Brant Radiant Heaters HL2 series User Manual page 41

HL2 Series
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 piping. Use of Teflon
Install ground joint union with a brass seat and a manual shut-off valve adjacent to the unit for emergency
shut-off and easy servicing of controls. A 1/8" NPT plugged tap that is accessible for a test gauge
connection is also recommended, as illustrated in Figure 3.31.
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 as close as possible
to the shut-off, as shown in Figure 3.31.
Connect the main gas supply line with an approved flexible connector or, if the authority having jurisdiction
requires rigid piping, the use of approved swing joints may be used. If swing joints are utilized, the heater
must be allowed to freely expand and contract without causing undue stress on the gas pipe.
The heater shall not be connected to the building piping system with rigid pipe or semi-rigid metallic tubing,
including copper. When using such material, an intermediate connection device that allows for the heater
expansion must be used.
The gas outlet must be in the same room as the appliance is installed, and must be accessible. It may not
be concealed within or run through any wall, floor or partition. When installing the heater in a corrosive
environment (or near corrosive substances), use a gas connector suitable for the environment. Do not use
the gas piping to electrically ground the heater.
Installation of the Gas Line to the Heater
1
Install a sediment trap / drip leg if condensation may occur at any point of the gas supply line. This
will decrease the possibility of loose scale or dirt in the supply line entering the heater's control system
and causing a malfunction. NOTE: High pressure gas above 14 Inches W.C. (water column pressure)
requires a high pressure regulator and ball valve (optional).
2
Form the Type 1 hose connector (supplied) into a smooth U-shape allowing a maximum of 14 in.
between the flexible connector's end nuts (see Figure 3.31).
3
Attach the ball valve (optional) to the gas supply pipe. Apply pipe compound to NPT adapter threads
to seal the joint. Use only a pipe compound resistant to LP.
NOTE: Provide a 1/8 in. (.31 cm) NPT plugged tapping accessible for test gauge connection
immediately upstream of gas connection to the heater (provided an optional ball valve).
4
Attach the Type 1 hose connector to the adapter and burner control box inlet. Seal the joints.
NOTE: Excessive torque on the manifold may misalign the orifice. Always use two wrenches to
tighten mating pipe connections.
5
Final assembly must be tested for gas leaks according to CAN/CSA B149.1 Code and all local
codes and/or Standards.
When using a Type 1 flexible gas connector, do not attach the connector nuts directly to the gas pipe
supply. Connector nuts must be installed to an approved adapter.
® tape is not permitted.
!
CAUTION
41
3.0 Installation • Gas Supply