Design Dynamics VTD-18N-PDG - Manual (Page 7)

www.desatech.com 111826-02J 7
INStALLAtION
Continued
Damper
Clamp
Damper
Damper
Damper
Clamp
Masonry Fireplace Manufactured
Fireplace
Figure 4 - Attaching Damper Clamp
The minimum flue sizes shown in Figure 3, page
6, are based on a 6' chimney height using round
pipe. Your minimum flue size will vary based
on input rate and chimney height. Refer to the
National Fuel Gas Code ANSI Z223.1/NFPA 54,
Section 6.6 for details.
INSTALLING DAMPER CLAMP
Secure damper stop clamp to edge of damper as
shown in Figure 4. I for any reason this clamp
doesn't work on your fireplace, another suitable
clamp or permanent stop must be installed or
damper blade must be removed.
INSTALLING HEATER ASSEMBLY
CAUTION: Do not remove the
data plates attached to the heater
base assembly. The data plates
contain important warranty and
safety information.
WARNING: If installing in a
sunken fireplace, special care
is needed. You must raise the
fireplace floor to allow access to
heater control panel. This will in-
sure adequate air flow and guard
against sooting and controls be-
ing damaged. Raise fireplace floor
with noncombustible material.
Make sure material is secure.
CAUTION: Do not pick up
heater assembly by the logs. This
could damage heater. Only han-
dle base assembly by grates.
IMPORTANT: Make sure appliance is level. If
heater is not level, heater will not work properly.
Installation Items Needed
• control cover kit (provided with heater)
• approved flexible gas hose (provided) (if al-
lowed by local codes)
• sealant (resistant to propane/LP gas, not
provided)
• pipe wrench
Note:
Install optional remote control accessories
(see Accessories, page 19) before installing gas
log heater.
1. Apply pipe joint sealant lightly to male threads
of gas fitting (not provided). Connect approved
flexible gas hose to inlet side of gas control (see
Figure 5). IMPORTANT: Hold gas fitting with
wrench when connecting flexible gas hose.
2. Position heater assembly in fireplace.
3. Connect to gas supply. See Connecting to
Gas Supply.
CONNECTING TO GAS SUPPLY
WARNING: This appliance
requires a 3/8" NPT (National
Pipe Thread) inlet connection to
the pressure regulator.
WARNING: A qualified ser-
vice person must connect heater
to gas supply. Follow all local
codes.
Gas Control
Flexible
Gas Hose
(if allowed
by local
codes)
Figure 5 - Attaching Flexible Gas Hose to
Heater Gas Regulator