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The boiler, when installed, must be electrically bonded
to ground in accordance with the requirements of the
authority having jurisdiction or, in the absence of such
requirements, with the National Electrical code, ANSI/NFPA
70, and/or the Canadian Electrical Code Part I, CSA C22.1,
Electrical Code.
Electrical shock hazard. Turn OFF electrical
!
power supply at service panel before making
electrical connections. Failure to do so could
result in death or serious injury.
Component And Wire Coding Keys
• The keys that follow pertain to the HOT WATER
CONTROL AND HOT SURFACE PILOT WIRING FOR
SEALED COMBUSTION SERIES (diagrams on following
page).
• If any of the original wiring supplied with the boiler is
replaced it must be replaced with like wire size and type
of insulation or equivalent.
Label all wires prior to disconnection when
!
servicing controls. Wiring errors can cause
improper and dangerous operation. Verify
proper operation after servicing.
Install Your Thermostat
• The thermostat location has an important effect on the
operation of your boiler system.
• BE SURE TO FOLLOW THE INSTRUCTIONS INCLUDED
WITH YOUR THERMOSTAT.
• Locate the thermostat about four feet (4') above the
floor on an inside wall.
• Check thermostat operation by raising and lowering
thermostat setting as required to start and stop burners.
ELECTRICAL WIRING
WARNING
CAUTION
COMPONENT KEY
Thermostat (24 Volt)
Transformer (120V/24V 40VA)
Transformer (120V/24V 40VA)
24 Volt Gas Valve
Pressure Switch
Control Terminal
Relay Coil
Relay Contacts
Relay Contacts
Limit Switch
Circulator
Wire Connection
Not all components listed are used in all control
systems.
WIRING CODE KEY
THINGS TO AVOID WHEN
LOCATING THERMOSTATS
DEAD SPOTS:
Corners and alcoves
COLD SPOTS:
Concealed pipes or ducts
Stairwells - drafts
Unheated rooms on
other side of wall
Outside wall
11
CODING
TH-2
TR-1
TR-2
SV9501H
1K1
1K2
CIR
LINE VOLTAGE BY FACTORY
LOW VOLTAGE BY FACTORY
LINE VOLTAGE BY INSTALLER
LOW VOLTAGE BY INSTALLER
Behind doors
HOT SPOTS:
Concealed pipes
Fireplace or chimney
TV sets
Radios
Lamps
Direct sunlight
Kitchens
PS
1K
LS
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