48TC
Single Package Rooftop
Gas Heating/Electric Cooling Unit
S i z e s 0 4 --- 0 7 w i t h P u r o n r (R---410A) Refrigerant
Installation Instructions
NOTE: Read the entire instruction manual before starting
the installation
TABLE OF CONTENTS
SAFETY CONSIDERATIONS 1....................
INSTALLATION 3...............................
Step 1 -- Plan for Unit Location 3..................
Step 2 -- Plan for Sequence of Unit Installation 4......
Step 3 -- Inspect unit 4...........................
Step 4 -- Provide Unit Support 4...................
Step 5 -- Field Fabricate Ductwork 6................
Step 6 -- Rig and Place Unit 6.....................
Step 7 -- Convert to Horizontal and Connect Duct work 7
Step 8 -- Install Outside Air Hood 7................
Step 9 -- Install Flue Hood 9......................
Step 10 -- Install Gas Piping 9.....................
Step 11 -- Install External Condensate Trap and Piping 11
Step 12 -- Make Electrical Conne ctions 12...........
Step 13 -- Adjust Factory--Installed Options 19........
Step 14 -- Install Accessories 19...................
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service,
maintenance, or use can cause explosion, fire, electrical
shock or other conditions which may cause personal
injury or propert y damage. Consult a qual ified installer,
service agenc y, or your distributor or branch for
information or assistance. The qualified installer or
agency must use factory--authorized kits or accessories
when modifying this product. Refer to the individual
instructions packaged with the kits or accessories when
installing.
Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloths for brazing operat ions and
have a fire extinguisher available. Read these instructi ons
thoroughly and follow all warni ngs or cautions attache d to
the unit. Consult local building codes and appropriate
national electrical codes (in USA, ANSI/NFPA70,
Nationa l Electrical Code (NEC); in Canada, CSA C22.1)
for special requirements.
It is important to recognize safety information. This is the
safety--alert symbol
. When you see this symbol on the
unit and in instructions or manuals, be alert to the
potential for personal injury.
Understand the signal words DANGER, WARNING,
CAUTION, and NOTE. These words are used with the
safety--alert symbol. DANGER identifies the most serious
hazards which will result in severe pe rsonal inj ury or
death. WARNING signifies hazards which could result in
personal injury or death. CAUTION is used to identify
unsafe practices, which may result in minor personal
injury or product and property damage. NOTE is used to
highlight suggestions which will result in enhanced
installation, reliability, or operation.
FIRE, EXPLOSION HAZARD
Failure to follow this warning could result i n personal
injury or death.
Disconnect gas piping from unit when leak testing at
pressure greater than 0.5 psig (3450 Pa). Pressures
great er than 0. 5 psig (3450 Pa) will cause gas valve
damage resulting in hazardous condition. If gas valve
is subjected to pressure greater than 0.5 psig (3450
Pa), it must be replaced before use. When pressure
testing field--supplied gas piping at pressures of 0.5
psig (3450 Pa) or less, a uni t connected to such piping
must be isolated by closing the manual gas valve.
!
WARNING
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could cause personal
injury or death.
Before performing service or maintenance operations
on unit, alwa ys turn off main power switch to unit and
install lockout tag. Unit may have more than one
power switch.
!
WARNING
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