MUA-SVX006B-EN
25
IImmppoorrttaanntt:: Unit installation for use with propane (bottled) gas must be made by a qualified LP
gas dealer or installer. He will insure proper joint compounds are used for making
pipe connections; that air is purged from lines; that a thorough test is made for leaks
before operating the unit; and that it is properly connected to propane gas supply
system.
Modulating Gas Control (Optional)*
EElleeccttrroonniicc:: On units equipped with electronic modulating control, follow control manufacturer’s
installation instructions for sensing of outlet air temperature.
NNoottee:: *Also refer to the Separated Combustion Indoor Duct Furnace Installation Manual supplied
with your unit.
Electrical Connections
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• All electrical connections must conform to: the latest edition of ANSI/NFPA No. 70, National
Electrical Code, and applicable local codes. In Canada, to the Canadian Electrical Code, Part I
CSA Standard C22.1.
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• Single furnace make-up air packaged units are wired at the factory and are ready to be
connected. Multiple furnace make-up air units are shipped in two parts, the air handler
section and the furnace section. After mounting the two sections and installing the flexible
duct connector, connect the free end of the flexible conduits from the air handler section to
the junction box on the duct furnace. Each wire has a distinctive marking. Connect each wire
to its respectively marked terminal in the duct furnace junction box. See Figure 16, p. 26.
Actual unit wiring will differ according to the options chosen. Each unit is shipped with its
own wiring diagram; refer to this wiring diagram for all electrical connections to the unit.
• All line voltage and thermostat connections are made in the Electrical Cabinet (See Figure
17, p. 27). Line voltage connections are made at the High Voltage Terminal Block. Thermostat
connections are made at the Main Connection Board (See Figure 18, p. 27).
• Locate the thermostat in accordance with the instructions supplied with the thermostat. All
field wiring must have a minimum temperature rating of 185°F (85°C). Control wiring shall be
a minimum of 18 gauge wire size. Control wiring must be sized for length of run.
• Locate line voltage disconnect box per local codes. If mounting the disconnect box to the unit,
never mount it to a unit access panel. Possible locations include the front of the blower or
filter section (See Figure 19, p. 27). Electrical conduit must be routed so as not to interfere
with removal of any access panel.
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