31
This type of installation can cause non-warrantable
problems with components and poor operation of the
boiler due to the recirculation of flue products. Multi-
ple vent caps installed in the same horizontal plane
must have a 4 ft clearance from the side of one vent
cap to the side of the adjacent vent cap(s).
Combustion air supplied from outdoors must be free of
particulate and chemical contaminants. To avoid a
blocked flue condition, keep the vent cap clear of
snow, ice, leaves, debris, etc.
The stainless steel flue direct vent cap must be fur-
nished by the boiler manufacturer in accordance with
its listing (sales order option D-15).
Outdoor Installation
Outdoor models must be vented with listed vent mate-
rial per the following instructions and installed with the
optional factory-supplied outdoor vent kit. A special
vent terminal is provided in accordance with CSA
requirements. These must be installed as illustrated in
Fig. 25.
Care must be taken when locating the unit outdoors,
because the flue gases discharged from the vent cap
can condense as they leave the cap. Improper location
can result in damage to adjacent structures or building
finish. For maximum efficiency and safety, the follow-
ing precautions must be observed:
1. Outdoor models must be installed outdoors and
must use the outdoor vent cap available from the
manufacturer (sales order option D-11).
2. Periodically check venting system. The unit’s
venting areas must never be obstructed in any
way and minimum clearances must be observed
to prevent restriction of combustion and ventilation
air. Keep area clear and free of combustible and
flammable materials.
3. Do not locate adjacent to any window, door, walk-
way, or gravity air intake. The vent must be
located a minimum of 4 ft horizontally from such
areas.
4. Install above grade level and above normal snow
levels.
5. Vent terminal must be at least 3 ft above any
forced air inlet located within 10 ft.
6. Adjacent brick or masonry surfaces must be pro-
tected with a rust-resistant sheet metal plate.
Freeze Protection
The Raypak electronic temperature control includes a
freeze protection feature. In the event the temperature
drops below 40°F at any of the temperature sensors,
the pump is turned on and will remain on until the tem-
peratures at all sensors rise to 45°F.
WARNING:
No substitutions of flue pipe or vent
cap material are allowed. Such substitutions would
jeopardize the safety and health of inhabitants.
NOTE:
The vent cap must be furnished by the boiler
manufacturer in accordance with its listing (sales
order option D-11).
NOTE:
Condensate can freeze on the vent terminal.
Frozen condensate on the vent terminal can result in
a blocked flue condition.
Fig. 25: Outdoor Venting
Model
No.
Size
(in.)
Approved
Plastic
Terminals
Approved SS
Terminals
300
4
PVC Tee,
Sch 40*
FasNSeal FSTT4,
Z-Vent 2SVSTTF04
400
500
700
6
PVC Tee,
Sch 40*
FasNSeal FSTT6,
Heat Fab 9690TEE
850
Table P: Outdoor Vent Terminals
*Must be ULC-S636 materials in Canada.
Summary of Contents for H 300 Series
Page 40: ...40 WIRING DIAGRAM...
