ACS
Series
21
The ACS Series heater is equipped to receive a gas supply line nipple of 3/8” NPT Schedule 40 metallic
pipe. All piping must be installed in accordance with the requirements outlined in the National Fuel Gas
Code ANSI/Z223.1 (latest edition) or CSA-B149.1. Support all gas supply piping with pipe hangers, metal
strapping, or other suitable material. Do not rely on the heater to support the gas pipe.
When connecting piping to the unit, the use of a thread joint compound is required. The thread compound
(pipe dope) shall be resistant to the action of liquefied petroleum gas or any other chemical constituents
of the gas to be conducted through the piping. Use of Teflon
®
tape is not permitted.
Install a ground joint union with a brass seat and a manual shutoff valve adjacent the unit for emergency
shutoff and easy servicing of controls. A 1/8” NPT plugged tap that is accessible for a test gauge connections
is also recommended, as illustrated in Figure 3.12.
A sediment trap must be installed in the supply line in the lowest spot prior to connecting to the heater. The
trap length shall be at least three inches long. Ideally, the trap would be installed a close as possible to the
shut off, as shown in Figure 3.12.
Figure 3.12
•
Recommended Hardware
•
Manual Shut Off and Sediment Trap
WARNING
!
Always use two (2) opposing wrenches to tighten mating pipe connections to
prevent excessive torque on the gas valve and manifold pipe. Excessive
torque can damage the valve and/or misalign the orifice, resulting in fire,
explosion, serious injury, or death.
3.0
Installation
•
Gas Supply Installation Instructions
•
Recommended Hardware
Sediment
Trap
1/8-in. NPT Test
Connection (Plugged)
Shut Off
Ground Joint
Union
Gas Supply Line
3 in.
Minimum
To U
nit
Flow of Gas
