SYSTEM WIRING CONTINUED
Typical 2 stage gas furnace with 2
stage A/C. Constant or variable
speed systems can be connected
and controlled. Choose Timer or
Outside air to delay 2nd stage.
Single
Transformer
Gas & A/C
2 stage heat
2 stage cool
Figure 11 Single transformer 2 Stage Heat & Cool system
2 STAGE GAS
FURNACE
BMPlus 3000
Figure 12 -- 3 Heat / 2 Cool Heat Pump with
B (Heat) Type Reversing Valve
Warning: All of the wiring diagrams provided are
general in nature and may not perfectly match your
particular application, due to differences in HVAC Mfr’s
design and terminal designations and functions!
Variations on these diagrams and other System or
Thermostat applications are available by contacting the
EWC Technical Support Hotline.
ENHANCED FEATURES AND FUNCTIONS
The BMPlus 3000 Zone Control System
includes the Shorted Zone Feature. This
feature allows the BMPlus to ignore demands
from a zone thermostat that is putting out
simultaneous demands for heat & cool. A
condition most likely due to a short in the field
wiring, incorrect wiring, or a defective
thermostat. The BMPlus will honor any
legitimate demands from any other zone(s),
except the shorted zone. When the problem is
identified and repaired, the BMPlus 3000 will
automatically recognize that zone.
DUAL FUEL COMPATIBLE
MODULE TO MODULE FACTORY POWER WIRING
SHORTED ZONE FEATURE FIRMWARE
* OFF, 7 TO 42 MINUTE STAGING TIME DELAY SETTINGS
* 7 TO 42°F. OUTSIDE AIR CHANGEOVER
* OPERATES WITH MULTI STAGE HEATPUMPS
* STATUS LED’s ARE INCLUDED ON ALL MODULES
*1 ZONE MODE COMPLIES WITH CALIFORNIA TITLE 24
* SIMPLIFIED WIRING AND EASY SYSTEM SETUP
The BMPlus 3000 is compatible with Dual Fuel
Heat Pumps. Dual Fuel kits are not required.
Select staging based on Adjustable Time
Delay or an Optional Outside Air temperature
Sensor. The intelligent firmware does the rest.
The BMPlus 3000 includes Factory Power
Wiring on all expanded systems. The 24 vac
power to the expansion modules is fed
through the bus cable. This simplifies your
wiring and minimizes the chances of reversing
polarity.
EWC Controls Inc. 385 Highway 33 Englishtown, NJ 07726 800-446-3110 FAX 732-446-5362 E-Mail- info@ewccontrols.com
7
* ADJUSTABLE DIFFERENTIAL LIMIT CONTROL
*SECOND STAGE 50% ZONE RULE SAVES ENERGY
NOTE: If desired, you can connect a “C” Common
wire back to the “System” terminal block. Use it as
a TEST point while troubleshooting.
NOTE: The “R” wire connection to the condensing
unit may not be required on your system.
SYSTEM
O
W1/B
G
Y2
Y1
RH
RC
C
W2/E
RC/RH
LINK
2 STAGE
OUTDOOR
CONDENSING
UNIT
Y2
G
Y2
C
R
Y1
W1
W2
R
C
Y1
HEAT PUMP
2 STAGE
BMPlus 3000
SYSTEM
O
W1/B
G
Y2
Y1
RH
RC
C
W2/E
RC/RH
LINK
B
X/W
R
C
B
W1
W2
R
C
G
Y1
Y2
Y1
Y2
Conventional or
Dual Fuel 3 Heat /
2 Cool Heat Pump
with B (Heat) Type
Reversing Valve
Conventional or Dual Fuel Heat Pump wiring
with 3 Heat / 2 Cool with B (Heat) Type
Reversing Valve. Electric or Gas Furnace
Backup (No dual fuel kit is required). This
diagram applies to air cooled or geothermal /
ground source systems.
AIR HANDLER
OR 1 0R 2 STAGE
GAS FURNACE
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