SECTION 10: W
IRING
25 of 51
10.6 UHA[X][S] Series Ladder Wirin
g
Dia
g
ram
FLAME
SENSOR
PRESSURE SWITCH
THERMOSTAT
CONNECTION
6
3
4
5
2 1
120 VAC
TRANSFORMER
FLUE BLOWER
AXIAL FAN
AXIAL FAN
UHA (300, 350, 400 O
n
ly)
GAS VALVE
ELECTRODE
IGNITION
MODULE
Flame
S
pa
r
k
Limit
S
witch Limit
S
witch (UHA 300,
350, 400 O
n
ly)
Ma
nu
al Reset Limit
S
witch
(UHA 30 - 125 O
n
ly)
NOTE:
For field
w
iring into service j
u
nction box, or if any of the original
w
ire s
u
pplied
w
ith the heater
m
u
st be replaced, it m
u
st be replaced
w
ith
w
iring material having a temperat
u
re rating of at least 105° C
(221° F) and 600 volts. For s
u
pply connections
u
se No. 14 AWG or larger
w
ires.