Lennox Hearth MPD35ST-NM-B Indoor Fireplace User Manual


 
26
NOTE: DIAGRAMS & ILLUSTRATIONS ARE NOT TO SCALE.
Step 5. FIELD WIRING
TP-TH
TP
TH
APPLIANCE- MOUNTED
ON/OFF SWITCH
(OPTIONAL)
BK/W(1)
BK/W(1)
WALL-MOUNTED ON/OFF SWITCH (OPTIONAL)
THERMOSTAT (OPTIONAL)
JUNCTION BOX
BLACK
W
GR
120 V
AC
WALL MOUNTED CONFIGURATION FOR FAN SWITCH (OPTIONAL)
BK
R
WIRING DIAGRAM MILLIVOLT GAS VALVES
THERMOPILE
GAS VALVE
FAN
(OPTIONAL)
Figure 45
Refer to Section A for millivolt appliances and
Section B for electronic appliances. The gas
valve is set in place and pre-wired at the factory
on both models.
A. Millivolt Wiring (See Figure 45)
1. Install and wire in the burner control switch.
Install either "a" or "b" below, NOT BOTH
(installing both may result in improper burner
operation).
a. Standard OFF/ON Switch - Install the OFF/ON
burner control switch (rocker switch) as shown
in Figures 45, 46 and 49.
b. Optional Control Switch (OFF/ON wall
switch, wall thermostat or remote control
receiver). Install snap bushing (provided in
Electrical Outlet Kit) into control switch knock-
out in side panel (see Figures 13, 14 and 48).
Wire the optional control switch within the
millivolt control circuit (as shown in Figure 45)
using the 15 feet of 2 conductor wire supplied
(route wires through the snap bushing to the
optional control switch). Mount the optional
control switch or wall thermostat in a convenient
location on a wall near the fireplace.
CAUTION
Ground supply lead must be con-
nected to the wire attached to the
green ground screw located on the
outlet box. See
Figures 46 & 47. Fail-
ure to do so will result in a potential
safety hazard. The appliance must be
electrically grounded in accordance
with local codes or, in the absence of
local codes, the National Electrical
Code, ANSI/NFPA 70-latest edition.
(In Canada, the current CSA C22-1
Canadian Electrical Code).
CAUTION: Label all wires prior to disconnec-
tion when servicing controls. Wiring errors can
cause improper and dangerous operation.
ATTENTION: Au moment de l'entretien des
commandes, étiquetez tous les fils avant de
les débrancher. Des erreurs de cáblage peu-
vent entraîner un fonctionnement inadéquat
et dangereux.
Verify proper operation after servicing.
S'assurer que l'appareil fonctionne adé-
quatement une fois l'entretien terminé.
CAUTION
Do not connect optinal control switch
to 120VAC power supply.
2. Install the junction box and receptacle outlet
to the left of the valve in the front (for optional
blower kit). See junction box and receptacle
outlet as explained in steps 1-11 for (B) Elec-
tronic Wiring (on this page).
B. Electronic Wiring (See Figure 49)
Note: The electronic appliance must be con-
nected to the main 120 VAC power supply.
1. Locate the Electrical Outlet Kit provided
(packaged in firebox - contents: junction box, 2
screws, receptacle outlet, OFF/ON rocker switch
-for millivolt units only, and a snap bushing).
Note: The junction box can be installed in any of
the 4 outside corners of the control compartment
(outlet installed in front left corner is shown in
Figure 48 ). If an optional blower is to be installed
place the junction box to the left of the valve in
the front corner.
2. Route a 3-wire, 120 VAC, 60 Hz, 1 ph power
supply to the location on appliance where junc-
tion box is to be installed.
3. Open the control compartment access
panel.
4. Wire and install the outlet receptacle to junc-
tion box, then install into the chosen corner of
the control compartment as shown in Figures
46, 47 and 49.
5. After the receptacle/junction box wiring is
complete, install the field-provided metal junc-
tion box cover plate (see Figure 48).
6. Install the snap bushing (provided in kit) into
the selected cabinet knockout opening in side
cabinets (see Figures 13, 14 and 48). The snap
bushing provides protection for the wires (see
note below) passing through side cabinet going
to an optional burner control switch Wire in the
burner control switch to the low voltage circuit
as shown in Figure 49.
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 con-
ductor placed loose on top of the appliance.
Gas
Valve
Control Compartment
Access panel
OFF/ON
Switch
TP TH
TH
OFF/ON
Switch
Connect
wires to
terminals
4. Press the OFF/ON switch into bracket as
shown below (it will snap into place).
Figure 46
Install OFF/ON Switch
(millivolt models)
1. Connect the 2 wires (provided in Electrical
Outlet Kit) to the TP/TH and TH terminals
on valve.
2. Pass the 2 wires through the opening where
OFF/ON switch will be installed (left of piezo,
below valve).
3. Connect the two wires to the OFF/ON
Switch.