Assessments - 2, GPA: 4 ( )

Fabricante : Roberts Gorden Arquivo Tamanho: 2.09 mb Arquivo Nome : Língua de Ensino:

The ducts must have removable access panels upstream and downstream of the heater. These panels must be of appropriate size and placement so that smoke or reflected light could be observed to indicate the presence of leaks in the heat exchanger. Covers for these openings should be sealed to prevent leakage. Any transition into the inlet of the heater should be smooth, with a taper of no more than 15°. If elbows are required, they should be of either broad radius or fitted with properly designed air turns. Consult a professional to ensure air turns are properly designed. The heater must be installed on the positive pressure side of the circulating air blower. Air flow through the heater must be as shown on Page 7, Figure 2 and may not be reversed. The air flow must be adjusted such that it is within the acceptable 5.1.1 Minimum Inlet Duct Length range shown on Page 7, Section 5.1.2. The minimum inlet duct lengths shown on Page 7, Section 5.1.1 must be observed. Pressure drop through the heat exchanger at various air flows is shown on Page 7, Section 5.1.2. Figure 2: Air Flow Direction Model Duct Length Duct Size (W X H) UHD[X][S][R] 150-175 52" (132 cm) 28" x 24" (71 cm x 60 cm) UHD[X][S][R] 200-250 60" (162 cm) 28" x 32 1/4" (71 cm x 103 cm) UHD[X][S][R] 300-400 75" (190 cm) 28" x 40 1/2" (71 cm x 82 cm) 5.1.2 Temperature Rise and Pressure Drop Ranges UHD[X][S][R] 150 UHD[X][S][R] 175 UHD[X][S][R] 200 UHD[X][S][R] 225 Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) 1,360 83 0.02 1,400 95 0.03 2,050 73 0.025 2,100 80 0.035 1,950 58 0.035 2,180 62 0.06 2,600 58 0.035 2,800 61 0.052 2,800 41 0.057 3,244 42 0.10 3,600 42 0.056 4,600 37 0.110 3,700 31 0.083 4,370 31 0.15 5,500 28 0.100 6,230 27 0.167 4,700 24 0.12 5,160 27 0.19 6,570 23.5 0.129 7,400 23 0.214 5,800 20 0.16 6,850 20 0.29 7,750 20 0.163 8,300 20 0.253 UHD[X][S][R] 250 UHD[X][S][R] 300 UHD[X][S][R] 350 UHD[X][S][R] 400 Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) Airflow (CFM) Temperature Rise (°F) Pressure Drop (in wc) 2,350 80 0.05 2,700 23 0.02 3,120 86 0.03 3,420 86 0.04 3,000 63 0.07 4,735 50 0.06 4,880 56 0.07 5,200 57 0.08 4,400 43 0.13 6,813 35 0.12 6,612 41 0.123 6,700 45 0.13 5,900 32 0.19 8,000 30 0.17 9,140 30 0.23 8,850 34 0.21 7,625 25 0.28 9,300 26 0.22 10,500 26 0.30 11,600 26 0.36 8,850 22 0.35 10,200 86 0.27 13,600 22 0.48 14,200 22 0.53 UHD STANDARD DUCT FURNACE INSTALLATION OPERATION AND SERVICE MANUAL 5.1.3 Air Flow And Temperature Rise Ranges Model Rate Air Flow Temperature Rise (Btu/h) Minimum (CFM) Maximum (CFM) Minimum (°F) Maximum (°F) UHD[X][S][R] 150 150,000 1,360 5,800 20 83 UHD[X][S][R] 175 175,000 1,400 6,850 20 95 UHD[X][S][R] 200 200,000 2,050 7,750 20 73 UHD[X][S][R] 225 225,000 2,100 8,300 20 80 UHD[X][S][R] 250 250,000 2,350 8,850 22 80 UHD[X][S][R] 300 300,000 2,700 10,200 23 86 UHD[X][S][R] 350 350,000 3,120 13,600 22 86 UHD[X][S][R] 400 385,000 3,420 14,200 22 86 5.2 Suspension WARNING Crush Hazard Use 3/8" threaded rod minimum. Failure to follow these instructions can result in death, injury or property damage. Four suspension points (3/8" nuts) are located on the top of the heater. Drop rods must be 3/8" diameter mild steel. Figure 3: Suspension Methods When handling or supporting the heater from below, ensure that the weight is taken at the support points. For typical suspension, See Page 8, Figure 3. The gas or electrical supply lines must not be used to support the heater. Do not locate the gas or electrical supply lines directly over the path of the flue products from the heater. The heater must be installed in a location that is readily accesible for servicing. The heater must be installed in accordance with clearances to combustibles as indicated on the wall tag and in this manual. Nut Washer RivNut Ensure all suspensionhardware is torqued to a minimum of 20 ft lbs. Support Points 3/8" Threaded Rod Cone Point Set Pin WindowClamp Unistrut Unistrut 3/8" Threaded Rod Washer Nut Channel Nut NOTE: Duct supports not shown. Duct supports and duct are not provided by manufacturer. SECTION 6: VENTING SECTION 6: VENTING WARNING Carbon Monoxide Hazard Heaters may be installed vented or unvented. Vented heaters must be vented outdoors. Unvented heaters must be installed in buildings with ventilation rates as per section 6.4. Failure to follow these instructions can result in death or injury. 6.1 Changing Vent and Air Intake Orientation The heater is sold with rear horizontal vent and air intake connections. (Only separated combustion models have air intake connection.) 6.2 Venting This heater must be vented in accordance with the rules contained in this manual and with the following national codes and any s...

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