Energy-tech-laboratories DHG240 User Manual

CONTENTSGENERAL...3SAFETYCONSIDERATIONS...3AGENCYAPPROVALS ...4INSPECTION...

035-17233-000-C-070210 Unitary ProductsL.P. UNITS, TANKS AND PIPINGAll gas heat units are shipped from the factory equipped fornatural gas use only. T

035-17233-000-C-0702Unitary Products 11Check all connections for leaks when piping is completed,using a soap solution. NEVER USE A FLAME.VENT AND COMB

035-17233-000-C-070212 Unitary ProductsFIGURE 9 : ENTHALPY SETPOINT ADJUSTMENT

035-17233-000-C-0702Unitary Products 13TABLE 6: PHYSICAL DATAMODELSDHG180 240EVAPORATORBLOWERCentrifugal Blower (Dia. x Wd. in.)15 x 15 18 x 15Fan Mot

035-17233-000-C-070214 Unitary ProductsFIGURE 10 : UNIT DIMENSIONS DHG180 & 240 (FRONT VIEW)RETURN AIRSUPPLYAIRBOTTOM SUPPLYAND RETURNAIR OPENINGS

035-17233-000-C-0702Unitary Products 15NOTE: A 1” clearance must be provided between any com-bustible material and the supply air ductwork for a dista

035-17233-000-C-070216 Unitary ProductsTABLE 11: DHG 15 TON SUPPLY AIR BLOWER PERFORMANCEDHG180 - BOTTOM DUCT CONNECTIONS1, 2BLOWERSPEED,(RPM)MOTORPUL

035-17233-000-C-0702Unitary Products 17TABLE 12: DHG 20 TON SUPPLY AIR BLOWER PERFORMANCEDHG240 - BOTTOM DUCT CONNECTIONS1, 2BLOWERSPEED,(RPM)MOTORPUL

035-17233-000-C-070218 Unitary ProductsTABLE 13: STATIC RESISTANCES1DESCRIPTIONRESISTANCE, IWGCFM15 TON 20 TON4500 5765 7200 6000 7000 9400WET COIL0.1

035-17233-000-C-0702Unitary Products 19OPERATIONCOOLING SYSTEMThe cooling section is a complete factory package utilizing anair-cooled condenser. The

035-17233-000-C-07022 Unitary ProductsTABLE OF CONTENTSGENERAL ...3SAFETYCONSIDERATIONS ...3REF

035-17233-000-C-070220 Unitary Products3. A Low Pressure Switch/Loss Of Charge to protectagainst loss of refrigerant charge. (Opens at 7 psig + 3andre

035-17233-000-C-0702Unitary Products 213. Redundant Gas Valve - There are two separate gasvalves in the furnace. Each valve contains a main and aredun

035-17233-000-C-070222 Unitary Products5. Set room thermostat to desired temperature.(If thermo-stat set temperature is above room temperature, pilotb

035-17233-000-C-0702Unitary Products 23Reverse the above procedure to replace the assemblies.Make sure that burners are level and seat at the rear of

035-17233-000-C-070224 Unitary ProductsADJUSTMENT OF TEMPERATURE RISEThe temperature rise (or temperature difference between thereturn air and the hea

035-17233-000-C-0702Unitary Products 25MAINTENANCENORMAL MAINTENANCEPeriodic maintenance normally consists of changing or clean-ing filters and (under

035-17233-000-C-070226 Unitary Products1. Remove the burner assembly as outlined in BURNERINSTRUCTIONS.2. Remove the roof over the gas heat section.3.

035-17233-000-C-0702Unitary Products 271. The indoor blower motor is a non-inherently protectedthree-phase motor. Protection is provided by an overloa

Subject to change without notice. Printed in U.S.A.Copyright © by Unitary Products 2002. All rights reserved. Supersedes: 035-17233-000 Rev B (0500) 0

035-17233-000-C-0702Unitary Products 3D 1 HG 180 E 180 25 ECGENERALYORK Model DHG units are single package high efficiencygas-fired central heating fu

035-17233-000-C-07024 Unitary ProductsREFERENCEAdditional information on the design, installation, operationand service of this equipment is available

035-17233-000-C-0702Unitary Products 5LOCATIONUse the following guidelines to select a suitable location forthese units.1. Unit is designed for outdoo

035-17233-000-C-07026 Unitary Productscombustion and ventilation air in accordance with Section5.3, Air for Combustion and Ventilation of the National

035-17233-000-C-0702Unitary Products 7CONDENSATE DRAINPlumbing must conform to local codes. Use a sealing com-pound on male pipe threads. Install a co

035-17233-000-C-07028 Unitary ProductsCOMBUSTION DISCHARGEThe products of combustion are discharged horizontallythrough two screened (hooded) openings

035-17233-000-C-0702Unitary Products 9FIGURE 5 : TYPICAL FIELD WIRINGTABLE 4: GAS HEAT APPLICATION DATA1Input Capacity (Mbh) Output Capacity (Mbh)Avai