17
Air Circulation Blower
Gas Valve
Ignitor
Pressure Switch
(N.O. Contacts)
Combustion Blower
Thermostat
ON
OFF
ON
OFF
ON
OFF
ON
OFF
OPEN
CLOSED
CLOSED
OPEN
Seconds 0 34 38 110 0 90
T
h
er
m
o
sta
t O
N
Ga
s
Va
lv
e
Op
e
n
s
Ig
n
it
o
r O
F
F
Air
Bl
o
w
e
r O
N
T
h
er
m
o
sta
t O
F
F
C
o
m
b
us
ti
on
P
ro
d
uc
t
Pu
rg
e E
n
d
s
.
Air
Bl
o
w
e
r O
F
F
C
o
m
b
us
ti
on
B
lo
w
e
r OF
F
Figure 12
Timing Chart for Normal Robertshaw Operation (PGB & PGC)
Figure 13B
PGC Timing Chart for Normal Cooling Operation
On
Off
On
Off
On
Off
Seconds 0 30 0 30
(approx.) (approx.)
Indoor Fan
Outdoor Fan
and
Compressor
Thermostat
Figure 13A
PGB Timing Chart for Normal Cooling Operation
On
Off
On
Off
On
Off
Seconds 0 15 0 45
(approx.) (approx.)
Indoor Fan
Outdoor Fan
and
Compressor
Thermostat
Summary of Contents for PGB58B
Page 8: ...8 Figure 1 Required Clearances For All Installations...
Page 29: ...29 XVI Wiring Diagram PGC24 36...
Page 30: ...30 PGC 42...
Page 31: ...31 PGC 48...
