Detroit Radiant Products Company DR Series - Manual (Page 16)

DR Series Manual
16
The gas outlet must be in the same room as the appliance and accessible. It may not be concealed within
or run through any wall, floor or partition.
1 Install a sediment trap / drip leg if condensation may occur at any point of the gas supply line. This will
decrease the possibly 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 in. W.C.P. (water column pressure) requires
a high pressure regulator and ball valve (field supplied).
2
Form the stainless steel flexible connector (field supplied) into a smooth C-shape allowing 12 in.
between the flexible connector’s end nuts. Figure 2.5 on page 13. NOTE: Not for use on rigidly
mounted heaters.
3 Attach the ball valve (field supplied) to the gas supply pipe. Apply pipe compound to NPT adapter
threads to seal the joint. Use only a pipe compound resistant to liquid petroleum.
NOTE: Provide a 1/8 in. NPT plugged tapping accessible for test gauge connection immediately
upstream of gas connection to the heater (provided on ball valve, when supplied).
4 Attach the flexible connector to the adapter and gas 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 NFPA or local codes.
2.0 Installation • Gas Supply
CAUTION
!
The fittings (nuts) on the flexible connector must be connected to an adapter. They may not be
directly connected to the gas supply pipe.
WARNING
!
!
Testing for gas leaks with an open flame or other sources of ignition may lead to a fire
or explosion and cause serious injury or death. Test in accordance with NFPA or local
codes.
WARNING
!
An approved connector, suitable for the environment of equipment usage, is required.
Visible or excessive swaying, flexing and vibration of the gas connections
must be avoided
to prevent failure. Neither the gas pipe nor the connector shall be placed in the ‘flue
discharge area’. In no case shall the gas supply support the weight of the heater.
CAUTION
!
In high moisture or corrosive environments, use gas supply lines and connectors suitable for the
environment. Periodically inspect for signs of failure or leakage.