8
12
34
A07216
DETAIL A
(914 mm)
A08005
SMALL CABINET LARGE CABINET
Unit *
018 024 030 036
Unit *
042 048 060
lb kg lb kg lb kg lb kg lb kg lb kg lb kg
Rigging
Weight
350 158.8 361 163.7 373 169.2 407 184.6
Rigging
Weight
497 225.4 515 233.6 543 246.3
* For 460 volt units add 14 lb (6.35 kg) to the rigging weight.
Fig. 6 -- 577C Unit Suggested Rigging
Step 6 — Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
Model 577C disposes of condensate water through a 3/4 in. NPT
fitting which exits through the base on the evaporator coil access
side. See Fig. 3 & 4 for location.
Condensate water can be drained directly onto the roof in rooftop
installations (where permitted) or onto a gravel apron in ground
level installations. Install a field--supplied 2--in. (50.8 mm)
condensate trap at the end of condensate connection to ensure
proper drainage. Make sure that the outlet of the trap is at least 1 in.
(25.4 mm) lower than the drain--pan condensate connection to
prevent the pan from overflowing (See Fig. 7). Prime the trap with
water. When using a gravel apron, make sure it slopes away from
the unit.
Connect a drain tube using a minimum of 3/4--in. PVC or 3/4-- in.
copper pipe (all field --supplied) at the outlet end of the 2-- in. (50.8
mm) trap. Do not undersize the tube. Pitch the drain tube
downward at a slope of at least 1--in. (25.4 mm) for every 10 ft (3.1
m) of horizontal run. Be sure to check the drain tube for leaks.
TRAP
OUTLET
1-in. (25.4 mm) min.
2-in. (50.8 mm) min.
C00009B
Fig. 7 -- Condensate Trap
Step 7 — Install Flue Hood
The flue assembly is secured and shipped in the return air duct.
Remove duct cover to locate the assembly (See Fig. 9 and 10).
NOTE: Dedicated low NOx models MUST be installed in
California Air Quality Management Districts where a Low NOx
rule exists.
These models meet the California maximum oxides of nitrogen
(NOx) emissions requirements of 40 nanograms/joule or less as
shipped from the factory.
NOTE: Low NOx requirements apply only to natural gas
installations.
CARBON MONOXIDE POISONING HAZARD
Failure to follow this warning could result in personal
injury or death.
The venting system is designed to ensure proper venting.
The flue hood assembly must be installed as indicted in this
section of the unit installation instructions.
!
WARNING
Install the flue hood as follows:
1. This installation must conform with local building codes
and with NFPA 54/ANSI Z223.1 National Fuel Gas Code
(NFGC), (in Canada, CAN/CGA B149.1, and B149.2)
latest revision. Refer to Provincial and local plumbing or
wastewater codes and other applicable local codes.
2. Remove flue hood from shipping location (inside the return
section of the blower compartment--see Fig. 9 & 10). Re-
move the return duct cover to locate the flue hood. Place
flue hood assembly over flue panel. Orient screw holes in
flue hood with holes in the flue panel.
3. Secure flue hood to flue panel by inserting a single screw on
the top flange and the bottom flange of the hood.
Step 8 — Install Gas Piping
The gas supply pipe enters the unit through the access hole
provided. The gas connection to the unit is made to the 1/2--in.
(12.7 mm) FPT gas inlet on the gas valve.
Install a gas supply line that runs to the heating section. Refer to
the NFGC for gas pipe sizing. Do not use cast--iron pipe. It is
recommended that a black iron pipe is used. Check the local utility
for recommendations concerning existing lines. Size gas supply
piping for 0.5 in. wc maximum pressure drop. Never use pipe
smaller than the 1/2 --in. (12.7 mm) FPT gas inlet on the unit gas
valve.
577C
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