Payne PA1P048 Installation & Start-Up Instructions page 26

Pa1p and pa2p single packaged electric cooling units
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(060) 60HZ CHARGING
CHART
30
40
50
B0
70
80
90
5UOT]0N
LINE
TEMPERATURE (°F]
I
I
I
I
I
I
I
4
10
16
21
27
32
SUCTION LINE
rEMPERATURE ('C)
C99049
Fig. 27--Cooling
Charging
Chart,
PA2P060
Units
NOTE:
Refkr to the heating
aador
cooling
sequence
of operation
in this publication
as an aid in determining
proper
control
operation
S.
REFRIGERANT
CIRCUIT
Inspect
all rd'rigeraat
robing
connections
and the trait base _br oil accumulations
annually
Detecting
oil generally
indicates
a refiigerant
leak.
Z_
WARNING:
System
under
pressure.
Relieve
pressure
and recover
all refrigerant
before
system
repair
or final
unit
disposal
to avoid
personal
injury
or death.
Use all service
ports
and open
all flow-control
devices,
including
solenoid
valves.
If oil is detected
or if low cooling
performance
is suspected,
leak-test
all refi'igerant
robing
using
an electronic
teakodetector,
halide
torch,
or
liquid-soap
solution.
If a refi'igeraat
leak is detected,
refer to Check
for Ref?igerant
Leaks
section.
If no refl'igerant
leaks are found
and tow cooling
perfbrmance
is suspected,
refer to (becking
and Adiusting
Refl'igerant
Charge
section.
T.
EVAPORATOR
A_RFLOW
_he heating
and/or
cooling
air-flow
does not require
checking
unless
improper
performance
is suspected_
[f'ct/_'ob/_m
e._%'tx, be xz_t'e thE,# a[!
suppll-
as_d return-air
grilles
are opes_ and /7"ee.fi'om o/_strzzctions,
and that 117eair fi/ter
is c/eas_. When
necessary,
refer to Indoor
Airflow
and
Airflow
Adjustments
section
to check
the system
airflow.
U,
METERING
DEVICE
-- ACUTROL
DEVICE
This metering
device
is a fixed
orifice
and is located
in the header
to the evaporator
coil.
V.
LIQUID
LINE
STRAINER
_he liquid
line strainer
(to protect
metering
device)
is made
of wire mesh and located
in the liquid line on the inlet side of the metering
device.
TROUBLESHOOTING
Lse the 7>o_lb!e,shooth_gCoo/i*_g guide (see Table 10) if problems occur with these units
START-UP
CHECKUST
Lse the StartoL p checklist to ensure proper startoup procedures are %llowed
26

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