Daikin WDC, Инструкция по установке, эксплуатации и обслуживанию

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IOM 1281-2 • CENTRIFUGAL WATER CHILLERS 20 www.DaikinApplied.com
Installation
Field Wiring, Controls & Starters
NOTES for Following Wiring Diagram
1. Compressor motor starters are either factory mounted
and wired, or shipped separate for field mounting and
wiring. If provided by others, starters must comply
with the current version of Daikin Applied specification
735999901. All line and load side power conductors
must be copper with ampacity based on 75°C conductor
rating. Exception: For equipment rated over 2000 volts,
90°C or 105°C rated conductors shall be used.
2. If starters are freestanding, then field wiring between the
starter and the control panel is required. Minimum wire
size for 115 Vac to 220 Vac is 12 gauge for a maximum
length of 50 feet. If greater than 50 feet, refer to Daikin
Applied for recommended wire size minimum. Wire
size for 24 Vac is 18 gauge. All wiring to be installed as
NEC Class 1 wiring system. All 24 Vac wiring must be
run in separate conduit from 115 Vac to 220 Vac wiring.
Main power wiring between starter and motor terminal
is factory-installed when units are supplied with unit-
mounted starters. Wiring of free-standing starter must
be wired in accordance with NEC and connection to
compressor motor terminals must be made with copper
wire and copper lugs only. Control wiring on free-
standing starters is terminated on a terminal strip in the
motor terminal box (not the unit control panel). Wiring
from the unit control panel to the motor terminal is done
in the factory.
3. For optional sensor wiring, see unit control diagram. It is
recommended that DC wires be run separately from 115
Vac to 220 Vac wiring.
4. Customer furnished 24 or 230 Vac power for alarm relay
coil can be connected between UTB1 terminals 84 power
and 86 neutral of the control panel. For normally open
contacts, wire between 82 & 86. For normally closed
contacts, wire between 83 & 86. The alarm is operator
programmable. The maximum rating of the alarm relay
coil is 25 VA.
5. Remote on/off control of unit can be accomplished by
installing a set of dry contacts between terminals 27 and
21 and remove wire jumper.
6. Evaporator and condenser flow switches are required.
Thermal dispersion flow switches are installed and wired
from the factory as standard.
7. Customer supplied 24 to 230 Vac, 20 amp power for
optional evaporator and condenser water pump control
power and tower fans is supplied to unit control terminals
(UTBI) 85 power / 86 neutral, PE equipment ground.
8. Optional customer supplied 24 to 220 Vac, 25 VA
maximum coil rated chilled water pump relay (EP 1 & 2)
may be wired as shown. This option will cycle the chilled
water pump in response to chiller demand.
9. The condenser water pump must cycle with the unit. A
customer supplied 24-220 Vac 25 VA maximum coil rated
condenser water pump relay (CP1 & 2) is to be wired
as shown. Units with free cooling must have condenser
water above 60°F before starting.
10. Optional customer supplied 24-220 Vac, 25 VA maximum
coil rated cooling tower fan relays (C1 - C2 standard,
C3 - C4 optional) may be wired as shown. This option
will cycle the cooling tower fans in order to maintain unit
head pressure.
11. For VFD, Wye-Delta, and solid state starters connected
to six (6) terminal motors. The conductors between the
starter and motor carry phase current and selection
shall be based on 58 percent of the motor rated load
amperes (RLA). Wiring of free-standing starter must
be in accordance with the NEC and connection to the
compressor motor terminals shall be made with copper
wire and copper lugs only. Main power wiring between
the starter and motor terminals is factory-installed when
chillers are supplied with unit-mounted starters.
12. Motor current has three selectable options as follows:
0-5V/0- 10V/0- 20mA by build in HMI.
Compressor VFD speed has two selectable options as
follows:0-10V/4 - 20mA.
13. Optional BAS communications modules. The locations
and interconnection requirements for the various
standard protocols are found in their respective
installation manuals, obtainable from the local Daikin
Applied sales office and also shipped with each unit:
Modbus IM 743 LonWorks IM 735 BACnet IM 906
14. “Full Metering” capability will require some field wiring
when free-standing starters are used. Wiring will depend
on chiller and starter type. Consult the local Daikin
Applied sales office for information on specific selections.