5
GrandCanyonGasLogs.com
Primary
Outlet
Pilot
Adjustment
Key
(under cap)
Pilot
Outlet
Intlet
Wrench
Boss
Gas
Cock
Dial
STEP BY STEP PRE-INSTALLATION
This Millivolt control system must be installed by a qualified gas
professional. These instructions MUST be followed to ensure proper performance
and safety. Failure to do so could result in serious injury or death.
Millivolt valve system is shipped pre-assembled with fittings and heat shields already attached.
For systems ordered “Assembled” the valve system is pre-assembled and tested at the factory before shipping.
Perform the installation with extreme care ensuring not to damage the valve or pilot assembly or other
connections. It is also recommended that the valve assembly is performed outside of the fireplace.
Pre-Installation –
For assembly of control system to an existing gas log system, ensure that all the media has been removed and
the burner is clear of all dust and debris. Check to ensure that the valve system and burner are labeled for the
gas type supplied to the fireplace (Natural Gas or Propane). Also check to ensure that the proper gas pressure
is supplied to appliance (Minimum 5" W.C Natural Gas, Minimum 10" W.C Propane).
This Millivolt Control must be installed by a qualified professional
service technician. Instructions must be followed carefully when installing
to ensure proper performance.
These instructions must be used as a supplement to the instructions supplied with the Grand Canyon
Gas Logs burner system. Follow the burner system instructions and make adjustments as appropriate
for the addition of a millivolt system. Use gas pipe sealing compound that is resistant to all gases (or
Teflon tape) and apply to all male pipe connections. DO NOT apply pipe sealing compound to any flare
connections. Make sure that all connections are tight and leak tested.
1. Check replacement valve for multiple outlets (side
outlets). If it has them, be sure all unused outlets are
plugged using the socket plugs provided.
2. Pipe or tubing must be clean and free of scale and
dirt.
3. Make sure gas piping is pressure tested before
control is connected. High pressure can damage con-
trol causing a hazardous condition.
Do not subject control to more than 1/2 psi, (14”
W.C.) inlet pressure.
4. If it is not already installed, a drip leg (sediment
trap) must be added to the gas supply line to control.
(See figure to the right.) All piping must comply with
local codes and ordinances and with National Fuel
Gas Code (ANSI Z223.1/NFPA, No. 54).
5. Using pipe thread compound or tape (suitable for
gas), apply a small amount on the male pipe threads.
