Boyertown nrgMax Universal Oil Control V4.0 - Manual (Page 5)

OPERATIONAL MODES:
All operational modes are simultaneously active on
the 9103i, and the user needs only to make the
appropriate connections to make use of them. The
DIP-Switch is interpreted by the on-board software
differently for each mode of operation.
• Standard PSC: Blower motor is driven by on-board
heavy duty relays. Heat, Cool and Continuous
speeds are available from 0.250” male spade
terminals clearly marked on board. Compatible with
all 5+ wire thermostats and responds to:
◦ W: heating
◦ Y1: cooling
◦ Y2: cooling
◦
G: Blower On
◦ DIP-Switch:
▪ Blower Off Delay (BOD):
• A: 90 Seconds
• B: 120 Seconds
• C: 150 Seconds
• D: 180 Seconds
▪ Heat: no function
▪
Cool: no function
▪ Adj: no function
OPTION:
Enhanced PSC Mode is selected by placing the
option jumper across position #3 and #4 on the
Option Select pins (See “Setting Options”). All wiring
and connections remain the same as the Standard
PSC mode, however the operation is enhanced.
ENABLE THIS OPTION ONLY WHEN THE COOL
TERMINAL IS CONNECTED TO A HIGHER
BLOWER SPEED THAN HEAT OUTPUT.
EXAMPLE:
“HEAT” CONNECTED TO MED-HIGH
“COOL” CONNECTED TO HIGH
• Heating:
◦
W (24V signal) activates Heat Speed
output
◦ W+W2 (24V signals) activate Cool
Speed.
• Cooling: Blower is initially started on Heat
Speed for 4 minutes to allow for
dehumidification, after which the blower
switches to Cool Speed. If the the 24VAC
signal to the DH terminal opens this signals
a call to dehumidify and the blower drops
down to heat speed to encourage greater
condensation across the cooling coil. When
the 24VAC signal reappears on DH the
blower is switched back up to Cool speed.
◦
Y1 (24V signal): 4 minutes at Heat
speed to dehumidify, then to Cool
speed
◦ DH (NO 24V signal): immediately
drops from Cool speed to Heat speed
to dehumidify.
◦ DH (24V signal returns): Blower
stepped up to Cool speed
◦ Y2 (24V signal) overrides DH and Y1
keeping Cool terminal on as long as
signal on Y2 is present
◦
G (24V signal alone without Y1, Y2, or
W): energizes Heat terminal
Note: for 2-stage cooling in Enhanced mode use Yx
and Y2. Yx is a dummy terminal and is ignored by
the control logic but provides a convenient
connection point for the AC compressor. When the
thermostat calls for stage 1 cooling (a Y1 signal from
the thermostat) it is terminated at Yx, but the
thermostat also activates G simultaneously. The
9103i then energizes the lower speed Heat terminal
as long as the condition exists. If Y2 is energized
(together with Y1/G, or separately) the control will
switch to Cool speed. This allows for 2 different
blower speeds for 2-stage cooling
• ECM Mode: ECM Motor handles all blower speed
logic in factory-set “thermostat mode” and it monitors
all ten thermostat inputs. The 9103i control
energizes the EAC and H terminals normally. While
the DIP-Switch settings are now directed to the ECM
motor through the 16-pin connector the 9103i will
continue to interpret the BOD settings to establish
the delay period before de-energizing EAC terminal.
Please note that the OEM factory -settings for the
ECM blower-off delay may not co-ordinate with the
EAC delay. The 9103i Controller has no influence
over the ECM motor as all signals are “pass-
through” only.