Pre-Start-Up; Check For Refrigerant Leaks; I1. Start-Up Cooling Section And - Payne PA1Z030 Installation, Start-Up And Service Instructions Manual

PRE-START-UP START-UP
Use the Start-Up Checklist supplied at the end of this book,
and proceed as follows:
I. CHECK FOR REFRIGERANT LEAKS
Locate and repair refrigerant leaks and charge tile unit as
follows:
1. Using both high and low pressure ports, locate leaks
and reclaim remaining refl'igerant to relieve system
pressure.
2. Repair leak following accepted practices.
NOTE: Install a filter drier whenever the system has been
opened for repair.
3. Check system for leaks using an approved method.
4. Evacuate refi'igerant system and reclaim refrigerant if
no additional leaks are found.
5. Charge unit with R-22 refrigerant, using a volumetric-
charging cylinder or accurate scale. Ret_r ro zmJt roth\q
pie*re _)z"Fequh'ect d_afge. Be sure to add extra refriger
ant to compensate for internal volume of field installed
filter drier.
II. START-UP COOLING SECTION AND MAKE
ADJUSTMENTS
Use the Start-Up Checklist supplied at the end of this book
and proceed as follows to inspect and prepare the unit for
initial start-up:
1. Remove all access panels.
2. Read and follow instructions on all WARNING, CAU
TION, and INFORMATION labels attached to, or shipped
with, unit.
Make the following inspections:
a. Inspect for shipping and handling damages such as
broken lines, loose parts, disconnected wires, etc.
b. Inspect for oil at all refl'igerant tubing connections
and on unit base. Detecting oil generally indicates a
refl'igerant leak. Leak test all refl'igerant tubing con
nections using electronic leak detector, or liquid
soap solution. If a refrigerant leak is detected, see
following Check for Refrigerant Leaks section.
c. Inspect all field and factory-wiring connections. Be
sure that connections are completed and tight.
d. Inspect coilfins. If damaged during shipping and han-
dling, carefldly straighten fins with a fin comb.
3. Verify the following conditions:
a. Make sure that outdoor-fan blade is correctly posi-
tioned in fan orifice. Top edge of blade should be
3.125 in. down fl'om condenser outlet grille. See Coil
denser Fan section on page 17.
b. Make sure that air filter is in place.
c. Make sure that condensate drain pan and trap are
filled with water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
A. Checking Cooling Control Operation
Start and check the unit for proper cooling control operation
as follows:
1. Place room thermostat SYSTEM switch in OFF posi
tion. Observe that blower motor starts when FAN switch
is placed in ON position and shuts down when FAN switch
is placed in AUTO. position.
2, Place SYSTEM switch in COOL position and FAN switch
in AUTO. position. Set cooling control below room tern
perature. Observe that compressor, condenser fan, and
evaporator blower motors start. Obselwe that cooling cycle
shuts down when control setting is satisfied.
3. When using an automatic changeover room thermostat,
place both SYSTEM and FAN switches in AUTO. posi-
tions. Observe that unit operates in Cooling mode when
temperature control is set to "call for cooling" (below room
temperature).
III. REFRIGERANT CHARGE
Amount of refrigerant charge is listed on unit nameplate (also
refer to Table 1).
Unit panels must be in place when unit is operating during
charging procedure.
A. No Charge
Use standard evacuating techniques. After evacuating sys
tern, weigh in the specified amount of refl'igerant (refer to
Table 1).
11