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103568
VENT-FREE NATURAL GAS HEATERS
BLUE-FLAME CGN20, CGN20L AND RN30D
INSTALLING TO
WALL
CHECK GAS TYPE
Use only natural gas. If your gas supply is
not natural, do not install heater. Call dealer
where you bought heater for proper type
heater.
INSTALLATION ITEMS
Before installing heater, make sure you have
the items listed below:
• piping (check local codes)
• sealant (resistant to propane/LP gas)
• manual shutoff valve *
• ground joint union
• test gauge connection * (see Figure 12,
page 8)
• sediment trap
• tee joint
• pipe wrench
NOTICE: A qualified service per-
son must install heater. Follow
all local codes.
* An A.G.A. design-certified manual shutoff
valve with 1/8" NPT tap is an acceptable
alternative to test gauge connection. Pur-
chase the optional A.G.A. design-certified
manual shutoff valve from your dealer. See
Accessories, page 14.
WARNING: Maintain the mini-
mum clearances shown in Figure
4. If you can, provide greater clear-
ances from floor, ceiling, and join-
ing wall.
IMPORTANT:
Vent-free heaters add mois-
ture to the air. Although this is beneficial,
installing heater in rooms without enough
ventilation air may cause mildew to form
from too much moisture. See Air for Com-
bustion and Ventilation, pages 3 through 5.
CAUTION: This heater cre-
ates warm air currents. These
currents move heat to wall sur-
faces next to heater. Installing
heater next to vinyl or cloth wall
coverings or operating heater
where impurities in the air (such
as tobacco smoke) exist, may
discolor walls.
WARNING:
Never install the heater
• in a bedroom or bathroom
• in a recreational vehicle
• where curtains, furniture,
clothing, or other flammable
objects are less than 36 inches
from the front, top, or sides of
the heater
• as a fireplace insert
• in high traffic areas
• in windy or drafty areas
You can locate model CGN20 and CGN20L
on the floor, away from a wall. An optional
floor mounting stand is needed. Purchase
the floor mounting stand from your dealer.
See Accessories, page 15.
LOCATING HEATER
This heater is designed to be mounted on a
wall.
CAUTION: If you install the
heater in a home garage
• heater pilot and burner must
be at least 18 inches above
floor
• locate heater where moving
vehicle will not hit it
For convenience and efficiency, install heater
• where there is easy access for operation,
inspection, and service
• where strong wind gusts from an open
door or garage door can not blow directly
into heater.
An optional fan kit is available from your
dealer. See Accessories, page 15. If plan-
ning to use fan, locate heater near an electri-
cal outlet.
Figure 4 - Mounting Clearances As Viewed From Front of Heater
*Minimum To Floor
16 3/4" - RN30D
3" - CGN20(L)
36" Minimum
6" Minimum from
Sides of Heater
Left
Side
FLOOR
Right
Side
CEILING