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LEGEND HEATERS<br />
SERVICE WORKBOOK<br />
TEST OF 1R (DPST) RELAY – POWER SUPPLY<br />
LEGEND HEATERS<br />
SERVICE WORKBOOK<br />
GAS VALVE(S) 24 VAC CHECK<br />
During 4 Second Trial for Ignition. Ref: Pages 57 and 58 Wiring Diagram<br />
Gas Valve(s) 24 VAC Check.<br />
S<br />
T<br />
E<br />
P<br />
28 Test For 24 VAC between ground and gas valve BL/Y connection and<br />
then ground and gas valve BL/R connection.<br />
S<br />
T<br />
E<br />
P<br />
RESULTS<br />
Test of 1R (DPST) Relay - Power Supply<br />
9 Test for 120 VAC between terminals 0 and 1 on DPST Relay.<br />
If the meter:<br />
then<br />
does not read 120 VAC<br />
check wiring to Ram HSI<br />
control terminal 1 and relay<br />
terminal 1.<br />
does read 120 VAC go to Step 10.<br />
RESULTS<br />
If the meter:<br />
does not read 24 VAC between the gas valve BL/Y<br />
wire connection and ground<br />
does not read 24 VAC between the gas valve BL/R<br />
wire connection and ground<br />
does read 24 VAC between gas valve connection<br />
BL/R and also 24 VAC between gas valve BL/Y wire<br />
connection<br />
then<br />
correct wiring connections<br />
from RAM HSI control terminal<br />
7 to lower (24V) terminal stripterminal<br />
12 to gas valve BL/Y<br />
wire terminal.<br />
correct wiring from RAM 7 to<br />
lower (24V) terminal strip -<br />
terminal 12 - to gas valve BL/R<br />
wire terminal.<br />
go to Step 29.<br />
A.O. <strong>Smith</strong> <strong>Water</strong> Products Co.<br />
Irving, Texas © 1997<br />
28<br />
Service Workbook<br />
Training Department<br />
A.O. <strong>Smith</strong> <strong>Water</strong> Products Co.<br />
Irving, Texas © 1997<br />
53<br />
Service Workbook<br />
Training Department
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