Installation
900285-01 08/2016
Innovative Hearth Products
Gemini™ and GeminiCD Series Direct-Vent Gas Fireplaces
40
Figure 32 - Junction Box Wiring, 120 V, 60 hz, 1 phase
Figure 33 - 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
BLACK
W
GR
120 V
AC
WALL MOUNTED CONFIGURATION FOR FAN SWITCH (OPTIONAL)
BK
R
THERMOPILE
GAS VALVE
FAN
(OPTIONAL)
13.
Connect the Gas Line
All codes require a shutoff valve mounted in the supply line.
Figure 35
illustrates two methods for connecting the
gas supply. The fl ex-line method is acceptable in the U.S., however, Canadian requirements vary depending on
locality. Installation must be in compliance with local codes.
NOTE:
Ensure the CPI/IPI switch is set to intermittent mode with the pilot in the OFF position. See control
compartment door label for more information.
NOTE:
A sediment trap is recommended in the gas piping within the home to prevent moisture and debris in the line
from damaging the valve.
NOTE:
Secure all joints tightly using appropriate tools and sealing compounds (ensure propane resistant compounds
are used in propane applications). Seal around the gas line to prevent cold air leakage. Gas line holes and other
openings can be caulked or stuffed with unfaced fi berglass insulation.
Figure 34 - Control Compartment
Figure 35 - Gas Line Connection
(Optional) fl exible gas
line connector
Gas
valve
3/8” Nipple
3/8” Union
3/8” Close nipple
3/8” Shutoff valve
3/8 NPT x 3/8”
Flare fi tting
1/2 x 3/8” Flare
shutoff valve
3/8” Flex tubing
Gas
stub
1/2 x 3/8”
Reducer
Main gas shutoff
valve
Gas valve
Optional burner ON/OFF switch (millivolt units)
CPI/IPI switch (electronic units)
Piezo
(millivolt units)
Door latch
These fi replaces are equipped with a gas fl ex line for use (where permitted) in connecting the unit to the gas line. A
gas fl ex line is provided to aid in attaching the direct-vent fi replace to the gas supply. The gas fl ex line can only be
used where local codes permit. The fl ex line is rated for both natural and propane gas. A manual shut off valve is also
provided with the fl ex line.
The gas control valve is located in the lower control compartment
(
Figure 34
).
Access the Control Compartment
See
Page 53
for instructions on
Accessing the Control Compartment
.
Millivolt and electronic control valves have a 3/8” (10 mm) NPT thread inlet port.