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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, CAUTION,
and INFORMATION labels attached to, or shipped with, unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such as bro-
ken lines, loose parts, or disconnected wires, etc.
b. Inspect for oil at all refrigerant tubing connections and
on unit base. Detecting oil generally indicates a refriger-
ant leak. Leak-test all refrigerant tubing connections
using electronic leak detector, halide torch, or liquid-
soap solution.
c. Inspect all field-wiring and factory-wiring connections.
Be sure that connections are completed and tight. Be
sure that wires are not in contact with refrigerant tubing
or sharp edges.
d. Inspect coil fins. If damaged during shipping and han-
dling, carefully straighten fins with a fin comb.
4. Verify the following conditions:
a. Make sure that condenser-fan blade are correctly posi-
tioned in fan orifice. See Condenser Fan Adjustment sec-
tion for more details.
b. Make sure that air filter(s) is in place.
c. Make sure that condensate drain trap is filled with water
to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose parts
have been removed.
START-UP, GENERAL
Unit Preparation
Make sure that unit has been installed in accordance with installa-
tion instructions and applicable codes.
In addition to the base unit start-up (unit with electro-mechanical
control), there are a few steps needed to properly start-up units
with optional direct digital controls (DDC). The DDC’s Service
Test function should be used to assist in the base unit start-up
and also allows verification of output operation. Controller con-
figuration is also part of start-up. This is especially important
when field accessories have been added to the unit. The factory
pre-configures options installed at the factory. There may also be
additional installation steps or inspection required during the
start-up process.
Additional Installation/Inspection
Inspect the field-installed accessories for proper installation,
making note of which ones do or do not require configuration
changes. Inspect the DDC Alarms for initial insight to any po-
tential issues. Refer to the Controls, Start-up, Operation and
Troubleshooting Instructions manual for the specific DDC. In-
spect the SAT sensor for relocation as intended during installa-
tion. Inspect special wiring as directed below.
Gas Piping
Check gas piping for leaks.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal injury or
death.
The unit must be electrically grounded in accordance with
local codes and NEC ANSI/NFPA 70 (American National
Standards Institute/National Fire Protection Association).
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result in death, serious
personal injury and/or property damage.
Disconnect gas piping from unit when pressure testing at
pressure greater than 0.5 psig (3450 Pa). Pressures greater than
0.5 psig will cause gas valve damage resulting in hazardous
condition. If gas valve is subjected to pressure greater than
0.5 psig, it must be replaced before use. When pressure testing
field-supplied gas piping at pressures of 0.5 psig or less, a unit
connected to such piping must be isolated by closing the
manual gas valve(s).
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