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100% PILOT SAFETY (IID Units)
All heaters employ electronic devices, which close
the main gas valve within 8/10 of a second whenever the
pilot flame is interrupted. Pilot flame is automatically lit
when the device is powered. Unit performs its own safety
check and opens the main valve only after the pilot is
proven to be lit.
ELECTRICAL
Heater electrical characteristics are
Primary: 115 volt 60 Hz 1 phase.
Secondary: Control Circuit: 24 volts.
CAUTION: All wires prior to disconnection when servic-
ing controls. Wiring errors can cause improper and
dangerous operation. Verify proper operation after
servicing.
DANGER - SHOCK HAZARD
make sure electrical power to the heater is disconnected
to avoid potential serious injury or damage to compo-
nents.
The heater is normally wired for 120 Volts. The
voltage is indicated on the tie-in leads. Consult the wiring
diagram shipped with the boiler in the instruction packet.
The "TH" leads are for the remote tank control connec-
tions 24 Volts are supplied to this connection through the
heater transformer. DO NOT attach line voltage to the
"TH" leads on sized 133-1826. Before starting heater
check to insure proper voltage to boiler and pump.
Single Stage Tankstat
HEATER DPST TANKSTAT CONTROL WIRING
Heater must be electrically grounded in accordance
with National Electrical Code ANSI/NFPA No. 70.
Single Stage Tankstat
NOTES:
1. Field Installed ground to inside of junction box.
2. If any of the original wire as supplied with the heater
must be replaced, it must be replaced with 105°C
wire or its equivalent.
WARNING:
Before starting check to insure proper voltage is supplied
to heater and pump.
Heater must be electrically grounded in accordance with
the National Electrical Code ANSI/NFPA No 70 latest
edition.
Use wiring diagram supplied with the heater.
START-UP
1. Fill system with water, flush, to remove particles
and other foreign objects that can cause pump
damage.
2. Check electric supply characteristics
a. Voltage to heater: 115 volts 60 Hz. 1 phase
b. Voltage to pump:
3. Set operating and limit controls.
ON-OFF OPERATION
Set storage tank tankstat to desired temperature.
This is the operating control. See Operation sequence,
page 22.
29
15 amp circuit breaker.
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