COMBAT
®
CTU UNIT HEATERS INSTALLATION OPERATION AND SER VICE MANUAL
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SECTION 10: GAS PIPE WORK
It is important that the gas supp
ly pipe and the
electrical connections do not support any of the
heater’s weight.
A gas meter is connected to the servi
ce pipe by the
gas supply company. An existing meter should be
checked, preferably by the gas supplier, to ensure
that the meter is adequate for the rate of gas supply
required.
Installation pipes mus
t be fitted in accordance with
local and national regulations. Pipe work from the
meter to the heater(s) must be of adequate size.
10.1 Connections
Connect the heater to the gas suppl
y ensuring that
the final connections are as follows:
•Gas suppl
y pipe work is run in medium or heavy
gauge tubing in compliance with local and
national regulations.
• The gas supp
ly pipe is adequately sized to carry
the total volume of gas for the complete
installation.
• An isolating valve and uni
on connection should
be used and fitted into the supply adjacent to the
heater.
•For sus
pended heaters, use an approved metal
flexible connection between the isolating valve
and the heater. To reduce pressure loss, use
one pipe size larger than the heater gas
connection.
IMPORTANT - The complete installation mus
t be
purged and tested for gas soundness in accordance
with local and national regulations.
• Check the pipe and tubing en
ds for leaks
before placing heating equipment into ser-
vice. When checking fo
r gas leaks, use a
soap and water solution; never use an open
flame
WARNING
Explosion Hazard
Leak test all components of gas pipe work
before operation.
Gas can leak if pipe work is not installed
properly.
Do not high pressure test gas pipe work with
heater connected.
Failure to follow these instructions can result
in death, injury or property damage.
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