Roberts Gorden NDUSTRIA NHE Series Installation, Operation & Service Manual page 56

NHE-S I , O
ERIES NSTALLATION PERATION AND
8.16.3 Horizontal Outside Air Supply for Single Heater Installation
Description
Vent Cap, Metalbestos - 4" (10 cm)
8.16.4 Vertical Outside Air Supply for Double Heater Installation
Description
Vent Cap, Metalbestos - 6" (15 cm)
Requirements:
• Heaters must be controlled by a common thermostat.
• All joints must be sealed.
52
S M
ERVICE ANUAL
Vent Cap
Part Number
90502300
Part Number
90502302
4" (10 cm)
Single Wall Pipe
Flex Hose
(Recommended)
Band Clamp
(Recommended)
Burner