tender for maintenance of electrical works at shilpa sadan - amc of air conditioning machines.; 1 comprehensive, preventive and corrective maintenance of room air-conditioner machines at different location of shilpa sadan, kolkata for the following capacity. 2 (a) split type 1.0 tr. air-conditioner machine. quantity: 37 nos. x 12 months = 444 units. 3 (b) split type 1.5 tr. air-conditioner machine. quantity: 52 nos. x 12 months = 624 units. 4 (c) split type 2.0 tr. air-conditioner machine. quantity: 19 nos. x 12 months = 228 units. 5 (d) split type 3.0 tr. air-conditioner machine. quantity: 2 nos. x 12 months = 24 units. 6 (e) window type 1.5 tr. air-conditioner machine. quantity: 6 nos. x 12 months = 72 units. 7 (f) window type 2.0 tr. air-conditioner machine. quantity: 1 no. x 12 months = 12 units. 8 (g) cassete type 2.0 tr. air-conditioner machine. quantity: 9 nos. x 12 months = 108 units. 9 (h) cassete type 3.0 tr. air-conditioner machine. quantity: 3 nos. x 12 months = 36 units. 10 (i) cassete type 3.5 tr. air-conditioner machine. quantity: 6 nos. x 12 months = 72 units. 11 (j) cassete type 4.0 tr. air-conditioner machine. quantity: 3 nos. x 12 months = 36 units. 12 (k) vrf unit of 18 hp quantity: 1 no. x 12 months = 12 units. 13 (l) vrf unit of 20 hp. quantity: 1 no. x 12 months = 12 units. 14 (o) ductable 8.5 tr. air-conditioner machine. quantity: 8 nos. x 12 months = 96 units. 15 annual routine and preventive maintenance and upkeeping of the installed ac machines including minor repairing from 10 a.m. to 6 p.m. at shilpa sadan, kolkata by engaging 1 semi-skilled technician and 1 no. unskilled helper) 16 (a) semi-skilled a.c. technician. quantity: 1 no. x 12 months = 12 units. 17 (b) un-skilled helper. quantity: 1 no. x 12 months = 12 units.