-Push the heater upwards so that it leans toward the bracket, and the upper hooks slide into place. 3. Heating 3.1 Function of the service elements Turn on switch A when the heating period starts. Lamp B lights when the heater is emitting heat. The thermostat dial C is for setting the desired room temperature, which will then remain constant. Depending on where the heater is installed, it may happen that the room temperature and the temperature shown on the thermostat dial do not agree. In this

Owner Keep this manual in a safe place in order to provide your serviceman with necessary information. Roberts-Gordon, LLC 1250 William Street P.O. Box 44 Buffalo, New York 14240-0044 Telephone: 716.852.4400 Fax: 716.852.0854 Toll Free: 800.828.7450 © Copyright 2005 Roberts-Gordon Quality in Any Language™ CGTH-30 CGTH-40 CGTH-50 P/N 180100NA Rev. G 11/05 Light Industrial/Commercial Applications Installation, Operation & Service Manual Roberts-Gordon, LLC 1250 William Street P.O. Box 44 Buffalo,

If a shorter distance is required, see Page 28, Step 5 for cutting instructions. FIGURE 25: Horizontal Installation Side View Cox Geelen Venting *.- 3! !79:--- 3& $! 4 5! !79:---; 4" 4% " 6 0;)( # $"67, 6"60 CGTH INSTALLATION, OPERATION AND SERVICE MANUAL 4. Install the vent adapter (P/N 90506012) and secure FIGURE 27: Horizontal Venting Configurations with #8 x 3/8” sheet metal screws as shown in Figure 26. 5. If the concentric vent has to be cut (see note on Page 28), follow instructions

The CGTH-Series heater employs a balanced flue/air venting duct system and must conform to the following length requirements: Maximum Length:10' (3048 mm) Minimum Length:2' - 6" (760 mm) Maximum Elbows:Two (2) with natural gas units, one (1) with propane gas units 3.4.2 Venting Codes %-& %& , * % ) % ! " # The location, size, installation and termination of vents, as well as the required safe distances from combustibles when penetrating combustible walls, must co

• All dimensions are subject to change without notice. • Due to height of unit, additional support is recommended on top of the unit. • Dimension "F" is flue diameter. Flue located on left side of unit for 1,000 MBH heat exchanger and smaller; flue located on right side of unit for 1,250 MBH heat exchanger and larger. • Dimensions "D" and "F" may vary depending on heat exchanger size (ex. 45 = 450 MBH heat exchanger). 2 AT-Series Heating Unit with Filtration AMMBLCGDHFFKJCONTROLPANELINSPECTIONAN

Combat® AT-Series Indirect-Fired Air Turnover Units Dimension and Selection Guide 1.800.828.7450 Quality in Any Language™ AT-Series Heating Unit AMMBNLCGDHFFSPLIT FORSHIPMENTINSPECTIONAND RELIEFPORTEKLIFTINGANGLESJLCONTROLPANELDADARARARARADADAEND VIEWFRONT VIEWDISCHARGE PLENUMEXTENSIONS(OPTIONAL) HEAT EXCHANGER SECTIONPROPELLERFAN / INLETSECTIONINLETPLENUM LEGEND DA = Discharge Air RA = Return Air DIMENSIONS AT-136 AT-148 AT-154 AT-236 AT-242 AT-248 AT-254 AT-260 AT-272 A 60 72 85 90 100 116 145

4 AT-Series Heating and Cooling Unit with Filtration ABCGDHSPLITFORSHIPMENTINSPECTIONANDRELIEF PORTKLIFTINGANGLESLIFTINGANGLESJPELMNMLCONTROLPANELFFQEND VIEWFRONT VIEWDADARARARARADADADISCHARGE PLENUMEXTENSIONS(OPTIONAL) ADDITIONAL PROPELLER FAN SECTION REQUIRED FOR 254, 260, 272 MODELSPROPELLER FAN / INLET SECTIONEXTERIOR FILTER RACKS / COILS AND COIL EXTENSIONHEAT EXCHANGER SECTION LEGEND DA = Discharge Air RA = Return Air DIMENSIONS AT-136 AT-148 AT-154 AT-236 AT-242 AT-248 AT-254 AT-260 AT-27

Rise Range (°F) Base Unit Weight (lbs.) 14,000 3 (1 motor) 240 450 16 to 30 4,080 22,000 5 (1 motor) 240 750 10 to 32 4,140 30,000 10 (1 motor) 520 1,000 16 to 31 4,210 30,000 10 (1 motor) 560 1,250 17 to 39 4,420 AT-260 CFM Motor (HP) Output (MBH) Minimum Output (MBH) Maximum Temp. Rise Range (°F) Base Unit Weight (lbs.) 54,000 5 (2 motors) 600 3,000 10 to 51 11,070 61,000 7.5 (2 motors) 720 4,000 11 to 61 11,335 74,000 10 (2 motors) 720 4,000 9 to 50 11,385 AT-236 CFM Motor (HP) Output (MBH) M

Rise Range (°F) Base Unit Weight (lbs.) 10,000 3 (1 motor) 240 450 22 to 42 3,255 16,000 3 (1 motor) 240 750 14 to 43 3,300 AT-254 CFM Motor (HP) Output (MBH) Minimum Output (MBH) Maximum Temp. Rise Range (°F) Base Unit Weight (lbs.) 40,000 5 (2 motors) 560 1,750 13 to 41 7,670 60,000 7.5 (2 motors) 600 2,250 9 to 35 8,060 65,000 7.5 (2 motors) 600 2,500 9 to 36 8,310 AT-154 CFM Motor (HP) Output (MBH) Minimum Output (MBH) Maximum Temp. Rise Range (°F) Base Unit Weight (lbs.) 14,000 3 (1 motor)

Rise Range (°F) Base Unit Weight (lbs.) 40,000 5 (2 motors) 560 1,750 13 to 41 7,870 60,000 10 (2 motors) 600 2,250 9 to 35 8,310 65,000 15 (2 motors) 600 2,500 9 to 36 8,560 AT-154 CFM Motor (HP) Output (MBH) Minimum Output (MBH) Maximum Temp. Rise Range (°F) Base Unit Weight (lbs.) 14,000 5 (1 motor) 240 450 16 to 30 4,080 22,000 7.5 (1 motor) 240 750 10 to 32 4,140 30,000 10 (1 motor) 520 1,000 16 to 31 4,210 30,000 10 (1 motor) 560 1,250 17 to 39 4,420 AT-260 CFM Motor (HP) Output (MBH) Mini