Installation Guide
3/4" & 1" 3-Way Diverting Electronic Control Valves
VEP–3420, 3421 Series
NOTE: Models
do not include
HMO–5026/5027 MPT unions as
shown. Order separately.
DIMENSION REFERENCE
A
B
C
D
3/4" MPT
3 13/16" (97)
2 3/4" (70)
5 1/8" (130)
1" MPT
4 1/16" (103)
3 1/8" (79)
5 7/8" (149)
Mounting
Valves are sized to meet the system demand and may
be smaller than the supply lines.
1. Clean the lines upstream from the valve. Remove
any debris > .06" (.15 mm)
2. Install as close as possible to the coil in a vertical
position (actuator over the valve).
CAUTION
: Mount valve with the actuator in the
upright position, or at most a 45° angle, to prevent
condensation collecting in the actuator housing.
3. Align system flow with arrow on valve.
4. The MPT unions are not provided and must be
ordered separately.
3/4" valves
Order: Three HMO–5026s
1" valves
Order: Three HMO–5027s
5. Seal valves with approved valve sealant
6. Allow a minimum clearance of 1-1/2 " (38mm)
between the top of the actuator and the nearest
obstruction. Allow sufficient side clearance for
servicing the valve.
Required Tools
• digital voltmeter
• small screwdriver
• 2 wrenches
