55
PRE-START-UP
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.
3. Perform the following inspections:
a. Inspect for shipping and handling damages such as
broken 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
refrigerant leak. Leak-test all refrigerant tubing con-
nections using electronic leak detector, halide torch,
or liquid-soap solution.
c. Inspect all field-wiring and factory-wiring connec-
tions. Be sure that connections are completed and
tight. Be sure that all electrical 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. Ensure that condenser-fan blades are correctly posi-
tioned in fan orifice. See Outdoor Fan Adjustment fig-
ure on page 18 for more details.
b. Ensure all air filters are in place.
c. Ensure that condensate drain trap is filled with water
to ensuring proper drainage.
d. Ensure that all tools and miscellaneous loose parts
have been removed.
START-UP, GENERAL
In addition to the base unit start-up, there are a few steps need-
ed to properly start-up the controls. RTU-OPEN’s Service Test
function should be used to assist in the base unit start-up and
also allows verification of output operation. Controller config-
uration 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 RTU-OPEN’s Alarms for initial insight to
any potential issues. See troubleshooting section for alarms. In-
spect the SAT sensor for relocation as intended during installa-
tion. Inspect special wiring as directed in “Internal Wiring” on
page 56.
UNIT PREPARATION
Ensure the unit has been installed in accordance with installa-
tion instructions and applicable codes.
WARNING
PERSONAL INJURY HAZARD
Failure to follow this warning could result in personal inju-
ry or death.
1. Follow recognized safety practices and wear approved
Personal Protective Equipment (PPE), including safety
glasses and gloves when checking or servicing refrig-
erant system.
2. Do not use a torch to remove any component. System
contains oil and refrigerant under pressure. To remove
a component, wear PPE and proceed as follows:
a. Shut off all electrical power to unit. Apply appli-
cable lockout/tag-out procedures.
b. Recover refrigerant to relieve all pressure from
system using both high-pressure and low pressure
ports.
c. Do not use a torch. Cut component connection
tubing with tubing cutter and remove component
from unit.
d. Carefully un-sweat remaining tubing stubs when
necessary. Oil can ignite when exposed to torch
flame.
3. Do not operate compressor or provide any electric
power to unit unless compressor terminal cover is in
place and secured.
4. Do not remove compressor terminal cover until all
electrical power is disconnected and approved lockout/
tag-out procedures are in place.
5. Relieve all pressure from system before touching or dis-
turbing anything inside terminal box whenever refriger-
ant leak is suspected around compressor terminals.
6. Never attempt to repair a soldered connection while
refrigerant system is under pressure.
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal inju-
ry 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
PERSONAL INJURY AND ENVIRONMENTAL
HAZARD
Failure to follow this warning could cause personal injury
or death.
Relieve pressure and recover all refrigerant before system
repair or final unit disposal.
Wear safety glasses and gloves when handling refrigerants.
Keep torches and other ignition sources away from refriger-
ants and oils.
IMPORTANT: Follow the base unit’s start-up sequence as
described in the unit’s installation instructions.
Summary of Contents for WeatherMaker 50KCQ A04 Series
Page 34: ...34 Fig 53 RTU Open Overlay for Economizer Wiring ...
Page 35: ...35 Fig 54 VFD Overlay for W2770 Controller Wiring ...
Page 70: ...70 Fig C 50KCQ A04 A05 A06 Control Wiring Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 71: ...71 Fig D 50KCQ A04 A05 A06 Power Wiring Diagram 208 230 1 60 APPENDIX D WIRING DIAGRAMS ...
Page 72: ...72 Fig E 50KCQ A04 A05 A06 Power Wiring Diagram 208 230 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 73: ...73 Fig F 50KCQ A04 A05 A06 Power Wiring Diagram 460 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 74: ...74 Fig G 50KCQ A04 A05 A06 Power Wiring Diagram 575 3 60 APPENDIX D WIRING DIAGRAMS ...
Page 75: ...75 Fig H 50KCQ Premier Link Control Diagram APPENDIX D WIRING DIAGRAMS ...
Page 76: ...76 Fig I 50KCQ RTU Open Control Diagram APPENDIX D WIRING DIAGRAMS ...
