Raypak HI DALTA HD101 User Manual download pdf (Page 28)

Horizontal Thru-wall Venting

System (Category III) Installation

hese installations utilize the heater-mounted blower

to vent the combustion products to the outdoors.

Combustion air is taken from the space and the vent is

installed horizontally through the wall to the outdoors.

dequate combustion and ventilation air must be sup-

plied in accordance with the NFGC or, in Canada, the

B149 Installation Code.

The total length of the horizontal thru-wall exhaust

vent system should not exceed one hundred (100) feet

in length. If horizontal run exceeds 100 feet, an appro-

priately sized extractor must be used. Each elbow

used is equal to ten (10) feet of straight pipe. This will

allow installation in one of the four following combina-

tions.

· 100’ of straight flue pipe.

· 90' of straight flue pipe and one elbow.

· 80' of straight flue pipe and two elbows.

· 70' of straight pipe and three elbows.

· 60' of straight pipe and four elbows.

The vent cap is not considered in the overall length of

the venting system. The vent must be installed to pre-

vent the flue gas leakage. Care must be taken during

assembly to ensure that all joints are sealed properly

and are airtight.

The horizontal portions of the vent shall also be sup-

ported for the design and weight of the material

employed to maintain clearances and to prevent phys-

ical damage or separation of joints.

The vent must be installed to prevent the potential

accumulation of condensate in the vent pipes. It is rec-

ommended that:

a) The vent be installed with a slight downward slope

of not more than 1/4" per foot of horizontal run to

the vent terminal.

b) The vent be insulated through the length of the

horizontal run.

For appliances installed in extreme cold climate, it is

recommended that:

a) The vent be installed with a slight upward slope of

not more than 1/4" per foot of horizontal run to the

vent terminal. In this case, an approved conden-

sate trap must be installed per applicable codes.

Horizontal Thru-wall Direct Vent

Termination

The flue exhaust direct vent cap MUST be mounted on

the exterior of the building. The direct vent cap cannot

be installed in a well or below grade. The direct vent

cap must be installed at least one (1) foot above

ground level and above normal snow levels.

Multiple direct vent caps MUST NOT be installed with

one combustion air inlet directly above a direct vent

cap. This vertical spacing would allow the flue prod-

ucts from the direct vent cap to be pulled into the

combustion air intake installed above. This type of

installation can cause non warrantable problems with

components and poor operation of the unit due to the

recirculation of flue products. Multiple direct vent caps

should be installed in the same horizontal plane with a

three (3) foot 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 flue exhaust direct vent cap must be furnished

by the heater manufacturer in accordance with its

listing. Use only the special gas vent pipes listed for

use with Category III gas burning heaters, such as the

stainless steel vent by Heat Fab Inc (800-772-0739),

Protech Systems, Inc. (800-766-3473) or Z-Flex (800-

654-5600). Pipe joints must be positively sealed.

Follow the vent manufacturers installation instructions

carefully.

WARNING: No substitutions of flue pipe or vent

cap material are allowed. Such substitutions would

jeopardize the safety and health of inhabitants.

b) The vent be insulated through the length of the

horizontal run.

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 47 48

Comments to this Manuals

No comments

Raypak HI DALTA HD101 User Manual Page 28

Comments to this Manuals

Related products and manuals for Water boiler Raypak HI DALTA HD101