35
38°F, the VERSA starts the burner at the minimum fir-
ing rate. The burner cycle will terminate when both the
Inlet and Outlet temperatures rise above 42°F.
PVC Venting Option (D-32)
Venting of the XTherm with PVC material requires the
factory installed D-32 adapter kit. The PVC vent
option requires a 200
°
F manual reset high limit.
The PVC vent adapter should appear as in Fig. 30.
Cleaning
Prior to installing the PVC pipe and fittings, ensure that
all burrs and/or ridges have been removed. Failure to
remove burrs or ridges will result in the cement in the
fitting socket being scraped from the socket surface,
producing a dry joint with a high probability of joint fail-
ure. Remove all burrs with a knife, or with abrasive
paper.
Surfaces to be joined must be cleaned and be free of
dirt, moisture, oil, and other foreign materials.
WARNING:
Do not install the heater outdoors if
freezing conditions are typical. The condensate will
freeze and back up the flue system.
PRECAUTIONS:
Always store primers, cleaner,
and cements in cool, dry, well ventilated places. Do
not store them near heat, sparks, or flames. Keep
containers closed. Use them in well ventilated areas.
Wear impervious clothing while handling. Do not
smoke, eat, or drink while handling. Wash thoroughly
after handling and before eating. Wear eye
protection when handling. If swallowed, drink water,
do not induce vomiting, and call a physician or
poison control center immediately. If inhaled, get
fresh air and seek medical attention if ill feelings
persist. In case of eye and/or skin contact,
immediately flush with plenty of water for 15 minutes
and seek medical attention if irritation persists.
All primers, cleaners, and cements must meet all
local codes.
•
Before using primers, cleaners, and cements,
stir or shake, making sure contents are liquid. Do
not use if found to be lumpy or jelly-like.
• Restoration of the original viscosity or removal of
gelation by adding solvents or thinners is not
recommended.
•
Primers and/or cement should be NSF and/or
UPC listed.
DANGER:
Primer, cleaner, and cements are
extremely flammable. They are harmful or fatal if
swallowed. The vapors are harmful. They may
irritate eyes and skin and can be absorbed through
the skin. Read and observe all safety information
printed on primer, cleaner, and cement containers.
CAUTION:
The inlet water temperature to the
XTherm must not exceed 170ºF at any firing rate to
use the PVC venting option. The venting system
must conform to local codes and/or the current
National Fuel Gas Code ANSI Z223.1/NFPA 54. The
system setpoint must not exceed 180
°
F.
NOTE:
Cleaners and primers are intended for
different functions and should not be considered
interchangeable. Verify with vent material
manufacturer for specific requirements.
SIDEWALL VENT
TERMINATION
OPTION D-15
STAINLESS STEEL
CONDENSING
HEAT EXCHANGER
Fig. 30: PVC Vent Adapter
Top View
