Carrier 48MPD, MPE62L-10R, 50MP62L-10R START-UP Initial Check, Ð Basic Conguration Data

Table 25 Ð Basic Con®guration Data

SET POINT	SUBFUNCTION	DISPLAY	DEFAULT	RANGE
Unit Type		TYPE	1 = VAV	CV = 0, VAV = 1
CV Fan Mode		FANM	1 (Continuous)	Auto = 0, Cont = 1
Economizer Minimum		MDP	20 percent	0 to 100
Damper Position
Heating Occupied*		OHSP	68 (F)	55 to 80
Cooling Occupied		OCSP	78 (F)	55 to 80
Cooling Unoccupied		UCSP	90 (F)	75 to 95
Heating Unoccupied		UHSP	55 (F)	40 to 80
Static Pressure		SPSP	1.5 (in. wg)	0 to 5.0
Supply Air Temperature		SASP	55 (F)	45 to 70
Date and Time		TIME	dow.hh.mm mm.dd.yy	Ð
Override Schedules²		OVRD x HR	0 (hrs)	0, 1, 2, 3 or 4
Schedule I Periods		OCC HH.MM	Ð	Ð
LEGEND

CV Ð Constant Volume

VAV Ð Variable Air Volume

*Requires Occupied Heating function enabled. ²See text section for discussion and instructions.

Gas Pressure Check Ð Prior to performing the Quick Test, install gas pressure gages and jumper as follows:

1.Turn off manual gas stop valve.

2.Install a jumper between HR1-NO and HR2-NO.

3.Connect pressure gage to gas supply pressure tap. See Fig. 34.

4.Connect pressure gage to manifold pressure tap on each gas manifold.

5.Turn on manual gas stop valve.

During the heating portion of the Quick Test, ,

both the ®rst and second stage of gas heat will be tested. During the ®rst stage, all of the burner sections will operate at low ®re condition (approximately 75% capacity). During the second stage, all of the burner sections will operate at 100% capacity.

During the Quick Test of stage 2, after the unit has been operating for several minutes, verify that the incoming gas line pressure is 5.5 in. wg or greater. Also, verify that the manifold pressure at each burner section is 3.3 in. wg. If manifold pressure must be adjusted, refer to the Gas Valve Adjustment section on page 52.

After the unit has been in operation for 5 minutes, check the temperature rise across the unit heat exchangers. See the unit informative plate for correct rise range limits. Air quan- tities may need to be adjusted to bring the actual rise within allowable limits.

IMPORTANT: After the Quick Test has been perfor- mend for stage 2, remove the jumper betwen HR1-NO and HR2-NO.

Check Supply Fan Rotation Ð If unit is equipped with an optional VFD, check for correct fan rotation. Fan direction can be changed by disconnecting power and switch- ing 2 power leads downstream of the VFD output terminals T1, T2, and T3.

START-UP

Initial Check

IMPORTANT: Do not attempt to start unit, even mo- mentarily, until all items on the Start-Up Checklist and the following steps have been completed.

1.Verify unit has been installed per the Installation section of this literature.

2.Certify that all auxiliary components (sensors, controls, etc.) have been installed and wired to the control boxes per these instructions, the Controls and Troubleshooting literature and the unit wiring label diagrams.

3.Verify that pressure hoses (static, duct, etc.) are properly attached, routed, and free from pinches or crimps that may affect proper control operation.

4.Set any control con®gurations that are required (®eld- installed accessories, etc.). The unit is factory con®gured for all appropriate factory-installed options with the applicable controls programmed to the default values. See unit Controls and Troubleshooting literature for appli- cable con®guration values.

5.Enter unit set points (if applicable). The unit is shipped with the set point default values shown in the Con- trols and Troubleshooting literature. If a different set point is required, change per the example shown under Set Point Function section in Controls and Troubleshooting literature.

6.Con®gure schedule subfunctions (if applicable): occu- pied, unoccupied, and holiday periods. See Schedule Func- tion section in Controls and Troubleshooting literature for details on setting periods.

7.Verify that control time periods programmed meet cur- rent requirements.

8.Check all electrical connections to be sure they are tight.

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