PB Heat DE User Manual download pdf (Page 13)

A. GENERAL

1. Install vent system in accordance with the "Venting

of Equipment" Chapter of the National Fuel Gas

Code, ANSI Z223.1/NFPA 54, the "Venting Systems

and Air Supply for Appliances" Section of the

CAN/CSA B149.1, Natural Gas and Propane

Installation Code. or applicable provisions of the

local building codes.

2. Do not connect vent connectors serving appliances

vented by natural draft into any portion of

mechanical draft systems operating under positive

pressure.

3. Refer to the following venting options to determine

which method is applicable.

ON –

B. CHIMNEY VENTING

If venting into a masonry chimney; chimney must be

lined with a fire clay tile liner or corrosion resistant metal

liner. Type B vent may also be used as a lining system or

as a stand alone chimney vent.

1. The vent system, when installed per the following

instructions, will operate with a negative pressure (draft).

2. Horizontal portions of the venting system shall slope

upward at least 1/4” per lineal foot (21 mm per

meter) between boiler and chimney. The vent pipe

shall be supported to prevent sagging; using metal

strapping or equivalent means at no more than 4 ft.

(1.2 meter) intervals.

3. Locate fan adapter, silicone, hardware and fan

adapter gasket in boiler miscellaneous parts box

and attach to blower outlet flange. Refer to Fig. 4.1

for details.

4. Apply 1/4” (6 mm) bead of silicone around fan

adapter and slip increaser over the fan adapter. Refer

to Table 4.1 for increaser and chimney sizes.

Increaser to be provided by installer.

5. Single wall vent pipe should be furnished between

increaser and chimney. If the vent connector shall be

located in or pass through a cold area, the vent

connector shall be type B material.

C. DIRECT EXHAUST; HORIZONTAL

VENTING

1. This vent system will operate with a positive pressure

in the vent pipe. Follow vent pipe manufacturers

instructions for proper assembly of vent pipe and

fittings.

4. VENTING

Figure 4.1: Chimney Venting

VENTING

Table 4.1: Increaser & Chimney Size

Boiler

Model

Increaser Size

Vent Size

Diameter

Chimney

Height

DE-03

DE-04

DE-05

DE-06

3" to 4" (7.6 to 10.2 cm)

3" to 5" (7.6 to 12.7 cm)

4" (10.2 cm)

5" (12.7 cm)

15' (4.5 m)

All joints of positive pressure vent systems must be

sealed completely to prevent leakage of flue products

into the living space.

WARNING

Flue gases will condense as they exit the vent

termination. This condensate can freeze on exterior

building surfaces which may cause discoloration of

these surfaces.

NOTICE

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PB Heat DE User Manual Page 13

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