3.0
Installation
- GTD Series Installation, Operation, Maintenance and Parts Manual
Gas Connection
This heater must be installed and service by trained gas installation and service personnel only.
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The installation must conform with local building codes and regulations.
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 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
(Figure 3.30-3.31) or, if national or local codes require rigid piping, a swing joint. See the safety messages at
the beginning of this section.
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 for condensation which 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 50 Mbar requires a high
pressure regulator and ball valve.
Form the stainless steel flexible connector into a smooth C-shape allowing 305mm between the
flexible connector’s end nuts (see Figure 3.30).
Attach the ball valve to the gas supply pipe. Apply pipe compound to adapter threads to seal the
joint. Use only a pipe compound resistant to LP (I3P-G31).
NOTE:
Provide a 3.2mm BSP plugged tapping accessible for test gauge connection immediately
upstream of gas connection to the heater (provided on ball valve). An isolation valve shall be fitted
immediately adjacent to the appliance which, when closed, allows the complete burner assembly to be
disconnected for maintenance or repair.
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:
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2
3
