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Typical Valve Packages
The optional factory-supplied Daikin Control Valve(s) for water
applications can be either 2-way or 3-way type, and is / are shipped
separate from the unit ventilator itself to help avoid shipping damage
to the piping of the connection stub from the weight of the valve, and
to provide the installer with maximum flexibility in making the field
piping connection. Before proceeding, see figures 60 through 84 as
applicable, as well as the job-specific piping drawings.
Notes:
1. See label furnished on 2-way valve to determine direction of flow
through the valve.
2. Adhere to the port orientation shown for the 3-way valve.
3. For hot water applications and chilled water/hot water (2-pipe)
applications, the 2-way valve furnished is normally piped open to
the coil; the 3-way valve is piped normally open to the coil.
4. For chilled water applications, the 2-way valve furnished is normally
piped closed to the coil; the 3-way valve is piped normally closed to
the coil.
5. The 3-way valve is generally selected for diverting water back to the
return main, where a constant pump head pressure is required.
6. All water coil stubs are 7/8" I.D. female sweat. Coil connections
terminate 9" (229mm) from the end of the unit. Hot water connections
may be same end as cooling coil connections, but are recommended
to be at opposite ends from each other. When using MicroTech II
controls, they must be at opposite ends.
Face and Bypass – MicroTech II™
2-Way and 3-Way End-of-Cycle Valves
Figure 60 - 2-way End of Cycle Valve
Table 10 - 2-way Actuator
Control
Electrical
Stroke
Power Stroke 9 to 11 seconds
Spring return 4 to 5 seconds
o
Ambient
32
Table 11 - 2-way Valve Body
Connections
Static Pressure
Close-Off Pressure
(90 kPa and 103 kPa)
Temperature
32
o
IM 817-4
2 Position
24 VAC, 50/60 Hz
F (0
C)
o
o
o
F to 125
C to 52
⁄
" FNPT, 1" FNPT
3
4
300 psi (2100 kPa)
13 psi and 15 psi
F (0
C)
F to 200
o
o
C to 93
o
Figure 61 - 3-way End of Cycle Valve
Table 12 - 3-way Actuator
Control
Electrical
Power Stroke 9 to 11 seconds
Stroke
Spring return 4 to 5 seconds
Ambient
32
o
Table 13 - 3-way Valve Body
Connections
Static Pressure
Close-Off Pressure
Temperature
32
o
Table 14 - EOC Connection
Connection
C
v
⁄
⁄
"(19mm) FNPT
7.0
1
3
11
4
16
⁄
*1"(25mm) FNPT
7.0
1
7
" (47mm)
8
* 1" valve for steam only
2 Position
24 VAC, 50/60 Hz
F (0
C)
F to 125
o
o
C to 52
o
⁄
" FNPT
3
4
300 psi (2100 kPa)
13 psi (90 kPa)
F (0
C)
F to 200
o
o
C to 93
o
X
Y
⁄
⁄
" (43mm)
" (23mm)
3
11
5
16
⁄
1" (25mm)
3
11
Page 21 of 60
Z
" (92mm)
8
" (94mm)
16
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