Raypak Hi Delta 992B-1262B User Manual download pdf (Page 32)

For installations in extremely cold climate, it is re-

quired that:

1. The vent must be installed with a slight upward

slope of not more than 1/4 inch per foot of hori-

zontal run to the vent terminal. In this case, an

approved condensate trap must be installed per

applicable codes.

2. The intake vent must be insulated through the

length of the horizontal run.

Termination

The flue direct vent cap MUST be mounted on the ex-

terior 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 1 ft above ground level and

above normal snow levels.

The direct vent cap MUST NOT be installed with any

combustion air inlet directly above a direct vent cap.

This vertical spacing would allow the flue products

from the direct vent cap to be pulled into the combus-

tion air intake installed above.

This type of installation can cause non-warrantable

problems with components and poor operation of the

heater due to the recirculation of flue products. Multi-

ple direct vent caps should be installed in the same

horizontal plane with 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 heater manufacturer in accordance with

its listing (sales order option D-15).

Use only the special gas vent pipes listed for use with

Category III gas burning heaters, such as the AL29-4C

stainless steel vents offered by Heat Fab Inc. (800-

772-0739), Protech System, Inc. (800-766-3473),

Z-Flex (800-654-5600) or American Metal Products

(800-423-4270). Pipe joints must be positively sealed.

Follow carefully the vent manufacturer’s installation

instructions.

WARNING: No substitutions of flue pipe or vent

cap material are allowed. Such substitutions would

jeopardize the safety and health of inhabitants.

Direct Vent - Vertical

Installation

These installations utilize the heater-mounted blower

to draw combustion air from outdoors and force the

heated flue products through the vent pipe under posi-

tive pressure. The vent material must be in

accordance with the above instructions for vent mate-

rials. Vent material must be listed by a nationally

recognized test agency.

The connection from the appliance flue to the stack

must be as direct as possible and should be the same

size or larger than the vent outlet.

See Table K for Category I venting guidelines.

It is recommended that in colder climates, the intake

vent be insulated.

Termination

The flue terminal should be vertical and should termi-

nate outside the building at least 2 ft above the highest

point of the roof within 10 ft. The vent cap should have

a minimum clearance of 4 ft horizontally from and in no

case above or below (unless a 4 ft horizontal distance

is maintained) electric meters, gas meters, regulators

and relief equipment. The distance of the vent terminal

from adjacent public walkways, adjacent buildings,

open windows and building openings must be consis-

tent with the NFGC (U.S.) or B149 (Canada).

Note: When vertical height exceeds 25 ft, consult

factory prior to installation.

Fig. 30: Direct Vent - Vertical

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 65 66

Comments to this Manuals

No comments

Raypak Hi Delta 992B-1262B User Manual Page 32

Comments to this Manuals

Related products and manuals for Water equipment Raypak Hi Delta 992B-1262B