BASO BGD258 Series BASOTROL CE Approved Class A Gas Valve User Manual
Page 3

BASOTROL CE Approved Gas Valve Installation Instructions 3
Wiring
!
WARNING: Risk of Electrical Shock.
Disconnect the power supply before making 
electrical connections to avoid electrical shock or 
equipment damage. Ensure that the operating 
voltage is identical to the information on the product 
identification label. 
The BGD258 valve is supplied with 3-tab or 2-tab 
electrical connections. The solenoid coils are male 
tabs and electrical connections should be made using 
6.35 x 0.8 mm (1/4 in.) female, fully insulated push-on 
terminals. The earth ground is clearly labeled. 
The electrical wiring to a twin solenoid valve from an 
electronic intermittent proven pilot ignition system is 
comprised of two lines; a common and an independent 
earth ground. Wiring can be done using a single 4-wire 
cable. The wiring connections for a 4-wire cable are 
shown in Figure 5. 
Route the electrical cable for the valve solenoid from 
the burner sequence control to the valve and make 
wiring connections in accordance with Figure 5. 
Note: Electrical connections can also be made using 
pre-wired electrical plugs (DIN 43650 Form B 
[ISO 4400]). 
Note: All wiring must be in accordance with national 
and local electrical codes and regulations. 
Setup and Adjustments
Checkout
!
WARNING: Risk of Fire or Explosion.
Follow this or an equivalent checkout procedure 
after installation. Before leaving the installation, 
verify that the gas valve functions properly and that 
the system has no gas leaks. Gas leaks can lead to 
an explosion or fire, and may result in severe 
personal injury or death. 
IMPORTANT: All adjustments must be made in 
conjunction with the gas appliance and in 
accordance with the appliance manufacturer’s 
instructions. Only authorized personnel should make 
adjustments. 
!
WARNING: Risk of Fire or Explosion.
The minimum flow rate of the valve must not be 
adjusted below the minimum safe working rate of the 
appliance. This may cause gas leaks, which can 
lead to an explosion or fire and may result in severe 
personal injury or death. 
Make sure all components are functioning properly by 
performing the following test: 
1. Test all joints and connections for leaks with a
soap solution.
2. Close the main upstream shutoff valve and wait at
least 5 minutes for unburned gas to escape from 
the appliance, and then reopen the shutoff valve. 
3. Turn on the main electrical power switch and close 
the thermostat contacts. The appliance should operate 
in accordance with the manufacturer’s specified 
sequence of operation. 
4. Turn the thermostat to a low dial setting to open 
the contacts. All burner flames should be extinguished. 
Repeat Steps 3 and 4 at least three times. 
5. Return the thermostat to a normal setting before 
leaving the installation. 
Repairs and Replacement
Table 1: Replacement Solenoid Coil
Part Number
Description
RSDA16A-12
12 VDC; 2-tab 15 VA Coil
RSDA16A-25
25 VAC; 50/60 Hz; 3-tab 15 VA Coil
RSDA16A-25V
25 VDC; 3-tab 17 VA Coil
RSDA16A-120
120 VAC; 50/60 Hz; 3-tab 15 VA Coil
RSDA16A-240
240 VAC; 50/60 Hz; 3-tab 15 VA Coil
 
Field repairs other than solenoid coil replacement 
must not be made to the BGD258 valve. 
Any attempt to repair this assembly voids the 
manufacturer’s warranty. For a replacement valve, 
contact the original equipment manufacturer or the 
nearest BASO Gas Products distributor.
