MCC6 – findings 05/11/2009
1. AHU301 Supply Fan, Sheet 4:
Inverter TBA should be changed to: Danfoss VLT FC102 P5K5
KW 7.5 should be changed to: 5.5
AFLC TBA should be changed to: 10.8A
Comments:
Although still waiting for the connection details for the inverters (RFI86), I was able to identify the Danfoss VLT FC102 P5K5 to be the inverter that is used based on the response to our RFI: Frequency inverter incl. isolator, Danfoss, 5,5kW - 13A - 400V - IP55 - H3
Product brochure:
http://nozebra.ipapercms.dk/Danfoss/DD/Global/Products/FC/HVAC/ProductBrochure/
pg 22/23 identifies the model
pg 24/25 shows the wiring diagram; I would assume that is up to use how to set-up the inverters and what relay to collect the fault signal.
2. AHU301 Extract Fan, Sheet 5:
Inverter TBA should be changed to: Danfoss VLT FC102 P4K0
AFLC TBA should be changed to: 8.1A
Comments:
Although still waiting for the connection details for the inverters (RFI87) , I was able to identify the Danfoss VLT FC102 P4K0 to be the inverter that is used based on the response to our RFI: Frequency inverter incl. isolator, Danfoss, 4kW - 10A - 400V - IP55 - H3
3. HUM301 Ballroom Humidifier, Sheet 6
KW 44 is not confirmed yet; we are waiting for a reply on RFI 89
AFLC TBA is not confirmed yet; we are waiting for a reply on RFI 89
Comments:
The Mechanical Spec states that the SKE60M is to be used and based on that we can fairly assume that the KW = 44 and that the AFLC = 64 as per the manufacturer data sheet that we were provided.
4. HUM302 Ballroom Humidifier, Sheet 7
KW 60 is not confirmed yet; we are waiting for a reply on RFI 95
AFLC TBA is not confirmed yet; we are waiting for a reply on RFI 95
Comments:
The Mechanical Spec states that the SKE80M is to be used and based on that we can fairly assume that the KW = 60 and that the AFLC = 87 as per the manufacturer data sheet that we were provided.
5. AHU302 Supply Fan, Sheet 8:
Inverter TBA should be changed to: Danfoss VLT FC102 P18K
AFLC TBA should be changed to: 35.18A
Comments:
Although still waiting for the connection details for the inverters (RFI92), I was able to identify the Danfoss VLT FC102 P18K to be the inverter that is used based on the response to our RFI:
Frequency inverter incl. isolator, Danfoss, 18,5kW - 37,5A - 400V -IP55 - H3
Product brochure:
http://nozebra.ipapercms.dk/Danfoss/DD/Global/Products/FC/HVAC/ProductBrochure/
pg 22/23 identifies the model
pg 24/25 shows the wiring diagram; I would assume that is up to use how to set-up the inverters and what relay to collect the fault signal.
6. AHU302 Extract Fan, Sheet 9:
Inverter TBA should be changed to: Danfoss VLT FC102 P15K
KW 11 should be changed to: 15
AFLC TBA should be changed to: 28.5A
Comments:
Although still waiting for the connection details for the inverters (RFI93) , I was able to identify the Danfoss VLT FC102 P15K to be the inverter that is used based on the response to our RFI: Frequency inverter incl. isolator, Danfoss, 15kW - 32A - 400V - IP55- H3
Product brochure:
http://nozebra.ipapercms.dk/Danfoss/DD/Global/Products/FC/HVAC/ProductBrochure/
pg 22/23 identifies the model
pg 24/25 shows the wiring diagram; I would assume that is up to use how to set-up the inverters and what relay to collect the fault signal.
7. EF301 – Serving the Dishwasher Area, Sheet 10
The label needs to identify him as ‘EF301 Dishwasher Area Extract’
The Mechanical Schedule mention this at page 138/343:
The drawings need to be updated to show the correct power consumption.
The fault signal is present on the drawings and listed as being connected to: Jace Controller No. 2, IO-16-No.2 First Part U1/UI1:
However the Points list show another device.
This needs to be revised.
The MCC cable schedule also confirms that we must power EF301:
Since there is no mention of the EF301 in the specifications then we must assume that we not only power it but also control via On/Off.
We are supplying power and the way to control it is either applying Power or not, but for this we need to allocate an output and to revise the drawings and points list.
We have found that this is a DOL starter and the drawings need to be revised accordingly.
Since this is a DOL starter we require to have ‘Run’ and ‘Fault’ lamps as well as Hand/Off/Auto switches.
Attached is the technical literature: 155263-f.pdf at page 8/14
8. DCU101 - First Floor IT/AV Room Downflow Unit
THIS UNIT WAS REMOVED IN THE MECHANICAL SCHEDULE AMMENDMENT REVISION E at pg 2/8:
The Specs initially mentioned it at pg 121/137:
The mechanical Schedule initially mentioned it at page 179/343:
9. RFI 90 and 96 are asking about the threshold for the High Duct Static Pressure Switch limit.
This is detailed in the spec for both AHU’s and is 500Pa.
The Drawings need to be revised at Sheet 17 AHU301 High Supply Air Pressure Switch Manual Reset Type PA-930-85 needs to be checked for the correct pressure threshold.
The Drawings need to be revised at Sheet 20 AHU302 High Supply Air Pressure Switch Manual Reset Type TBA needs to be checked for the correct pressure threshold.
10. RFI90 Advises of a Panel filter at 150Pa
The Drawings need to be revised at Sheet 20 AHU302 Panel Filter Pressure Switch Manual Reset Type PA-930-80 needs to be checked for the correct pressure threshold.
11. The valves and actuators are Danfoss and this needs to be shown on the drawings and on the points list; Rory provided the updated schedule of valves and actuators.
12. I did not have time to check the wiring of sensors; this is something that panel manufacturers tend not to check in detail and I would kindly ask to check this against the type of sensors we will use; I apologise if this has already been done.
13. General Humidifier comments:
I have confirmation from the manufacturer (Js Humidifiers) that we would only get a common fault signal.
Please remove the High/Low humidity alarms both from the panel design and the Jace Points List (Sheet 28)
The panel drawings show the HOA for the humidifier but this is not actually connected to affect its operation.
Please change HOA to ‘Off/Auto’ and this should be interlocked with all the safety interlocks.
The Faulty lamp that is shown needs to be connected with the signal coming back from the humidifier.
The Run lamp needs to be changed to a ‘Healthy’ lamp and show green when all the safety interlocks are healthy to show that the humidifier is ready to run.
If the Fault signal is enabled then this should be interlocked with the above ‘Healthy’ lamp and switch it off.
The High Humidity switch must be interlocked with the Fan DP switch and linked back to the Safety Interlock Input.
We will have another software interlock to switch off the 0-10V humidifier demand should for example the humidity probe go out of limits or above certain threshold.
Attached is the technical literature: Neptronic SKE Manual.pdf
The above are general comments that should apply to all humidifiers in all other panels.
14. General Inverter comments:
Product brochure:
http://nozebra.ipapercms.dk/Danfoss/DD/Global/Products/FC/HVAC/ProductBrochure/
pg 22/23 identifies the model
pg 24/25 shows the wiring diagram; I would assume that is up to use how to set-up the inverters and what relay to collect the fault signal.
Since we are modulating the inverter speeds we need a way to let the inverters be independent in ‘Hand’ mode; for this we need to ‘read’ the ‘Hand’ position and have a separate set of wires going to the inverter and program it to know that is in Hand position so the speed reference can be set from the Keypad.
The safety interlock needs to be changed so that the Hand Position does not override the safety interlocks; a possible solution in the image on the right.
The above are general comments that should apply to all inverters in all other panels.
15. The Fire Initiation Panel needs to have only the ‘Off’ and ‘Extract Only’ positions and we need to read the Extract only position and bring this back into the controller.
The Panel Drawings need to be changed, as well as the points list and the software to raise an alarm when this is into Extract Only position.
The ‘Off’ position should be relabelled as ‘Normal’.
Please note that the Extract Only should also turn on the EF301.
The above are general comments that should apply to all Fire Initiation Panels.
The AHU 302 is not interlocked with the fire alarm nor with the Fireman’s Switch or with the three emergency stop buttons. This needs to be revised on the drawings at Sheet 21 to mimic Sheet 18 where they are done correctly; please note that the Off position of the Fireman’s switch is now gone.
16. The same cable reference has been used for the switched side of MCB’s 3,4,5
17. Cubicle terminals for connection cables to control section should be numbered
18. Field equipment terminal number connections to be completed.