AI
SERIES STEAM BOILER WITH T100 CONTROL
INSTALLATION INSTRUCTIONS
4211-195 05-22-12
Page 21
APPENDIX 1: RUN CLOCK AND AUTODRAIN BLOWDOWN CLOCK
The AI series boilers may be factory equipped with an optional Run Clock (Boiler ON/OFF control) and/or a Drain Clock (operating an electronic Auto-
drain blowdown valve). Two clocks are available: a 7-day clock typically used for Boiler ON/OFF operation and a 24 hour clock typically used for daily
blowdown (or optionally for Boiler ON/OFF operation). Both clocks connect and function in the same manner. The 7-day clock is adjustable in two hour
intervals, the 24 hour clock is adjustable in 15 minute intervals.
TO SET: Turn the clock dial to the right (clockwise) until the pointer matches the current time (and
day) on the clock dial. Move set-tabs towards the clock center for the periods the boiler should be ON
(or the drain should be open) and away from the center for OFF (or drain closed) periods. When the
clock’s pointer is in an area with orange showing, its switch will close and turn the boiler ON or open
the Autodrain for blowdown.
NOTE:
The clocks operate on 120VAC supplied by the boiler’s control circuit. If this circuit loses
power, the clocks must be reset to the correct time.
CONNECTIONS: Always turn off all power to the boiler before working on the electrical circuits! Remove the top (angled) cover from the electrical box by
removing the two mounting screws. Insert the clock in its mounting cut-out (RUN in the left hole, DRAIN in the right hole) and connect the clock’s wires
as shown below. Wires are marked with their locations.
Note:
The drain valve’s wires are connected to the power wire from the DRAIN CLOCK and a Neutral lead in the boiler’s contactor compartment.
120VAC (or 240V~) FUSED
From Boiler Operation Switch
Neutral from BOILER ON light
Black
White
To Drain Wire
To Boiler Operation
Switch & On Light
