Issue
Satchwell ZKM series Rotary Actuator requires replacement due to obsolescence.
Environment
- Satchwell ZKM Rotary Actuator installed on Satchwell MBF series Rotary Shoe Valve Body.
- Satchwell ZKM Rotary Actuator installed on Satchwell MZF series Plug and Seat Valve Body.
Cause
Obsolescence of Satchwell ZKM series Rotary Actuator
Resolution
OVERVIEW
The Satchwell ZKM Actuator was compatible with both Satchwell MBF series Flanged Rotary Shoe Valve Bodies and Satchwell MZF series Flanged Plug and Seat Valve Bodies, subject to the installation of an appropriate Linkage Kit.
Various models of the ZKM Actuator were available, each differing in the number and type of electrical interface provided, enabling the Actuator to be installed in a range of control applications.
Interfaces included Transfer Switches, Auxiliary Switches and Feedback Potentiometers, thus resulting in differing wiring connection options between the ZKM Actuator and its associated Controller and other peripherals.
Details of the numerous ZKM Actuator variations available may be viewed here.
In view of the differing wiring connection options that may be found on site, it is intended to deal only with the most common 6-wire connection option here.
Please therefore check the number of wires connected to the ZKM Actuator before proceeding, as this will assist in confirming the suitability of the ZKM Actuator 6-wire connection option replacement suggestion described here.
1. ACTUATOR REPLACEMENT
The Actuator comprising a 6 wire electrical connection enabled it to be operated from a Satchwell Z Monotronic or CZT Climatronic Proportional Controller as follows :-
Terminal 1 – Open signal
Terminal 2 – Close signal
Terminal 3 – Common
Terminal A – 135 ohm Feedback Potentiometer – winding
Terminal B – 135 ohm Feedback Potentiometer – wiper
Terminal C – 135 ohm Feedback Potentiometer – winding
If all 6 wires are connected then the ZKM Actuator may be replaced either by the Schneider Electric MD20A Actuator or the M800 Actuator, depending on the type of Valve Body to be controlled :-
MBF ROTARY SHOE VALVE BODY APPLICATIONS :-
MD20A-24 + Linkage Kit LMD-MBF (914-1070-000)
Details of the MD20A Actuator may be viewed here
Details of the LMD-MBF Linkage Kit may be viewed here
N.B.
Should the Satchwell ZKM series Actuator include a wired Auxiliary Switch then the following Accessory should also be installed on the S-E MD20A Actuator as appropriate :-
MD-S2 - Two independent SPDT 1mA -- 3(0.5)A, 250 V AC Auxiliary Switches. (914-1061-000)
Should the Satchwell ZKM series Actuator include a wired Transfer Switch then the following Accessory should also be installed on the S-E MD20A Actuator as appropriate :-
MD-S2 - Two independent SPDT 1mA -- 3(0.5)A, 250 V AC Auxiliary Switches. (914-1061-000)
Details of the MD-S2 Auxiliary Switch Kit may be viewed here
MZF PLUG AND SEAT VALVE BODY APPLICATIONS :-
M800 + Linkage Kit L2SV (880-0124-000)
Details of the M800 Actuator may be viewed here
Details of the L2SV Linkage Kit may be viewed here
N.B.
Should the Satchwell ZKM series Actuator include a wired Auxiliary Switch then the following Accessory should also be installed on the S-E M800 Actuator as appropriate :-
S2 - Two independent 24 volt 4amp AC-1 rated SPDT Auxiliary End Point Switches. (880-0104-000)
Should the Satchwell ZKM series Actuator include a wired Transfer Switch then the following Accessory should also be installed on the S-E M800 Actuator as appropriate :-
S2 - Two independent 24 volt 4amp AC-1 rated SPDT Auxiliary End Point Switches. (880-0104-000)
Particular care should be taken when selecting an S-E Forta M800 Actuator to replace an existing Satchwell ZKM series Actuator.
The S-E Forta M800 Actuator may be used to replace an existing Satchwell ZKM series Actuator but it should be noted that where this is to be connected directly to a Satchwell Controller, an independent Transformer rated to provide the greater level of power required by a single S-E Forta M800 Actuator (50VA) compared to that available at the CZT Controller (10VA) will also be required. (e.g. S-E Transformer Type TR60)
Details of the Schneider Electric TR60 Transformer may be viewed here
In such installations not only will the ZKM need to be replaced but the associated Proportional Controller will also need to be replaced.
2. PROPORTIONAL CONTROLLER REPLACEMENT
The ZKM Actuator was compatible with a number of Satchwell Proportional Controller types including Z Monotronic, CZT Series 1 and CZT Series 3
Z MONTRONIC CONTROLLER APPLICATIONS :-
If the Proportional Controller is a Z Monotronic type then this should be replaced by the Satchwell CZT5305 Proportional Controller.
The associated Satchwell 3 wire Sensor will also need to be replaced by a S-E 2 wire Sensor compatible with the CZT5305
Details of a compatible Room Temperature Sensor may be viewed here.
Details of a compatible Duct Temperature Sensor may be viewed here.
Details of a compatible Immersion Temperature Sensor may be viewed here.
The replacement Immersion Temperature Sensor may be installed in the existing Immersion Temperature Sensor Pocket with the aid of an Adaptor DWA0001.
Details of the DWA0001 Adaptor may be viewed here.
Details of the CZT5305 may be viewed here.
CZT CONTROLLER APPLICATIONS :-
If the Proportional Controller is a CZT Series 1 or CZT Series 3 type then this should be replaced by the Satchwell CZT5305 Proportional Controller.
The associated Satchwell 2 wire Sensor may be retained if desired.
Details of the CZT5305 may be viewed here.
