Honeywell AC-250NXS, Installation And User Manual, Page: 21 / 48

21
Install the AC-250NXS Gas Meter
This section describes how to install AC-250NXS Gas Meter. To install a gas
meter, perform below steps:
1.
Mark existing meter speed hand, to check for any flow inside the customer's
premise.
2.
Verify all gas appliance valves are turned off and pilot lights closed.
3.
Close Stopcock and remove existing meter.
4.
Make sure that NXS gas meter is installed as close to level as possible for
accurate operation.
5.
Avoid installing the meter in locations where the meter body is in contact
with soil or concrete walls. Alkali in concrete as well as other corrosive
elements in soil can cause premature corrosion of the meter body.
6.
Inlet and outlet pipe connections should be parallel. The height difference
between the housing connections should be no more than ¼
” .
7.
Hand tightens the inlet swivel cap. Open the manual inlet valve slightly to
pressure the system to purge the air inside the meter through the outlet.
Please note that the house line may also need to be purged.
8.
Hand tighten the outlet swivel cap. Using a pipe wrench, alternate between
both swivel caps and tighten approximately 3 flats (using approximately 20
ft/lb. torque).
DO NOT OVERTIGHTEN ; damage to the rubber gasket may
occur.
9.
Open manual inlet valve on the riser to meter to pressurize system.