Page 20
(SEE FIG 3):
J5
–pin-1:
START/STOP
: When the Blower motor is commanded to operate this signal
enables motor operation. (Use is optional. Use if the system requires a separate
enable.)
0VDC = not enabled, 22VDC (nom) = enabled
10ma maximum sourced current.
J5
–pin-2:
COMMON
– J5 Outputs Common (to
isolated
common input(s) on motor/drive).
DO NOT CONNECT COMMON TO 24VAC RET
J5
–pin-3
: PWM Motor Command
: 0% to 100% duty-cycle.
OFF: 0VDC (min). ON: 22VDC (peak). 10ma max sourced current.
When measured on a DC voltmeter, the signal level varies from 0VDC to ~22VDC
max as the percent PWM duty cycle increases from 0 to 100%.
The
Green LED
“
BLWR CMND
” illuminates when the PWM command is active.
Brightness increases with PWM duty cycle.
J5
–pin-4: NO CONNECTION
B. HIGH VOLTAGE RELAY OUTPUTS:
a.
A1, A2, A3 (PUMP) Relay (Formerly “WV RELAY”)
Contacts A1 (NO), A2 (NC) to A3 (Po
le): A3 is “Dry” and can be connected to an external
voltage source for switching to A1, A2.
The WV Relay is energized under the following conditions:
1) SWITCH “PUMP TMR ON” POSITION,
AND
2) Upon detecting a call for W1 or W2 (no delay)
OR
3) If W1 or W2 was not active for 6 (or 24) consecutive powered hours.
The
green “W_TIMER” LED
illuminates when the PUMP relay is activated.
b.
ACCESSORY Relay (ACC, ACCp):
Contact ACC (NO) connects to pole ACCp. These are DRY Contacts and can be connected
to an external voltage source.
The Accessory relay is energized with
"G"
. i.e. Any call from the thermostat
that includes
an active "G" signal energizes this relay.
c.
MAXIMUM CONTACT RATINGS:
8A @120 VAC (resistive)
8A @ 240 VAC (resistive)
C.
LOW VOLTAGES RELAY OUTPUTS:
All Three low voltage relay contacts are rated 1AMP maximum @ 30VAC maximum.
a.
"X1" LOW STAGE "Y" RELAY (Contact X1):
i.
The LOW Stage Y relay activates upon detecting a call for “Y1” (with or without
“
O
” active).
ii.
Upon activation, the X1 terminal connects to "R" (the 24VAC powering the
DCC7235).
This relay is NOT DRY; i.e. its pole is permanently connected to
“R”.
b.
"X2" High Stage "Y" RELAY" (Contact X2):
i.
The HIGH Stage Y relay activates on a call for Y2 (with or without “
O
” active.
ii.
On activation, the X2 terminal connects to "R" (the 24VAC powering the
DCC7235).
This relay is NOT DRY; i.e. its pole is permanently connected to
“R”.
c.
“Z” RELAY" (Contacts Z1, Z1p):
i.
The Z1 terminal
switches to Zp on any
Summary of Contents for MaxAir 100 LV
Page 31: ...Page 31 WIRING DIAGRAM STANDARD UNITS...
Page 32: ...Page 32 WIRING DIAGRAM MAXe UNITS...
Page 33: ...Page 33 FAN COIL DIMENSIONS AND RETURN AIR SIZE LOCATION...
Page 34: ...Page 34...
Page 35: ...Page 35...
Page 36: ...Page 36...
Page 41: ...Page 41 2 AND 2 5 TON EVAPORATOR COIL SIZES 70 IPCE 24 30A...
Page 42: ...Page 42 SAMPLE PIPING SCHEMATICS...
Page 43: ...Page 43...
Page 44: ...Page 44...
Page 45: ...Page 45...
