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Operation manual
1
EWLD120~540MBYNN
Condenserless water-cooled water chillers
4PW22687-1
C
ONTENTS
Page
Technical specifications ............................................................................. 1
Electrical specifications ............................................................................. 2
Function of the main components.............................................................. 4
Safety devices............................................................................................ 5
Internal wiring - Parts table ........................................................................ 5
Before operation................................................................................ 6
Checks before initial start-up ..................................................................... 6
Water supply .............................................................................................. 7
Power supply connection and crankcase heating...................................... 7
General recommendations ........................................................................ 7
Digital controller ......................................................................................... 7
Working with the unit ................................................................................. 8
Advanced features of the digital controller............................................... 10
Troubleshooting ............................................................................... 17
Maintenance.................................................................................... 19
I
NTRODUCTION
The unit is supplied and shipped with a holding charge of 0.5 bar
nitrogen (N
2
). This unit has to be charged with ozon friendly R-134a
refrigrant.
Pay attention to the selection of your remote condenser. Make sure to
select a remote condenser developed for use with R-134a.
This operation manual concerns condenserless water-cooled water
chillers of the Daikin EWLD-MBYNN series. These units are provided
for indoor installation and used for cooling applications. The EWLD
units can be combined with Daikin fan coil units or air handling units
for air conditioning purposes. They can also be used for supplying
water for process cooling.
This manual has been prepared to ensure adequate operation and
maintenance of the unit. It will tell you how to use the unit properly
and will provide help if problems occur. The unit is equipped with
safety devices, but they will not necessarily prevent all problems
caused by improper operation or inadequate maintenance.
In case of persisting problems contact your local Daikin Dealer.
Technical specifications
(1)
EWLD120MBYNN
EWLD260MBYNN
EWLD480MBYNN
EWLD170MBYNN
EWLD340MBYNN
EWLD500MBYNN
EWLD240MBYNN
EWLD400MBYNN
EWLD540MBYNN
Condenserless water-cooled water chillers
Operation manual
READ THIS MANUAL ATTENTIVELY BEFORE STARTING
UP THE UNIT. DO NOT THROW IT AWAY. KEEP IT IN
YOUR FILES FOR FUTURE REFERENCE.
Before starting up the unit for the first time, make sure that
it has been properly installed. It is therefore necessary to
carefully read the installation manual supplied with the unit
and the recommendations listed in "Checks before initial
start-up".
(1) Refer to the engineering data book for the complete list of specifications.
General EWLD
120
170
240
Dimensions HxWxD
(mm)
1014x2672x930
Weight
• machine weight
(kg)
891
1110
1342
• operation weight
(kg)
907
1130
1369
Connections
• chilled water inlet and
outlet
(inch)
3"OD
(76 mm OD)
3" (88.9 mm OD)
• remote condenser connection
discharge
(inch)
2"1/8
2"1/8
2"1/8
liquid
(inch)
7/8"
1"1/8
1"3/8
• high pressure relief valve
(inch)
1x 1"
1x 1"
2x 1"
Compressor
Type
semi-hermetic single screw
Qtyxmodel
1x
ZHA5LMGUYE
1x
ZHA7MSGUYE
1x
ZHA7WSGUYE
Speed
(rpm)
2880
Oil type
FVC68D
Oil charge volume
(l)
7,5
+0.5
–0
10
+0.5
–0
10
+0.5
–0
Condensor
refer to engeneering specifications as published by the supplier of your remote
condenser
Evaporator
Type
brased plate heatexchanger
Qtyxmodel
1x AC120EQ-NP156 1x AC250EQ-NP96 1x AC250EQ-NP128
General EWLD
260
340
400
Dimensions HxWxD
(mm)
1014x2672x930
2000x2672x930
Weight
• machine weight
(kg)
1428
2220
2452
• operation weight
(kg)
1462
2260
2497
Connections
• chilled water inlet and
outlet
(inch)
3"
(88.9 mm OD)
2x 3" (88.9 mm OD)
• remote condenser connection
discharge
(inch)
2"5/8
2x 2"1/8
2x 2"1/8
liquid
(inch)
1"3/8
2x 1"1/8
1"1/8+1"3/8
• high pressure relief valve
(inch)
2x 1"
2x 1"
3x 1"
Compressor
Type
semi-hermetic single screw
Qtyxmodel
1x
ZHA9LSGUYE
2x
ZHA7MSGUYE
1x ZHA7MSGUYE
1x ZHA7WSGUYE
Speed
(rpm)
2880
Oil type
FVC68D
Oil charge volume
(l)
14
+0.5
–0
2x 10
+0.5
–0
2x 10
+0.5
–0
Condensor
refer to engeneering specifications as published by the supplier of your remote
condenser
Evaporator
Type
brased plate heatexchanger
Qty x model
1x AC250EQ-NP162
2x AC250EQ-NP96
1x AC250EQ-NP96
1x AC250EQ-NP128