7 Installation
Installer reference guide
35
EWAQ+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
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.
Heater tape model (-H- in the
model name)
The internal water piping is
factory‑equipped with heater
tape and additional insulation,
this to prevent it from freezing.
To prevent the outdoor field
piping from freezing, provide it
with sufficient insulation or heater
tape (field supply), according to
the instructions below.
Heater tape (field supply)
1
Install heater tape to the outdoor field piping.
2
Provide external power supply for the heater tape.
NOTICE
▪ For the internal heater tape to operate, the power to the
unit MUST be ON. For this reason, during cold periods,
never disconnect the power, nor turn off the main
switch.
▪ In case of a power failure, power to the heater tape
(both internal and external) will be aborted and the
water circuit will NOT be protected. To guarantee a full
protection, it is always possible to add glycol to the
water circuit, even when installing heater tape to the
outdoor field piping.
Glycol
The required concentration of glycol depends on the lowest
expected outdoor temperature, and on whether you want to protect
the system from bursting or from freezing. To prevent the system
from freezing, more glycol is required. Add glycol according to the
table below.
INFORMATION
▪ Protection against bursting: the glycol will prevent the
piping from bursting, but NOT the liquid inside the
piping from freezing.
▪ Protection against freezing: the glycol will prevent the
liquid inside the piping from freezing.
Lowest expected
outdoor
temperature
Prevent from
bursting
Prevent from
freezing
–5°C
10%
15%
–10°C
15%
25%
–15°C
20%
35%
