S
ERIES
2000 I
NSTALLATION
, O
PERATION
AND
S
ERVICE
M
ANUAL
6
3.2 Pur
g
e of Supply Duct
If this heating
u
nit is to be installed indoors, and its
o
u
tdoor air s
u
pply d
u
cted from o
u
tdoors, ANSI
Standards Z83.4/CSA 3.7, Z83.18 and Z83.25/CSA
3.19 req
u
ire that all s
u
pply d
u
ct shall be p
u
rged a
minim
u
m of fo
u
r times prior to any ignition attempt. If
the
v
ol
u
me of the o
u
tdoor air s
u
pply d
u
ct exceeds
the heating
u
nit’s ability to complete the req
u
ired fo
u
r
air changes prior to ignition, yo
u
m
u
st contact the
factory to p
u
rchase an extended p
u
rge card of the
appropriate d
u
ration to meet this req
u
irement.
3.3 Hardware
Unless other
w
ise specified, all hard
w
are m
u
st be
torq
u
ed to settings on
Page 6, Table 1
.
Note:
Inlet hood opening shall not be installed
w
ith
inlet opening facing into the pre
v
ailing
w
ind direction
in order to help pre
v
ent the possibility of moist
u
re
entrainment.
Table 1: Recommended Tor
q
ue Settin
g
s
Bolt Head
Grade Markin
g
Nut Grade
Markin
g
Bolt Size
Grade 2
Grade 5
10-24
27 in•lb
42 in•lb
1/4-20
65 in•lb
101 in•lb
5/16-18
11 ft•lb
17 ft•lb
3/8-16
19 ft•lb
30 ft•lb
Bolt Head
Grade Markin
g
Nut Grade
Markin
g
Bolt Size
Grade
8
.
8
Grade 10.9
M5
6Nm
9Nm
M6
10Nm
15Nm
M8
25Nm
35Nm
M10
50Nm
75Nm
M12
85Nm
130Nm
M16
215Nm
315Nm
8.8
10.9
8.8
10.9
