Table of Contents
Advertisement
PLACE RIGGING STRAPS IN
BASEPAN SLOT (BELOW HANDHOLDS)
BEFORE RIGGING
UNIT 48GP
Size
024
030
036
042
048
060
Step 6—Connect Condensate Drain
NOTE: When installing condensate drain connection be sure to
comply with local codes and restrictions.
The 48GP units dispose of condensate water through a 3/4 in. NPT
fitting which exits through the compressor access panel. See Fig.
6 and 7 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 condensate trap at end of
condensate connection to ensure proper drainage. Make sure that
the outlet of the trap is at least 1 in. lower than the drain pan
condensate connection to prevent the pan from overflowing. See
Fig. 11. Prime the trap with water. When using a gravel apron,
make sure it slopes away from the unit.
If the installation requires draining the condensate water away
from the unit, install a 2-in. trap at the condensate connection to
ensure proper drainage. See Fig. 11. Make sure that the outlet of
the trap is at least 1 in. lower than the drain pan condensate
connection to prevent the pan from overflowing. Prime the trap
with water. 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. trap. Do not undersize the tube. Pitch the drain tube
downward at a slope of at least one in. for every 10 ft of horizontal
run. Be sure to check the drain tube for leaks.
1" MIN.
Fig. 11—Condensate Trap
A
B
1226.3
(48.28")
MAXIMUM WEIGHT
lb
kg
312
142
335
152
343
156
404
183
443
201
490
222
Fig. 10—Suggested Rigging
12
TRAP
OUTLET
2" MIN.
C99013
914-1371
(36"-54")
DUCTS
927.57
(36"-52")
SEAL STRIP MUST BE IN
PLACE BEFORE PLACING
UNIT ON ROOF CURB
A
in.
mm
22.0
558.5
22.0
558.5
22.0
558.5
23.0
584.2
21.5
546.1
23.5
596.9
Step 7—Install Flue Hood
The flue hood assembly is shipped screwed to the coil panel in the
indoor blower compartment. Remove the service access panel to
locate the assembly.
Dedicated low NOx 48GP models MUST be installed in Califor-
nia Air Quality Management Districts where a Low NOx rule
exists. These models meet the California maximum oxides of
nitrogen (NOx) emissions requirement of 40 nanograms/joule or
less as shipped from the factory.
NOTE: Low NOx requirements apply only to natural gas instal-
lations.
The venting system is designed to ensure proper venting. The
flue hood assembly must be installed as indicated in this
section of the unit installation instructions.
Install the flue hood as follows:
1. This installation must conform with local building codes and
with the National Fuel Gas Code (NFGC), ANSI Z223.1 (in
Canada, CAN/CGA B149.1, and B149.2) or NFPA (National
Fire Protection Association) latest revision. Refer to Provin-
cial and local plumbing or waste water codes and other
applicable local codes.
2. Remove flue hood from shipping location (inside the blower
compartment). Place vent cap assembly over flue panel. Orient
screw holes in vent cap with holes in the flue panel.
3. Secure flue hood to flue panel by inserting a single screw on
the right side and the left side 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. FPT
gas inlet on the manual shutoff or gas valve.
7
C99015
B
in.
mm
14.5
368.3
15.3
388.6
15.3
388.6
16.3
414.0
16.3
414.0
16.3
414.3
Advertisement
Table of Contents
