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37UH-PRC002-EN
Electric
Power
Sequence of Operation
Electronic Modulating Control
(with room thermostat)
L2
L1
DISCONNECT
LINE IN 115V/1/60
L1
FAN TIME DELAY
SUMMER/WINTER SWITCH
W
S
8
8
L2
BLOWER
MOTOR
DRAFTOR
MTR
K5
BLACK
BLACK
2
FAN TIME DEALY
DL
L2
L1
115V TO
24V XFORMER
50 VA
21
24
VOLTS
FURNACE ONE HIGH LIMIT
1
2
3
R1
DL
W1
DRAFTOR ONE
K5
MV SOL.
PV SOL.
58600 IGNITOR
MV
MV/PV
PV
GND
24V (GND)
24V (HOT)
SPARK
PRESS. SW.
IGN
V
2
W1
DL
2
V
1
1
MAXITROL
W/ROOM SENSING
4
3
5
9
10
8
11
7
1
3
1
7
9
T107A
TSTAT
USE
A1010 FOR
SINGLE FURNACE
A1011 FOR
MULTIPLE FURNACE
2
ONE
HR VALVE
PER
FURNACE
SECTION
MR1
1
2