c. Mounting The air conditioner should be bolted or lag-screwed to a flat, level surface. The base plate contains
four mounting holes. equipped with 7/16-14 clinch nuts if bolting from below is required. These nuts may be driven out if
bolting or lag-screwing from above is necessary. (See figure 4-1.)
If utilizing the four clinch nuts for mounting, a new bolt, with no lubrication, should be used. The mounting
bolts shall not be torqued more than 15 foot-pounds to prevent deforming the clinch nut plate or dislodging
the clinch nut from the plate.
d. The air conditioner must have an unobstructed flow of air in order to operate efciently. Make use of terrain
features, trees, and other buildings impossible to provide a shaded location without obstruction of air. This minimizes the
cooling load on the refrigeration system.
e . The unit should be located as near as possible to a source of 208-volt, 3-phase. 50/60hertz, ac electric power.
The main power input receptacle is located on the rear surface of the air conditioner at the 4:30 o'clock position below the
condenser fan guard. If the normal location is inconvenient. the receptacle maybe moved to either side or to the space
between the evaporator intake grille and the air filter by removing four screws, lock washers and nuts from the flange of
the receptacle, and transferring it to the desired location. Also, transfer the cover plate from the new location of the
receptacle to the original location. Secure each with four screws, lock washers and nuts.
f. A ground connection should be made between the casing and the earth, using bare wire (No. 10 AWG). The
ground end of the the may be connected to a cold water pipe or to a copper or brass rod driven at least 14 inches into the
g. Before operating the air conditioner make sure that the fabric cover is rolled up and secured, and that the
evaporator air intake and discharge louvers are fully open.
h. If delivery and/or return air is to be ducted to a remote location. remove the evaporator air intake and
discharge grilles from the unit. Install ductwork as required, and install grilles on the outer ends of the ducts. Be sure to
incorporate provisions for access to air falter and mist eliminator in the ductwork.
i. If the control panel is to be remotely located, remove it from the air conditioner as directed in the following
(1) Disconnect power source from unit.
(2) Remove the front access panel and the evaporator intake grille from the air conditioner to provide access
(3) Disconnect the wiring harness connector from the receptacle on the left end of the control panel
(4) Remove the four screws securing the control panel assembly to the junction box. Retain the screws.
(5) Remove the air falter.
(6) Loosen the loop clamp which retains the temperature control thermostat sensor bulb on the right. hand
side of the evaporator fan. Lead the bulb and capillary tube carefully through the grommet while removing the control
panel from the air conditioner. Coil the capillary tube carefully, and mount the sensor bulb in the outside cavity of the
control panel housing, using the loop clamp from its original location.
(7) Install a block-off assembly on top of the junction box, in the same position as that from which the
control panel assembly was removed. Secure with the four screws retained in step (4). (See figure 4-3).
(8) Mount the control panel assembly in the desired remote location, and mount a new receptacle,
MS3106R-28-11S, in the appropriate position in either the block-off plate or the partition between the evaporator intake
louver and the air filter.