Carrier 30RAP010-060 specifications CEPL130351

	CEBD430351-0396-01C
PWR	J1	J2			01
					-
J4		J3	LEN		CEPL130351
		STATUS		TEST 1
J5
				J7
		J6		TEST 2
		RED LED - STATUS	GREEN LED -	ADDRESS
			LEN (LOCAL EQUIPMENT NETWORK)	DIP SWITCH

Fig. 12 — Energy Management Module

LEAD/LAG DETERMINATION — This is a configurable choice and is factory set to be automatic for all units unless the unit is equipped with a digital scroll compressor or minimum load, then circuit A is lead (Configuration→OPT2→ LLCS). The value can be changed to Circuit A or Circuit B leading as desired. Set at automatic, the control will sum the current num- ber of logged circuit starts and one-quarter of the current oper- ating hours for each circuit. The circuit with the lowest sum is started first. Changes to which circuit is the lead circuit and which is the lag are also made when total machine capacity is at 100% or when there is a change in the direction of capacity (increase or decrease) and each circuit’s capacity is equal.

CAPACITY CONTROL OVERRIDES — The following over- rides will modify the normal operation of the routine.

Deadband Multiplier — The user configurable Deadband Multiplier (Configuration→SLCT→Z.GN) has a default val- ue of 1.0. The range is from 1.0 to 4.0. When set to other than 1.0, this factor is applied to the capacity Load/Unload Factor. The larger this value is set, the longer the control will delay be- tween adding or removing stages of capacity. Figure 13 shows how compressor starts can be reduced over time if the leaving water temperature is allowed to drift a larger amount above and below the set point. This value should be set in the range of 3.0 to 4.0 for systems with small loop volumes.

First Stage Override — If the current capacity stage is zero, the control will modify the routine with a 1.2 factor on adding the first stage to reduce cycling. This factor is also applied

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when the control is attempting to remove the last stage of capacity.

Slow Change Override — The control prevents the capacity stages from being changed when the leaving fluid temperature is close to the set point (within an adjustable deadband) and moving towards the set point.

Ramp Loading — Ramp loading (Configura- tion→SLCT→CRMP) limits the rate of change of leaving fluid temperature. If the unit is in a Cooling mode and config- ured for Ramp Loading, the control makes 2 comparisons be- fore deciding to change stages of capacity. The control calcu- lates a temperature difference between the control point and leaving fluid temperature. If the difference is greater than 4° F (2.2° C) and the rate of change (°F or °C per minute) is more than the configured Cooling Ramp Loading value (CRMP), the control does not allow any changes to the current stage of capacity.

Low Entering Fluid Temperature Unloading — When the entering fluid temperature is below the control point, the control will attempt to remove 25% of the current stages being used. If exactly 25% cannot be removed, the control removes an amount greater than 25% but no more than necessary. The lowest stage will not be removed.

Minimum Load Control — If equipped, the minimum load control valve is energized only when one compressor is run- ning on circuit A. If the close control feature is enabled the minimum load control valve may be used as needed to obtain leaving fluid temperature close to set point.