Freeze Protection
The Raypak electronic temperature control includes a
freeze protection feature. In the event the water tem-
perature drops below 40°F at any of the heater
temperature sensors, the pump is turned on and will
remain on until the temperature at all heater sensors
rises to 45°F.
PVC Venting Option
Venting of the XTherm with PVC material requires the
factory installed D-32 adapter kit.
The PVC vent adapter should appear as in Fig. 30 and
Fig. 31.
Cleaning
Priorto 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.
30
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 a nd 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 o f eye and/or skin co ntact,
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,
stiror shake, making sure contents are liquid. Do
not use if found to be lumpy or jelly-like.
• Restorationof the original viscosi ty 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 100% fire 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/NFPA54.
NOTE: Cleaners and primers are intended for
different functions and should not be considered
interchangea ble. Verify with ven t material
manufacturer for specific requirements.
Termination
Terminationshould be accomplished using the adapter
thimble as shown in Fig. 32 and Fig. 33. The adapter
thimble is supplied by Rapak as part of the D-32
option.
PVC vent assembly instructions
1) Cut pipe ends squarely, removing all burrs and
dirt.
2) Dryfit pipe and fittings to be connected for proper
fit.
3) Cleanpipe and fitting with a cleaner.
4) Applya coat of primer to pipe and fitting.
5) Applya thin coat of cement to fitting, avoiding pud-
dling inside.