Carrier 48XL Provide for Condensate Disposal, Install Flue Hood, Install Gas Piping

Supply Duct Cover

A06320

Fig. 8 - 48XL with Duct Covers On

Provide for Condensate Disposal

NOTE: Ensure that condensate-water disposal methods comply

with local codes, restrictions, and practices.

The units dispose of condensate through a 3/4 -in. NPT female

fitting that exits on the compressor end of the unit. 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. (25 mm) lower than the

drain-pan condensate connection to prevent the pan from

overflowing. 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 field-supplied 2-in. (51 mm) trap at the

condensate connection to ensure proper drainage. Condensate trap

is available as an accessory or is field-supplied. Make sure that the outlet of the trap is at least 1 in. (25 mm) lower than the unit

drain-pan condensate connection to prevent the pan from

overflowing. Connect a drain trough using a minimum of

field-supplied 3/4 -in. PVC or field-supplied 3/4 -in. copper pipe at outlet end of the 2 -in. (51 mm) trap (See Fig. 9). Do not

undersize the tube. Pitch the drain trough downward at a slope of at least 1 in. for every 10 ft. (3 m) of horizontal run. Be sure to check

the drain trough for leaks. Prime the trap at the beginning of the cooling season start-up.

Install Flue Hood

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 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), NFPA

54/ANSI Z223.1 (in Canada, CAN/CSA B149.1, and

B149.2) or latest revision. Refer to provincial and local

plumbing or wastewater codes and other @plicable local codes.

2.Remove flue hood from shipping location (inside the return

section of the blower compartment-See Fig. 8). Remove the

return duct cover to locate the flue hood. Remove two screws on flue panel. 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 and the bottom of the hood.

1" (25 mm) MIN.

__ 2" (51 mm) MIN

A08001

Fig. 9 - Condensate Trap

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 l/2-in. FPT gas inlet on the gas valve.

Install a gas supply line that runs to the heating section. Refer to Table 2 and the current edition of NFOC in the U.S. and the current

NSCNGPIC in Canada. 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. W.C. maximum pressure drop. Never use pipe

smaller than the l/2-in. FPT gas inlet on the unit gas valve.

For natural gas @plications, the gas pressure at unit gas connection must not be less than 4.0 IN. W.C. or greater than 13 IN. W.C.

while the unit is operating. For propane @plications, refer to

propane conversion kit instructions.

A 1/8-in. NPT plugged t@ping, accessible for test gauge

connection, must be installed immediately upstream of the gas

supply connection to the gas valve and downstream of manual

equipment shutoff valve.

When installing the gas supply line, observe local codes pertaining

to gas pipe installations. Refer to the NFPA 54/ANSI Z223.1-2006

(in Canada, CAN/CSA B149.1).

NOTE: In the state of Massachusetts:

1.Gas supply connections MUST be performed by a licensed plumber or gas fitter.

2.When flexible connectors are used, the maximum length shall not exceed 36 in. (915 mm).

3.When lever handle type manual equipment shutoff valves

are used, they shall be T-handle valves.

4.The use of copper tubing for gas piping is NOT @proved by the state of Massachusetts.

In the absence of local building codes, adhere to the following pertinent recommendations:

1.Avoid low spots in long runs of pipe. Grade all pipe 1/4 in.

(6.35 mm) for every 15 ft (4.6 m) of length to prevent traps.

Orade all horizontal runs downward to risers. Use risers to connect to heating section and to meter.

2.Protect all segments of piping system against physical and

thermal damage. Support all piping with @propriate straps, hangers, etc. Use a minimum of one hanger every 6 ft. (1.8

m). For pipe sizes larger than 1/2 in., follow

recommendations of national codes.

3.Apply joint compound (pipe dope) sparingly and only to

male threads of joint when making pipe connections. Use

only pipe dope that is resistant to action of liquefied petroleum gases as specified by local and/or national codes. Never use Teflon t@e.

4.Install sediment trap in riser leading to heating section (See

Fig. 10). This drip leg functions as a trap for dirt and condensate.

5.Install an accessible, external, manual main shutoff valve in gas supply pipe within 6 ft (1.8 m) of heating section.

6.Install ground-joint union close to heating section between

unit manual shutoff and external manual main shut off valve.

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