Use and Care Manual
This instruction will only cover the installation of
the Metal-Fab, Inc., Sealed Combustion Vertical
Vent Kit to the tankless water heater. Refer to
the Owner’s Use and Care Manual provided with
your Direct Vent Tankless Water Heater for addi-
tional installation considerations and directions.
The Sealed Combustion Vertical Vent Kit (RTG20211) is designed for use
with ONLY the following models:
Tankless Water Heater 3”/ 5” Concentric Direct Vent
Vertical Vent Kit Installation Instructions
!
DO NOT ATTEMPT TO CUT THIS VENTING MATERIAL,
CUT SECTIONS WILL NOT SEAL AND COULD CAUSE
IMPROPER OPERATION OF THE WATER HEATER.
CONCENTRIC VENT JOINT ASSEMBLY
Connections between vent and ttings are male/female type. The inner duct
is sealed with an integral seal gasket and the joint is mechanically secured
via the overlapping outer wall of the double wall pipe.
J o i n t s a r e a s s e m b l e d
per the follo win g st eps:
A. Before assembly, observe
that the seal gasket is located
within the female inner pipe
joint. Locate next pipe or tting
with male inner pipe joint and
insert to begin engagement
of inner pipe joint. To help the
joints slide together, apply
a light amount of silicone or
water-based lubricant to the
silicone seals.
B. A s t h e j o i n t f u r t h e r
engages, align the male and
female ends of the outer wall of
each pipe so that they begin to
engage as the pipes are further
pushed together.
C. Pipe joint is fully engaged
when the female end of the
outer pipe comes in contact (or
is at least within 1/16
th
inch) to
the base of bead on the male
end of the adjoining vent pipe.
D. When possible look within
the pipe assembly to verify
that no sign of seal gasket is
showing. Complete the joint
assembly by securing the joint
using #8 x 1/2” sheet metal
screws (3 per joint) at each pre-
punched hole on the female
end of each joint.
Joint Assembly - Figure 1
SEAL
GASKET
A B
DC
1
16
" GAP (MAX.)
This kit contains:
Vertical Termination, Storm Collar, 6/12 to
12/12 Pitched Roof Flashing, Hardware, and
Installation Instructions. Condensate Drain Line
Unpack the Vertical Vent Kit, inspect all
parts for damage, and make sure none of
the parts are missing. Contact the supplier
if there are parts missing.
Installation Location – After choosing the installation location for the
water heater, see the Use and Care Manual provided with the tank-
less water heater for information and clearances, mount the water
heater to the wall as instructed.
When cutting the hole, cover the vent of the water heater to prevent
any debris from falling into the ue. Remove this cover prior to com-
pleting the installation
Cut a six (6) to eight (8) inch hole in the roof for the vent to pass
through directly above the center of the water heater.
!
!
1
!
(01/10) AP15597
L2615
WARNING: SHEET METAL SCREWS ARE FOR OUTER
WALL ONLY. NEVER USE SCREWS, RIVETS OR OTHER
FASTENERS TO PENETRATE THE INNER PIPE WALL.
NOTICE: THIS KIT CONTAINS SHEET METAL PARTS,
WHICH MAY HAVE VERY SHARP EDGES. USE LEATH-
ER GLOVES WHEN HANDLING VENT COMPONENTS.
WARNING : IMPROPER INSTALLATION OF VENTING,
OR FAILURE TO FOLLOW ALL INSTALLATION
INSTRUCTIONS COMPLETELY, CAN RESULT IN
PROPERTY DAMAGE AND/OR DEATH.
It is very important that all persons who are expected to install, operate,
or adjust this vent system and/or water heater read these instructions
along with those instructions provided with the tankless water heater.
NOTICE: This kit contains parts for minimum
venting requirements ONLY! Additional vent
piping required may be purchased seperately
to complete the installation of this kit. See the
Use and Care Manual provided with the tankless
water heater for maximum vent lengths and
condensate drain line information.
RTG-95DVN RUTG-95DVN RMTG95DVN ECO200DVN3
RTG-84DVN RUTG-84DVN RMTG84DVN ECO180DVN3
RTG-64DVN RUTG-64DVN RMTG64DVN ECO150DVN3
PH2-28RDVSN PH2-25RDVSN PH2-20RDVSN
Replace the “N” sufx for Natural Gas with a “P” for LP Gas
This kit may be used with the following models provided a RTG20144-3 Ap-
pliance Adapter and RTG20151S Vertical Condensate Collector is installed,
must be purchased separately. Installation distances will vary from the
instruction below.
RTG-66DV* RTG-53DV* PH-25R DVS* ECO-180DV*
RUTG-66DV* RUTG-53DV* PH-20R DVS* PTG-53DV*
RMTG-66DV* RMTG-53DV*
* P - sufx for LP Gas
* N - sufx for Natural Gas
Clearance Considerations - The concentric vent piping and t-
tings are certied for a clearance of zero (0) inches to combus-
tible surfaces.