Page 8TABLE 1UNIT CLEARANCES TO COMBUSTIBLE MATERIALSUnit Top Side** Bottom Back Fluein mm in mm in mm in mm in mm030/105 1 25 1 25 1 25 18 457 6* 152125/400 6 152 18 457 1 25 18 457 6 152*6” is for single wall. Double wall B-vent clearance will bein accordance with the manufacturer’s listing.**Access panel or control box side of unit should have 24”(610mm) clearance.The Commonwealth of Massachusetts stipulates the fol-lowing additional requirements:1 - Gas furnaces shall be installed by a licensedplumber or gas fitter only.2 - The gas cock must be “T handle” type.The appliance shall not be installed downstream fromevaporator coils or cooling units.Install the unit in the desired location as governed byclearances, vent connection, air direction, gas supply,electrical supply and service accessibility.Unit is shipped ready for installation.UHCM -125/400 UNITSFour mounting nuts are furnished. Refer to dimensionillustration. Mounting nuts will accommodate 3/8” x 16threaded rods.1 - Push each louver to the left to depress spring andrelease locking tab on the other end (locking tabkeeps the louver in place for shipping).2 - Rotate louvers to direct airflow as desired.3- Cut threaded rods to desired length and slide a 3/8”nut onto the rod.4 - Slide a flat washer onto the threaded rod AFTER thenut (7/16” inside diameter X 1” outside diameter X1/16” thick washer).5 - Screw the rods (two or four) into the mounting nutson the unit.6 - Tighten nuts to secure unit to rods.TABLE 2MAXIMUM MOUNTING HEIGHTS - 125/400UHRS 30/105Unit may be installed as shown in figure 1 or rotated180°.1 - Push each louver to the right to depress spring andrelease locking tab on the other end (locking tabkeeps the louver in place for shipping).2 - If installing unit in a rotated position - release lockingtabs in the same manner as previous step. Rotateeach louver 180° and reinstall. Remove and retainscrews securing access panel. Rotate access panel180° and resecure using retained screws.3 - Rotate louvers to direct airflow as desired.4 - Choose location for mounting brackets.5 - Align mounting brackets with pilot holes on the top orbottom (when rotating) edge of the unit. Secure withscrews provided in bag assembly.6 - To support unit, secure mounting bracket to ceilingjoist or truss. Unit may also be supported usingsupport rods as shown in figure 1.INSTALL UNIT HEATER(030 / 105 SHOWN)MOUNTINGBRACKETS(2) SUPPORTRODSACCESS PANELFIGURE 1Adequate facilities for supplying air for combustion andventilation must be provided in accordance with the cur-rent edition of ANSI Z223.1, section 5.3 and CSA-B149installation compliance codes, or applicable provisions oflocal building codes.All gas-fired appliances require air to be used for com-bustion. In many buildings today, there is a negative in-door air pressure caused by exhaust fans, etc. If sufficientquantities of combustion air are not available, the heaterAdditional RequirementsUnit Heater InstallationCombustion and Ventilation AirUnit Feet (Meters)UHCM-125/150 16 (4.9)UHCM-175/200 20 (6.1)UHCM- 250/400 30 (9.1)