Detroit Radiant Products Company QTS Series - Manual (Page 27)

QTS Series
27
3.0 Installation • Gas Supply
CAUTION
!
When using a stainless steel flexible gas connector, do not attach the connector nuts directly to the
gas pipe supply. Connector nuts must be installed to an approved adapter.
The installation must conform with local building codes or, in the absence of such codes, the National Fuel
Code (NFPA 54) and in conjunction with ANSI Z21.24/CSA 6.10 “Connectors for Gas Appliances”.
IMPORTANT! The heating system will expand and contract during operation. Allowances for expansion
must be made between the connection to the heater and the gas supply. Excessive bending, kinks,
twists or vibration must be avoided. A flexible gas connection of approved type is required. Flexible
stainless steel gas connectors, or other approved connection device, installed in one plane, and without
sharp bends, kinks or twists is recommended.
The gas pipe and connection must be supported independently. Do not install gas supply line in a
manner that bears the weight of the heater. Connect the main gas supply line with an approved flexible
connector (Figures 3.18-3.19) or, if national or local codes require rigid piping, a swing joint. 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 heater
expansion must be used.
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. 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 system to electrically ground the heater.
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.
Form the approved flexible connector (supplied) into a smooth C-shape allowing 12 in. between the
flexible connector’s end nuts (see Figures 3.18-3.19).
Attach the ball valve (supplied) 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. NPT plugged tapping accessible for test gauge connection immediately
upstream of gas connection to the heater (provided on ball valve).
Attach the flexible connector to the adapter and burner control box inlet. Seal the joints.
NOTE: Excessive torque on the manifold may misalign the orifices. Always use two wrenches to
tighten mating pipe connections. Final assembly must be tested for gas leaks according to NFPA 54
and all local codes and/or Standards.
1
3
4
2
WARNING
!
Failure to install, operate or service this appliance in the approved manner may result in
property damage, injury or death. Only trained, qualified gas installation and service
personnel may install or service this equipment.
To connect the gas: