Instruction/ maintenance manual of the product WMR-21 Weil-McLain
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120 V AC Circuit ON Weil-McLain Michigan City , IN WMR-21 Switching Relay T L2 L1 3 4 5 6 R C 24V T W Made in U.S.A. P art Number 550-141-859/0799 Zone Controller This manual must only be used by a qualified heating installer/service t echnician . Failure to c omply could result in sev ere personal injury , death or substantial pro p erty damage.
2 P art Number 550-141-859/0799 Contents Hazard definitions and “To the installer” .............................................................. 2 Specifications and replacement parts ..............................................................
P art Number 550-141-859/0799 3 WMR -21 — Double pole/single throw switching relay WMR -22 — Double pole/double throw switching relay WMR-22 cross reference table WMR-21 cross reference table 120 V AC Circuit ON Weil-McLain Michigan City , IN WMR-21 Switching Relay T L2 L1 3 4 5 6 R C 24V T W Made in U.
4 P art Number 550-141-859/0799 Electrical shock hazard — Disconnect po wer before installing or servicing . C an cause severe pe rsonal injury , death or substantial pr oper ty damage if ignored. All wir ing must be installed in acc ordance with: U.
An important point after buying a device Weil-McLain WMR-21 (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Weil-McLain WMR-21 yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Weil-McLain WMR-21 - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Weil-McLain WMR-21 you will learn all the available features of the product, as well as information on its operation. The information that you get Weil-McLain WMR-21 will certainly help you make a decision on the purchase.
If you already are a holder of Weil-McLain WMR-21, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Weil-McLain WMR-21.
However, one of the most important roles played by the user manual is to help in solving problems with Weil-McLain WMR-21. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Weil-McLain WMR-21 along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
