50HJ004---007
50HE003---006
Single---Package Rooftop Electric Cooling
Units with Optional Electric Heat
TABLE OF CONTENTS
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Installation Instructions
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SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can be
hazardous due to system pressure and electrical components.
1
Only trained and qualified service personnel should install, repair,
1
or service air-conditioning equipment.
2
Untrained personnel can perform basic maintenance functions of
cleaning coils and filters and replacing filters. All other operations
2
should be performed by trained service personnel. When working
2
on air-conditioning equipment, observe precautions in the
2
literature, tags and labels attached to the unit, and other safety
precautions that may apply.
2
Follow all safety codes. Wear safety glasses and work gloves. Use
2
quenching cloth for unbrazing operations. Have fire extinguishers
4
available for all brazing operations.
4
Recognize safety information. This is the safety- -alert symbol
8
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When you see this symbol on the furnace and in
instructions or manuals, be alert to the potential for personal
8
injury.
8
Understand the signal words DANGER, WARNING, and
8
CAUTION. These words are used with the safety- -alert symbol.
DANGER identifies the most serious hazards which will result in
29
severe personal injury or death. WARNING signifies a hazard
29
which could result in personal injury or death. CAUTION is used
to identify unsafe practices which may result in minor personal
29
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced installation,
29
reliability,or operation.
29
!
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ELECTRICAL SHOCK HAZARD
31
Failure to follow this warning could cause personal
injury or death.
34
Before performing service or maintenance operations
35
on unit, turn off main power switch to unit and install
36
lockout tag. Ensure electrical service to rooftop unit
agrees with voltage and amperage listed on the unit
41
rating plate.
58
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62
Unit is shipped in the vertical discharge configuration. To convert
67
to horizontal discharge application, remove duct opening covers.
72
Using the same screws, install covers on duct openings in
basepan of unit with insulation-side down. Seals around
openings must be tight. (See Fig. 1.)
1
WARNING
INSTALLATION
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