Operating instructions
Part number 550-141-887/0800
23
AHE Series 4 Direct Vent Wall-Mounted Boilers — Boiler Manual
10b Operation — wiring diagram
Figure 18
N
G
Notes:
SERVICE
SWITCH
H
Items not provided
Table G: Gas valve terminals and anticipator settings
Honeywell VR8205A
Robertshaw 7200DER
White-Rodgers 36E
2
2
MVMV
1
1
Gas valve
"A" "B"
Anticipator
amps
0.6
0.7
0.7
Electrical shock hazard — can cause severe injury or
death. Disconnect power before installing or servicing.
SERVICE
SWITCH
THERMOSTAT
THERMOSTAT
120 VAC
120 VAC
24 VAC
24 VAC
Control module
low voltage
section
CONTROL
MODULE
120 VAC
SECTION
Power
G
Tstat–Circ
Limit
Press switch
Flame
Flame
sensor
ROLLOUT
TFE
ROLLOUT
TFE
INDUCER MOTOR
INDUCER MOTOR
CIRCULATOR
CIRCULATOR
WATER TEMP
LIMIT SWITCH
WATER TEMP
LIMIT SWITCH
GAS VALVE
GAS VALVE
AIR PRESSURE
SWITCH
AIR PRESSURE
SWITCH
HOT SURFACE
IGNITER
HOT SURFACE
IGNITER
HIGH
VOLTAGE
HIGH
VOLTAGE
120 VAC
See Table G
Schematic Wiring Diagram
Ladder Wiring Diagram
"A"
"A"
"B"
"B"
ROLLOUT TFE
BK
BK
Y
YY
Y
Y
Y
Y
W
BK
JUNCTION BOX
WATER
TEMPERATURE
LIMIT SWITCH
BLOCK
TEMPERATURE
SWITCH
IGNITION MODULE
THERMOSTAT
OR END SWITCH
(Note 3)
PRESSURE SWITCH
"A" "B"
GAS VALVE
TERMINAL BLOCK
(see Table G)
Hot surface igniter
BK
G
G
W
WW
W
BK
BK
R
R
Resistor
R
R
RR
W
BR
BR
GBK BK
G
BK
C
NO
NC
BL BL
W
CIRCULATOR
WIRE NUTS
EQUIPMENT
GROUND
INDUCER
MOTOR
TRANSFORMER
Part Number
550-223-787/0800
AHE Series 4
• Hot surface ignition
• Natural or propane gas
• Forced hot water
Legend
120 VAC FACTORY WIRING
LOW VOLTAGE FACTORY WIRING
120 VAC FIELD WIRING
LOW VOLTAGE FIELD WIRING
Plug-in connectors
Red
White
BL
BL
EQUIPMENT
GROUND
N
G
H
(note 6)
(note 10)
(note 3)
(note 8)
(note 7)
BLOCK
TEMPERATURE SWITCH
R
R
R
R
BK BK
G
WW
G
W
BK
G
GG
BK BK
A United Dominion Company
Weil-McLain • 500 Blaine St. • Michigan City, IN 46360-2388
1.All wiring must be installed in accordance with:
A.U.S.A. — N.E.C. And any other national, state, or local code
requirements.
B.Canada — C.S.A. C22.1 C.E.C. Part 1 and any other national,
provincial, or local code requirements.
2.If any of the original wire as supplied with the appliance must be
replaced, use minimum 105 °C wire or equivalent. Exception: Wires to
Rollout TFE must be 200 °C or equivalent.
3.Thermostat anticipator setting (single zone) — see Table G for
anticipator setting, depending on which gas valve is installed in boiler.
4.For multiple zoning, use either zone valves or circulators. Refer to the
component manufacturer's instructions and this manual for application
and wiring suggestions.
5.Refer to control component instructions packed with the boiler for
application information.
6.All contacts shown without power applied.
7.Connector and status light locations may vary.
8.The control module is polarity-sensitive to the incoming 120 VAC
power. If polarity is reversed, control will flash the POWER light when
powered and will not cycle boiler.