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THERMISTOR
CURVE
90
f
_
T
F
804
4
<
I
_
I
I
I
I
97°1
r
_
6°1 X
t
r
_ 301
m
_
r
_: 204
_
L_._
L
i
_,r
O
20
40
60
80
100
120
(-17.77)
(-6.67)
(4.44)
(15.56)
(26.67)
(37.78)
(48.89)
TEMPERATURE
°F (°C)
A08054
Fig. 14 -
Resistance
vs. Temperature
Chart
FINAL
CHECKS
IMPORTANT:
Before leaving
job, be sure to do the following:
1. Ensure
that
all wiring
is routed
away from
tubing
and
sheet metal
edges
to prevent
rub-through
or wire pinch-
ing.
2. Ensure
that all wiring
and tubing
is secure
in unit before
adding
panels
and covers.
Securely
fasten
all panels
and
covers.
3. Tighten
service
valve
stem caps to 1/12-turn
past finger
tight.
4. Leave
Users
Manual
with
owner.
Explain
system
opera-
tion and periodic
nmintenance
requirements
outlined
in
nmnual.
5. Fill out Dealer Installation
Checklist
and place in customer
file.
CARE
AND MAINTENANCE
For
continuing
high
perfornmnce
and
to
minimize
possible
equipment
failure,
periodic
nmintenance
must
be performed
on
this equipment.
Frequency
of nmintenance
nmy vary depending
upon geographic
areas,
such
as
coastal
applications.
See
Users
Manual
for
infornmtion.
PURON®
(R-410A)
QUICK
REFERENCE
GUIDE
• Puron refrigerant
operates
at 50-70
percent
higher pressures
than R-22.
Be sure that servicing
equipment
and replacement
components
are designed
to operate
with Puron
• Puron refrigerant
cylinders
are rose colored.
• Recovery
cylinder
service pressure
rating nmst be 400 psig, DOT 4BA400
or DOT BW400.
• Puron systems
should be charged with liquid refrigerant.
Use a commercial
type metering
device in the nmnifold
hose when charging
into suction
line with compressor
operating
• Manifold
sets should be 700 psig high side and 180 psig low side with 550 psig low-side
retard.
• Use hoses with 700 psig service pressure
rating.
• Leak detectors
should be designed
to detect HFC refrigerant.
• Puron,
as with other HFCs, is only compatible
with POE oils.
• Vacuum
pumps will not remove
moisture
from oil.
• Do not use liquid-line
filter driers with rated working
pressures
less than 600 psig.
• Do not leave Puron suction
line filter driers in line longer than 72 hours.
• Do not install a suction-line
filter drier in liquid line.
• POE oils absorb moisture
rapidly.
Do not expose
oil to atmosphere.
• POE oils nmy cause danmge
to certain plastics
and roofing
nmterials.
• Wrap all filter driers and service valves with wet cloth when brazing.
• A factory approved
liquid-line
filter drier is required
on every unit.
• Do NOT use an R-22 TXV.
• If indoor
unit is equipped
with an R-22
TXV or piston metering
device, it must be changed
to a hard shutoff
Puron TXV.
• Never open system to atmosphere
while it is under a vacuum.
• When system must be opened
for service,
recover
refrigerant,
evacuate
then break vacuum
with dry nitrogen
and replace filter driers.
Evacuate
to 500 microns
prior to recharging.
• Do not vent Puron into the atmosphere.
• Do not use capillary
tube coils.
• Observe
all warnings,
cautions,
and bold text.
• All indoor coils must be installed
with a hard shutoff Puron TXV metering
device.
Copyright
2011 Carrier Corp, • 7310 W, Morris St. •
Indianapolis,
IN 46231
Printed in U,S,A,
Edition
Date: 08/11
Manufacturer
reserves
the right to change, at any time, specifications
and designs without notice and without obligations,
Catalog
No: 25HNB5-2SI
Replaces:
25HNB5-
lSl
12
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