Condair Nortec GS 50, Operation And Maintenance Manual

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89 Appendix-A Nortec GS
2583701_C_EN_1812_Nortec-GS_OM
Table A1: Nortec GS Standard Torque Values
Figure A1
Item
Number
Fastener and Location Quantity
Anti-Seize
Lubricant*
Torque Re-torque
1
Bolt, M6×12, flange-head,
stainless steel – secondary
heat-exchanger/exhaust flange
bolts
4
per flange
– 15 in·lb (1.7 N·m) 15 in·lb (1.7 N·m)
2
Stud, M6×30 and serrated
flange nut (replace the M6x16
bolts in older units) – primary
heat-exchanger bottom flange
bolts
4
per heat-
exchanger

Tighten until metal to
metal contact occurs.
DO NOT EXCEED
130 in·lb (14.7 N·m)
DO NOT EXCEED
130 in·lb (14.7 N·m)
3
Bolt, M6×12, hex-head, stain -
less steel – drain fitting flange
bolts
4
per unit

30 in·lb (3.5 N·m)
Do not Re-Torque
(Inside tank)
4
Bolt, M8× 25 , hex-head, stain -
less steel – tank cover side and
bottom bolts
8-10
per door

20 in·lb (2.3 N·m)
then secure jam nut
10 in·lb (1.2 N·m)
5
Bolt, M8× 25 , hex-head, stain -
less steel – tank cover top bolt
1-3
per door

10 in·lb (1.2 N·m)
then secure jam nut
10 in·lb (1.2 N·m)
6
Bolt, M6× 40 , hex-head, stain -
less steel – tank cover top
bracket bolt
1-3
per door

35 in·lb (3.9 N·m) 35 in·lb (3.9 N·m)
7
Bolt, M6×14, hex-head, stain -
less steel – burner flange bolts
9
per burner

4 in·lb (0.5 N·m) 4 in·lb (0.5 N·m)
8
Bolt, M6×10, socket-head,
stainless steel – primary heat-
exchanger top flange bolts
14
per heat-
exchanger

110 in·lb (12.4 N·m) 110 in·lb (12.4 N·m)
9
Nut, M5, hex-head, galvanized
steel – blower tube
4
per burner
– 10 in·lb (1.2 N·m) 10 in·lb (1.2 N·m)
10
Bolt, M5×16, hex-head, galva -
nized steel – blower tube
4
per blower
– 10 in·lb (1.2 N·m) 10 in·lb (1.2 N·m)
* Apply nickel anti-seize lubricant (Loctite ® LB 771™ or equivalent) to fastener.
A.1.1 Torque Sequences
9
10
11
12
7
8
1
2
M6x40 M8x25
M8x25
M8x25
M8x25 M8x25
M8x25
M8x25
14
15
M8x25
M8x25
13
16
M8x25
M8x25
3
4
M6x40
M8x25
5
6
M6x40
M8x25
17
M8x25
18
M8x25
12
M8x25
2
M8x25
1
M6x40
7
M8x25
10
M8x25
9
M8x25
8
M8x25
3
M8x25
6
M8x25
5
M8x25
4
M8x25
11
M8x25
Figure A2: Tank Cleanout Door Torque Sequence. Small and large doors shown.