Heating System User Manual

7
LO
C
K
-O
U
T
TA
G
ON
OFF
MAIN
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
STEP 7
Two-Stage
RTU gas valve
Single-Stage
RTU gas valve
On/Off
Switch
On/Off
Switch
C08543
Fig. 4 -- To Shut Unit Off (Units with Electro --Mechanical Control)
48PD, 48PG