Coolant Pump - Revision history

ZeeKay: /* CWA200 */

2026-02-16T15:50:53Z

CWA200

@@ Line 82: / Line 82: @@
 === CWA200 ===
 Good-sized pump for most applications main coolant
 *     Operation voltage: 8-16 volts
 *     Weight: approx. 2.15 kg
@@ Line 95: / Line 96: @@
 *     Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0
 *     BMW: 11517586925 / 11517586924 / 11517563183 / 11517546994 / 11517545201 / 11517521584
 ==== PWM Input ====

ZeeKay: /* PWM modes */

2026-02-16T15:38:36Z

PWM modes

← Older revision		Revision as of 15:38, 16 February 2026
Line 139:		Line 139:
	[[File:Pierburg CWA200 duty cycle vs speed.png\|none\|thumb\|500x500px\|Fig. 12: Duty cycle versus speedGraph showing pump speed (%) vs. PWM duty cycle (%), with distinct modes: flat at low DC (Mode 1/2), linear from ~14% to 85% (Mode 3), and flat at high DC (Mode 4).]]		[[File:Pierburg CWA200 duty cycle vs speed.png\|none\|thumb\|500x500px\|Fig. 12: Duty cycle versus speedGraph showing pump speed (%) vs. PWM duty cycle (%), with distinct modes: flat at low DC (Mode 1/2), linear from ~14% to 85% (Mode 3), and flat at high DC (Mode 4).]]

	===== ~~'''~~PWM modes~~'''~~ =====		===== PWM modes =====
	{\| class="wikitable"		{\| class="wikitable"
	!Mode		!Mode

ZeeKay: /* CWA200 */

2026-02-16T15:37:57Z

CWA200

← Older revision		Revision as of 15:37, 16 February 2026
Line 81:		Line 81:

	=== CWA200 ===		=== CWA200 ===
			Good-sized pump for most applications main coolant
	* Operation voltage: 8-16 volts		* Operation voltage: 8-16 volts
	* Weight: approx. 2.15 kg		* Weight: approx. 2.15 kg

ZeeKay: /* Part numbers: */

2026-02-16T15:36:47Z

Part numbers:

← Older revision		Revision as of 15:36, 16 February 2026
Line 91:		Line 91:
	* Protection: IP67		* Protection: IP67

	==== Part numbers: ====		==== Part numbers ====

	* Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0		* Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0

ZeeKay: /* CWA200 */

2026-02-16T15:36:33Z

CWA200

← Older revision		Revision as of 15:36, 16 February 2026
Line 81:		Line 81:

	=== CWA200 ===		=== CWA200 ===
	~~Operation voltage: 8-16 volts~~

	Weight: approx. 2.15 kg		* Operation voltage: 8-16 volts
			* Weight: approx. 2.15 kg
	Current consumption: 15A (16.5A max.) / (approx. 0.2mA in standby mode)		* Current consumption: 15A (16.5A max.) / (approx. 0.2mA in standby mode)
			* Nominal diff. pressure: 0.45 bar *
	Nominal diff. pressure: 0.45 bar *		* Flow rate: ca. 116 l/min @ 0.45bar / 166 l/min @ 0.30bar
			* Speed: approx. 4500 rpm
	Flow rate: ca. 116 l/min @ 0.45bar / 166 l/min @ 0.30bar		* Temperature range: -40°C – 128°C (water) / -40°C – 140°C (ambient)
			* Protection: IP67
	Speed: approx. 4500 rpm

	Temperature range: -40°C – 128°C (water) / -40°C – 140°C (ambient)

	Protection: IP67

	==== Part numbers: ====		==== Part numbers: ====
	~~Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0~~

	BMW: 11517586925 / 11517586924 / 11517563183 / 11517546994 / 11517545201 / 11517521584		* Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0
			* BMW: 11517586925 / 11517586924 / 11517563183 / 11517546994 / 11517545201 / 11517521584

	==== PWM Input ====		==== PWM Input ====

ZeeKay: /* Duty cycle */

2026-02-16T15:35:20Z

Duty cycle

← Older revision		Revision as of 15:35, 16 February 2026
Line 115:		Line 115:
	The percentage duty cycle (DC) is represented by the ratio of T<sub>high</sub> to T<sub>periode</sub>:		The percentage duty cycle (DC) is represented by the ratio of T<sub>high</sub> to T<sub>periode</sub>:

	: ~~<nowiki><math>~~DC [\%] = ~~\frac{T_{~~high~~}}{T_{~~low} + ~~T_{high}}~~<~~/math~~></~~nowiki~~>		: DC[%] = T<sub>high</sub> / (T<sub>low</sub>+T<sub>high</sub>)

	Fig 10.		Fig 10.

ZeeKay: /* Pierburg */

2026-02-16T15:34:32Z

Pierburg

← Older revision		Revision as of 15:34, 16 February 2026
Line 79:		Line 79:

	https://tecomotive.com/store/en/water-pumps/?o=1&p=1		https://tecomotive.com/store/en/water-pumps/?o=1&p=1

			=== CWA200 ===
			Operation voltage: 8-16 volts

			Weight: approx. 2.15 kg

			Current consumption: 15A (16.5A max.) / (approx. 0.2mA in standby mode)

			Nominal diff. pressure: 0.45 bar *

			Flow rate: ca. 116 l/min @ 0.45bar / 166 l/min @ 0.30bar

			Speed: approx. 4500 rpm

			Temperature range: -40°C – 128°C (water) / -40°C – 140°C (ambient)

			Protection: IP67

			==== Part numbers: ====
			Pierburg: 7.02851.20.0 / 7.02851.20.8 / 7.00294.17.0

			BMW: 11517586925 / 11517586924 / 11517563183 / 11517546994 / 11517545201 / 11517521584

			==== PWM Input ====
			The PWM input is a unidirectional signal input which can be used to control the pump speed.

			===== Input frequency =====
			The frequency of the PWM signal can be in the following range:

			* '''Range:''' 50 to 1000 Hz

			'''Note:''' To make sure that the pump awakes under PWM controlling, an uninterrupted high pulse of at least 3 ms is necessary at the PWM input. For example: this is automatically achieved at a PWM frequency of 150 Hz and a duty cycle of 50% or above.

			===== Duty cycle =====
			The percentage duty cycle (DC) is represented by the ratio of T<sub>high</sub> to T<sub>periode</sub>:

			: <nowiki><math>DC [\%] = \frac{T_{high}}{T_{low} + T_{high}}</math></nowiki>

			Fig 10.
			[[File:Pierburg CWA200 PWM duty cycle definition.png\|none\|thumb\|400x400px\|Fig. 10: Definition of the duty cycleTypical square wave PWM signal showing V<sub>Hi</sub>, V<sub>Lo</sub>, T<sub>high</sub>, T<sub>low</sub>, and period.]]

			===== Input level PWM =====
			{\| class="wikitable"
			!Signal description
			!Max
			!Min
			\|-
			\|V<sub>Hi</sub>
			\|U<sub>B</sub> + 3 V<sup>*</sup>
			max. 28 V (60 s)<sup>*</sup>
			\|0.6 U<sub>B</sub>
			\|-
			\|V<sub>Lo</sub>
			\|0.4 U<sub>B</sub>
			\|GND - 3 V<sup>*</sup>
			\|}
			U<sub>B</sub> = Power supply <sup>*</sup> Absolute maximum ratings!

			===== Schematic of PWM interface =====
			Fig 11.
			[[File:Pierburg CWA200 PWM interface schematic.png\|none\|thumb\|Fig. 11: Schematic of PWM-InterfaceCircuit diagram showing PWM input conditioning with resistors, capacitors, diode, and connection to microcontroller (µP).]]

			===== Ratio between duty cycle and speed =====
			The ratio between duty cycle and speed is shown in the following diagram. Fig 12.
			[[File:Pierburg CWA200 duty cycle vs speed.png\|none\|thumb\|500x500px\|Fig. 12: Duty cycle versus speedGraph showing pump speed (%) vs. PWM duty cycle (%), with distinct modes: flat at low DC (Mode 1/2), linear from ~14% to 85% (Mode 3), and flat at high DC (Mode 4).]]

			===== '''PWM modes''' =====
			{\| class="wikitable"
			!Mode
			!Duty cycle (DC)
			!Speed
			!Description
			\|-
			\|1
			\|0% – 6%
			\|Max or 0
			\|MAX if BSD = high; 0 if BSD = 0
			\|-
			\|2
			\|8% – 12%
			\|0
			\|Stop and error reset
			\|-
			\|3
			\|14% – 85%
			\|Min – Max
			\|Controlled operation. The characteristic is linear
			\|-
			\|4
			\|85% – 100%
			\|Max
			\|Full speed
			\|}
			The tolerance of the pump's interpretation of the PWM signal can vary by +/- 1% of the duty cycle.

ZeeKay: /* Bosch */

2026-02-15T21:01:13Z

Bosch

@@ Line 49: / Line 49: @@
 ===== Interchange numbers =====
 0392022002, 15076931, PEB500010
 == Pierburg ==

ZeeKay: /* Pierburg */

2026-02-15T20:24:09Z

Pierburg

← Older revision		Revision as of 20:24, 15 February 2026
Line 51:		Line 51:

	== Pierburg ==		== Pierburg ==
	Common on VW/BWMs, various sizes to suit small intercoolers to full engine coolant. PWM controlled https://tecomotive.com/store/en/water-pumps/?o=1&p=1		[[File:CWA Flow.png\|thumb\|CWA Flow Rates]]
			Common on VW/BWMs, various sizes to suit small intercoolers to full engine coolant. PWM controlled



			https://tecomotive.com/store/en/water-pumps/?o=1&p=1

ZeeKay: /* 0392022002 */

2026-02-15T19:30:53Z

0392022002

← Older revision		Revision as of 19:30, 15 February 2026
Line 28:		Line 28:
	0392020034, 10438993		0392020034, 10438993

	=== 0392022002 ===		=== 0392022002 (Cobra Pump) ===
	Similar to the 200034, but larger. Used on Supercharged Fords, etc. Suitable for higher flow intercoolers		Similar to the 200034, but larger. Used on Supercharged Fords, etc. Suitable for higher flow intercoolers.

	===== Drawings =====		===== Drawings =====