8
L
L
L
L
L
O C
O C
O C
O C
O CA
A
A
A
AT I O N
T I O N
T I O N
T I O N
T I O N
R
R
R
R
R
E Q U I R E M E N T
E Q U I R E M E N T
E Q U I R E M E N T
E Q U I R E M E N T
E Q U I R E M E N TS
S
S
S
S
A N D
A N D
A N D
A N D
A N D
C
C
C
C
C
O N S I D E R
O N S I D E R
O N S I D E R
O N S I D E R
O N S I D E RA
A
A
A
AT I O N S
T I O N S
T I O N S
T I O N S
T I O N S
H
H
H
H
H
ORIZONTAL
ORIZONTAL
ORIZONTAL
ORIZONTAL
ORIZONTAL
I
I I
I I
NSTALLATION
NSTALLATION
NSTALLATION
NSTALLATION
NSTALLATION
(*MVC8 M
(*MVC8 M
(*MVC8 M
(*MVC8 M
(*MVC8 M
ODELS
ODELS
ODELS
ODELS
ODELS
O
O
O
O
O
NLY
NLY
NLY
NLY
NLY
)))))
Line contact to framing is permitted when installed in the horizon-
tal configuration. Line contact is defined as the portion of the cabi-
net that is formed by the intersection of the top and side. ACCES-
SIBILITY CLEARANCE, WHERE GREATER, SHOULD TAKE PRECEDENCE
OVER MINIMUM FIRE PROTECTION CLEARANCE. A gas-fired fur-
nace for installation in a residential garage must be installed so that
the ignition source and burners are located not less than eighteen
inches (18") above the floor and is protected or located to prevent
physical damage by vehicles. A gas furnace must not be installed
directly on carpeting, tile, or other combustible materials other
than wood flooring.
F
FF
F
F
URNACE
URNACE
URNACE
URNACE
URNACE
S
S
S
S
S
USPENSION
USPENSION
USPENSION
USPENSION
USPENSION
If suspending the furnace from rafters or joist, use 3/8" threaded
rod and 2”x2”x3/8” angle iron as shown below. The length of rod
will depend on the application and the clearances necessary.
Suspended Furnace
E
EE
E
E
XISTING
XISTING
XISTING
XISTING
XISTING
F
F
F
F
F
URNACE
URNACE
URNACE
URNACE
URNACE
R
R
R
R
R
EMOVAL
EMOVAL
EMOVAL
EMOVAL
EMOVAL
NOTE:
NOTE:
NOTE:
NOTE:
NOTE: When an existing furnace is removed from a venting system
serving other appliances, the venting system may be too large to
properly vent the remaining attached appliances.
The following vent testing procedure is reproduced from the Ameri-
Ameri-
Ameri-
Ameri-
Ameri-
can National Standard/National Standard of Canada for Gas-
can National Standard/National Standard of Canada for Gas-
can National Standard/National Standard of Canada for Gas-
can National Standard/National Standard of Canada for Gas-
can National Standard/National Standard of Canada for Gas-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
Fired Central Furnaces ANSI Z21.47-Latest Edition, CSA-2.3-
La
La
La
La
Latttttest E
est E
est E
est E
est Edition S
dition S
dition S
dition S
dition Sec
ec
ec
ec
ection 1.23.1.
tion 1.23.1.
tion 1.23.1.
tion 1.23.1.
tion 1.23.1. The following steps shall be fol-
lowed with each appliance connected to the venting system placed
in operation, while any other appliances connected to the venting
system are not in operation:
a.
Seal any unused openings in the venting system;
b.
Inspect the venting system for proper size and horizontal
pitch, as required by the National Fuel Gas Code, ANSI
Z223.1 or the CAN/CSA B149 Installation Codes and these
instructions. Determine that there is no blockage or
restriction, leakage, corrosion and other deficiencies which
could cause an unsafe condition;
c.
In so far as practical, close all building doors and windows
and all doors between the space in which the appliance(s)
connected to the venting system are located and other
spaces of the building. Turn on clothes dryers and any
•
For counterflow installations, the air conditioning coil must
be downstream from the heat exchanger of the furnace.
•
Counterflow installation over a noncombustible floor.
Before setting the furnace over the plenum opening,
ensure the surface around the opening is smooth and level.
A tight seal should be made between the furnace base
and floor by using a silicon rubber caulking compound or
cement grout.
•
Counterflow installation over a combustible floor. If
installation over a combustible floor becomes necessary,
use an accessory subbase (see Specification Sheet
applicable to your model for details). A special accessory
subbase must be used for upright counterflow unit
installations over any combustible material including wood.
Follow the instructions with the subbase for proper
installations. Do not install the furnace directly on carpeting,
tile, or other combustible material other than wood
flooring. (NO
NO
NO
NO
NOTE
TE
TE
TE
TE: The subbase will not be required if an air
conditioning coil is installed between the supply air
opening on the furnace and the floor.
Top - 1"
Side
Clearance - 1"
Back - 0"
Front Clearance - 3"
Vent Pipe Clearance to Combustibles-
6" using Single Wall Connector or 1"
using B-1 vent.
•
Adequate combustion/ventilation air must be supplied to
the closet.
•
Furnace must be completely
completely
completely
completely
completely sealed to floor or base.
Combustion/ ventilation air supply pipes must terminate
12" from top of closet and 12" from floor of closet. DO
NOT remove solid base plate for side return.
•
Return air ducts must be completely
completely
completely
completely
completely sealed to the furnace
and terminate outside the enclosure surfaces.
C
C
C
C
C
LEARANCES
LEARANCES
LEARANCES
LEARANCES
LEARANCES
AND
AND
AND
AND
AND
A
A
A
A
A
CCESSIBILITY
CCESSIBILITY
CCESSIBILITY
CCESSIBILITY
CCESSIBILITY
Unobstructed front clearance of 24" for servicing
for servicing
for servicing
for servicing
for servicing is recommended.
T O P
B1-V EN T
SIN G LE
(P LEN U M )
1"
6"
1"
3"
0"
1"
VE N T
SID ES
FR O N T
B AC K
Top clearance for horizontal configuration - 1"
