Specifications

25
Figure 16. Heater Assembly: Model U tube 60-U20 and 80-U20.
F
COUPLERS
BURNER
END
CAPS
(OPTIONAL)
6"
4"
10' 3" REFLECTORS TYPICAL OF 2
DISTANCE BETWEEN
SUSPENSION POINTS
NO TO EXCEED 12'
12'1½" NOMINAL OVERALL ASSEMBLED LENGTH
DETAIL
FIXED REFLECTOR BRACKET
REFLECTOR
TUBE
STRAP
RADIANT
TUBE
2 x SCREWS TIGHTEN TO
FIX REFLECTOR
SUPPLIED
NUT &
BOLT
C
L
2" MINIMUM
REFLECTOR OVERLAP
F
STANDARD 4" COUPLER
BURNER INSERT
SEE DETAIL
GH
3' 3"
GG
F
TUBE ORIFICE
SEE DETAIL
BURNER INSERT DETAIL PT. NO. 270489
NOTE: FOR MODEL 25 NAT GAS ONLY
TUBE ORIFICE DETAIL PT. NO. 270318
Pre-welded into tube 270492, 14½” from end
NOTE: FOR MODEL 12 ONLY
TURBULATOR DETAIL PT. NO. 270495
NOTE: FOR MODELS 18/25 LP GAS ONLY
12-U20
MODEL NUMBER
41,500
NAT GAS
BTU/HR
41,500
LP GAS
BTU/HR
18-U20
60,000 60,000
25-U20
80,000 80,000
FIRST SUSPENSION POINT TUBE STRAP
DETAIL
TUBE & REFLECTOR SUSPENSION BRACKET
DETAIL
TUBE
STRAP
RADIANT
TUBE
SUPPLIED
NUT & BOLT
SUSPENSION
BRACKET
REFLECTOR
H G
"A"
VIEW ON "A"
Burner Rating
60-U20
80-U60