Unitary products group DNH018 Installation Manual
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Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 15 SEQUENCE OF OPERATION The unit is controlled by a conventional four wire heating/ cooling thermostat common to this class of equipment. HEATING When the thermostat calls for HEAT, the thermostat terminal W is energized, energizing the combustion air blower. After airflow is established, the air proving switch closes, the hot surface ignitor is energized and the pilot valve opens igniting the pilot flame. The flame rod senses a flame and de-energizes the ignitor opening the main gas valve a
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 17 HOT SURFACE PILOT INSTRUCTIONS To check, adjust or remove the hot surface pilot assembly, CLOSE THE MAIN MANUAL SHUT-OFF VALVE AND SHUT OFF ALL POWER TO THE UNIT. The pilot flame should envelope 1/2 inch of the end of the flame sensor and not contain any yellow color, see Figure 7. To adjust the pilot flame: 1. Remove the pilot adjustment cover screw. 2. Adjust the pilot adjustment screw to achieve the proper pilot flame. 3. Replace the pilot adjustment cover screw after the pilot flame is set. To remove the hot surface pilot assembly: 1. Disconnect the wiring from the gas v
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 31 TYPICAL WIRING DIAGRAM NOTES (SEE FIGURES 16, 17, 18 AND 19) 1. All field wiring to be accomplished following city, local and/or national codes in effect at time of installation of this unit. 2. Motors are inherently protected. 3. See unit nameplate for maximum fuse size and minimum circuit ampacity. 4. Unit factory wired for low or medium speed indoor blower operation to change motor speed connect speed tap wires from indoor blower motor per Detail B (Figure 23) tape unused speed tap wires to prevent shorting and secure near M2 contactor. 5. Select indoor blower speed to remain within the te
Unitary products group DNH018, 66324-YIM-B-1004 8 Unitary Products Group COMPRESSORS Units are shipped with compressor mounting factory-adjusted for shipping. Loosen compressor mounting bolts a half turn before operating unit. TABLE 3: NATURAL GAS APPLICATION DATA AVAILABLE ON MODELS INPUT CAPACITY (MBH) 1 OUTPUT CAPACITY (MBH) GAS RATE 2 FT. 3 /HR. NUMBER OF BURNERS TEMP. RISE °F AT FULL INPUT 3 MIN. MAX. 1-1/2, 2, 2-1/2 3 TON 45 36 42 2 25 55 2 & 2-1/2 TON 70 56 65 3 30 60 3 TON 70 56 65 3 25 55 3-1/2 TON, 4 & 5 TON 80 64 74 3 25 55 3 TON 90 72 84 4 30 60 3-1/2 TON 108 87 100 4 45 75 4 & 5 T
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 11 4. All piping should be cleaned of dirt and scale by ham- mering on the outside of the pipe and blowing out the loose dirt and scale. Before initial start-up, be sure that all of the gas lines external to the unit have been purged of air. 5. The gas supply should be a separate line and installed in accordance with all safety codes as prescribed under Limitations. After the gas connections have been com- pleted, open the main shut-off valve admitting normal gas pressure to the mains. Check all joints for leaks with soap s
66324-YIM-B-1004 14 Unitary Products Group FIGURE 8 - UNIT DIMENSIONS - FRONT & BOTTOM 2 6 - 3 / 4 6 4 - 5 / 8 8 - 7 / 8 1 1 - 7 / 8 1 9 - 1 / 4 H I G H V O L T A G E C O N N . 1 - 3 / 3 2 " D I A . K N O C K O U T F R O N T C O N D E N S A T E D R A I N 3 / 4 " ' N P T I G A S S U P P L Y 1 - 5 / 8 " D I A . K N O C K O U
Unitary products group DNH018, 66324-YIM-B-1004 16 Unitary Products Group 3. Remove the control access panel. 4. Turn the gas valve switch to the OFF position. DO NOT FORCE. 5. Replace the control access panel. POST-START CHECK LIST (GAS) After the entire control circuit has been energized and the heating section is operating, make the following checks: 1. Check for gas leaks in the unit piping as well as the sup- ply piping. 2. Check for correct manifold gas pressures. See Checking Gas Input. 3. Check the supply gas pressure. It must be within the lim- its shown on rating na
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 3 GENERAL YORK Model D1NH units are cooling/heating air conditioners designed for outdoor installation. Only gas piping, electric power and duct connections are required at the point of installation. The gas-fired heaters have hot surface to pilot ignition. The tubular heat exchangers are aluminized steel. This appliance is not to be used for temporary heating of buildings or structures under construction. Installer should pay particular attention to the words; NOTE, CAUTION, and WARNING. NOTES are intended to clarify or make the installation easier. CAUTIONS are given to prevent equipment damage. WARNINGS are given to a
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 7 FIGURE 3 - FIELD WIRING DIAGRAM CONTROL WIRING FIGURE 4 - POWER WIRING FIELD DIAGRAM G R O U N D L U G R E F E R T O E L E C T R I C A L D A T A T A B L E S T O S I Z E T H E D I S C O N N E C T F I E L D - S U P P L I E D D I S C O N N E C T C O N T A C T O R F I E L D - S U P P L I E D D I S C O N N E C T C O N T A C T O R G R O U N D L U G R E F E R T O E L E C T R I C A L D A T A T A B L E S T O S I Z E T H E D I S C O N N E C T S I N G L E P H A S E P O W E R S U P P L Y T H R
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 23 TROUBLESHOOTING NOTE: Before troubleshooting, familiarize yourself with the START-UP and CHECKOUT procedures. FIGURE 15 - TROUBLESHOOTING Troubleshooting of components necessarily requires opening the electrical control box with the power connected to the unit. Use extreme care when working with the live circuits! Check the unit nameplate for the correct line voltage and set the volt meter to the correct range before making any connections with line terminals. If
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 5 RIGGING OR HANDLING Care must be exercised when moving the unit. Do not remove any packaging until the unit is near the place of installation. Rig unit with slings placed under the unit. Spreader bars of sufficient length should be used across the top of the unit. Units may also be moved or lifted with a fork-lift. Slotted openings in the skid are provided for this purpose. Forks must pass completely through the base. Refer to Table 2 for unit weights and to Figure 2 for approxi- mate center of gravity. CLEARANCES All units require certain clearances
Unitary products group DNH018, 66324-YIM-B-1004 22 Unitary Products Group TABLE 16: SUPERHEAT CHARGING TABLE FOR D1NH042 OUTDOOR TEMP. °F SUPERHEAT AT COMPRESSOR SUCTION (F), AIRFLOW = 800 CFM INDOOR WB TEMP. (°F) 55 57 59 61 63 65 67 69 71 73 75 65 25.6 25.8 26.0 26.2 26.5 26.7 26.9 27.4 27.9 28.4 28.9 70 23.3 23.7 24.0 24.4 24.8 25.1 25.5 26.0 26.6 27.1 27.7 75 21.1 21.6 22.1 22.6 23.1 23.6 24.1 24.7 25.3 25.9 26.5 80 18.8 19.4 20.1 20.7 21.3 22.0 22.6 23.3 23.9 24.6 25.2 85 16.5 17.3 18.1 18.9 19.6 20.4 21.2 21.9 22.6 23.3 24.0 90 14.3 15.1 15.9 16.6
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 9 COMBUSTION DISCHARGE GAS PIPING Proper sizing of gas piping depends on the cubic feet per hour of gas flow required, specific gravity of the gas and the length of run. National Fuel Gas Code Z223.1 or CAN/CGA B149.1 or .2 should be followed in all cases unless super- seded by local codes or gas company requirements. Refer to Tables 5 and 6. The heating value of the gas may differ with locality. The value should be checked with the local gas utility. NOTE: There may be a local gas utility requirement specify- ing a minimum diameter for gas
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 13 FIGURE 7 - UNIT DIMENSIONS - FRONT All dimensions are in inches. They are subject to change with- out notice. Certified dimensions will be provided upon request. TABLE 9: UNIT DIMENSIONS FRONT UNIT SIZE DIMENSION “A” “B” 018 - 036 33-1/2 18-1/4 042 - 060 41-1/2 23-1/8 TABLE 10: UNIT MINIMUM CLEARANCES 1 2 1. A 1” clearance must be provided between any combustible material and the supply 7 air ductwork. 2. The products of combustion must not be allowed to accumulate within a confined space and recirculate. CLEARANCES FRONT 36” BACK 0” LEFT SIDE (Filter-Access) 24” RIGHT SIDE 12” BELOW UNIT 3 3. Units may be install
66324-YIM-B-1004 18 Unitary Products Group NOTE: To find the BTU input, multiply the number of cubic feet of gas consumed per hour by the BTU content of the gas in your particular locality. (Contact your gas company for this information since it varies widely from city to city.) SECURE OWNER'S APPROVAL When the system is functioning properly, secure the owner&apos
Unitary products group DNH018, 66324-YIM-B-1004 6 Unitary Products Group ROOF CURB On applications when a roof curb is used, the unit must be positioned on the curb so the front of the unit is tight against the curb. FILTERS Single phase units are shipped without a filter or filter racks and is the responsibility of the installer to secure a filter in the return air ductwork or install a Filter/Frame Kit (1FF0110). A filter rack and a high velocity filters are standard on three phase units. Filters must always be used and must be kept clean. When filters become dirt laden, insufficient a
Unitary products group DNH018, Subject to change without notice. Printed in U.S.A. 66324-YIM-B-1004 Copyright © 2004 by Unitary Products Group. All rights reserved. Supersedes: 66324-YIM-A-1003/035-18266-002-A-1003 Unitary 5005 Norman Product York OK Group Drive 73069
Unitary products group DNH018, 66324-YIM-B-1004 4 Unitary Products Group INSTALLATION LIMITATIONS These units must be installed in accordance with the follow- ing national and local safety codes. 1. National Electrical Code ANSI/NFPS No. 70 or Canadian Electrical Code Part 1, C22.1 (latest editions). 2. National Fuel Gas Code Z223.1 or CAN/CGA B149.1 or.2 Installation Code. 3. Local gas utility requirements. 4. Local plumbing and waste water codes and other appli- cable local codes. Refer to Table 1 for unit application data and to Table 2 for gas heat application data. If components are to be added to a unit to meet local co
Unitary products group DNH018, CONTENTS GENERAL. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INSPECTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 RENEWAL PARTS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 APPROVALS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 SEQUENCE OF OPERATION . . . . . . . . . . . . . . . . . . . . . . 15 START-UP . . . . . . . . . . . . . . . . . . . . . . . . . .
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 19 BURNER At the beginning of each heating season, make a visual check of the main burner flame. If it is not possible to adjust for the proper flame, the burners may need cleaning. TO CLEAN BURNERS Remove them from the furnace as explained in Burner Instructions. Clean burners with hot water applied along top of the burner. COMBUSTION AIR DISCHARGE Visually inspect discharge outlet periodically to insure soot and dirt buildup is not excessive. If necessary, clean to main- tain adequate combustion air discharge. The manufacture recommends that the furnace system be inspected once a year by a qualified service person. CLEANIN
Unitary products group DNH018, 66324-YIM-B-1004 Unitary Products Group 21 TABLE 13: SUPERHEAT CHARGING TABLE FOR D1NH024 OUTDOOR TEMP. °F SUPERHEAT AT COMPRESSOR SUCTION (F), AIRFLOW = 800 CFM INDOOR WB TEMP. (°F) 55 57 59 61 63 65 67 69 71 73 75 65 29.2 29.5 29.7 30.0 30.2 30.5 30.7 31.5 32.2 33.0 33.8 70 25.1 25.8 26.4 27.0 27.7 28.3 29.0 29.8 30.7 31.6 32.5 75 21.0 22.0 23.1 24.1 25.1 26.2 27.2 28.2 29.2 30.2 31.2 80 16.9 18.3 19.7 21.2 22.6 24.0 25.5 26.5 27.6 28.7 29.8 85 12.8 14.6 16.4 18.2 20.1 21.9 23.7 24.9 26.1 27.3 28.5 90 5.7 8.0 10.4 12.7 15.1 17.4 19.8 21.8 23.8 25.7 27.7 9
66324-YIM-B-1004 10 Unitary Products Group . i FIGURE 5 - EXTERNAL SUPPLY CONNECTION EXTERNAL SHUT-OFF TABLE 5: NATURAL GAS PIPE SIZING CHART 1 1. Maximum capacity of pipe in cubic feet of gas per hour (based upon a pressure drop of 0.3 inch water column and 0.6 specific gravity gas). LENGTH IN FEET NOMINAL INCHES IRON PIPE SIZE 1/2” 3/4” 1” 1-
Unitary products group DNH018, 66324-YIM-B-1004 20 Unitary Products Group FIGURE 14 - D1NH COIL DELTA P VS. AIRFLOW D1NH Coil Delta P vs Airflow 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 400 600 800 1000 1200 1400 1600 1800 2000 2200 Airflow (CFM) ID Coil Delta P D1NH018 D1NH024 D1NH030-36 D1NH042 D1NH048-60 Linear (D1NH018) Linear (D1NH024) Linear (D1NH030-36) Linear (D1NH048-60) D1NH042-60D1NH030-36 D1NH024 D1NH018 TABLE 12: SUPERHEAT CHARGING TABLE FOR D1NH018 OUTDOOR TEMP. °F SUPERHEAT AT COMPRESSOR SUCTION (F), AIRFLOW = 600 CFM INDOOR WB TEMP. (°F) 55 57 59 61 63 65 67 69 71 73 75 65 30.7 31.2 31.8 32.3 32.9 33.4 34.0 34.2 34.4 34.7 34.9 70 22.9 24.4 25.8 27.3 28.8 30.2 31.7 32.1 32.6 33
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