Re-Verber-Ray LD Series Installation Manual page 27

LD Series
Common Venting
• A staggered arrangement or a dual exhaust assembly (P/N: DB-Y) must be used when joining two
heaters to a common vent so that by-products of one heater do not flow into the adjoining vent of
the other heater.
• 4 in. diameter double-wall Type B-vent and 4 in. vent cap must be used.
• Common vented heaters must be controlled with the same thermostat. Do not operate individually.
Figure 3.23 • Common Rooftop Venting - Side View
4 in. Rooftop Vent Cap
4 in. Double Wall B Vent
Firestop Spacer
Figure 3.24 • Common Sidewall Venting - Top View
4 in. Sidewall Vent Cap
(P/N: SWD-4)
Wall Thimble
Double Wall B-Vent
4 in. Single Wall Vent
Heater
Dual Exhaust Assembly
P/N: DB-Y
Sidewall
6 in.
min.
24 in.
Min.*
3 in. Single Wall
Vent Pipe
Heater
B To C
Adapter
27
3.0 Installation
• Common Venting
Roof
*Consult the NFPA ANSI Z223.1 Gas
Vent Termination criteria if roof pitch
exceeds 9:12.
Heater
Dual Exhaust Assembly
P/N: DB-Y
Heater