Airmax MaxAir 100 LV, Installation And Maintenance Instructions Manual

Page: 19 / 48

Page 19
ON/OFF: ON = input VDC > 0.5VDC +/- 0.1V
OFF = input VDC <0.4VDC +/- 0.1V
FIG 2
b.) Switched 24VAC INPUTS (SW3-1 IN "DISCRETE POSITION": (see para. 5.)
G
– Fan Only MODE
Y2 & O & G
– HIGH COOL MODE
Y1 & O & G
– LOW COOL MODE
W1
– 1
st
STAGE HEAT MODE
W2
– 2
nd
STAGE HEAT MODE
Y1 & G & NOT O
– Low Stage Heating (with Heat Pump)
Y2 & G & NOT O
– High Stage Heating (with Heat Pump)
D
– Accessory Control (Dehumidifier, Aquastat, etc). D is connected to ”R”
when shunt H5 is in place. Remove H5 to control the D terminal by an
external switch.
b.1.) INPUTS SPECIFICATIONS
Input Impedance:
Y1 and Y2
~1K Ohm between: each terminal to C (24VAC Return).
Minimum acceptable cooling anticipator resistance: 3.3K Ohms between 24Vac(R) to Y1
or Y2
All other inputs:
>10K Ohm between each terminal and C (24VAC return).
Load Current FORM FACTOR
— All Inputs:
Positive Half-Wave (with respect to C (24VAC
RTN)
MIN AND MAX INPUT VOLTAGE
– All 24VAC Inputs:
Signals ACTIVE : 20VAC minimum. 30VAC Maximum; Current: <15ma @30VAC.
Signals INACTIVE : <4VAC (Current from any signal source, switch, and/or external
snubbers must hold inputs to <4VAC or DC)
NOTE: DO NOT CONNECT THE SWITCHED 24VAC INPUTS FROM A 2
nd
, SEPARATE
TRANSFOMER THAN THE 24VAC SOURCE SUPPLYING POWER TO THIS CONTROL
UNLESS THE TRANSFORMER SUPPLYING THIS CONTROL AND THE 2
ND
TRANSFORMER ARE PHASED PROPERLY WITH THEIR COMMONS CONNECTED.
3.
OUTPUTS
A. CONNECTIONS TO EC MOTOR (ECM): J3 PIN-OUTS