John-wood Power Direct Vent (Non-ENERGY STAR qualified model User Manual download pdf (Page 10)

Vent Pipe Runs

1. The exhaust vent system must not, under any circum-

stances, be run downhill then run uphill thus forming a

valley. It may leave a space to accumulate condensa-

tion and block vent pipe.

2. Horizontal runs require a minimum 3mm (1/8 in.) rise

per 1.5m (5 ft) and a support every 1.2m (4 ft.). Ensure

there is enough height between heater and termination

to raise vent pipe runs the required distance.

3. Vertical runs require a support every 1.5m (5 ft.) that

must provide proper support to prevent stress on the

pipes.

Vent Pipe Termination

This water heater includes one (1) pair of more restrictive

Vent Termination Screens and one (1) pair of less restrictive

Vent Termination Screens. For safety and optimum efficien-

cy performance, ensure the correct Vent Termination

Screen is installed for the vent length in your installation.

Note: Before installing the Power Direct Vent Water Heater,

it is recommended that the location of the pipe terminations

(air intake and exhaust vent) be determined.

Use the more restrictive Vent Termination Screen shown in

Figure 5a when the equivalent vent length (see Table 1) is

between 2.1 and 7.6m (7 and 25 ft.). Install the Vent

Termination Screen in the Termination Elbow as shown, on

both the air intake pipe and the exhaust pipe.

Use the less restrictive Vent Termination Screen shown in

Figure 5b when the equivalent vent length (see Table 1) is

between 7.6 and 15.2m (25 and 50 ft.). Install the Vent

Termination Screen in the Termination Elbow as shown, on

both the air intake pipe and the exhaust pipe.

Figure 4 Correct Pipe Fittings

90° SHORT SWEEP ELBOW

(MORE RESTRICTIVE)

90° LONG SWEEP ELBOW

(LESS RESTRICTIVE)

WARNING

This unit includes an air intake terminal and

an exhaust vent terminal.

Figure 5a Vent Termination Screen (more restrictive)

for equivalent vent lengths from 2.1 to 7.6m

(7 to 25 ft.).

Figure 5b Vent Termination Screen (less restrictive)

for equivalent vent lengths from 7.6 to 15.2m

(25 to 50 ft.).

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John-wood Power Direct Vent (Non-ENERGY STAR qualified model User Manual Page 10

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