Unitary products group 3000 Operations Instructions

GENERALModel DAYA and DBYA units are cooling/heating air conditionersdesigned for outdoor installation. Only gas piping, electric powerand duct connec

2. Check for correct manifold gas pressures. See “CheckingGas Input”.3. Check the supply gas pressure. It must be within the limitsshown on rating nam

3. After maintenance of the pilot assembly, always measurethe resistance across the ignitor. If the resistance is greaterthan 10 ohms, discard the ign

NORMAL MAINTENANCEWARNING:Prior to any of the following maintenance proce-dures, shut off all power to the unit, to avoid per-sonal injury.Periodic ma

Checking Supply Air CFMTo check the supply air CFM after the initial balancing has beencompleted:1.Remove the two ¼ inch dot plugs in the duct panel.2

035-18267-001-A-020214 Unitary Products GroupTABLE 11 - SUPERHEAT CHARGING TABLE FOR MODEL D1YA024OUTDOORTEMPERATURE(F)SUPERHEAT AT COMPRESSOR SUCTION

035-18267-001-A-0202Unitary Products Group 15TABLE 14 - SUPERHEAT CHARGING TABLE FOR MODEL D1YA042OUTDOORTEMPERATURE(F)SUPERHEAT AT COMPRESSOR SUCTION

035-18267-001-A-020216 Unitary Products GroupTROUBLESHOOTINGNOTE: Before troubleshooting, familiarize yourself with the startup and checkout procedure

035-18267-001-A-0202Unitary Products Group 17FIG. 9 - TYPICAL WIRING DIAGRAM (208/230-1-60 POWER SUPPLY)FIG. 10 - TYPICAL WIRING DIAGRAM (208/230-3-60

035-18267-001-A-020218 Unitary Products GroupFIG. 11 - TYPICAL WIRING DIAGRAM (460-3-60 POWER SUPPLY)FIG. 12 - TYPICAL WIRING DIAGRAM (575-3-60 POWER

035-18267-001-A-0202Unitary Products Group 19(ALTERNATE)(ALTERNATE)TYPICAL WIRING DIAGRAM NOTES (See pages 16 and 17)TYPICAL WIRING DIAGRAM LEGEND (Se

035-18267-001-A-02022 Unitary Products GroupTABLE OF CONTENTSGeneral...1Inspe

20 Unitary Products Group035-18267-001-A-0202NOTES

Subject to change without notice. Printed in U.S.A.Copyright  by Unitary Products Group 1999. All rights reserved.035-18267-000 -A-0202Supersedes:

Not suitable for use with conventional venting systems.LIMITATIONSThese units must be installed in accordance with the followingnational and local saf

Refer to Figure 5 for information concerning rear and bottomsupply and return air duct openings.ROOF CURBOn applications when a roof curb is used, the

COMPRESSORSUnits are shipped with compressor mountings factory-adjustedfor shipping. CAUTION: Loosen compressor mounting boltshalf turn before operati

1. A drip leg and a ground joint union must be installed in thegas piping.2. When required by local codes, a manual shut-off valve mayhave to be insta

035-18267-001-A-0202Unitary Products Group 7FIG. 4 - CENTER OF GRAVITY2524CENTER OF GRAVITYFRONTOFUNITCORNER “C”CORNER “D”CORNER “A”CORNER “B”TABLE 7

035-18267-001-A-02028 Unitary Products GroupFIG. 5 - DIMENSIONS AND CLEARANCESCLEARANCES(Minimum)Front 36"Back 0"Left Side (Filter Access) 2

The unit is controlled by a conventional four wire heating/cool-ing thermostat common to this class of equipment.HEATINGWhen the thermostat calls for