Dear Mr.Takakura,
As above mentioned we apologize for take time to reply to you.
I would like to report for the two items as attached file.
Regarding battery back-up for HV. SWGR has required by owner’s bidding document however it
was lost in our BOQ. During the construction we was discussed with Mr.Wanchai and recommended use small UPS
however it not decided the type of back up system yet by owner. One of Mr.Wanchai’s idea use seal lead acid battery,
but the SWGR control circuit is AC line therefore it must be modified for DC line circuit in case of back up by seal lead
acid battery and replacement & maintenance cost higher than small UPS.
For air flow signal cable connection we must apologize that not connection be occurred by our wrong communication, we will check
condition at site on this week end (Sat)21st ,(Sun)22nd Jun. and will connect it urgently.