Table of Contents
Advertisement
COOL JUMPERS
The COOL jumper is used to determine the CFM during
either 1) cooling or 2) heat pump operation without a call for
electric heat. These jumper selections are activated for
cooling when Y2 and DS terminals in the CB31MV are
energized and for heating when Y2 is energized.
Applications without the SignatureStatt humidity control
will provide either 70% of the COOL CFM during first−stage
cooling for two−speed outdoor units. 100% of COOL CFM
is provided for systems with a single−speed outdoor unit.
Applications with the SignatureStatt humidity control
create different CFM volumes. For example, during a
first−stage cooling call (two−speed outdoor unit) with
demand from the SignatureStatt thermostat, the air
volume is 40% of the COOL jumper selection. For a normal
COOL (Pin #2 setting for CB31MV−41), the CFM is 1125;
the reduced speed is 450 CFM (1125 x 40% = 450). This
arrangement provides for additional dehumidification
during standard first stage cooling. See tables 7 and 8 for
various scenarios concerning use of the SignatureStatt
humidity control and the CB31MV series unit.
For applications with Harmony II
CFM volume is determined by the Harmony II control
center. The minimum air handler speed is predetermined
at 650 CFM for −41 series units and 850 CFM for −51 and
−65 series units. This speed is not adjustable. See
footnotes in tables 5 and 6.
With the thermostat set for Continuous Fan" and without a
call for heating or cooling, the CB31MV will provided 50%
of the COOL CFM selected.
NOTE − For two−speed heat pumps, air handler will operate
at 70% of the COOL selection until supplemental electric
heat is demanded. At that time, the air handler will operate
at the HEAT speed selected. This arrangement provides
for warmer supply air during second−stage heating.
HEAT" JUMPERS
The HEAT jumper is used to determine CFM during
electric heat operation only. These jumper selections are
activated only when W1 is energized.
DELAY JUMPERS
The DELAY jumper is used to set the specific motor fan
operation during cooling mode. Depending on the
application, one of four options may be chosen by moving
the jumper to the appropriate set of pins.
#1 Pins Jumpered
A
Motor runs at 100% until demand is satisfied.
A
OFF
B
Once demand is met, motor ramps down to stop.
#2 Pins Jumpered
A
Motor runs at 100% until demand is satisfied.
A
OFF
R
zone control, the Blower
B
OFF
B
C
OFF
B
Once demand is met, motor runs at 100% for 45
seconds. Then,
C
ramps down to stop.
NOTE − Blower OFF DELAY also applies during heat
pump operation
#3 Pins Jumpered
A
Motor runs at 82% for approximately 7−1/2
minutes. If demand has not been satisfied after
7−1/2 minutes,
B
motor runs at 100% until demand is satisfied.
A
OFF
C
Once demand is met, motor ramps down to stop.
#4 Pins Jumpered
A
Motor runs at 50% for 30 seconds.
B
Motor then runs at 82% for approximately 7−1/2
minutes. If demand has not been satisfied after
7−1/2 minutes.
C
Motor runs at 100% until demand is satisfied.
D
Once demand is met, motor runs at 50% for 30
seconds. Then,
B
A
OFF
E
ramps down to stop.
Making Electrical Connections
Wiring must conform to the current National Electric Code
ANSI/NFPA No. 70, or Canadian Electric Code Part I, CSA
Standard C22.1, and local building codes. Refer to
following wiring diagrams. See unit nameplate for
minimum circuit ampacity and maximum overcurrent
protection size.
Select the proper supply circuit conductors in
accordance with tables 310−16 and 310−17 in the
National Electric Code, ANSI/NFPA No. 70 or tables 1
through 4 in the Canadian Electric Code, Part I, CSA
Standard C22.1.
USE COPPER CONDUCTORS ONLY!
This unit is provided with knockouts for conduit. Refer to
figure 16 for unit schematic wiring diagram. Refer to
figures 17, 19, 20 and 21 for typical field wiring.
Separate openings have been provided for 24V low
voltage and line voltage. Refer to the dimension illustration
of specific location.
Run 24V Class II wiring only through specified low
voltage opening. Run line voltage wiring only
through specified high voltage opening. Do not
combine voltage in one opening.
Page 11
B
C
WARNING
WARNING
C
OFF
D
E
OFF
CB31MV SERIES
Advertisement
Table of Contents
