2
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Before performing service or maintenance operations
on unit, LOCK--OUT/TAGOUT the main power
switch to unit. Electrical shock and rotating equipment
could cause severe injury.
!
WARNING
ELECTRICAL OPERATION HAZARD
Failure to follow this warning could result in personal
injury or death.
Units with convenience outlet circuits can use
multiple disconnects. Check convenience outlet for
power status before opening unit for service. Locate
the disconnect switch and lock it in the open position
it. LOCK--OUT/TAGOUT this switch to notify others.
!
WARNING
UNIT OPERATION AND SAFETY HAZARD
Failure to follow this warning could cause personal
injury, death and/or equipment damage.
Puron (R--410A) refrigerant systems operate at higher
pressures than standard R--22 systems. Do not use
R--22 service equipment or components on Puron
refrigerant equipment.
!
WARNING
!
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. Pressures greater than
0.5 psig will cause gas valve damage resulting in haz-
ardous 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).
!
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this
warning could result in
death, serious personal
injury and/or property
damage.
Never use air or gases containing oxygen for leak testing
or for operating refrigerant compressors. Pressurized
mixtures of air or gases containing oxygen can lead to an
explosion.
!
WARNING
FIRE, EXPLOSION HAZARD
Failure to follow this
warning could result in
death, serious personal
injury and/or property
damage.
Never use non--certified refrigerants in this product.
Non--certified refrigerants could contain contaminates
that could lead to unsafe operating conditions. Use
ONLY refrigerants that conform to AHRI Standard
700.
UNIT DAMAGE HAZARD
Failure to follow this caution may result in reduced
unit performance or unit shutdown.
High velocity water from a pressure washer, garden
hose, or compressed air should never be used to
clean a coil. The force of the water or air jet will
bend the fin edges and increase airside pressure drop.
CAUTION
OPERATIONAL TEST ALERT
Failure to follow this ALERT can result in an
unnecessary evacuation of the facility.
Pressing the controller’s test/reset switch for longer
than seven seconds will put the duct detector into the
alarm state and activate all automatic alarm responses.
NOTICE
Summary of Contents for WeatherMaster 50HCQA04
Page 38: ...38 C10818 Fig 56 RTU OPEN Control Module ...
Page 78: ...78 APPENDIX V WIRING DIAGRAMS C150427 Fig 58 50HCQA04 A05 Control Wiring Diagram 575 3 60 ...
Page 80: ...80 APPENDIX V WIRING DIAGRAMS C160013 Fig 60 50HCQ 06 Control Wiring Diagram 575 3 60 ...
Page 84: ...84 APPENDIX V WIRING DIAGRAMS C150243 Fig 64 50HCQ 04 05 06 Power Wiring Diagram 208 230 1 60 ...
Page 85: ...85 APPENDIX V WIRING DIAGRAMS C12347 Fig 65 50HCQ 04 05 06 Power Wiring Diagram 208 230 3 60 ...
Page 86: ...86 APPENDIX V WIRING DIAGRAMS C12353 Fig 66 50HCQ 04 05 06 Power Wiring Diagram 460 3 60 ...
Page 87: ...87 APPENDIX V WIRING DIAGRAMS C12354 Fig 67 50HCQ 04 05 06 Power Wiring Diagram 575 3 60 ...
Page 91: ...91 APPENDIX V WIRING DIAGRAMS C12356 Fig 71 50HCQ 12 Power Wiring Diagram 460 3 60 575 3 60 ...
Page 92: ...92 APPENDIX V WIRING DIAGRAMS C150432 Fig 72 50HCQ PremierLink Control Diagram ...
Page 93: ...93 APPENDIX V WIRING DIAGRAMS C12359 Fig 73 50HCQ RTU Open Control Diagram ...