Carrier 50ZH024-060 instruction manual ÐWet Coil Pressure Drop, ÐFilter Pressure Drop in. wg

Table 5ÐWet Coil Pressure Drop

UNIT SIZE	AIRFLOW	PRESSURE DROP
50ZH	(CFM)	(IN. WG)
	600	0.02
024	700	0.05
	800	0.06
	900	0.07
	900	0.06
030
	1000	0.06
	1200	0.08
	1000	0.07
036	1200	0.09
	1400	0.11
	1600	0.12
	1000	0.04
042	1200	0.06
	1400	0.08
	1600	0.09
	1400	0.07
048	1600	0.08
	1800	0.09
	1700	0.07
060	1800	0.08
	2100	0.09
	2300	0.10

Table 6ÐFilter Pressure Drop (in. wg)

UNIT	FILTER											CFM
SIZE	SIZE
50ZH	(IN.)		500		600		700		800		900		1000		1100			1200			1300				1400
024-042	24 x 24		0.06		0.07		0.08		0.08		0.09		0.09		0.09			0.10			0.11					0.12
048, 060	24 x 30		-		-		-		-		-			-		-			-		0.08					0.09
UNIT	FILTER											CFM
SIZE	SIZE
50ZH	(IN.)		1500		1600			1700		1800		1900		2000		2100			2200				2300
024-042	24 x 24		0.14		0.15			-		-		-		-		-			-				-
048,060	24 x 30		0.10		0.11			0.12		0.13		0.14		0.15		0.16			0.17			0.18
Table 7ÐAccessory Electric Heat Pressure Drop
							(in. wg)
HEATER KW												CFM
		600		800		1000			1200		1400			1600			1800			2000				2200
5-20
		0.06		0.08		0.10			0.13		0.15			0.18			0.20			0.23				0.25

Step 6ÐElectrical Controls and Wiring

Inspect and check the electrical controls and wiring annually. Be sure to turn off the electrical power to the unit and install lockout tag.

Remove the top panel to locate all the electrical controls and wiring. Check all electrical connections for tightness. Tighten all screw connections. If any smoky or burned connections are noticed, disassemble the connection, clean all the parts, restrip the wire end and reassemble the connection properly and securely.

Check to ensure no wires are touching refrigerant tubing or sharp sheet metal edges. Move and secure wires to isolate from tubing and sheet metal edges.

After inspecting the electrical controls and wiring, replace all the panels. Start the unit, and observe at least one complete cooling cycle to ensure proper operation. If discrepancies are observed in

18

3.125 in.

C00021

Fig. 21ÐOutdoor-Fan Adjustment (024±048 Size)

0.708in.

C02017

Fig. 22ÐOutdoor-Fan Adjustment (060 Size)

operating cycle, or if a suspected malfunction has occurred, check each electrical component with the proper electrical instrumenta- tion. Refer to the unit wiring label when making these checkouts.

NOTE: Refer to the Sequence of Operation section, as an aid in determining proper control operation.

Step 7ÐRefrigerant Circuit

Inspect all refrigerant tubing connections and the unit base for oil accumulations annually. Detecting oil generally indicates a refrig- erant leak.

If oil is detected or if low cooling performance is suspected, leak-test all refrigerant tubing using an electronic leak-detector, or liquid-soap solution. If a refrigerant leak is detected, refer to Check for Refrigerant Leaks section. (See Table of Contents for page number.)

If no refrigerant leaks are found and low cooling performance is suspected, refer to Refrigerant Charge. (See Table of Contents for page number.)

Step 8ÐIndoor Airflow

The cooling airflow does not require checking unless improper performance is suspected. If a problem exists, be sure that all supply- and return-air grilles are open and free from obstructions, and that the air filter is clean. When necessary, refer to Indoor Airflow and Airflow Adjustments section to check the system airflow.

Step 9ÐMetering Devices

Refrigerant metering devices are fixed orifices and are located in the inlet header to the indoor and outdoor coils.

Check valves are also located in the liquid lines near the strainers. The check valves are the smaller of the two components.

Step 10ÐLubrication

COMPRESSORÐThe compressor is charged with the correct amount of oil at the factory.

FAN MOTOR BEARINGSÐFan motor bearings are perma- nently lubricated. No further lubrication of outdoor or indoor fan motors is required.

Step 11ÐLiquid Line Strainer

The liquid line strainer (to protect metering device) is made of wire mesh and is located in the liquid line on the inlet side of the metering device.