Heat Recovery Mode - Optional; Figure 16: Heat Recovery Implementation - Emerson Copeland EazyCool OM 501 Series Application Manuallines

Upper setpoint [bar] (1)
Differential Setpoint (3)
Lowest Setpoint [bar]
Factory Setting [bar]
Leakage Test pressure [bar]
Connection port
• PS1/PS2 pressure switches come with individually adjustable differential
• Use a flat screw driver or a ¼" refrigeration (square) wrench to adjust setpoints
• Adjust upper setpoint (1) using the range spindle (1).
• Adjust lower setpoint (2) by turning the differential spindle (3).

2.8.5 Heat recovery mode - optional

The OM(T) & OL(T)E units are prepared for heat recovery. There are some preassembled tubes
with shut of valves to connect an external heat exchanger for desuperheating.
The unit controller is also prepared for heat recovery. A digital input signal (DI3 / R07) is required
to inform the controller about demand. As soon as there is a demand for heating, the controller
will swap the logic for fan speed from floating HP to a fix condensing temperature set point. The
heat recovery condensing fan set point can be adjusted by parameter E67.
The control of water cycle must be done by third party controller. This controller must provide the
digital input signal to the XCM-25D controller.

Figure 16: Heat recovery implementation

16
1. Upper Setpoint range spindle
2. Lower Setpoint
3. Differential spindle = variable
-0.5 ... 7
0.5 ... 5
-0.9
3.5 / 4.5
24
Solder 6mm
C6.1.9/0617/E