Gas Connections And Regulations - Space-Ray ADU25 Installation And Operation Instruction Manual

11.0) GAS CONNECTIONS AND REGULATIONS

IMPORTANT BEFORE CONNECTING THE GAS TO THE HEATER
Connect to the supply tank or manifold in accordance with state or local building codes. Authorities having
a.
jurisdiction should be consulted before the installation is made.
Check that the gas fuel on the burner rating plate matches the fuel for the application.
b.
Check that the gas supply piping has the capacity for the total gas consumption of the heaters and any other
c.
equipment connected to the line.
Check that the calculated supply pressure with all gas appliances and heaters operating will not drop below
d.
the minimum supply pressure required for these heaters. See Table 17 Below.
Table 17
Gas type Appliance
Category
Natural Gas (G20) 2
H
LPG (G31) 3
P
All gas supply lines must be located in accordance with the required clearances to combustibles from the
e.
heater as listed on the clearances label of the heater and (Section 4.0) of this manual.
Pipe joint compounds must be resistant to the action of liquefied petroleum gases.
f.
Tube heaters will expand/contract during operation. Use an approved flexible connector for connections
g.
between the rigid piping and the heater. A union should be installed before the control box inlet. An
approved shut off valve should be installed within 1.8m of the union.
The gas pipe, flexible hose and connections must be self supporting. The gas pipe work must not bear any of
h.
the weight of the heater or any other suspended assembly.
This appliance is equipped with a step-opening, combination gas valve. The maximum supply pressure to the
i.
appliance is 60 mbar. If the line pressure is more than the maximum supply pressure, then a second stage
regulator which corresponds to the supply pressure must be used.
After all gas connections have been made, make sure the heater and all gas outlets are turned off before
j.
the main gas supply is turned on slowly. Turn the gas supply pressure on and check for leaks.
If a 2nd stage regulator is used, the ball valve down stream in the supply line must be closed when purging
k.
the gas lines to prevent gas seeping through it. If initial gas pressure is higher than 60 mbar the redundant
combination gas valve is designed to lock out. Pressure build-up in the supply lines prior to the heater must
be released before proper heater operation.
High gas pressure regulators need to be installed upstream of flexible gas lines
l.
m. The entire gas supply system must be checked for leaks prior to heater operation.
Nominal Supply Maximum
Pressure Supply Pressure
20 mbar 25 mbar
37 mbar 45 mbar
-40-
Minimum Supply Setting Pressure
Pressure
17 mbar 12.5 mbar
30 mbar 25 mbar
Form #44201100
Oct 2019