Astria Fireplaces GEMINI Instruction Sheet
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900922-02NC 1
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INSTALLATION INSTRUCTIONS FOR GAS CONVERSION KITS
FOR USE WITH DIRECT VENT GAS FIREPLACES
[MILLIVOLT MODELS GEMINI-C SERIES]
REQUIRED TOOLS AND SUPPLIES
5/32 Allen Wrench, Torx Bit (T20 with 1/4” shank and center hole)
or Flat Blade Screwdriver, 1/2” Open-End Wrench, 1/4” nut driver /
socket, and 4mm allen wrench
TURN OFF THE GAS SUPPLY TO THE APPLIANCE. DISCONNECT
ELECTRICAL POWER SUPPLY.
READ ALL THE STEPS BEFORE STARTING THE CONVERSION. IN-
STALLER NOTICE: THESE INSTRUCTIONS MUST BE LEFT WITH THE
APPLIANCE.
When installing gas components use pipe joint compound or
Teflon tape on all pipe fittings before installing (Do not use pipe
joint compounds on flare fittings).
NOTE: THE FIREPLACE MUST BE OFF AND COLD BEFORE PERFORM-
ING THE GAS CONVERSION.
ALL WARNINGS, PRECAUTIONS AND INSTRUCTIONS IN THE INSTAL-
LATION AND OPERATION MANUAL PROVIDED WITH THE APPLIANCE
APPLY TO THESE INSTRUCTIONS.
WARNING
This conversion kit shall be installed by a qualified
service agency in accordance with the manufac-
turer's instructions and all applicable codes and
requirements of the authority having jurisdiction. If
the information in these instructions is not followed
exactly, a fire, explosion or production of carbon
monoxide may result causing property damage,
personal injury or loss of life. The qualified service
agency performing this installation is responsible
for the proper installation of this kit and assumes
responsibility for this conversion. The installation
is not proper and complete until the operation of the
converted appliance is checked as specified in the
manufacturers instructions supplied with the kit. The
qualified service agency performing this installation
assumes responsibility for this conversion.
AVERTISSEMENT
Cet équipement de conversion sera installé par
une agence qualifiée de service conformément aux
instructions du fabricant et toutes exigences et codes
applicables de l'autorisés avoir la juridiction. Si
l'information dans cette instruction n'est pas suivie
exactement, un feu, explosion ou production de
protoxyde de carbone peut résulter le dommages
causer de propriété, perte ou blessure personnelle de
vie. L'agence qualifiée de service est esponsable de
l'installation propre de cet équipment. L'installation
n'est pas propre et compléte jusqu'à l'opération de
l'appareil converti est chéque suivant les critères
établis dans les instructions de propriétaire provi-
sionnées avec l'équipement.
MILLIVOLT GAS CONVERSION KITS
P/N 900922-02
Rev. NC 10/2018
HEARTH PRODUCTS
KITS AND ACCESSORIES
KIT COMPONENTS
Pilot Orifice, Burner Orifice, Proflame Hi/Low Gas Conversion Kit
(containing Pressure Regulator Assembly, two (2) screws, Gas
Conversion Identification Label, air shutter (For 40” models ONLY)
and Installation Instructions
GENERAL INFORMATION
Gas conversion kits are available to adapt the fireplace from the
use of one type of gas to the use of another. These kits contain all
the necessary components needed to complete the task including
labeling that must be affixed to ensure safe operation.
Millivolt Systems,Natural Gas To Propane Gas Conversion Kits
Cat. No. Model Fireplace Models
F3794 GCKGC35MVNP Gemini-C 35”
F3795 GCKGC40MVNP Gemini-C 40”
Table 1
Millivolt Systems, Propane Gas to Natural Gas Conversion Kits
Cat. No. Model Fireplace Models
F3791 GCKGC35MVPN Gemini-C 35”
F3792 GCKGC40MVPN Gemini-C 40”
Table 2
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IMPORTANT LE CANADA SEULEMENT
La conversion devra être effectuée conformément aux
recommandations des autorités provinciales ayant
juridiction et conformément aux exigences du code
d'installation CAN/CSA B149.1.
IMPORTANT CANADA
The conversion shall be carried out in accordance with
the requirements of the provincial authorities having
jurisdiction and in accordance with the requirements
of the CAN/CSA B149.1 Installation code.
INSTALLING GAS CONVERSION KITS
CAUTION
The gas supply shall be shut OFF prior to discon-
necting the electrical power, before proceeding with
the conversion.
ATTENTION
Avant d’effecteur la conversion, coupez d’abord
l’alimentation en gaz, ensuite, coupez l’alimentation
electrique.
1. TURN OFF THE GAS SUPPLY TO THE FIREPLACE and disconnect
power supply at the circuit breaker if applicable. Ensure fireplace is
cold.
2. Remove the facade, and glass door per instruction in the Installation
and Operation Manual.
3. Remove the logs per instruction in the Installation and Operation
Manual.
NOTE: Exercise care so as not to break the logs.
4. If applicable, remove ceramic or porcelain liner.
5. Remove the sub floor screws and subfloor.
Figure 2 - Valve Regulator Conversion (millivolt shown)
Pressure
Regulator
Remove
These
Components
Pressure
Regulator
Remove
these
components
Model Natural Gas
drill size *
Propane
drill size*
Gemini-C 35 #45, 39L66 (0.082”) 99K78 (0.048”)
Gemini-C 40 #43, 99K75 (0.089”) #54, 99K79 (0.055”)
* Standard size installed at factory
Table 3 - Burner Orifice Sizes, Elevation 0–4500 ft (0–1372 m)
Figure 1 - Burner Orifice
7. Rotate the burner to release the air shutter adjustment rod from the air
shutter lever. Set screws and burner aside for later reinstallation.
8. Refer to the instructions provided with the SIT Regulator Conversion
Kit, and Figure 2. Using a Torx T20 driver (with 1/4” shank) or
slotted screwdriver, remove and discard the three pressure regulator
mounting screws, pressure regulator tower, the diaphragm assembly
(if applicable) and the spring. Discard all removed components.
6. Remove Burner assembly and replace the main burner orifice supplied
in this kit (Figure 1). Use pipe joint compound or Teflon® tape on all
pipe fittings before installing.
NOTE: Ensure propane resistant compounds are used in propane
applications, do not use pipe joint compounds on flare fittings.
NOTE: See Table 3 for burner orifice sizes.
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IHP.us.com
Figure 3 - Millivolt Pilot
Pilot
Orifice
Pilot
Orifice
10. 40” and 45” models ONLY - Remove the air shutter adjustment
screw (Figure 4) and remove the air shutter (1/4” nut driver / socket)
from burner. Use air shutter rod from removed air shutter and place
on new shutter provided in this kit. Install new shutter assembly on
burner. Discard the removed air shutter.
11. Retrieve the burner and hold the venturi tube above the orifice. Place
the shutter adjusting rod in the slot of the shutter arm (Figure 4). Set
the burner assembly into its position and secure with the two screws
previously removed.
Figure 4 - Air Shutter Adjustment Rod
Burner Tube
Adjustment
Set-Screw
Air Shutter
Adjustment Rod Down
(Fully-Open Position)
Adjustment Rod Up
(Fully-Closed Position)
12. Reinstall the sub floor with screws.
13. Reassemble the remaining components.
14. Turn on gas supply and test for gas leaks. Never check for leaks with
a flame!
15. Relight the main burner. Verify proper burner ignition and operation.
16. Inspect the pilot system for proper flame. The pilot flame should
engulf the flame sensor. See Figure 6.
9. Replace the pilot orifice with the one provided in this kit using a 4mm
allen wrench.
Models Natural Gas Propane Gas
All 1/4” (6.35 mm) 1/2” (12.7 mm)
NOTE: When rear venting or running fireplace for an extended period of time the shutter
should be moved to a more open position by pulling rod down. (especially on LP gas)
Table 4 - Main Burner Shutter Opening—Factory Setting
Figure 5 - Burner Flame Appearance
No Blue Flame
Center
Soot at
Flame Tip
Dark Orange
Flame
IMPROPERLY
BURNING FLAME
Soot above
Flame Tip No Soot at
Flame Tip
PROPERLY
BURNING FLAME
Semi-Transparent
Yellow Flame
Blue Flame
Center
Thermocouple
Hood Igniter rod
Thermopile
Pilot Nozzels
3/8”
(9 mm) min
Figure 6 - Pilot Flame Appearance
4
Innovative Hearth Products (IHP) reserves the right to make changes at any
time, without notice, in design, materials, specifications, prices and also
to discontinue colors, styles and products. Consult your local distributor for
fireplace code information.
Printed in U.S.A. © 2018 Innovative Hearth Products
P/N 900922-02 REV. NC 10/2018 1769 East Lawrence Street • Russellville, AL 35654
Fuel Minimum Maximum
Natural Gas 5” WC / (1.25 kPa) 10.5” WC / (2.61 kPa)
Propane 11.0” WC / (2.74 kPa) 13.0” WC / (3.23 kPa)
Table 5 - Inlet Gas Supply Pressure
Fuel Pressure
Natural Gas 3.5” WC / (0.87 kPa)
Propane 10.0” WC / (2.49 kPa)
Table 6 - Manifold Gas Supply Pressure
19. Affix the appropriate conversion label (see Figure 7).
20. Replace facade and barrier before operation.
17. Using a manometer, test the inlet and manifold gas pressures (Tables
5 and 6). NOTE: Always test pressures with the valve regulator
control at the highest setting.
THIS APPLIANCE HAS BEEN CONVERTED TO:
INPUT BTU / HR - ##, ###
MANIFOLD PRESSURE - 3.5”
Orifice SIZE: ## (#.##”)
NATURAL GAS
Figure 7 - Affix Gas Conversion Sticker
THIS APPLIANCE HAS BEEN CONVERTED TO:
INPUT BTU / HR - ##, ###
MANIFOLD PRESSURE - 10”
ORIFICE SIZE: ## (#.##”)
PROPANE GAS
NOTE: A BARRIER DESIGNED TO REDUCE THE RISK OF BURNS
FROM HOT VIEWING GLASS SHALL BE USED DURING OPERA-
TION OF THIS FIREPLACE FOR THE PROTECTION OF CHILDREN
AND OTHER AT-RISK INDIVIDUALS.
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Astria Fireplaces GEMINI Instruction Sheet
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