Danfoss CCM Data sheet

Data Sheet

Electric regulating valve

Type CCM

Expansion and gas bypass valve for CO2

The CCM is an electrically operated valve designed speci€cally for operation in CO2

systems. The valve is capable of functioning both as an expansion valve, and as a gas bypass valve with back-pressure regulation in subcritical applications.

The pressure rating allows for operation in environments where system standby capability is required without the need for auxiliary cooling systems during servicing or power outages.

Features:

• Up to 90 bar (1305 psi) working pressure to accomodate CO2 system pressures during

standstill conditions.

• Precise positioning for optimal control of intermediate pressures in transcritical CO2

systems or liquid injection in heat exchangers.

• MOPD up to 50 bar (725 psi).

• Combined stainless steel butt weld/solder connections for installation in copper piped systems (K65 alloy or standard) as well as steel piped systems.

• Standard M12 connector for simple and ‚exible connection to the motor driver.

• For manual operation and service of the CCM an AST-g service driver is available. For further information please contact Danfoss (Commercial Refrigeration and Air Conditioning Controls).

• UL recognized.

AI213386426013en-000601

Electric regulating valve, type CCM

Applications

The CCM can be used in a variety of applications within CO2 refrigeration systems. Typically it is used as a gas bypass valve in a transcritical CO2 booster system or as an expansion valve.

Figure 1: Application 1

EKC	AKS 2050	<![if ! IE]> <![endif]>Danfoss R64-2046.11
326A
		AKS
		2050
	ICMTS	CCM
	To cases	From cases

A gas bypass valve is typically used to regulate the intermediate pressure in a transcritical CO2 refrigeration system. By venting ‚ashgas generated after the transcritical expansion, the pressure can be kept at a safe level for all components situated in the liquid lines of a transcritical CO2 system. For use in the gas bypass application the EKC326A controller is recommended.

Figure 2: Application 2

	EKC 316A
AKS 11	AKS 33	CCM	EVR
	GBC	GBC
			<![if ! IE]> <![endif]>Danfoss R64-2045.11

A liquid expansion valve is typically used for injection in plate heat exchangers of CO2/CO2 cascades, or as an expansion valve for CO2 evaporators. For the liquid injection applications CCM is used with EKC 316A controller.

© Danfoss | Climate Solutions | 2021.03

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Electric regulating valve, type CCM

Product speci€cation

Technical data

Table 1: Technical data

Parameter	CCM
Compatibility	R744
MOPD	50 bar (725 psi)
Max. working pressure (PS/MWP)	90 bar (1305 psi)
Refrigerant temperature range(1)	–40°C to 60°C (–40°F to 140°F)
Ambient temperature	–40°C to 60°C (–40°F to 140°F)
Material of construction	Stainless steel

(1) Measured at inlet of the valve

Electrical data

Table 2: Electrical data

	Parameter	CCM
	Motor enclosure	IP 67
	Stepper motor type	Bi-polar - permanent magnet
	Step mode	2 phase full step
	Phase resistance	52Ω ±10%
	Phase inductance	85 mH
	Holding current	Depends on application
		Full current allowed (100% duty cycle)
		7.5° (motor),
	Step angle	0.9° (lead screw),
		Gearing ration 8.5:1. (38/13)2:1
	Nominal voltage	(Constant voltage drive) 12 V dc -4% +15%, 150 steps/sec.
	Phase current	(Using chopper drive) 100 mA RMS -4% +15%,
	Max. total power	Voltage / current drive: 5.5 / 1.3 W (UL: NEC class 2)
	Step rate	150 steps/sec. (constant voltage drive)
		0-300 steps/sec. 300 recommended (chopper current drive)
	Total steps	CCM 10, 20, 30	2625 [+160 / -0] steps
		CCM 40	3530 [+160 / -0] steps
	Total stroke	13 mm / 16 mm (0.5 in. / 0.6 in.)
	Full travel time	CCM 10, 20, 30	17 / 8.5 sec. (voltage / current)
		CCM 40	23 / 11.5 sec. (voltage / current)
	Lifting height	CCM 10, 20, 30	13 mm (0.5 in.)
		CCM 40	16 mm (0.6 in.)
	Reference position	Overdriving against the full close position
	Electrical connection	4 wire 0.5 mm2 (0.02 in2), 0.3 m (1 ft) long cable

© Danfoss | Climate Solutions | 2021.03

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