7 Installation
Installer reference guide
34
EWAQ+0 EK(2)CB
EKMB9W1
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492901-1 – 2017.06
To connect the 3-way valve
1
Unpack the 3‑way valve body and 3‑way valve motor and verify
that the following accessories are provided with the motor.
a
b
c
d
a
Sleeve
b
Valve motor cover
c
Screw
d
Scale
2
Connect the 3‑way valve body to the water inlet of the backup
heater, in accordance with one of the following four
configurations. Position the shaft in such a way that the motor
can be mounted and replaced.
1
2
3
1
3
2
1
2
3
1
3
2
E3
E1
E2
E4
1
From outdoor unit
2
To bypass
3
To backup heater
3
Put the sleeve on the valve and turn it until the valve is
positioned as in the figure below. It should be blocking the
outlet connection to the bypass for 50% and the outlet
connection to the backup heater for 50%.
E1+E3
E2+E4
4
When installing in accordance with configurations E3 or E4,
open the valve motor cover by loosening the screw and change
the jumper so as to change the rotation direction of the valve.
DIR
2P
Y
N
L
Position of the jumper in case of installation according to
configurations E1 and E2.
Position of the jumper in case of installation according to
configurations E3 and E4.
INFORMATION
The jumper is factory‑set to apply for installation in
accordance with configurations E1 and E2.
5
Put the knob on the motor in a 12 o'clock position and push the
motor on the sleeve. Do NOT rotate the sleeve during this
action, so as to maintain the valve position as set during step 4.
6
Put the scale on the valve according to the applicable
configuration.
a
a
b
b
E1+E2
E3+E4
a
Bypass
b
Backup heater
7
To provide stress relief, fix the power supply cable to the 3‑way
valve body with a cable tie (field supply). Fix it so that possible
condensate cannot enter the 3‑way valve motor via the cable.
1×
7.7.6
To protect the water circuit against
freezing
Frost can damage the system. For this reason, if negative ambient
temperatures are expected, make sure the water circuit is sufficiently
protected against freezing. Freeze protection is model-dependent.
Either add glycol to the water circuit, or provide the outdoor field
piping with heater tape, according to the table below.
If …
… then
Standard model (no -H- in the
model name)
Add glycol to the water circuit,
according to the instructions
below. In this way, you protect
the internal water piping, as well
as the outdoor field piping.