Optional Side Wall Venting; Oil Tank; Piping Installation; Electrical Connections - ECR International WML-C Operation And Maintenance Manual

OPTIONAL SIDE WALL VENTING

Certain WML-C AND MPL-B furnace
models are manufactured to be installed
as sidewall vented units. Please refer to
Direct Venting Instructions, P/N 28888
included with the Vent Kit for details.
Sidewall Venting (Direct
requires the use of specific oil burners;
the Beckett AFII, or the Riello 40BF.
Please refer to Appendix A, Tables A2,
and A4.
Note: Sidewall venting requires special
attention to combustion air supply. There
is no natural draft in the venting system
between furnace cycles; therefore, if the
indoor pressure is negative relative to
the outdoors, the vent terminal becomes
a point of infiltration. This could lead to
oil odour control problems. This problem
is rectified by the use of ducted outdoor
air for combustion
combustion), using the Beckett AFII or
Riello 40BF oil burner. See Direct Vent
Instructions supplied with the Vent Kits.
Table 3: Minimum Chimney Base
Temperatures (°F)
Chimney Height (ft.)
Nozzle
11 20
Chimney Thermal Resistance < R6
0.50 300 400
0.65 275 340
0.70 270 330
0.75 260 320
0.85 250 300
1.00 225 300
Chimney Height (ft.)
Nozzle
11 20
Chimney Thermal Resistance > R6
0.50 185 200
0.65 175 185
0.70 175 185
0.75 175 185
0.85 165 185
1.00 165 185
< - , > -
less than greater than

OIL TANK

Oil storage tanks must be selected and
installed in compliance with applicable
codes; in the United States, NFPA 31,
Standard for the Installation of Oil
Burning Equipment, Chapter 2. and in
Canada, CAN/CSA-B139,
Code for Oil Burning Equipment, Section
6. Observe all local codes and by-laws.
In general, the oil tank must be properly
supported and remain stable in both
empty and full condition. The oil tank
must be fitted with vent and supply pipes
to the outdoors. Refer to the above-
mentioned codes for sizing. The vent
pipe must be no less than 1¼ inches
Venting)
I.P.S., and terminate with an appropriate
vent cap in a location where it will not be
blocked. The fill pipe must be no less
than 2 inches I.P.S., and terminate with
an appropriate cap in a location where
debris will not enter the fill pipe during oil
delivery.
If located indoors, the tank should
normally be in the lowest level, (cellar,
basement, etc.). It must be equipped
with a shut-off valve at the tank outlet
used for the oil supply. The oil tank must
be located as to not block the furnace /
room exit
(semi-sealed
clearances
mentioned codes.

PIPING INSTALLATION

In the United States, NFPA 31, Standard
for the
Equipment, Chapter 2.
In Canada, the entire fuel system should
28 36
be installed in accordance with the
requirements of CAN/CSA B139, and
local regulations. Use only approved fuel
535 725
oil tanks piping, fittings and oil filters.
430 535
Ensure that all fittings used in a copper
405 505
oil line system are high quality flare
fittings. Do not use compression fittings.
380 475
Do not use Teflon tape on any fittings.
355 430
365 430 Pressurized or gravity feed installations
must not exceed 3 PSIG. Pressures
greater than 10 PSIG may cause
28 36
damage to the shaft seal. If the height of
the oil stored in a tank above the oil
burner exceeds 11½ feet, it may be
220 250
necessary to use a pressure-regulating
device approved for this purpose.
205 220
195 215 The furnace may be installed with a one-
pipe system with gravity feed or lift. The
195 210
maximum allowable lift on a single line
195 205
system is 8 feet. Lift should be measured
from the bottom (outlet) of the tank, to
195 205
the inlet of the burner. Sizing a single
line system is complex because of the
difficulty estimating the pressure drop
through
component in the line. In general, keep
single line systems short as possible.
The following chart shows the allowable
line lengths (horizontal + vertical) for
single and two-line oil piping systems. All
distances are in feet.
Installation
pathway. Observe
specified in the above-
Installation of Oil Burning
each fitting, bend
7
Table 4: Oil Lines
Copper Tubing Oil Line Length (Feet)
Single-Pipe OD
Lift
(Feet)
3/8" 1/2"
0 53 100
1 49 100
2 45 100
3 41 100
4 37 100
5 33 100
6 29 100
7 25
8 21
9 17
10 13
12 - - - - - -
all
14 - - - - - -
16 - - - - - -
18 - - - - - -
In retrofit applications, where an existing
oil line system is in place, a vacuum
check will help determine the efficacy of
the existing oil line system The vacuum
in a system should not exceed 6" Hg. for
a single pipe system, nor 12" Hg. for a
two-pipe system.
NOTE: The oil burner requires the use of
a bypass plug when converting from
single-pipe to two-pipe
systems. See burner manufacturer's
instructions.
All fuel systems should include an oil
filter between the fuel oil storage tank
and the oil burner. For best results,
install the oil filter as close to the burner
as possible. When using an indoor oil
tank, the oil filter may be installed at the
tank downstream from the shut-off valve.
If firing the furnace under the 0.65 gph
rate, a 7 to 10 micron line filter should be
installed as close to the oil burner as
possible.

ELECTRICAL CONNECTIONS

The furnace is listed by the Canadian
Standards Association
factory wired and requires minimal field
wiring. In the United States, the wiring
must be in accordance with the National
and
Fire Protection Association NFPA-70,
National Electrical Code, and with local
codes and regulations. In Canada, all
field wiring should conform to CAN/CSA
C22.1 Canadian Electrical Code, Part 1,
and by local codes, where they prevail.
The furnace should be wired to a
separate and dedicated circuit in the
30318 R4 9/9/2005
Two-Pipe OD
3/8" 1/2"
68 100
65 100
63 100
60 100
58 100
55 100
53 100
99 50 100
83 48 100
68 45 100
52 42 100
37 100
32 100
27 100
22 88
oil piping
(CSA). It is