Radiant BH15UT, Инструкция по установке, эксплуатации и обслуживанию

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SECTION 12: G
AS
P
IPING
53
SECTION 12: GAS PIPING
It is important that the gas s u pply pipe and electrical
connections do not s u pport any of the heater’s w eight.
Installation pipes sho u ld be fitted in accordance w ith
National Standards. Pipe w ork from the meter to the
heater(s) m u st be of adeq u ate size. Pipes of smaller size
than the heater inlet gas connection sho u ld not be u sed.
Install the gas hose as sho w n on Page 54, Figure 34 . The
gas hose accommodates expansion of the heating
system and allo
w s for easy installation and ser v ice of the
b u rner. Before connecting the b u rners to the s u pply
system, v erify that all high press u re testing of the gas
piping has been completed.
There is an expansion of the t u be w ith each firing cycle.
This w ill ca u se the b u rner to mo v e w ith respect to the gas
hose. This can ca u se a gas leak res u lting in an u nsafe
condition if the gas connection is not made in strict
accordance
w ith Figure 34 .
Meter and ser v ice m u st be large eno u gh to handle all the
b u rners being installed pl u s any other connected load.
The gas hose w hich feeds the system m u st be large
eno u gh to s u pply the req u ired gas w ith a maxim u m
press u re drop of 13 mm w c. When gas piping is not
incl u ded in the layo u t dra w ing, the local gas s u pplier w ill
u s u ally help in planning the gas piping.
IMPORTANT - the complete installation m u st be tested
for gas so u ndness and be p u rged in accordance w ith
local and national codes.
• Check the pipe and tubin g ends for leaks before
placin g heatin g e q uipment into
service. When checkin g for g as leaks, use a soap
and water solution; never use an open flame.
WARNING
Fire Hazard
Tighten gas line fittings to connect gas supply
according to Figure 34.
Flex gas line can crack when twisted.
Gas line moves during normal operation.
Use only 1000 mm long connector of 1/2" or
3/4" nominal ID.
Failure to follow these instructions can result
in death, injury or property damage.
WARNING
Explosion Hazard
Leak test all components of gas piping
before operation.
Gas can leak if piping is not installed
properly.
Do not high pressure test gas piping with
heater connected.
Failure to follow these instructions can result
in death, injury or property damage.