Step 6. Connecting Gas Line - Lennox MPB3328CNM-B Installation Instructions Manual

Merit plus series mpb b-vent gas fireplaces
Hide thumbs Also See for MPB3328CNM-B:
Table of Contents

Advertisement

2. If the factory-provided outlet/junction box at
the right rear of the fireplace is being used,
remove the outlet box from the junction box
by removing two screws.
3. Connect the power supply wires (includ-
ing the ground supply wire) as shown in
Figures 17 and 18. (If the field-provided
J-box/outlet box is being used, all of the
outlet box wiring must be field-provided).
4. Locate and install a low voltage (24V)
wall-mounted switch or thermostat (both
field-provided) in the desired location.
5. Connect the low voltage wire, located in
the lower control compartment, to the wall-
mounted switch or thermostat.
Note: The supplied 15 feet of 2 conductor wire
has one end of each conductor connected
to the gas valve circuit and the other end of
each conductor placed inside the control
compartment.
6. Insert the control circuit plug into the un-
switched receptacle of the outlet box.
7. After wiring is complete, mount the outlet
box to the J-Box.
Note: The gas valve-mounted ON/OFF switch
is shown in Figures 17 and 18. It is integral
with the gas valve and should be set to the
ON position.
Step. 5 WIRING - OpTIONAL FORCEd
AIR bLOWER KIT
FbK-100, FbK-200 and FbK250 Kits
(See Figure 17 for FBK-100, FBK-200 and
Figure 18 for FBK-250 wiring) -
An electrical outlet box (receptacle) is factory
-provided for the installation of the FbK-100,
FbK-200 and FbK-250 forced air blower kits.
(An optional field-provided outletbox/J-Box
may also be used. Electrical power must be
connected to either of these receptacles in order
to operate these blowers. Install the blower
kits according to the installation instructions
provided with the kits.
Note: The tab connecting the receptacles of
the outlet box must be broken in FBK-100 and
FBK-200 blower kit applications. See Figure
16 on page 13.
14
Electronic Wiring Diagram (Honeywell)
Showing the Blower Wiring for the Optional
FBK-100 and FBK-200 Kits
1. If any of the original wire as supplied must be replaced,
1.
it must be replaced with Type AWM 105°C – 18 GA. wire.
2. 120V, 60Hz – Less than 3 amps.
**Leave the ON/OFF switch, which is integral
with the gas valve, in the ON position.
**ON/OFF Switch (Integral
with Gas Valve)
*OPTIONAL
Gas Valve
ACCESSORY
SWITCH
PILOT
ASSEMBLY
BK
Outlet Box
Green Ground
R
Screw
BL
OPT
Red
BLOWER
G
pigtail
Break Off
Black
Tab
pigtail
Junction Box
W
B
G
Hot side of Outlet
BL
R
W
BK
BK
LIMIT SWITCH
OPTIONAL WALL SWITCH
OR OPTIONAL THERMOSTAT OR
OPTIONAL REMOTE RECEIVER
*Blower speed control switch is provided in FBK200 blower kit.
Factory Wired
Schematic Representation Only
Figure 17
Electronic Wiring diagram (Honeywell)
Showing the blower Wiring for the Optional
FbK-250 Kits
1. If any of the original wire as supplied must be replaced,
1.
it must be replaced with Type AWm 105°C – 18 GA. wire.
2. 120V, 60Hz – Less than 3 amps.
*Leave the ON/OFF switch, which is integral
with the gas valve, in the ON position.
*ON/OFF Switch (Integral
with Gas Valve)
Outlet box Green
Ground Screw
Gas Valve
pILOT
ASSEmbLY
bK
Optional FbK-250
R
module
bL
OpT
bLOWER
W
b
G
Hot side of Outlet
bL
R
W
bK
bK
LImIT SWITCH
OpTIONAL ON/OFF SWITCH,
WALL SWITCH, THERmOSTAT
OR REmOTE CONTROL RECEIVER
Factory Wired
Schematic Representation Only
Figure 18
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.

Step 6. CONNECTING GAS LINE

All codes require a shut-off valve mounted
in the supply line. The orientation of the
shut-off valve should face the front. Figure
20 illustrates two methods for connecting the
gas supply. A Sediment Trap is recommended
to prevent moisture and debris in gas line from
damaging the valve.
The flex-line method is acceptable in the U.S.A.
BK
120
where local codes permit, however, Canadian
W
VAC.
G
requirements vary depending on locality. Instal-
lation must be in compliance with local codes.
These appliances are equipped with a gas flex-
line for use in connecting the unit to the gas line.
See Figure 20 for flex-line description. The
flex-line is rated for both natural and propane
White Wire
gas. A manual shut off valve is also provided
to Opposite
Side
with the flex-line.
Transf.
120 V.
The gas control valve is located in the lower
control compartment.
24 V
To access the valve open the lower control
compartment door (see Figure 19).
BK
The millivolt control valve has a 3/8" (10 mm)
NPT thread inlet port. The electronic control
valve has a 1/2" (13 mm) NPT thread inlet
port and is fitted with a 1/2" x 3/8" (13 mm x
Field Wired
10 mm) NPT fitting.
Open the lower panel or louver assembly by
pushing in the right side of the panel or louver
assembly and then lowering it forward and
Control
Valve
G
120
bK
VAC.
W
OpENING CONTROL
COmpARTmENT dOOR
Figure 19
White Wire
To Opposite
Side
Junction box
Secure all joints tightly using appropriate
Transf.
tools and sealing compounds (ensure propane
120 V.
resistant compounds are used in propane ap-
plications). It is recommended to seal around
24 V
the gas line to prevent cold air leakage.
Acquire the shut-off valve and gas lex line and
bK
pull the assembly forward out of the compart-
ment. Separate the shut-off valve from the gas
flex-line. Determine the length of pipe needed
to route the gas line from the last fitting (shown
in Figure 20 on Page 15) to a point within the
Field Wired
control compartment that will allow the shut-
off valve to be easily attached by hand to the
gas flex-line.
down.
Lower Control
Compartment
door

Advertisement

Table of Contents
loading

Table of Contents