Carrier 50PTH, PTV specifications Pre-Start-Up, Wshp Open Fan Only / Low Fan and Med Fan Airflow

Table 14A — WSHP Open — Fan Only / Low Fan and Med Fan Airflow

50PT UNIT	MAX	FAN MOTOR	TAP SETTING	SW 3	SW 4	FAN ONLY	COOLING AND	COOLING AND
SIZE	ESP	HP		(SW 1)	(SW 2)		HEATING LOW FAN	HEATING MED FAN
			4	OFF	OFF	475	920	1050
26	0.5	0.5	3	OFF	ON	425	825	950
			2	ON	OFF	370	710	820
			1	ON	ON	300	600	690
			4	OFF	OFF	700	1120	1400
38	0.5	0.5	3	OFF	ON	630	1000	1250
			2	ON	OFF	540	860	1080
			1	ON	ON	450	730	900
			4	OFF	OFF	870	1560	1850
49	0.75	1	3	OFF	ON	780	1400	1650
			2	ON	OFF	670	1200	1430
			1	ON	ON	560	1010	1200
			4	OFF	OFF	1020	1860	2280
64	0.75	1	3	OFF	ON	920	1650	2040
			2	ON	OFF	780	1430	1750
			1	ON	ON	660	1200	1470
			4	OFF	OFF	1050	1600	2230
72	0.75	1	3	OFF	ON	980	1600	2100
			2	ON	OFF	910	1400	1850
			1	ON	ON	850	1240	1620

NOTE: Factory default setting shown bold.

IMPORTANT: The tap setting for high fan MUST equal or exceed the tap setting for fan only/low/med fan

Table 14B — WSHP Open — High Fan Airflow

50PT UNIT SIZE	MAX ESP	FAN MOTOR HP TAP SETTING		SW 5	SW 6	COOLING AND HEATING HIGH FAN
		4		OFF	OFF	1060
26		3		OFF	ON	950
	0.5	0.5
				ON	OFF	820
			2
		1		ON	ON	690

			4	OFF	OFF	1400
38		3		OFF	ON	1350
	0.5	0.5
				ON	OFF	1350
			2
		1		ON	ON	1350

			4	OFF	OFF	1850
49		3		OFF	ON	1660
	0.75	1
				ON	OFF	1430
			2
		1		ON	ON	1350

			4	OFF	OFF	2280
64		3		OFF	ON	2050
	0.75	1
				ON	OFF	1750
			2
		1		ON	ON	1470

			4	OFF	OFF	2230
72		3		OFF	ON	2100
	0.75	1
				ON	OFF	1870
			2
		1		ON	ON	1670

NOTE: Factory default setting shown bold.

IMPORTANT: The tap setting for high fan MUST equal or exceed the tap setting for fan only/low/med fan

PRE-START-UP

System Checkout — When the installation is complete, follow the system checkout procedure outlined below before starting up the system. Be sure:

1.Voltage is within the utilization range specifications of the unit compressor and fan motor and voltage is balanced for 3-phase units.

2.Fuses, breakers and wire are correct size.

3.Low voltage wiring is complete.

4.Piping and system flushing is complete.

5.Air is purged from closed loop system.

6.System is balanced as required. Monitor if necessary.

7.Isolation valves are open.

8.Water control valves or loop pumps are wired.

9.Condensate line is open and correctly pitched.

10.Transformer switched to lower voltage tap if necessary.

11.Blower rotates freely — shipping support is removed.

12.Blower speed is on correct setting.

13.Air filter is clean and in position.

14.Service/access panels are in place.

15.Return-air temperature is between 40 to 80 F heating and 50 to 110 F cooling.

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