Instruction/ maintenance manual of the product DHG240 Energy Tech Laboratories
Go to page of 28
CONTENTS G E N E R A L .......... ......... .......... .... 3 S A F E T YC O N S I D E R A T I O N S ........... ....... 3 A G E N C YA P P R O V A L S ..... .......... ....... 4 I N S P E C T I O N . .......... ......... .......... . 4 I N S T A L L A T I O N .
035-17233- 000-C-070 2 2 Unitary P roducts T A BLE OF CONTENTS G E N E R A L ........ ........ ...... ........ ........3 S A F E T YC O N S I D E R A T I O N S ....... ........ ...... ..3 R E F E R E N C E ....... ................................. 4 R E N E W A L P A R T S .
035-1723 3-000-C-0 702 Unitary Pro ducts 3 D 1 HG 180 E 180 25 EC GENERAL YORK M odel DHG un its are single p acka ge high ef ficiency gas-fire d central heat ing furnaces with co oling unit desi gned for out door i nstall ation on a rooft op or a sla b.
035-17233- 000-C-070 2 4 Unitary P roducts REFERENCE Addit ional informat ion on th e design, i nstall ation, o peration and servic e of this equipmen t is available in the fol lowing ref- erence f orms: • 44-320-10 - Barom etric Relie f Damper Ac cessory • 530.
035-1723 3-000-C-0 702 Unitary Pro ducts 5 LOCA TION Use the fol lowing gu idelines to s elect a suit able l ocatio n for these u nit s. 1. U nit is design ed for outd oor instal lation on ly . 2. C ondense r coils must h ave an unlimit ed supply of air .
035-17233- 000-C-070 2 6 Unitary P roducts combus tion and ve ntilation ai r in accorda nce with S ection 5.3, Air fo r Combust ion and V entilati on of the Nati onal Fuel Gas Code, ANSI Z 223.1 (in U.S.A.) or Sectio ns 7.2, 7.3 or 7.4 of Gas Installation Codes CAN/CGA-B149 .
035-1723 3-000-C-0 702 Unitary Pro ducts 7 CONDENSA TE DRAIN Plumbin g must c onform to loc al codes. Use a sealing com - pound on male pipe thre ads. Inst all a condensa te drain line from the 1" NP T female c onnectio n on the unit to an open drai n.
035-17233- 000-C-070 2 8 Unitary P roducts COMBUSTION DISCHARGE The produ cts of combusti on are disc harged ho rizonta lly through tw o screened ( hooded ) openings on th e upper ga s heat acces s panel .
035-1723 3-000-C-0 702 Unitary Pro ducts 9 FIGURE 5 : TYPICAL FIELD WIRING T A BLE 4: GAS HE A T APPLICA TION DA T A 1 Input Capacity (Mbh) Output Capacity (Mbh) Av ai la b le o n Models Gas Rate 2 (Ft.
035-17233- 000-C-070 2 10 Unitary P roducts L.P . UNITS, T ANKS AND PIPING All gas hea t units are s hipped from the facto ry equipped f or natural ga s use only . The unit may be convert ed in the f ield for use with L.P ./prop ane gas with access ory kit model num- ber 1NP0 437.
035-1723 3-000-C-0 702 Unitary Pro ducts 11 Check a ll conne ctions for leaks when piping is completed, using a soap solution . NEVER USE A FLAME. VENT AND COMBUSTION AIR H OODS T w o vent hood s and a combu stion ai r hood (wi th scree ns) are shippe d attac hed to the blower hous ing in the blower com - partm ent.
035-17233- 000-C-070 2 12 Unitary P roducts FIGURE 9 : ENTHALPY SETPOINT ADJUSTME NT.
035-1723 3-000-C-0 702 Unitary Pro ducts 13 T A BLE 6: PHYSICAL DATA MODELS DHG 180 240 EV APORA TOR BLOWER Centrifu gal Blower (Dia. x Wd. in.) 15 x 15 18 x 15 Fan M otor H P 57 . 5 EV APORA TOR COIL Rows Deep 44 Fins Per Inch 13.5 13 .5 Face A rea (S q.
035-17233- 000-C-070 2 14 Unitary P roducts FIGURE 10 : UNIT DIM ENSIONS DHG180 & 240 (FRONT VIEW) RETURN AIR SUPPLY AIR BOTTOM SUPPLY AND RETURN AIR OPENINGS (See Note) (B) POWER WIRING ENTRY (A).
035-1723 3-000-C-0 702 Unitary Pro ducts 15 NOTE: A 1” c learance must be prov ided be tween a ny com- bustibl e materi al and the supp ly air ductwork fo r a dist ance of 3 feet from the unit. NOTE: The prod uct s of combus tion mus t not be a llowed t o accum ulate wi thin a co nfined sp ace a nd reci rculat e.
035-17233- 000-C-070 2 16 Unitary P roducts T ABLE 1 1: DH G 15 TON SUPPL Y AIR BLOWER PERFORMANCE DHG180 - BOTTOM DUCT CONNECTIONS 1, 2 BLOWER SPEED, (RPM) MOTOR PULLEY (TURNS OPEN) 3 CFM 4500 5250 6000 6750 7200 ESP 4 BHP KW ESP 3 BHP KW ESP 3 BHP KW ESP 3 BHP KW ESP 3 BHP KW 208 VOL T AND ST ANDAR D DRIVE 850 6.
035-1723 3-000-C-0 702 Unitary Pro ducts 17 T A BLE 12: DHG 20 TON SUPPL Y AIR BLOWER P ERFORMANCE DHG240 - BOTTOM DUCT CONNECTIONS 1, 2 BLOWER SPEED , (RPM) MOTOR PULLEY (TURNS OPEN) 3 CFM 6000 7000 8000 9 000 9400 ESP 4 BHP KW ES P 4 BHP KW ESP 4 BHP K W ES P 4 BHP KW ESP 4 BHP KW 208 VOL T AND ST ANDARD DR IVE 870 6.
035-17233- 000-C-070 2 18 Unitary P roducts T ABLE 13: ST A TIC RESIST ANC ES 1 DESCRIPTION RESIST ANCE, I WG CFM 15 TO N 20 TON 4500 576 5 7200 6000 7000 9400 WET COIL 0.1 0.1 0 .1 0.1 0. 1 0.1 ECONOMIZE R OPTION 0.1 0.1 0 .1 0.1 0. 1 0.1 HORIZONT AL DUCT CONN.
035-1723 3-000-C-0 702 Unitary Pro ducts 19 OPERA TION COOLING SYSTEM The cool ing sectio n is a comp lete factory package util izing a n air-cool ed condens er . The system is fact ory-charge d with Refrigeran t-22. The compr essors ar e hermetica lly sealed , internal ly sprung and base-m ounted with rub ber-insul ated hold-dow n bolts.
035-17233- 000-C-070 2 20 Unitary P roducts 3. A Low P ressu re Swit ch/Los s Of Cha rge to p rotect agains t loss of r efrigerant charge. (Open s at 7 p sig + 3 a n dr e s e t sa t2 2p s i g+5 ) If either on e of the ab ove safety co ntrols ope ns, that indi vid- ual refrigera nt system will be loc ked out.
035-1723 3-000-C-0 702 Unitary Pro ducts 21 3. Redundan t Gas V alve - There are two separa te gas valves in the fu rnace. Eac h valve contai ns a mai n and a redundan t valve.
035-17233- 000-C-070 2 22 Unitary P roducts 5. Set room therm osta t to desire d tempera ture.(If therm o- stat se t temperature is abo ve room temperat ure, pilot burner ig nition w ill occur an d, aft er an in terval to prov e pilot fl ame, mai n burners wi ll ignite ).
035-1723 3-000-C-0 702 Unitary Pro ducts 23 Reve rse the abov e proce dure to re place th e assemb lies. Make sure that bu rners are le vel and s eat at the rear of the heat excha nger . BURNER AIR SHUTTER ADJ USTMENT Adjust burn er shutters so no ye llow flame is ob served in the heat ex changer t ubes.
035-17233- 000-C-070 2 24 Unitary P roducts ADJUSTMENT OF TEM PERA TURE RISE The temp erature rise (or temperatu re diffe rence betwe en the return air a nd the heated air fro m the furnace) must lie within the ra nge shown o n the ETL rating plat e and th e data i n T able 2.
035-1723 3-000-C-0 702 Unitary Pro ducts 25 MAINTENANCE NORMAL MAINTENANCE Peri odic maint enanc e nor mall y cons ists of ch angin g or cl ean- ing fi lters and ( under some c ondit ions) clea ning the m ain burn ers FIL TERS Inspec t once a month. Replace disp osable or cl ean perma- nent type as nec essary .
035-17233- 000-C-070 2 26 Unitary P roducts 1. Remo ve the burner asse mbly as outlined in B URNER INSTRUCTIONS. 2. Remove the roof ov er the gas heat sectio n. 3. At the top p late from t he top d raft blo wer hous ing and th e top draft blo wer wheel.
035-1723 3-000-C-0 702 Unitary Pro ducts 27 1. The indoor b lower m otor is a non- inheren tly protec ted three- phase moto r . Prote ction is provid ed by an overlo ad relay fo r overcurre nt and fuses for short c ircuit. If t he motor fa ils to run, check the lin e voltage ci rcuit and co n- trol volt age circuit per the fol lowing proc edure: a.
Subject to cha nge withou t notice. Printed i n U.S.A. Copyright © by Unita ry Produ cts 2002. All r ights re served. Superse des: 035- 17233-00 0 Rev B (050 0) 035-17233-0 00-C-070 2 Unit ary 5005 Norma n Product s Y ork OK Group Drive 73069 d.
An important point after buying a device Energy Tech Laboratories DHG240 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Energy Tech Laboratories DHG240 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Energy Tech Laboratories DHG240 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Energy Tech Laboratories DHG240 you will learn all the available features of the product, as well as information on its operation. The information that you get Energy Tech Laboratories DHG240 will certainly help you make a decision on the purchase.
If you already are a holder of Energy Tech Laboratories DHG240, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Energy Tech Laboratories DHG240.
However, one of the most important roles played by the user manual is to help in solving problems with Energy Tech Laboratories DHG240. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Energy Tech Laboratories DHG240 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
