Installation Instructions

Installation
a
) The regulator shall be installed in an accessible location with an approved shut-off valve on the inlet side
and a union on the outlet side so that it may be inspected, maintained and serviced if repair or replacement
i
s required.
b) The regulator is suitable for multi-poise mounting. When using a vent-limiting device however, the regulator
m
ust be mounted in a horizontal upright position. All regulators provided by
P
ro-Flex
®
i
nclude a vent
limiting device.
c) The vent limiter is a fail-safe device that
permits free air movement above the diaphragm
during normal operation. In the unlikely event of
a diaphragm rupture, the vent limiting device will
limit gas escapement to 1.0 CFH natural gas at 2
P
SI and 0.65 CFH LP at 2 PSI. Both values are
below the ANSI standard of 2.5 CFH.
Note: The vent-limiting device does not allow gas to escape
to the environment during normal mode operation.
d) Do not leak test the vent limiter with liquid leak test solution. This action will contaminate the internal ball
check mechanism or plug the breathing hole resulting in erratic regulator performance
e) Using a vent limiter, the maximum inlet pressure is (2 PSI Propane) and (5 PSI Natural Gas).
f) When using a vent line, the line must be at least the same size as the regulator vent connection, and
cannot exceed a length of 30 ft. The vent shall be designed to prevent entry of water, insects or other
foreign materials that could cause blockage of the line.. Do not vent to appliance flue, pilot light or building
exhaust system.
g) Maxitrol regulators have a lower temperature limit of -40 degrees F. The lower temperature limit and rust
proof construction design enables the regulator to be used for outdoor installations. To minimize the
potential for moisture condensation and freezing problems in or around the vent port,
the vent limiting
device must be removed for outdoor installations.
Outdoor Mounting Options:
The regulator may be mounted upside down with the open
vent port facing down. Consideration must be taken to
ensure there is adequate clearance for snow buildup.
The regulator may be mounted horizontally, with a
v
ent tube installed in the v
enting por
t. The end of the
tube m
ust be facing downward, and should be
designed to prevent water and foreign material from
causing a blockage.
35
FIGURE A
FIGURE B
FIGURE C