Condenser Fan Control - Daikin WGZ030DW Operating And Maintenance Manual
Water-cooled scroll compressor chillers 30 to 200 tons, 105 to 700 kw r-410a 50-60 hertz
Hide thumbs
Also See for WGZ030DW:
- Installation and maintenance manual (64 pages) ,
- Installation, operation and maintenance manual (112 pages) ,
- Installation, operation and maintenance manual (80 pages)
Table of Contents
Advertisement
directions and the sequence of operation can be found on page 65. Some means of discharge pressure
control must be installed if the condenser water temperature can fall below 60°F (16°C).
Condenser Fan Control
Model AC chillers equipped with air-cooled or evaporative-cooled condensers usually require some form
of discharge pressure control. The MicroTech II controller can be programmed to provide this function
by cycling condenser fans based on the unit discharge pressure. Directions on the pressure settings can be
found on page 65. The following charts illustrate how four controller outputs can control six fan steps.
Circuit 1
Number of Fans = 4
Fan
Fan
Stage #
1
3
1
ON
2
ON
ON
Number of fans = 8
Fan
Fan
Fan
Stage #
1
3
5&7
1
ON
2
ON
ON
3
ON
4
ON
ON
Circuit 2
Number of Fans = 4
Fan
Fan
Stage #
2
4
1
ON
2
ON
ON
Number of fans = 8
Fan
Fan
Fan
Stage #
2
4
6&8
ON
1
2
ON
ON
3
ON
ON
ON
4
ICE
In ICE mode, the compressors stage to 100% load until the LWT is less than the ICE LWT SP. Then
Compressors #3 and #4 shut down. Following that, Compressors #1 and #2 shut down after going
through normal pumpdown on both circuits. There is a programmable, start-to-start, Ice Mode Start
Delay that limits the frequency of starts when in the ice mode. The timer can be manually cleared to
force a restart.
16
Number of fans = 6
Fan
Fan
Fan
Stage #
1
3
5
1
ON
2
ON
ON
3
ON
ON
ON
(R410A)Number of fans = 10
Fan
Fan
Stage #
1
3
1
ON
2
ON
ON
ON
3
ON
ON
4
ON
ON
5
ON
ON
Number of fans = 6
Fan
Fan
Fan
Stage #
2
4
6
1
ON
2
ON
ON
3
ON
ON
ON
(R410A)Number of fans = 10
Fan
Fan
Stage #
2
4
ON
1
2
ON
ON
ON
3
ON
ON
ON
ON
4
5
ON
ON
WGZ030D through WGZ200D
Number of fans = 8
Fan
Fan
Fan
Stage #
1
3
5
1
ON
2
ON
ON
3
ON
ON
ON
4
ON
ON
ON
Fan
Fan
5&7
9
Stage #
1
2
ON
3
ON
4
ON
ON
5
6
Number of fans = 8
Fan
Fan
Fan
Stage #
2
4
6
1
ON
2
ON
ON
3
ON
ON
ON
4
ON
ON
ON
Fan
Fan
6&8
10
Stage #
1
2
ON
3
ON
4
ON
ON
5
6
Fan
7
ON
(R410A)Number of fans = 12
Fan
Fan
Fan
Fan
1
3
5&7
9&11
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
Fan
8
ON
(R410A)Number of fans = 12
Fan
Fan
Fan
Fan
2
4
6&8
10&12
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
OMM 1130-2
Hide quick links:
Advertisement
Table of Contents
