Daikin ThinLine FCVC, Installation And Maintenance Manual

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Page 79 © 2011
Daikin
800-432-1342
www.DaikinApplied.com
IM 763 - Automatic Changeover Switch
Safety Information
Introduction
These line voltage changeover switches are designed to switch
a thermostat from heating to cooling based on a change in
supply water temperature. The switches can be mounted on
5/8" or 7/8" O.D. copper tube or iron pipe.
Both models are easily mounted to the supply piping with a
simple spring clip included with the thermostat.
Procedure
Models
The 039398600 model (fig. 1) has 110 in. leads and is the
standard changeover switch. The 06361801 model (fig. 2) has
the same operating characteristics and includes 18 in. conduit
and connector.
Both models are snap acting, SPDT switches.
Figure 1: Automatic Changeover Switch
(Kit P/N 039398600)
Terminal No. 1 has a black wire and is the common (C)
connected to valve (valve cycle) or to the yellow wire of the
speed switch (fan cycle).
Terminal No. 2 has a red wire and is normally open (N.O.).
Connected to the heating (red) wire of the thermostat.
Terminal No. 3 has a blue wire and is normally closed (N.C.).
Connected to the cooling (blue) wire of the thermostat.
At approximately 65°F, plus or minus 6°F, terminals 1 and 3
are closed and terminals 1 and 2 are open. At 95°F, plus or
minus 6°F, terminals 1 and 2 are closed and terminals 1 and 3
are open.
Installation and Maintenance Manual IM 763
Automatic Changeover Switch for
Automatic Seasonal Changeover on
Two-pipe Systems Group: Applied Air Systems
Part Number: 10333101
Date: August 2002
WARNING
Installation and maintenance are to be performed only by
qualified personnel who are familiar with and in compliance with
state, local and national codes and regulations, and
experienced with this type of equipment.
CAUTION
Sharp edges and coil surfaces are a potential injury hazards.
Avoid contact with them.