Emerson 3000/ITR manual Outdoor fan/condenser configuration

Component Operation and Maintenance

Checking Refrigerant Charge (Lee–Temp/Flood Back Head Pressure Control)

The system refrigerant level must be checked periodically. To do so:

1.Adjust temperature setpoint in the unit so that the compressor will run continuously.

2.The refrigerant level is visible through two sight glasses on the receiver and will vary with ambient temperature.

a.40°F (4.4°C) and lower — Midway on the bottom sight glass.

b.40 to 60°F (4.4 to 15.6°C) — Bottom sight glass should be clear with liquid.

c.60°F (15.6°C) and above — Midway on the top sight glass.

3.Return temperature setpoint to desired number.

Figure 23 Outdoor fan/condenser configuration

FAN SPEED CONDENSER

Electric service
supplied by others
* B
Hot gas line
Secure each leg to condenser
frame at all points shown using
hardware provided.
Liquid line
LEE-TEMP CONDENSER
Lee-Temp heater pad	* B
connection box
	Hot gas line
	Electric
	service
	supplied by
Liquid line	others

*B - Inverted traps are to be field-supplied and installed (typical). When installing traps, pro- vide clearance for swing end of access door. Traps are to extend above base of coil by a minimum of 7-1/2" (190 mm).

7.4.7Water/Glycol Cooled Condensers Coaxial Condenser

Each water- or glycol-cooled module has a coaxial condenser that consists of a steel outside tube and a copper inside tube.

Coaxial condensers do not normally require maintenance or replacement if the water supply is clean. If your system operates at high head pressure with reduced capacity, and all other causes have been eliminated, the coaxial condenser may be obstructed and needs to be replaced.

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