Carrier 48EZ(N)-A installation instructions Fire or Explosion Hazard, Sediment Trap

48EZ -- A

A1/8-in. (3.2 mm) NPT plugged tapping, accessible for test gauge connection, must be installed immediately upstream of the gas supply connection to the gas valve.

When installing the gas supply line, observe local codes pertaining to gas pipe installations. Refer to the NFGC NFPA 54/ANSI Z223.1 latest edition (in Canada, CAN/CGA 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 approved 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. Grade 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 appropriate straps, hangers, etc. Use a minimum of one hanger every 6 ft (1.8 m). For pipe sizes larger than 1/2 in., (12.7 mm) 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 liquedfied petroleum gases as specified by local and/or national codes. Never use Teflon tape.

4.Install sediment trap in riser leading to heating section (See Fig. 7). 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.

7.Pressure test all gas piping in accordance with local and national plumbing and gas codes before connecting piping to unit.

NOTE: Pressure test the gas supply system after the gas supply piping is connected to the gas valve. The supply piping must be disconnected from the gas valve during the testing of the piping systems when test pressure is in excess of 0.5 psig. Pressure test the gas supply piping system at pressures equal to or less than 0.5 psig. The unit heating section must be isolated from the gas piping system by closing the external main manual shutoff valve and slightly opening the ground-joint union.

!WARNING

FIRE OR EXPLOSION HAZARD

Failure to follow this warning could result in personal injury, death and/or property damage.

-Connect gas pipe to unit using a backup wrench to avoid damaging gas controls.

-Never purge a gas line into a combustion chamber. Never test for gas leaks with an open flame. Use a commercially available soap solution made specifically for the detection of leaks to check all connections.

-Use proper length of pipe to avoid stress on gas control manifold.

-If a flexible connector is required or allowed by authority having jurisdiction, black iron pipe shall be installed at furnace gas valve and extend a minimum of 2 in. (51 mm) outside furnace casing.

-If codes allow a flexible connector, always use a new connector. Do not use a connector which has previously serviced another gas appliance.

8.Check for gas leaks at the field-installed and factory-installed gas lines after all piping connections have been completed. Use a commercially available soap solution made specifically for the detection of leaks (or method specified by local codes and/or regulations).

IN

TEE

OUT

NIPPLE

CAP

C99020

Fig. 7 - Sediment Trap

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