOM OR SPACE
. B
Y
LAW
,
ALL REFRIGERANTS MUST BE RECLAIMED
.
• I
F AN INDOOR LEAK IS SUSPECTED
,
THOROUGHLY VENTILATE THE AREA
BEFORE BEGINNING WORK
.
• L
IQUID REFRIGERANT CAN BE VERY COLD
. T
O AVOID POSSIBLE FROSTBITE
OR BLINDNESS
,
AVOID CONTACT AND WEAR GLOVES AND GOGGLES
. I
F
LIQUID REFRIGERANT DOES CONTACT YOUR SKIN OR EYES
,
SEEK MEDICAL
HELP IMMEDIATELY
.
• A
LWAYS FOLLOW
EPA
REGULATIONS
. N
EVER BURN REFRIGERANT
,
AS
P
OISONOUS GAS WILL BE PRODUCED
.
WARNING
T
O AVOID POSSIBLE EXPLOSION
:
•N
EVER APPLY FLAME OR STEAM TO A REFRIGERANT CYLINDER
. I
F YOU
MUST HEAT A CYLINDER FOR FASTER CHARGING
,
PARTIALLY IMMERSE
IT IN WARM WATER
.
•N
EVER FILL A CYLINDER MORE THAN
80%
FULL OF LIQUID
REFRIGERANT
.
•N
EVER ADD ANYTHING OTHER THAN
R-410A
TO A RETURNABLE
R-410A
CYLINDER
. T
HE SERVICE EQUIPMENT USED MUST BE LISTED
OR CERTIFIED FOR THE TYPE OF REFRIGERANT USE
.
•S
TORE CYLINDERS IN A COOL
,
DRY PLACE
. N
EVER USE A CYLINDER
AS A PLATFORM OR A ROLLER
.
WARNING
REFRIGERANT LINES
T
HE COMPRESSOR
PVE
OIL FOR
R-410A
UNITS IS EXTREMELY
SUSCEPTIBLE TO MOISTURE ABSORPTION AND COULD CAUSE
COMPRESSOR FAILURE
. D
O NOT LEAVE SYSTEM OPEN TO ATMOSPHERE
ANY LONGER THAN NECESSARY FOR INSTALLATION
.
CAUTION
Use only refrigerant grade (dehydrated and sealed) copper
tubing to connect the heat pump unit with the indoor unit.
After cutting the tubing, install plugs to keep refrigerant
tubing clean and dry prior to and during installation. Tubing
should always be cut square keeping ends round and free
from burrs. Clean the tubing to prevent contamination.
The liquid line must be insulated if more than 50 ft. of liquid
line will pass through an area that may reach temperatures
of 30 °F or higher than ambient in cooling mode and/or if
the temperature inside the conditioned space may reach a
temperature lower than ambient in heating mode. Never
attach a liquid line to any uninsulated potion of the suction
line.
Do NOT let refrigerant lines come in direct contact with
plumbing, ductwork, floor joists, wall studs, floors, and
walls. When running refrigerant lines through a foundation
or wall, openings should allow for sound and vibration
absorbing material to be placed or installed between tubing
and foundation. Any gap between foundation or wall and
refrigerant lines should be filled with a pliable silicon-
based caulk, RTV or a vibration damping material. Avoid
suspending refrigerant tubing from joists and studs with
rigid wire or straps that would come in contact with the
tubing. Use an insulated or suspension type hanger. Keep
both lines separate and always insulate the suction line.
Insulation is necessary to prevent condensation from
forming and dropping from the suction line. Armflex or
satisfactory equivalent with 3/8” min. wall thickness is
recommended. In severe conditions (hot, high humidity
areas) 1/2” insulation may be required. Insulation must
be installed in a manner which protects tubing and
connections from damage and contamination.
Where possible, drain as much residual compressor oil
from existing systems, lines, and traps; pay close attention
to low areas where oil may collect. NOTE: If changing
refrigerant, the indoor coil and metering device must be
replaced. Only AVPEC air handlers or TXV-V** expansion
valves are compatible and have been manufacturer
approved for use with these models. See unit specifications
or AHRI for an approved system match.
Line Set Length
Heat Pump Unit
(Tons) Suct Liq
2 3/4 3/8
3 7/8 3/8
4 1 1/8 3/8
5 1 1/8 3/8
0-250' Equivalent
INTERCONNECTING TUBING
Line Type & Line
Diameter (In. OD)
Burying Refrigerant Lines
If burying refrigerant lines can not be avoided, use the
following checklist:
1. Insulate liquid and suction lines separately.
2. Enclose all underground portions of the refrigerant
lines in waterproof material (conduit or pipe) sealing
the ends where tubing enters/exits the enclosure.
3. If the lines must pass under or through a concrete
slab, ensure lines are adequately protected and
sealed.