UHA STANDARD UNIT HEATER INSTALLATION OPERATION AND SERVICE MANUAL

Figure 9: Separated Combustion Heater - Vertical and Horizontal Vent Termination

12" (31 cm)

 

Minimum from air inlet to vent

12" (31 cm)

termination.

Minimum from roof to vent

 

termination.

Air Intake*

Vent**

 

 

 

Vertical

 

 

Option

Horizontal

12" (31 cm)

 

90°

Option

Minimum from air inlet to vent

 

termination.

Bend

Air Intake

 

 

 

Air Intake

 

 

Termination

 

 

Vent

 

 

Termination

 

Vent**

12" (31 cm)

 

 

 

 

Minimum from wall

 

 

to vent termination.

Model

**Vent Diameter

Part Number

UHA[X]S 150 - 400

4" (10 cm)

90502102

Model

*Air Intake Diameter

Part Number

UHA[X]S 150 - 250

4" (10 cm)

90502102

UHA[X]S 300 - 400

5" (13 cm)

90502105

Listed Thimble through

 

Combustible Wall

NOTE: Vent supports not shown

Figure 10: Concentric Vent Box

 

 

 

of

4"

(10

cm)

 

 

piece

Model

 

 

 

 

One

 

 

 

 

 

 

 

4" (10 cm) or

.Selkirk

 

“B”

vent

 

 

 

 

5" (13 cm)

 

 

 

 

 

 

 

 

 

 

 

Seal joint between single wall

and Type B vent with silicone sealant.

Combustion Air

 

to Heater

Use 3 sheetmetal

Exhaust

screws equally

spaced around joint.

from Heater

4" (10 cm) Single Wall Vent Pipe (By Others)

type

 

 

 

(6

cm)airspace

 

 

1/4"

 

others)

 

 

.(By

 

diameter,ui

 

 

 

 

 

alent

 

 

 

q

v

 

 

 

Vor

e

 

 

 

 

R

 

 

 

 

 

Toward

Outside

6" (15 cm) or 8" (20 cm) Single Wall Inlet Air Pipe

Concentric (By Others) Vent Box

Use 3 sheetmetal screws equally spaced around collar.

16 of 51

Page 24
Image 24
Roberts Gorden 200, 350, 150, 400, 250, 300, 225, 175 service manual Concentric Vent Box

175, 225, 300, 250, 400 specifications

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