Daikin EWYQ050CAWH handleiding
Handleiding
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5 Preparation
Installer and user reference guide
13
EWAQ016~064CAW + EWYQ016~064CAW
Packaged air-cooled water chiller
4P497339-1 – 2017.07
5.3.4 Changing the pre-pressure of the
expansion vessel
NOTICE
Only a licensed installer may adjust the pre-pressure of the
expansion vessel.
When changing the default pre-pressure of the expansion vessel
(1bar) is required, take following guidelines into account:
▪ Only use dry nitrogen to set the expansion vessel pre-pressure.
▪ Inappropriate setting of the expansion vessel pre-pressure will
lead to malfunction of the system.
Changing the pre-pressure of the expansion vessel should be done
by releasing or increasing nitrogen pressure through the Schrader
valve of the expansion vessel.
a
a Schrader valve
5.3.5 To check the water volume: Examples
Example 1
The unit is installed 5m below the highest point in the water circuit.
The total water volume in the water circuit is 250l.
No actions or adjustments are required.
Example 2
The unit is installed at the highest point in the water circuit. The total
water volume in the water circuit (no glycol used) is 420l.
Actions:
▪ Because the total water volume (420 l) is more than the default
water volume (340l), the pre-pressure must be decreased.
▪ The required pre-pressure is:
Pg=(0.3+(H/10))bar=(0.3+(0/10))bar=0.3bar
▪ The corresponding maximum water volume is approximately 490l
(see graph).
▪ Because 420 l is lower than 490 l, the expansion vessel is
appropriate for the installation.
5.4 Preparing electrical wiring
5.4.1 About electrical compliance
This equipment complies with:
▪ EN/IEC 61000‑3‑11
provided that the system impedance Z
sys
is
less than or equal to Z
max
at the interface point between the user's
supply and the public system.
▪ EN/IEC 61000‑3‑11 = European/International Technical
Standard setting the limits for voltage changes, voltage
fluctuations and flicker in public low-voltage supply systems for
equipment with rated current ≤75A.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a system impedance Z
sys
less than or equal to Z
max
.
▪ EN/IEC 61000‑3‑12 provided that the short-circuit power S
sc
is
greater than or equal to the minimum S
sc
value at the interface
point between the user's supply and the public system.
▪ EN/IEC 61000‑3‑12 = European/International Technical
Standard setting the limits for harmonic currents produced by
equipment connected to public low-voltage systems with input
current >16A and ≤75A per phase.
▪ It is the responsibility of the installer or user of the equipment to
ensure, by consultation with the distribution network operator if
necessary, that the equipment is connected only to a supply
with a short-circuit power S
sc
greater than or equal to the
minimum S
sc
value.
Model Z
max
(Ω) Minimum S
sc
value
(kVA)
EWAQ/EWYQ016 — 1016
EWAQ/EWYQ021 0.27 820
EWAQ/EWYQ025 0.27 821
EWAQ/EWYQ032 0.24 874
EWAQ/EWYQ040 0.25 1639
EWAQ/EWYQ050 0.25 1630
EWAQ/EWYQ064 0.22 1747
5.4.2 Cable requirements
Item Cable
bundle
Description Required
number of
conductors
Maximum
running
current
1 PS Power supply 4+GND
(b)
2 LV Standard remote controller (F1/F2) 2
(c)
3 LV Secondary remote controller (F1/F2)
(a)
2
(c)
4 LV Thermostat ON/OFF signal
(a)
2
(c)
5 LV Thermostat cooling/heating signal
(a)
2
(c)
6 LV Operation ON signal
(a)
2
(c)
7 LV Operation OFF signal
(a)
2
(c)
8 HV Cooling/heating output 2 0.3 A
9 HV Operation ON/OFF output 2 0.3 A
10 HV Error output 2 0.3 A
11 HV Water piping heater output 2 1 A
12 HV Pump ON/OFF output 2 0.3 A
(d)
(a) Optional
(b) Refer to the nameplate on the unit or to the technical data
book.
(c) Minimum cable section 0.75mm
2
.
(d) Only for models with pump (EWAQ*CAW(P/H)* and
EWYQ*CAW(P/H)* units).
PS Power supply
LV Low voltage
HV High voltage
5.4.3 Safety device requirements
The power supply must be protected with the required safety
devices, i.e. a main switch, a slow blow fuse on each phase and an
earth leakage protector in accordance with the applicable legislation.
Selection and sizing of the wiring should be done in accordance with
the applicable legislation based on the information mentioned in the
table below.
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Productinformatie
| Merk | Daikin |
| Model | EWYQ050CAWH |
| Categorie | Niet gecategoriseerd |
| Taal | Nederlands |
| Grootte | 8322 MB |
