Carrier PSD006-070, PSV, 50PSH instruction manual ECM Blower Motor Performance Data, Setting Size

DEHUMIDIFICATION MODE — The dehumidification mode setting provides field selection of humidity control. When oper- ating in the normal mode, the cooling airflow settings are deter- mined by the cooling tap setting in Table 11. When dehumidifi- cation is enabled, there is a reduction in airflow in cooling to in- crease the moisture removal of the heat pump. The Dehumidification mode can be enabled in two ways:

1.Constant Dehumidification mode: When the Dehumidifi- cation mode is selected via DIP switch, the ECM will operate with a multiplier applied to the cooling CFM settings (approximately 20 to 25% lower airflow). Any time the unit is running in the Cooling mode, it will oper- ate at the lower airflow to improve latent capacity. The “DEHUM” LED will be illuminated at all times. Heating airflow is not affected.

NOTE: Do not select Dehumidification mode if cooling setting is tap 1.

2.Automatic (humidistat-controlled) Dehumidification mode: When the Dehumidification mode is selected via DIP switch AND a humidistat is connected to termi- nal DH, the cooling airflow will only be reduced when the humidistat senses that additional dehumidification is required. The DH terminal is reverse logic. Therefore, a humidistat (not dehumidistat) is required. The “DEHUM” LED will be illuminated only when the humi- distat is calling for Dehumidification mode. Heating airflow is not affected.

NOTE: Do not select Dehumidification mode if cooling setting is tap 1.

Table 11 — ECM Blower Motor Performance Data

50PS	MAX	FAN	TAP	COOLING MODE			DEHUMIDIFICATION MODE			HEATING MODE
UNIT	ESP	MOTOR			(cfm)			(cfm)			(cfm)
			SETTING
SIZE	(in. wg)	(hp)		Stage 1	Stage 2	Fan	Stage 1	Stage 2	Fan	Stage 1	Stage 2	Fan
			4	750	620	380	590	480	380	750	620	380
018	0.50	1/2	3	700	570	350	550	450	350	700	570	350
			2	620	510	310	480	400	310	620	510	310
			1	530	430	270	—	—	—	530	430	270
			4	950	780	470	740	610	470	1060	870	470
024	0.50	1/2	3	850	700	420	660	540	420	950	780	420
			2	730	600	360	570	470	360	820	670	360
			1	610	500	300	—	—	—	690	570	300
			4	1130	920	560	880	720	560	1230	1000	560
030	0.50	1/2	3	1000	820	500	780	640	500	1100	900	500
			2	880	720	440	680	560	440	980	800	440
			1	750	620	380	—	—	—	850	700	380
			4	1400	1150	700	1090	900	700	1400	1150	700
036	0.50	1/2	3	1250	1020	630	980	800	630	1250	1020	630
			2	1080	890	540	840	690	540	1080	890	540
			1	900	740	450	—	—	—	900	740	450
			4	1580	1290	790	1230	1010	790	1580	1290	790
042	0.50	1/2	3	1400	1150	700	1100	900	700	1400	1150	700
			2	1230	1000	610	960	790	610	1230	1000	610
			1	1050	860	530	—	—	—	1050	860	530
			4	1730	1420	870	1350	1110	870	1850	1520	870
048	0.75	1	3	1550	1270	780	1210	990	780	1650	1350	780
			2	1330	1090	670	1040	850	670	1430	1180	670
			1	1120	920	560	—	—	—	1200	980	560
			4	2050	1680	1030	1600	1310	1030	2280	1870	1030
060	0.75	1	3	1825	1500	910	1420	1170	910	2050	1680	910
			2	1580	1300	790	1230	1010	790	1750	1430	790
			1	1320	1080	660	—	—	—	1470	1210	660
			4	2230	1780	1100	1710	1400	1100	2230	1780	1100
070	0.75	1	3	1950	1600	980	1520	1250	980	2100	1680	980
			2	1700	1400	850	1330	1090	850	1840	1470	850
			1	1450	1200	730	—	—	—	1520	1220	730

LEGEND

ESP — External Static Pressure

NOTES:

1.Factory setting is Tap Setting 2.

2.Airflow is controlled within 5% up to the Max ESP shown with wet coil.

3.Do not select Dehumidification mode if Tap Setting is on Setting 1.

4.All units are ARI/ISO (Air Conditioning & Refrigeration Institute/ International Organization for Standardization) 13256-1 rated Tap Setting 3.

5.Airflow in cfm with wet coil and clean air filter.

6.Units have an ECM (electronically commuted motor) fan motor as a standard feature. The small additional pressure drop of the reheat coil causes the ECM motor to slightly increase rpm to overcome the added pressure drop and maintain selected cfm up to maximum ESP (external static pressure).

7.Unit sizes 006-012 are not available with ECM motors.

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