I.C.E. MTI 11-300 - Manual (Page 9)

9
GAS PIPING
All gas piping should be in accordance with National Fuel Gas Code ANSI Z223.1, and CAN
1-B149 with the regulation of local authorities having jurisdiction. An emergency manual shut
down valve shall be provided upstream of the piping to unit and should be labelled for quick
identification. Colour coding of gas piping is also recommended.
In addition:
a) Carefully check the unit rating plate for fuel type and supply pressure.
b) If required, locate the high-pressure regulator at least five feet from the unit.
c) Gas lines must not be located in such a way as to hinder access to the unit.
d) A minimum 1/8" NPT plugged tapping, accessible for test gauge connection, must be
installed immediately upstream of the gas supply connection to the appliance.
GAS VENT
High gas pressure regulator (if required), low pressure regulator, pilot pressure regulator, gas
pressure switch (if supplied), and normally open vent valve (if supplied) must be vented outside
of building for an indoor unit (check with authorities having jurisdiction).
DUCT FURNACES
a) A duct furnace shall be installed with an inlet duct, which will provide air distribution
equivalent to a straight run of duct having the same cross-section area as the inlet
connection and not less than two equivalent diameters in length.
b) The ducts connected to the duct furnace must have removable access panels on both
upstream and downstream sides of the duct. The opening must be accessible, and shall be
of such size, that smoke or reflected light may be observed inside the casing to indicate the
presence of leaks in the heating element. The cover for the opening shall be attached in
such a manner as to prevent leaks.
c) The installation of the duct furnace must be adjusted to obtain an air throughout within the
range specified on the appliance rating plate.
d) If a duct furnace is connected to a return air duct or any other inlet air restoration; the duct
furnace shall be installed on the positive pressure side of the air-circulating blower.
COOLING
When installed downstream from a refrigeration system, condensation will form and provisions
shall be made to dispose of condensate.