IM 1151 Installing A Motorized Valve for use with

IM 1151 Installing A Motorized Valve for use with
Installation and Maintenance Manual
IM 1151
Group: WSHP
Document PN: 910131453
Date: November 2016
Installing A Motorized Valve For Use With
MicroTech® III Smart Source Unit Controller
The motorized valve kit is available as a factory-installed
and wired option or may be ordered as a field-installed
Wired as shown in Figure 8, the motorized valve will
open on a call for compressor operation.
The motorized isolation valve actuator (ISO) has both a
24V power connection and a 24V end switch connection.
A green LED light shows full functionality of the valve’s
operation and status. Under a no power situation the
manual override button located on the top of the valve
allows the ball to be rotated up to 90° and is also marked
with a slot to indicate the position of the valve.
Note the placement of the water control valve in Figure 3.
Figure 3: Typical open loop application
Figure 1: Two-way motorized valve kit
Optional 2-way
Installation Considerations
The valve can be installed in any direction, in any orientation except for chilled water installations (see Figure 2).
Figure 2: Permitted angle of installation on chilled water
Always maintain water pressure in the heat exchanger
by placing the water control valve(s) on the return line to
prevent mineral precipitation during the off-cycle. Pilot
operated slow closing valves are recommended to reduce
water hammer. If water hammer persists, a mini-expansion tank can be mounted on the piping to help absorb the
excess hammer shock. If a field provided motorized valve
and actuator is utilized, ensure that the total ‘VA’ draw of
the valve can be supplied by the unit transformer. Units
are furnished with a factory-installed 50 VA transformer.
An optional 75VA transformer is also available.
1. On hot water applications, the valve body may be
installed in any orientation. On chilled water installations, do not install with the actuator beyond 85°
from the top-most installation (see Figure 2).
2. Before mounting the body, refer to Figure 4 for clearance requirements.
Figure 4: Valve clearances
¾" Clearance
About Soldering
• Use of a solder with a melting point below 600°F is
recommended. Do not overheat! Make sure the ball
valve is in the FULL OPEN position during soldering.
Direct flame tip away from the center of the valve.
Cool valve quickly with a wet cloth.
• Solder build-up on the ball valve may prevent proper
opening and closing of the valve. Actuate the actuator
once or twice and make sure the valve rotates fully.
• Valve body can be submerged for leak testing before
the actuator is attached
To Re-Assemble The Actuator To The Valve Body:
1. Position actuator such that the “D” shaped valve
stem aligns properly with the “D” shaped actuator
drive cavity.
Note: The “D” shaped stem design allows for correct insertion
every time.
1¾" Clearance
Actuator must be removed from the valve body before soldering
(see Figure 5). Ball valve must be in the full open position before
soldering. Valve shipped in the closed position.
Actuator Removal
To remove the valve actuator:
1. Push in and hold the release clip at the front of the
2. Lift actuator upward approximately 3⁄4" ( Figure 5).
2. Slide the valve stem into the actuator cavity, push in
and hold the release clip until the actuator slips over
the valve locking posts (see Figure 5).
3. Once the actuator is flush to the valve body, let go
of the release clip. Using very little force, try to lift
the actuator off of the valve body without using the
release clip. Both locking posts should be firmly
attached to the actuator. If the actuator slides up the
stem, repeat the assembly process.
Changing The Actuator Orientation
The actuator may be attached to the valve body in either
direction, see Figure 6.
Figure 6: Valve actuator can be attached in either direction
Figure 5: Removing the actuator from the valve body
Step 1:
Push in and hold release clip
at the front of the actuator.
Step 2:
Move actuator upward
approximately 3⁄4" to
disengage Locking Posts.
IM 1151-1
To reverse the actuator orientation on the valve body,
see the "Actuator Removal" instructions and refer to
Figure 5, with the following exception.
• Instead of lifting the actuator the full 3⁄4", move it just
high enough to clear the locking posts, rotate the
actuator 180° and reinstall it on the locking post by
following the previous instructions, "To Re-Assemble
The Actuator To The Valve Body:"
Wiring The Motorized Isolation
Valve To The MicroTech III
SmartSource Unit Controller
3. Connect the end switch wires as shown in the schematic, Figure 8. The end switch will close when the
valve is fully open, (unit sizes 015-072).
Figure 7: Plug 3-pin receptacle into terminal H8
3-pin Receptacle
plugs into H8
Wiring connections must be made in accordance with all
applicable electrical codes.
Provided wire
harness with end
connectors for field
wiring to actuator
motor ISO
Terminal H8
To prevent electrical shock, disconnect electric power to system
at main fuse or circuit breaker box until installation is complete.
When a service switch is installed, more than one disconnect
switch may be required to de energize this device for servicing
1. Install the supplied wire harness 3-pin receptacle
into the blue header terminal (H8) on the MicroTech
III SmartSource control board, (Figure 7).
2. Run wires between the Actuator Motor ISO and the
supplied wire harness end connectors, (Figure 7).
BL - N.O.
Notes:1.Connect the N.O or N.C. wire to actuator (W/Y) as shown on the schematic. The end switch should be wired in series with the 24V compressor signal wire, when applicable.
2.Only wire end switch when M11 is in unit and is controlled with 24 volts AC.
3.Use the wire end connectors provided with the kit for field wiring the actuator end switch (Figure 8).
YE - Common
BK - N.C.
Figure 8: Motorized valve wiring
IM 1151-1
Motorized Valve Modes of Operation & Troubleshooting
1. Upon initial field installation the capacitor requires a
full charge, up to 35 seconds, before the valve starts
to turn. Charging time will vary (typically less) during
normal operation.
2. When the capacitor is charging the green LED light
will FLASH.
3. Once the capacitor is charged, the green LED will
stop flashing but remain ON. At this point the valve’s
actuator will rotate the ball valve. The green LED will
remain ON as long as the thermostat is calling (the
unit is powered).
4. Once the thermostat is satisfied the green LED will turn
OFF and the valve will rotate 90° into its normal position
or non-powered position. For example: If the actuator
is an NC (normally closed) version, the actuator would
open the valve when the thermostat calls. Once the
thermostat is satisfied the actuator would then rotate the
valve 90° to its normally closed position.
Table 5: Flow coefficients and maximum close-off
Valve Size
CV (KV)/Ft. of Pipe
4.9 (4.3)/9.5
10.3 (8.9)/8.4
8.9 (7.7)/47.4
Close-Off PSI (kPa)
0-125 psi (0-862 kPa)
Note: 1 At 4' per second (maximum recommended residential flow rate).
Table 6: Multi-status LED and troubleshooting
LED Status
Not Illuminated
Power off
Steady blink (once per second)
Power on
Possible Cause
Possible Solution
• No call
• No power
• Verify there is a call.
• Check for voltage at the actuator
• Reset the actuator (see note).
• Use a larger VA transformer or add an additional transformer.
• Reduce the number of valves.
• Use a different thermostat.
• Reset the actuator (see note).
• Remove obstruction.
• Clean the valve and/or system.
Slow blink (once
every 5 seconds)
Excessive charging time
• Not enough VA
• Too many valves per transformer
Double blink (twice
every 5 seconds)
Excessive opening time
• Obstruction in valve
• Buildup of contamination in valve
Note: Reset the actuator by removing power for 5 seconds and then restoring power.
All Daikin equipment is sold pursuant to its standard terms and conditions of sale, including Limited Product
Warranty. Consult your local Daikin Applied representative for warranty details. Refer to Form 933-430285Y.
To find your local Daikin Applied representative, go to
Aftermarket Services
To find your local parts office, visit or call 800-37PARTS (800-377-2787).
To find your local service office, visit or call 800-432-1342.
This document contains the most current product information as of this printing. For the most up-to-date product
information, please go to
IM 1151-1
©2016 Daikin Applied (11/16) | (800) 432–1342 |
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