Installation
900912-00C, 04/2019
Innovative Hearth Products
Gemini™ -C Series Direct-Vent Gas Fireplaces
39
Millivolt Wiring
Millivolt units are not provided with factory-installed controls; therefore, one of the optional control switches is
required to operate the unit (
Page 69
):
• ON/OFF Wall Switch,
• Unit-Mountable ON/OFF Switch *,
• Thermostat, or
• Remote Control.
See the Operation section on
Page 50
for more details.
1. If installing an ON/OFF wall switch or thermostat, mount it in a convenient location on a wall near the fireplace.
2. Wire the control switch within the millivolt control circuit using the 15 ft of 2-conductor wire supplied with the
unit (
Figure 29A
).
NOTE: The supplied 15 ft of 2-conductor wire has one end of each conductor connected to the gas valve circuit and
the other end of each conductor placed loose inside the bottom compartment.
CAUTION
In millivolt systems, do NOT connect a wall switch to a 120 V power supply.
Figure 29B - Junction Box Wiring, 120 V, 60 hz, 1 phase
Figure 29A - Wiring Diagram—Millivolt Gas Valves
Ground: green Neutral: white 120 V
AC: black
Wall-mounted ON/
OFF blower switch
or variable speed
control switch
*
Junction
box
Tab
broken
Hot side of
receptacle
Neutral side
of receptacle
Green ground screw
Tab
intact
Field wired
Factory wired
Blower
Ground
Plug blower into
this receptacle
Red
Black
Green
White
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
BLAC
K
W
GR
120
V
AC
WALL MOUNTED CONFIGURATION FOR FAN SWITCH (OPTIONAL)
BK
R
THERMOPILE
GAS VALVE
FAN
(OPTIONAL)
f i r e - p a r t s . c o m