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Roberts Gorden UHD[X][S][R] 225 Manuel D’Utilisation

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UHD S
TANDARD
 D
UCT
 F
URNACE
 I
NSTALLATION
 O
PERATION
 
AND
 S
ERVICE
 M
ANUAL
8 
5.1.3 Air Flow And Temperature Rise Ranges
5.2 Suspension
Four suspension points (3/8" nuts) are located on 
the top of the heater. Drop rods must be 3/8" 
diameter mild steel.
When handling or supporting the heater from below, 
ensure that the weight is taken at the support points.
For typical suspension, See Page 8, Figure 3.
The gas or electrical supply lines must not be used 
to support the heater. 
Do not locate the gas or electrical supply lines 
directly over the path of the flue products from the 
heater.
The heater must be installed in a location that is 
readily accesible for servicing.
The heater must be installed in accordance with 
clearances to combustibles as indicated on the wall 
tag and in this manual.
Figure 3: Suspension Methods
Model
Rate
Air Flow
Temperature Rise
(Btu/h)
Minimum (CFM)
Maximum (CFM)
Minimum (°F)
Maximum (°F)
UHD[X][S][R] 150
150,000
1,360
5,800
20
83
UHD[X][S][R] 175
175,000
1,400
6,850
20
95
UHD[X][S][R] 200
200,000
2,050
7,750
20
73
UHD[X][S][R] 225
225,000
2,100
8,300
20
80
UHD[X][S][R] 250
250,000
2,350
8,850
22
80
UHD[X][S][R] 300
300,000
2,700
10,200
23
86
UHD[X][S][R] 350
350,000
3,120
13,600
22
86
UHD[X][S][R] 400
385,000
3,420
14,200
22
86
WARNING
Crush Hazard
Use 3/8" threaded rod 
minimum.
Failure to follow these 
instructions can result in 
death, injury or property 
damage.
Nut
Washer
Riv
Nut
Ensure all suspension
hardware is torqued to
a minimum of 20 ft lbs.
Support Points
3/8"
Threaded
Rod
Cone Point
Set Pin
Window
Clamp
Unistrut
Unistrut
3/8"
Threaded
Rod
Washer
Nut
Channel Nut
NOTE: Duct 
 
supports 
 not 
shown.  
 
Duct supports  
 and 
duct are  
 not 
provided by 
 manufacturer.