Connecting sensor to back-up board – Hired-Hand ICS-500 Environmental Controller User Manual

Page 17

Integrated Control System 500 15

the sensor reaches one degree above the high limit, the back-up board would
start all stages set to cool one. (This could be any, or all of your cool stages.) If
temperature continues to rise, the back-up would then start cool 2 (all other
cool stages). This should lower temperature below the setpoint.
If you use the unit as shipped, the back-up system would engage all cool stages
at the same time.
Note: If you want the two step cooling option, you will need to wire the panel as
shown in the drawing on the next page.

6.2.2.2. Low Limit

If your house temperature drops below the low limit, all heat stages would be
turned on by the back-up board until temperature is brought back up to the low
limit.

6.2.2.3. Reminder Reset Button

The last control on the back-up board is the reminder reset button. During a
growout you lower house temperature as your animals mature. It is vitally
important to reset your high and low limits as well. If you did not reset your
back-ups, the difference between target temperature and the back-up setpoint
could reach 30 to 40 degrees. The reminder alert buzzer warns you to check
your back-up setpoints every five days. Note: It is important to check your
back-up setpoints daily.

RLY1

RLY2

RLY3

BP1

uln2803n

pic16c71xt

R20

R19

R18

R10

R17

R16

R15

R14

R11

R12

R13

VR2

HIRED-HAND

ALARM

VR1

ZNR1

ZNR2

BR1

SENSOR

COOL 2

COOL 1

HEAT

J11

J10

PCB131 (Rev B) 19 July 1994 M. Calvert

c 1994,1995 Hired Hand, Inc.

P/N 3580-0131

White

Shield

Black

The White and Shield wires need

to be crimped together and

connected to this terminal.

Connecting Sensor to

Back-Up Board